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