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Diffstat (limited to 'src/renderers/pieRenderer.vala')
| -rw-r--r-- | src/renderers/pieRenderer.vala | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/src/renderers/pieRenderer.vala b/src/renderers/pieRenderer.vala new file mode 100644 index 0000000..5b706f4 --- /dev/null +++ b/src/renderers/pieRenderer.vala @@ -0,0 +1,208 @@ +/* +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; + } + } +} + +} |