wm_window.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.
 *
 * The Original Code is Copyright (C) 2007 Blender Foundation but based 
 * on ghostwinlay.c (C) 2001-2002 by NaN Holding BV
 * All rights reserved.
 *
 * Contributor(s): Blender Foundation, 2008
 *
 * ***** END GPL LICENSE BLOCK *****
 */

#include <math.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>

#include "DNA_listBase.h"   
#include "DNA_screen_types.h"
#include "DNA_windowmanager_types.h"
#include "RNA_access.h"

#include "MEM_guardedalloc.h"

#include "GHOST_C-api.h"

#include "BLI_blenlib.h"
#include "BLI_utildefines.h"

#include "BLF_translation.h"

#include "BKE_blender.h"
#include "BKE_context.h"
#include "BKE_library.h"
#include "BKE_global.h"
#include "BKE_main.h"


#include "BIF_gl.h"

#include "WM_api.h"
#include "WM_types.h"
#include "wm.h"
#include "wm_draw.h"
#include "wm_window.h"
#include "wm_subwindow.h"
#include "wm_event_system.h"

#include "ED_screen.h"
#include "ED_fileselect.h"

#include "PIL_time.h"

#include "GPU_draw.h"
#include "GPU_extensions.h"

#include "UI_interface.h"

/* the global to talk to ghost */
static GHOST_SystemHandle g_system= NULL;

/* set by commandline */
static int prefsizx= 0, prefsizy= 0, prefstax= 0, prefstay= 0, initialstate= GHOST_kWindowStateNormal;
static unsigned short useprefsize= 0;

/* ******** win open & close ************ */

/* XXX this one should correctly check for apple top header...
 done for Cocoa : returns window contents (and not frame) max size*/
void wm_get_screensize(int *width_r, int *height_r)
{
    unsigned int uiwidth;
    unsigned int uiheight;
    
    GHOST_GetMainDisplayDimensions(g_system, &uiwidth, &uiheight);
    *width_r= uiwidth;
    *height_r= uiheight;
}

/* keeps offset and size within monitor bounds */
/* XXX solve dual screen... */
static void wm_window_check_position(rcti *rect)
{
    int width, height, d;
    
    wm_get_screensize(&width, &height);
    
#if defined(__APPLE__) && !defined(GHOST_COCOA)
    height -= 70;
#endif
    
    if(rect->xmin < 0) {
        rect->xmax -= rect->xmin;
        rect->xmin  = 0;
    }
    if(rect->ymin < 0) {
        rect->ymax -= rect->ymin;
        rect->ymin  = 0;
    }
    if(rect->xmax > width) {
        d= rect->xmax - width;
        rect->xmax -= d;
        rect->xmin -= d;
    }
    if(rect->ymax > height) {
        d= rect->ymax - height;
        rect->ymax -= d;
        rect->ymin -= d;
    }
    
    if(rect->xmin < 0) rect->xmin= 0;
    if(rect->ymin < 0) rect->ymin= 0;
}


static void wm_ghostwindow_destroy(wmWindow *win) 
{
    if(win->ghostwin) {
        GHOST_DisposeWindow(g_system, win->ghostwin);
        win->ghostwin= NULL;
    }
}

/* including window itself, C can be NULL. 
   ED_screen_exit should have been called */
void wm_window_free(bContext *C, wmWindowManager *wm, wmWindow *win)
{
    wmTimer *wt, *wtnext;
    
    /* update context */
    if(C) {
        WM_event_remove_handlers(C, &win->handlers);
        WM_event_remove_handlers(C, &win->modalhandlers);

        if(CTX_wm_window(C)==win)
            CTX_wm_window_set(C, NULL);
    }   

    /* always set drawable and active to NULL, prevents non-drawable state of main windows (bugs #22967 and #25071, possibly #22477 too) */
    wm->windrawable= NULL;
    wm->winactive= NULL;

    /* end running jobs, a job end also removes its timer */
    for(wt= wm->timers.first; wt; wt= wtnext) {
        wtnext= wt->next;
        if(wt->win==win && wt->event_type==TIMERJOBS)
            wm_jobs_timer_ended(wm, wt);
    }
    
    /* timer removing, need to call this api function */
    for(wt= wm->timers.first; wt; wt=wtnext) {
        wtnext= wt->next;
        if(wt->win==win)
            WM_event_remove_timer(wm, win, wt);
    }

    if(win->eventstate) MEM_freeN(win->eventstate);
    
    wm_event_free_all(win);
    wm_subwindows_free(win);
    
    if(win->drawdata)
        MEM_freeN(win->drawdata);
    
    wm_ghostwindow_destroy(win);
    
    MEM_freeN(win);
}

static int find_free_winid(wmWindowManager *wm)
{
    wmWindow *win;
    int id= 1;
    
    for(win= wm->windows.first; win; win= win->next)
        if(id <= win->winid)
            id= win->winid+1;
    
    return id;
}

/* dont change context itself */
wmWindow *wm_window_new(bContext *C)
{
    wmWindowManager *wm= CTX_wm_manager(C);
    wmWindow *win= MEM_callocN(sizeof(wmWindow), "window");
    
    BLI_addtail(&wm->windows, win);
    win->winid= find_free_winid(wm);

    return win;
}


/* part of wm_window.c api */
wmWindow *wm_window_copy(bContext *C, wmWindow *winorig)
{
    wmWindow *win= wm_window_new(C);
    
    win->posx= winorig->posx+10;
    win->posy= winorig->posy;
    win->sizex= winorig->sizex;
    win->sizey= winorig->sizey;
    
    /* duplicate assigns to window */
    win->screen= ED_screen_duplicate(win, winorig->screen);
    BLI_strncpy(win->screenname, win->screen->id.name+2, sizeof(win->screenname));
    win->screen->winid= win->winid;

    win->screen->do_refresh= 1;
    win->screen->do_draw= 1;

    win->drawmethod= -1;
    win->drawdata= NULL;
    
    return win;
}

/* this is event from ghost, or exit-blender op */
void wm_window_close(bContext *C, wmWindowManager *wm, wmWindow *win)
{
    bScreen *screen= win->screen;
    
    BLI_remlink(&wm->windows, win);
    
    wm_draw_window_clear(win);
    CTX_wm_window_set(C, win);  /* needed by handlers */
    WM_event_remove_handlers(C, &win->handlers);
    WM_event_remove_handlers(C, &win->modalhandlers);
    ED_screen_exit(C, win, win->screen); 
    
    wm_window_free(C, wm, win);
    
    /* if temp screen, delete it after window free (it stops jobs that can access it) */
    if(screen->temp) {
        Main *bmain= CTX_data_main(C);
        free_libblock(&bmain->screen, screen);
    }
    
    /* check remaining windows */
    if(wm->windows.first) {
        for(win= wm->windows.first; win; win= win->next)
            if(win->screen->temp == 0)
                break;
        /* in this case we close all */
        if(win==NULL)
            WM_exit(C);
    }
    else
        WM_exit(C);
}

void wm_window_title(wmWindowManager *wm, wmWindow *win)
{
    /* handle the 'temp' window, only set title when not set before */
    if(win->screen && win->screen->temp) {
        char *title= GHOST_GetTitle(win->ghostwin);
        if(title==NULL || title[0]==0)
            GHOST_SetTitle(win->ghostwin, "Blender");
    }
    else {
        
        /* this is set to 1 if you don't have startup.blend open */
        if(G.save_over && G.main->name[0]) {
            char str[sizeof(G.main->name) + 12];
            BLI_snprintf(str, sizeof(str), "Blender%s [%s]", wm->file_saved ? "":"*", G.main->name);
            GHOST_SetTitle(win->ghostwin, str);
        }
        else
            GHOST_SetTitle(win->ghostwin, "Blender");

        /* Informs GHOST of unsaved changes, to set window modified visual indicator (MAC OS X)
         and to give hint of unsaved changes for a user warning mechanism
         in case of OS application terminate request (e.g. OS Shortcut Alt+F4, Cmd+Q, (...), or session end) */
        GHOST_SetWindowModifiedState(win->ghostwin, (GHOST_TUns8)!wm->file_saved);
        
#if defined(__APPLE__) && !defined(GHOST_COCOA)
        if(wm->file_saved)
            GHOST_SetWindowState(win->ghostwin, GHOST_kWindowStateUnModified);
        else
            GHOST_SetWindowState(win->ghostwin, GHOST_kWindowStateModified);
#endif
    }
}

/* belongs to below */
static void wm_window_add_ghostwindow(bContext *C, const char *title, wmWindow *win)
{
    GHOST_WindowHandle ghostwin;
    int scr_w, scr_h, posy;
    GHOST_TWindowState initial_state;

    /* when there is no window open uses the initial state */
    if(!CTX_wm_window(C))
        initial_state= initialstate;
    else
        initial_state= GHOST_kWindowStateNormal;
    
    wm_get_screensize(&scr_w, &scr_h);
    posy= (scr_h - win->posy - win->sizey);
    
#if defined(__APPLE__) && !defined(GHOST_COCOA)
    {
        extern int macPrefState; /* creator.c */
        initial_state += macPrefState;
    }
#endif
    /* Disable AA for now, as GL_SELECT (used for border, lasso, ... select)
     doesn't work well when AA is initialized, even if not used. */
    ghostwin= GHOST_CreateWindow(g_system, title, 
                                 win->posx, posy, win->sizex, win->sizey, 
                                 initial_state, 
                                 GHOST_kDrawingContextTypeOpenGL,
                                 0 /* no stereo */,
                                 0 /* no AA */);
    
    if (ghostwin) {
        /* needed so we can detect the graphics card below */
        GPU_extensions_init();
        
        /* set the state*/
        GHOST_SetWindowState(ghostwin, initial_state);

        win->ghostwin= ghostwin;
        GHOST_SetWindowUserData(ghostwin, win); /* pointer back */
        
        if(win->eventstate==NULL)
            win->eventstate= MEM_callocN(sizeof(wmEvent), "window event state");
        
        /* until screens get drawn, make it nice grey */
        glClearColor(.55, .55, .55, 0.0);
        /* Crash on OSS ATI: bugs.launchpad.net/ubuntu/+source/mesa/+bug/656100 */
        if(!GPU_type_matches(GPU_DEVICE_ATI, GPU_OS_UNIX, GPU_DRIVER_OPENSOURCE)) {
            glClear(GL_COLOR_BUFFER_BIT);
        }

        wm_window_swap_buffers(win);
        
        //GHOST_SetWindowState(ghostwin, GHOST_kWindowStateModified);
        
        /* standard state vars for window */
        glEnable(GL_SCISSOR_TEST);
        
        GPU_state_init();
    }
}

/* for wmWindows without ghostwin, open these and clear */
/* window size is read from window, if 0 it uses prefsize */
/* called in WM_check, also inits stuff after file read */
void wm_window_add_ghostwindows(bContext* C, wmWindowManager *wm)
{
    wmKeyMap *keymap;
    wmWindow *win;
    
    /* no commandline prefsize? then we set this.
     * Note that these values will be used only
     * when there is no startup.blend yet.
     */
    if (!prefsizx) {
        wm_get_screensize(&prefsizx, &prefsizy);
        
#if defined(__APPLE__) && !defined(GHOST_COCOA)
//Cocoa provides functions to get correct max window size
        {
            extern void wm_set_apple_prefsize(int, int);    /* wm_apple.c */
            
            wm_set_apple_prefsize(prefsizx, prefsizy);
        }
#else
        prefstax= 0;
        prefstay= 0;
        
#endif
    }
    
    for(win= wm->windows.first; win; win= win->next) {
        if(win->ghostwin==NULL) {
            if(win->sizex==0 || useprefsize) {
                win->posx= prefstax;
                win->posy= prefstay;
                win->sizex= prefsizx;
                win->sizey= prefsizy;
                win->windowstate= initialstate;
                useprefsize= 0;
            }
            wm_window_add_ghostwindow(C, "Blender", win);
        }
        /* happens after fileread */
        if(win->eventstate==NULL)
            win->eventstate= MEM_callocN(sizeof(wmEvent), "window event state");

        /* add keymap handlers (1 handler for all keys in map!) */
        keymap= WM_keymap_find(wm->defaultconf, "Window", 0, 0);
        WM_event_add_keymap_handler(&win->handlers, keymap);
        
        keymap= WM_keymap_find(wm->defaultconf, "Screen", 0, 0);
        WM_event_add_keymap_handler(&win->handlers, keymap);

        keymap= WM_keymap_find(wm->defaultconf, "Screen Editing", 0, 0);
        WM_event_add_keymap_handler(&win->modalhandlers, keymap);
        
        /* add drop boxes */
        {
            ListBase *lb= WM_dropboxmap_find("Window", 0, 0);
            WM_event_add_dropbox_handler(&win->handlers, lb);
        }
        wm_window_title(wm, win);
    }
}

/* new window, no screen yet, but we open ghostwindow for it */
/* also gets the window level handlers */
/* area-rip calls this */
wmWindow *WM_window_open(bContext *C, rcti *rect)
{
    wmWindow *win= wm_window_new(C);
    
    win->posx= rect->xmin;
    win->posy= rect->ymin;
    win->sizex= rect->xmax - rect->xmin;
    win->sizey= rect->ymax - rect->ymin;

    win->drawmethod= -1;
    win->drawdata= NULL;
    
    WM_check(C);
    
    return win;
}

/* uses screen->temp tag to define what to do, currently it limits
   to only one "temp" window for render out, preferences, filewindow, etc */
/* type is #define in WM_api.h */

void WM_window_open_temp(bContext *C, rcti *position, int type)
{
    wmWindow *win;
    ScrArea *sa;
    
    /* changes rect to fit within desktop */
    wm_window_check_position(position);
    
    /* test if we have a temp screen already */
    for(win= CTX_wm_manager(C)->windows.first; win; win= win->next)
        if(win->screen->temp)
            break;
    
    /* add new window? */
    if(win==NULL) {
        win= wm_window_new(C);
        
        win->posx= position->xmin;
        win->posy= position->ymin;
    }
    
    win->sizex= position->xmax - position->xmin;
    win->sizey= position->ymax - position->ymin;
    
    if(win->ghostwin) {
        wm_window_set_size(win, win->sizex, win->sizey) ;
        wm_window_raise(win);
    }
    
    /* add new screen? */
    if(win->screen==NULL)
        win->screen= ED_screen_add(win, CTX_data_scene(C), "temp");
    win->screen->temp = 1; 
    
    /* make window active, and validate/resize */
    CTX_wm_window_set(C, win);
    WM_check(C);
    
    /* ensure it shows the right spacetype editor */
    sa= win->screen->areabase.first;
    CTX_wm_area_set(C, sa);
    
    if(type==WM_WINDOW_RENDER) {
        ED_area_newspace(C, sa, SPACE_IMAGE);
    }
    else {
        ED_area_newspace(C, sa, SPACE_USERPREF);
    }
    
    ED_screen_set(C, win->screen);
    
    if(sa->spacetype==SPACE_IMAGE)
        GHOST_SetTitle(win->ghostwin, IFACE_("Blender Render"));
    else if(ELEM(sa->spacetype, SPACE_OUTLINER, SPACE_USERPREF))
        GHOST_SetTitle(win->ghostwin, IFACE_("Blender User Preferences"));
    else if(sa->spacetype==SPACE_FILE)
        GHOST_SetTitle(win->ghostwin, IFACE_("Blender File View"));
    else
        GHOST_SetTitle(win->ghostwin, "Blender");
}


/* ****************** Operators ****************** */

/* operator callback */
int wm_window_duplicate_exec(bContext *C, wmOperator *UNUSED(op))
{
    wm_window_copy(C, CTX_wm_window(C));
    WM_check(C);
    
    WM_event_add_notifier(C, NC_WINDOW|NA_ADDED, NULL);
    
    return OPERATOR_FINISHED;
}


/* fullscreen operator callback */
int wm_window_fullscreen_toggle_exec(bContext *C, wmOperator *UNUSED(op))
{
    wmWindow *window= CTX_wm_window(C);
    GHOST_TWindowState state;

    if(G.background)
        return OPERATOR_CANCELLED;

    state= GHOST_GetWindowState(window->ghostwin);
    if(state!=GHOST_kWindowStateFullScreen)
        GHOST_SetWindowState(window->ghostwin, GHOST_kWindowStateFullScreen);
    else
        GHOST_SetWindowState(window->ghostwin, GHOST_kWindowStateNormal);

    return OPERATOR_FINISHED;
    
}


/* ************ events *************** */

typedef enum
{
    SHIFT = 's',
    CONTROL = 'c',
    ALT = 'a',
    OS = 'C'
} modifierKeyType;

/* check if specified modifier key type is pressed */
static int query_qual(modifierKeyType qual) 
{
    GHOST_TModifierKeyMask left, right;
    int val= 0;
    
    switch(qual) {
        case SHIFT:
            left= GHOST_kModifierKeyLeftShift;
            right= GHOST_kModifierKeyRightShift;
            break;
        case CONTROL:
            left= GHOST_kModifierKeyLeftControl;
            right= GHOST_kModifierKeyRightControl;
            break;
        case OS:
            left= right= GHOST_kModifierKeyOS;
            break;
        case ALT:
        default:
            left= GHOST_kModifierKeyLeftAlt;
            right= GHOST_kModifierKeyRightAlt;
            break;
    }
    
    GHOST_GetModifierKeyState(g_system, left, &val);
    if (!val)
        GHOST_GetModifierKeyState(g_system, right, &val);
    
    return val;
}

void wm_window_make_drawable(bContext *C, wmWindow *win) 
{
    wmWindowManager *wm= CTX_wm_manager(C);

    if (win != wm->windrawable && win->ghostwin) {
//      win->lmbut= 0;  /* keeps hanging when mousepressed while other window opened */
        
        wm->windrawable= win;
        if(G.f & G_DEBUG) printf("set drawable %d\n", win->winid);
        GHOST_ActivateWindowDrawingContext(win->ghostwin);
    }
}

/* called by ghost, here we handle events for windows themselves or send to event system */
static int ghost_event_proc(GHOST_EventHandle evt, GHOST_TUserDataPtr private) 
{
    bContext *C= private;
    wmWindowManager *wm= CTX_wm_manager(C);
    GHOST_TEventType type= GHOST_GetEventType(evt);
    int time= GHOST_GetEventTime(evt);
    
    if (type == GHOST_kEventQuit) {
        WM_exit(C);
    } else {
        GHOST_WindowHandle ghostwin= GHOST_GetEventWindow(evt);
        GHOST_TEventDataPtr data= GHOST_GetEventData(evt);
        wmWindow *win;
        
        if (!ghostwin) {
            // XXX - should be checked, why are we getting an event here, and
            //  what is it?
            puts("<!> event has no window");
            return 1;
        } else if (!GHOST_ValidWindow(g_system, ghostwin)) {
            // XXX - should be checked, why are we getting an event here, and
            //  what is it?
            puts("<!> event has invalid window");           
            return 1;
        } else {
            win= GHOST_GetWindowUserData(ghostwin);
        }
        
        switch(type) {
            case GHOST_kEventWindowDeactivate:
                wm_event_add_ghostevent(wm, win, type, time, data);
                win->active= 0; /* XXX */
                break;
            case GHOST_kEventWindowActivate: 
            {
                GHOST_TEventKeyData kdata;
                int cx, cy, wx, wy;
                
                wm->winactive= win; /* no context change! c->wm->windrawable is drawable, or for area queues */
                
                win->active= 1;
//              window_handle(win, INPUTCHANGE, win->active);
                
                /* bad ghost support for modifier keys... so on activate we set the modifiers again */
                kdata.ascii= '\0';
                kdata.utf8_buf[0]= '\0';
                if (win->eventstate->shift && !query_qual(SHIFT)) {
                    kdata.key= GHOST_kKeyLeftShift;
                    wm_event_add_ghostevent(wm, win, GHOST_kEventKeyUp, time, &kdata);
                }
                if (win->eventstate->ctrl && !query_qual(CONTROL)) {
                    kdata.key= GHOST_kKeyLeftControl;
                    wm_event_add_ghostevent(wm, win, GHOST_kEventKeyUp, time, &kdata);
                }
                if (win->eventstate->alt && !query_qual(ALT)) {
                    kdata.key= GHOST_kKeyLeftAlt;
                    wm_event_add_ghostevent(wm, win, GHOST_kEventKeyUp, time, &kdata);
                }
                if (win->eventstate->oskey && !query_qual(OS)) {
                    kdata.key= GHOST_kKeyOS;
                    wm_event_add_ghostevent(wm, win, GHOST_kEventKeyUp, time, &kdata);
                }
                /* keymodifier zero, it hangs on hotkeys that open windows otherwise */
                win->eventstate->keymodifier= 0;
                
                /* entering window, update mouse pos. but no event */
                GHOST_GetCursorPosition(g_system, &wx, &wy);
                
                GHOST_ScreenToClient(win->ghostwin, wx, wy, &cx, &cy);
                win->eventstate->x= cx;
                win->eventstate->y= (win->sizey-1) - cy;
                
                win->addmousemove= 1;   /* enables highlighted buttons */
                
                wm_window_make_drawable(C, win);
                break;
            }
            case GHOST_kEventWindowClose: {
                wm_window_close(C, wm, win);
                break;
            }
            case GHOST_kEventWindowUpdate: {
                if(G.f & G_DEBUG) printf("ghost redraw\n");
                
                wm_window_make_drawable(C, win);
                WM_event_add_notifier(C, NC_WINDOW, NULL);

                break;
            }
            case GHOST_kEventWindowSize:
            case GHOST_kEventWindowMove: {
                GHOST_TWindowState state;
                state = GHOST_GetWindowState(win->ghostwin);

                 /* win32: gives undefined window size when minimized */
                if(state!=GHOST_kWindowStateMinimized) {
                    GHOST_RectangleHandle client_rect;
                    int l, t, r, b, scr_w, scr_h;
                    int sizex, sizey, posx, posy;
                    
                    client_rect= GHOST_GetClientBounds(win->ghostwin);
                    GHOST_GetRectangle(client_rect, &l, &t, &r, &b);
                    
                    GHOST_DisposeRectangle(client_rect);
                    
                    wm_get_screensize(&scr_w, &scr_h);
                    sizex= r-l;
                    sizey= b-t;
                    posx= l;
                    posy= scr_h - t - win->sizey;

                    /*
                     * Ghost sometimes send size or move events when the window hasn't changed.
                     * One case of this is using compiz on linux. To alleviate the problem
                     * we ignore all such event here.
                     * 
                     * It might be good to eventually do that at Ghost level, but that is for 
                     * another time.
                     */
                    if (win->sizex != sizex ||
                            win->sizey != sizey ||
                            win->posx != posx ||
                            win->posy != posy)
                    {
                        win->sizex= sizex;
                        win->sizey= sizey;
                        win->posx= posx;
                        win->posy= posy;

                        /* debug prints */
                        if(0) {
                            state = GHOST_GetWindowState(win->ghostwin);
    
                            if(state==GHOST_kWindowStateNormal) {
                                if(G.f & G_DEBUG) printf("window state: normal\n");
                            }
                            else if(state==GHOST_kWindowStateMinimized) {
                                if(G.f & G_DEBUG) printf("window state: minimized\n");
                            }
                            else if(state==GHOST_kWindowStateMaximized) {
                                if(G.f & G_DEBUG) printf("window state: maximized\n");
                            }
                            else if(state==GHOST_kWindowStateFullScreen) {
                                if(G.f & G_DEBUG) printf("window state: fullscreen\n");
                            }
                            
                            if(type!=GHOST_kEventWindowSize) {
                                if(G.f & G_DEBUG) printf("win move event pos %d %d size %d %d\n", win->posx, win->posy, win->sizex, win->sizey);
                            }
                            
                        }
                    
                        wm_window_make_drawable(C, win);
                        wm_draw_window_clear(win);
                        WM_event_add_notifier(C, NC_SCREEN|NA_EDITED, NULL);
                        WM_event_add_notifier(C, NC_WINDOW|NA_EDITED, NULL);
                    }
                }
                break;
            }
                
            case GHOST_kEventOpenMainFile:
            {
                PointerRNA props_ptr;
                wmWindow *oldWindow;
                char *path = GHOST_GetEventData(evt);
                
                if (path) {
                    /* operator needs a valid window in context, ensures
                     it is correctly set */
                    oldWindow = CTX_wm_window(C);
                    CTX_wm_window_set(C, win);
                    
                    WM_operator_properties_create(&props_ptr, "WM_OT_open_mainfile");
                    RNA_string_set(&props_ptr, "filepath", path);
                    WM_operator_name_call(C, "WM_OT_open_mainfile", WM_OP_EXEC_DEFAULT, &props_ptr);
                    WM_operator_properties_free(&props_ptr);
                    
                    CTX_wm_window_set(C, oldWindow);
                }
                break;
            }
            case GHOST_kEventDraggingDropDone:
            {
                wmEvent event;
                GHOST_TEventDragnDropData *ddd= GHOST_GetEventData(evt);
                int cx, cy, wx, wy;
                
                /* entering window, update mouse pos */
                GHOST_GetCursorPosition(g_system, &wx, &wy);
                
                GHOST_ScreenToClient(win->ghostwin, wx, wy, &cx, &cy);
                win->eventstate->x= cx;
                win->eventstate->y= (win->sizey-1) - cy;
                
                event= *(win->eventstate);  /* copy last state, like mouse coords */
                
                // activate region
                event.type= MOUSEMOVE;
                event.prevx= event.x;
                event.prevy= event.y;
                
                wm->winactive= win; /* no context change! c->wm->windrawable is drawable, or for area queues */
                win->active= 1;
                
                wm_event_add(win, &event);
                
                
                /* make blender drop event with custom data pointing to wm drags */
                event.type= EVT_DROP;
                event.val= KM_RELEASE;
                event.custom= EVT_DATA_LISTBASE;
                event.customdata= &wm->drags;
                event.customdatafree= 1;
                
                wm_event_add(win, &event);
                
                /* printf("Drop detected\n"); */
                
                /* add drag data to wm for paths: */
                
                if(ddd->dataType == GHOST_kDragnDropTypeFilenames) {
                    GHOST_TStringArray *stra= ddd->data;
                    int a, icon;
                    
                    for(a=0; a<stra->count; a++) {
                        printf("drop file %s\n", stra->strings[a]);
                        /* try to get icon type from extension */
                        icon= ED_file_extension_icon((char *)stra->strings[a]);
                        
                        WM_event_start_drag(C, icon, WM_DRAG_PATH, stra->strings[a], 0.0);
                        /* void poin should point to string, it makes a copy */
                        break; // only one drop element supported now 
                    }
                }
                
                
                
                break;
            }
            
            default:
                wm_event_add_ghostevent(wm, win, type, time, data);
                break;
        }

    }
    return 1;
}


/* This timer system only gives maximum 1 timer event per redraw cycle,
   to prevent queues to get overloaded. 
   Timer handlers should check for delta to decide if they just
   update, or follow real time.
   Timer handlers can also set duration to match frames passed
*/
static int wm_window_timer(const bContext *C)
{
    wmWindowManager *wm= CTX_wm_manager(C);
    wmTimer *wt, *wtnext;
    wmWindow *win;
    double time= PIL_check_seconds_timer();
    int retval= 0;
    
    for(wt= wm->timers.first; wt; wt= wtnext) {
        wtnext= wt->next; /* in case timer gets removed */
        win= wt->win;

        if(wt->sleep==0) {
            if(time > wt->ntime) {
                wt->delta= time - wt->ltime;
                wt->duration += wt->delta;
                wt->ltime= time;
                wt->ntime= wt->stime + wt->timestep*ceil(wt->duration/wt->timestep);

                if(wt->event_type == TIMERJOBS)
                    wm_jobs_timer(C, wm, wt);
                else if(wt->event_type == TIMERAUTOSAVE)
                    wm_autosave_timer(C, wm, wt);
                else if(win) {
                    wmEvent event= *(win->eventstate);
                    
                    event.type= wt->event_type;
                    event.custom= EVT_DATA_TIMER;
                    event.customdata= wt;
                    wm_event_add(win, &event);

                    retval= 1;
                }
            }
        }
    }
    return retval;
}

void wm_window_process_events(const bContext *C) 
{
    int hasevent= GHOST_ProcessEvents(g_system, 0); /* 0 is no wait */
    
    if(hasevent)
        GHOST_DispatchEvents(g_system);
    
    hasevent |= wm_window_timer(C);

    /* no event, we sleep 5 milliseconds */
    if(hasevent==0)
        PIL_sleep_ms(5);
}

void wm_window_process_events_nosleep(void) 
{
    if(GHOST_ProcessEvents(g_system, 0))
        GHOST_DispatchEvents(g_system);
}

/* exported as handle callback to bke blender.c */
void wm_window_testbreak(void)
{
    static double ltime= 0;
    double curtime= PIL_check_seconds_timer();
    
    /* only check for breaks every 50 milliseconds
        * if we get called more often.
        */
    if ((curtime-ltime)>.05) {
        int hasevent= GHOST_ProcessEvents(g_system, 0); /* 0 is no wait */
        
        if(hasevent)
            GHOST_DispatchEvents(g_system);
        
        ltime= curtime;
    }
}

/* **************** init ********************** */

void wm_ghost_init(bContext *C)
{
    if (!g_system) {
        GHOST_EventConsumerHandle consumer= GHOST_CreateEventConsumer(ghost_event_proc, C);
        
        g_system= GHOST_CreateSystem();
        GHOST_AddEventConsumer(g_system, consumer);
    }   
}

void wm_ghost_exit(void)
{
    if(g_system)
        GHOST_DisposeSystem(g_system);

    g_system= NULL;
}

/* **************** timer ********************** */

/* to (de)activate running timers temporary */
void WM_event_timer_sleep(wmWindowManager *wm, wmWindow *UNUSED(win), wmTimer *timer, int dosleep)
{
    wmTimer *wt;
    
    for(wt= wm->timers.first; wt; wt= wt->next)
        if(wt==timer)
            break;

    if(wt)
        wt->sleep= dosleep;
}

wmTimer *WM_event_add_timer(wmWindowManager *wm, wmWindow *win, int event_type, double timestep)
{
    wmTimer *wt= MEM_callocN(sizeof(wmTimer), "window timer");
    
    wt->event_type= event_type;
    wt->ltime= PIL_check_seconds_timer();
    wt->ntime= wt->ltime + timestep;
    wt->stime= wt->ltime;
    wt->timestep= timestep;
    wt->win= win;
    
    BLI_addtail(&wm->timers, wt);
    
    return wt;
}

void WM_event_remove_timer(wmWindowManager *wm, wmWindow *UNUSED(win), wmTimer *timer)
{
    wmTimer *wt;
    
    /* extra security check */
    for(wt= wm->timers.first; wt; wt= wt->next)
        if(wt==timer)
            break;
    if(wt) {
        if(wm->reports.reporttimer == wt)
            wm->reports.reporttimer= NULL;
        
        BLI_remlink(&wm->timers, wt);
        if(wt->customdata)
            MEM_freeN(wt->customdata);
        MEM_freeN(wt);
    }
}

/* ******************* clipboard **************** */

char *WM_clipboard_text_get(int selection)
{
    char *p, *p2, *buf, *newbuf;

    if(G.background)
        return NULL;

    buf= (char*)GHOST_getClipboard(selection);
    if(!buf)
        return NULL;
    
    /* always convert from \r\n to \n */
    newbuf= MEM_callocN(strlen(buf)+1, "WM_clipboard_text_get");

    for(p= buf, p2= newbuf; *p; p++) {
        if(*p != '\r')
            *(p2++)= *p;
    }
    *p2= '\0';

    free(buf); /* ghost uses regular malloc */
    
    return newbuf;
}

void WM_clipboard_text_set(char *buf, int selection)
{
    if(!G.background) {
#ifdef _WIN32
        /* do conversion from \n to \r\n on Windows */
        char *p, *p2, *newbuf;
        int newlen= 0;
        
        for(p= buf; *p; p++) {
            if(*p == '\n')
                newlen += 2;
            else
                newlen++;
        }
        
        newbuf= MEM_callocN(newlen+1, "WM_clipboard_text_set");
    
        for(p= buf, p2= newbuf; *p; p++, p2++) {
            if(*p == '\n') { 
                *(p2++)= '\r'; *p2= '\n';
            }
            else *p2= *p;
        }
        *p2= '\0';
    
        GHOST_putClipboard((GHOST_TInt8*)newbuf, selection);
        MEM_freeN(newbuf);
#else
        GHOST_putClipboard((GHOST_TInt8*)buf, selection);
#endif
    }
}

/* ******************* progress bar **************** */

void WM_progress_set(wmWindow *win, float progress)
{
    GHOST_SetProgressBar(win->ghostwin, progress);
}

void WM_progress_clear(wmWindow *win)
{
    GHOST_EndProgressBar(win->ghostwin);
}

/* ************************************ */

void wm_window_get_position(wmWindow *win, int *posx_r, int *posy_r) 
{
    *posx_r= win->posx;
    *posy_r= win->posy;
}

void wm_window_get_size(wmWindow *win, int *width_r, int *height_r) 
{
    *width_r= win->sizex;
    *height_r= win->sizey;
}

/* exceptional case: - splash is called before events are processed
 * this means we dont actually know the window size so get this from GHOST */
void wm_window_get_size_ghost(wmWindow *win, int *width_r, int *height_r)
{
    GHOST_RectangleHandle bounds= GHOST_GetClientBounds(win->ghostwin);
    *width_r= GHOST_GetWidthRectangle(bounds);
    *height_r= GHOST_GetHeightRectangle(bounds);
    
    GHOST_DisposeRectangle(bounds);
}

void wm_window_set_size(wmWindow *win, int width, int height) 
{
    GHOST_SetClientSize(win->ghostwin, width, height);
}

void wm_window_lower(wmWindow *win) 
{
    GHOST_SetWindowOrder(win->ghostwin, GHOST_kWindowOrderBottom);
}

void wm_window_raise(wmWindow *win) 
{
    GHOST_SetWindowOrder(win->ghostwin, GHOST_kWindowOrderTop);
}

void wm_window_swap_buffers(wmWindow *win)
{
    
#ifdef WIN32
    glDisable(GL_SCISSOR_TEST);
    GHOST_SwapWindowBuffers(win->ghostwin);
    glEnable(GL_SCISSOR_TEST);
#else
    GHOST_SwapWindowBuffers(win->ghostwin);
#endif
}

void wm_get_cursor_position(wmWindow *win, int *x, int *y)
{
    GHOST_GetCursorPosition(g_system, x, y);
    GHOST_ScreenToClient(win->ghostwin, *x, *y, x, y);
    *y = (win->sizey-1) - *y;
}

/* ******************* exported api ***************** */


/* called whem no ghost system was initialized */
void WM_setprefsize(int stax, int stay, int sizx, int sizy)
{
    prefstax= stax;
    prefstay= stay;
    prefsizx= sizx;
    prefsizy= sizy;
    useprefsize= 1;
}

/* for borderless and border windows set from command-line */
void WM_setinitialstate_fullscreen(void)
{
    initialstate= GHOST_kWindowStateFullScreen;
}

void WM_setinitialstate_normal(void)
{
    initialstate= GHOST_kWindowStateNormal;
}

/* This function requires access to the GHOST_SystemHandle (g_system) */
void WM_cursor_warp(wmWindow *win, int x, int y)
{
    if (win && win->ghostwin) {
        int oldx=x, oldy=y;

        y= win->sizey -y - 1;

        GHOST_ClientToScreen(win->ghostwin, x, y, &x, &y);
        GHOST_SetCursorPosition(g_system, x, y);

        win->eventstate->prevx= oldx;
        win->eventstate->prevy= oldy;
    }
}