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// ************************************************************************************************
//
// BornAgain: simulate and fit reflection and scattering
//
//! @file GUI/coregui/Views/SampleDesigner/DesignerView.cpp
//! @brief Implements class DesignerView
//!
//! @homepage http://www.bornagainproject.org
//! @license GNU General Public License v3 or higher (see COPYING)
//! @copyright Forschungszentrum Jülich GmbH 2018
//! @authors Scientific Computing Group at MLZ (see CITATION, AUTHORS)
//
// ************************************************************************************************
#include "GUI/coregui/Views/SampleDesigner/DesignerView.h"
#include "Base/Utils/Assert.h"
#include "GUI/coregui/Views/SampleDesigner/DesignerMimeData.h"
#include "GUI/coregui/Views/SampleDesigner/DesignerScene.h"
#include "GUI/coregui/utils/GUIHelpers.h"
#include <QDragEnterEvent>
#include <QGraphicsScene>
#include <QGraphicsView>
#include <QMimeData>
#include <QShortcut>
#include <QVBoxLayout>
DesignerView::DesignerView(QGraphicsScene* scene, QWidget* parent) : QGraphicsView(scene, parent)
{
setAcceptDrops(true);
setRenderHint(QPainter::Antialiasing);
setMouseTracking(true);
setDragMode(QGraphicsView::RubberBandDrag);
}
int DesignerView::getSelectionMode() const
{
if (dragMode() == QGraphicsView::NoDrag) {
return SIMPLE_SELECTION;
} else if (dragMode() == QGraphicsView::RubberBandDrag) {
return RUBBER_SELECTION;
} else if (dragMode() == QGraphicsView::ScrollHandDrag) {
return HAND_DRAG;
} else {
throw GUIHelpers::Error("DesignerView::getSelectionMode() -> Error.");
}
}
void DesignerView::onSelectionMode(int mode)
{
switch (mode) {
case SIMPLE_SELECTION:
setDragMode(QGraphicsView::NoDrag);
setInteractive(true);
emit selectionModeChanged(SIMPLE_SELECTION);
break;
case RUBBER_SELECTION:
setDragMode(QGraphicsView::RubberBandDrag);
setInteractive(true);
emit selectionModeChanged(RUBBER_SELECTION);
break;
case HAND_DRAG:
setDragMode(QGraphicsView::ScrollHandDrag);
setInteractive(false);
emit selectionModeChanged(HAND_DRAG);
break;
default:
break;
}
}
void DesignerView::onCenterView()
{
// fitInView(scene()->itemsBoundingRect() ,Qt::KeepAspectRatio);
centerOn(scene()->itemsBoundingRect().center());
}
void DesignerView::onChangeScale(double new_scale)
{
QTransform oldMatrix = transform();
resetTransform();
translate(oldMatrix.dx(), oldMatrix.dy());
scale(new_scale, new_scale);
}
void DesignerView::deleteSelectedItems()
{
DesignerScene* designerScene = dynamic_cast<DesignerScene*>(scene());
ASSERT(designerScene);
designerScene->deleteSelectedItems();
}
void DesignerView::keyPressEvent(QKeyEvent* event)
{
switch (event->key()) {
case Qt::Key_Left:
break;
case Qt::Key_Space:
if (getSelectionMode() != HAND_DRAG && !event->isAutoRepeat()) {
onSelectionMode(HAND_DRAG);
}
break;
case Qt::Key_Delete:
deleteSelectedItems();
break;
case Qt::Key_Backspace:
deleteSelectedItems();
break;
default:
QWidget::keyPressEvent(event);
}
}
void DesignerView::keyReleaseEvent(QKeyEvent* event)
{
switch (event->key()) {
case Qt::Key_Space:
if (getSelectionMode() != RUBBER_SELECTION && !event->isAutoRepeat()) {
onSelectionMode(RUBBER_SELECTION); // space released
}
break;
default:
QWidget::keyPressEvent(event);
}
}
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