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Diffstat (limited to 'src/gui/piePreviewSliceRenderer.vala')
| -rw-r--r-- | src/gui/piePreviewSliceRenderer.vala | 276 |
1 files changed, 276 insertions, 0 deletions
diff --git a/src/gui/piePreviewSliceRenderer.vala b/src/gui/piePreviewSliceRenderer.vala new file mode 100644 index 0000000..af39c1f --- /dev/null +++ b/src/gui/piePreviewSliceRenderer.vala @@ -0,0 +1,276 @@ +/* +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 { + +///////////////////////////////////////////////////////////////////////// +/// Displays the preview of a Slice. +///////////////////////////////////////////////////////////////////////// + +public class PiePreviewSliceRenderer : GLib.Object { + + ///////////////////////////////////////////////////////////////////// + /// Called when the user clicked on this Slice. + ///////////////////////////////////////////////////////////////////// + + public signal void on_clicked(int position); + + ///////////////////////////////////////////////////////////////////// + /// Called when the user clicked on the delete sign. + ///////////////////////////////////////////////////////////////////// + + public signal void on_remove(int position); + + ///////////////////////////////////////////////////////////////////// + /// The image used to display this oject. + ///////////////////////////////////////////////////////////////////// + + public Icon icon { get; private set; } + public ActionGroup action_group { get; private set; } + public string name { get; private set; default=""; } + public bool delete_hovered { get; private set; default=false; } + + ///////////////////////////////////////////////////////////////////// + /// The parent renderer. + ///////////////////////////////////////////////////////////////////// + + private unowned PiePreviewRenderer parent; + + ///////////////////////////////////////////////////////////////////// + /// The delete sign, displayed in the upper right corner of each + /// Slice. + ///////////////////////////////////////////////////////////////////// + + private PiePreviewDeleteSign delete_sign = null; + + ///////////////////////////////////////////////////////////////////// + /// Some AnimatedValues for smooth transitions. + ///////////////////////////////////////////////////////////////////// + + private AnimatedValue angle; + private AnimatedValue size; + private AnimatedValue activity; + private AnimatedValue clicked; + + ///////////////////////////////////////////////////////////////////// + /// Some constants determining the look and behaviour of this Slice. + ///////////////////////////////////////////////////////////////////// + + private const double pie_radius = 126; + private const double radius = 24; + private const double delete_x = 13; + private const double delete_y = -13; + private const double click_cancel_treshold = 5; + + ///////////////////////////////////////////////////////////////////// + /// Storing the position where a mouse click was executed. Useful for + /// canceling the click when the mouse moves some pixels. + ///////////////////////////////////////////////////////////////////// + + private double clicked_x = 0.0; + private double clicked_y = 0.0; + + ///////////////////////////////////////////////////////////////////// + /// The index of this slice in a pie. Clockwise assigned, starting + /// from the right-most slice. + ///////////////////////////////////////////////////////////////////// + + private int position; + + ///////////////////////////////////////////////////////////////////// + /// C'tor, sets everything up. + ///////////////////////////////////////////////////////////////////// + + public PiePreviewSliceRenderer(PiePreviewRenderer parent) { + this.delete_sign = new PiePreviewDeleteSign(); + this.delete_sign.load(); + this.delete_sign.on_clicked.connect(() => { + this.on_remove(this.position); + }); + + this.parent = parent; + this.angle = new AnimatedValue.cubic(AnimatedValue.Direction.OUT, 0, 0, 0, 0.5); + this.size = new AnimatedValue.cubic(AnimatedValue.Direction.OUT, 0, 0, 0, 1.0); + this.activity = new AnimatedValue.cubic(AnimatedValue.Direction.OUT, 0, 0, 0, 0.0); + this.clicked = new AnimatedValue.cubic(AnimatedValue.Direction.OUT, 1, 1, 0, 1.0); + } + + ///////////////////////////////////////////////////////////////////// + /// Loads an Action. All members are initialized accordingly. + ///////////////////////////////////////////////////////////////////// + + public void load(ActionGroup group) { + this.action_group = group; + + // if it's a custom ActionGroup + if (group.get_type().depth() == 2 && group.actions.size > 0) { + this.icon = new Icon(group.actions[0].icon, (int)(radius*2)); + this.name = group.actions[0].name; + } else { + this.icon = new Icon(GroupRegistry.descriptions[group.get_type().name()].icon, (int)(radius*2)); + this.name = GroupRegistry.descriptions[group.get_type().name()].name; + } + } + + ///////////////////////////////////////////////////////////////////// + /// Updates the position where this object should be displayed. + ///////////////////////////////////////////////////////////////////// + + public void set_position(int position, bool smoothly = true) { + double direction = 2.0 * PI * position/parent.slice_count(); + + if (direction != this.angle.end) { + this.position = position; + this.angle.reset_target(direction, smoothly ? 0.5 : 0.0); + + if (!smoothly) + this.angle.update(1.0); + } + } + + ///////////////////////////////////////////////////////////////////// + /// Updates the size of this object. All transitions will be smooth. + ///////////////////////////////////////////////////////////////////// + + public void set_size(double size) { + this.size.reset_target(size, 0.5); + this.delete_sign.set_size(size); + } + + ///////////////////////////////////////////////////////////////////// + /// Notifies that all quick actions should be disabled. + ///////////////////////////////////////////////////////////////////// + + public void disable_quickactions() { + this.action_group.disable_quickactions(); + } + + ///////////////////////////////////////////////////////////////////// + /// Draws the slice to the given context. + ///////////////////////////////////////////////////////////////////// + + public void draw(double frame_time, Cairo.Context ctx) { + this.size.update(frame_time); + this.angle.update(frame_time); + this.activity.update(frame_time); + this.clicked.update(frame_time); + + ctx.save(); + + // transform the context + ctx.translate(cos(this.angle.val)*pie_radius, sin(this.angle.val)*pie_radius); + + double scale = this.size.val*this.clicked.val + + this.activity.val*0.1 - 0.1; + ctx.save(); + + ctx.scale(scale, scale); + + // paint the image + icon.paint_on(ctx); + + ctx.restore(); + + ctx.translate(delete_x*this.size.val, delete_y*this.size.val); + this.delete_sign.draw(frame_time, ctx); + + ctx.restore(); + } + + ///////////////////////////////////////////////////////////////////// + /// Called when the mouse moves to another position. + ///////////////////////////////////////////////////////////////////// + + public bool on_mouse_move(double angle, double x, double y) { + double direction = 2.0 * PI * position/parent.slice_count(); + double diff = fabs(angle-direction); + + if (diff > PI) + diff = 2 * PI - diff; + + bool active = diff < 0.5*PI/parent.slice_count(); + + if (active) { + this.activity.reset_target(1.0, 0.3); + this.delete_sign.show(); + } else { + this.activity.reset_target(0.0, 0.3); + this.delete_sign.hide(); + } + + if (this.clicked.end == 0.9) { + double dist = GLib.Math.pow(x-this.clicked_x, 2) + GLib.Math.pow(y-this.clicked_y, 2); + if (dist > this.click_cancel_treshold*this.click_cancel_treshold) + this.clicked.reset_target(1.0, 0.1); + } + + double own_x = cos(this.angle.val)*pie_radius; + double own_y = sin(this.angle.val)*pie_radius; + this.delete_hovered = this.delete_sign.on_mouse_move(x - own_x - delete_x*this.size.val, + y - own_y - delete_y*this.size.val); + + return active; + } + + ///////////////////////////////////////////////////////////////////// + /// Called when the mouse leaves the area of this widget. + ///////////////////////////////////////////////////////////////////// + + public void on_mouse_leave() { + this.activity.reset_target(0.0, 0.3); + this.delete_sign.hide(); + } + + ///////////////////////////////////////////////////////////////////// + /// Called when a button of the mouse is pressed. + ///////////////////////////////////////////////////////////////////// + + public void on_button_press(double x, double y) { + bool delete_pressed = false; + if (this.activity.end == 1.0) { + double own_x = cos(this.angle.val)*pie_radius; + double own_y = sin(this.angle.val)*pie_radius; + delete_pressed = this.delete_sign.on_button_press(x - own_x - delete_x*this.size.val, + y - own_y - delete_y*this.size.val); + } + + if (!delete_pressed && this.activity.end == 1.0) { + this.clicked.reset_target(0.9, 0.1); + this.clicked_x = x; + this.clicked_y = y; + } + } + + ///////////////////////////////////////////////////////////////////// + /// Called when a button of the mouse is released. + ///////////////////////////////////////////////////////////////////// + + public void on_button_release(double x, double y) { + bool deleted = false; + if (this.activity.end == 1.0) + deleted = this.delete_sign.on_button_release(x, y); + + if (!deleted && this.clicked.end == 0.9) { + this.clicked.reset_target(1.0, 0.1); + this.on_clicked(this.position); + } + } +} + +} |