1*b1cdbd2cSJim Jagielski /************************************************************** 2*b1cdbd2cSJim Jagielski * 3*b1cdbd2cSJim Jagielski * Licensed to the Apache Software Foundation (ASF) under one 4*b1cdbd2cSJim Jagielski * or more contributor license agreements. See the NOTICE file 5*b1cdbd2cSJim Jagielski * distributed with this work for additional information 6*b1cdbd2cSJim Jagielski * regarding copyright ownership. The ASF licenses this file 7*b1cdbd2cSJim Jagielski * to you under the Apache License, Version 2.0 (the 8*b1cdbd2cSJim Jagielski * "License"); you may not use this file except in compliance 9*b1cdbd2cSJim Jagielski * with the License. You may obtain a copy of the License at 10*b1cdbd2cSJim Jagielski * 11*b1cdbd2cSJim Jagielski * http://www.apache.org/licenses/LICENSE-2.0 12*b1cdbd2cSJim Jagielski * 13*b1cdbd2cSJim Jagielski * Unless required by applicable law or agreed to in writing, 14*b1cdbd2cSJim Jagielski * software distributed under the License is distributed on an 15*b1cdbd2cSJim Jagielski * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 16*b1cdbd2cSJim Jagielski * KIND, either express or implied. See the License for the 17*b1cdbd2cSJim Jagielski * specific language governing permissions and limitations 18*b1cdbd2cSJim Jagielski * under the License. 19*b1cdbd2cSJim Jagielski * 20*b1cdbd2cSJim Jagielski *************************************************************/ 21*b1cdbd2cSJim Jagielski 22*b1cdbd2cSJim Jagielski 23*b1cdbd2cSJim Jagielski 24*b1cdbd2cSJim Jagielski // __________ Imports __________ 25*b1cdbd2cSJim Jagielski 26*b1cdbd2cSJim Jagielski import java.awt.*; 27*b1cdbd2cSJim Jagielski import java.lang.*; 28*b1cdbd2cSJim Jagielski import java.awt.event.*; 29*b1cdbd2cSJim Jagielski 30*b1cdbd2cSJim Jagielski // __________ Implementation __________ 31*b1cdbd2cSJim Jagielski 32*b1cdbd2cSJim Jagielski /** 33*b1cdbd2cSJim Jagielski * Class to pass the system window handle to the OpenOffice.org toolkit. 34*b1cdbd2cSJim Jagielski * It use special JNI methods to get the system handle of used java window. 35*b1cdbd2cSJim Jagielski * 36*b1cdbd2cSJim Jagielski * Attention! 37*b1cdbd2cSJim Jagielski * Use JNI functions on already visible canvas objects only! 38*b1cdbd2cSJim Jagielski * Otherwise they can make some trouble. 39*b1cdbd2cSJim Jagielski * 40*b1cdbd2cSJim Jagielski * @author Andreas Schlüns 41*b1cdbd2cSJim Jagielski * @created 22.02.2002 08:47 42*b1cdbd2cSJim Jagielski */ 43*b1cdbd2cSJim Jagielski 44*b1cdbd2cSJim Jagielski public class NativeView extends java.awt.Canvas 45*b1cdbd2cSJim Jagielski { 46*b1cdbd2cSJim Jagielski // ____________________ 47*b1cdbd2cSJim Jagielski 48*b1cdbd2cSJim Jagielski /** 49*b1cdbd2cSJim Jagielski * ctor 50*b1cdbd2cSJim Jagielski * Does nothing realy. 51*b1cdbd2cSJim Jagielski * We can use our JNI mechanism for an already visible 52*b1cdbd2cSJim Jagielski * canvas only. So we overload the method for showing ("setVisible()") 53*b1cdbd2cSJim Jagielski * and make our intialization there. BUt we try to show an empty clean 54*b1cdbd2cSJim Jagielski * window till there. 55*b1cdbd2cSJim Jagielski */ NativeView()56*b1cdbd2cSJim Jagielski public NativeView() 57*b1cdbd2cSJim Jagielski { 58*b1cdbd2cSJim Jagielski maHandle = null; 59*b1cdbd2cSJim Jagielski maSystem = 0; 60*b1cdbd2cSJim Jagielski this.setBackground(Color.white); 61*b1cdbd2cSJim Jagielski } 62*b1cdbd2cSJim Jagielski 63*b1cdbd2cSJim Jagielski // ____________________ 64*b1cdbd2cSJim Jagielski 65*b1cdbd2cSJim Jagielski /** 66*b1cdbd2cSJim Jagielski * Overload this method to make neccessary initializations here. 67*b1cdbd2cSJim Jagielski * (e.g. get the window handle and neccessary system informations) 68*b1cdbd2cSJim Jagielski * 69*b1cdbd2cSJim Jagielski * Why here? 70*b1cdbd2cSJim Jagielski * Because the handle seams to be available for already visible windows 71*b1cdbd2cSJim Jagielski * only. So it's the best place to get it. Special helper method 72*b1cdbd2cSJim Jagielski * can be called more then ones - but call native code one times only 73*b1cdbd2cSJim Jagielski * and safe the handle and the system type on our members maHandle/maSystem! 74*b1cdbd2cSJim Jagielski */ setVisible(boolean bState)75*b1cdbd2cSJim Jagielski public void setVisible(boolean bState) 76*b1cdbd2cSJim Jagielski { 77*b1cdbd2cSJim Jagielski getHWND(); 78*b1cdbd2cSJim Jagielski } 79*b1cdbd2cSJim Jagielski 80*b1cdbd2cSJim Jagielski // ____________________ 81*b1cdbd2cSJim Jagielski 82*b1cdbd2cSJim Jagielski /** 83*b1cdbd2cSJim Jagielski * to guarantee right resize handling inside a swing container 84*b1cdbd2cSJim Jagielski * (e.g. JSplitPane) we must provide some informations about our 85*b1cdbd2cSJim Jagielski * prefered/minimum and maximum size. 86*b1cdbd2cSJim Jagielski */ getPreferredSize()87*b1cdbd2cSJim Jagielski public Dimension getPreferredSize() 88*b1cdbd2cSJim Jagielski { 89*b1cdbd2cSJim Jagielski return new Dimension(500,300); 90*b1cdbd2cSJim Jagielski } 91*b1cdbd2cSJim Jagielski getMaximumSize()92*b1cdbd2cSJim Jagielski public Dimension getMaximumSize() 93*b1cdbd2cSJim Jagielski { 94*b1cdbd2cSJim Jagielski return new Dimension(1024,768); 95*b1cdbd2cSJim Jagielski } 96*b1cdbd2cSJim Jagielski getMinimumSize()97*b1cdbd2cSJim Jagielski public Dimension getMinimumSize() 98*b1cdbd2cSJim Jagielski { 99*b1cdbd2cSJim Jagielski return new Dimension(100,100); 100*b1cdbd2cSJim Jagielski } 101*b1cdbd2cSJim Jagielski 102*b1cdbd2cSJim Jagielski // ____________________ 103*b1cdbd2cSJim Jagielski 104*b1cdbd2cSJim Jagielski /** 105*b1cdbd2cSJim Jagielski * overload paint routine to show provide against 106*b1cdbd2cSJim Jagielski * repaint errors if no office view is realy plugged 107*b1cdbd2cSJim Jagielski * into this canvas. 108*b1cdbd2cSJim Jagielski * If handle is present - we shouldn't paint anything further. 109*b1cdbd2cSJim Jagielski * May the remote window is already plugged. In such case we 110*b1cdbd2cSJim Jagielski * shouldn't paint it over. 111*b1cdbd2cSJim Jagielski */ paint(Graphics aGraphic)112*b1cdbd2cSJim Jagielski public void paint(Graphics aGraphic) 113*b1cdbd2cSJim Jagielski { 114*b1cdbd2cSJim Jagielski if(maHandle==null) 115*b1cdbd2cSJim Jagielski { 116*b1cdbd2cSJim Jagielski Dimension aSize = getSize(); 117*b1cdbd2cSJim Jagielski aGraphic.clearRect(0,0,aSize.width,aSize.height); 118*b1cdbd2cSJim Jagielski } 119*b1cdbd2cSJim Jagielski } 120*b1cdbd2cSJim Jagielski 121*b1cdbd2cSJim Jagielski // ____________________ 122*b1cdbd2cSJim Jagielski 123*b1cdbd2cSJim Jagielski /** 124*b1cdbd2cSJim Jagielski * JNI interface of this class 125*b1cdbd2cSJim Jagielski * These two methods are implemented by using JNI mechanismen. 126*b1cdbd2cSJim Jagielski * The will be used to get the platform dependent window handle 127*b1cdbd2cSJim Jagielski * of a java awt canvas. This handle can be used to create an office 128*b1cdbd2cSJim Jagielski * window as direct child of it. So it's possible to plug Office 129*b1cdbd2cSJim Jagielski * windows in a java UI container. 130*b1cdbd2cSJim Jagielski * 131*b1cdbd2cSJim Jagielski * Note: 132*b1cdbd2cSJim Jagielski * Native code for windows register special function pointer to handle 133*b1cdbd2cSJim Jagielski * window messages ... But if it doesn't check for an already registered 134*b1cdbd2cSJim Jagielski * instance of this handler it will do it twice and produce a stack overflow 135*b1cdbd2cSJim Jagielski * because such method call herself in a never ending loop ... 136*b1cdbd2cSJim Jagielski * So we try to use the JNI code one times only and safe already getted 137*b1cdbd2cSJim Jagielski * informations inside this class. 138*b1cdbd2cSJim Jagielski */ getNativeWindowSystemType()139*b1cdbd2cSJim Jagielski public native int getNativeWindowSystemType(); getNativeWindow()140*b1cdbd2cSJim Jagielski private native long getNativeWindow(); // private! => use getHWND() with cache mechanism! 141*b1cdbd2cSJim Jagielski getHWND()142*b1cdbd2cSJim Jagielski public Integer getHWND() 143*b1cdbd2cSJim Jagielski { 144*b1cdbd2cSJim Jagielski if(maHandle==null) 145*b1cdbd2cSJim Jagielski { 146*b1cdbd2cSJim Jagielski maHandle = new Integer((int)getNativeWindow()); 147*b1cdbd2cSJim Jagielski maSystem = getNativeWindowSystemType(); 148*b1cdbd2cSJim Jagielski } 149*b1cdbd2cSJim Jagielski return maHandle; 150*b1cdbd2cSJim Jagielski } 151*b1cdbd2cSJim Jagielski 152*b1cdbd2cSJim Jagielski // ____________________ 153*b1cdbd2cSJim Jagielski 154*b1cdbd2cSJim Jagielski /** 155*b1cdbd2cSJim Jagielski * for using of the JNI methods it's neccessary to load 156*b1cdbd2cSJim Jagielski * system library which exports it. 157*b1cdbd2cSJim Jagielski */ 158*b1cdbd2cSJim Jagielski static 159*b1cdbd2cSJim Jagielski { 160*b1cdbd2cSJim Jagielski System.loadLibrary("nativeview"); 161*b1cdbd2cSJim Jagielski } 162*b1cdbd2cSJim Jagielski 163*b1cdbd2cSJim Jagielski // ____________________ 164*b1cdbd2cSJim Jagielski 165*b1cdbd2cSJim Jagielski /** 166*b1cdbd2cSJim Jagielski * @member maHandle system window handle 167*b1cdbd2cSJim Jagielski * @member maSystem info about currently used platform 168*b1cdbd2cSJim Jagielski */ 169*b1cdbd2cSJim Jagielski public Integer maHandle ; 170*b1cdbd2cSJim Jagielski public int maSystem ; 171*b1cdbd2cSJim Jagielski } 172