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authorAlessandro Ghedini <al3xbio@gmail.com>2011-11-20 15:50:38 +0100
committerAlessandro Ghedini <al3xbio@gmail.com>2011-11-20 15:51:50 +0100
commit3997b71e281a5f43cc8c1892e85de30728df7b2d (patch)
tree96f2be7c48af03b7c540eba9dd6680eb270f23b8 /src/images/themedIcon.vala
parent902829c62f552f35517783570025b479745de3c5 (diff)
Imported Upstream version 0.3.1
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+/*
+Copyright (c) 2011 by Simon Schneegans
+
+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 GnomePie {
+
+/////////////////////////////////////////////////////////////////////////
+/// A class representing a square-shaped icon, themed according to the
+/// current theme of Gnome-Pie.
+/////////////////////////////////////////////////////////////////////////
+
+public class ThemedIcon : Image {
+
+ /////////////////////////////////////////////////////////////////////
+ /// A cache which stores loaded icon. The key is the icon name. When
+ /// the users icon theme or the theme of Gnome-Pie changes, these
+ /// cahces are cleared.
+ /////////////////////////////////////////////////////////////////////
+
+ private static Gee.HashMap<string, Cairo.ImageSurface?> active_cache { private get; private set; }
+ private static Gee.HashMap<string, Cairo.ImageSurface?> inactive_cache { private get; private set; }
+
+ /////////////////////////////////////////////////////////////////////
+ /// Initializes the caches.
+ /////////////////////////////////////////////////////////////////////
+
+ public static void init() {
+ clear_cache();
+
+ Config.global.notify["theme"].connect(() => {
+ clear_cache();
+ });
+
+ Gtk.IconTheme.get_default().changed.connect(() => {
+ clear_cache();
+ });
+ }
+
+ /////////////////////////////////////////////////////////////////////
+ /// Clears the cache.
+ /////////////////////////////////////////////////////////////////////
+
+ public static void clear_cache() {
+ active_cache = new Gee.HashMap<string, Cairo.ImageSurface?>();
+ inactive_cache = new Gee.HashMap<string, Cairo.ImageSurface?>();
+ }
+
+ /////////////////////////////////////////////////////////////////////
+ /// Paint a slice icon according to the current theme.
+ /////////////////////////////////////////////////////////////////////
+
+ public ThemedIcon(string icon_name, bool active) {
+ // check cache
+ var current_cache = active ? active_cache : inactive_cache;
+ var cached = current_cache.get(icon_name);
+
+ if (cached != null) {
+ this.surface = cached;
+ return;
+ }
+
+ // get layers for the desired slice type
+ var layers = active ? Config.global.theme.active_slice_layers : Config.global.theme.inactive_slice_layers;
+
+ // get max size
+ int size = 0;
+ foreach (var layer in layers) {
+ if (layer.image.width() > size) size = layer.image.width();
+ }
+
+ this.surface = new Cairo.ImageSurface(Cairo.Format.ARGB32, size, size);
+
+ // get size of icon layer
+ int icon_size = size;
+ foreach (var layer in layers) {
+ if (layer.is_icon) icon_size = layer.image.width();
+ }
+
+ Image icon;
+ if (icon_name.contains("/"))
+ icon = new Image.from_file_at_size(icon_name, icon_size, icon_size);
+ else
+ icon = new Icon(icon_name, icon_size);
+
+ var color = new Color.from_icon(icon);
+ var ctx = this.context();
+
+ ctx.translate(size/2, size/2);
+ ctx.set_operator(Cairo.Operator.OVER);
+
+ // now render all layers on top of each other
+ foreach (var layer in layers) {
+
+ if (layer.colorize) {
+ ctx.push_group();
+ }
+
+ if (layer.is_icon) {
+
+ ctx.push_group();
+
+ layer.image.paint_on(ctx);
+
+ ctx.set_operator(Cairo.Operator.IN);
+
+ if (layer.image.width() != icon_size) {
+ if (icon_name.contains("/"))
+ icon = new Image.from_file_at_size(icon_name, layer.image.width(), layer.image.width());
+ else
+ icon = new Icon(icon_name,layer.image.width());
+ }
+
+ icon.paint_on(ctx);
+
+ ctx.pop_group_to_source();
+ ctx.paint();
+ ctx.set_operator(Cairo.Operator.OVER);
+
+ } else {
+ layer.image.paint_on(ctx);
+ }
+
+ // colorize the whole layer if neccasary
+ if (layer.colorize) {
+ ctx.set_operator(Cairo.Operator.ATOP);
+ ctx.set_source_rgb(color.r, color.g, color.b);
+ ctx.paint();
+
+ ctx.set_operator(Cairo.Operator.OVER);
+ ctx.pop_group_to_source();
+ ctx.paint();
+ }
+ }
+
+ // store the surface in cache
+ current_cache.set(icon_name, this.surface);
+ }
+
+ /////////////////////////////////////////////////////////////////////
+ /// Returns the size of the icon in pixels. Greetings to Liskov.
+ /////////////////////////////////////////////////////////////////////
+
+ public int size() {
+ return base.width();
+ }
+}
+
+}