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
|
/**
* AbstractCheckBoxCellPaintListener.java
* Created on Aug 21, 2011
*
* Copyright (c) 2011 Wind River Systems, Inc.
*
* The right to copy, distribute, modify, or otherwise make use
* of this software may be licensed only pursuant to the terms
* of an applicable Wind River license agreement.
*/
package org.eclipse.tm.te.ui.swt.listener;
import org.eclipse.core.runtime.Assert;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Item;
import org.eclipse.swt.widgets.Widget;
import org.eclipse.tm.te.ui.swt.SWTControlUtil;
/**
* Abstract check box cell paint listener implementation.
*/
public abstract class AbstractCheckBoxCellPaintListener extends AbstractCellPaintListener {
private static final int ENABLED = 1;
private static final int CHECKED = 2;
private static final int TRISTATE = 4;
protected static final int STATE_NONE = -1;
protected static final int STATE_ENABLED_CHECKED = ENABLED | CHECKED;
protected static final int STATE_ENABLED_UNCHECKED = ENABLED;
protected static final int STATE_ENABLED_TRISTATE = ENABLED | TRISTATE;
protected static final int STATE_DISABLED_CHECKED = CHECKED;
protected static final int STATE_DISABLED_UNCHECKED = 0;
protected static final int STATE_DISABLED_TRISTATE = TRISTATE;
/**
* Constructor.
*
* @param columns The valid columns.
* @param widget The widget.
*/
public AbstractCheckBoxCellPaintListener(Widget widget, int... columns) {
super(widget, columns);
}
/* (non-Javadoc)
* @see org.eclipse.tm.te.ui.swt.listener.AbstractCellPaintListener#getPaintOrigin(org.eclipse.swt.widgets.Event, org.eclipse.swt.graphics.Image)
*/
@Override
protected Point getPaintOrigin(Event event, Image image) {
// Determine host platform
boolean isWindowsHost = System.getProperty("os.name","").toLowerCase().startsWith("windows"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
// Center the image horizontally within the column
int x = event.x + (getWidgetWidth(event)/2 - image.getImageData().width / 2);
// Center the image vertically within the column
int y = isWindowsHost ? event.y : event.y + event.height - (image.getImageData().height + 4);
return new Point(x, y);
}
/* (non-Javadoc)
* @see org.eclipse.tm.te.ui.swt.listener.AbstractCellPaintListener#getImageToDraw(org.eclipse.swt.widgets.Item, int)
*/
@Override
protected Image getImageToDraw(Item item, int columnIndex) {
Assert.isNotNull(item);
// If the image shall be painted to the current column
if (isPaintImageInColumn(columnIndex)) {
// Check which image to paint
int state = getCheckBoxState(item.getData(), columnIndex);
if (state >= 0) {
return SWTControlUtil.getCheckBoxImage((state & CHECKED) > 0, (state & TRISTATE) > 0, (state & ENABLED) > 0);
}
}
return null;
}
/**
* Returns the state for the check box.
*
* @param data The associated event data or <code>null</code>:
* @param columnIndex The column index of the current column.
*
* @return The state for the check box.
*/
protected abstract int getCheckBoxState(Object data, int columnIndex);
}
|
