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/*
* © 2011 Joachim Breitner <mail@joachim-breitner.de>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <gtk/gtk.h>
#include <gdk/gdkx.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <clientwin.h>
GdkAtom pdfscreenshot_atom;
char *supported_str = "supported";
GtkWindow *main_window;
/*
* This is called once a window has been clicked.
*/
gboolean
pdfscreenshot_window_selected(GtkWidget *grab_window,
GdkEventButton *event,
GtkButton *button)
{
// Release the pointer
gdk_pointer_ungrab(event->time);
// Un-Press the button (we inhibited the button-release signal in
// pdfscreenshot_select_window
gtk_button_released(GTK_BUTTON(button));
// Use Xlib to find out what window is below the button
Window selected_window = None;
int dummy;
unsigned int dummyU;
Window dummyW;
XQueryPointer(gdk_x11_get_default_xdisplay(),
gdk_x11_get_default_root_xwindow(),
&dummyW, &selected_window, &dummy, &dummy, &dummy, &dummy, &dummyU);
// Find the "right" window the same way xwininfo does
selected_window = Find_Client(gdk_x11_get_default_xdisplay(),
gdk_x11_get_default_root_xwindow(),
selected_window);
if (selected_window != None) {
// Now we check if the window has the GTK_VECTOR_SCREENSHOT atom set
XTextProperty supported;
XGetTextProperty(gdk_x11_get_default_xdisplay(),
selected_window,
&supported,
gdk_x11_atom_to_xatom(pdfscreenshot_atom));
if (supported.value != NULL) {
// Send the GTK_VECTOR_SCREENSHOT ClientMessage to the window. It
// is important to set xevent.window, as X does not do it by
// itself.
XClientMessageEvent xevent;
xevent.type = ClientMessage;
xevent.message_type = gdk_x11_atom_to_xatom(pdfscreenshot_atom);
xevent.format = 32;
xevent.window = selected_window;
XSendEvent(gdk_x11_get_default_xdisplay(), selected_window, 0, 0, (XEvent *)&xevent);
return TRUE;
}
}
// If we reach here, then the window does not support taking vector screenshots.
GtkWidget *dialog = gtk_message_dialog_new (main_window,
GTK_DIALOG_DESTROY_WITH_PARENT,
GTK_MESSAGE_ERROR,
GTK_BUTTONS_CLOSE,
"The selected window does not support taking vector screenshots. Is it "
"a gtk-3 based application, and did you load the gtk-vector-screenshot "
"module?");
gtk_dialog_run (GTK_DIALOG (dialog));
gtk_widget_destroy (dialog);
return TRUE;
}
/*
* Called when the main button is pressed.
*/
gboolean
pdfscreenshot_select_window(GtkWidget *button, GdkEvent *event, GtkWidget *grab_window)
{
GdkEventMask events = GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK;
// Create a crosshair cursor
GdkCursor *cursor = gdk_cursor_new_for_display(
gtk_widget_get_display(button), GDK_CROSSHAIR);
// And grab the input device, so that all further events are passed to the
// grab_window
gdk_device_grab(
gdk_event_get_device(event),
gtk_widget_get_window(grab_window),
GDK_OWNERSHIP_APPLICATION,
FALSE,
events,
cursor,
event->button.time);
gdk_cursor_unref(cursor);
return TRUE;
}
/*
* The main window, with the one button.
*/
void
pdfscreenshot_window_create()
{
// Is that icon always installed or do we have to ship it?
GtkWidget *icon = gtk_image_new_from_icon_name ("camera",GTK_ICON_SIZE_BUTTON);
gtk_image_set_pixel_size(GTK_IMAGE(icon), 128);
GtkWidget *button = gtk_button_new_with_label("Take vector screenshot...");
gtk_button_set_image (GTK_BUTTON(button), icon);
gtk_button_set_image_position (GTK_BUTTON(button), GTK_POS_TOP);
gtk_widget_set_tooltip_text (button,
"Click this button and then an application window to take "
"a vector screenshot of it.");
GtkWidget *window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
gtk_window_set_icon_name(GTK_WINDOW(window),"camera");
gtk_window_set_title(GTK_WINDOW(window),"Vector screenshot taker");
gtk_window_set_resizable(GTK_WINDOW(window), FALSE);
gtk_window_set_keep_above(GTK_WINDOW(window),TRUE);
gtk_container_add(GTK_CONTAINER(window), button);
gtk_widget_show_all(GTK_WIDGET(window));
main_window = window;
// Create a dummy window for the pointer grab
// (maybe try to remove this later)
GdkEventMask events = GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK | GDK_POINTER_MOTION_MASK;
GtkWidget *grab_window = gtk_window_new(GTK_WINDOW_POPUP);
gtk_widget_show(grab_window);
gtk_window_resize(GTK_WINDOW(grab_window), 1, 1);
gtk_window_move(GTK_WINDOW(grab_window), -100, -100);
gtk_widget_add_events(grab_window, events);
g_signal_connect(G_OBJECT(grab_window), "button_release_event",
G_CALLBACK(pdfscreenshot_window_selected), button);
g_signal_connect(G_OBJECT(button), "button_release_event",
G_CALLBACK(pdfscreenshot_select_window), grab_window);
}
int
main(gint argc, char *argv[])
{
gtk_init(&argc, &argv);
pdfscreenshot_atom = gdk_atom_intern ("GTK_VECTOR_SCREENSHOT", FALSE);
pdfscreenshot_window_create();
gtk_main();
return 0;
}
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