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/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of Qt Creator.
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** 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, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
****************************************************************************/
#include "formeditorgraphicsview.h"
#include <QWheelEvent>
#include <QApplication>
#include <QDebug>
#include <qmlanchors.h>
namespace QmlDesigner {
FormEditorGraphicsView::FormEditorGraphicsView(QWidget *parent) :
QGraphicsView(parent)
{
setTransformationAnchor(QGraphicsView::AnchorUnderMouse);
setResizeAnchor(QGraphicsView::AnchorViewCenter);
setAlignment(Qt::AlignCenter);
setCacheMode(QGraphicsView::CacheNone);
setViewportUpdateMode(QGraphicsView::MinimalViewportUpdate);
setOptimizationFlags(QGraphicsView::DontSavePainterState);
// setViewportUpdateMode(QGraphicsView::NoViewportUpdate);
setRenderHint(QPainter::Antialiasing, false);
setFrameShape(QFrame::NoFrame);
setAutoFillBackground(true);
setBackgroundRole(QPalette::Window);
const int checkerbordSize= 20;
QPixmap tilePixmap(checkerbordSize * 2, checkerbordSize * 2);
tilePixmap.fill(Qt::white);
QPainter tilePainter(&tilePixmap);
QColor color(220, 220, 220);
tilePainter.fillRect(0, 0, checkerbordSize, checkerbordSize, color);
tilePainter.fillRect(checkerbordSize, checkerbordSize, checkerbordSize, checkerbordSize, color);
tilePainter.end();
setBackgroundBrush(tilePixmap);
viewport()->setMouseTracking(true);
}
void FormEditorGraphicsView::wheelEvent(QWheelEvent *event)
{
if (event->modifiers().testFlag(Qt::ControlModifier)) {
event->ignore();
} else {
QGraphicsView::wheelEvent(event);
}
}
void FormEditorGraphicsView::setRootItemRect(const QRectF &rect)
{
m_rootItemRect = rect;
viewport()->update();
}
QRectF FormEditorGraphicsView::rootItemRect() const
{
return m_rootItemRect;
}
void FormEditorGraphicsView::drawBackground(QPainter *painter, const QRectF &rectangle)
{
painter->save();
painter->setBrushOrigin(0, 0);
painter->fillRect(rectangle.intersected(rootItemRect()), backgroundBrush());
// paint rect around editable area
painter->setPen(Qt::black);
painter->drawRect( rootItemRect());
painter->restore();
}
} // namespace QmlDesigner
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