/* testpaintablecursor.c
* Copyright ( C ) 2024 Red Hat , Inc .
* Author : Matthias Clasen
*
* This library is free software ; you can redistribute it and / or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation ; either
* version 2 of the License , or ( at your option ) any later version .
*
* This library is distributed in the hope that it will be useful ,
* but WITHOUT ANY WARRANTY ; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE . See the GNU
* Library General Public License for more details .
*
* You should have received a copy of the GNU Library General Public
* License along with this library . If not , see < http : //www.gnu.org/licenses/>.
*/
#include <gtk/gtk.h>
static GdkTexture *
cursor_callback (GdkCursor *cursor,
int cursor_size,
double scale,
int *width,
int *height,
int *hotspot_x,
int *hotspot_y,
gpointer data)
{
GdkPixbuf *pixbuf;
GdkTexture *texture;
GError *error = NULL;
int scaled_size;
scaled_size = ceil (cursor_size * scale);
g_print ("cursor size %d scale %g\n" , cursor_size, scale);
g_print ("resulting pixels %d x %d\n" , scaled_size, scaled_size);
pixbuf = gdk_pixbuf_new_from_file_at_size ((const char *)data,
scaled_size, scaled_size,
&error);
if (!pixbuf)
{
g_print ("%s\n" , error->message);
g_error_free (error);
return NULL;
}
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
texture = gdk_texture_new_for_pixbuf (pixbuf);
G_GNUC_END_IGNORE_DEPRECATIONS
g_object_unref (pixbuf);
*width = cursor_size;
*height = cursor_size;
*hotspot_x = 0 ;
*hotspot_y = 0 ;
return texture;
}
int
main (int argc, char *argv[])
{
GtkWidget *window, *button;
gboolean done = FALSE ;
GdkCursor *cursor;
gtk_init ();
window = gtk_window_new ();
gtk_window_set_title (GTK_WINDOW (window), "hello world" );
gtk_window_set_resizable (GTK_WINDOW (window), FALSE );
button = gtk_button_new ();
gtk_button_set_label (GTK_BUTTON (button), "hello world" );
gtk_widget_set_margin_top (button, 10 );
gtk_widget_set_margin_bottom (button, 10 );
gtk_widget_set_margin_start (button, 10 );
gtk_widget_set_margin_end (button, 10 );
cursor = gdk_cursor_new_from_callback (cursor_callback,
(gpointer) "docs/reference/gsk/gtk-logo.svg" , NULL,
gdk_cursor_new_from_name ("default" , NULL));
gtk_widget_set_cursor (button, cursor);
g_object_unref (cursor);
gtk_window_set_child (GTK_WINDOW (window), button);
gtk_window_present (GTK_WINDOW (window));
while (!done)
g_main_context_iteration (NULL, TRUE );
return 0 ;
}
Messung V0.5 in Prozent C=98 H=95 G=96
¤ Dauer der Verarbeitung: 0.10 Sekunden
(vorverarbeitet am 2026-07-02)
¤
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