From d6b2677825cbb423e2099563c16321c3e23d7899 Mon Sep 17 00:00:00 2001 From: Alessandro Ghedini Date: Sun, 20 Nov 2011 15:50:38 +0100 Subject: Imported Upstream version 0.3.1 --- src/images/themedIcon.vala | 161 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 161 insertions(+) create mode 100644 src/images/themedIcon.vala (limited to 'src/images/themedIcon.vala') diff --git a/src/images/themedIcon.vala b/src/images/themedIcon.vala new file mode 100644 index 0000000..29ae380 --- /dev/null +++ b/src/images/themedIcon.vala @@ -0,0 +1,161 @@ +/* +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 . +*/ + +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 active_cache { private get; private set; } + private static Gee.HashMap 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(); + inactive_cache = new Gee.HashMap(); + } + + ///////////////////////////////////////////////////////////////////// + /// 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(); + } +} + +} -- cgit v1.2.3