gala/lib/WindowIcon.vala

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Vala
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//
// Copyright (C) 2012 Tom Beckmann, Rico Tzschichholz
//
// 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 3 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, see <http://www.gnu.org/licenses/>.
//
namespace Gala {
/**
* Creates a new ClutterTexture with an icon for the window at the given size.
* This is recommended way to grab an icon for a window as this method will make
* sure the icon is updated if it becomes available at a later point.
*/
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public class WindowIcon : Clutter.Actor {
public Meta.Window window { get; construct; }
public int icon_size { get; construct; }
public int scale { get; construct; }
/**
* If set to true, the SafeWindowClone will destroy itself when the connected
* window is unmanaged
*/
public bool destroy_on_unmanaged {
get {
return _destroy_on_unmanaged;
}
construct set {
if (_destroy_on_unmanaged == value)
return;
_destroy_on_unmanaged = value;
if (_destroy_on_unmanaged)
window.unmanaged.connect (unmanaged);
else
window.unmanaged.disconnect (unmanaged);
}
}
bool _destroy_on_unmanaged = false;
/**
* Creates a new WindowIcon
*
* @param window The window for which to create the icon
* @param icon_size The size of the icon in pixels
* @param scale The desired scale of the icon
* @param destroy_on_unmanaged see destroy_on_unmanaged property
*/
public WindowIcon (Meta.Window window, int icon_size, int scale = 1, bool destroy_on_unmanaged = false) {
Object (window: window,
icon_size: icon_size,
destroy_on_unmanaged: destroy_on_unmanaged,
scale: scale);
}
construct {
width = icon_size * scale;
height = icon_size * scale;
update_texture (true);
}
void update_texture (bool initial) {
var pixbuf = Gala.Utils.get_icon_for_window (window, icon_size, scale);
try {
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var image = new Clutter.Image ();
Cogl.PixelFormat pixel_format = (pixbuf.get_has_alpha () ? Cogl.PixelFormat.RGBA_8888 : Cogl.PixelFormat.RGB_888);
image.set_data (pixbuf.get_pixels (), pixel_format, pixbuf.width, pixbuf.height, pixbuf.rowstride);
set_content (image);
} catch (Error e) {}
}
void unmanaged (Meta.Window window) {
destroy ();
}
}
}