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/* dataItemView.C
*
* Copyright (C) 2009 Marcel Schumann
*
* This file is part of QuEasy -- A Toolbox for Automated QSAR Model
* Construction and Validation.
* QuEasy is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or (at
* your option) any later version.
*
* QuEasy is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include <dataItemView.h>
#include <edge.h>
#include <dataItem.h>
#include <mainWindow.h>
#include <QtGui/QWheelEvent>
#include <QtGui/QMenu>
#include <cmath>
namespace BALL
{
namespace VIEW
{
DataItemView::DataItemView(DataItemScene* scene, MainWindow* mw):
timer_id_(0)
{
setScene(scene);
data_scene = scene;
setRenderHint(QPainter::Antialiasing);
setResizeAnchor(AnchorUnderMouse);
setFocusPolicy(Qt::ClickFocus);
setAlignment(Qt::AlignLeft | Qt::AlignTop);
scene->setItemIndexMethod(QGraphicsScene::NoIndex);
scene->setMainWindow(mw);
scene->view = this;
setAcceptDrops(true);
setInteractive (true);
}
void DataItemView::wheelEvent(QWheelEvent* event)
{
if (name == "view")
{
centerOn(event->x(),event->y());
scaleView(pow((double)2, -event->delta() / 240.0));
}
}
void DataItemView::scaleView(qreal scaleFactor)
{
qreal factor = matrix().scale(scaleFactor, scaleFactor).mapRect(QRectF(0, 0, 1, 1)).width();
if (factor < 0.07 || factor > 100)
{
return;
}
scale(scaleFactor, scaleFactor);
}
void DataItemView::keyPressEvent(QKeyEvent *event)
{
DataItem* item = static_cast<DataItem*>(scene()->focusItem());
if (!item)
{
return;
}
switch (event->key())
{
case Qt::Key_Up:
item->moveBy(0, -10);
break;
case Qt::Key_Down:
item->moveBy(0, 10);
break;
case Qt::Key_Left:
item->moveBy(-10, 0);
break;
case Qt::Key_Right:
item->moveBy(10, 0);
break;
default:
QGraphicsView::keyPressEvent(event);
}
}
}
}
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