Add Qt3 development HEAD version

1 files changed, 516 insertions, 0 deletions

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