/////////////////////////////////////////////////////////////////////////
// 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 <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)(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);
}
}
}
}