Pileus Git - ~andy/gtk/blob - demos/testpixbuf-drawable.c

   1 #include <config.h>
   2 #include <gtk/gtk.h>
   3 #ifdef GDK_WINDOWING_X11
   4 #include <gdk/x11/gdkx.h>
   5 #elif defined (GDK_WINDOWING_WIN32)
   6 #include <gdk/win32/gdkwin32.h>
   7 #endif
   8
   9 int close_app(GtkWidget *widget, gpointer data)
  10 {
  11    gtk_main_quit();
  12    return TRUE;
  13 }
  14
  15 int expose_cb(GtkWidget *drawing_area, GdkEventExpose *evt, gpointer data)
  16 {
  17    GdkPixbuf *pixbuf;
  18
  19    pixbuf = (GdkPixbuf *) gtk_object_get_data(GTK_OBJECT(drawing_area),
  20                                               "pixbuf");
  21    if(gdk_pixbuf_get_has_alpha (pixbuf))
  22    {
  23       gdk_draw_rgb_32_image(drawing_area->window,
  24                             drawing_area->style->black_gc,
  25                             evt->area.x, evt->area.y,
  26                             evt->area.width,
  27                             evt->area.height,
  28                             GDK_RGB_DITHER_MAX,
  29                             gdk_pixbuf_get_pixels (pixbuf) +
  30                             (evt->area.y * gdk_pixbuf_get_rowstride (pixbuf)) +
  31                             (evt->area.x * gdk_pixbuf_get_n_channels (pixbuf)),
  32                             gdk_pixbuf_get_rowstride (pixbuf));
  33    }
  34    else
  35    {
  36       gdk_draw_rgb_image(drawing_area->window,
  37                          drawing_area->style->black_gc,
  38                          evt->area.x, evt->area.y,
  39                          evt->area.width,
  40                          evt->area.height,
  41                          GDK_RGB_DITHER_NORMAL,
  42                          gdk_pixbuf_get_pixels (pixbuf) +
  43                          (evt->area.y * gdk_pixbuf_get_rowstride (pixbuf)) +
  44                          (evt->area.x * gdk_pixbuf_get_n_channels (pixbuf)),
  45                          gdk_pixbuf_get_rowstride (pixbuf));
  46    }
  47    return FALSE;
  48 }
  49
  50 int configure_cb(GtkWidget *drawing_area, GdkEventConfigure *evt, gpointer data)
  51 {
  52    GdkPixbuf *pixbuf;
  53
  54    pixbuf = (GdkPixbuf *) gtk_object_get_data(GTK_OBJECT(drawing_area),
  55                                               "pixbuf");
  56
  57    g_print("X:%d Y:%d\n", evt->width, evt->height);
  58    if(evt->width != gdk_pixbuf_get_width (pixbuf) || evt->height != gdk_pixbuf_get_height (pixbuf))
  59    {
  60       GdkWindow *root;
  61       GdkPixbuf *new_pixbuf;
  62
  63       root = GDK_ROOT_PARENT();
  64       new_pixbuf = gdk_pixbuf_get_from_drawable(NULL, root, NULL,
  65                                                 0, 0, 0, 0, evt->width, evt->height);
  66       gtk_object_set_data(GTK_OBJECT(drawing_area), "pixbuf", new_pixbuf);
  67       gdk_pixbuf_unref(pixbuf);
  68    }
  69
  70    return FALSE;
  71 }
  72
  73 extern void pixbuf_init();
  74
  75 int main(int argc, char **argv)
  76 {
  77    GdkWindow     *root;
  78    GtkWidget     *window;
  79    GtkWidget     *vbox;
  80    GtkWidget     *drawing_area;
  81    GdkPixbuf     *pixbuf;
  82
  83    pixbuf_init ();
  84
  85    gtk_init(&argc, &argv);
  86    gdk_rgb_set_verbose(TRUE);
  87    gdk_rgb_init();
  88
  89    gtk_widget_set_default_colormap(gdk_rgb_get_cmap());
  90
  91    root = GDK_ROOT_PARENT();
  92    pixbuf = gdk_pixbuf_get_from_drawable(NULL, root, NULL,
  93                                          0, 0, 0, 0, 150, 160);
  94
  95    window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
  96    gtk_signal_connect(GTK_OBJECT(window), "delete_event",
  97                       GTK_SIGNAL_FUNC(close_app), NULL);
  98    gtk_signal_connect(GTK_OBJECT(window), "destroy",
  99                       GTK_SIGNAL_FUNC(close_app), NULL);
 100
 101    vbox = gtk_vbox_new(FALSE, 0);
 102    gtk_container_add(GTK_CONTAINER(window), vbox);
 103
 104    drawing_area = gtk_drawing_area_new();
 105    gtk_widget_set_usize(GTK_WIDGET(drawing_area),
 106                         gdk_pixbuf_get_width (pixbuf),
 107                         gdk_pixbuf_get_height (pixbuf));
 108    gtk_signal_connect(GTK_OBJECT(drawing_area), "expose_event",
 109                       GTK_SIGNAL_FUNC(expose_cb), NULL);
 110
 111    gtk_signal_connect(GTK_OBJECT(drawing_area), "configure_event",
 112                       GTK_SIGNAL_FUNC(configure_cb), NULL);
 113    gtk_object_set_data(GTK_OBJECT(drawing_area), "pixbuf", pixbuf);
 114    gtk_box_pack_start(GTK_BOX(vbox), drawing_area, TRUE, TRUE, 0);
 115
 116    gtk_widget_show_all(window);
 117    gtk_main();
 118    return 0;
 119 }