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/* qtmenupeer.cpp --

   Copyright (C)  2005  Free Software Foundation, Inc.

This file is part of GNU Classpath.

GNU Classpath is free software; you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

the Free Software Foundation; either version 2, or (at your option)

any later version.

GNU Classpath is distributed in the hope that it will be useful, but

WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

General Public License for more details.

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

along with GNU Classpath; see the file COPYING.  If not, write to the

Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA

02110-1301 USA.

Linking this library statically or dynamically with other modules is

making a combined work based on this library.  Thus, the terms and

conditions of the GNU General Public License cover the whole

combination.

As a special exception, the copyright holders of this library give you

permission to link this library with independent modules to produce an

executable, regardless of the license terms of these independent

modules, and to copy and distribute the resulting executable under

terms of your choice, provided that you also meet, for each linked

independent module, the terms and conditions of the license of that

module.  An independent module is a module which is not derived from

or based on this library.  If you modify this library, you may extend

this exception to your version of the library, but you are not

obligated to do so.  If you do not wish to do so, delete this

exception statement from your version. */

#include <assert.h>

#include <QMenu>

#include <gnu_java_awt_peer_qt_QtMenuPeer.h>

#include "nativewrapper.h"

#include "qtstrings.h"

#include "mainthreadinterface.h"

#include "slotcallbacks.h"

#include "componentevent.h"

typedef enum ActionType {

  ActionMenu,

  ActionItem,

  ActionSeparator

} ActionType;

// Sets the title, but also tear-off.

class MenuTitleEvent : public AWTEvent {

 private:

  QMenu *widget;

  QString *string;

  bool tearOff;

 public:

  MenuTitleEvent(QMenu *w, QString *s, bool tear) : AWTEvent()

  {

    widget = w;

    string = s;

    tearOff = tear;

  }

  void runEvent()

  {

    if (tearOff)

      widget->setTearOffEnabled( true );

    else

      {

        widget->setTitle( *string );

        delete string;

      }

  }

};

class MenuAction : public AWTEvent {

 private:

  QMenu *menu;

  QAction *action;

  ActionType actionType; // type of action to add

  JavaVM *vm;

  jobject menuPeer;

  jobject itemPeer;

public:

  MenuAction(JNIEnv *env, jobject mp, jobject ip, QMenu *m, QAction *a,

             ActionType actionType) : AWTEvent()

  {

    menu = m;

    action = a;

    this->actionType = actionType;

    env->GetJavaVM( &vm );

    menuPeer = env->NewGlobalRef( mp );

    if( ip != NULL )

      itemPeer = env->NewGlobalRef( ip );

    else

      itemPeer = NULL;

  }

  void runEvent()

  {

    JNIEnv *env;

    vm->GetEnv((void **)&env, JNI_VERSION_1_1);

    if (actionType == ActionMenu)

      menu->addMenu ((QMenu *) action);

    else

      menu->addAction (action);

    jclass menuCls = env->GetObjectClass( menuPeer );

    jmethodID mid = env->GetMethodID(menuCls, "add", "(J)V");

    env->DeleteLocalRef(menuCls);

    env->CallVoidMethod( menuPeer, mid, (jlong)action );

    env->DeleteGlobalRef( menuPeer );

    if( itemPeer != NULL )

      {

        setNativeObject( env, itemPeer, action );

        connectAction(action, env, itemPeer);

        env->DeleteGlobalRef( itemPeer );

      }

  }

};

class MenuRemoveAction : public AWTEvent {

 private:

  QMenu *menu;

  QAction *action;

public:

  MenuRemoveAction(QMenu *m, QAction *a) : AWTEvent()

  {

    menu = m;

    action = a;

  }

  void runEvent()

  {

    if (action)

      menu->removeAction(action);

  }

};

/*

 * Constructs a QMenu item

 */

JNIEXPORT void JNICALL Java_gnu_java_awt_peer_qt_QtMenuPeer_init

(JNIEnv *env, jobject obj)

{

  QMenu *menu = new QMenu();

  assert( menu );

  setNativeObject( env, obj, menu );

}

/**

 * Allows tear-off: Only called once, if ever.

 */

JNIEXPORT void JNICALL Java_gnu_java_awt_peer_qt_QtMenuPeer_allowTearOff

(JNIEnv *env, jobject obj)

{

  QMenu *menu = (QMenu *)getNativeObject( env, obj );

  assert( menu );

  mainThread->postEventToMain( new MenuTitleEvent( menu, NULL, true ) );

}

/*

 * Inserts a seperator.

 */

JNIEXPORT void JNICALL Java_gnu_java_awt_peer_qt_QtMenuPeer_insertSeperator

(JNIEnv *env, jobject obj)

{

  QMenu *menu = (QMenu *)getNativeObject( env, obj );

  assert( menu );

  mainThread->postEventToMain( new MenuAction( env, obj, NULL,

                                               menu, NULL, ActionSeparator ) );

}

/*

 * Inserts an item.

 */

JNIEXPORT void JNICALL Java_gnu_java_awt_peer_qt_QtMenuPeer_insertItem

(JNIEnv *env, jobject obj, jobject item)

{

  QMenu *menu = (QMenu *)getNativeObject( env, obj );

  assert( menu );

  QAction *action = (QAction *)getNativeObject( env, item );

  assert( action );

  mainThread->postEventToMain( new MenuAction( env, obj, item, menu, action, ActionItem ));

}

/*

 * Inserts a sub-menu

 */

JNIEXPORT void JNICALL Java_gnu_java_awt_peer_qt_QtMenuPeer_insertMenu

(JNIEnv *env, jobject obj, jobject menu)

{

  assert( menu );

  QMenu *thisMenu = (QMenu *)getNativeObject( env, obj );

  assert( thisMenu );

  QMenu *insMenu = (QMenu *)getNativeObject(env, menu);

  assert( insMenu );

  mainThread->postEventToMain( new MenuAction( env, obj, menu, thisMenu, (QAction *)insMenu, ActionMenu ) );

}

/*

 * Removes an item at index.

 */

JNIEXPORT void JNICALL Java_gnu_java_awt_peer_qt_QtMenuPeer_delItem

(JNIEnv *env, jobject obj, jlong ptr)

{

  QMenu *menu = (QMenu *)getNativeObject( env, obj );

  assert( menu );

  QAction *action = (QAction *)ptr;

  mainThread->postEventToMain( new MenuRemoveAction( menu, action ) );

}

/*

 * Enables/Disables the menu.

 */

JNIEXPORT void JNICALL Java_gnu_java_awt_peer_qt_QtMenuPeer_setEnabled

(JNIEnv *env, jobject obj, jboolean enabled)

{

  QMenu *menu = (QMenu *)getNativeObject( env, obj );

  assert( menu );

  mainThread->postEventToMain(new AWTEnableEvent(menu, (enabled == JNI_TRUE)));

}

/*

 * Sets the menu title.

 */

JNIEXPORT void JNICALL Java_gnu_java_awt_peer_qt_QtMenuPeer_setLabel

(JNIEnv *env, jobject obj, jstring label)

{

  if(label == NULL)

    return;

  QMenu *menu = (QMenu *)getNativeObject( env, obj );

  assert( menu );

  QString *qStr = getQString(env, label);

  mainThread->postEventToMain( new MenuTitleEvent( menu, qStr, false ) );

}