/*Hi .. I have modified scribble-simple.c from gtk/examples to check the
behaviour of foregrond/background color of this application over X and then
over DFB. in expose_event() I have set the new foreground color, it is working
fine over X but over DirectFB it doesn't has any effect... any
reason/explanation..*/
#include stdlib.h
#include gtk/gtk.h
/* Backing pixmap for drawing area */
static GdkPixmap *pixmap = NULL;
/* Create a new backing pixmap of the appropriate size */
static gboolean configure_event( GtkWidget *widget,
GdkEventConfigure *event )
{
GdkColor color;
if (pixmap)
g_object_unref (pixmap);
color.red = 0x;
color.green = 0x;
color.blue = 0x0;
gdk_gc_set_rgb_fg_color (widget-style-white_gc, color);
pixmap = gdk_pixmap_new (widget-window,
widget-allocation.width,
widget-allocation.height,
-1);
gdk_draw_rectangle (pixmap,
widget-style-white_gc,
TRUE,
0, 0,
widget-allocation.width,
widget-allocation.height);
return TRUE;
}
/* Redraw the screen from the backing pixmap */
static gboolean expose_event( GtkWidget *widget,
GdkEventExpose *event )
{
GdkColor color;
color.red = 0x;
gdk_gc_set_rgb_fg_color (widget-style-fg_gc[GTK_WIDGET_STATE(widget)],
color);
gdk_draw_drawable (widget-window,
widget-style-fg_gc[GTK_WIDGET_STATE (widget)],
pixmap,
event-area.x, event-area.y,
event-area.x, event-area.y,
event-area.width, event-area.height);
return FALSE;
}
/* Draw a rectangle on the screen */
static void draw_brush( GtkWidget *widget,
gdoublex,
gdoubley)
{
GdkRectangle update_rect;
update_rect.x = x - 5;
update_rect.y = y - 5;
update_rect.width = 10;
update_rect.height = 10;
gdk_draw_rectangle (pixmap,
widget-style-black_gc,
TRUE,
update_rect.x, update_rect.y,
update_rect.width, update_rect.height);
gtk_widget_queue_draw_area (widget,
update_rect.x, update_rect.y,
update_rect.width, update_rect.height);
}
static gboolean button_press_event( GtkWidget *widget,
GdkEventButton *event )
{
if (event-button == 1 pixmap != NULL)
draw_brush (widget, event-x, event-y);
return TRUE;
}
static gboolean motion_notify_event( GtkWidget *widget,
GdkEventMotion *event )
{
int x, y;
GdkModifierType state;
if (event-is_hint)
gdk_window_get_pointer (event-window, x, y, state);
else
{
x = event-x;
y = event-y;
state = event-state;
}
if (state GDK_BUTTON1_MASK pixmap != NULL)
draw_brush (widget, x, y);
return TRUE;
}
void quit ()
{
exit (0);
}
int main( int argc,
char *argv[] )
{
GtkWidget *window;
GtkWidget *drawing_area;
GtkWidget *vbox;
GtkWidget *button;
gtk_init (argc, argv);
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
gtk_widget_set_name (window, Test Input);
vbox = gtk_vbox_new (FALSE, 0);
gtk_container_add (GTK_CONTAINER (window), vbox);
gtk_widget_show (vbox);
g_signal_connect (G_OBJECT (window), destroy,
G_CALLBACK (quit), NULL);
/* Create the drawing area */
drawing_area = gtk_drawing_area_new ();
gtk_widget_set_size_request (GTK_WIDGET (drawing_area), 200, 200);
gtk_box_pack_start (GTK_BOX (vbox), drawing_area, TRUE, TRUE, 0);
gtk_widget_show (drawing_area);
/* Signals used to handle backing pixmap */
g_signal_connect (G_OBJECT (drawing_area), expose_event,
G_CALLBACK (expose_event), NULL);
g_signal_connect (G_OBJECT (drawing_area),configure_event,
G_CALLBACK (configure_event), NULL);
/* Event signals */
g_signal_connect (G_OBJECT (drawing_area), motion_notify_event,
G_CALLBACK (motion_notify_event), NULL);
g_signal_connect (G_OBJECT (drawing_area), button_press_event,
G_CALLBACK (button_press_event), NULL);
gtk_widget_set_events (drawing_area, GDK_EXPOSURE_MASK
| GDK_LEAVE_NOTIFY_MASK
| GDK_BUTTON_PRESS_MASK
| GDK_POINTER_MOTION_MASK
| GDK_POINTER_MOTION_HINT_MASK);
/* .. And a quit button */
button = gtk_button_new_with_label (Quit);
gtk_box_pack_start (GTK_BOX (vbox), button, FALSE, FALSE, 0);
g_signal_connect_swapped (G_OBJECT (button), clicked,
