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/* qtscrollpanepeer.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 <QScrollArea>

#include <QScrollBar>

#include <gnu_java_awt_peer_qt_QtScrollPanePeer.h>

#include "qtcomponent.h"

#include "containers.h"

#include "mainthreadinterface.h"

#include "componentevent.h"

#include "keybindings.h"

// Constants in java.awt.ScrollPane

#define SCROLLBARS_AS_NEEDED    0

#define SCROLLBARS_ALWAYS       1

#define SCROLLBARS_NEVER        2

class MyScrollArea : public QScrollArea

{

public:

  MyScrollArea(JNIEnv *env, jobject obj, QWidget *parent) : QScrollArea( parent )

  {

    setup(env, obj);

  }

  ~MyScrollArea()

  {

    destroy();

  }

#define I_KNOW_WHAT_IM_DOING

#define PARENT QScrollArea

#include "eventmethods.h"

};

class ScrollPanePolicy : public AWTEvent {

 private:

  QScrollArea *widget;

  Qt::ScrollBarPolicy policy;

 public:

  ScrollPanePolicy(QScrollArea *w, Qt::ScrollBarPolicy p) : AWTEvent()

  {

    widget = w;

    policy = p;

  }

  void runEvent()

  {

    widget->setHorizontalScrollBarPolicy(policy);

    widget->setVerticalScrollBarPolicy(policy);

  }

};

/**

 * Returns the child widget, given the owner Component.

 */

QWidget *scrollPaneChildWidget( JNIEnv *env, jobject component )

{

  jclass scrollpaneCls = env->FindClass( "java/awt/ScrollPane" );

  jmethodID getPeerMID = env->GetMethodID( scrollpaneCls,

                                           "getPeer",

                                           "()Ljava/awt/peer/ComponentPeer;");

  assert(getPeerMID != 0);

  jobject scrollpanepeerobj = env->CallObjectMethod( component, getPeerMID, NULL );

  QScrollArea *view = (QScrollArea *) getNativeObject( env, scrollpanepeerobj );

  assert(view != 0);

  return view->viewport();

}

/*

 * Creates a QScrollArea object.

 */

JNIEXPORT void JNICALL Java_gnu_java_awt_peer_qt_QtScrollPanePeer_init

(JNIEnv *env, jobject obj)

{

  QWidget *parentWidget = (QWidget *) getParentWidget( env, obj );

  assert( parentWidget );

  //  QScrollArea *pane = new MyScrollArea( env, obj, parentWidget );

  QScrollArea *pane = new QScrollArea( parentWidget );

  assert( pane );

  setNativeObject( env, obj, pane );

}

/*

 * Resize the child.

 */

JNIEXPORT void JNICALL Java_gnu_java_awt_peer_qt_QtScrollPanePeer_childResized

(JNIEnv *env, jobject obj, jint w, jint h)

{

  QScrollArea *view = (QScrollArea *) getNativeObject( env, obj );

  assert( view );

  QWidget *child = view->viewport();

  assert( child );

  //  child->setGeometry( 0, 0, w, h );

//   child->update();

  mainThread->postEventToMain( new AWTResizeEvent(child, 0, 0, w, h) );

}

/*

 * Returns the horizontal scrollbar height.

 */

JNIEXPORT jint JNICALL Java_gnu_java_awt_peer_qt_QtScrollPanePeer_getHScrollbarHeight

(JNIEnv *env, jobject obj)

{

  QScrollArea *pane = (QScrollArea *) getNativeObject( env, obj );

  assert( pane );

  QScrollBar *hbar = pane->horizontalScrollBar();

  if(hbar == NULL)

    return 0;

  if(!hbar->isVisible())

    return 0;

  int height = hbar->height();

  return height;

}

/*

 * Returns the vertical scrollbar width.

 */

JNIEXPORT jint JNICALL Java_gnu_java_awt_peer_qt_QtScrollPanePeer_getVScrollbarWidth

(JNIEnv *env, jobject obj)

{

  QScrollArea *pane = (QScrollArea *) getNativeObject( env, obj );

  assert( pane );

  QScrollBar *vbar = pane->verticalScrollBar();

  if(vbar == NULL)

    return 0;

  if(!vbar->isVisible())

    return 0;

  int width = vbar->width();

  return width;

}

/*

 * Sets the current upper-left corner to x, y.

 */

JNIEXPORT void JNICALL Java_gnu_java_awt_peer_qt_QtScrollPanePeer_setScrollPosition

(JNIEnv *env, jobject obj, jint x, jint y)

{

  QScrollArea *pane = (QScrollArea *) getNativeObject( env, obj );

  assert( pane );

  // pane->scrollContentsBy( x, y );

}

/*

 * Sets the scrollbar policy

 */

JNIEXPORT void JNICALL Java_gnu_java_awt_peer_qt_QtScrollPanePeer_setPolicy

(JNIEnv *env, jobject obj, jint policy)

{

  QScrollArea *pane = (QScrollArea *) getNativeObject( env, obj );

  assert( pane );

  Qt::ScrollBarPolicy qtpolicy;

  switch( policy )

    {

    case SCROLLBARS_ALWAYS:

      qtpolicy = Qt::ScrollBarAlwaysOn;

      break;

    case SCROLLBARS_NEVER:

      qtpolicy = Qt::ScrollBarAlwaysOff;

      break;

    default:

    case SCROLLBARS_AS_NEEDED:

      qtpolicy = Qt::ScrollBarAsNeeded;

      break;

   }

  mainThread->postEventToMain( new ScrollPanePolicy( pane, qtpolicy ) );

}