Hi,
> Yes, it looks like that ('g' or 'g->pixmap' is/are probably the source
> of your problem). From the sample you've posted it's unclear how you
> allocate and fill a 'typGraphics' structures. You have to do this in
> "configure-event" callback.
Yes, my configure-event make it...
static gint configure_event (GtkWidget *widget, GdkEventConfigure *event,
typGraphics *g)
{
if (g == NULL) {
g = NewGraphics ();
}
/* --- Free the pixmap --- */
if (g->pixmap) {
gdk_pixmap_unref (g->pixmap);
}
/* --- Create a new pixmap --- */
g->pixmap = gdk_pixmap_new (widget->window,
widget->allocation.width,
widget->allocation.height,
-1);
/* --- if we don't have our pens yet --- */
if (penBlack == NULL) {
/* --- Get our colorful pens. --- */
penBlack = GetPen (NewColor (0, 0, 0),g);
penRed = GetPen (NewColor (0xffff, 0, 0),g);
penBlue = GetPen (NewColor (0, 0, 0xffff),g);
penGreen = GetPen (NewColor (0, 0xffff, 0),g);
penGray = GetPen (NewColor (0x9000, 0x9000, 0x9000),g);
}
/* --- Clear it out --- */
gdk_draw_rectangle (g->pixmap,
widget->style->white_gc,
TRUE,
0, 0,
widget->allocation.width,
widget->allocation.height);
return TRUE;
}
and internal functions used ....
GdkGC *GetPen (GdkColor *c, typGraphics *g)
{
GdkGC *gc;
/* --- Create a gc --- */
gc = gdk_gc_new (g->pixmap);
/* --- Set the forground to the color --- */
gdk_gc_set_foreground (gc, c);
/* --- Return it. --- */
return (gc);
}
GdkColor *NewColor (long red, long green, long blue)
{
/* --- Get the color --- */
GdkColor *c = (GdkColor *) g_malloc (sizeof (GdkColor));
/* --- Fill it in. --- */
c->red = red;
c->green = green;
c->blue = blue;
gdk_color_alloc (gdk_colormap_get_system (), c);
return (c);
}
Thanks
France
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