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authorAlessandro Ghedini <al3xbio@gmail.com>2011-10-19 10:56:04 +0200
committerAlessandro Ghedini <al3xbio@gmail.com>2011-10-19 10:56:04 +0200
commit6451a495637c6e3047a5a56573cffc6e3de9a515 (patch)
tree7c3eb29532e7c4b36a9da13c5890664fb816959b /src/renderers/sliceRenderer.vala
Imported Upstream version 0.2+gitdfdad95upstream/0.2+gitdfdad95
Diffstat (limited to 'src/renderers/sliceRenderer.vala')
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diff --git a/src/renderers/sliceRenderer.vala b/src/renderers/sliceRenderer.vala
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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/>.
+*/
+
+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();
+ }
+}
+
+}