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 package embeddedobj.test; 24*b1cdbd2cSJim Jagielski 25*b1cdbd2cSJim Jagielski // __________ Imports __________ 26*b1cdbd2cSJim Jagielski 27*b1cdbd2cSJim Jagielski import java.awt.*; 28*b1cdbd2cSJim Jagielski import java.lang.*; 29*b1cdbd2cSJim Jagielski import java.awt.event.*; 30*b1cdbd2cSJim Jagielski 31*b1cdbd2cSJim Jagielski // __________ Implementation __________ 32*b1cdbd2cSJim Jagielski 33*b1cdbd2cSJim Jagielski /** 34*b1cdbd2cSJim Jagielski * Class to pass the system window handle to the OpenOffice.org toolkit. 35*b1cdbd2cSJim Jagielski * It use special JNI methods to get the system handle of used java window. 36*b1cdbd2cSJim Jagielski * 37*b1cdbd2cSJim Jagielski * Attention! 38*b1cdbd2cSJim Jagielski * Use JNI functions on already visible canvas objects only! 39*b1cdbd2cSJim Jagielski * Otherwise they can make some trouble. 40*b1cdbd2cSJim Jagielski * 41*b1cdbd2cSJim Jagielski * @author Andreas Schlüns 42*b1cdbd2cSJim Jagielski * @created 22.02.2002 08:47 43*b1cdbd2cSJim Jagielski */ 44*b1cdbd2cSJim Jagielski 45*b1cdbd2cSJim Jagielski public class NativeView extends java.awt.Canvas 46*b1cdbd2cSJim Jagielski { 47*b1cdbd2cSJim Jagielski // ____________________ 48*b1cdbd2cSJim Jagielski 49*b1cdbd2cSJim Jagielski /** 50*b1cdbd2cSJim Jagielski * ctor 51*b1cdbd2cSJim Jagielski * Does nothing realy. 52*b1cdbd2cSJim Jagielski * We can use our JNI mechanism for an already visible 53*b1cdbd2cSJim Jagielski * canvas only. So we overload the method for showing ( "setVisible()" ) 54*b1cdbd2cSJim Jagielski * and make our intialization there. BUt we try to show an empty clean 55*b1cdbd2cSJim Jagielski * window till there. 56*b1cdbd2cSJim Jagielski */ NativeView()57*b1cdbd2cSJim Jagielski public NativeView() 58*b1cdbd2cSJim Jagielski { 59*b1cdbd2cSJim Jagielski maHandle = null; 60*b1cdbd2cSJim Jagielski maSystem = 0; 61*b1cdbd2cSJim Jagielski this.setBackground( Color.white ); 62*b1cdbd2cSJim Jagielski } 63*b1cdbd2cSJim Jagielski 64*b1cdbd2cSJim Jagielski // ____________________ 65*b1cdbd2cSJim Jagielski 66*b1cdbd2cSJim Jagielski /** 67*b1cdbd2cSJim Jagielski * Overload this method to make neccessary initializations here. 68*b1cdbd2cSJim Jagielski * ( e.g. get the window handle and neccessary system informations ) 69*b1cdbd2cSJim Jagielski * 70*b1cdbd2cSJim Jagielski * Why here? 71*b1cdbd2cSJim Jagielski * Because the handle seams to be available for already visible windows 72*b1cdbd2cSJim Jagielski * only. So it's the best place to get it. Special helper method 73*b1cdbd2cSJim Jagielski * can be called more then ones - but call native code one times only 74*b1cdbd2cSJim Jagielski * and safe the handle and the system type on our members maHandle/maSystem! 75*b1cdbd2cSJim Jagielski */ setVisible( boolean bState )76*b1cdbd2cSJim Jagielski public void setVisible( boolean bState ) 77*b1cdbd2cSJim Jagielski { 78*b1cdbd2cSJim Jagielski getHWND(); 79*b1cdbd2cSJim Jagielski } 80*b1cdbd2cSJim Jagielski 81*b1cdbd2cSJim Jagielski // ____________________ 82*b1cdbd2cSJim Jagielski 83*b1cdbd2cSJim Jagielski /** 84*b1cdbd2cSJim Jagielski * to guarantee right resize handling inside a swing container 85*b1cdbd2cSJim Jagielski * ( e.g. JSplitPane ) we must provide some informations about our 86*b1cdbd2cSJim Jagielski * prefered/minimum and maximum size. 87*b1cdbd2cSJim Jagielski */ getPreferredSize()88*b1cdbd2cSJim Jagielski public Dimension getPreferredSize() 89*b1cdbd2cSJim Jagielski { 90*b1cdbd2cSJim Jagielski return new Dimension( 800, 600 ); 91*b1cdbd2cSJim Jagielski } 92*b1cdbd2cSJim Jagielski getMaximumSize()93*b1cdbd2cSJim Jagielski public Dimension getMaximumSize() 94*b1cdbd2cSJim Jagielski { 95*b1cdbd2cSJim Jagielski return new Dimension( 1024, 768 ); 96*b1cdbd2cSJim Jagielski } 97*b1cdbd2cSJim Jagielski getMinimumSize()98*b1cdbd2cSJim Jagielski public Dimension getMinimumSize() 99*b1cdbd2cSJim Jagielski { 100*b1cdbd2cSJim Jagielski return new Dimension( 300, 300 ); 101*b1cdbd2cSJim Jagielski } 102*b1cdbd2cSJim Jagielski 103*b1cdbd2cSJim Jagielski // ____________________ 104*b1cdbd2cSJim Jagielski 105*b1cdbd2cSJim Jagielski /** 106*b1cdbd2cSJim Jagielski * overload paint routine to show provide against 107*b1cdbd2cSJim Jagielski * repaint errors if no office view is realy plugged 108*b1cdbd2cSJim Jagielski * into this canvas. 109*b1cdbd2cSJim Jagielski * If handle is present - we shouldn't paint anything further. 110*b1cdbd2cSJim Jagielski * May the remote window is already plugged. In such case we 111*b1cdbd2cSJim Jagielski * shouldn't paint it over. 112*b1cdbd2cSJim Jagielski */ paint( Graphics aGraphic )113*b1cdbd2cSJim Jagielski public void paint( Graphics aGraphic ) 114*b1cdbd2cSJim Jagielski { 115*b1cdbd2cSJim Jagielski if( maHandle == null ) 116*b1cdbd2cSJim Jagielski { 117*b1cdbd2cSJim Jagielski Dimension aSize = getSize(); 118*b1cdbd2cSJim Jagielski aGraphic.clearRect( 0, 0, aSize.width, aSize.height ); 119*b1cdbd2cSJim Jagielski } 120*b1cdbd2cSJim Jagielski } 121*b1cdbd2cSJim Jagielski 122*b1cdbd2cSJim Jagielski // ____________________ 123*b1cdbd2cSJim Jagielski 124*b1cdbd2cSJim Jagielski /** 125*b1cdbd2cSJim Jagielski * JNI interface of this class 126*b1cdbd2cSJim Jagielski * These two methods are implemented by using JNI mechanismen. 127*b1cdbd2cSJim Jagielski * The will be used to get the platform dependent window handle 128*b1cdbd2cSJim Jagielski * of a java awt canvas. This handle can be used to create an office 129*b1cdbd2cSJim Jagielski * window as direct child of it. So it's possible to plug Office 130*b1cdbd2cSJim Jagielski * windows in a java UI container. 131*b1cdbd2cSJim Jagielski * 132*b1cdbd2cSJim Jagielski * Note: 133*b1cdbd2cSJim Jagielski * Native code for windows register special function pointer to handle 134*b1cdbd2cSJim Jagielski * window messages ... But if it doesn't check for an already registered 135*b1cdbd2cSJim Jagielski * instance of this handler it will do it twice and produce a stack overflow 136*b1cdbd2cSJim Jagielski * because such method call herself in a never ending loop ... 137*b1cdbd2cSJim Jagielski * So we try to use the JNI code one times only and safe already getted 138*b1cdbd2cSJim Jagielski * informations inside this class. 139*b1cdbd2cSJim Jagielski */ getNativeWindowSystemType()140*b1cdbd2cSJim Jagielski public native int getNativeWindowSystemType(); getNativeWindow()141*b1cdbd2cSJim Jagielski private native long getNativeWindow(); // private! => use getHWND() with cache mechanism! 142*b1cdbd2cSJim Jagielski getHWND()143*b1cdbd2cSJim Jagielski public Integer getHWND() 144*b1cdbd2cSJim Jagielski { 145*b1cdbd2cSJim Jagielski if( maHandle == null ) 146*b1cdbd2cSJim Jagielski { 147*b1cdbd2cSJim Jagielski maHandle = new Integer( (int )getNativeWindow() ); 148*b1cdbd2cSJim Jagielski maSystem = getNativeWindowSystemType(); 149*b1cdbd2cSJim Jagielski } 150*b1cdbd2cSJim Jagielski return maHandle; 151*b1cdbd2cSJim Jagielski } 152*b1cdbd2cSJim Jagielski 153*b1cdbd2cSJim Jagielski // ____________________ 154*b1cdbd2cSJim Jagielski 155*b1cdbd2cSJim Jagielski /** 156*b1cdbd2cSJim Jagielski * for using of the JNI methods it's neccessary to load 157*b1cdbd2cSJim Jagielski * system library which exports it. 158*b1cdbd2cSJim Jagielski */ 159*b1cdbd2cSJim Jagielski static 160*b1cdbd2cSJim Jagielski { 161*b1cdbd2cSJim Jagielski System.loadLibrary( "nativeview" ); 162*b1cdbd2cSJim Jagielski } 163*b1cdbd2cSJim Jagielski 164*b1cdbd2cSJim Jagielski // ____________________ 165*b1cdbd2cSJim Jagielski 166*b1cdbd2cSJim Jagielski /** 167*b1cdbd2cSJim Jagielski * @member maHandle system window handle 168*b1cdbd2cSJim Jagielski * @member maSystem info about currently used platform 169*b1cdbd2cSJim Jagielski */ 170*b1cdbd2cSJim Jagielski public Integer maHandle ; 171*b1cdbd2cSJim Jagielski public int maSystem ; 172*b1cdbd2cSJim Jagielski } 173*b1cdbd2cSJim Jagielski 174