1 files changed, 278 insertions, 0 deletions
diff --git a/src/tools/marco-mag.c b/src/tools/marco-mag.c
new file mode 100644
index 00000000..22c7cc3d
--- /dev/null
+++ b/src/tools/marco-mag.c
@@ -0,0 +1,278 @@
+/* Hack for use instead of xmag */
+
+/* 
+ * Copyright (C) 2002 Red Hat Inc.
+ * 
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program 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
+ * General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ */
+
+#define _GNU_SOURCE
+#define _XOPEN_SOURCE 600 /* C99 -- for rint() */
+
+#include <gtk/gtk.h>
+#include <gdk/gdkx.h>
+#include <gdk/gdkkeysyms.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <math.h>
+
+static GtkWidget *grab_widget = NULL;
+static GtkWidget *display_window = NULL;
+static int last_grab_x = 0;
+static int last_grab_y = 0;
+static int last_grab_width = 150;
+static int last_grab_height = 150;
+static GtkAllocation last_grab_allocation;
+static double width_factor = 4.0;
+static double height_factor = 4.0;
+static GdkInterpType interp_mode = GDK_INTERP_NEAREST;
+static guint regrab_idle_id = 0;
+
+static GdkPixbuf*
+get_pixbuf (void)
+{
+ GdkPixbuf *screenshot;
+ GdkPixbuf *magnified;
+
+#if 0
+ g_print ("Size %d x %d\n",
+ last_grab_width, last_grab_height);
+#endif
+ 
+ screenshot = gdk_pixbuf_get_from_drawable (NULL, gdk_get_default_root_window (),
+ NULL,
+ last_grab_x, last_grab_y, 0, 0,
+ last_grab_width, last_grab_height);
+
+ if (screenshot == NULL)
+ {
+ g_printerr ("Screenshot failed\n");
+ exit (1);
+ }
+
+ magnified = gdk_pixbuf_scale_simple (screenshot, last_grab_width * width_factor,
+ last_grab_height * height_factor,
+ interp_mode);
+
+
+ g_object_unref (G_OBJECT (screenshot));
+
+ return magnified;
+}
+
+static gboolean
+regrab_idle (GtkWidget *image)
+{
+ GdkPixbuf *magnified;
+ GtkAllocation allocation;
+
+ gtk_widget_get_allocation (image, &allocation);
+ 
+ if (allocation.width != last_grab_allocation.width ||
+ allocation.height != last_grab_allocation.height)
+ {
+ last_grab_width = rint (allocation.width / width_factor);
+ last_grab_height = rint (allocation.height / height_factor);
+ last_grab_allocation = allocation;
+ 
+ magnified = get_pixbuf ();
+
+ gtk_image_set_from_pixbuf (GTK_IMAGE (image), magnified);
+
+ g_object_unref (G_OBJECT (magnified));
+ }
+
+ regrab_idle_id = 0;
+ 
+ return FALSE;
+}
+
+static void
+image_resized (GtkWidget *image)
+{
+ if (regrab_idle_id == 0)
+ regrab_idle_id = g_idle_add_full (G_PRIORITY_LOW + 100, (GSourceFunc) regrab_idle,
+ image, NULL);
+}
+
+static void
+grab_area_at_mouse (GtkWidget *invisible,
+ int x_root,
+ int y_root)
+{
+ GdkPixbuf *magnified;
+ int width, height;
+ GtkWidget *widget;
+ 
+ width = last_grab_width;
+ height = last_grab_height;
+
+ last_grab_x = x_root;
+ last_grab_y = y_root;
+ last_grab_width = width;
+ last_grab_height = height;
+ 
+ magnified = get_pixbuf ();
+ 
+ display_window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
+ gtk_window_set_default_size (GTK_WINDOW (display_window),
+ last_grab_width, last_grab_height);
+ widget = gtk_image_new_from_pixbuf (magnified);
+ gtk_widget_set_size_request (widget, 40, 40);
+ gtk_container_add (GTK_CONTAINER (display_window), widget);
+ g_object_unref (G_OBJECT (magnified));
+
+ g_object_add_weak_pointer (G_OBJECT (display_window),
+ (gpointer) &display_window);
+
+ g_signal_connect (G_OBJECT (display_window), "destroy",
+ G_CALLBACK (gtk_main_quit), NULL);
+
+ g_signal_connect_after (G_OBJECT (widget), "size_allocate", G_CALLBACK (image_resized), NULL);
+ 
+ gtk_widget_show_all (display_window);
+}
+
+static void
+shutdown_grab (void)
+{
+ gdk_keyboard_ungrab (gtk_get_current_event_time ());
+ gdk_pointer_ungrab (gtk_get_current_event_time ());
+ gtk_grab_remove (grab_widget);
+}
+
+static void
+mouse_motion (GtkWidget *invisible,
+ GdkEventMotion *event,
+ gpointer data)
+{
+ 
+}
+
+static gboolean
+mouse_release (GtkWidget *invisible,
+ GdkEventButton *event,
+ gpointer data)
+{
+ if (event->button != 1)
+ return FALSE;
+
+ grab_area_at_mouse (invisible, event->x_root, event->y_root);
+
+ shutdown_grab ();
+ 
+ g_signal_handlers_disconnect_by_func (invisible, mouse_motion, NULL);
+ g_signal_handlers_disconnect_by_func (invisible, mouse_release, NULL);
+
+ return TRUE;
+}
+
+/* Helper Functions */
+
+static gboolean mouse_press (GtkWidget *invisible,
+ GdkEventButton *event,
+ gpointer data);
+
+static gboolean
+key_press (GtkWidget *invisible,
+ GdkEventKey *event,
+ gpointer data)
+{ 
+ if (event->keyval == GDK_Escape)
+ {
+ shutdown_grab ();
+
+ g_signal_handlers_disconnect_by_func (invisible, mouse_press, NULL);
+ g_signal_handlers_disconnect_by_func (invisible, key_press, NULL);
+ 
+ return TRUE;
+ }
+
+ return FALSE;
+}
+
+static gboolean
+mouse_press (GtkWidget *invisible,
+ GdkEventButton *event,
+ gpointer data)
+{ 
+ if (event->type == GDK_BUTTON_PRESS &&
+ event->button == 1)
+ {
+ g_signal_connect (invisible, "motion_notify_event",
+ G_CALLBACK (mouse_motion), NULL);
+ g_signal_connect (invisible, "button_release_event",
+ G_CALLBACK (mouse_release), NULL);
+ g_signal_handlers_disconnect_by_func (invisible, mouse_press, NULL);
+ g_signal_handlers_disconnect_by_func (invisible, key_press, NULL);
+ return TRUE;
+ }
+
+ return FALSE;
+}
+
+static void
+begin_area_grab (void)
+{
+ if (grab_widget == NULL)
+ {
+ grab_widget = gtk_invisible_new ();
+
+ gtk_widget_add_events (grab_widget,
+ GDK_BUTTON_RELEASE_MASK | GDK_BUTTON_PRESS_MASK | GDK_POINTER_MOTION_MASK);
+ 
+ gtk_widget_show (grab_widget);
+ }
+
+ if (gdk_keyboard_grab (gtk_widget_get_window (grab_widget),
+ FALSE,
+ gtk_get_current_event_time ()) != GDK_GRAB_SUCCESS)
+ {
+ g_warning ("Failed to grab keyboard to do eyedropper");
+ return;
+ }
+ 
+ if (gdk_pointer_grab (gtk_widget_get_window (grab_widget),
+ FALSE,
+ GDK_BUTTON_RELEASE_MASK | GDK_BUTTON_PRESS_MASK | GDK_POINTER_MOTION_MASK,
+ NULL,
+ NULL,
+ gtk_get_current_event_time ()) != GDK_GRAB_SUCCESS)
+ {
+ gdk_keyboard_ungrab (GDK_CURRENT_TIME);
+ g_warning ("Failed to grab pointer to do eyedropper");
+ return;
+ }
+
+ gtk_grab_add (grab_widget);
+ 
+ g_signal_connect (grab_widget, "button_press_event",
+ G_CALLBACK (mouse_press), NULL);
+ g_signal_connect (grab_widget, "key_press_event",
+ G_CALLBACK (key_press), NULL);
+}
+
+int
+main (int argc, char **argv)
+{
+ gtk_init (&argc, &argv);
+
+ begin_area_grab ();
+ 
+ gtk_main ();
+ 
+ return 0;
+}