interface_layout.c

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/*
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * Contributor(s): Blender Foundation 2009.
 *
 * ***** END GPL LICENSE BLOCK *****
 */

#include <limits.h>
#include <math.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>

#include "MEM_guardedalloc.h"

#include "DNA_screen_types.h"
#include "DNA_armature_types.h"
#include "DNA_userdef_types.h"

#include "BLI_listbase.h"
#include "BLI_string.h"
#include "BLI_utildefines.h"

#include "BLF_translation.h"

#include "BKE_context.h"
#include "BKE_global.h"
#include "BKE_idprop.h"
#include "BKE_screen.h"

#include "RNA_access.h"

#include "UI_interface.h"


#include "WM_api.h"
#include "WM_types.h"

#include "interface_intern.h"

/************************ Structs and Defines *************************/

#define RNA_NO_INDEX    -1
#define RNA_ENUM_VALUE  -2

#define EM_SEPR_X       6
#define EM_SEPR_Y       6

/* uiLayoutRoot */

typedef struct uiLayoutRoot {
    struct uiLayoutRoot *next, *prev;

    int type;
    int opcontext;

    int emw, emh;

    uiMenuHandleFunc handlefunc;
    void *argv;

    uiStyle *style;
    uiBlock *block;
    uiLayout *layout;
} uiLayoutRoot;

/* Item */

typedef enum uiItemType {
    ITEM_BUTTON,

    ITEM_LAYOUT_ROW,
    ITEM_LAYOUT_COLUMN,
    ITEM_LAYOUT_COLUMN_FLOW,
    ITEM_LAYOUT_ROW_FLOW,
    ITEM_LAYOUT_BOX,
    ITEM_LAYOUT_ABSOLUTE,
    ITEM_LAYOUT_SPLIT,
    ITEM_LAYOUT_OVERLAP,

    ITEM_LAYOUT_ROOT
#if 0
    TEMPLATE_COLUMN_FLOW,
    TEMPLATE_SPLIT,
    TEMPLATE_BOX,

    TEMPLATE_HEADER,
    TEMPLATE_HEADER_ID
#endif
} uiItemType;

typedef struct uiItem {
    void *next, *prev;
    uiItemType type;
    int flag;
} uiItem;

typedef struct uiButtonItem {
    uiItem item;
    uiBut *but;
} uiButtonItem;

struct uiLayout {
    uiItem item;

    uiLayoutRoot *root;
    bContextStore *context;
    ListBase items;

    int x, y, w, h;
    float scale[2];
    short space;
    char align;
    char active;
    char enabled;
    char redalert;
    char keepaspect;
    char alignment;
};

typedef struct uiLayoutItemFlow {
    uiLayout litem;
    int number;
    int totcol;
} uiLayoutItemFlow;

typedef struct uiLayoutItemBx {
    uiLayout litem;
    uiBut *roundbox;
} uiLayoutItemBx;

typedef struct uiLayoutItemSplit {
    uiLayout litem;
    float percentage;
} uiLayoutItemSplit;

typedef struct uiLayoutItemRoot {
    uiLayout litem;
} uiLayoutItemRoot;

/************************** Item ***************************/

static const char *ui_item_name_add_colon(const char *name, char namestr[UI_MAX_NAME_STR])
{
    int len= strlen(name);

    if(len != 0 && len+1 < UI_MAX_NAME_STR) {
        BLI_strncpy(namestr, name, UI_MAX_NAME_STR);
        namestr[len]= ':';
        namestr[len+1]= '\0';
        return namestr;
    }

    return name;
}

static int ui_item_fit(int item, int pos, int all, int available, int last, int alignment, int *offset)
{
    /* available == 0 is unlimited */
    if(available == 0)
        return item;
    
    if(offset)
        *offset= 0;
    
    if(all > available) {
        /* contents is bigger than available space */
        if(last)
            return available-pos;
        else
            return (item*available)/all;
    }
    else {
        /* contents is smaller or equal to available space */
        if(alignment == UI_LAYOUT_ALIGN_EXPAND) {
            if(last)
                return available-pos;
            else
                return (item*available)/all;
        }
        else
            return item;
    }
}

/* variable button size in which direction? */
#define UI_ITEM_VARY_X  1
#define UI_ITEM_VARY_Y  2

static int ui_layout_vary_direction(uiLayout *layout)
{
    return (layout->root->type == UI_LAYOUT_HEADER || layout->alignment != UI_LAYOUT_ALIGN_EXPAND)? UI_ITEM_VARY_X: UI_ITEM_VARY_Y;
}

/* estimated size of text + icon */
static int ui_text_icon_width(uiLayout *layout, const char *name, int icon, int compact)
{
    int variable = ui_layout_vary_direction(layout) == UI_ITEM_VARY_X;

    if(icon && !name[0])
        return UI_UNIT_X; /* icon only */
    else if(icon)
        return (variable)? UI_GetStringWidth(name) + (compact? 5: 10) + UI_UNIT_X: 10*UI_UNIT_X; /* icon + text */
    else
        return (variable)? UI_GetStringWidth(name) + (compact? 5: 10) + UI_UNIT_X: 10*UI_UNIT_X; /* text only */
}

static void ui_item_size(uiItem *item, int *r_w, int *r_h)
{
    if(item->type == ITEM_BUTTON) {
        uiButtonItem *bitem= (uiButtonItem*)item;

        if(r_w) *r_w= bitem->but->x2 - bitem->but->x1;
        if(r_h) *r_h= bitem->but->y2 - bitem->but->y1;
    }
    else {
        uiLayout *litem= (uiLayout*)item;

        if(r_w) *r_w= litem->w;
        if(r_h) *r_h= litem->h;
    }
}

static void ui_item_offset(uiItem *item, int *r_x, int *r_y)
{
    if(item->type == ITEM_BUTTON) {
        uiButtonItem *bitem= (uiButtonItem*)item;

        if(r_x) *r_x= bitem->but->x1;
        if(r_y) *r_y= bitem->but->y1;
    }
    else {
        if(r_x) *r_x= 0;
        if(r_y) *r_y= 0;
    }
}

static void ui_item_position(uiItem *item, int x, int y, int w, int h)
{
    if(item->type == ITEM_BUTTON) {
        uiButtonItem *bitem= (uiButtonItem*)item;

        bitem->but->x1= x;
        bitem->but->y1= y;
        bitem->but->x2= x+w;
        bitem->but->y2= y+h;
        
        ui_check_but(bitem->but); /* for strlen */
    }
    else {
        uiLayout *litem= (uiLayout*)item;

        litem->x= x;
        litem->y= y+h;
        litem->w= w;
        litem->h= h;
    }
}

/******************** Special RNA Items *********************/

static int ui_layout_local_dir(uiLayout *layout)
{
    switch(layout->item.type) {
        case ITEM_LAYOUT_ROW:
        case ITEM_LAYOUT_ROOT:
        case ITEM_LAYOUT_OVERLAP:
            return UI_LAYOUT_HORIZONTAL;
        case ITEM_LAYOUT_COLUMN:
        case ITEM_LAYOUT_COLUMN_FLOW:
        case ITEM_LAYOUT_SPLIT:
        case ITEM_LAYOUT_ABSOLUTE:
        case ITEM_LAYOUT_BOX:
        default:
            return UI_LAYOUT_VERTICAL;
    }
}

static uiLayout *ui_item_local_sublayout(uiLayout *test, uiLayout *layout, int align)
{
    uiLayout *sub;

    if(ui_layout_local_dir(test) == UI_LAYOUT_HORIZONTAL)
        sub= uiLayoutRow(layout, align);
    else
        sub= uiLayoutColumn(layout, align);
    
    sub->space= 0;
    return sub;
}

static void ui_layer_but_cb(bContext *C, void *arg_but, void *arg_index)
{
    wmWindow *win= CTX_wm_window(C);
    uiBut *but= arg_but, *cbut;
    PointerRNA *ptr= &but->rnapoin;
    PropertyRNA *prop= but->rnaprop;
    int i, index= GET_INT_FROM_POINTER(arg_index);
    int shift= win->eventstate->shift;
    int len= RNA_property_array_length(ptr, prop);

    if(!shift) {
        RNA_property_boolean_set_index(ptr, prop, index, TRUE);

        for(i=0; i<len; i++)
            if(i != index)
                RNA_property_boolean_set_index(ptr, prop, i, 0);

        RNA_property_update(C, ptr, prop);

        for(cbut=but->block->buttons.first; cbut; cbut=cbut->next)
            ui_check_but(cbut);
    }
}

/* create buttons for an item with an RNA array */
static void ui_item_array(uiLayout *layout, uiBlock *block, const char *name, int icon, PointerRNA *ptr, PropertyRNA *prop, int len, int x, int y, int w, int UNUSED(h), int expand, int slider, int toggle, int icon_only)
{
    uiStyle *style= layout->root->style;
    uiBut *but;
    PropertyType type;
    PropertySubType subtype;
    uiLayout *sub;
    int a, b;

    /* retrieve type and subtype */
    type= RNA_property_type(prop);
    subtype= RNA_property_subtype(prop);

    sub= ui_item_local_sublayout(layout, layout, 1);
    uiBlockSetCurLayout(block, sub);

    /* create label */
    if(name[0])
        uiDefBut(block, LABEL, 0, name, 0, 0, w, UI_UNIT_Y, NULL, 0.0, 0.0, 0, 0, "");

    /* create buttons */
    if(type == PROP_BOOLEAN && ELEM(subtype, PROP_LAYER, PROP_LAYER_MEMBER)) {
        /* special check for layer layout */
        int butw, buth, unit;
        int cols= (len >= 20)? 2: 1;
        int colbuts= len/(2*cols);
        int layer_used= 0;

        uiBlockSetCurLayout(block, uiLayoutAbsolute(layout, 0));

        unit= UI_UNIT_X*0.75;
        butw= unit;
        buth= unit;

        if(ptr->type == &RNA_Armature) {
            bArmature *arm= (bArmature *)ptr->data;
            layer_used= arm->layer_used;
        }

        for(b=0; b<cols; b++) {
            uiBlockBeginAlign(block);

            for(a=0; a<colbuts; a++) {
                if(layer_used & (1<<(a+b*colbuts))) icon= ICON_LAYER_USED;
                else icon= ICON_BLANK1;

                but= uiDefAutoButR(block, ptr, prop, a+b*colbuts, "", icon, x + butw*a, y+buth, butw, buth);
                if(subtype == PROP_LAYER_MEMBER)
                    uiButSetFunc(but, ui_layer_but_cb, but, SET_INT_IN_POINTER(a+b*colbuts));
            }
            for(a=0; a<colbuts; a++) {
                if(layer_used & (1<<(a+len/2+b*colbuts))) icon= ICON_LAYER_USED;
                else icon= ICON_BLANK1;

                but= uiDefAutoButR(block, ptr, prop, a+len/2+b*colbuts, "", icon, x + butw*a, y, butw, buth);
                if(subtype == PROP_LAYER_MEMBER)
                    uiButSetFunc(but, ui_layer_but_cb, but, SET_INT_IN_POINTER(a+len/2+b*colbuts));
            }
            uiBlockEndAlign(block);

            x += colbuts*butw + style->buttonspacex;
        }
    }
    else if(subtype == PROP_MATRIX) {
        int totdim, dim_size[3];    /* 3 == RNA_MAX_ARRAY_DIMENSION */
        int row, col;

        uiBlockSetCurLayout(block, uiLayoutAbsolute(layout, 1));

        totdim= RNA_property_array_dimension(ptr, prop, dim_size);
        if (totdim != 2) return;    /* only 2D matrices supported in UI so far */
        
        w /= dim_size[0];
        /* h /= dim_size[1]; */ /* UNUSED */

        for(a=0; a<len; a++) {
            col= a % dim_size[0];
            row= a / dim_size[0];
            
            but= uiDefAutoButR(block, ptr, prop, a, "", ICON_NONE, x + w*col, y+(dim_size[1]*UI_UNIT_Y)-(row*UI_UNIT_Y), w, UI_UNIT_Y);
            if(slider && but->type==NUM)
                but->type= NUMSLI;
        }
    }
    else if(subtype == PROP_DIRECTION) {
        uiDefButR_prop(block, BUT_NORMAL, 0, name, x, y, UI_UNIT_X*3, UI_UNIT_Y*3, ptr, prop, 0, 0, 0, -1, -1, NULL);
    }
    else {
        /* note, this block of code is a bit arbitrary and has just been made
         * to work with common cases, but may need to be re-worked */

        /* special case, boolean array in a menu, this could be used in a more generic way too */
        if(ELEM(subtype, PROP_COLOR, PROP_COLOR_GAMMA) && !expand) {
            uiDefAutoButR(block, ptr, prop, -1, "", ICON_NONE, 0, 0, w, UI_UNIT_Y);
        }
        else {
            int *boolarr= NULL;

            /* even if 'expand' is fale, expanding anyway */

            /* layout for known array subtypes */
            char str[3]= {'\0'};

            if(!icon_only) {
                if(type != PROP_BOOLEAN) {
                    str[1]= ':';
                }
            }

            /* show checkboxes for rna on a non-emboss block (menu for eg) */
            if(type == PROP_BOOLEAN && ELEM(layout->root->block->dt, UI_EMBOSSN, UI_EMBOSSP)) {
                boolarr= MEM_callocN(sizeof(int)*len, "ui_item_array");
                RNA_property_boolean_get_array(ptr, prop, boolarr);
            }

            for(a=0; a<len; a++) {
                if(!icon_only) str[0]= RNA_property_array_item_char(prop, a);
                if(boolarr) icon= boolarr[a] ? ICON_CHECKBOX_HLT: ICON_CHECKBOX_DEHLT;
                but= uiDefAutoButR(block, ptr, prop, a, str, icon, 0, 0, w, UI_UNIT_Y);
                if(slider && but->type==NUM)
                    but->type= NUMSLI;
                if(toggle && but->type==OPTION)
                    but->type= TOG;
            }

            if(boolarr) {
                MEM_freeN(boolarr);
            }
        }
    }

    uiBlockSetCurLayout(block, layout);
}

static void ui_item_enum_expand(uiLayout *layout, uiBlock *block, PointerRNA *ptr, PropertyRNA *prop, const char *uiname, int h, int icon_only)
{
    uiBut *but;
    EnumPropertyItem *item;
    const char *name;
    int a, totitem, itemw, icon, value, free;

    RNA_property_enum_items_gettexted(block->evil_C, ptr, prop, &item, &totitem, &free);

    uiBlockSetCurLayout(block, ui_item_local_sublayout(layout, layout, 1));
    for(a=0; a<totitem; a++) {
        if(!item[a].identifier[0])
            continue;

        name= (!uiname || uiname[0])? item[a].name: "";
        icon= item[a].icon;
        value= item[a].value;
        itemw= ui_text_icon_width(block->curlayout, name, icon, 0);

        if(icon && name[0] && !icon_only)
            but= uiDefIconTextButR_prop(block, ROW, 0, icon, name, 0, 0, itemw, h, ptr, prop, -1, 0, value, -1, -1, NULL);
        else if(icon)
            but= uiDefIconButR_prop(block, ROW, 0, icon, 0, 0, itemw, h, ptr, prop, -1, 0, value, -1, -1, NULL);
        else
            but= uiDefButR_prop(block, ROW, 0, name, 0, 0, itemw, h, ptr, prop, -1, 0, value, -1, -1, NULL);

        if(ui_layout_local_dir(layout) != UI_LAYOUT_HORIZONTAL)
            but->flag |= UI_TEXT_LEFT;
    }
    uiBlockSetCurLayout(block, layout);

    if(free)
        MEM_freeN(item);
}

/* callback for keymap item change button */
static void ui_keymap_but_cb(bContext *UNUSED(C), void *but_v, void *UNUSED(key_v))
{
    uiBut *but= but_v;

    RNA_boolean_set(&but->rnapoin, "shift", (but->modifier_key & KM_SHIFT) != 0);
    RNA_boolean_set(&but->rnapoin, "ctrl", (but->modifier_key & KM_CTRL) != 0);
    RNA_boolean_set(&but->rnapoin, "alt", (but->modifier_key & KM_ALT) != 0);
    RNA_boolean_set(&but->rnapoin, "oskey", (but->modifier_key & KM_OSKEY) != 0);
}

/* create label + button for RNA property */
static uiBut *ui_item_with_label(uiLayout *layout, uiBlock *block, const char *name, int icon, PointerRNA *ptr, PropertyRNA *prop, int index, int x, int y, int w, int h, int flag)
{
    uiLayout *sub;
    uiBut *but=NULL;
    PropertyType type;
    PropertySubType subtype;
    int labelw;

    sub= uiLayoutRow(layout, 0);
    uiBlockSetCurLayout(block, sub);

    if(name[0]) {
        /* XXX UI_GetStringWidth is not accurate
        labelw= UI_GetStringWidth(name);
        CLAMP(labelw, w/4, 3*w/4);*/
        labelw= w/3;
        uiDefBut(block, LABEL, 0, name, x, y, labelw, h, NULL, 0.0, 0.0, 0, 0, "");
        w= w-labelw;
    }

    type= RNA_property_type(prop);
    subtype= RNA_property_subtype(prop);

    if(subtype == PROP_FILEPATH || subtype == PROP_DIRPATH) {
        uiBlockSetCurLayout(block, uiLayoutRow(sub, 1));
        uiDefAutoButR(block, ptr, prop, index, "", icon, x, y, w-UI_UNIT_X, h);

        /* BUTTONS_OT_file_browse calls uiFileBrowseContextProperty */
        but= uiDefIconButO(block, BUT, subtype==PROP_DIRPATH ?
                               "BUTTONS_OT_directory_browse" :
                               "BUTTONS_OT_file_browse",
                           WM_OP_INVOKE_DEFAULT, ICON_FILESEL, x, y, UI_UNIT_X, h, NULL);
    }
    else if(flag & UI_ITEM_R_EVENT) {
        uiDefButR_prop(block, KEYEVT, 0, name, x, y, w, h, ptr, prop, index, 0, 0, -1, -1, NULL);
    }
    else if(flag & UI_ITEM_R_FULL_EVENT) {
        if(RNA_struct_is_a(ptr->type, &RNA_KeyMapItem)) {
            char buf[128];

            WM_keymap_item_to_string(ptr->data, buf, sizeof(buf));

            but= uiDefButR_prop(block, HOTKEYEVT, 0, buf, x, y, w, h, ptr, prop, 0, 0, 0, -1, -1, NULL);
            uiButSetFunc(but, ui_keymap_but_cb, but, NULL);
            if (flag & UI_ITEM_R_IMMEDIATE)
                uiButSetFlag(but, UI_BUT_IMMEDIATE);
        }
    }
    else
        but= uiDefAutoButR(block, ptr, prop, index, (type == PROP_ENUM && !(flag & UI_ITEM_R_ICON_ONLY))? NULL: "", icon, x, y, w, h);

    uiBlockSetCurLayout(block, layout);
    return but;
}

void uiFileBrowseContextProperty(const bContext *C, PointerRNA *ptr, PropertyRNA **prop)
{
    ARegion *ar= CTX_wm_region(C);
    uiBlock *block;
    uiBut *but, *prevbut;

    memset(ptr, 0, sizeof(*ptr));
    *prop= NULL;

    if(!ar)
        return;

    for(block=ar->uiblocks.first; block; block=block->next) {
        for(but=block->buttons.first; but; but= but->next) {
            prevbut= but->prev;

            /* find the button before the active one */
            if((but->flag & UI_BUT_LAST_ACTIVE) && prevbut && prevbut->rnapoin.data) {
                if(RNA_property_type(prevbut->rnaprop) == PROP_STRING) {
                    *ptr= prevbut->rnapoin;
                    *prop= prevbut->rnaprop;
                    return;
                }
            }
        }
    }
}

/********************* Button Items *************************/

/* disabled item */
static void ui_item_disabled(uiLayout *layout, const char *name)
{
    uiBlock *block= layout->root->block;
    uiBut *but;
    int w;

    uiBlockSetCurLayout(block, layout);

    if(!name)
        name= "";

    w= ui_text_icon_width(layout, name, 0, 0);

    but= uiDefBut(block, LABEL, 0, name, 0, 0, w, UI_UNIT_Y, NULL, 0.0, 0.0, 0, 0, "");
    but->flag |= UI_BUT_DISABLED;
    but->lock = 1;
    but->lockstr = "";
}

/* operator items */
PointerRNA uiItemFullO(uiLayout *layout, const char *opname, const char *name, int icon, IDProperty *properties, int context, int flag)
{
    uiBlock *block= layout->root->block;
    wmOperatorType *ot= WM_operatortype_find(opname, 1);
    uiBut *but;
    int w;

    if(!ot) {
        ui_item_disabled(layout, opname);
        RNA_warning("unknown operator '%s'", opname);
        return PointerRNA_NULL;
    }

    if(!name) {
        name= IFACE_(ot->name);
    }

    if(layout->root->type == UI_LAYOUT_MENU && !icon)
        icon= ICON_BLANK1;

    /* create button */
    uiBlockSetCurLayout(block, layout);

    w= ui_text_icon_width(layout, name, icon, 0);

    if (flag & UI_ITEM_R_NO_BG)
        uiBlockSetEmboss(block, UI_EMBOSSN);

    if(icon && name[0])
        but= uiDefIconTextButO(block, BUT, ot->idname, context, icon, name, 0, 0, w, UI_UNIT_Y, NULL);
    else if(icon)
        but= uiDefIconButO(block, BUT, ot->idname, context, icon, 0, 0, w, UI_UNIT_Y, NULL);
    else
        but= uiDefButO(block, BUT, ot->idname, context, name, 0, 0, w, UI_UNIT_Y, NULL);

    assert(but->optype != NULL);

    /* text alignment for toolbar buttons */
    if((layout->root->type == UI_LAYOUT_TOOLBAR) && !icon)
        but->flag |= UI_TEXT_LEFT;

    if (flag & UI_ITEM_R_NO_BG)
        uiBlockSetEmboss(block, UI_EMBOSS);

    if(layout->redalert)
        uiButSetFlag(but, UI_BUT_REDALERT);

    /* assign properties */
    if(properties || (flag & UI_ITEM_O_RETURN_PROPS)) {
        PointerRNA *opptr= uiButGetOperatorPtrRNA(but);

        if(properties) {
            opptr->data= properties;
        }
        else {
            IDPropertyTemplate val = {0};
            opptr->data= IDP_New(IDP_GROUP, &val, "wmOperatorProperties");
        }

        return *opptr;
    }

    return PointerRNA_NULL;
}

static const char *ui_menu_enumpropname(uiLayout *layout, const char *opname, const char *propname, int retval)
{
    wmOperatorType *ot= WM_operatortype_find(opname, 0);
    PointerRNA ptr;
    PropertyRNA *prop;

    if(!ot || !ot->srna)
        return "";

    RNA_pointer_create(NULL, ot->srna, NULL, &ptr);
    prop= RNA_struct_find_property(&ptr, propname);

    if(prop) {
        EnumPropertyItem *item;
        int totitem, free;
        const char *name;

        RNA_property_enum_items_gettexted(layout->root->block->evil_C, &ptr, prop, &item, &totitem, &free);
        if(RNA_enum_name(item, retval, &name)) {
            if(free) MEM_freeN(item);
            return name;
        }
        
        if(free)
            MEM_freeN(item);
    }

    return "";
}

void uiItemEnumO(uiLayout *layout, const char *opname, const char *name, int icon, const char *propname, int value)
{
    PointerRNA ptr;

    WM_operator_properties_create(&ptr, opname);
    RNA_enum_set(&ptr, propname, value);

    if(!name)
        name= ui_menu_enumpropname(layout, opname, propname, value);

    uiItemFullO(layout, opname, name, icon, ptr.data, layout->root->opcontext, 0);
}

void uiItemsFullEnumO(uiLayout *layout, const char *opname, const char *propname, IDProperty *properties, int context, int flag)
{
    wmOperatorType *ot= WM_operatortype_find(opname, 1);
    PointerRNA ptr;
    PropertyRNA *prop;
    uiBut *bt;
    uiBlock *block= layout->root->block;

    if(!ot || !ot->srna) {
        ui_item_disabled(layout, opname);
        RNA_warning("%s '%s'", ot ? "unknown operator" : "operator missing srna", opname);
        return;
    }

    RNA_pointer_create(NULL, ot->srna, NULL, &ptr);
    prop= RNA_struct_find_property(&ptr, propname);

    /* don't let bad properties slip through */
    BLI_assert((prop == NULL) || (RNA_property_type(prop) == PROP_ENUM));

    if(prop && RNA_property_type(prop) == PROP_ENUM) {
        EnumPropertyItem *item;
        int totitem, i, free;
        uiLayout *split= uiLayoutSplit(layout, 0, 0);
        uiLayout *column= uiLayoutColumn(split, 0);

        RNA_property_enum_items_gettexted(block->evil_C, &ptr, prop, &item, &totitem, &free);

        for(i=0; i<totitem; i++) {
            if(item[i].identifier[0]) {
                if(properties) {
                    PointerRNA tptr;

                    WM_operator_properties_create_ptr(&tptr, ot);
                    if(tptr.data) {
                        IDP_FreeProperty(tptr.data);
                        MEM_freeN(tptr.data);
                    }
                    tptr.data= IDP_CopyProperty(properties);
                    RNA_enum_set(&tptr, propname, item[i].value);

                    uiItemFullO(column, opname, item[i].name, item[i].icon, tptr.data, context, flag);
                }
                else
                    uiItemEnumO(column, opname, item[i].name, item[i].icon, propname, item[i].value);
            }
            else {
                if(item[i].name) {
                    if(i != 0) {
                        column= uiLayoutColumn(split, 0);
                        /* inconsistent, but menus with labels do not look good flipped */
                        block->flag |= UI_BLOCK_NO_FLIP;
                    }

                    uiItemL(column, item[i].name, ICON_NONE);
                    bt= block->buttons.last;
                    bt->flag= UI_TEXT_LEFT;
                }
                else /* XXX bug here, collums draw bottom item badly */
                    uiItemS(column);
            }
        }

        if(free)
            MEM_freeN(item);
    }
}

void uiItemsEnumO(uiLayout *layout, const char *opname, const char *propname)
{
    uiItemsFullEnumO(layout, opname, propname, NULL, layout->root->opcontext, 0);
}

/* for use in cases where we have */
void uiItemEnumO_value(uiLayout *layout, const char *name, int icon, const char *opname, const char *propname, int value)
{
    PointerRNA ptr;

    /* for getting the enum */
    PropertyRNA *prop;

    WM_operator_properties_create(&ptr, opname);

    /* enum lookup */
    if((prop= RNA_struct_find_property(&ptr, propname))) {
        /* pass */
    }
    else {
        RNA_warning("%s.%s not found", RNA_struct_identifier(ptr.type), propname);
        return;
    }

    RNA_property_enum_set(&ptr, prop, value);

    /* same as uiItemEnumO */
    if(!name)
        name= ui_menu_enumpropname(layout, opname, propname, value);

    uiItemFullO(layout, opname, name, icon, ptr.data, layout->root->opcontext, 0);
}

void uiItemEnumO_string(uiLayout *layout, const char *name, int icon, const char *opname, const char *propname, const char *value_str)
{
    PointerRNA ptr;
    
    /* for getting the enum */
    PropertyRNA *prop;
    EnumPropertyItem *item;
    int value, free;

    WM_operator_properties_create(&ptr, opname);
    
    /* enum lookup */
    if((prop= RNA_struct_find_property(&ptr, propname))) {
        RNA_property_enum_items_gettexted(layout->root->block->evil_C, &ptr, prop, &item, NULL, &free);
        if(item==NULL || RNA_enum_value_from_id(item, value_str, &value)==0) {
            if(free) MEM_freeN(item);
            RNA_warning("%s.%s, enum %s not found", RNA_struct_identifier(ptr.type), propname, value_str);
            return;
        }

        if(free)
            MEM_freeN(item);
    }
    else {
        RNA_warning("%s.%s not found", RNA_struct_identifier(ptr.type), propname);
        return;
    }
    
    RNA_property_enum_set(&ptr, prop, value);
    
    /* same as uiItemEnumO */
    if(!name)
        name= ui_menu_enumpropname(layout, opname, propname, value);

    uiItemFullO(layout, opname, name, icon, ptr.data, layout->root->opcontext, 0);
}

void uiItemBooleanO(uiLayout *layout, const char *name, int icon, const char *opname, const char *propname, int value)
{
    PointerRNA ptr;

    WM_operator_properties_create(&ptr, opname);
    RNA_boolean_set(&ptr, propname, value);

    uiItemFullO(layout, opname, name, icon, ptr.data, layout->root->opcontext, 0);
}

void uiItemIntO(uiLayout *layout, const char *name, int icon, const char *opname, const char *propname, int value)
{
    PointerRNA ptr;

    WM_operator_properties_create(&ptr, opname);
    RNA_int_set(&ptr, propname, value);

    uiItemFullO(layout, opname, name, icon, ptr.data, layout->root->opcontext, 0);
}

void uiItemFloatO(uiLayout *layout, const char *name, int icon, const char *opname, const char *propname, float value)
{
    PointerRNA ptr;

    WM_operator_properties_create(&ptr, opname);
    RNA_float_set(&ptr, propname, value);

    uiItemFullO(layout, opname, name, icon, ptr.data, layout->root->opcontext, 0);
}

void uiItemStringO(uiLayout *layout, const char *name, int icon, const char *opname, const char *propname, const char *value)
{
    PointerRNA ptr;

    WM_operator_properties_create(&ptr, opname);
    RNA_string_set(&ptr, propname, value);

    uiItemFullO(layout, opname, name, icon, ptr.data, layout->root->opcontext, 0);
}

void uiItemO(uiLayout *layout, const char *name, int icon, const char *opname)
{
    uiItemFullO(layout, opname, name, icon, NULL, layout->root->opcontext, 0);
}

/* RNA property items */

static void ui_item_rna_size(uiLayout *layout, const char *name, int icon, PointerRNA *ptr, PropertyRNA *prop, int index, int icon_only, int *r_w, int *r_h)
{
    PropertyType type;
    PropertySubType subtype;
    int len, w, h;

    /* arbitrary extended width by type */
    type= RNA_property_type(prop);
    subtype= RNA_property_subtype(prop);
    len= RNA_property_array_length(ptr, prop);

    if(ELEM3(type, PROP_STRING, PROP_POINTER, PROP_ENUM) && !name[0] && !icon_only)
        name= "non-empty text";
    else if(type == PROP_BOOLEAN && !name[0] && !icon_only)
        icon= ICON_DOT;

    w= ui_text_icon_width(layout, name, icon, 0);
    h= UI_UNIT_Y;

    /* increase height for arrays */
    if(index == RNA_NO_INDEX && len > 0) {
        if(!name[0] && icon == ICON_NONE)
            h= 0;

        if(ELEM(subtype, PROP_LAYER, PROP_LAYER_MEMBER))
            h += 2*UI_UNIT_Y;
        else if(subtype == PROP_MATRIX)
            h += ceil(sqrt(len))*UI_UNIT_Y;
        else
            h += len*UI_UNIT_Y;
    }
    else if(ui_layout_vary_direction(layout) == UI_ITEM_VARY_X) {
        if(type == PROP_BOOLEAN && name[0])
            w += UI_UNIT_X/5;
        else if(type == PROP_ENUM)
            w += UI_UNIT_X/4;
        else if(type == PROP_FLOAT || type == PROP_INT)
            w += UI_UNIT_X*3;
    }

    *r_w= w;
    *r_h= h;
}

void uiItemFullR(uiLayout *layout, PointerRNA *ptr, PropertyRNA *prop, int index, int value, int flag, const char *name, int icon)
{
    uiBlock *block= layout->root->block;
    uiBut *but;
    PropertyType type;
    char namestr[UI_MAX_NAME_STR];
    int len, is_array, w, h, slider, toggle, expand, icon_only, no_bg;

    uiBlockSetCurLayout(block, layout);

    /* retrieve info */
    type= RNA_property_type(prop);
    is_array= RNA_property_array_check(prop);
    len= (is_array) ? RNA_property_array_length(ptr, prop) : 0;

    /* set name and icon */
    if(!name)
        name= RNA_property_ui_name(prop);
    if(icon == ICON_NONE)
        icon= RNA_property_ui_icon(prop);
    
    if(ELEM4(type, PROP_INT, PROP_FLOAT, PROP_STRING, PROP_POINTER))
        name= ui_item_name_add_colon(name, namestr);
    else if(type == PROP_BOOLEAN && is_array && index == RNA_NO_INDEX)
        name= ui_item_name_add_colon(name, namestr);
    else if(type == PROP_ENUM && index != RNA_ENUM_VALUE)
        name= ui_item_name_add_colon(name, namestr);

    if(layout->root->type == UI_LAYOUT_MENU) {
        if(type == PROP_BOOLEAN && ((is_array == FALSE) || (index != RNA_NO_INDEX))) {
            if(is_array) icon= (RNA_property_boolean_get_index(ptr, prop, index)) ? ICON_CHECKBOX_HLT: ICON_CHECKBOX_DEHLT;
            else         icon= (RNA_property_boolean_get(ptr, prop)) ? ICON_CHECKBOX_HLT: ICON_CHECKBOX_DEHLT;
        }
        else if(type == PROP_ENUM && index == RNA_ENUM_VALUE) {
            int enum_value= RNA_property_enum_get(ptr, prop);
            if(RNA_property_flag(prop) & PROP_ENUM_FLAG) {
                icon= (enum_value & value)? ICON_CHECKBOX_HLT: ICON_CHECKBOX_DEHLT;
            }
            else {
                icon= (enum_value == value)? ICON_CHECKBOX_HLT: ICON_CHECKBOX_DEHLT;
            }
        }
    }

    slider= (flag & UI_ITEM_R_SLIDER);
    toggle= (flag & UI_ITEM_R_TOGGLE);
    expand= (flag & UI_ITEM_R_EXPAND);
    icon_only= (flag & UI_ITEM_R_ICON_ONLY);
    no_bg= (flag & UI_ITEM_R_NO_BG);

    /* get size */
    ui_item_rna_size(layout, name, icon, ptr, prop, index, icon_only, &w, &h);

    if (no_bg)
        uiBlockSetEmboss(block, UI_EMBOSSN);
    
    /* array property */
    if(index == RNA_NO_INDEX && is_array)
        ui_item_array(layout, block, name, icon, ptr, prop, len, 0, 0, w, h, expand, slider, toggle, icon_only);
    /* enum item */
    else if(type == PROP_ENUM && index == RNA_ENUM_VALUE) {
        if(icon && name[0] && !icon_only)
            uiDefIconTextButR_prop(block, ROW, 0, icon, name, 0, 0, w, h, ptr, prop, -1, 0, value, -1, -1, NULL);
        else if(icon)
            uiDefIconButR_prop(block, ROW, 0, icon, 0, 0, w, h, ptr, prop, -1, 0, value, -1, -1, NULL);
        else
            uiDefButR_prop(block, ROW, 0, name, 0, 0, w, h, ptr, prop, -1, 0, value, -1, -1, NULL);
    }
    /* expanded enum */
    else if(type == PROP_ENUM && (expand || RNA_property_flag(prop) & PROP_ENUM_FLAG))
        ui_item_enum_expand(layout, block, ptr, prop, name, h, icon_only);
    /* property with separate label */
    else if(type == PROP_ENUM || type == PROP_STRING || type == PROP_POINTER) {
        but= ui_item_with_label(layout, block, name, icon, ptr, prop, index, 0, 0, w, h, flag);
        ui_but_add_search(but, ptr, prop, NULL, NULL);
        
        if(layout->redalert)
            uiButSetFlag(but, UI_BUT_REDALERT);
    }
    /* single button */
    else {
        but= uiDefAutoButR(block, ptr, prop, index, name, icon, 0, 0, w, h);

        if(slider && but->type==NUM)
            but->type= NUMSLI;

        if(toggle && but->type==OPTION)
            but->type= TOG;
        
        if(layout->redalert)
            uiButSetFlag(but, UI_BUT_REDALERT);
    }
    
    if (no_bg)
        uiBlockSetEmboss(block, UI_EMBOSS);
}

void uiItemR(uiLayout *layout, PointerRNA *ptr, const char *propname, int flag, const char *name, int icon)
{
    PropertyRNA *prop= RNA_struct_find_property(ptr, propname);

    if(!prop) {
        ui_item_disabled(layout, propname);
        RNA_warning("property not found: %s.%s", RNA_struct_identifier(ptr->type), propname);
        return;
    }

    uiItemFullR(layout, ptr, prop, RNA_NO_INDEX, 0, flag, name, icon);
}

void uiItemEnumR(uiLayout *layout, const char *name, int icon, struct PointerRNA *ptr, const char *propname, int value)
{
    PropertyRNA *prop= RNA_struct_find_property(ptr, propname);

    if(!prop || RNA_property_type(prop) != PROP_ENUM) {
        ui_item_disabled(layout, propname);
        RNA_warning("property not found: %s.%s", RNA_struct_identifier(ptr->type), propname);
        return;
    }

    uiItemFullR(layout, ptr, prop, RNA_ENUM_VALUE, value, 0, name, icon);
}

void uiItemEnumR_string(uiLayout *layout, struct PointerRNA *ptr, const char *propname, const char *value, const char *name, int icon)
{
    PropertyRNA *prop= RNA_struct_find_property(ptr, propname);
    EnumPropertyItem *item;
    int ivalue, a, free;

    if(!prop || RNA_property_type(prop) != PROP_ENUM) {
        ui_item_disabled(layout, propname);
        RNA_warning("enum property not found: %s.%s", RNA_struct_identifier(ptr->type), propname);
        return;
    }

    RNA_property_enum_items_gettexted(layout->root->block->evil_C, ptr, prop, &item, NULL, &free);

    if(!RNA_enum_value_from_id(item, value, &ivalue)) {
        if(free) MEM_freeN(item);
        ui_item_disabled(layout, propname);
        RNA_warning("enum property value not found: %s", value);
        return;
    }

    for(a=0; item[a].identifier; a++) {
        if(item[a].value == ivalue) {
            uiItemFullR(layout, ptr, prop, RNA_ENUM_VALUE, ivalue, 0, name ? name : item[a].name, icon ? icon : item[a].icon);
            break;
        }
    }

    if(free)
        MEM_freeN(item);
}

void uiItemsEnumR(uiLayout *layout, struct PointerRNA *ptr, const char *propname)
{
    PropertyRNA *prop;
    uiBlock *block= layout->root->block;
    uiBut *bt;

    prop= RNA_struct_find_property(ptr, propname);

    if(!prop) {
        ui_item_disabled(layout, propname);
        RNA_warning("enum property not found: %s.%s", RNA_struct_identifier(ptr->type), propname);
        return;
    }

    if(RNA_property_type(prop) != PROP_ENUM) {
        RNA_warning("not an enum property: %s.%s", RNA_struct_identifier(ptr->type), propname);
        return;
    }
    else {
        EnumPropertyItem *item;
        int totitem, i, free;
        uiLayout *split= uiLayoutSplit(layout, 0, 0);
        uiLayout *column= uiLayoutColumn(split, 0);

        RNA_property_enum_items_gettexted(block->evil_C, ptr, prop, &item, &totitem, &free);

        for(i=0; i<totitem; i++) {
            if(item[i].identifier[0]) {
                uiItemEnumR(column, item[i].name, ICON_NONE, ptr, propname, item[i].value);
            }
            else {
                if(item[i].name) {
                    if(i != 0) {
                        column= uiLayoutColumn(split, 0);
                        /* inconsistent, but menus with labels do not look good flipped */
                        block->flag |= UI_BLOCK_NO_FLIP;
                    }

                    uiItemL(column, item[i].name, ICON_NONE);
                    bt= block->buttons.last;
                    bt->flag= UI_TEXT_LEFT;
                }
                else
                    uiItemS(column);
            }
        }

        if(free)
            MEM_freeN(item);
    }
}

/* Pointer RNA button with search */

typedef struct CollItemSearch {
    struct CollItemSearch *next, *prev;
    char *name;
    int index;
    int iconid;
} CollItemSearch;

static int sort_search_items_list(void *a, void *b)
{
    CollItemSearch *cis1 = (CollItemSearch *)a;
    CollItemSearch *cis2 = (CollItemSearch *)b;
    
    if (BLI_strcasecmp(cis1->name, cis2->name)>0)
        return 1;
    else
        return 0;
}

static void rna_search_cb(const struct bContext *C, void *arg_but, const char *str, uiSearchItems *items)
{
    uiBut *but= arg_but;
    char *name;
    int i=0, iconid=0, flag= RNA_property_flag(but->rnaprop);
    ListBase *items_list= MEM_callocN(sizeof(ListBase), "items_list");
    CollItemSearch *cis;
    const int skip_filter= !but->changed;

    /* build a temporary list of relevant items first */
    RNA_PROP_BEGIN(&but->rnasearchpoin, itemptr, but->rnasearchprop) {
        if(flag & PROP_ID_SELF_CHECK)
            if(itemptr.data == but->rnapoin.id.data)
                continue;

        /* use filter */
        if(RNA_property_type(but->rnaprop)==PROP_POINTER) {
            if(RNA_property_pointer_poll(&but->rnapoin, but->rnaprop, &itemptr)==0)
                continue;
        }

        if(itemptr.type && RNA_struct_is_ID(itemptr.type)) {
            ID *id= itemptr.data;
            char name_ui[MAX_ID_NAME];

#if 0       /* this name is used for a string comparison and can't be modified, TODO */
            name_uiprefix_id(name_ui, id);
#else
            BLI_strncpy(name_ui, id->name+2, sizeof(name_ui));
#endif
            name= BLI_strdup(name_ui);
            iconid= ui_id_icon_get((bContext*)C, id, 1);
        }
        else {
            name= RNA_struct_name_get_alloc(&itemptr, NULL, 0, NULL); /* could use the string length here */
            iconid = 0;
        }

        if(name) {
            if(skip_filter || BLI_strcasestr(name, str)) {
                cis = MEM_callocN(sizeof(CollItemSearch), "CollectionItemSearch");
                cis->name = MEM_dupallocN(name);
                cis->index = i;
                cis->iconid = iconid;
                BLI_addtail(items_list, cis);
            }
            MEM_freeN(name);
        }           

        i++;
    }
    RNA_PROP_END;
    
    BLI_sortlist(items_list, sort_search_items_list);
    
    /* add search items from temporary list */
    for (cis=items_list->first; cis; cis=cis->next) {
        if (!uiSearchItemAdd(items, cis->name, SET_INT_IN_POINTER(cis->index), cis->iconid)) {
            break;
        }
    }

    for (cis=items_list->first; cis; cis=cis->next) {
        MEM_freeN(cis->name);
    }
    BLI_freelistN(items_list);
    MEM_freeN(items_list);
}

static void search_id_collection(StructRNA *ptype, PointerRNA *ptr, PropertyRNA **prop)
{
    StructRNA *srna;

    /* look for collection property in Main */
    RNA_main_pointer_create(G.main, ptr);

    *prop= NULL;

    RNA_STRUCT_BEGIN(ptr, iprop) {
        /* if it's a collection and has same pointer type, we've got it */
        if(RNA_property_type(iprop) == PROP_COLLECTION) {
            srna= RNA_property_pointer_type(ptr, iprop);

            if(ptype == srna) {
                *prop= iprop;
                break;
            }
        }
    }
    RNA_STRUCT_END;
}

void ui_but_add_search(uiBut *but, PointerRNA *ptr, PropertyRNA *prop, PointerRNA *searchptr, PropertyRNA *searchprop)
{
    StructRNA *ptype;
    PointerRNA sptr;

    /* for ID's we do automatic lookup */
    if(!searchprop) {
        if(RNA_property_type(prop) == PROP_POINTER) {
            ptype= RNA_property_pointer_type(ptr, prop);
            search_id_collection(ptype, &sptr, &searchprop);
            searchptr= &sptr;
        }
    }

    /* turn button into search button */
    if(searchprop) {
        but->type= SEARCH_MENU;
        but->hardmax= MAX2(but->hardmax, 256);
        but->rnasearchpoin= *searchptr;
        but->rnasearchprop= searchprop;
        but->flag |= UI_ICON_LEFT|UI_TEXT_LEFT;

        uiButSetSearchFunc(but, rna_search_cb, but, NULL, NULL);
    }
}

void uiItemPointerR(uiLayout *layout, struct PointerRNA *ptr, const char *propname, struct PointerRNA *searchptr, const char *searchpropname, const char *name, int icon)
{
    PropertyRNA *prop, *searchprop;
    PropertyType type;
    uiBut *but;
    uiBlock *block;
    StructRNA *icontype;
    int w, h;
    
    /* validate arguments */
    prop= RNA_struct_find_property(ptr, propname);

    if(!prop) {
        RNA_warning("property not found: %s.%s", RNA_struct_identifier(ptr->type), propname);
        return;
    }
    
    type= RNA_property_type(prop);
    if(!ELEM(type, PROP_POINTER, PROP_STRING)) {
        RNA_warning("Property %s must be a pointer or string", propname);
        return;
    }

    searchprop= RNA_struct_find_property(searchptr, searchpropname);


    if(!searchprop) {
        RNA_warning("search collection property not found: %s.%s", RNA_struct_identifier(ptr->type), searchpropname);
        return;
    }
    else if (RNA_property_type(searchprop) != PROP_COLLECTION) {
        RNA_warning("search collection property is not a collection type: %s.%s", RNA_struct_identifier(ptr->type), searchpropname);
        return;
    }

    /* get icon & name */
    if(icon==ICON_NONE) {
        if(type == PROP_POINTER)
            icontype= RNA_property_pointer_type(ptr, prop);
        else
            icontype= RNA_property_pointer_type(searchptr, searchprop);

        icon= RNA_struct_ui_icon(icontype);
    }
    if(!name)
        name= RNA_property_ui_name(prop);

    /* create button */
    block= uiLayoutGetBlock(layout);

    ui_item_rna_size(layout, name, icon, ptr, prop, 0, 0, &w, &h);
    but= ui_item_with_label(layout, block, name, icon, ptr, prop, 0, 0, 0, w, h, 0);

    ui_but_add_search(but, ptr, prop, searchptr, searchprop);
}

/* menu item */
static void ui_item_menutype_func(bContext *C, uiLayout *layout, void *arg_mt)
{
    MenuType *mt= (MenuType*)arg_mt;
    Menu menu = {NULL};

    menu.type= mt;
    menu.layout= layout;
    mt->draw(C, &menu);
}

static void ui_item_menu(uiLayout *layout, const char *name, int icon, uiMenuCreateFunc func, void *arg, void *argN, const char *tip)
{
    uiBlock *block= layout->root->block;
    uiBut *but;
    int w, h;

    uiBlockSetCurLayout(block, layout);

    if(layout->root->type == UI_LAYOUT_HEADER)
        uiBlockSetEmboss(block, UI_EMBOSS);

    if(!name)
        name= "";
    if(layout->root->type == UI_LAYOUT_MENU && !icon)
        icon= ICON_BLANK1;

    w= ui_text_icon_width(layout, name, icon, 1);
    h= UI_UNIT_Y;

    if(layout->root->type == UI_LAYOUT_HEADER) /* ugly .. */
        w -= 10;

    if(name[0] && icon)
        but= uiDefIconTextMenuBut(block, func, arg, icon, name, 0, 0, w, h, tip);
    else if(icon)
        but= uiDefIconMenuBut(block, func, arg, icon, 0, 0, w, h, tip);
    else
        but= uiDefMenuBut(block, func, arg, name, 0, 0, w, h, tip);

    if(argN) { /* ugly .. */
        but->poin= (char*)but;
        but->func_argN= argN;
    }

    if(layout->root->type == UI_LAYOUT_HEADER)
        uiBlockSetEmboss(block, UI_EMBOSS);
    else if(ELEM(layout->root->type, UI_LAYOUT_PANEL, UI_LAYOUT_TOOLBAR)) {
        but->type= MENU;
        but->flag |= UI_TEXT_LEFT;
    }
}

void uiItemM(uiLayout *layout, bContext *UNUSED(C), const char *menuname, const char *name, int icon)
{
    MenuType *mt;

    mt= WM_menutype_find(menuname, FALSE);

    if(mt==NULL) {
        RNA_warning("not found %s", menuname);
        return;
    }

    if(!name) {
        name= IFACE_(mt->label);
    }

    if(layout->root->type == UI_LAYOUT_MENU && !icon)
        icon= ICON_BLANK1;

    ui_item_menu(layout, name, icon, ui_item_menutype_func, mt, NULL, mt->description);
}

/* label item */
static uiBut *uiItemL_(uiLayout *layout, const char *name, int icon)
{
    uiBlock *block= layout->root->block;
    uiBut *but;
    int w;

    uiBlockSetCurLayout(block, layout);

    if(!name)
        name= "";
    if(layout->root->type == UI_LAYOUT_MENU && !icon)
        icon= ICON_BLANK1;

    w= ui_text_icon_width(layout, name, icon, 0);

    if(icon && name[0])
        but= uiDefIconTextBut(block, LABEL, 0, icon, name, 0, 0, w, UI_UNIT_Y, NULL, 0.0, 0.0, 0, 0, "");
    else if(icon)
        but= uiDefIconBut(block, LABEL, 0, icon, 0, 0, w, UI_UNIT_Y, NULL, 0.0, 0.0, 0, 0, "");
    else
        but= uiDefBut(block, LABEL, 0, name, 0, 0, w, UI_UNIT_Y, NULL, 0.0, 0.0, 0, 0, "");
    
    return but;
}

void uiItemL(uiLayout *layout, const char *name, int icon)
{
    uiItemL_(layout, name, icon);
}

void uiItemLDrag(uiLayout *layout, PointerRNA *ptr, const char *name, int icon)
{
    uiBut *but= uiItemL_(layout, name, icon);

    if(ptr && ptr->type)
        if(RNA_struct_is_ID(ptr->type))
            uiButSetDragID(but, ptr->id.data);
}


/* value item */
void uiItemV(uiLayout *layout, const char *name, int icon, int argval)
{
    /* label */
    uiBlock *block= layout->root->block;
    float *retvalue= (block->handle)? &block->handle->retvalue: NULL;
    int w;

    uiBlockSetCurLayout(block, layout);

    if(!name)
        name= "";
    if(layout->root->type == UI_LAYOUT_MENU && !icon)
        icon= ICON_BLANK1;

    w= ui_text_icon_width(layout, name, icon, 0);

    if(icon && name[0])
        uiDefIconTextButF(block, BUT, argval, icon, name, 0, 0, w, UI_UNIT_Y, retvalue, 0.0, 0.0, 0, 0, "");
    else if(icon)
        uiDefIconButF(block, BUT, argval, icon, 0, 0, w, UI_UNIT_Y, retvalue, 0.0, 0.0, 0, 0, "");
    else
        uiDefButF(block, BUT, argval, name, 0, 0, w, UI_UNIT_Y, retvalue, 0.0, 0.0, 0, 0, "");
}

/* separator item */
void uiItemS(uiLayout *layout)
{
    uiBlock *block= layout->root->block;

    uiBlockSetCurLayout(block, layout);
    uiDefBut(block, SEPR, 0, "", 0, 0, EM_SEPR_X, EM_SEPR_Y, NULL, 0.0, 0.0, 0, 0, "");
}

/* level items */
void uiItemMenuF(uiLayout *layout, const char *name, int icon, uiMenuCreateFunc func, void *arg)
{
    if(!func)
        return;

    ui_item_menu(layout, name, icon, func, arg, NULL, "");
}

typedef struct MenuItemLevel {
    int opcontext;
    /* dont use pointers to the strings because python can dynamically
     * allocate strings and free before the menu draws, see [#27304] */
    char opname[OP_MAX_TYPENAME];
    char propname[MAX_IDPROP_NAME];
    PointerRNA rnapoin;
} MenuItemLevel;

static void menu_item_enum_opname_menu(bContext *UNUSED(C), uiLayout *layout, void *arg)
{
    MenuItemLevel *lvl= (MenuItemLevel*)(((uiBut*)arg)->func_argN);

    uiLayoutSetOperatorContext(layout, lvl->opcontext);
    uiItemsEnumO(layout, lvl->opname, lvl->propname);
}

void uiItemMenuEnumO(uiLayout *layout, const char *opname, const char *propname, const char *name, int icon)
{
    wmOperatorType *ot= WM_operatortype_find(opname, 1);
    MenuItemLevel *lvl;

    if(!ot) {
        ui_item_disabled(layout, opname);
        RNA_warning("unknown operator '%s'", opname);
        return;
    }
    if(!ot->srna) {
        ui_item_disabled(layout, opname);
        RNA_warning("operator missing srna '%s'", opname);
        return;
    }

    if(!name)
        name= ot->name;
    if(layout->root->type == UI_LAYOUT_MENU && !icon)
        icon= ICON_BLANK1;

    lvl= MEM_callocN(sizeof(MenuItemLevel), "MenuItemLevel");
    BLI_strncpy(lvl->opname, opname, sizeof(lvl->opname));
    BLI_strncpy(lvl->propname, propname, sizeof(lvl->propname));
    lvl->opcontext= layout->root->opcontext;

    ui_item_menu(layout, name, icon, menu_item_enum_opname_menu, NULL, lvl, ot->description);
}

static void menu_item_enum_rna_menu(bContext *UNUSED(C), uiLayout *layout, void *arg)
{
    MenuItemLevel *lvl= (MenuItemLevel*)(((uiBut*)arg)->func_argN);

    uiLayoutSetOperatorContext(layout, lvl->opcontext);
    uiItemsEnumR(layout, &lvl->rnapoin, lvl->propname);
}

void uiItemMenuEnumR(uiLayout *layout, struct PointerRNA *ptr, const char *propname, const char *name, int icon)
{
    MenuItemLevel *lvl;
    PropertyRNA *prop;

    prop= RNA_struct_find_property(ptr, propname);
    if(!prop) {
        ui_item_disabled(layout, propname);
        RNA_warning("property not found: %s.%s", RNA_struct_identifier(ptr->type), propname);
        return;
    }

    if(!name)
        name= RNA_property_ui_name(prop);
    if(layout->root->type == UI_LAYOUT_MENU && !icon)
        icon= ICON_BLANK1;

    lvl= MEM_callocN(sizeof(MenuItemLevel), "MenuItemLevel");
    lvl->rnapoin= *ptr;
    BLI_strncpy(lvl->propname, propname, sizeof(lvl->propname));
    lvl->opcontext= layout->root->opcontext;

    ui_item_menu(layout, name, icon, menu_item_enum_rna_menu, NULL, lvl, RNA_property_description(prop));
}

/**************************** Layout Items ***************************/

/* single-row layout */
static void ui_litem_estimate_row(uiLayout *litem)
{
    uiItem *item;
    int itemw, itemh;

    litem->w= 0;
    litem->h= 0;

    for(item=litem->items.first; item; item=item->next) {
        ui_item_size(item, &itemw, &itemh);

        litem->w += itemw;
        litem->h= MAX2(itemh, litem->h);

        if(item->next)
            litem->w += litem->space;
    }
}

static int ui_litem_min_width(int itemw)
{
    return MIN2(2*UI_UNIT_X, itemw);
}

static void ui_litem_layout_row(uiLayout *litem)
{
    uiItem *item;
    int x, y, w, tot, totw, neww, itemw, minw, itemh, offset;
    int fixedw, freew, fixedx, freex, flag= 0, lastw= 0;

    /* x= litem->x; */ /* UNUSED */
    y= litem->y;
    w= litem->w;
    totw= 0;
    tot= 0;

    for(item=litem->items.first; item; item=item->next) {
        ui_item_size(item, &itemw, &itemh);
        totw += itemw;
        tot++;
    }

    if(totw == 0)
        return;
    
    if(w != 0)
        w -= (tot-1)*litem->space;
    fixedw= 0;

    /* keep clamping items to fixed minimum size until all are done */
    do {
        freew= 0;
        x= 0;
        flag= 0;

        for(item=litem->items.first; item; item=item->next) {
            if(item->flag)
                continue;

            ui_item_size(item, &itemw, &itemh);
            minw= ui_litem_min_width(itemw);

            if(w - lastw > 0)
                neww= ui_item_fit(itemw, x, totw, w-lastw, !item->next, litem->alignment, NULL);
            else
                neww= 0; /* no space left, all will need clamping to minimum size */

            x += neww;

            if((neww < minw || itemw == minw) && w != 0) {
                /* fixed size */
                item->flag= 1;
                fixedw += minw;
                flag= 1;
                totw -= itemw;
            }
            else {
                /* keep free size */
                item->flag= 0;
                freew += itemw;
            }
        }

        lastw= fixedw;
    } while(flag);

    freex= 0;
    fixedx= 0;
    x= litem->x;

    for(item=litem->items.first; item; item=item->next) {
        ui_item_size(item, &itemw, &itemh);
        minw= ui_litem_min_width(itemw);

        if(item->flag) {
            /* fixed minimum size items */
            itemw= ui_item_fit(minw, fixedx, fixedw, MIN2(w, fixedw), !item->next, litem->alignment, NULL);
            fixedx += itemw;
        }
        else {
            /* free size item */
            itemw= ui_item_fit(itemw, freex, freew, w-fixedw, !item->next, litem->alignment, NULL);
            freex += itemw;
        }

        /* align right/center */
        offset= 0;
        if(litem->alignment == UI_LAYOUT_ALIGN_RIGHT) {
            if(freew > 0 && freew < w-fixedw)
                offset= (w - fixedw) - freew;
        }
        else if(litem->alignment == UI_LAYOUT_ALIGN_CENTER) {
            if(freew > 0 && freew < w-fixedw)
                offset= ((w - fixedw) - freew)/2;
        }

        /* position item */
        ui_item_position(item, x+offset, y-itemh, itemw, itemh);

        x += itemw;
        if(item->next)
            x += litem->space;
    }

    litem->w= x - litem->x;
    litem->h= litem->y - y;
    litem->x= x;
    litem->y= y;
}

/* single-column layout */
static void ui_litem_estimate_column(uiLayout *litem)
{
    uiItem *item;
    int itemw, itemh;

    litem->w= 0;
    litem->h= 0;

    for(item=litem->items.first; item; item=item->next) {
        ui_item_size(item, &itemw, &itemh);

        litem->w= MAX2(litem->w, itemw);
        litem->h += itemh;

        if(item->next)
            litem->h += litem->space;
    }
}

static void ui_litem_layout_column(uiLayout *litem)
{
    uiItem *item;
    int itemh, x, y;

    x= litem->x;
    y= litem->y;

    for(item=litem->items.first; item; item=item->next) {
        ui_item_size(item, NULL, &itemh);

        y -= itemh;
        ui_item_position(item, x, y, litem->w, itemh);

        if(item->next)
            y -= litem->space;
    }

    litem->h= litem->y - y;
    litem->x= x;
    litem->y= y;
}

/* root layout */
static void ui_litem_estimate_root(uiLayout *UNUSED(litem))
{
    /* nothing to do */
}

static void ui_litem_layout_root(uiLayout *litem)
{
    if(litem->root->type == UI_LAYOUT_HEADER)
        ui_litem_layout_row(litem);
    else
        ui_litem_layout_column(litem);
}

/* box layout */
static void ui_litem_estimate_box(uiLayout *litem)
{
    uiStyle *style= litem->root->style;

    ui_litem_estimate_column(litem);
    litem->w += 2*style->boxspace;
    litem->h += style->boxspace;
}

static void ui_litem_layout_box(uiLayout *litem)
{
    uiLayoutItemBx *box= (uiLayoutItemBx*)litem;
    uiStyle *style= litem->root->style;
    uiBut *but;
    int w, h;

    w= litem->w;
    h= litem->h;

    litem->x += style->boxspace;

    if(w != 0) litem->w -= 2*style->boxspace;
    if(h != 0) litem->h -= 2*style->boxspace;

    ui_litem_layout_column(litem);

    litem->x -= style->boxspace;
    litem->y -= style->boxspace;

    if(w != 0) litem->w += 2*style->boxspace;
    if(h != 0) litem->h += style->boxspace;

    /* roundbox around the sublayout */
    but= box->roundbox;
    but->x1= litem->x;
    but->y1= litem->y;
    but->x2= litem->x+litem->w;
    but->y2= litem->y+litem->h;
}

/* multi-column layout, automatically flowing to the next */
static void ui_litem_estimate_column_flow(uiLayout *litem)
{
    uiStyle *style= litem->root->style;
    uiLayoutItemFlow *flow= (uiLayoutItemFlow*)litem;
    uiItem *item;
    int col, x, y, emh, emy, miny, itemw, itemh, maxw=0;
    int toth, totitem;

    /* compute max needed width and total height */
    toth= 0;
    totitem= 0;
    for(item=litem->items.first; item; item=item->next) {
        ui_item_size(item, &itemw, &itemh);
        maxw= MAX2(maxw, itemw);
        toth += itemh;
        totitem++;
    }

    if(flow->number <= 0) {
        /* auto compute number of columns, not very good */
        if(maxw == 0) {
            flow->totcol= 1;
            return;
        }

        flow->totcol= MAX2(litem->root->emw/maxw, 1);
        flow->totcol= MIN2(flow->totcol, totitem);
    }
    else
        flow->totcol= flow->number;

    /* compute sizes */
    x= 0;
    y= 0;
    emy= 0;
    miny= 0;

    maxw= 0;
    emh= toth/flow->totcol;

    /* create column per column */
    col= 0;
    for(item=litem->items.first; item; item=item->next) {
        ui_item_size(item, &itemw, &itemh);

        y -= itemh + style->buttonspacey;
        miny= MIN2(miny, y);
        emy -= itemh;
        maxw= MAX2(itemw, maxw);

        /* decide to go to next one */
        if(col < flow->totcol-1 && emy <= -emh) {
            x += maxw + litem->space;
            maxw= 0;
            y= 0;
            col++;
        }
    }

    litem->w= x;
    litem->h= litem->y - miny;
}

static void ui_litem_layout_column_flow(uiLayout *litem)
{
    uiStyle *style= litem->root->style;
    uiLayoutItemFlow *flow= (uiLayoutItemFlow*)litem;
    uiItem *item;
    int col, x, y, w, emh, emy, miny, itemw, itemh;
    int toth, totitem, offset;

    /* compute max needed width and total height */
    toth= 0;
    totitem= 0;
    for(item=litem->items.first; item; item=item->next) {
        ui_item_size(item, &itemw, &itemh);
        toth += itemh;
        totitem++;
    }

    /* compute sizes */
    x= litem->x;
    y= litem->y;
    emy= 0;
    miny= 0;

    w= litem->w - (flow->totcol-1)*style->columnspace;
    emh= toth/flow->totcol;

    /* create column per column */
    col= 0;
    for(item=litem->items.first; item; item=item->next) {
        ui_item_size(item, NULL, &itemh);
        itemw= ui_item_fit(1, x-litem->x, flow->totcol, w, col == flow->totcol-1, litem->alignment, &offset);
    
        y -= itemh;
        emy -= itemh;
        ui_item_position(item, x+offset, y, itemw, itemh);
        y -= style->buttonspacey;
        miny= MIN2(miny, y);

        /* decide to go to next one */
        if(col < flow->totcol-1 && emy <= -emh) {
            x += itemw + style->columnspace;
            y= litem->y;
            col++;
        }
    }

    litem->h= litem->y - miny;
    litem->x= x;
    litem->y= miny;
}

/* free layout */
static void ui_litem_estimate_absolute(uiLayout *litem)
{
    uiItem *item;
    int itemx, itemy, itemw, itemh, minx, miny;

    minx= 1e6;
    miny= 1e6;
    litem->w= 0;
    litem->h= 0;

    for(item=litem->items.first; item; item=item->next) {
        ui_item_offset(item, &itemx, &itemy);
        ui_item_size(item, &itemw, &itemh);

        minx= MIN2(minx, itemx);
        miny= MIN2(miny, itemy);

        litem->w= MAX2(litem->w, itemx+itemw);
        litem->h= MAX2(litem->h, itemy+itemh);
    }

    litem->w -= minx;
    litem->h -= miny;
}

static void ui_litem_layout_absolute(uiLayout *litem)
{
    uiItem *item;
    float scalex=1.0f, scaley=1.0f;
    int x, y, newx, newy, itemx, itemy, itemh, itemw, minx, miny, totw, toth;

    minx= 1e6;
    miny= 1e6;
    totw= 0;
    toth= 0;

    for(item=litem->items.first; item; item=item->next) {
        ui_item_offset(item, &itemx, &itemy);
        ui_item_size(item, &itemw, &itemh);

        minx= MIN2(minx, itemx);
        miny= MIN2(miny, itemy);

        totw= MAX2(totw, itemx+itemw);
        toth= MAX2(toth, itemy+itemh);
    }

    totw -= minx;
    toth -= miny;

    if(litem->w && totw > 0)
        scalex= (float)litem->w/(float)totw;
    if(litem->h && toth > 0)
        scaley= (float)litem->h/(float)toth;
    
    x= litem->x;
    y= litem->y - scaley*toth;

    for(item=litem->items.first; item; item=item->next) {
        ui_item_offset(item, &itemx, &itemy);
        ui_item_size(item, &itemw, &itemh);

        if(scalex != 1.0f) {
            newx= (itemx - minx)*scalex;
            itemw= (itemx - minx + itemw)*scalex - newx;
            itemx= minx + newx;
        }

        if(scaley != 1.0f) {
            newy= (itemy - miny)*scaley;
            itemh= (itemy - miny + itemh)*scaley - newy;
            itemy= miny + newy;
        }

        ui_item_position(item, x+itemx-minx, y+itemy-miny, itemw, itemh);
    }

    litem->w= scalex*totw;
    litem->h= litem->y - y;
    litem->x= x + litem->w;
    litem->y= y;
}

/* split layout */
static void ui_litem_estimate_split(uiLayout *litem)
{
    ui_litem_estimate_row(litem);
}

static void ui_litem_layout_split(uiLayout *litem)
{
    uiLayoutItemSplit *split= (uiLayoutItemSplit*)litem;
    uiItem *item;
    float percentage;
    const int tot= BLI_countlist(&litem->items);
    int itemh, x, y, w, colw=0;

    if(tot == 0)
        return;

    x= litem->x;
    y= litem->y;

    percentage= (split->percentage == 0.0f)? 1.0f/(float)tot: split->percentage;
    
    w= (litem->w - (tot-1)*litem->space);
    colw= w*percentage;
    colw= MAX2(colw, 0);

    for(item=litem->items.first; item; item=item->next) {
        ui_item_size(item, NULL, &itemh);

        ui_item_position(item, x, y-itemh, colw, itemh);
        x += colw;

        if(item->next) {
            colw= (w - (int)(w*percentage))/(tot-1);
            colw= MAX2(colw, 0);

            x += litem->space;
        }
    }

    litem->w= x - litem->x;
    litem->h= litem->y - y;
    litem->x= x;
    litem->y= y;
}

/* overlap layout */
static void ui_litem_estimate_overlap(uiLayout *litem)
{
    uiItem *item;
    int itemw, itemh;

    litem->w= 0;
    litem->h= 0;

    for(item=litem->items.first; item; item=item->next) {
        ui_item_size(item, &itemw, &itemh);

        litem->w= MAX2(itemw, litem->w);
        litem->h= MAX2(itemh, litem->h);
    }
}

static void ui_litem_layout_overlap(uiLayout *litem)
{
    uiItem *item;
    int itemw, itemh, x, y;

    x= litem->x;
    y= litem->y;

    for(item=litem->items.first; item; item=item->next) {
        ui_item_size(item, &itemw, &itemh);
        ui_item_position(item, x, y-itemh, litem->w, itemh);

        litem->h= MAX2(litem->h, itemh);
    }

    litem->x= x;
    litem->y= y - litem->h;
}

/* layout create functions */
uiLayout *uiLayoutRow(uiLayout *layout, int align)
{
    uiLayout *litem;

    litem= MEM_callocN(sizeof(uiLayout), "uiLayoutRow");
    litem->item.type= ITEM_LAYOUT_ROW;
    litem->root= layout->root;
    litem->align= align;
    litem->active= 1;
    litem->enabled= 1;
    litem->context= layout->context;
    litem->space= (align)? 0: layout->root->style->buttonspacex;
    litem->w = layout->w;
    BLI_addtail(&layout->items, litem);

    uiBlockSetCurLayout(layout->root->block, litem);

    return litem;
}

uiLayout *uiLayoutColumn(uiLayout *layout, int align)
{
    uiLayout *litem;

    litem= MEM_callocN(sizeof(uiLayout), "uiLayoutColumn");
    litem->item.type= ITEM_LAYOUT_COLUMN;
    litem->root= layout->root;
    litem->align= align;
    litem->active= 1;
    litem->enabled= 1;
    litem->context= layout->context;
    litem->space= (litem->align)? 0: layout->root->style->buttonspacey;
    litem->w = layout->w;
    BLI_addtail(&layout->items, litem);

    uiBlockSetCurLayout(layout->root->block, litem);

    return litem;
}

uiLayout *uiLayoutColumnFlow(uiLayout *layout, int number, int align)
{
    uiLayoutItemFlow *flow;

    flow= MEM_callocN(sizeof(uiLayoutItemFlow), "uiLayoutItemFlow");
    flow->litem.item.type= ITEM_LAYOUT_COLUMN_FLOW;
    flow->litem.root= layout->root;
    flow->litem.align= align;
    flow->litem.active= 1;
    flow->litem.enabled= 1;
    flow->litem.context= layout->context;
    flow->litem.space= (flow->litem.align)? 0: layout->root->style->columnspace;
    flow->litem.w = layout->w;
    flow->number= number;
    BLI_addtail(&layout->items, flow);

    uiBlockSetCurLayout(layout->root->block, &flow->litem);

    return &flow->litem;
}

static uiLayoutItemBx *ui_layout_box(uiLayout *layout, int type)
{
    uiLayoutItemBx *box;

    box= MEM_callocN(sizeof(uiLayoutItemBx), "uiLayoutItemBx");
    box->litem.item.type= ITEM_LAYOUT_BOX;
    box->litem.root= layout->root;
    box->litem.active= 1;
    box->litem.enabled= 1;
    box->litem.context= layout->context;
    box->litem.space= layout->root->style->columnspace;
    box->litem.w = layout->w;
    BLI_addtail(&layout->items, box);

    uiBlockSetCurLayout(layout->root->block, &box->litem);

    box->roundbox= uiDefBut(layout->root->block, type, 0, "", 0, 0, 0, 0, NULL, 0.0, 0.0, 0, 0, "");

    return box;
}

uiLayout *uiLayoutBox(uiLayout *layout)
{
    return (uiLayout*)ui_layout_box(layout, ROUNDBOX);
}

uiLayout *uiLayoutListBox(uiLayout *layout, PointerRNA *ptr, PropertyRNA *prop, PointerRNA *actptr, PropertyRNA *actprop)
{
    uiLayoutItemBx *box= ui_layout_box(layout, LISTBOX);
    uiBut *but= box->roundbox;

    but->rnasearchpoin= *ptr;
    but->rnasearchprop= prop;
    but->rnapoin= *actptr;
    but->rnaprop= actprop;

    return (uiLayout*)box;
}

uiLayout *uiLayoutAbsolute(uiLayout *layout, int align)
{
    uiLayout *litem;

    litem= MEM_callocN(sizeof(uiLayout), "uiLayoutAbsolute");
    litem->item.type= ITEM_LAYOUT_ABSOLUTE;
    litem->root= layout->root;
    litem->align= align;
    litem->active= 1;
    litem->enabled= 1;
    litem->context= layout->context;
    BLI_addtail(&layout->items, litem);

    uiBlockSetCurLayout(layout->root->block, litem);

    return litem;
}

uiBlock *uiLayoutAbsoluteBlock(uiLayout *layout)
{
    uiBlock *block;

    block= uiLayoutGetBlock(layout);
    uiLayoutAbsolute(layout, 0);

    return block;
}

uiLayout *uiLayoutOverlap(uiLayout *layout)
{
    uiLayout *litem;

    litem= MEM_callocN(sizeof(uiLayout), "uiLayoutOverlap");
    litem->item.type= ITEM_LAYOUT_OVERLAP;
    litem->root= layout->root;
    litem->active= 1;
    litem->enabled= 1;
    litem->context= layout->context;
    BLI_addtail(&layout->items, litem);

    uiBlockSetCurLayout(layout->root->block, litem);

    return litem;
}

uiLayout *uiLayoutSplit(uiLayout *layout, float percentage, int align)
{
    uiLayoutItemSplit *split;

    split= MEM_callocN(sizeof(uiLayoutItemSplit), "uiLayoutItemSplit");
    split->litem.item.type= ITEM_LAYOUT_SPLIT;
    split->litem.root= layout->root;
    split->litem.align= align;
    split->litem.active= 1;
    split->litem.enabled= 1;
    split->litem.context= layout->context;
    split->litem.space= layout->root->style->columnspace;
    split->litem.w= layout->w;
    split->percentage= percentage;
    BLI_addtail(&layout->items, split);

    uiBlockSetCurLayout(layout->root->block, &split->litem);

    return &split->litem;
}

void uiLayoutSetActive(uiLayout *layout, int active)
{
    layout->active= active;
}

void uiLayoutSetEnabled(uiLayout *layout, int enabled)
{
    layout->enabled= enabled;
}

void uiLayoutSetRedAlert(uiLayout *layout, int redalert)
{
    layout->redalert= redalert;
}

void uiLayoutSetKeepAspect(uiLayout *layout, int keepaspect)
{
    layout->keepaspect= keepaspect;
}

void uiLayoutSetAlignment(uiLayout *layout, int alignment)
{
    layout->alignment= alignment;
}

void uiLayoutSetScaleX(uiLayout *layout, float scale)
{
    layout->scale[0]= scale;
}

void uiLayoutSetScaleY(uiLayout *layout, float scale)
{
    layout->scale[1]= scale;
}

int uiLayoutGetActive(uiLayout *layout)
{
    return layout->active;
}

int uiLayoutGetEnabled(uiLayout *layout)
{
    return layout->enabled;
}

int uiLayoutGetRedAlert(uiLayout *layout)
{
    return layout->redalert;
}

int uiLayoutGetKeepAspect(uiLayout *layout)
{
    return layout->keepaspect;
}

int uiLayoutGetAlignment(uiLayout *layout)
{
    return layout->alignment;
}

int uiLayoutGetWidth(uiLayout *layout)
{
    return layout->w;
}

float uiLayoutGetScaleX(uiLayout *layout)
{
    return layout->scale[0];
}

float uiLayoutGetScaleY(uiLayout *layout)
{
    return layout->scale[0];
}

/********************** Layout *******************/

static void ui_item_scale(uiLayout *litem, float scale[2])
{
    uiItem *item;
    int x, y, w, h;

    for(item=litem->items.last; item; item=item->prev) {
        ui_item_size(item, &w, &h);
        ui_item_offset(item, &x, &y);

        if(scale[0] != 0.0f) {
            x *= scale[0];
            w *= scale[0];
        }

        if(scale[1] != 0.0f) {
            y *= scale[1];
            h *= scale[1];
        }

        ui_item_position(item, x, y, w, h);
    }
}

static void ui_item_estimate(uiItem *item)
{
    uiItem *subitem;

    if(item->type != ITEM_BUTTON) {
        uiLayout *litem= (uiLayout*)item;

        for(subitem=litem->items.first; subitem; subitem=subitem->next)
            ui_item_estimate(subitem);

        if(litem->items.first == NULL)
            return;

        if(litem->scale[0] != 0.0f || litem->scale[1] != 0.0f)
            ui_item_scale(litem, litem->scale);

        switch(litem->item.type) {
            case ITEM_LAYOUT_COLUMN:
                ui_litem_estimate_column(litem);
                break;
            case ITEM_LAYOUT_COLUMN_FLOW:
                ui_litem_estimate_column_flow(litem);
                break;
            case ITEM_LAYOUT_ROW:
                ui_litem_estimate_row(litem);
                break;
            case ITEM_LAYOUT_BOX:
                ui_litem_estimate_box(litem);
                break;
            case ITEM_LAYOUT_ROOT:
                ui_litem_estimate_root(litem);
                break;
            case ITEM_LAYOUT_ABSOLUTE:
                ui_litem_estimate_absolute(litem);
                break;
            case ITEM_LAYOUT_SPLIT:
                ui_litem_estimate_split(litem);
                break;
            case ITEM_LAYOUT_OVERLAP:
                ui_litem_estimate_overlap(litem);
                break;
            default:
                break;
        }
    }
}

static void ui_item_align(uiLayout *litem, short nr)
{
    uiItem *item;
    uiButtonItem *bitem;
    uiLayoutItemBx *box;

    for(item=litem->items.last; item; item=item->prev) {
        if(item->type == ITEM_BUTTON) {
            bitem= (uiButtonItem*)item;
            if(ui_but_can_align(bitem->but))
                if(!bitem->but->alignnr)
                    bitem->but->alignnr= nr;
        }
        else if(item->type == ITEM_LAYOUT_ABSOLUTE);
        else if(item->type == ITEM_LAYOUT_OVERLAP);
        else if(item->type == ITEM_LAYOUT_BOX) {
            box= (uiLayoutItemBx*)item;
            box->roundbox->alignnr= nr;
            BLI_remlink(&litem->root->block->buttons, box->roundbox);
            BLI_addhead(&litem->root->block->buttons, box->roundbox);
        }
        else
            ui_item_align((uiLayout*)item, nr);
    }
}

static void ui_item_flag(uiLayout *litem, int flag)
{
    uiItem *item;
    uiButtonItem *bitem;

    for(item=litem->items.last; item; item=item->prev) {
        if(item->type == ITEM_BUTTON) {
            bitem= (uiButtonItem*)item;
            bitem->but->flag |= flag;
        }
        else
            ui_item_flag((uiLayout*)item, flag);
    }
}

static void ui_item_layout(uiItem *item)
{
    uiItem *subitem;

    if(item->type != ITEM_BUTTON) {
        uiLayout *litem= (uiLayout*)item;

        if(litem->items.first == NULL)
            return;

        if(litem->align)
            ui_item_align(litem, ++litem->root->block->alignnr);
        if(!litem->active)
            ui_item_flag(litem, UI_BUT_INACTIVE);
        if(!litem->enabled)
            ui_item_flag(litem, UI_BUT_DISABLED);

        switch(litem->item.type) {
            case ITEM_LAYOUT_COLUMN:
                ui_litem_layout_column(litem);
                break;
            case ITEM_LAYOUT_COLUMN_FLOW:
                ui_litem_layout_column_flow(litem);
                break;
            case ITEM_LAYOUT_ROW:
                ui_litem_layout_row(litem);
                break;
            case ITEM_LAYOUT_BOX:
                ui_litem_layout_box(litem);
                break;
            case ITEM_LAYOUT_ROOT:
                ui_litem_layout_root(litem);
                break;
            case ITEM_LAYOUT_ABSOLUTE:
                ui_litem_layout_absolute(litem);
                break;
            case ITEM_LAYOUT_SPLIT:
                ui_litem_layout_split(litem);
                break;
            case ITEM_LAYOUT_OVERLAP:
                ui_litem_layout_overlap(litem);
                break;
            default:
                break;
        }

        for(subitem=litem->items.first; subitem; subitem=subitem->next)
            ui_item_layout(subitem);
    }
}

static void ui_layout_end(uiBlock *block, uiLayout *layout, int *x, int *y)
{
    if(layout->root->handlefunc)
        uiBlockSetHandleFunc(block, layout->root->handlefunc, layout->root->argv);

    ui_item_estimate(&layout->item);
    ui_item_layout(&layout->item);

    if(x) *x= layout->x;
    if(y) *y= layout->y;
}

static void ui_layout_free(uiLayout *layout)
{
    uiItem *item, *next;

    for(item=layout->items.first; item; item=next) {
        next= item->next;

        if(item->type == ITEM_BUTTON)
            MEM_freeN(item);
        else
            ui_layout_free((uiLayout*)item);
    }

    MEM_freeN(layout);
}

uiLayout *uiBlockLayout(uiBlock *block, int dir, int type, int x, int y, int size, int em, uiStyle *style)
{
    uiLayout *layout;
    uiLayoutRoot *root;

    root= MEM_callocN(sizeof(uiLayoutRoot), "uiLayoutRoot");
    root->type= type;
    root->style= style;
    root->block= block;
    root->opcontext= WM_OP_INVOKE_REGION_WIN;

    layout= MEM_callocN(sizeof(uiLayout), "uiLayout");
    layout->item.type= ITEM_LAYOUT_ROOT;

    layout->x= x;
    layout->y= y;
    layout->root= root;
    layout->space= style->templatespace;
    layout->active= 1;
    layout->enabled= 1;
    layout->context= NULL;

    if(type == UI_LAYOUT_MENU)
        layout->space= 0;

    if(dir == UI_LAYOUT_HORIZONTAL) {
        layout->h= size;
        layout->root->emh= em*UI_UNIT_Y;
    }
    else {
        layout->w= size;
        layout->root->emw= em*UI_UNIT_X;
    }

    block->curlayout= layout;
    root->layout= layout;
    BLI_addtail(&block->layouts, root);
    
    return layout;
}

uiBlock *uiLayoutGetBlock(uiLayout *layout)
{
    return layout->root->block;
}

int uiLayoutGetOperatorContext(uiLayout *layout)
{
    return layout->root->opcontext;
}


void uiBlockSetCurLayout(uiBlock *block, uiLayout *layout)
{
    block->curlayout= layout;
}

void ui_layout_add_but(uiLayout *layout, uiBut *but)
{
    uiButtonItem *bitem;
    
    bitem= MEM_callocN(sizeof(uiButtonItem), "uiButtonItem");
    bitem->item.type= ITEM_BUTTON;
    bitem->but= but;
    BLI_addtail(&layout->items, bitem);

    if(layout->context) {
        but->context= layout->context;
        but->context->used= 1;
    }
}

void uiLayoutSetOperatorContext(uiLayout *layout, int opcontext)
{
    layout->root->opcontext= opcontext;
}

void uiLayoutSetFunc(uiLayout *layout, uiMenuHandleFunc handlefunc, void *argv)
{
    layout->root->handlefunc= handlefunc;
    layout->root->argv= argv;
}

void uiBlockLayoutResolve(uiBlock *block, int *x, int *y)
{
    uiLayoutRoot *root;

    if(x) *x= 0;
    if(y) *y= 0;

    block->curlayout= NULL;

    for(root=block->layouts.first; root; root=root->next) {
        /* NULL in advance so we don't interfere when adding button */
        ui_layout_end(block, root->layout, x, y);
        ui_layout_free(root->layout);
    }

    BLI_freelistN(&block->layouts);

    /* XXX silly trick, interface_templates.c doesn't get linked
     * because it's not used by other files in this module? */
    {
        UI_template_fix_linking();
    }
}

void uiLayoutSetContextPointer(uiLayout *layout, const char *name, PointerRNA *ptr)
{
    uiBlock *block= layout->root->block;
    layout->context= CTX_store_add(&block->contexts, name, ptr);
}


/* introspect funcs */
#include "BLI_dynstr.h"

static void ui_intro_button(DynStr *ds, uiButtonItem *bitem)
{
    uiBut *but = bitem->but;
    BLI_dynstr_appendf(ds, "'type':%d, ", but->type); /* see ~ UI_interface.h:200 */
    BLI_dynstr_appendf(ds, "'draw_string':'''%s''', ", but->drawstr);
    BLI_dynstr_appendf(ds, "'tip':'''%s''', ", but->tip ? but->tip : ""); // not exactly needed, rna has this

    if(but->optype) {
        char *opstr = WM_operator_pystring(but->block->evil_C, but->optype, but->opptr, 0);
        BLI_dynstr_appendf(ds, "'operator':'''%s''', ", opstr ? opstr : "");
        MEM_freeN(opstr);
    }

    if(but->rnaprop) {
        BLI_dynstr_appendf(ds, "'rna':'%s.%s[%d]', ", RNA_struct_identifier(but->rnapoin.type), RNA_property_identifier(but->rnaprop), but->rnaindex);
    }

}

static void ui_intro_items(DynStr *ds, ListBase *lb)
{
    uiItem *item;

    BLI_dynstr_append(ds, "[");

    for(item=lb->first; item; item=item->next) {

        BLI_dynstr_append(ds, "{");

        /* could also use the INT but this is nicer*/
        switch(item->type) {
        case ITEM_BUTTON:           BLI_dynstr_append(ds, "'type':'BUTTON', ");break;
        case ITEM_LAYOUT_ROW:       BLI_dynstr_append(ds, "'type':'ROW', "); break;
        case ITEM_LAYOUT_COLUMN:    BLI_dynstr_append(ds, "'type':'COLUMN', "); break;
        case ITEM_LAYOUT_COLUMN_FLOW:BLI_dynstr_append(ds, "'type':'COLUMN_FLOW', "); break;
        case ITEM_LAYOUT_ROW_FLOW:  BLI_dynstr_append(ds, "'type':'ROW_FLOW', "); break;
        case ITEM_LAYOUT_BOX:       BLI_dynstr_append(ds, "'type':'BOX', "); break;
        case ITEM_LAYOUT_ABSOLUTE:  BLI_dynstr_append(ds, "'type':'ABSOLUTE', "); break;
        case ITEM_LAYOUT_SPLIT:     BLI_dynstr_append(ds, "'type':'SPLIT', "); break;
        case ITEM_LAYOUT_OVERLAP:   BLI_dynstr_append(ds, "'type':'OVERLAP', "); break;
        case ITEM_LAYOUT_ROOT:      BLI_dynstr_append(ds, "'type':'ROOT', "); break;
        default:                    BLI_dynstr_append(ds, "'type':'UNKNOWN', "); break;
        }

        switch(item->type) {
        case ITEM_BUTTON:
            ui_intro_button(ds, (uiButtonItem *)item);
            break;
        default:
            BLI_dynstr_append(ds, "'items':");
            ui_intro_items(ds, &((uiLayout*)item)->items);
            break;
        }

        BLI_dynstr_append(ds, "}");

        if(item != lb->last)
            BLI_dynstr_append(ds, ", ");
    }
    BLI_dynstr_append(ds, "], ");
}

static void ui_intro_uiLayout(DynStr *ds, uiLayout *layout)
{
    ui_intro_items(ds, &layout->items);
}

static char *str = NULL; // XXX, constant re-freeing, far from ideal.
const char *uiLayoutIntrospect(uiLayout *layout)
{
    DynStr *ds= BLI_dynstr_new();

    if(str)
        MEM_freeN(str);

    ui_intro_uiLayout(ds, layout);

    str = BLI_dynstr_get_cstring(ds);
    BLI_dynstr_free(ds);

    return str;
}

static void ui_layout_operator_buts__reset_cb(bContext *UNUSED(C), void *op_pt, void *UNUSED(arg_dummy2))
{
    WM_operator_properties_reset((wmOperator *)op_pt);
}

/* this function does not initialize the layout, functions can be called on the layout before and after */
void uiLayoutOperatorButs(const bContext *C, uiLayout *layout, wmOperator *op,int (*check_prop)(struct PointerRNA *, struct PropertyRNA *), const char label_align, const short flag)
{
    if(!op->properties) {
        IDPropertyTemplate val = {0};
        op->properties= IDP_New(IDP_GROUP, &val, "wmOperatorProperties");
    }

    if(flag & UI_LAYOUT_OP_SHOW_TITLE) {
        uiItemL(layout, op->type->name, ICON_NONE);
    }

    /* poll() on this operator may still fail, at the moment there is no nice feedback when this happens
     * just fails silently */
    if(!WM_operator_repeat_check(C, op)) {
        uiBlockSetButLock(uiLayoutGetBlock(layout), TRUE, "Operator cannot redo");
        uiItemL(layout, "* Redo Unsupported *", ICON_NONE); // XXX, could give some nicer feedback or not show redo panel at all?
    }

    /* menu */
    if(op->type->flag & OPTYPE_PRESET) {
        /* XXX, no simple way to get WM_MT_operator_presets.bl_label from python! Label remains the same always! */
        PointerRNA op_ptr;
        uiLayout *row;

        uiLayoutGetBlock(layout)->ui_operator= op;

        row= uiLayoutRow(layout, TRUE);
        uiItemM(row, (bContext *)C, "WM_MT_operator_presets", NULL, ICON_NONE);

        WM_operator_properties_create(&op_ptr, "WM_OT_operator_preset_add");
        RNA_string_set(&op_ptr, "operator", op->type->idname);
        op_ptr= uiItemFullO(row, "WM_OT_operator_preset_add", "", ICON_ZOOMIN, op_ptr.data, WM_OP_INVOKE_DEFAULT, 0);

        WM_operator_properties_create(&op_ptr, "WM_OT_operator_preset_add");
        RNA_string_set(&op_ptr, "operator", op->type->idname);
        RNA_boolean_set(&op_ptr, "remove_active", TRUE);
        op_ptr= uiItemFullO(row, "WM_OT_operator_preset_add", "", ICON_ZOOMOUT, op_ptr.data, WM_OP_INVOKE_DEFAULT, 0);
    }

    if(op->type->ui) {
        op->layout= layout;
        op->type->ui((bContext*)C, op);
        op->layout= NULL;

        /* UI_LAYOUT_OP_SHOW_EMPTY ignored */
    }
    else {
        wmWindowManager *wm= CTX_wm_manager(C);
        PointerRNA ptr;
        int empty;

        RNA_pointer_create(&wm->id, op->type->srna, op->properties, &ptr);

        /* main draw call */
        empty= uiDefAutoButsRNA(layout, &ptr, check_prop, label_align) == 0;

        if(empty && (flag & UI_LAYOUT_OP_SHOW_EMPTY)) {
            uiItemL(layout, IFACE_("No Properties"), ICON_NONE);
        }
    }

    /* its possible that reset can do nothing if all have PROP_SKIP_SAVE enabled
     * but this is not so important if this button is drawn in those cases
     * (which isn't all that likely anyway) - campbell */
    if (op->properties->len) {
        uiBlock *block;
        uiBut *but;
        uiLayout *col; /* needed to avoid alignment errors with previous buttons */

        col= uiLayoutColumn(layout, 0);
        block= uiLayoutGetBlock(col);
        but = uiDefIconTextBut(block , BUT, 0, ICON_FILE_REFRESH, "Reset", 0, 0, 18, 20, NULL, 0.0, 0.0, 0.0, 0.0,
                               "Reset operator defaults");
        uiButSetFunc(but, ui_layout_operator_buts__reset_cb, op, NULL);
    }

    /* set various special settings for buttons */
    {
        uiBut *but;
        
        for(but= uiLayoutGetBlock(layout)->buttons.first; but; but= but->next) {
            /* no undo for buttons for operator redo panels */
            uiButClearFlag(but, UI_BUT_UNDO);
            
            /* if button is operator's default property, and a text-field, enable focus for it
             *  - this is used for allowing operators with popups to rename stuff with fewer clicks
             */
            if ((but->rnaprop == op->type->prop) && (but->type == TEX)) {
                uiButSetFocusOnEnter(CTX_wm_window(C), but);
            }
        }
    }
}

/* this is a bit of a hack but best keep it in one place at least */
MenuType *uiButGetMenuType(uiBut *but)
{
    if(but->menu_create_func == ui_item_menutype_func) {
        return (MenuType *)but->poin;
    }
    else {
        return NULL;
    }
}