On Wed, Jun 22, 2005 at 02:53:03PM -0400, Jim C. Brown wrote:
> This version of gtk2.c includes the right header file (at least according to 
> MSDN).
> 
> However, after some deeper examination of the issue, it looks like it would be
> better to convert the virtual key codes to the us keyboard scancodes via some
> sort of keymap (similar to the X11 case).
> 

Ok this is probably the final revision. I had the code vindicated by an actual
Windows programmer. He says it should work fine. It should compile, run, and 
make
qemu under gtk usable. Also I modified it so it lets u know when u are using 
GTK.

-- 
Infinite complexity begets infinite beauty.
Infinite precision begets infinite perfection.
/*
 * QEMU GTK2 display driver
 * based on SDL driver by Fabrice
 * 
 * Copyright (c) 2005 Jim Brown
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
#include "vl.h"

#include <gtk/gtk.h>
#include <gdk/gdk.h>

#include "fullscreen.h"

/* define our own bitshift enums to allow qemugtk to know difference between 
left and right alt - something gtk doesnt provide in its modifiers mask. this 
uses qemu's own modifier_state[] map in order to guess correctly */
typedef enum
{
        gtkshiftleft = 1 << 0,
        gtkshiftright = 1 << 1,
        gtkcontrolleft = 1 << 2,
        gtkcontrolright = 1 << 3,
        gtkaltleft = 1 << 4,
        gtkaltright = 1 << 5,
        gtkcapslock = 1 << 6
} gtk2keymod;


static GtkWidget *screen;
static GdkImage *image=NULL;
static GdkCursor *invisible_cursor;
static int ox = 0, oy = 0;
static int gui_grab; /* if true, all keyboard/mouse events are grabbed */
static int last_vm_running;
static int gui_saved_grab;
static int gui_fullscreen;
static int gui_key_modifier_pressed;
static int gui_keysym;
static int gui_fullscreen_initial_grab;
static int gui_grab_code = gtkaltleft | gtkcontrolleft;
static uint8_t modifiers_state[256];
static unsigned int cw, ch;
static gint cx, cy;

static gboolean gtk2_expose(GtkWidget *wid, GdkEventExpose *event)
{
    gdk_draw_image(wid->window, wid->style->fg_gc[GTK_WIDGET_STATE(wid)], 
image, event->area.x, event->area.y, event->area.x, event->area.y, 
event->area.width, event->area.height);
    return TRUE;
}

static void gtk2_update(DisplayState *ds, int x, int y, int w, int h)
{
    //    printf("updating x=%d y=%d w=%d h=%d\n", x, y, w, h);
    GdkEventExpose ev;
    ev.area.x = x;
    ev.area.y = y;
    ev.area.width = w;
    ev.area.height = h;
    gtk2_expose(screen, &ev);
}

static void gtk2_resize(DisplayState *ds, int w, int h)
{

    //    printf(" resizing to %d %d\n", w, h);

    if (gui_fullscreen)
    {
        if (cw != w || ch != h)
            fullscreen_switch(cx, cy, w, h); /* changing video modes */
        //gtk_window_fullscreen(GTK_WINDOW(screen));
    }
    else
    {
        //gtk_window_unfullscreen(GTK_WINDOW(screen));
    }

    cw = w; ch = h;

    if (image)
         g_object_unref(image);

/* gdk_visual_get_best_with_depth() ??? but then how to paint onto window? */
    image = gdk_image_new(GDK_IMAGE_NORMAL, gdk_visual_get_system(), w, h);
    gdk_image_set_colormap(image, gdk_colormap_get_system());

    gtk_window_set_default_size(GTK_WINDOW(screen), w, h);
    gtk_widget_set_size_request(screen, w, h);
    gtk_window_resize(GTK_WINDOW(screen), w, h);

    ds->data = image->mem;
    ds->linesize = image->bpl;
    ds->depth = image->bits_per_pixel;
    ds->width = w;
    ds->height = h;
    gtk2_update(ds, 0, 0, w, h);
}

/* generic keyboard conversion */

#include "gdk_keysym.h"
#include "keymaps.c"

static kbd_layout_t *kbd_layout = NULL;

static uint8_t gtk2_keyevent_to_keycode_generic(const GdkEventKey *ev)
{
    int keysym;
    /* workaround for X11+SDL bug with AltGR - is it still needed for Gtk2? */
    keysym = ev->keyval;
    if (keysym == 0 && ev->hardware_keycode == 113)
        keysym = GDK_Mode_switch;
    return keysym2scancode(kbd_layout, keysym);
}

/* specific keyboard conversions from scan codes */

#if defined(_WIN32)

#include <windows.h>

static UINT vk2scan(UINT vk)
{
        return MapVirtualKey(vk,0);
}
static uint8_t gtk2_keyevent_to_keycode(const GdkEventKey *ev)
{   
    return (uint8_t)vk2scan((UINT)(ev->hardware_keycode));
}

#else

static const uint8_t x_keycode_to_pc_keycode[61] = {
   0xc7,      /*  97  Home   */
   0xc8,      /*  98  Up     */
   0xc9,      /*  99  PgUp   */
   0xcb,      /* 100  Left   */
   0x4c,        /* 101  KP-5   */
   0xcd,      /* 102  Right  */
   0xcf,      /* 103  End    */
   0xd0,      /* 104  Down   */
   0xd1,      /* 105  PgDn   */
   0xd2,      /* 106  Ins    */
   0xd3,      /* 107  Del    */
   0x9c,      /* 108  Enter  */
   0x9d,      /* 109  Ctrl-R */
   0x0,       /* 110  Pause  */
   0xb7,      /* 111  Print  */
   0xb5,      /* 112  Divide */
   0xb8,      /* 113  Alt-R  */
   0xc6,      /* 114  Break  */   
   0x0,         /* 115 */
   0x0,         /* 116 */
   0x0,         /* 117 */
   0x0,         /* 118 */
   0x0,         /* 119 */
   0x70,         /* 120 Hiragana_Katakana */
   0x0,         /* 121 */
   0x0,         /* 122 */
   0x73,         /* 123 backslash */
   0x0,         /* 124 */
   0x0,         /* 125 */
   0x0,         /* 126 */
   0x0,         /* 127 */
   0x0,         /* 128 */
   0x79,         /* 129 Henkan */
   0x0,         /* 130 */
   0x7b,         /* 131 Muhenkan */
   0x0,         /* 132 */
   0x7d,         /* 133 Yen */
   0x0,         /* 134 */
   0x0,         /* 135 */
   0x47,         /* 136 KP_7 */
   0x48,         /* 137 KP_8 */
   0x49,         /* 138 KP_9 */
   0x4b,         /* 139 KP_4 */
   0x4c,         /* 140 KP_5 */
   0x4d,         /* 141 KP_6 */
   0x4f,         /* 142 KP_1 */
   0x50,         /* 143 KP_2 */
   0x51,         /* 144 KP_3 */
   0x52,         /* 145 KP_0 */
   0x53,         /* 146 KP_. */
   0x47,         /* 147 KP_HOME */
   0x48,         /* 148 KP_UP */
   0x49,         /* 149 KP_PgUp */
   0x4b,         /* 150 KP_Left */
   0x4c,         /* 151 KP_ */
   0x4d,         /* 152 KP_Right */
   0x4f,         /* 153 KP_End */
   0x50,         /* 154 KP_Down */
   0x51,         /* 155 KP_PgDn */
   0x52,         /* 156 KP_Ins */
   0x53,         /* 157 KP_Del */
};

static uint8_t gtk2_keyevent_to_keycode(const GdkEventKey *ev)
{
    int keycode;

    keycode = ev->hardware_keycode;

    if (keycode < 9) {
        keycode = 0;
    } else if (keycode < 97) {
        keycode -= 8; /* just an offset */
    } else if (keycode < 158) {
        /* use conversion table */
        keycode = x_keycode_to_pc_keycode[keycode - 97];
    } else {
        keycode = 0;
    }
    return keycode;
}

#endif

static void reset_keys(void)
{
    int i;
    for(i = 0; i < 256; i++) {
        if (modifiers_state[i]) {
            if (i & 0x80)
                kbd_put_keycode(0xe0);
            kbd_put_keycode(i | 0x80);
            modifiers_state[i] = 0;
        }
    }
}

/* convert GDK modifiers and invoke ugly hack to distinguish
between left and right shift/control/alt */
static guint gtk2_GetModState(const GdkEventKey *ev)
{
        guint key = 0, keyval = ev->keyval, state = ev->state;
        switch(keyval)
        {
                case GDK_Shift_L:
                        if (ev->type != GDK_KEY_RELEASE)
                                key |= gtkshiftleft;
                        keyval = 1;
                        break;
                case GDK_Shift_R:
                        if (ev->type != GDK_KEY_RELEASE)
                                key |= gtkshiftright;
                        keyval = 1;
                        break;
                case GDK_Control_L:
                        if (ev->type != GDK_KEY_RELEASE)
                                key |= gtkcontrolleft;
                        keyval = 2;
                        break;
                case GDK_Control_R:
                        if (ev->type != GDK_KEY_RELEASE)
                                key |= gtkcontrolright;
                        keyval = 2;
                        break;
                case GDK_Alt_L:
                        if (ev->type != GDK_KEY_RELEASE)
                                key |= gtkaltleft;
                        keyval = 3;
                        break;
                case GDK_Alt_R:
                        if (ev->type != GDK_KEY_RELEASE)
                                key |= gtkaltright;
                        keyval = 3;
                        break;
                case GDK_Caps_Lock:
                        if (ev->type != GDK_KEY_RELEASE)
                                key |= gtkcapslock;
                        keyval = 4;
                        break;
                default:
                        keyval = 0;
                        break;
        }
        if (keyval != 1 && (state & GDK_SHIFT_MASK))
        {
                if (modifiers_state[0x2a])
                        key |= gtkshiftleft;
                if (modifiers_state[0x36])
                        key |= gtkshiftright;
        }
        if (keyval != 2 && (state & GDK_CONTROL_MASK))
        {
                if (modifiers_state[0x1d])
                        key |= gtkcontrolleft;
                if (modifiers_state[0x9d])
                        key |= gtkcontrolright;
        }
        if (keyval != 3 && (state & GDK_MOD1_MASK)) /* fixme: need to do a 
check to make sure that alt is mapped to GDK_MOD1_MASK in the GDK_Keymap */
        {
                if (modifiers_state[0x38])
                        key |= gtkaltleft;
                if (modifiers_state[0xb8])
                        key |= gtkaltright;
        }
        if (keyval != 4 && (state & GDK_LOCK_MASK))
                key |= gtkcapslock;
        return key;
}

static void gtk2_process_key(GdkEventKey *ev)
{
    int keycode, v;

    if (ev->keyval == GDK_Pause) {
        /* specific case */
        v = 0;
        if (ev->type == GDK_KEY_RELEASE)
            v |= 0x80;
        kbd_put_keycode(0xe1);
        kbd_put_keycode(0x1d | v);
        kbd_put_keycode(0x45 | v);
        return;
    }

    if (kbd_layout) {
        keycode = gtk2_keyevent_to_keycode_generic(ev);
    } else {
        keycode = gtk2_keyevent_to_keycode(ev);
    }

    switch(keycode) {
    case 0x00:
        /* sent when leaving window: reset the modifiers state */
        reset_keys();
        return;
    case 0x2a:                          /* Left Shift */
    case 0x36:                          /* Right Shift */
    case 0x1d:                          /* Left CTRL */
    case 0x9d:                          /* Right CTRL */
    case 0x38:                          /* Left ALT */
    case 0xb8:                         /* Right ALT */
        if (ev->type == GDK_KEY_RELEASE)
            modifiers_state[keycode] = 0;
        else
            modifiers_state[keycode] = 1;
        break;
    case 0x45: /* num lock */
    case 0x3a: /* caps lock */
        /* GTK does send the key up event, so we dont generate it */
        /*kbd_put_keycode(keycode);
        kbd_put_keycode(keycode | 0x80);
        return;*/
        break;
    }

    /* now send the key code */
    if (keycode & 0x80)
        kbd_put_keycode(0xe0);
    if (ev->type == GDK_KEY_RELEASE)
        kbd_put_keycode(keycode | 0x80);
    else
        kbd_put_keycode(keycode & 0x7f);
}

static void gtk2_update_caption(void)
{
    char buf[1024];
    strcpy(buf, "QEMU Gtk");
    if (!vm_running) {
        strcat(buf, " [Stopped]");
    }
    if (gui_grab) {
        strcat(buf, " - Press Ctrl-Alt to exit grab");
    }
    gtk_window_set_title(GTK_WINDOW(screen), buf);
}

/* what a nasty hack. this should be a part of the GDK, not external!!! */
#include "gdk_set_window_pointer.c"

static void gtk2_grab_start(void)
{
    gint y;
    guint events;
    GdkModifierType state; /* dummy var */
    events = GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK | 
GDK_SCROLL_MASK | GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK;
    y = gdk_pointer_grab(screen->window, TRUE, events, screen->window, 
invisible_cursor, GDK_CURRENT_TIME);
    if (y)
        printf("GTK Warning - pointer grab failed!\n");
    y = gdk_keyboard_grab(screen->window, TRUE, GDK_CURRENT_TIME);
    if (y)
        printf("GTK Warning - keyboard grab failed!\n");
    /* do a dummy read to avoid moving mouse - set ox and oy to stay in sync */
    gdk_window_get_pointer(screen->window, &ox, &oy, &state);
    gui_grab = 1;
    gtk2_update_caption();
}

static void gtk2_grab_end(void)
{
    gdk_pointer_ungrab(GDK_CURRENT_TIME);
    gdk_keyboard_ungrab(GDK_CURRENT_TIME);
    gdk_window_set_pointer(screen->window, cx, cy);
    gui_grab = 0;
    gtk2_update_caption();
}

static gboolean gtk2_send_mouse_scroll(GtkWidget *wid, GdkEventScroll *ev)
{
    int x, y, dx, dy, dz, state, buttons;
    if (gui_grab)
    {

    x = ev->x;
    y = ev->y;
    state = ev->state;
    buttons = 0;
    dx = x - ox;
    dy = y - oy;
    ox = x;
    oy = y;
    buttons = 0;
    if ((state & GDK_BUTTON1_MASK))
        buttons |= MOUSE_EVENT_LBUTTON;
    if ((state & GDK_BUTTON3_MASK))
        buttons |= MOUSE_EVENT_RBUTTON;
    if ((state & GDK_BUTTON2_MASK))
        buttons |= MOUSE_EVENT_MBUTTON;
    /* test wheel - copied from Sebastien Bechet's gtk.c */
    dz = 0;
    if ((state & GDK_BUTTON4_MASK) || ev->direction == GDK_SCROLL_UP)
        dz--;
    if ((state & GDK_BUTTON5_MASK) || ev->direction == GDK_SCROLL_DOWN)
        dz++;
    kbd_mouse_event(dx, dy, dz, buttons);

    }
    return TRUE;
}

static gboolean gtk2_send_mouse_button(GtkWidget *wid, GdkEventButton *ev)
{
    int x, y, dx, dy, dz, state, buttons;
    if (ev->type == GDK_2BUTTON_PRESS || ev->type == GDK_3BUTTON_PRESS)
        return TRUE; /* double or triple click - superflurious - ignore */
    if (gui_grab)
    {

    x = ev->x;
    y = ev->y;
    state = ev->state;
    buttons = 0;
    dx = x - ox;
    dy = y - oy;
    ox = x;
    oy = y;
    buttons = 0;
    if ((state & GDK_BUTTON1_MASK) || ev->button == 1)
        buttons |= MOUSE_EVENT_LBUTTON;
    if ((state & GDK_BUTTON3_MASK) || ev->button == 3)
        buttons |= MOUSE_EVENT_RBUTTON;
    if ((state & GDK_BUTTON2_MASK) || ev->button == 2)
        buttons |= MOUSE_EVENT_MBUTTON;
    /* XXX: test wheel */
    dz = 0;
    if ((state & GDK_BUTTON4_MASK) || ev->button == 4)
        dz--;
    if ((state & GDK_BUTTON5_MASK) || ev->button == 5)
        dz++;
    kbd_mouse_event(dx, dy, dz, buttons);

    }
    else
    {

    if (ev->button == 1 && ev->type == GDK_BUTTON_PRESS)
    {
        /* start grabbing all events */
        gtk2_grab_start();
    }

    }
    return TRUE;
}

static gboolean gtk2_send_mouse_move(GtkWidget *wid, GdkEventMotion *ev)
{
    int x, y, dx, dy, dz, state, buttons;
    if (gui_grab)
    {

    if (ev->is_hint)
    {
        gdk_window_get_pointer(ev->window, &x, &y, (GdkModifierType*)&state);
    }
    else
    {
        x = ev->x;
        y = ev->y;
        state = ev->state;
    }
    dx = x - ox;
    dy = y - oy;
    if ((dx == 0) && (dy == 0)) return TRUE; // prevent infinite looping - 2.6.X
    ox = x;
    oy = y;
    buttons = 0;
    if (state & GDK_BUTTON1_MASK)
        buttons |= MOUSE_EVENT_LBUTTON;
    if (state & GDK_BUTTON3_MASK)
        buttons |= MOUSE_EVENT_RBUTTON;
    if (state & GDK_BUTTON2_MASK)
        buttons |= MOUSE_EVENT_MBUTTON;
    /* XXX: test wheel */
    dz = 0;
    if (state & GDK_BUTTON4_MASK)
        dz--;
    if (state & GDK_BUTTON5_MASK)
        dz++;

    /* wrap the x,y coordinates back onto the window */
    if (ev->x <= (cw/4))
        x = ((3*cw/4)-1);
    if (ev->y <= (ch/4))
        y = ((3*ch/4)-1);
    if (ev->x >= (3*cw/4))
        x = (cw/4)+1;
    if (ev->y >= (3*ch/4))
        y = (ch/4)+1;

    /* make internal mouse move invisible */
    ox = x;
    oy = y;

    gdk_window_set_pointer(screen->window, (gint)x, (gint)y);

    kbd_mouse_event(dx, dy, dz, buttons);

    }
    return TRUE;
}

static void toggle_full_screen(DisplayState *ds)
{
    gui_fullscreen = !gui_fullscreen;
    gtk2_resize(ds, image->width, image->height);
    if (gui_fullscreen) {
        gui_saved_grab = gui_grab;
        gtk2_grab_start();
        gtk_window_get_position(GTK_WINDOW(screen), &cx, &cy);
        /* ignore window manager decorations when in fullscreen mode */
        gtk_window_set_gravity(GTK_WINDOW(screen), GDK_GRAVITY_STATIC);
        gtk_window_move(GTK_WINDOW(screen), 0, 0);
        fullscreen_switch(cx, cy, ds->width, ds->height);
    } else {
        fullscreen_reset();
        gtk_window_set_gravity(GTK_WINDOW(screen), GDK_GRAVITY_NORTH_WEST);
        gtk_window_move(GTK_WINDOW(screen), cx, cy);
        if (!gui_saved_grab)
            gtk2_grab_end();
    }
    vga_invalidate_display();
    vga_update_display();
}

static gboolean gtk2_key_press(GtkWidget *wid, GdkEventKey *ev, DisplayState 
*ds)
{
        int mod_state;
            if (ev->type == GDK_KEY_PRESS) {
                mod_state = (gtk2_GetModState(ev) & (int)gui_grab_code) == 
(int)gui_grab_code;
                gui_key_modifier_pressed = mod_state;
                if (gui_key_modifier_pressed) {
                    int keycode;
                    keycode = gtk2_keyevent_to_keycode(ev);
                    switch(keycode) {
                    case 0x21: /* 'f' key on US keyboard */
                        toggle_full_screen(ds);
                        gui_keysym = 1;
                        break;
                    case 0x02 ... 0x0a: /* '1' to '9' keys */ 
                        console_select(keycode - 0x02);
                        if (is_active_console(vga_console)) {
                            /* tell the vga console to redisplay itself */
                            vga_invalidate_display();
                        } else {
                            /* display grab if going to a text console */
                            if (gui_grab)
                                gtk2_grab_end();
                        }
                        gui_keysym = 1;
                        break;
                    default:
                        break;
                    }
                } else if (!is_active_console(vga_console)) {
                    int keysym;
                    keysym = 0;
                    if (ev->state & GDK_CONTROL_MASK) {
                        switch(ev->keyval) {
                        case GDK_Up: keysym = QEMU_KEY_CTRL_UP; break;
                        case GDK_Down: keysym = QEMU_KEY_CTRL_DOWN; break;
                        case GDK_Left: keysym = QEMU_KEY_CTRL_LEFT; break;
                        case GDK_Right: keysym = QEMU_KEY_CTRL_RIGHT; break;
                        case GDK_Home: keysym = QEMU_KEY_CTRL_HOME; break;
                        case GDK_End: keysym = QEMU_KEY_CTRL_END; break;
                        case GDK_Page_Up: keysym = QEMU_KEY_CTRL_PAGEUP; break;
                        case GDK_Page_Down: keysym = QEMU_KEY_CTRL_PAGEDOWN; 
break;
                        default: break;
                        }
                    } else {
                        switch(ev->keyval) {
                        case GDK_Up: keysym = QEMU_KEY_UP; break;
                        case GDK_Down: keysym = QEMU_KEY_DOWN; break;
                        case GDK_Left: keysym = QEMU_KEY_LEFT; break;
                        case GDK_Right: keysym = QEMU_KEY_RIGHT; break;
                        case GDK_Home: keysym = QEMU_KEY_HOME; break;
                        case GDK_End: keysym = QEMU_KEY_END; break;
                        case GDK_Page_Up: keysym = QEMU_KEY_PAGEUP; break;
                        case GDK_Page_Down: keysym = QEMU_KEY_PAGEDOWN; break;
                        case GDK_BackSpace: keysym = QEMU_KEY_BACKSPACE; break;
                        case GDK_Delete: keysym = QEMU_KEY_DELETE; break;
                        default: break;
                        }
                    }
                    if (keysym) {
                        kbd_put_keysym(keysym);
                    } /*else if (ev->key.keysym.unicode != 0) {
                        kbd_put_keysym(ev->key.keysym.unicode);
                    }*/
                }
            } else if (ev->type == GDK_KEY_RELEASE) {
                mod_state = (gtk2_GetModState(ev) & gui_grab_code);
                if (!mod_state) {
                    if (gui_key_modifier_pressed) {
                        if (gui_keysym == 0) {
                            /* exit/enter grab if pressing Ctrl-Alt */
                            if (!gui_grab)
                                gtk2_grab_start();
                            else
                                gtk2_grab_end();
                            /* SDL does not send back all the
                               modifiers key, so we must correct it */
                            reset_keys();
                            return TRUE;
                        }
                        gui_key_modifier_pressed = 0;
                        gui_keysym = 0;
                    }
                }
            }
            if (is_active_console(vga_console)) 
                gtk2_process_key(ev);
        return TRUE;
}

static void gtk2_refresh(DisplayState *ds)
{
    if (last_vm_running != vm_running) {
        last_vm_running = vm_running;
        gtk2_update_caption();
    }
    if (ds->data != image->mem)
    {
        ds->data = image->mem;
    }

    if (is_active_console(vga_console))                                         
        vga_update_display();                                                   
    while (gtk_events_pending())
        gtk_main_iteration();
}

static void gtk2_cleanup(void) 
{
    gtk_main_quit();
    fullscreen_cleanup();
}

static gboolean gtk2_deletewin(void)
{
    /* signal qemu that its time to shut itself off - this is the place that we 
hook to trap attempts to close the main qemu window */
    qemu_system_shutdown_request();
    return FALSE;
    return TRUE; /* dont close the window right away! give qemu time to think */
}

static void gtk2_destroy(void)
{
    /* ideally we would call a hook here so qemu could clean itself up */
    gtk2_cleanup();
}

void gtk2_display_init(DisplayState *ds, int full_screen)
{
    int events;

#if defined(__APPLE__)
    /* always use generic keymaps */
    if (!keyboard_layout)
        keyboard_layout = "en-us";
#endif
    if(keyboard_layout) {
        kbd_layout = init_keyboard_layout(keyboard_layout);
        if (!kbd_layout)
            exit(1);
    }

    if (!gtk_init_check (0,NULL))
    {
        fprintf(stderr, "Could not load GTK\n");
        exit(0);
    }
    fullscreen_init();

/* note: adding GDK_DRAG_* and GDK_DROP_* would provide a mechanism for 
supporting drag and drop between host and guest */
    events = GDK_EXPOSURE_MASK | GDK_POINTER_MOTION_MASK | 
GDK_POINTER_MOTION_HINT_MASK | GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK 
| GDK_KEY_PRESS_MASK | GDK_KEY_RELEASE_MASK | GDK_ENTER_NOTIFY_MASK | 
GDK_LEAVE_NOTIFY_MASK | GDK_FOCUS_CHANGE_MASK | GDK_SCROLL_MASK | 
GDK_STRUCTURE_MASK;

    screen = gtk_window_new(GTK_WINDOW_TOPLEVEL);
    gtk_widget_set_events(screen, events);
    gtk_window_set_default_size(GTK_WINDOW(screen), 720, 400);
    gtk_widget_set_size_request(screen, 720, 400);

    g_signal_connect(G_OBJECT(screen), "delete_event", 
G_CALLBACK(gtk2_deletewin), NULL);
    g_signal_connect(G_OBJECT(screen), "destroy", G_CALLBACK(gtk2_destroy), 
NULL);
    gtk_container_set_border_width(GTK_CONTAINER(screen), 10);

    gtk_signal_connect(GTK_OBJECT(screen), "expose_event", (GtkSignalFunc) 
gtk2_expose, NULL);
    gtk_signal_connect(GTK_OBJECT(screen), "motion_notify_event", 
(GtkSignalFunc) gtk2_send_mouse_move, NULL);
    gtk_signal_connect(GTK_OBJECT(screen), "button_press_event", 
(GtkSignalFunc) gtk2_send_mouse_button, NULL);
    gtk_signal_connect(GTK_OBJECT(screen), "button_release_event", 
(GtkSignalFunc) gtk2_send_mouse_button, NULL);
    gtk_signal_connect(GTK_OBJECT(screen), "scroll_event", (GtkSignalFunc) 
gtk2_send_mouse_scroll, NULL);
    gtk_signal_connect(GTK_OBJECT(screen), "key_press_event", (GtkSignalFunc) 
gtk2_key_press, ds);
    gtk_signal_connect(GTK_OBJECT(screen), "key_release_event", (GtkSignalFunc) 
gtk2_key_press, ds);

    ds->dpy_update = gtk2_update;
    ds->dpy_resize = gtk2_resize;
    ds->dpy_refresh = gtk2_refresh;

    gchar nullpixdata[1] = { 0 };
    GdkColor nullcolor = { 0, 0, 0, 0 };
    GdkPixmap *invis = gdk_bitmap_create_from_data(screen->window, nullpixdata, 
1, 1);
    invisible_cursor = gdk_cursor_new_from_pixmap(invis, invis, &nullcolor, 
&nullcolor, 0, 0);

    gtk2_resize(ds, 720, 400);
    gtk2_update_caption();
    gui_grab = 0;

    gtk_window_set_policy(GTK_WINDOW(screen), FALSE, FALSE, FALSE);
    gtk_widget_show(screen);
    if (full_screen) {
        gui_fullscreen = 1;
        gui_fullscreen_initial_grab = 1;
        gtk2_grab_start();
    }
}
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