///////////////////////////////////////////////////////////////////////// // Copyright (c) 2011-2017 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 . ///////////////////////////////////////////////////////////////////////// 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)(PiePreviewSliceRenderer.radius*2)); this.name = group.actions[0].name; } else { this.icon = new Icon(GroupRegistry.descriptions[group.get_type().name()].icon, (int)(PiePreviewSliceRenderer.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)*PiePreviewSliceRenderer.pie_radius, sin(this.angle.val)*PiePreviewSliceRenderer.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(PiePreviewSliceRenderer.delete_x*this.size.val, PiePreviewSliceRenderer.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 > PiePreviewSliceRenderer.click_cancel_treshold*PiePreviewSliceRenderer.click_cancel_treshold) this.clicked.reset_target(1.0, 0.1); } double own_x = cos(this.angle.val)*PiePreviewSliceRenderer.pie_radius; double own_y = sin(this.angle.val)*PiePreviewSliceRenderer.pie_radius; this.delete_hovered = this.delete_sign.on_mouse_move(x - own_x - PiePreviewSliceRenderer.delete_x*this.size.val, y - own_y - PiePreviewSliceRenderer.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)*PiePreviewSliceRenderer.pie_radius; double own_y = sin(this.angle.val)*PiePreviewSliceRenderer.pie_radius; delete_pressed = this.delete_sign.on_button_press(x - own_x - PiePreviewSliceRenderer.delete_x*this.size.val, y - own_y - PiePreviewSliceRenderer.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); } } } }