MaskGraphicsView Class Reference

Graphics view for MaskEditorCanvas. More...

Inheritance diagram for MaskGraphicsView:

Collaboration diagram for MaskGraphicsView:

Public Slots
void	onResetViewRequest ()
	Reset given view to original zoom state. Also asks graphics scene to do the same with color map. More...
void	updateSize (const QSize &newSize)

Signals
void	changeActivityRequest (MaskEditorFlags::Activity)
void	deleteSelectedRequest ()

Public Member Functions
	MaskGraphicsView (QGraphicsScene *scene, QWidget *parent=0)
QSize	minimumSizeHint () const
QSize	sizeHint () const

Protected Member Functions
void	keyPressEvent (QKeyEvent *event)
void	keyReleaseEvent (QKeyEvent *event)
void	resizeEvent (QResizeEvent *event)
	On resize event changes scene size and MaskGraphicsProxy so they would get the size of viewport. More...
void	wheelEvent (QWheelEvent *event)

Private Member Functions
void	cancelCurrentDrawing ()
void	decreazeZoomValue ()
void	increazeZoomValue ()
bool	isControlButtonIsPressed (QWheelEvent *event)
void	setZoomValue (double zoom_value)

Private Attributes
double	m_current_zoom_value

Detailed Description

Graphics view for MaskEditorCanvas.

Definition at line 26 of file MaskGraphicsView.h.

Constructor & Destructor Documentation

MaskGraphicsView()

MaskGraphicsView::MaskGraphicsView	(	QGraphicsScene *	scene,
		QWidget *	parent = 0
	)

Definition at line 29 of file MaskGraphicsView.cpp.

    : QGraphicsView(scene, parent), m_current_zoom_value(1.0)
{
    setObjectName("MaskGraphicsView");
    setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
    setRenderHints(QPainter::Antialiasing | QPainter::TextAntialiasing);
    setStyleSheet("QGraphicsView { border-style: none; }");
    setMouseTracking(true);
}

Member Function Documentation

cancelCurrentDrawing()

void MaskGraphicsView::cancelCurrentDrawing ( )

private

Definition at line 126 of file MaskGraphicsView.cpp.

{
    MaskGraphicsScene* maskScene = dynamic_cast<MaskGraphicsScene*>(scene());
    maskScene->cancelCurrentDrawing();
}

References MaskGraphicsScene::cancelCurrentDrawing().

Referenced by keyPressEvent().

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changeActivityRequest

void MaskGraphicsView::changeActivityRequest ( MaskEditorFlags::Activity  )

signal

Referenced by MaskEditorCanvas::MaskEditorCanvas(), ProjectionsEditorCanvas::ProjectionsEditorCanvas(), keyPressEvent(), and keyReleaseEvent().

decreazeZoomValue()

void MaskGraphicsView::decreazeZoomValue ( )

private

Definition at line 143 of file MaskGraphicsView.cpp.

{
    double zoom_value = m_current_zoom_value - zoom_step;
    if (zoom_value < min_zoom_value)
        zoom_value = min_zoom_value;
    setZoomValue(zoom_value);
}

References m_current_zoom_value, and setZoomValue().

Referenced by wheelEvent().

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deleteSelectedRequest

void MaskGraphicsView::deleteSelectedRequest ( )

signal

Referenced by MaskEditorCanvas::MaskEditorCanvas(), ProjectionsEditorCanvas::ProjectionsEditorCanvas(), and keyPressEvent().

increazeZoomValue()

void MaskGraphicsView::increazeZoomValue ( )

private

Definition at line 151 of file MaskGraphicsView.cpp.

{
    double zoom_value = m_current_zoom_value + zoom_step;
    if (zoom_value > max_zoom_value)
        zoom_value = max_zoom_value;
    setZoomValue(zoom_value);
}

References m_current_zoom_value, and setZoomValue().

Referenced by wheelEvent().

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isControlButtonIsPressed()

bool MaskGraphicsView::isControlButtonIsPressed ( QWheelEvent *  event )

private

Definition at line 118 of file MaskGraphicsView.cpp.

{
    if (event->modifiers().testFlag(Qt::ControlModifier)) {
        return true;
    }
    return false;
}

Referenced by wheelEvent().

keyPressEvent()

void MaskGraphicsView::keyPressEvent ( QKeyEvent *  event )

protected

Definition at line 81 of file MaskGraphicsView.cpp.

{
    switch (event->key()) {
    case Qt::Key_Left:
        break;
    case Qt::Key_Space:
        if (!event->isAutoRepeat()) {
            emit changeActivityRequest(MaskEditorFlags::PAN_ZOOM_MODE);
        }
        break;
    case Qt::Key_Escape:
        cancelCurrentDrawing();
        break;
    case Qt::Key_Delete:
        emit deleteSelectedRequest();
        break;
    case Qt::Key_Backspace:
        emit deleteSelectedRequest();
        break;
    default:
        QWidget::keyPressEvent(event);
    }
}

References cancelCurrentDrawing(), changeActivityRequest(), deleteSelectedRequest(), and MaskEditorFlags::PAN_ZOOM_MODE.

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keyReleaseEvent()

void MaskGraphicsView::keyReleaseEvent ( QKeyEvent *  event )

protected

Definition at line 105 of file MaskGraphicsView.cpp.

{
    switch (event->key()) {
    case Qt::Key_Space:
        if (!event->isAutoRepeat()) {
            emit changeActivityRequest(MaskEditorFlags::PREVIOUS_MODE);
        }
        break;
    default:
        QWidget::keyPressEvent(event);
    }
}

References changeActivityRequest(), and MaskEditorFlags::PREVIOUS_MODE.

minimumSizeHint()

QSize MaskGraphicsView::minimumSizeHint ( ) const

inline

Definition at line 31 of file MaskGraphicsView.h.

{ return QSize(128, 128); }

onResetViewRequest

void MaskGraphicsView::onResetViewRequest ( )

slot

Reset given view to original zoom state. Also asks graphics scene to do the same with color map.

Definition at line 40 of file MaskGraphicsView.cpp.

{
    setZoomValue(1.0);
}

References setZoomValue().

Referenced by ProjectionsEditorCanvas::onResetViewRequest(), and MaskEditorCanvas::onResetViewRequest().

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resizeEvent()

void MaskGraphicsView::resizeEvent ( QResizeEvent *  event )

protected

On resize event changes scene size and MaskGraphicsProxy so they would get the size of viewport.

Definition at line 68 of file MaskGraphicsView.cpp.

{
    QWidget::resizeEvent(event);
    updateSize(event->size());
    //    for(QGraphicsItem *graphicsItem : scene()->items()) {
    //        if(MaskGraphicsProxy *proxy = dynamic_cast<MaskGraphicsProxy *>(graphicsItem)) {
    //            proxy->resize(event->size());
    //            scene()->setSceneRect(0,0,event->size().width(),event->size().height());
    //            proxy->setPos(0,0);
    //        }
    //    }
}

References updateSize().

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setZoomValue()

void MaskGraphicsView::setZoomValue ( double  zoom_value )

private

Definition at line 132 of file MaskGraphicsView.cpp.

{
    if (zoom_value == m_current_zoom_value)
        return;
    const QTransform oldMatrix = transform();
    resetTransform();
    translate(oldMatrix.dx(), oldMatrix.dy());
    scale(zoom_value, zoom_value);
    m_current_zoom_value = zoom_value;
}

References m_current_zoom_value.

Referenced by decreazeZoomValue(), increazeZoomValue(), and onResetViewRequest().

sizeHint()

QSize MaskGraphicsView::sizeHint ( ) const

inline

Definition at line 30 of file MaskGraphicsView.h.

{ return QSize(512, 512); }

updateSize

void MaskGraphicsView::updateSize ( const QSize &  newSize )

slot

Definition at line 159 of file MaskGraphicsView.cpp.

{
    for (QGraphicsItem* graphicsItem : scene()->items()) {
        if (MaskGraphicsProxy* proxy = dynamic_cast<MaskGraphicsProxy*>(graphicsItem)) {
            proxy->resize(newSize);
            scene()->setSceneRect(0, 0, newSize.width(), newSize.height());
            proxy->setPos(0, 0);
        }
    }
}

Referenced by resizeEvent(), ProjectionsEditorCanvas::setContext(), and MaskEditorCanvas::setMaskContext().

wheelEvent()

void MaskGraphicsView::wheelEvent ( QWheelEvent *  event )

protected

Definition at line 45 of file MaskGraphicsView.cpp.

{
    // hold control button
    if (isControlButtonIsPressed(event)) {
#if QT_VERSION >= QT_VERSION_CHECK(5, 15, 0)
        centerOn(mapToScene(event->position().toPoint()));
#else
        centerOn(mapToScene(event->pos())); // TODO upon Qt5.14: pos() -> position().toPoint()
#endif
        if (event->angleDelta().y() > 0) {
            // Zoom in
            increazeZoomValue();
        } else {
            // Zooming out
            if (horizontalScrollBar()->isVisible() || verticalScrollBar()->isVisible())
                decreazeZoomValue();
        }
    } else {
        QGraphicsView::wheelEvent(event);
    }
}

References decreazeZoomValue(), increazeZoomValue(), and isControlButtonIsPressed().

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Member Data Documentation

m_current_zoom_value

double MaskGraphicsView::m_current_zoom_value

private

Definition at line 56 of file MaskGraphicsView.h.

Referenced by decreazeZoomValue(), increazeZoomValue(), and setZoomValue().

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The documentation for this class was generated from the following files:

• /home/www/ba/GUI/coregui/Views/MaskWidgets/MaskGraphicsView.h
• /home/www/ba/GUI/coregui/Views/MaskWidgets/MaskGraphicsView.cpp