popupmenueditor.cpp

Trolltech公司发布的基于C++图形开发环境

/**********************************************************************
** Copyright (C) 2003 Trolltech AS.  All rights reserved.
**
** This file is part of Qt Designer.
**
** This file may be distributed and/or modified under the terms of the
** GNU General Public License version 2 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.
**
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** licenses may use this file in accordance with the Qt Commercial License
** Agreement provided with the Software.
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** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
** See http://www.trolltech.com/gpl/ for GPL licensing information.
** See http://www.trolltech.com/pricing.html or email [e-mail] for
**   information about Qt Commercial License Agreements.
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#include <qapplication.h>
#include <qcstring.h>
#include <qdatastream.h>
#include <qdragobject.h>
#include <qlineedit.h>
#include <qobjectlist.h>
#include <qpainter.h>
#include <qpopupmenu.h>
#include <qrect.h>
#include <qsize.h>
#include <qstyle.h>
#include <qtimer.h>
#include "actiondnd.h"
#include "actioneditorimpl.h"
#include "command.h"
#include "formfile.h"
#include "formwindow.h"
#include "mainwindow.h"
#include "metadatabase.h"
#include "pixmapchooser.h"
#include "popupmenueditor.h"
#include "menubareditor.h"

// Drag Object Declaration -------------------------------------------

class PopupMenuEditorItemPtrDrag : public QStoredDrag
{
public:
    PopupMenuEditorItemPtrDrag( PopupMenuEditorItem * item, QWidget * parent = 0,
				const char * name = 0 );
    ~PopupMenuEditorItemPtrDrag() {};
    static bool canDecode( QDragMoveEvent * e );
    static bool decode( QDropEvent * e, PopupMenuEditorItem ** i );
};

// Drag Object Implementation ---------------------------------------

PopupMenuEditorItemPtrDrag::PopupMenuEditorItemPtrDrag( PopupMenuEditorItem * item,
							QWidget * parent, const char * name )
    : QStoredDrag( "qt/popupmenueditoritemptr", parent, name )
{
    QByteArray data( sizeof( Q_LONG ) );
    QDataStream stream( data, IO_WriteOnly );
    stream << ( Q_LONG ) item;
    setEncodedData( data );
}

bool PopupMenuEditorItemPtrDrag::canDecode( QDragMoveEvent * e )
{
    return e->provides( "qt/popupmenueditoritemptr" );
}

bool PopupMenuEditorItemPtrDrag::decode( QDropEvent * e, PopupMenuEditorItem ** i )
{
    QByteArray data = e->encodedData( "qt/popupmenueditoritemptr" );
    QDataStream stream( data, IO_ReadOnly );

    if ( !data.size() )
	return FALSE;

    Q_LONG p = 0;
    stream >> p;
    *i = ( PopupMenuEditorItem *) p;

    return TRUE;
}

// PopupMenuEditorItem Implementation -----------------------------------

PopupMenuEditorItem::PopupMenuEditorItem( PopupMenuEditor * menu, QObject * parent, const char * name )
    : QObject( parent, name ),
      a( 0 ),
      s( 0 ),
      m( menu ),
      separator( FALSE ),
      removable( FALSE )
{
    init();
    a = new QAction( this );
    QObject::connect( a, SIGNAL( destroyed() ), this, SLOT( selfDestruct() ) );
}


PopupMenuEditorItem::PopupMenuEditorItem( QAction * action, PopupMenuEditor * menu,
					  QObject * parent, const char * name )
    : QObject( parent, name ),
      a( action ),
      s( 0 ),
      m( menu ),
      separator( FALSE ),
      removable( TRUE )
{
    init();
    if ( /*a->name() == "qt_separator_action" ||*/ ::qt_cast<QSeparatorAction*>(a) )
	separator = TRUE;
    if ( a && a->children() )
 	a->installEventFilter( this );
}

PopupMenuEditorItem::PopupMenuEditorItem( PopupMenuEditorItem * item, PopupMenuEditor * menu,
					  QObject * parent, const char * name )
    : QObject( parent, name ),
      a( item->a ),
      s( 0 ),
      m( menu ),
      separator( item->separator ),
      removable( item->removable )
{
    init();
    if ( ::qt_cast<QActionGroup*>(a) )
 	a->installEventFilter( this );
}

PopupMenuEditorItem::~PopupMenuEditorItem()
{

}

void PopupMenuEditorItem::init()
{
    if ( a ) {
	QObject::connect( a, SIGNAL( destroyed() ), this, SLOT( selfDestruct() ) );
	if ( m && !isSeparator() ) {
	    s = new PopupMenuEditor( m->formWindow(), m );
	    QString n = "popupMenu";
	    m->formWindow()->unify( s, n, TRUE );
	    s->setName( n );
	    MetaDataBase::addEntry( s );
	}
    }
}

PopupMenuEditorItem::ItemType PopupMenuEditorItem::type() const
{
    if ( separator )
	return Separator;
    else if ( a )
	return Action;
    return Unknown;
}

void PopupMenuEditorItem::setVisible( bool enable )
{
    if ( a )
	a->setVisible( enable );
}

bool PopupMenuEditorItem::isVisible() const
{
    QActionGroup *g = ::qt_cast<QActionGroup*>(a);
    if ( g )
	return ( g->isVisible() && g->usesDropDown() );
    else if ( a )
	return a->isVisible();
    return FALSE;
}

void PopupMenuEditorItem::showMenu( int x, int y )
{
    if ( ( !separator ) && s ) {
	s->move( x, y );
	s->show();
	s->raise();
    }
}

void PopupMenuEditorItem::hideMenu()
{
    if ( s ) {
	s->hideSubMenu();
	s->hide();
    }
}

void PopupMenuEditorItem::focusOnMenu()
{
    if ( s ) {
	s->showSubMenu();
	s->setFocus();
    }
}

int PopupMenuEditorItem::count() const
{
    if ( s ) {
	return s->count();
    } else if ( ::qt_cast<QActionGroup*>(a) ) {
	const QObjectList * l = a->children();
	if ( l )
	    return l->count();
    }
    return 0;
}

bool PopupMenuEditorItem::eventFilter( QObject * o, QEvent * event )
{
    if ( ! ::qt_cast<QActionGroup*>( o ) )
	return FALSE;
    if ( event->type() == QEvent::ChildInserted ) {
	QChildEvent * ce = ( QChildEvent * ) event;
	QObject * c = ce->child();
	QAction * action = ::qt_cast<QAction*>( c );
	if ( s->find( action ) != -1 ) // avoid duplicates
	    return FALSE;
	QActionGroup * actionGroup = ::qt_cast<QActionGroup*>( c );
	if ( actionGroup )
	    s->insert( actionGroup );
 	else if ( action )
 	    s->insert( action );
    }
    return FALSE;
}

void PopupMenuEditorItem::selfDestruct()
{
    hideMenu();
    int i = m->find( s );
    if ( i != -1 && i < m->count() )
	m->remove( i ); // remove this item
    a = 0; // the selfDestruct call was caused by the deletion of the action
    delete this;
}

// PopupMenuEditor Implementation -----------------------------------

PopupMenuEditorItem * PopupMenuEditor::draggedItem = 0;
int PopupMenuEditor::clipboardOperation = 0;
PopupMenuEditorItem * PopupMenuEditor::clipboardItem = 0;

PopupMenuEditor::PopupMenuEditor( FormWindow * fw, QWidget * parent, const char * name )
    : QWidget( 0, name, WStyle_Customize | WStyle_NoBorder | WRepaintNoErase | WResizeNoErase ),
      formWnd( fw ),
      parentMenu( parent ),
      iconWidth( 0 ),
      textWidth( 0 ),
      accelWidth( 0 ),
      arrowWidth( 30 ),
      borderSize( 2 ),
      currentField( 1 ),
      currentIndex( 0 )
{
    init();
}

PopupMenuEditor::PopupMenuEditor( FormWindow * fw, PopupMenuEditor * menu,
				  QWidget * parent, const char * name )
    : QWidget( 0, name, WStyle_Customize | WStyle_NoBorder | WRepaintNoErase ),
      formWnd( fw ),
      parentMenu( parent ),
      iconWidth( menu->iconWidth ),
      textWidth( menu->textWidth ),
      accelWidth( menu->accelWidth ),
      arrowWidth( menu->arrowWidth ),
      borderSize( menu->borderSize ),
      currentField( menu->currentField ),
      currentIndex( menu->currentIndex )
{
    init();
    PopupMenuEditorItem * i;
    for ( i = menu->itemList.first(); i; i = menu->itemList.next() ) {
	PopupMenuEditorItem * n = new PopupMenuEditorItem( i, this );
	itemList.append( n );
    }
}

PopupMenuEditor::~PopupMenuEditor()
{
    itemList.setAutoDelete( TRUE );
}

void PopupMenuEditor::init()
{
    reparent( ( QMainWindow * ) formWnd->mainContainer(), pos() );

    addItem.action()->setMenuText( tr("new item") );
    addSeparator.action()->setMenuText( tr("new separator") );

    setAcceptDrops( TRUE );
    setFocusPolicy( StrongFocus );

    lineEdit = new QLineEdit( this );
    lineEdit->hide();
    lineEdit->setFrameStyle(QFrame::Plain | QFrame::NoFrame);
    lineEdit->polish();
    lineEdit->setBackgroundOrigin(ParentOrigin);
    lineEdit->setBackgroundMode(PaletteButton);
    lineEdit->installEventFilter( this );

    dropLine = new QWidget( this, 0, Qt::WStyle_NoBorder | WStyle_StaysOnTop );
    dropLine->setBackgroundColor( Qt::red );
    dropLine->hide();

    hide();
}

void PopupMenuEditor::insert( PopupMenuEditorItem * item, int index )
{
    if ( !item )
	return;
    if ( index == -1 ) {
	itemList.append( item );
	if ( isVisible() )
	    currentIndex = itemList.count() - 1;
    } else {
	itemList.insert( index, item );
	if ( isVisible() )
	    currentIndex = index;
    }
    item->m = this;
    item->s->parentMenu = this;
    resizeToContents();
    if ( isVisible() && parentMenu )
	parentMenu->update(); // draw arrow in parent menu
    emit inserted( item->action() );
}

void PopupMenuEditor::insert( QAction * action, int index )
{
    if ( !action )
	return;
    insert( new PopupMenuEditorItem( action, this, 0, action->name() ), index );
}

void PopupMenuEditor::insert( QActionGroup * actionGroup, int index )
{
    if ( !actionGroup )
	return;
    bool dropdown = actionGroup->usesDropDown();
    PopupMenuEditorItem *i = new PopupMenuEditorItem( (QAction *)actionGroup, this, 0,
						      QString( actionGroup->name() ) + "Menu" );
    QActionGroup *g = 0;
    QObjectList *l = actionGroup->queryList( "QAction", 0, FALSE, FALSE );
    QObjectListIterator it( *l );
    insert( i, index );
    for ( ; it.current(); ++it ) {
	g = ::qt_cast<QActionGroup*>(it.current());
	if ( g ) {
	    if ( dropdown )
		i->s->insert( g );
	    else
		insert( g );
	} else {
	    i->s->insert( (QAction*)it.current() );
	}
    }
    delete l;
}

int PopupMenuEditor::find( const QAction * action )
{
    PopupMenuEditorItem * i = itemList.first();
    while ( i ) {
	if ( i->action() == action )
	    return itemList.at();
	i = itemList.next();
    }
    return -1;
}

int PopupMenuEditor::find( PopupMenuEditor * menu )
{
    PopupMenuEditorItem * i = itemList.first();
    while ( i ) {
	if ( i->subMenu() == menu )
	    return itemList.at();
	i = itemList.next();
    }
    return -1;
}

int PopupMenuEditor::count()
{
    return itemList.count();
}

PopupMenuEditorItem * PopupMenuEditor::at( int index )
{
    return itemList.at( index );
}

void PopupMenuEditor::exchange( int a, int b )
{
    PopupMenuEditorItem * ia = itemList.at( a );
    PopupMenuEditorItem * ib = itemList.at( b );
    if ( !ia || !ib ||
	 ia == &addItem || ia == &addSeparator ||
	 ib == &addItem || ib == &addSeparator )
	return; // do nothing
    itemList.replace( b, ia );
    itemList.replace( a, ib );
}

void PopupMenuEditor::cut( int index )
{
    int idx = ( index == -1 ? currentIndex : index );

    if ( clipboardItem && clipboardOperation == Cut )
	delete clipboardItem;

    clipboardOperation = Cut;
    clipboardItem = itemList.at( idx );

    if ( clipboardItem == &addItem || clipboardItem == &addSeparator ) {
	clipboardOperation = None;
	clipboardItem = 0;
	return; // do nothing
    }

    RemoveActionFromPopupCommand * cmd =
	new RemoveActionFromPopupCommand( "Cut Item", formWnd, this, idx );
    formWnd->commandHistory()->addCommand( cmd );
    cmd->execute();
}

void PopupMenuEditor::copy( int index )
{
    int idx = ( index == -1 ? currentIndex : index );

    if ( clipboardItem && clipboardOperation == Cut )
	delete clipboardItem;

    clipboardOperation = Copy;
    clipboardItem = itemList.at( idx );

    if ( clipboardItem == &addItem || clipboardItem == &addSeparator ) {
	clipboardOperation = None;
	clipboardItem = 0;
    }
}

void PopupMenuEditor::paste( int index )
{
    int idx = ( index == -1 ? currentIndex : index );

    if ( clipboardItem && clipboardOperation ) {
	PopupMenuEditorItem * n = new PopupMenuEditorItem( clipboardItem, this );
	AddActionToPopupCommand * cmd =
	    new AddActionToPopupCommand( "Paste Item", formWnd, this, n, idx );
	formWnd->commandHistory()->addCommand( cmd );
	cmd->execute();
    }
}

void PopupMenuEditor::insertedActions( QPtrList<QAction> & list )
{
    QAction * a = 0;
    PopupMenuEditorItem * i = itemList.first();

    while ( i ) {
	a = i->action();
	if ( a )
	    list.append( a );
	i = itemList.next();
    }
}

void PopupMenuEditor::show()
{
    resizeToContents();
    QWidget::show();
}

void PopupMenuEditor::choosePixmap( int index )
{