Hi Pritesh,
This is the program which works the way you expect it i.e it will show only
the image(Shaped Widget). I got it running by modifying the GTK example.
Hope it works. Note that you have to use 255 as Threshold Alpha and
gtk_pixmap_new() is outdated(i think so).
Also, you should get assertion for the following line as the image type is
not "pixmap" from file.
>>pixbuf = gtk_image_get_pixbuf(GTK_WIDGET(image));
#include<stdlib.h>
#include <gtk/gtk.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
/* When invoked (via signal delete_event), terminates the application */
gint close_application( GtkWidget *widget,
GdkEvent *event,
gpointer data )
{
gtk_main_quit();
return(FALSE);
}
int main (int argc,
char *argv[] )
{
/* GtkWidget is the storage type for widgets */
GtkWidget *window, *fixed;
GdkPixmap *gdk_pixmap;
//SID
GtkWidget *s_image;
GdkPixbuf *s_pixbuf;
GdkBitmap *s_alpha;
//END
/* Create the main window, and attach delete_event signal to terminate
* the application. Note that the main window will not have a titlebar
* since we're making it a popup. */
gtk_init (&argc, &argv);
window = gtk_window_new (GTK_WINDOW_POPUP);
g_signal_connect (G_OBJECT (window), "delete_event",
G_CALLBACK (close_application), NULL);
gtk_widget_show (window);
//SID
g_print("\nSetting gtk_image_new_from_file()...\n");
s_image = gtk_image_new_from_file("my.png");
//GDK-PIXBUF
g_print("\nSetting gdk_pixbuf_new_from_file()...\n");
s_pixbuf = gdk_pixbuf_new_from_file("my.png", NULL);
s_alpha = (GdkBitmap *)malloc(160*160*sizeof(GdkBitmap));
g_print("\nCalling gdk_pixbuf_render_threshold_alpha()...\n");
gdk_pixbuf_render_pixmap_and_mask(s_pixbuf, &gdk_pixmap, &s_alpha,255);
g_print("\nCalled gdk_pixbuf_render_threshold_alpha()...\n");
gtk_widget_show(s_image);
/* To display the pixmap, we use a fixed widget to place the pixmap */
fixed = gtk_fixed_new ();
gtk_widget_set_size_request (fixed, 200, 200);
gtk_fixed_put (GTK_FIXED (fixed), s_image, 0, 0);
gtk_container_add (GTK_CONTAINER (window), fixed);
gtk_widget_show (fixed);
/* This masks out everything except for the image itself */
g_print("\nCalling gtk_widget_shape_combine_mask()...\n");
gtk_widget_shape_combine_mask (window, s_alpha, 0, 0);
g_print("\nCalled gdk_widget_shape_combine_mask()...\n");
/* show the window */
gtk_widget_show (window);
gtk_main ();
return 0;
}
Regards,
Siddharth
TATA Elxsi
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of Pritesh Kumar
Sent: Wednesday, January 24, 2007 7:30 PM
To: gtk-app-devel-list@gnome.org
Subject: widget appearance getting corrupted
here is my code snippet for displaying a shaped widget .
void create_playerbar()
{
GtkWidget *image ,*window, *pixwid;
GdkPixbuf *pixbuf ;
GdkPixmap *pixmap;
GdkBitmap *bitmap;
int alpha;
alpha = 32;
window = gtk_window_new(GTK_WINDOW_POPUP);
image = gtk_image_new_from_file("/xyz.png");
pixbuf = gtk_image_get_pixbuf(GTK_WIDGET(image));
gdk_pixbuf_render_pixmap_and_mask(pixbuf, &pixmap, &bitmap,alpha);
pixwid = gtk_pixmap_new(pixmap,bitmap);
gtk_container_add(GTK_CONTAINER(window),pixwid);
gtk_widget_shape_combine_mask(window,bitmap,0,0);
gtk_window_set_transient_for(GTK_WINDOW(window), GTK_WINDOW(topwindow));
}
but whenever i do gtk_widget_show_all(GTK_WIDGET(window)) , corrupted
widget comes up on the screen. The appearance of the png image inside the
window (widget)
gets corrupted . Every time it shows up some different color for the
widget. However if i repeat closing the application and opening it for 3-4
times , then the widget shows up correctly with proper image
appearance(maintaining the color appearance of png image).
but this problem does not occur on fc3 . it occurs on fc6 frequently.
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