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/**************************************************************************
**
** This file is part of Qt Creator
**
** Copyright (c) 2011 Nokia Corporation and/or its subsidiary(-ies).
**
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** No Commercial Usage
**
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
**
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**************************************************************************/
#include "sizehandlerect.h"
#include "widgethostconstants.h"
#include <QtDesigner/QDesignerFormWindowInterface>
#include <QtGui/QMouseEvent>
#include <QtGui/QPainter>
#include <QtGui/QFrame>
#include <QtCore/QDebug>
enum { debugSizeHandle = 0 };
using namespace SharedTools::Internal;
SizeHandleRect::SizeHandleRect(QWidget *parent, Direction d, QWidget *resizable) :
QWidget(parent),
m_dir(d),
m_resizable(resizable),
m_state(SelectionHandleOff)
{
setBackgroundRole(QPalette::Text);
setAutoFillBackground(true);
setFixedSize(SELECTION_HANDLE_SIZE, SELECTION_HANDLE_SIZE);
setMouseTracking(false);
updateCursor();
}
void SizeHandleRect::updateCursor()
{
switch (m_dir) {
case Right:
case RightTop:
setCursor(Qt::SizeHorCursor);
return;
case RightBottom:
setCursor(Qt::SizeFDiagCursor);
return;
case LeftBottom:
case Bottom:
setCursor(Qt::SizeVerCursor);
return;
default:
break;
}
setCursor(Qt::ArrowCursor);
}
void SizeHandleRect::paintEvent(QPaintEvent *)
{
switch (m_state) {
case SelectionHandleOff:
break;
case SelectionHandleInactive: {
QPainter p(this);
p.setPen(Qt::red);
p.drawRect(0, 0, width() - 1, height() - 1);
}
break;
case SelectionHandleActive: {
QPainter p(this);
p.setPen(Qt::blue);
p.drawRect(0, 0, width() - 1, height() - 1);
}
break;
}
}
void SizeHandleRect::mousePressEvent(QMouseEvent *e)
{
e->accept();
if (e->button() != Qt::LeftButton)
return;
m_startSize = m_curSize = m_resizable->size();
m_startPos = m_curPos = m_resizable->mapFromGlobal(e->globalPos());
if (debugSizeHandle)
qDebug() << "SizeHandleRect::mousePressEvent" << m_startSize << m_startPos << m_curPos;
}
void SizeHandleRect::mouseMoveEvent(QMouseEvent *e)
{
if (!(e->buttons() & Qt::LeftButton))
return;
// Try resize with delta against start position.
// We don't take little deltas in consecutive move events as this
// causes the handle and the mouse cursor to become out of sync
// once a min/maxSize limit is hit. When the cursor reenters the valid
// areas, it will now snap to it.
m_curPos = m_resizable->mapFromGlobal(e->globalPos());
QSize delta = QSize(m_curPos.x() - m_startPos.x(), m_curPos.y() - m_startPos.y());
switch (m_dir) {
case Right:
case RightTop: // Only width
delta.setHeight(0);
break;
case RightBottom: // All dimensions
break;
case LeftBottom:
case Bottom: // Only height
delta.setWidth(0);
break;
default:
delta = QSize(0, 0);
break;
}
if (delta != QSize(0, 0))
tryResize(delta);
}
void SizeHandleRect::mouseReleaseEvent(QMouseEvent *e)
{
if (e->button() != Qt::LeftButton)
return;
e->accept();
if (m_startSize != m_curSize) {
const QRect startRect = QRect(0, 0, m_startPos.x(), m_startPos.y());
const QRect newRect = QRect(0, 0, m_curPos.x(), m_curPos.y());
if (debugSizeHandle)
qDebug() << "SizeHandleRect::mouseReleaseEvent" << startRect << newRect;
emit mouseButtonReleased(startRect, newRect);
}
}
void SizeHandleRect::tryResize(const QSize &delta)
{
// Try resize with delta against start position
QSize newSize = m_startSize + delta;
newSize = newSize.expandedTo(m_resizable->minimumSizeHint());
newSize = newSize.expandedTo(m_resizable->minimumSize());
newSize = newSize.boundedTo(m_resizable->maximumSize());
if (newSize == m_resizable->size())
return;
if (debugSizeHandle)
qDebug() << "SizeHandleRect::tryResize by (" << m_startSize << '+' << delta << ')' << newSize;
m_resizable->resize(newSize);
m_curSize = m_resizable->size();
}
void SizeHandleRect::setState(SelectionHandleState st)
{
if (st == m_state)
return;
switch (st) {
case SelectionHandleOff:
hide();
break;
case SelectionHandleInactive:
case SelectionHandleActive:
show();
raise();
break;
}
m_state = st;
}
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