odk/examples/DevelopersGuide/OfficeDev/DesktopEnvironment/nativelib/windows/nativeview.c

   1 /*************************************************************************
   2  *
   3  *  $RCSfile: nativeview.c,v $
   4  *
   5  *  $Revision: 1.4 $
   6  *
   7  *  last change: $Author: rt $ $Date: 2005-01-31 16:42:03 $
   8  *
   9  *  The Contents of this file are made available subject to the terms of
  10  *  the BSD license.
  11  *
  12  *  Copyright (c) 2003 by Sun Microsystems, Inc.
  13  *  All rights reserved.
  14  *
  15  *  Redistribution and use in source and binary forms, with or without
  16  *  modification, are permitted provided that the following conditions
  17  *  are met:
  18  *  1. Redistributions of source code must retain the above copyright
  19  *     notice, this list of conditions and the following disclaimer.
  20  *  2. Redistributions in binary form must reproduce the above copyright
  21  *     notice, this list of conditions and the following disclaimer in the
  22  *     documentation and/or other materials provided with the distribution.
  23  *  3. Neither the name of Sun Microsystems, Inc. nor the names of its
  24  *     contributors may be used to endorse or promote products derived
  25  *     from this software without specific prior written permission.
  26  *
  27  *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  28  *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  29  *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  30  *  FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
  31  *  COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  32  *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  33  *  BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
  34  *  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  35  *  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
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  37  *  USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  38  *
  39  *************************************************************************/
  40
  41 #include <windows.h>
  42
  43 #include "jawt.h"
  44 #include "jawt_md.h"
  45 #include "NativeView.h"
  46
  47 #define MY_ASSERT(X,S) if (!X) { fprintf(stderr,"%s\n",S); return 0L;}
  48
  49 #define SYSTEM_WIN32   1
  50 #define SYSTEM_WIN16   2
  51 #define SYSTEM_JAVA    3
  52 #define SYSTEM_OS2     4
  53 #define SYSTEM_MAC     5
  54 #define SYSTEM_XWINDOW 6
  55
  56 // property name to register own window procedure on hwnd
  57 #define OLD_PROC_KEY "oldwindowproc"
  58 // signature of this window procedure
  59 static LRESULT APIENTRY NativeViewWndProc( HWND , UINT , WPARAM , LPARAM );
  60
  61 /*****************************************************************************
  62  *
  63  * Class      : NativeView
  64  * Method     : getNativeWindowSystemType
  65  * Signature  : ()I
  66  * Description: returns an identifier for the current operating system
  67  */
  68 JNIEXPORT jint JNICALL Java_NativeView_getNativeWindowSystemType
  69   (JNIEnv * env, jobject obj_this)
  70 {
  71     return (SYSTEM_WIN32);
  72 }
  73
  74 /*****************************************************************************
  75  *
  76  * Class      : NativeView
  77  * Method     : getNativeWindow
  78  * Signature  : ()J
  79  * Description: returns the native systemw window handle of this object
  80  */
  81 JNIEXPORT jlong JNICALL Java_NativeView_getNativeWindow
  82   (JNIEnv * env, jobject obj_this)
  83 {
  84     jboolean                      result  ;
  85     jint                          lock    ;
  86     JAWT                          awt     ;
  87     JAWT_DrawingSurface*          ds      ;
  88     JAWT_DrawingSurfaceInfo*      dsi     ;
  89     JAWT_Win32DrawingSurfaceInfo* dsi_win ;
  90     HDC                           hdc     ;
  91     HWND                          hWnd    ;
  92     LONG                          hFuncPtr;
  93
  94     /* Get the AWT */
  95     awt.version = JAWT_VERSION_1_3;
  96     result      = JAWT_GetAWT(env, &awt);
  97     MY_ASSERT(result!=JNI_FALSE,"wrong jawt version");
  98
  99     /* Get the drawing surface */
 100     if ((ds = awt.GetDrawingSurface(env, obj_this)) == NULL)
 101         return 0L;
 102
 103     /* Lock the drawing surface */
 104     lock = ds->Lock(ds);
 105     MY_ASSERT((lock & JAWT_LOCK_ERROR)==0,"can't lock the drawing surface");
 106
 107     /* Get the drawing surface info */
 108     dsi = ds->GetDrawingSurfaceInfo(ds);
 109
 110     /* Get the platform-specific drawing info */
 111     dsi_win = (JAWT_Win32DrawingSurfaceInfo*)dsi->platformInfo;
 112     hdc     = dsi_win->hdc;
 113     hWnd    = dsi_win->hwnd;
 114
 115     /* Free the drawing surface info */
 116     ds->FreeDrawingSurfaceInfo(dsi);
 117     /* Unlock the drawing surface */
 118     ds->Unlock(ds);
 119     /* Free the drawing surface */
 120     awt.FreeDrawingSurface(ds);
 121
 122     /* Register own window procedure
 123        Do it one times only! Otherwhise
 124        multiple instances will be registered
 125        and calls on such construct produce
 126        a stack overflow.
 127      */
 128     if (GetProp( hWnd, OLD_PROC_KEY )==0)
 129     {
 130         hFuncPtr = SetWindowLong( hWnd, GWL_WNDPROC, (DWORD)NativeViewWndProc );
 131         SetProp( hWnd, OLD_PROC_KEY, (HANDLE)hFuncPtr );
 132     }
 133
 134     return ((jlong)hWnd);
 135 }
 136
 137 /*****************************************************************************
 138  *
 139  * Class      : -
 140  * Method     : NativeViewWndProc
 141  * Signature  : -
 142  * Description: registered window handler to intercept window messages between
 143  *              java and office process
 144  */
 145 static LRESULT APIENTRY NativeViewWndProc(
 146     HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
 147 {
 148     HANDLE hFuncPtr;
 149
 150     /* resize new created child window to fill out the java window complete */
 151     if (uMsg==WM_PARENTNOTIFY)
 152     {
 153         if (wParam == WM_CREATE)
 154         {
 155             RECT rect;
 156             HWND hChild = (HWND) lParam;
 157
 158             GetClientRect(hWnd, &rect);
 159
 160             SetWindowPos(hChild,
 161                         NULL,
 162                         rect.left,
 163                         rect.top,
 164                         rect.right - rect.left,
 165                         rect.bottom - rect.top,
 166                         SWP_NOZORDER);
 167         }
 168     }
 169     /* handle normal resize events */
 170     else if(uMsg==WM_SIZE)
 171     {
 172         WORD newHeight = HIWORD(lParam);
 173         WORD newWidth  = LOWORD(lParam);
 174         HWND hChild    = GetWindow(hWnd, GW_CHILD);
 175
 176         if (hChild != NULL)
 177             SetWindowPos(hChild, NULL, 0, 0, newWidth, newHeight, SWP_NOZORDER);
 178     }
 179
 180     /* forward request to original handler which is intercepted by this window procedure */
 181     hFuncPtr = GetProp(hWnd, OLD_PROC_KEY);
 182     MY_ASSERT(hFuncPtr,"lost original window proc handler");
 183     return CallWindowProc( hFuncPtr, hWnd, uMsg, wParam, lParam);
 184 }