actiondnd.cpp

Trolltech公司发布的基于C++图形开发环境

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** Copyright (C) 2000-2002 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.
**
** Licensees holding valid Qt Enterprise Edition or Qt Professional Edition
** licenses may use this file in accordance with the Qt Commercial License
** Agreement provided with the Software.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** 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 "actiondnd.h"
#include "command.h"
#include "defs.h"
#include "formwindow.h"
#include "mainwindow.h"
#include "metadatabase.h"
#include "widgetfactory.h"
#include "hierarchyview.h"

#include <qaction.h>
#include <qapplication.h>
#include <qbitmap.h>
#include <qdragobject.h>
#include <qinputdialog.h>
#include <qlayout.h>
#include <qmainwindow.h>
#include <qmenudata.h>
#include <qmessagebox.h>
#include <qobjectlist.h>
#include <qpainter.h>
#include <qstyle.h>
#include <qtimer.h>

QAction *ActionDrag::the_action = 0;

ActionDrag::ActionDrag(QAction *action, QWidget *source)
: QStoredDrag("application/x-designer-actions", source)
{
    Q_ASSERT(the_action == 0);
    the_action = action;
}

ActionDrag::ActionDrag(QActionGroup *group, QWidget *source)
: QStoredDrag("application/x-designer-actiongroup", source)
{
    Q_ASSERT(the_action == 0);
    the_action = group;
}

ActionDrag::ActionDrag(const QString &type, QAction *action, QWidget *source)
: QStoredDrag(type, source)
{
    Q_ASSERT(the_action == 0);
    the_action = action;
}

bool ActionDrag::canDecode(QDropEvent *e)
{
    return e->provides( "application/x-designer-actions" ) ||
	   e->provides( "application/x-designer-actiongroup" ) ||
	   e->provides( "application/x-designer-separator" );
}

ActionDrag::~ActionDrag()
{
    the_action = 0;
}

void QDesignerAction::init()
{
    MetaDataBase::addEntry( this );
    int id = WidgetDatabase::idFromClassName( WidgetFactory::classNameOf( this ) );
    WidgetFactory::saveDefaultProperties( this, id );
    WidgetFactory::saveChangedProperties( this, id );
}

void QDesignerActionGroup::init()
{
    MetaDataBase::addEntry( this );
    int id = WidgetDatabase::idFromClassName( WidgetFactory::classNameOf( this ) );
    WidgetFactory::saveDefaultProperties( this, id );
    WidgetFactory::saveChangedProperties( this, id );
}

bool QDesignerAction::addTo( QWidget *w )
{
    if ( !widgetToInsert )
	return QAction::addTo( w );

    if ( ::qt_cast<QPopupMenu*>(w) )
	return FALSE;

    widgetToInsert->reparent( w, QPoint( 0, 0 ), FALSE );
    widgetToInsert->show();
    addedTo( widgetToInsert, w );
    return TRUE;
}

bool QDesignerAction::removeFrom( QWidget *w )
{
    if ( !widgetToInsert )
	return QAction::removeFrom( w );

    remove();
    return TRUE;
}

void QDesignerAction::remove()
{
    if ( !widgetToInsert )
	return;
    MainWindow::self->formWindow()->selectWidget( widgetToInsert, FALSE );
    widgetToInsert->reparent( 0, QPoint( 0, 0 ), FALSE );
}

class QDesignerIndicatorWidget : public QWidget
{
    Q_OBJECT

public:
    QDesignerIndicatorWidget( QWidget *p )
	: QWidget( p, "qt_dockwidget_internal" ) {
	    setBackgroundColor( red );
    }

};

QDesignerToolBarSeparator::QDesignerToolBarSeparator(Orientation o , QToolBar *parent,
                                     const char* name )
    : QWidget( parent, name )
{
    connect( parent, SIGNAL(orientationChanged(Orientation)),
             this, SLOT(setOrientation(Orientation)) );
    setOrientation( o );
    setBackgroundMode( parent->backgroundMode() );
    setBackgroundOrigin( ParentOrigin );
    setSizePolicy( QSizePolicy( QSizePolicy::Minimum, QSizePolicy::Minimum ) );
}

void QDesignerToolBarSeparator::setOrientation( Orientation o )
{
    orient = o;
}

void QDesignerToolBarSeparator::styleChange( QStyle& )
{
    setOrientation( orient );
}

QSize QDesignerToolBarSeparator::sizeHint() const
{
    int extent = style().pixelMetric( QStyle::PM_DockWindowSeparatorExtent,
				      this );
    if ( orient == Horizontal )
	return QSize( extent, 0 );
    else
	return QSize( 0, extent );
}

void QDesignerToolBarSeparator::paintEvent( QPaintEvent * )
{
    QPainter p( this );
    QStyle::SFlags flags = QStyle::Style_Default;

    if ( orientation() == Horizontal )
	flags |= QStyle::Style_Horizontal;

    style().drawPrimitive( QStyle::PE_DockWindowSeparator, &p, rect(),
			   colorGroup(), flags );
}



QSeparatorAction::QSeparatorAction( QObject *parent )
    : QAction( parent, "qt_designer_separator" ), wid( 0 )
{
}

bool QSeparatorAction::addTo( QWidget *w )
{
    if ( ::qt_cast<QToolBar*>(w) ) {
	QToolBar *tb = (QToolBar*)w;
	wid = new QDesignerToolBarSeparator( tb->orientation(), tb );
	return TRUE;
    } else if ( ::qt_cast<QPopupMenu*>(w) ) {
	idx = ( (QPopupMenu*)w )->count();
	( (QPopupMenu*)w )->insertSeparator( idx );
	return TRUE;
    }
    return FALSE;
}

bool QSeparatorAction::removeFrom( QWidget *w )
{
    if ( ::qt_cast<QToolBar*>(w) ) {
	delete wid;
	return TRUE;
    } else if ( ::qt_cast<QPopupMenu*>(w) ) {
	( (QPopupMenu*)w )->removeItemAt( idx );
	return TRUE;
    }
    return FALSE;
}

QWidget *QSeparatorAction::widget() const
{
    return wid;
}



QDesignerToolBar::QDesignerToolBar( QMainWindow *mw )
    : QToolBar( mw ), lastIndicatorPos( -1, -1 )
{
    insertAnchor = 0;
    afterAnchor = TRUE;
    setAcceptDrops( TRUE );
    MetaDataBase::addEntry( this );
    lastIndicatorPos = QPoint( -1, -1 );
    indicator = new QDesignerIndicatorWidget( this );
    indicator->hide();
    installEventFilter( this );
    widgetInserting = FALSE;
    findFormWindow();
    mw->setDockEnabled( DockTornOff, FALSE );
}

QDesignerToolBar::QDesignerToolBar( QMainWindow *mw, Dock dock )
    : QToolBar( QString::null, mw, dock), lastIndicatorPos( -1, -1 )
{
    insertAnchor = 0;
    afterAnchor = TRUE;
    setAcceptDrops( TRUE );
    indicator = new QDesignerIndicatorWidget( this );
    indicator->hide();
    MetaDataBase::addEntry( this );
    installEventFilter( this );
    widgetInserting = FALSE;
    findFormWindow();
    mw->setDockEnabled( DockTornOff, FALSE );
}

void QDesignerToolBar::findFormWindow()
{
    QWidget *w = this;
    while ( w ) {
	formWindow = ::qt_cast<FormWindow*>(w);
	if ( formWindow )
	    break;
	w = w->parentWidget();
    }
}

void QDesignerToolBar::addAction( QAction *a )
{
    actionList.append( a );
    connect( a, SIGNAL( destroyed() ), this, SLOT( actionRemoved() ) );
    if ( ::qt_cast<QActionGroup*>(a) ) {
	( (QDesignerActionGroup*)a )->widget()->installEventFilter( this );
	actionMap.insert( ( (QDesignerActionGroup*)a )->widget(), a );
    } else if ( ::qt_cast<QSeparatorAction*>(a) ) {
	( (QSeparatorAction*)a )->widget()->installEventFilter( this );
	actionMap.insert( ( (QSeparatorAction*)a )->widget(), a );
    } else {
	( (QDesignerAction*)a )->widget()->installEventFilter( this );
	actionMap.insert( ( (QDesignerAction*)a )->widget(), a );
    }
}

static void fixObject( QObject *&o )
{
    while ( o && o->parent() && !::qt_cast<QDesignerToolBar*>(o->parent()) )
	o = o->parent();
}

bool QDesignerToolBar::eventFilter( QObject *o, QEvent *e )
{
    if ( !o || !e || o->inherits( "QDockWindowHandle" ) || o->inherits( "QDockWindowTitleBar" ) )
	return QToolBar::eventFilter( o, e );

    if ( o == this && e->type() == QEvent::MouseButtonPress &&
	 ( ( QMouseEvent*)e )->button() == LeftButton ) {
	mousePressEvent( (QMouseEvent*)e );
	return TRUE;
    }

    if ( o == this )
	return QToolBar::eventFilter( o, e );

    if ( e->type() == QEvent::MouseButtonPress ) {
	QMouseEvent *ke = (QMouseEvent*)e;
	fixObject( o );
	if ( !o )
	    return FALSE;
	buttonMousePressEvent( ke, o );
	return TRUE;
    } else if(e->type() == QEvent::ContextMenu ) {
	QContextMenuEvent *ce = (QContextMenuEvent*)e;
	fixObject( o );
	if( !o )
	    return FALSE;
	buttonContextMenuEvent( ce, o );
	return TRUE;
    } else if ( e->type() == QEvent::MouseMove ) {
	QMouseEvent *ke = (QMouseEvent*)e;
	fixObject( o );
	if ( !o )
	    return FALSE;
	buttonMouseMoveEvent( ke, o );
	return TRUE;
    } else if ( e->type() == QEvent::MouseButtonRelease ) {
	QMouseEvent *ke = (QMouseEvent*)e;
	fixObject( o );
	if ( !o )
	    return FALSE;
	buttonMouseReleaseEvent( ke, o );
	return TRUE;
    } else if ( e->type() == QEvent::DragEnter ) {
	QDragEnterEvent *de = (QDragEnterEvent*)e;
	if (ActionDrag::canDecode(de))
	    de->accept();
    } else if ( e->type() == QEvent::DragMove ) {
	QDragMoveEvent *de = (QDragMoveEvent*)e;
	if (ActionDrag::canDecode(de))
	    de->accept();
    }

    return QToolBar::eventFilter( o, e );
}

void QDesignerToolBar::paintEvent( QPaintEvent *e )
{
    QToolBar::paintEvent( e );
    if ( e->rect() != rect() )
	return;
    lastIndicatorPos = QPoint( -1, -1 );
}

void QDesignerToolBar::contextMenuEvent( QContextMenuEvent *e )
{
    e->accept();
    QPopupMenu menu( 0 );
    menu.insertItem( tr( "Delete Toolbar" ), 1 );
    int res = menu.exec( e->globalPos() );
    if ( res != -1 ) {
	RemoveToolBarCommand *cmd = new RemoveToolBarCommand( tr( "Delete Toolbar '%1'" ).arg( name() ),
							      formWindow, 0, this );
	formWindow->commandHistory()->addCommand( cmd );
	cmd->execute();
    }
}

void QDesignerToolBar::mousePressEvent( QMouseEvent *e )