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517 lines
14 KiB
517 lines
14 KiB
/****************************************************************************
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**
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** Implementation of the QWidgetResizeHandler class
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**
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** Created : 001010
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**
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** Copyright (C) 1992-2008 Trolltech ASA. All rights reserved.
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**
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** This file is part of the workspace module of the Qt GUI Toolkit.
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**
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** This file may be used under the terms of the GNU General
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** Public License versions 2.0 or 3.0 as published by the Free
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** Software Foundation and appearing in the files LICENSE.GPL2
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** and LICENSE.GPL3 included in the packaging of this file.
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** Alternatively you may (at your option) use any later version
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** of the GNU General Public License if such license has been
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** publicly approved by Trolltech ASA (or its successors, if any)
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** and the KDE Free Qt Foundation.
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**
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** Please review the following information to ensure GNU General
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** Public Licensing requirements will be met:
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** http://trolltech.com/products/qt/licenses/licensing/opensource/.
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** If you are unsure which license is appropriate for your use, please
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** review the following information:
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** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
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** or contact the sales department at sales@trolltech.com.
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**
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** This file may be used under the terms of the Q Public License as
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** defined by Trolltech ASA and appearing in the file LICENSE.QPL
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** included in the packaging of this file. Licensees holding valid Qt
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** Commercial licenses may use this file in accordance with the Qt
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** Commercial License Agreement provided with the Software.
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**
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** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
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** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
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** herein.
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**
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**********************************************************************/
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#include "qwidgetresizehandler_p.h"
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#ifndef QT_NO_RESIZEHANDLER
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#include "qframe.h"
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#include "qapplication.h"
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#include "qcursor.h"
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#include "qsizegrip.h"
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#if defined(Q_WS_WIN)
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#include "qt_windows.h"
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#endif
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#define RANGE 4
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static bool resizeHorizontalDirectionFixed = FALSE;
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static bool resizeVerticalDirectionFixed = FALSE;
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QWidgetResizeHandler::QWidgetResizeHandler( QWidget *parent, QWidget *cw, const char *name )
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: QObject( parent, name ), widget( parent ), childWidget( cw ? cw : parent ),
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extrahei( 0 ), buttonDown( FALSE ), moveResizeMode( FALSE ), sizeprotect( TRUE ), moving( TRUE )
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{
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mode = Nowhere;
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widget->setMouseTracking( TRUE );
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QFrame *frame = ::qt_cast<QFrame*>(widget);
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range = frame ? frame->frameWidth() : RANGE;
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range = QMAX( RANGE, range );
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activeForMove = activeForResize = TRUE;
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qApp->installEventFilter( this );
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}
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void QWidgetResizeHandler::setActive( Action ac, bool b )
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{
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if ( ac & Move )
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activeForMove = b;
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if ( ac & Resize )
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activeForResize = b;
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if ( !isActive() )
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setMouseCursor( Nowhere );
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}
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bool QWidgetResizeHandler::isActive( Action ac ) const
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{
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bool b = FALSE;
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if ( ac & Move ) b = activeForMove;
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if ( ac & Resize ) b |= activeForResize;
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return b;
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}
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static QWidget *childOf( QWidget *w, QWidget *child )
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{
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while ( child ) {
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if ( child == w )
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return child;
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if ( child->isTopLevel() )
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break;
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child = child->parentWidget();
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}
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return 0;
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}
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bool QWidgetResizeHandler::eventFilter( QObject *o, QEvent *ee )
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{
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if ( !isActive() || !o->isWidgetType() || !ee->spontaneous())
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return FALSE;
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if ( ee->type() != QEvent::MouseButtonPress &&
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ee->type() != QEvent::MouseButtonRelease &&
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ee->type() != QEvent::MouseMove &&
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ee->type() != QEvent::KeyPress &&
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ee->type() != QEvent::AccelOverride )
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return FALSE;
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QWidget *w = childOf( widget, (QWidget*)o );
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if ( !w
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#ifndef QT_NO_SIZEGRIP
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|| ::qt_cast<QSizeGrip*>(o)
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#endif
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|| qApp->activePopupWidget() ) {
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if ( buttonDown && ee->type() == QEvent::MouseButtonRelease )
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buttonDown = FALSE;
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return FALSE;
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}
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QMouseEvent *e = (QMouseEvent*)ee;
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switch ( e->type() ) {
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case QEvent::MouseButtonPress: {
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if ( w->isMaximized() )
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break;
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if ( !widget->rect().contains( widget->mapFromGlobal( e->globalPos() ) ) )
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return FALSE;
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if ( e->button() == LeftButton ) {
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emit activate();
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bool me = isMovingEnabled();
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setMovingEnabled( me && o == widget );
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mouseMoveEvent( e );
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setMovingEnabled( me );
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buttonDown = TRUE;
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moveOffset = widget->mapFromGlobal( e->globalPos() );
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invertedMoveOffset = widget->rect().bottomRight() - moveOffset;
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}
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} break;
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case QEvent::MouseButtonRelease:
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if ( w->isMaximized() )
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break;
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if ( e->button() == LeftButton ) {
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moveResizeMode = FALSE;
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buttonDown = FALSE;
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widget->releaseMouse();
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widget->releaseKeyboard();
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}
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break;
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case QEvent::MouseMove: {
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if ( w->isMaximized() )
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break;
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bool me = isMovingEnabled();
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setMovingEnabled( me && o == widget );
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mouseMoveEvent( e );
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setMovingEnabled( me );
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if ( buttonDown && mode != Center )
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return TRUE;
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} break;
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case QEvent::KeyPress:
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keyPressEvent( (QKeyEvent*)e );
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break;
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case QEvent::AccelOverride:
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if ( buttonDown ) {
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((QKeyEvent*)ee)->accept();
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return TRUE;
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}
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break;
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default:
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break;
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}
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return FALSE;
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}
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void QWidgetResizeHandler::mouseMoveEvent( QMouseEvent *e )
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{
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QPoint pos = widget->mapFromGlobal( e->globalPos() );
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if ( !moveResizeMode && ( !buttonDown || ( e->state() & LeftButton ) == 0 ) ) {
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if ( pos.y() <= range && pos.x() <= range)
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mode = TopLeft;
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else if ( pos.y() >= widget->height()-range && pos.x() >= widget->width()-range)
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mode = BottomRight;
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else if ( pos.y() >= widget->height()-range && pos.x() <= range)
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mode = BottomLeft;
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else if ( pos.y() <= range && pos.x() >= widget->width()-range)
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mode = TopRight;
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else if ( pos.y() <= range )
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mode = Top;
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else if ( pos.y() >= widget->height()-range )
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mode = Bottom;
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else if ( pos.x() <= range )
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mode = Left;
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else if ( pos.x() >= widget->width()-range )
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mode = Right;
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else
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mode = Center;
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if ( widget->isMinimized() || !isActive(Resize) )
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mode = Center;
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#ifndef QT_NO_CURSOR
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setMouseCursor( mode );
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#endif
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return;
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}
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if ( buttonDown && !isMovingEnabled() && mode == Center && !moveResizeMode )
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return;
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if ( widget->testWState( WState_ConfigPending ) )
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return;
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QPoint globalPos = widget->parentWidget( TRUE ) ?
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widget->parentWidget( TRUE )->mapFromGlobal( e->globalPos() ) : e->globalPos();
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if ( widget->parentWidget( TRUE ) && !widget->parentWidget( TRUE )->rect().contains( globalPos ) ) {
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if ( globalPos.x() < 0 )
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globalPos.rx() = 0;
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if ( globalPos.y() < 0 )
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globalPos.ry() = 0;
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if ( sizeprotect && globalPos.x() > widget->parentWidget()->width() )
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globalPos.rx() = widget->parentWidget()->width();
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if ( sizeprotect && globalPos.y() > widget->parentWidget()->height() )
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globalPos.ry() = widget->parentWidget()->height();
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}
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QPoint p = globalPos + invertedMoveOffset;
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QPoint pp = globalPos - moveOffset;
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int fw = 0;
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int mw = QMAX( childWidget->minimumSizeHint().width(),
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childWidget->minimumWidth() );
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int mh = QMAX( childWidget->minimumSizeHint().height(),
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childWidget->minimumHeight() );
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if ( childWidget != widget ) {
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QFrame *frame = ::qt_cast<QFrame*>(widget);
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if ( frame )
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fw = frame->frameWidth();
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mw += 2 * fw;
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mh += 2 * fw + extrahei;
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}
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QSize mpsize( widget->geometry().right() - pp.x() + 1,
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widget->geometry().bottom() - pp.y() + 1 );
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mpsize = mpsize.expandedTo( widget->minimumSize() ).expandedTo( QSize(mw, mh) );
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QPoint mp( widget->geometry().right() - mpsize.width() + 1,
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widget->geometry().bottom() - mpsize.height() + 1 );
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QRect geom = widget->geometry();
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switch ( mode ) {
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case TopLeft:
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geom = QRect( mp, widget->geometry().bottomRight() ) ;
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break;
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case BottomRight:
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geom = QRect( widget->geometry().topLeft(), p ) ;
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break;
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case BottomLeft:
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geom = QRect( QPoint(mp.x(), widget->geometry().y() ), QPoint( widget->geometry().right(), p.y()) ) ;
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break;
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case TopRight:
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geom = QRect( QPoint( widget->geometry().x(), mp.y() ), QPoint( p.x(), widget->geometry().bottom()) ) ;
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break;
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case Top:
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geom = QRect( QPoint( widget->geometry().left(), mp.y() ), widget->geometry().bottomRight() ) ;
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break;
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case Bottom:
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geom = QRect( widget->geometry().topLeft(), QPoint( widget->geometry().right(), p.y() ) ) ;
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break;
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case Left:
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geom = QRect( QPoint( mp.x(), widget->geometry().top() ), widget->geometry().bottomRight() ) ;
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break;
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case Right:
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geom = QRect( widget->geometry().topLeft(), QPoint( p.x(), widget->geometry().bottom() ) ) ;
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break;
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case Center:
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if ( isMovingEnabled() || moveResizeMode )
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geom.moveTopLeft( pp );
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break;
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default:
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break;
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}
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QSize maxsize( childWidget->maximumSize() );
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if ( childWidget != widget )
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maxsize += QSize( 2 * fw, 2 * fw + extrahei );
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geom = QRect( geom.topLeft(),
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geom.size().expandedTo( widget->minimumSize() )
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.expandedTo( QSize(mw, mh) )
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.boundedTo( maxsize ) );
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if ( geom != widget->geometry() &&
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( widget->isTopLevel() || widget->parentWidget()->rect().intersects( geom ) ) ) {
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if ( widget->isMinimized() )
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widget->move( geom.topLeft() );
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else
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widget->setGeometry( geom );
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}
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#if defined(Q_WS_WIN)
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MSG msg;
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QT_WA( {
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while(PeekMessageW( &msg, widget->winId(), WM_MOUSEMOVE, WM_MOUSEMOVE, PM_REMOVE ))
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;
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} , {
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while(PeekMessageA( &msg, widget->winId(), WM_MOUSEMOVE, WM_MOUSEMOVE, PM_REMOVE ))
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;
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} );
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#endif
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QApplication::syncX();
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}
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void QWidgetResizeHandler::setMouseCursor( MousePosition m )
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{
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#ifndef QT_NO_CURSOR
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switch ( m ) {
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case TopLeft:
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case BottomRight:
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widget->setCursor( sizeFDiagCursor );
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break;
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case BottomLeft:
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case TopRight:
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widget->setCursor( sizeBDiagCursor );
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break;
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case Top:
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case Bottom:
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widget->setCursor( sizeVerCursor );
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break;
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case Left:
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case Right:
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widget->setCursor( sizeHorCursor );
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break;
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default:
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widget->setCursor( arrowCursor );
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break;
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}
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#endif
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}
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void QWidgetResizeHandler::keyPressEvent( QKeyEvent * e )
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{
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if ( !isMove() && !isResize() )
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return;
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bool is_control = e->state() & ControlButton;
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int delta = is_control?1:8;
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QPoint pos = QCursor::pos();
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switch ( e->key() ) {
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case Key_Left:
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pos.rx() -= delta;
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if ( pos.x() <= QApplication::desktop()->geometry().left() ) {
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if ( mode == TopLeft || mode == BottomLeft ) {
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moveOffset.rx() += delta;
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invertedMoveOffset.rx() += delta;
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} else {
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moveOffset.rx() -= delta;
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invertedMoveOffset.rx() -= delta;
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}
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}
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if ( isResize() && !resizeHorizontalDirectionFixed ) {
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resizeHorizontalDirectionFixed = TRUE;
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if ( mode == BottomRight )
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mode = BottomLeft;
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else if ( mode == TopRight )
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mode = TopLeft;
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#ifndef QT_NO_CURSOR
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setMouseCursor( mode );
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widget->grabMouse( widget->cursor() );
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#else
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widget->grabMouse();
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#endif
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}
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break;
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case Key_Right:
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pos.rx() += delta;
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if ( pos.x() >= QApplication::desktop()->geometry().right() ) {
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if ( mode == TopRight || mode == BottomRight ) {
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moveOffset.rx() += delta;
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invertedMoveOffset.rx() += delta;
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} else {
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moveOffset.rx() -= delta;
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invertedMoveOffset.rx() -= delta;
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}
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}
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if ( isResize() && !resizeHorizontalDirectionFixed ) {
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resizeHorizontalDirectionFixed = TRUE;
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if ( mode == BottomLeft )
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mode = BottomRight;
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else if ( mode == TopLeft )
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mode = TopRight;
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#ifndef QT_NO_CURSOR
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setMouseCursor( mode );
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widget->grabMouse( widget->cursor() );
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#else
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widget->grabMouse();
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#endif
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}
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break;
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case Key_Up:
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pos.ry() -= delta;
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if ( pos.y() <= QApplication::desktop()->geometry().top() ) {
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if ( mode == TopLeft || mode == TopRight ) {
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moveOffset.ry() += delta;
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invertedMoveOffset.ry() += delta;
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} else {
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moveOffset.ry() -= delta;
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invertedMoveOffset.ry() -= delta;
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}
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}
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if ( isResize() && !resizeVerticalDirectionFixed ) {
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resizeVerticalDirectionFixed = TRUE;
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if ( mode == BottomLeft )
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mode = TopLeft;
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else if ( mode == BottomRight )
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mode = TopRight;
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#ifndef QT_NO_CURSOR
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setMouseCursor( mode );
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widget->grabMouse( widget->cursor() );
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#else
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widget->grabMouse();
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#endif
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}
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break;
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case Key_Down:
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pos.ry() += delta;
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if ( pos.y() >= QApplication::desktop()->geometry().bottom() ) {
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if ( mode == BottomLeft || mode == BottomRight ) {
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moveOffset.ry() += delta;
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invertedMoveOffset.ry() += delta;
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} else {
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moveOffset.ry() -= delta;
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invertedMoveOffset.ry() -= delta;
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}
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}
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if ( isResize() && !resizeVerticalDirectionFixed ) {
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resizeVerticalDirectionFixed = TRUE;
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if ( mode == TopLeft )
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mode = BottomLeft;
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else if ( mode == TopRight )
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mode = BottomRight;
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#ifndef QT_NO_CURSOR
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setMouseCursor( mode );
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widget->grabMouse( widget->cursor() );
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#else
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widget->grabMouse();
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#endif
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}
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break;
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case Key_Space:
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case Key_Return:
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case Key_Enter:
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case Key_Escape:
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moveResizeMode = FALSE;
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widget->releaseMouse();
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widget->releaseKeyboard();
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buttonDown = FALSE;
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break;
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default:
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return;
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}
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QCursor::setPos( pos );
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}
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void QWidgetResizeHandler::doResize()
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{
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if ( !activeForResize )
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return;
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moveResizeMode = TRUE;
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buttonDown = TRUE;
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moveOffset = widget->mapFromGlobal( QCursor::pos() );
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if ( moveOffset.x() < widget->width()/2) {
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if ( moveOffset.y() < widget->height()/2)
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mode = TopLeft;
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else
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mode = BottomLeft;
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} else {
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if ( moveOffset.y() < widget->height()/2)
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mode = TopRight;
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else
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mode = BottomRight;
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}
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invertedMoveOffset = widget->rect().bottomRight() - moveOffset;
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#ifndef QT_NO_CURSOR
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setMouseCursor( mode );
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widget->grabMouse( widget->cursor() );
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#else
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widget->grabMouse();
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#endif
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widget->grabKeyboard();
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resizeHorizontalDirectionFixed = FALSE;
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resizeVerticalDirectionFixed = FALSE;
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}
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void QWidgetResizeHandler::doMove()
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{
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if ( !activeForMove )
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return;
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mode = Center;
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moveResizeMode = TRUE;
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buttonDown = TRUE;
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moveOffset = widget->mapFromGlobal( QCursor::pos() );
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invertedMoveOffset = widget->rect().bottomRight() - moveOffset;
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#ifndef QT_NO_CURSOR
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widget->grabMouse( SizeAllCursor );
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#else
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widget->grabMouse();
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#endif
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widget->grabKeyboard();
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}
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#endif //QT_NO_RESIZEHANDLER
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