blob: e88e2a0ad886460db6b8a63f75a5abd464a78812 (
plain)
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
|
/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2000, 2010 Oracle and/or its affiliates.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 License.
*
*************************************************************************/
package embeddedobj.test;
// __________ Imports __________
import java.awt.*;
import java.lang.*;
import java.awt.event.*;
// __________ Implementation __________
/**
* Class to pass the system window handle to the OpenOffice.org toolkit.
* It use special JNI methods to get the system handle of used java window.
*
* Attention!
* Use JNI functions on already visible canvas objects only!
* Otherwise they can make some trouble.
*
* @author Andreas Schlüns
* @created 22.02.2002 08:47
*/
public class NativeView extends java.awt.Canvas
{
// ____________________
/**
* ctor
* Does nothing realy.
* We can use our JNI mechanism for an already visible
* canvas only. So we overload the method for showing ( "setVisible()" )
* and make our intialization there. BUt we try to show an empty clean
* window till there.
*/
public NativeView()
{
maHandle = null;
maSystem = 0;
this.setBackground( Color.white );
}
// ____________________
/**
* Overload this method to make neccessary initializations here.
* ( e.g. get the window handle and neccessary system informations )
*
* Why here?
* Because the handle seams to be available for already visible windows
* only. So it's the best place to get it. Special helper method
* can be called more then ones - but call native code one times only
* and safe the handle and the system type on our members maHandle/maSystem!
*/
public void setVisible( boolean bState )
{
getHWND();
}
// ____________________
/**
* to guarantee right resize handling inside a swing container
* ( e.g. JSplitPane ) we must provide some informations about our
* prefered/minimum and maximum size.
*/
public Dimension getPreferredSize()
{
return new Dimension( 800, 600 );
}
public Dimension getMaximumSize()
{
return new Dimension( 1024, 768 );
}
public Dimension getMinimumSize()
{
return new Dimension( 300, 300 );
}
// ____________________
/**
* overload paint routine to show provide against
* repaint errors if no office view is realy plugged
* into this canvas.
* If handle is present - we shouldn't paint anything further.
* May the remote window is already plugged. In such case we
* shouldn't paint it over.
*/
public void paint( Graphics aGraphic )
{
if( maHandle == null )
{
Dimension aSize = getSize();
aGraphic.clearRect( 0, 0, aSize.width, aSize.height );
}
}
// ____________________
/**
* JNI interface of this class
* These two methods are implemented by using JNI mechanismen.
* The will be used to get the platform dependent window handle
* of a java awt canvas. This handle can be used to create an office
* window as direct child of it. So it's possible to plug Office
* windows in a java UI container.
*
* Note:
* Native code for windows register special function pointer to handle
* window messages ... But if it doesn't check for an already registered
* instance of this handler it will do it twice and produce a stack overflow
* because such method call herself in a never ending loop ...
* So we try to use the JNI code one times only and safe already getted
* informations inside this class.
*/
public native int getNativeWindowSystemType();
private native long getNativeWindow(); // private! => use getHWND() with cache mechanism!
public Integer getHWND()
{
if( maHandle == null )
{
maHandle = new Integer( (int )getNativeWindow() );
maSystem = getNativeWindowSystemType();
}
return maHandle;
}
// ____________________
/**
* for using of the JNI methods it's neccessary to load
* system library which exports it.
*/
static
{
System.loadLibrary( "nativeview" );
}
// ____________________
/**
* @member maHandle system window handle
* @member maSystem info about currently used platform
*/
public Integer maHandle ;
public int maSystem ;
}
|
