1*34dd1e25SAndrew Rist /************************************************************** 2*34dd1e25SAndrew Rist * 3*34dd1e25SAndrew Rist * Licensed to the Apache Software Foundation (ASF) under one 4*34dd1e25SAndrew Rist * or more contributor license agreements. See the NOTICE file 5*34dd1e25SAndrew Rist * distributed with this work for additional information 6*34dd1e25SAndrew Rist * regarding copyright ownership. The ASF licenses this file 7*34dd1e25SAndrew Rist * to you under the Apache License, Version 2.0 (the 8*34dd1e25SAndrew Rist * "License"); you may not use this file except in compliance 9*34dd1e25SAndrew Rist * with the License. You may obtain a copy of the License at 10*34dd1e25SAndrew Rist * 11*34dd1e25SAndrew Rist * http://www.apache.org/licenses/LICENSE-2.0 12*34dd1e25SAndrew Rist * 13*34dd1e25SAndrew Rist * Unless required by applicable law or agreed to in writing, 14*34dd1e25SAndrew Rist * software distributed under the License is distributed on an 15*34dd1e25SAndrew Rist * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 16*34dd1e25SAndrew Rist * KIND, either express or implied. See the License for the 17*34dd1e25SAndrew Rist * specific language governing permissions and limitations 18*34dd1e25SAndrew Rist * under the License. 19*34dd1e25SAndrew Rist * 20*34dd1e25SAndrew Rist *************************************************************/ 21*34dd1e25SAndrew Rist 22*34dd1e25SAndrew Rist 23cdf0e10cSrcweir 24cdf0e10cSrcweir // __________ Imports __________ 25cdf0e10cSrcweir 26cdf0e10cSrcweir import java.awt.*; 27cdf0e10cSrcweir import java.lang.*; 28cdf0e10cSrcweir import java.awt.event.*; 29cdf0e10cSrcweir 30cdf0e10cSrcweir // __________ Implementation __________ 31cdf0e10cSrcweir 32cdf0e10cSrcweir /** 33cdf0e10cSrcweir * Class to pass the system window handle to the OpenOffice.org toolkit. 34cdf0e10cSrcweir * It use special JNI methods to get the system handle of used java window. 35cdf0e10cSrcweir * 36cdf0e10cSrcweir * Attention! 37cdf0e10cSrcweir * Use JNI functions on already visible canvas objects only! 38cdf0e10cSrcweir * Otherwise they can make some trouble. 39cdf0e10cSrcweir * 40cdf0e10cSrcweir * @author Andreas Schlüns 41cdf0e10cSrcweir * @created 22.02.2002 08:47 42cdf0e10cSrcweir */ 43cdf0e10cSrcweir 44cdf0e10cSrcweir public class NativeView extends java.awt.Canvas 45cdf0e10cSrcweir { 46cdf0e10cSrcweir // ____________________ 47cdf0e10cSrcweir 48cdf0e10cSrcweir /** 49cdf0e10cSrcweir * ctor 50cdf0e10cSrcweir * Does nothing realy. 51cdf0e10cSrcweir * We can use our JNI mechanism for an already visible 52cdf0e10cSrcweir * canvas only. So we overload the method for showing ("setVisible()") 53cdf0e10cSrcweir * and make our intialization there. BUt we try to show an empty clean 54cdf0e10cSrcweir * window till there. 55cdf0e10cSrcweir */ NativeView()56cdf0e10cSrcweir public NativeView() 57cdf0e10cSrcweir { 58cdf0e10cSrcweir maHandle = null; 59cdf0e10cSrcweir maSystem = 0; 60cdf0e10cSrcweir this.setBackground(Color.white); 61cdf0e10cSrcweir } 62cdf0e10cSrcweir 63cdf0e10cSrcweir // ____________________ 64cdf0e10cSrcweir 65cdf0e10cSrcweir /** 66cdf0e10cSrcweir * Overload this method to make neccessary initializations here. 67cdf0e10cSrcweir * (e.g. get the window handle and neccessary system informations) 68cdf0e10cSrcweir * 69cdf0e10cSrcweir * Why here? 70cdf0e10cSrcweir * Because the handle seams to be available for already visible windows 71cdf0e10cSrcweir * only. So it's the best place to get it. Special helper method 72cdf0e10cSrcweir * can be called more then ones - but call native code one times only 73cdf0e10cSrcweir * and safe the handle and the system type on our members maHandle/maSystem! 74cdf0e10cSrcweir */ setVisible(boolean bState)75cdf0e10cSrcweir public void setVisible(boolean bState) 76cdf0e10cSrcweir { 77cdf0e10cSrcweir getHWND(); 78cdf0e10cSrcweir } 79cdf0e10cSrcweir 80cdf0e10cSrcweir // ____________________ 81cdf0e10cSrcweir 82cdf0e10cSrcweir /** 83cdf0e10cSrcweir * to guarantee right resize handling inside a swing container 84cdf0e10cSrcweir * (e.g. JSplitPane) we must provide some informations about our 85cdf0e10cSrcweir * prefered/minimum and maximum size. 86cdf0e10cSrcweir */ getPreferredSize()87cdf0e10cSrcweir public Dimension getPreferredSize() 88cdf0e10cSrcweir { 89cdf0e10cSrcweir return new Dimension(500,300); 90cdf0e10cSrcweir } 91cdf0e10cSrcweir getMaximumSize()92cdf0e10cSrcweir public Dimension getMaximumSize() 93cdf0e10cSrcweir { 94cdf0e10cSrcweir return new Dimension(1024,768); 95cdf0e10cSrcweir } 96cdf0e10cSrcweir getMinimumSize()97cdf0e10cSrcweir public Dimension getMinimumSize() 98cdf0e10cSrcweir { 99cdf0e10cSrcweir return new Dimension(100,100); 100cdf0e10cSrcweir } 101cdf0e10cSrcweir 102cdf0e10cSrcweir // ____________________ 103cdf0e10cSrcweir 104cdf0e10cSrcweir /** 105cdf0e10cSrcweir * overload paint routine to show provide against 106cdf0e10cSrcweir * repaint errors if no office view is realy plugged 107cdf0e10cSrcweir * into this canvas. 108cdf0e10cSrcweir * If handle is present - we shouldn't paint anything further. 109cdf0e10cSrcweir * May the remote window is already plugged. In such case we 110cdf0e10cSrcweir * shouldn't paint it over. 111cdf0e10cSrcweir */ paint(Graphics aGraphic)112cdf0e10cSrcweir public void paint(Graphics aGraphic) 113cdf0e10cSrcweir { 114cdf0e10cSrcweir if(maHandle==null) 115cdf0e10cSrcweir { 116cdf0e10cSrcweir Dimension aSize = getSize(); 117cdf0e10cSrcweir aGraphic.clearRect(0,0,aSize.width,aSize.height); 118cdf0e10cSrcweir } 119cdf0e10cSrcweir } 120cdf0e10cSrcweir 121cdf0e10cSrcweir // ____________________ 122cdf0e10cSrcweir 123cdf0e10cSrcweir /** 124cdf0e10cSrcweir * JNI interface of this class 125cdf0e10cSrcweir * These two methods are implemented by using JNI mechanismen. 126cdf0e10cSrcweir * The will be used to get the platform dependent window handle 127cdf0e10cSrcweir * of a java awt canvas. This handle can be used to create an office 128cdf0e10cSrcweir * window as direct child of it. So it's possible to plug Office 129cdf0e10cSrcweir * windows in a java UI container. 130cdf0e10cSrcweir * 131cdf0e10cSrcweir * Note: 132cdf0e10cSrcweir * Native code for windows register special function pointer to handle 133cdf0e10cSrcweir * window messages ... But if it doesn't check for an already registered 134cdf0e10cSrcweir * instance of this handler it will do it twice and produce a stack overflow 135cdf0e10cSrcweir * because such method call herself in a never ending loop ... 136cdf0e10cSrcweir * So we try to use the JNI code one times only and safe already getted 137cdf0e10cSrcweir * informations inside this class. 138cdf0e10cSrcweir */ getNativeWindowSystemType()139cdf0e10cSrcweir public native int getNativeWindowSystemType(); getNativeWindow()140cdf0e10cSrcweir private native long getNativeWindow(); // private! => use getHWND() with cache mechanism! 141cdf0e10cSrcweir getHWND()142cdf0e10cSrcweir public Integer getHWND() 143cdf0e10cSrcweir { 144cdf0e10cSrcweir if(maHandle==null) 145cdf0e10cSrcweir { 146cdf0e10cSrcweir maHandle = new Integer((int)getNativeWindow()); 147cdf0e10cSrcweir maSystem = getNativeWindowSystemType(); 148cdf0e10cSrcweir } 149cdf0e10cSrcweir return maHandle; 150cdf0e10cSrcweir } 151cdf0e10cSrcweir 152cdf0e10cSrcweir // ____________________ 153cdf0e10cSrcweir 154cdf0e10cSrcweir /** 155cdf0e10cSrcweir * for using of the JNI methods it's neccessary to load 156cdf0e10cSrcweir * system library which exports it. 157cdf0e10cSrcweir */ 158cdf0e10cSrcweir static 159cdf0e10cSrcweir { 160cdf0e10cSrcweir System.loadLibrary("nativeview"); 161cdf0e10cSrcweir } 162cdf0e10cSrcweir 163cdf0e10cSrcweir // ____________________ 164cdf0e10cSrcweir 165cdf0e10cSrcweir /** 166cdf0e10cSrcweir * @member maHandle system window handle 167cdf0e10cSrcweir * @member maSystem info about currently used platform 168cdf0e10cSrcweir */ 169cdf0e10cSrcweir public Integer maHandle ; 170cdf0e10cSrcweir public int maSystem ; 171cdf0e10cSrcweir } 172