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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/pieRenderer.vala
Imported Upstream version 0.2+gitdfdad95upstream/0.2+gitdfdad95
Diffstat (limited to 'src/renderers/pieRenderer.vala')
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1 files changed, 208 insertions, 0 deletions
diff --git a/src/renderers/pieRenderer.vala b/src/renderers/pieRenderer.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 {
+
+/////////////////////////////////////////////////////////////////////////
+/// This class renders a Pie. In order to accomplish that, it owns a
+/// CenterRenderer and some SliceRenderers.
+/////////////////////////////////////////////////////////////////////////
+
+public class PieRenderer : GLib.Object {
+
+ public int quick_action { get; private set; }
+ public int active_slice { get; private set; }
+ public bool show_hotkeys { get; set; }
+
+ private int size;
+ private Gee.ArrayList<SliceRenderer?> slices;
+ private CenterRenderer center;
+ private bool key_board_control = false;
+
+ public PieRenderer() {
+ this.slices = new Gee.ArrayList<SliceRenderer?>();
+ this.center = new CenterRenderer(this);
+ this.quick_action = -1;
+ this.active_slice = -2;
+ this.size = 0;
+ }
+
+ public void load_pie(Pie pie) {
+ this.slices.clear();
+
+ int count = 0;
+ foreach (var group in pie.action_groups) {
+ foreach (var action in group.actions) {
+ var renderer = new SliceRenderer(this);
+ this.slices.add(renderer);
+ renderer.load(action, slices.size-1);
+
+ if (action.is_quick_action) {
+ this.quick_action = count;
+ }
+
+ ++count;
+ }
+ }
+
+ this.set_highlighted_slice(this.quick_action);
+
+ this.size = (int)fmax(2*Config.global.theme.radius + 2*Config.global.theme.slice_radius*Config.global.theme.max_zoom,
+ 2*Config.global.theme.center_radius);
+
+ // increase size if there are many slices
+ if (slices.size > 0) {
+ this.size = (int)fmax(this.size,
+ (((Config.global.theme.slice_radius + Config.global.theme.slice_gap)/tan(PI/slices.size))
+ + Config.global.theme.slice_radius)*2*Config.global.theme.max_zoom);
+ }
+ }
+
+ public void activate() {
+ if (this.active_slice >= 0 && this.active_slice < this.slices.size)
+ slices[active_slice].activate();
+ this.cancel();
+ }
+
+ public void cancel() {
+ foreach (var slice in this.slices)
+ slice.fade_out();
+
+ center.fade_out();
+ }
+
+ public void select_up() {
+ int bottom = this.slice_count()/4;
+ int top = this.slice_count()*3/4;
+
+ if (this.active_slice == -1 || this.active_slice == bottom)
+ this.set_highlighted_slice(top);
+ else if (this.active_slice > bottom && this.active_slice < top)
+ this.set_highlighted_slice(this.active_slice+1);
+ else if (this.active_slice != top)
+ this.set_highlighted_slice((this.active_slice-1+this.slice_count())%this.slice_count());
+ }
+
+ public void select_down() {
+ int bottom = this.slice_count()/4;
+ int top = this.slice_count()*3/4;
+
+ if (this.active_slice == -1 || this.active_slice == top)
+ this.set_highlighted_slice(bottom);
+ else if (this.active_slice > bottom && this.active_slice < top)
+ this.set_highlighted_slice(this.active_slice-1);
+ else if (this.active_slice != bottom)
+ this.set_highlighted_slice((this.active_slice+1)%this.slice_count());
+ }
+
+ public void select_left() {
+ int left = this.slice_count()/2;
+ int right = 0;
+
+ if (this.active_slice == -1 || this.active_slice == right)
+ this.set_highlighted_slice(left);
+ else if (this.active_slice > left)
+ this.set_highlighted_slice(this.active_slice-1);
+ else if (this.active_slice < left)
+ this.set_highlighted_slice(this.active_slice+1);
+ }
+
+ public void select_right() {
+ int left = this.slice_count()/2;
+ int right = 0;
+
+ if (this.active_slice == -1 || this.active_slice == left)
+ this.set_highlighted_slice(right);
+ else if (this.active_slice > left)
+ this.set_highlighted_slice((this.active_slice+1)%this.slice_count());
+ else if (this.active_slice < left && this.active_slice != right)
+ this.set_highlighted_slice((this.active_slice-1+this.slice_count())%this.slice_count());
+ }
+
+ public int slice_count() {
+ return slices.size;
+ }
+
+ public int get_size() {
+ return size;
+ }
+
+ public void draw(double frame_time, Cairo.Context ctx, int mouse_x, int mouse_y) {
+ double distance = sqrt(mouse_x*mouse_x + mouse_y*mouse_y);
+ double angle = 0.0;
+
+ if (this.key_board_control) {
+ angle = 2.0*PI*this.active_slice/(double)slice_count();
+ } else {
+
+ if (distance > 0) {
+ angle = acos(mouse_x/distance);
+ if (mouse_y < 0)
+ angle = 2*PI - angle;
+ }
+
+ int next_active_slice = this.active_slice;
+
+ if (distance < Config.global.theme.active_radius
+ && this.quick_action >= 0 && this.quick_action < this.slices.size) {
+
+ next_active_slice = this.quick_action;
+ angle = 2.0*PI*quick_action/(double)slice_count();
+ } else if (distance > Config.global.theme.active_radius && this.slice_count() > 0) {
+ next_active_slice = (int)(angle*slices.size/(2*PI) + 0.5) % this.slice_count();
+ } else {
+ next_active_slice = -1;
+ }
+
+ this.set_highlighted_slice(next_active_slice);
+ }
+
+ center.draw(frame_time, ctx, angle, distance);
+
+ foreach (var slice in this.slices)
+ slice.draw(frame_time, ctx, angle, distance);
+ }
+
+ public void on_mouse_move() {
+ this.key_board_control = false;
+ }
+
+ public void set_highlighted_slice(int index) {
+ if (index != this.active_slice) {
+ if (index >= 0 && index < this.slice_count())
+ this.active_slice = index;
+ else if (this.quick_action >= 0)
+ this.active_slice = this.quick_action;
+ else
+ this.active_slice = -1;
+
+ SliceRenderer? active = (this.active_slice >= 0 && this.active_slice < this.slice_count()) ?
+ this.slices[this.active_slice] : null;
+
+ center.set_active_slice(active);
+
+ foreach (var slice in this.slices)
+ slice.set_active_slice(active);
+
+ this.key_board_control = true;
+ }
+ }
+}
+
+}