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
|
/*******************************************************************************
* 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.SWT;
import org.eclipse.swt.graphics.Device;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Path;
import org.eclipse.swt.graphics.Pattern;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Combo;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Menu;
/**
* This tab demonstrates various line joins. It allows a user to choose from
* bevel, miter and round.
*/
public class LineJoinTab extends GraphicsTab {
private Combo joinCb;
private Button colorButton;
private GraphicsBackground shapeColor;
private Menu menu;
private int [] joinValues = new int [] {SWT.JOIN_BEVEL, SWT.JOIN_MITER, SWT.JOIN_ROUND};
public LineJoinTab(GraphicsExample example) {
super(example);
}
@Override
public String getCategory() {
return GraphicsExample.getResourceString("Lines"); //$NON-NLS-1$
}
@Override
public String getText() {
return GraphicsExample.getResourceString("LineJoin"); //$NON-NLS-1$
}
@Override
public String getDescription() {
return GraphicsExample.getResourceString("LineJoinDescription"); //$NON-NLS-1$
}
@Override
public void dispose() {
if (menu != null) {
menu.dispose();
menu = null;
}
}
@Override
public void createControlPanel(Composite parent) {
// create drop down combo for choosing clipping
Composite comp = new Composite(parent, SWT.NONE);
comp.setLayout(new GridLayout(2, false));
new Label(comp, SWT.CENTER).setText(GraphicsExample
.getResourceString("LineJoin")); //$NON-NLS-1$
joinCb = new Combo(comp, SWT.DROP_DOWN);
joinCb.add(GraphicsExample
.getResourceString("bevel")); //$NON-NLS-1$
joinCb.add(GraphicsExample
.getResourceString("miter")); //$NON-NLS-1$
joinCb.add(GraphicsExample
.getResourceString("round")); //$NON-NLS-1$
joinCb.select(1);
joinCb.addListener(SWT.Selection, event -> example.redraw());
// color menu
ColorMenu cm = new ColorMenu();
cm.setPatternItems(example.checkAdvancedGraphics());
menu = cm.createMenu(parent.getParent(), gb -> {
shapeColor = gb;
colorButton.setImage(gb.getThumbNail());
example.redraw();
});
// initialize the shape color to the 4th item in the menu (green)
shapeColor =(GraphicsBackground)menu.getItem(3).getData();
// color button
comp = new Composite(parent, SWT.NONE);
comp.setLayout(new GridLayout(2, false));
colorButton = new Button(comp, SWT.PUSH);
colorButton.setText(GraphicsExample
.getResourceString("Color")); //$NON-NLS-1$
colorButton.setImage(shapeColor.getThumbNail());
colorButton.addListener(SWT.Selection, event -> {
final Button button = (Button) event.widget;
final Composite parent1 = button.getParent();
Rectangle bounds = button.getBounds();
Point point = parent1.toDisplay(new Point(bounds.x, bounds.y));
menu.setLocation(point.x, point.y + bounds.height);
menu.setVisible(true);
});
}
@Override
public void paint(GC gc, int width, int height) {
if (!example.checkAdvancedGraphics()) return;
Device device = gc.getDevice();
gc.setLineWidth(20);
gc.setLineJoin(joinValues[joinCb.getSelectionIndex()]);
// set the foreground color or pattern
Pattern pattern = null;
if (shapeColor.getBgColor1() != null) {
gc.setForeground(shapeColor.getBgColor1());
} else if (shapeColor.getBgImage() != null) {
pattern = new Pattern(device, shapeColor.getBgImage());
gc.setForegroundPattern(pattern);
}
// draw the shape
Path path = new Path(device);
path.moveTo(width/2, 25);
path.lineTo(2*width/3, height/3);
path.lineTo(width-25, height/2);
path.lineTo(2*width/3, 2*height/3);
path.lineTo(width/2, height-25);
path.lineTo(width/3, 2*height/3);
path.lineTo(25, height/2);
path.lineTo(width/3, height/3);
path.lineTo(width/2, 25);
path.close();
gc.drawPath(path);
path.dispose();
if (pattern != null) pattern.dispose();
}
}
|
