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
|
/*******************************************************************************
* Copyright (c) 2006, 2016 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.swt.examples.graphics;
import org.eclipse.swt.graphics.Device;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.graphics.Transform;
/**
* This tab demonstrates various transformations, such as scaling, rotation, and
* translation.
*/
public class CardsTab extends AnimatedGraphicsTab {
float movClubX, movClubY, movDiamondX, movDiamondY, movHeart, movSpade;
float inc_club = 5.0f;
float inc_diamond = 5.0f;
float inc_hearts = 5.0f;
float inc_spade = 5.0f;
float scale, scaleWidth;
int rotationAngle = 0;
float scaleArg = 0;
float heartScale = 0.5f;
float spadeScale = 0.333f;
int clubWidth, diamondWidth, heartWidth, spadeHeight;
Image ace_club, ace_spade, ace_diamond, ace_hearts;
/**
* Constructor
* @param example A GraphicsExample
*/
public CardsTab(GraphicsExample example) {
super(example);
}
@Override
public String getCategory() {
return GraphicsExample.getResourceString("Transform"); //$NON-NLS-1$
}
@Override
public String getText() {
return GraphicsExample.getResourceString("Cards"); //$NON-NLS-1$
}
@Override
public String getDescription() {
return GraphicsExample.getResourceString("CardsDescription"); //$NON-NLS-1$
}
@Override
public void dispose() {
if (ace_club != null) {
ace_club.dispose();
ace_club = null;
ace_spade.dispose();
ace_spade = null;
ace_diamond.dispose();
ace_diamond = null;
ace_hearts.dispose();
ace_hearts = null;
}
}
@Override
public void next(int width, int height) {
rotationAngle = (rotationAngle+10)%360;
// scaleVal goes from 0 to 1, then 1 to 0, then starts over
scaleArg = (float)((scaleArg == 1) ? scaleArg - 0.1 : scaleArg + 0.1);
scale = (float)Math.cos(scaleArg);
movClubX += inc_club;
movDiamondX += inc_diamond;
movHeart += inc_hearts;
movSpade += inc_spade;
scaleWidth = (float) ((movClubY/height)*0.35 + 0.15);
movClubY = 2*height/5 * (float)Math.sin(0.01*movClubX - 90) + 2*height/5;
movDiamondY = 2*height/5 * (float)Math.cos(0.01*movDiamondX) + 2*height/5;
if (movClubX + clubWidth*scaleWidth > width) {
movClubX = width - clubWidth*scaleWidth;
inc_club = -inc_club;
}
if (movClubX < 0) {
movClubX = 0;
inc_club = -inc_club;
}
if (movDiamondX + diamondWidth*scaleWidth > width) {
movDiamondX = width - diamondWidth*scaleWidth;
inc_diamond = -inc_diamond;
}
if (movDiamondX < 0) {
movDiamondX = 0;
inc_diamond = -inc_diamond;
}
if (movHeart + heartWidth*heartScale > width) {
movHeart = width - heartWidth*heartScale;
inc_hearts = -inc_hearts;
}
if (movHeart < 0) {
movHeart = 0;
inc_hearts = -inc_hearts;
}
if (movSpade + spadeHeight*spadeScale > height) {
movSpade = height - spadeHeight*spadeScale;
inc_spade = -inc_spade;
}
if (movSpade < 0) {
movSpade = 0;
inc_spade = -inc_spade;
}
}
@Override
public void paint(GC gc, int width, int height) {
if (!example.checkAdvancedGraphics()) return;
Device device = gc.getDevice();
if (ace_club == null) {
ace_club = GraphicsExample.loadImage(device, GraphicsExample.class, "ace_club.jpg");
ace_spade = GraphicsExample.loadImage(device, GraphicsExample.class, "ace_spade.jpg");
ace_diamond = GraphicsExample.loadImage(device, GraphicsExample.class, "ace_diamond.jpg");
ace_hearts = GraphicsExample.loadImage(device, GraphicsExample.class, "ace_hearts.jpg");
}
clubWidth = ace_club.getBounds().width;
diamondWidth = ace_diamond.getBounds().width;
heartWidth = ace_hearts.getBounds().width;
spadeHeight = ace_spade.getBounds().height;
Transform transform;
// ace of clubs
transform = new Transform(device);
transform.translate((int)movClubX, (int)movClubY);
transform.scale(scaleWidth, scaleWidth);
// rotate on center of image
Rectangle rect = ace_club.getBounds();
transform.translate(rect.width/2, rect.height/2);
transform.rotate(rotationAngle);
transform.translate(-rect.width/2, -rect.height/2);
gc.setTransform(transform);
transform.dispose();
gc.drawImage(ace_club, 0, 0);
// ace of diamonds
transform = new Transform(device);
transform.translate((int)movDiamondX, (int)movDiamondY);
transform.scale(scaleWidth, scaleWidth);
gc.setTransform(transform);
transform.dispose();
gc.drawImage(ace_diamond, 0, 0);
// ace of hearts
transform = new Transform(device);
transform.translate(movHeart, height/2);
transform.scale(heartScale, 0.5f*scale);
gc.setTransform(transform);
transform.dispose();
gc.drawImage(ace_hearts, 0, 0);
// ace of spades
transform = new Transform(device);
transform.translate(movSpade, movSpade);
transform.scale(0.5f*scale, spadeScale);
gc.setTransform(transform);
transform.dispose();
gc.drawImage(ace_spade, 0, 0);
}
}
|
