1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
|
/////////////////////////////////////////////////////////////////////////
// Copyright (c) 2011-2015 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 {
/////////////////////////////////////////////////////////////////////////
/// The delete sign, displayed in the upper right corner of each
/// Slice.
/////////////////////////////////////////////////////////////////////////
public class PiePreviewDeleteSign : GLib.Object {
/////////////////////////////////////////////////////////////////////
/// Called when the user clicked on this sign.
/////////////////////////////////////////////////////////////////////
public signal void on_clicked();
/////////////////////////////////////////////////////////////////////
/// The image used to display this oject.
/////////////////////////////////////////////////////////////////////
public Image icon { get; private set; }
/////////////////////////////////////////////////////////////////////
/// Some constants determining the look and behaviour of this Slice.
/////////////////////////////////////////////////////////////////////
private static const int radius = 18;
private static const double globale_scale = 0.8;
private static const double click_cancel_treshold = 5;
/////////////////////////////////////////////////////////////////////
/// True, when the add sign is currently visible.
/////////////////////////////////////////////////////////////////////
private bool visible = false;
/////////////////////////////////////////////////////////////////////
/// Some AnimatedValues for smooth transitions.
/////////////////////////////////////////////////////////////////////
private AnimatedValue size;
private AnimatedValue alpha;
private AnimatedValue activity;
private AnimatedValue clicked;
/////////////////////////////////////////////////////////////////////
/// 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;
/////////////////////////////////////////////////////////////////////
/// C'tor, sets everything up.
/////////////////////////////////////////////////////////////////////
public PiePreviewDeleteSign() {
this.size = new AnimatedValue.cubic(AnimatedValue.Direction.OUT, 0, 0, 0, 2.0);
this.alpha = new AnimatedValue.cubic(AnimatedValue.Direction.OUT, 0, 0, 0, 0.0);
this.activity = new AnimatedValue.cubic(AnimatedValue.Direction.OUT, -3, -3, 0, 0.0);
this.clicked = new AnimatedValue.cubic(AnimatedValue.Direction.OUT, 1, 1, 0, 0.0);
}
/////////////////////////////////////////////////////////////////////
/// Loads an Action. All members are initialized accordingly.
/////////////////////////////////////////////////////////////////////
public void load() {
this.icon = new Icon("edit-delete", PiePreviewDeleteSign.radius*2);
}
/////////////////////////////////////////////////////////////////////
/// Makes this object visible.
/////////////////////////////////////////////////////////////////////
public void show() {
if (!this.visible) {
this.visible = true;
this.alpha.reset_target(1.0, 0.3);
}
}
/////////////////////////////////////////////////////////////////////
/// Makes this object invisible.
/////////////////////////////////////////////////////////////////////
public void hide() {
if (this.visible) {
this.visible = false;
this.alpha.reset_target(0.0, 0.3);
}
}
/////////////////////////////////////////////////////////////////////
/// Updates the size of this object. All transitions will be smooth.
/////////////////////////////////////////////////////////////////////
public void set_size(double size) {
this.size.reset_target(size, 0.2);
}
/////////////////////////////////////////////////////////////////////
/// Draws the sign to the given context.
/////////////////////////////////////////////////////////////////////
public void draw(double frame_time, Cairo.Context ctx) {
this.size.update(frame_time);
this.alpha.update(frame_time);
this.activity.update(frame_time);
this.clicked.update(frame_time);
if (this.alpha.val > 0) {
ctx.save();
// transform the context
double scale = (this.size.val*this.clicked.val
+ this.activity.val*0.2 - 0.2)*PiePreviewDeleteSign.globale_scale;
ctx.scale(scale, scale);
// paint the image
icon.paint_on(ctx, this.alpha.val);
ctx.restore();
}
}
/////////////////////////////////////////////////////////////////////
/// Called when the mouse moves to another position.
/////////////////////////////////////////////////////////////////////
public bool on_mouse_move(double x, double y) {
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 > PiePreviewDeleteSign.click_cancel_treshold*PiePreviewDeleteSign.click_cancel_treshold)
this.clicked.reset_target(1.0, 0.1);
}
if (GLib.Math.fabs(x) <= PiePreviewDeleteSign.radius*PiePreviewDeleteSign.globale_scale && GLib.Math.fabs(y) <= PiePreviewDeleteSign.radius*PiePreviewDeleteSign.globale_scale) {
this.activity.reset_target(1.0, 0.2);
return true;
}
this.activity.reset_target(0.0, 0.2);
return false;
}
/////////////////////////////////////////////////////////////////////
/// Called when a button of the mouse is pressed.
/////////////////////////////////////////////////////////////////////
public bool on_button_press(double x, double y) {
if (this.activity.end == 1.0) {
this.clicked.reset_target(0.9, 0.1);
this.clicked_x = x;
this.clicked_y = y;
return true;
}
return false;
}
/////////////////////////////////////////////////////////////////////
/// Called when a button of the mouse is released.
/////////////////////////////////////////////////////////////////////
public bool on_button_release(double x, double y) {
if (this.clicked.end == 0.9) {
this.clicked.reset_target(1.0, 0.1);
this.on_clicked();
return true;
}
return false;
}
}
}
|
