Imported Upstream version 0.2+gitdfdad95upstream/0.2+gitdfdad95

1 files changed, 182 insertions, 0 deletions

diff --git a/src/renderers/sliceRenderer.vala b/src/renderers/sliceRenderer.vala
new file mode 100644
index 0000000..08c880f
--- /dev/null
+++ b/src/renderers/sliceRenderer.vala
@@ -0,0 +1,182 @@
+/* 
+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/>. 
+*/
+
+using GLib.Math;
+
+namespace GnomePie {
+
+// Renders a Slice of a Pie. According to the current theme.
+
+public class SliceRenderer : GLib.Object {
+
+    public bool active {get; private set; default = false;}
+    public Image caption {get; private set;}
+    public Color color {get; private set;}
+    
+    private Image active_icon;
+    private Image inactive_icon;
+    private Image hotkey;
+    
+    private Action action;
+
+    private unowned PieRenderer parent;    
+    private int position;
+    
+    private AnimatedValue fade;
+    private AnimatedValue scale;
+    private AnimatedValue alpha;
+    private AnimatedValue fade_rotation;
+    private AnimatedValue fade_scale;
+
+    public SliceRenderer(PieRenderer parent) {
+        this.parent = parent;
+       
+        this.fade =  new AnimatedValue.linear(0.0, 0.0, Config.global.theme.transition_time);
+        this.alpha = new AnimatedValue.linear(0.0, 1.0, Config.global.theme.fade_in_time);
+        this.scale = new AnimatedValue.cubic(AnimatedValue.Direction.OUT, 
+                                                 1.0/Config.global.theme.max_zoom, 
+                                                 1.0/Config.global.theme.max_zoom, 
+                                                 Config.global.theme.transition_time, 
+                                                 Config.global.theme.springiness);
+        this.fade_scale = new AnimatedValue.cubic(AnimatedValue.Direction.OUT, 
+                                                 Config.global.theme.fade_in_zoom, 1.0, 
+                                                 Config.global.theme.fade_in_time, 
+                                                 Config.global.theme.springiness);
+        this.fade_rotation = new AnimatedValue.cubic(AnimatedValue.Direction.OUT, 
+                                                 Config.global.theme.fade_in_rotation, 0.0, 
+                                                 Config.global.theme.fade_in_time);
+    }
+
+    public void load(Action action, int position) {
+        this.position = position;
+        this.action = action;
+        
+    
+        if (Config.global.theme.caption)
+            this.caption = new RenderedText(action.name, 
+                                            Config.global.theme.caption_width,
+                                            Config.global.theme.caption_height,
+                                            Config.global.theme.caption_font);
+            
+        this.active_icon = new ThemedIcon(action.icon, true);
+        this.inactive_icon = new ThemedIcon(action.icon, false);
+        
+        this.color = new Color.from_icon(this.active_icon);
+        
+        string hotkey_label = "";
+        if (position < 10) {
+            hotkey_label = "%u".printf(position);
+        } else if (position < 36) {
+            hotkey_label = "%c".printf((char)(55 + position));
+        }
+        
+        this.hotkey = new RenderedText(hotkey_label, (int)Config.global.theme.slice_radius*2,
+                         (int)Config.global.theme.slice_radius*2, "sans 20");
+    }
+    
+    public void activate() {
+        action.activate();
+    }
+    
+    public void fade_out() {
+        this.alpha.reset_target(0.0, Config.global.theme.fade_out_time);
+        this.fade_scale = new AnimatedValue.cubic(AnimatedValue.Direction.IN, 
+                                             this.fade_scale.val, 
+                                             Config.global.theme.fade_out_zoom, 
+                                             Config.global.theme.fade_out_time, 
+                                             Config.global.theme.springiness);
+        this.fade_rotation = new AnimatedValue.cubic(AnimatedValue.Direction.IN, 
+                                             this.fade_rotation.val, 
+                                             Config.global.theme.fade_out_rotation, 
+                                             Config.global.theme.fade_out_time);
+    }
+    
+    public void set_active_slice(SliceRenderer? active_slice) {
+       if (active_slice == this) {
+            this.fade.reset_target(1.0, Config.global.theme.transition_time);
+        } else {
+            this.fade.reset_target(0.0, Config.global.theme.transition_time);
+        }
+    }
+
+    public void draw(double frame_time, Cairo.Context ctx, double angle, double distance) {
+	    
+	    double direction = 2.0 * PI * position/parent.slice_count() + this.fade_rotation.val;
+	    double max_scale = 1.0/Config.global.theme.max_zoom;
+        double diff = fabs(angle-direction);
+        
+        if (diff > PI)
+	        diff = 2 * PI - diff;
+
+        if (diff < 2 * PI * Config.global.theme.zoom_range)
+            max_scale = (Config.global.theme.max_zoom/(diff * (Config.global.theme.max_zoom - 1)
+                        /(2 * PI * Config.global.theme.zoom_range) + 1))
+                        /Config.global.theme.max_zoom;
+	    
+	    active = ((parent.active_slice >= 0) && (diff < PI/parent.slice_count()));
+        
+        max_scale = (parent.active_slice >= 0 ? max_scale : 1.0/Config.global.theme.max_zoom);
+        
+        if (fabs(this.scale.end - max_scale) > Config.global.theme.max_zoom*0.005)
+            this.scale.reset_target(max_scale, Config.global.theme.transition_time);
+        
+        this.scale.update(frame_time);
+        this.alpha.update(frame_time);
+        this.fade.update(frame_time);
+        this.fade_scale.update(frame_time);
+        this.fade_rotation.update(frame_time);
+	    
+        ctx.save();
+        
+        double radius = Config.global.theme.radius;
+        
+        if (atan((Config.global.theme.slice_radius+Config.global.theme.slice_gap)
+          /(radius/Config.global.theme.max_zoom)) > PI/parent.slice_count()) {
+            radius = (Config.global.theme.slice_radius+Config.global.theme.slice_gap)
+                     /tan(PI/parent.slice_count())*Config.global.theme.max_zoom;
+        }
+        
+        ctx.scale(scale.val*fade_scale.val, scale.val*fade_scale.val);
+        ctx.translate(cos(direction)*radius, sin(direction)*radius);
+        
+        ctx.push_group();
+        
+        ctx.set_operator(Cairo.Operator.ADD);
+    
+        if (fade.val > 0.0) active_icon.paint_on(ctx, this.alpha.val*this.fade.val);
+        if (fade.val < 1.0) inactive_icon.paint_on(ctx, this.alpha.val*(1.0 - fade.val));
+        
+        if (this.parent.show_hotkeys) {
+            ctx.set_operator(Cairo.Operator.ATOP);
+            ctx.set_source_rgba(0, 0, 0, 0.5);
+            ctx.paint();
+        }
+        
+        ctx.set_operator(Cairo.Operator.OVER);
+        
+        
+        ctx.pop_group_to_source();
+        ctx.paint();
+        
+        if (this.parent.show_hotkeys)
+            this.hotkey.paint_on(ctx, 1.0);
+            
+        ctx.restore();
+    }
+}
+
+}