litesoft
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
|
package org.litesoft.GWT.client.widgets.nonpublic;
import org.litesoft.GWT.client.widgets.nonpublic.external.*;
public abstract class AbstractDragger implements DragGesture
{
private XY mMouseStartDrag;
private boolean mCancelled;
public void start( MouseEvent e )
{
mCancelled = false;
mMouseStartDrag = new XY( e.getWidgetX(), e.getWidgetY() );
// StatusBar.set( "dragStart" + mMouseStartDrag );
// matg: disabled due to poor performance w/ complex windows
// mTarget.addStyleName( "Dragging" );
}
public void step( DragEvent e )
{
if ( !mCancelled )
{
XY xy = new XY( e.getWidgetX(), e.getWidgetY() );
XY delta = xy.minus( mMouseStartDrag );
// StatusBar.set( "MouseMove" + xy + "-" + mMouseStartDrag + "=" + delta );
if ( !dragBy( delta.getX(), delta.getY() ) )
{
finish();
mCancelled = true;
}
}
}
public void finish()
{
// StatusBar.set( "dragStop" );
if ( !mCancelled )
{
mMouseStartDrag = null;
// matg: disabled due to poor performance w/ complex windows
// mTarget.removeStyleName( "Dragging" );
}
}
/**
* @return false to prevent additional dragging
*/
protected abstract boolean dragBy( int pDeltaX, int pDeltaY );
private static class XY
{
private int mX, mY;
public XY( int pX, int pY )
{
mX = pX;
mY = pY;
}
public int getX()
{
return mX;
}
public int getY()
{
return mY;
}
public String toString()
{
return "(" + mX + ", " + mY + ")";
}
public XY add( XY them )
{
return new XY( this.mX + them.mX, this.mY + them.mY );
}
public XY minus( XY them )
{
return new XY( this.mX - them.mX, this.mY - them.mY );
}
public XY addX( int pX )
{
return new XY( this.mX + pX, this.mY );
}
public XY minusX( int pX )
{
return new XY( this.mX - pX, this.mY );
}
public XY addY( int pY )
{
return new XY( this.mX, this.mY + pY );
}
public XY minusY( int pY )
{
return new XY( this.mX, this.mY - pY );
}
}
}
|
Revision |
Author |
Commited |
Message |
2
|
GeorgeS
|
Sun 07 Feb, 2010 12:50:58 +0000 |
|