1 /*

     2  * Copyright 1995-2002 Sun Microsystems, Inc.  All Rights Reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.  Sun designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Sun in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    22  * CA 95054 USA or visit www.sun.com if you need additional information or

    23  * have any questions.

    24  */

    25 #ifdef HEADLESS

    26     #error This file should not be included in headless library

    27 #endif

    28 

    29 #include "awt_p.h"

    30 #include "java_awt_Canvas.h"

    31 #include "sun_awt_motif_MCanvasPeer.h"

    32 #include "sun_awt_motif_MComponentPeer.h"

    33 #include "color.h"

    34 #include "canvas.h"

    35 #include "awt_util.h"

    36 

    37 #include "awt_Component.h"

    38 #include "awt_GraphicsEnv.h"

    39 

    40 #include <jni.h>

    41 #include <jni_util.h>

    42 #include "multi_font.h"

    43 

    44 extern struct MComponentPeerIDs mComponentPeerIDs;

    45 extern struct X11GraphicsConfigIDs x11GraphicsConfigIDs;

    46 extern AwtGraphicsConfigDataPtr

    47     copyGraphicsConfigToPeer(JNIEnv *env, jobject this);

    48 struct CanvasIDs mCanvasIDs;

    49 

    50 /*

    51  * Class:     sun_awt_motif_MCanvasPeer

    52  * Method:    create

    53  * Signature: (Lsun/awt/motif/MComponentPeer;)V

    54  */

    55 JNIEXPORT void JNICALL Java_sun_awt_motif_MCanvasPeer_create

    56   (JNIEnv * env, jobject this, jobject parent)

    57 {

    58     AwtGraphicsConfigDataPtr awtData;

    59 

    60     struct CanvasData *wdata;

    61     struct CanvasData *cdata;

    62     jobject globalRef = awtJNI_CreateAndSetGlobalRef(env, this);

    63 

    64     AWT_LOCK();

    65     if (JNU_IsNull(env, parent)) {

    66         JNU_ThrowNullPointerException(env, "NullPointerException");

    67         AWT_UNLOCK();

    68         return;

    69     }

    70 

    71     cdata = (struct CanvasData *)

    72         JNU_GetLongFieldAsPtr(env, parent, mComponentPeerIDs.pData);

    73     if (cdata == NULL) {

    74         JNU_ThrowNullPointerException(env, "NullPointerException");

    75         AWT_UNLOCK();

    76         return;

    77     }

    78 

    79     wdata = ZALLOC(CanvasData);

    80     if (wdata == NULL) {

    81         JNU_ThrowOutOfMemoryError(env, "OutOfMemoryError");

    82         AWT_UNLOCK();

    83         return;

    84     }

    85     JNU_SetLongFieldFromPtr(env, this, mComponentPeerIDs.pData, wdata);

    86 

    87     awtData = copyGraphicsConfigToPeer(env, this);

    88 

    89     wdata->comp.widget = awt_canvas_create((XtPointer) globalRef,

    90                                            cdata->comp.widget,

    91                                            "",

    92                                            1, 1, False, NULL, awtData);

    93     XtVaSetValues(wdata->comp.widget,

    94                   XmNinsertPosition, awt_util_insertCallback,

    95                   NULL);

    96 

    97     /* Add an event handler so that we can track focus change requests

    98        which will be initiated by Motif in response to ButtonPress events */

    99 

   100     wdata->flags = 0;

   101     wdata->shell = cdata->shell;

   102 

   103     AWT_UNLOCK();

   104 }

   105 

   106 /*

   107  * Class:     sun_awt_motif_MCanvasPeer

   108  * Method:    resetTargetGC

   109  * Signature: ()V

   110  */

   111 JNIEXPORT void JNICALL Java_sun_awt_motif_MCanvasPeer_resetTargetGC

   112 (JNIEnv * env, jobject this, jobject target)

   113 {

   114     (*env)->CallVoidMethod(env, target, mCanvasIDs.setGCFromPeerMID);

   115 }

   116 

   117 /*

   118  * Class:     sun_awt_motif_MCanvasPeer

   119  * Method:    initIDs

   120  * Signature: ()V

   121  */

   122 JNIEXPORT void JNICALL Java_sun_awt_motif_MCanvasPeer_initIDs

   123 (JNIEnv * env, jclass cls)

   124 {

   125     jclass canvasCls = (*env)->FindClass(env, "java/awt/Canvas");

   126     mCanvasIDs.setGCFromPeerMID =

   127      (*env)->GetMethodID(env, canvasCls, "setGCFromPeer","()V");

   128 

   129     DASSERT(mCanvasIDs.setGCFromPeerMID);

   130 }