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
|
/*******************************************************************************
* Copyright (c) 2006 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.swt.examples.graphics;
import org.eclipse.swt.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;
/**
* This tab demonstrates various line caps applicable to a line.
*/
public class LineCapTab extends GraphicsTab {
Button colorButton;
GraphicsBackground foreground;
Menu menu;
public LineCapTab(GraphicsExample example) {
super(example);
}
@Override
public String getCategory() {
return GraphicsExample.getResourceString("Lines"); //$NON-NLS-1$
}
@Override
public String getText() {
return GraphicsExample.getResourceString("LineCap"); //$NON-NLS-1$
}
@Override
public String getDescription() {
return GraphicsExample.getResourceString("LineCapDescription"); //$NON-NLS-1$
}
@Override
public void dispose() {
if (menu != null) {
menu.dispose();
menu = null;
}
}
@Override
public void createControlPanel(Composite parent) {
Composite comp;
// create color button
comp = new Composite(parent, SWT.NONE);
comp.setLayout(new GridLayout());
ColorMenu cm = new ColorMenu();
cm.setPatternItems(example.checkAdvancedGraphics());
menu = cm.createMenu(parent.getParent(), new ColorListener() {
public void setColor(GraphicsBackground gb) {
foreground = gb;
colorButton.setImage(gb.getThumbNail());
example.redraw();
}
});
// initialize the foreground to the 3rd item in the menu (red)
foreground = (GraphicsBackground)menu.getItem(2).getData();
// color button
colorButton = new Button(comp, SWT.PUSH);
colorButton.setText(GraphicsExample
.getResourceString("Color")); //$NON-NLS-1$
colorButton.setImage(foreground.getThumbNail());
colorButton.addListener(SWT.Selection, new Listener() {
public void handleEvent(Event event) {
final Button button = (Button) event.widget;
final Composite parent = button.getParent();
Rectangle bounds = button.getBounds();
Point point = parent.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) {
Device device = gc.getDevice();
// draw side lines
gc.setLineWidth(1);
gc.setLineStyle(SWT.LINE_DOT);
gc.setForeground(device.getSystemColor(SWT.COLOR_BLACK));
gc.drawLine(3*width/16, height/6, 3*width/16, 5*height/6);
gc.drawLine(13*width/16, height/6, 13*width/16, 5*height/6);
gc.setLineStyle(SWT.LINE_SOLID);
// draw labels
Font font = new Font(device, getPlatformFont(), 20, SWT.NORMAL);
gc.setFont(font);
String text = GraphicsExample.getResourceString("Flat"); //$NON-NLS-1$
Point size = gc.stringExtent(text);
gc.drawString(text, (width-size.x)/2, 3*height/12, true);
text = GraphicsExample.getResourceString("Square"); //$NON-NLS-1$
size = gc.stringExtent(text);
gc.drawString(text, (width-size.x)/2, 5*height/12, true);
text = GraphicsExample.getResourceString("Round"); //$NON-NLS-1$
size = gc.stringExtent(text);
gc.drawString(text, (width-size.x)/2, 7*height/12, true);
font.dispose();
Pattern pattern = null;
if (foreground.getBgColor1() != null) {
gc.setForeground(foreground.getBgColor1());
} else if (foreground.getBgImage() != null) {
pattern = new Pattern(device, foreground.getBgImage());
gc.setForegroundPattern(pattern);
}
// draw lines with caps
gc.setLineWidth(20);
gc.setLineCap(SWT.CAP_FLAT);
gc.drawLine(3*width/16, 2*height/6, 13*width/16, 2*height/6);
gc.setLineCap(SWT.CAP_SQUARE);
gc.drawLine(3*width/16, 3*height/6, 13*width/16, 3*height/6);
gc.setLineCap(SWT.CAP_ROUND);
gc.drawLine(3*width/16, 4*height/6, 13*width/16, 4*height/6);
if (pattern != null) pattern.dispose();
}
/**
* Returns the name of a valid font for the resident platform.
*/
static String getPlatformFont() {
if(SWT.getPlatform() == "win32") {
return "Arial";
} else if (SWT.getPlatform() == "gtk") {
return "Baekmuk Batang";
} else {
return "Verdana";
}
}
}
|
