DesignerView Class Reference

The DesignerView class provides widget for displaying the contents of DesignerScene. More...

Inheritance diagram for DesignerView:

Collaboration diagram for DesignerView:

Public Types
enum	ESelectionModes { SIMPLE_SELECTION , RUBBER_SELECTION , HAND_DRAG }

Public Slots
void	deleteSelectedItems ()
void	onCenterView ()
void	onChangeScale (double)
void	onSelectionMode (int)

Signals
void	selectionModeChanged (int)

Public Member Functions
	DesignerView (QGraphicsScene *scene, QWidget *parent=0)
virtual	~DesignerView ()
int	getSelectionMode () const

Protected Member Functions
void	keyPressEvent (QKeyEvent *event)
void	keyReleaseEvent (QKeyEvent *event)

Detailed Description

The DesignerView class provides widget for displaying the contents of DesignerScene.

Belongs to SampleDesigner Currently contains logic for zooming, deleting objects

Definition at line 30 of file DesignerView.h.

Member Enumeration Documentation

ESelectionModes

enum DesignerView::ESelectionModes

Enumerator
SIMPLE_SELECTION
RUBBER_SELECTION
HAND_DRAG

Definition at line 37 of file DesignerView.h.

{ SIMPLE_SELECTION, RUBBER_SELECTION, HAND_DRAG };

Constructor & Destructor Documentation

DesignerView()

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

explicit

Definition at line 27 of file DesignerView.cpp.

                                                                 : QGraphicsView(scene, parent)
{
    setAcceptDrops(true);
    setRenderHint(QPainter::Antialiasing);
    setMouseTracking(true);
    setDragMode(QGraphicsView::RubberBandDrag);
}

~DesignerView()

virtual DesignerView::~DesignerView ( )

inlinevirtual

Definition at line 35 of file DesignerView.h.

{}

Member Function Documentation

deleteSelectedItems

void DesignerView::deleteSelectedItems ( )

slot

Definition at line 85 of file DesignerView.cpp.

{
    DesignerScene* designerScene = dynamic_cast<DesignerScene*>(scene());
    ASSERT(designerScene);
    designerScene->deleteSelectedItems();
}

References ASSERT, and DesignerScene::deleteSelectedItems().

Referenced by SampleView::connectSignals(), and keyPressEvent().

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getSelectionMode()

int DesignerView::getSelectionMode

(

)

const

Definition at line 35 of file DesignerView.cpp.

{
    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.");
    }
}

References HAND_DRAG, RUBBER_SELECTION, and SIMPLE_SELECTION.

Referenced by keyPressEvent(), and keyReleaseEvent().

keyPressEvent()

void DesignerView::keyPressEvent ( QKeyEvent *  event )

protected

Definition at line 92 of file DesignerView.cpp.

{
    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);
    }
}

References deleteSelectedItems(), getSelectionMode(), HAND_DRAG, and onSelectionMode().

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keyReleaseEvent()

void DesignerView::keyReleaseEvent ( QKeyEvent *  event )

protected

Definition at line 113 of file DesignerView.cpp.

{
    switch (event->key()) {
    case Qt::Key_Space:
 
        if (getSelectionMode() != RUBBER_SELECTION && !event->isAutoRepeat()) {
            onSelectionMode(RUBBER_SELECTION); // space released
        }
        break;
    default:
        QWidget::keyPressEvent(event);
    }
}

References getSelectionMode(), onSelectionMode(), and RUBBER_SELECTION.

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onCenterView

void DesignerView::onCenterView ( )

slot

Definition at line 71 of file DesignerView.cpp.

{
    // fitInView(scene()->itemsBoundingRect() ,Qt::KeepAspectRatio);
    centerOn(scene()->itemsBoundingRect().center());
}

Referenced by SampleView::connectSignals().

onChangeScale

void DesignerView::onChangeScale ( double  new_scale )

slot

Definition at line 77 of file DesignerView.cpp.

{
    QTransform oldMatrix = transform();
    resetTransform();
    translate(oldMatrix.dx(), oldMatrix.dy());
    scale(new_scale, new_scale);
}

Referenced by SampleView::connectSignals().

onSelectionMode

void DesignerView::onSelectionMode ( int  mode )

slot

Definition at line 48 of file DesignerView.cpp.

{
    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;
    }
}

References HAND_DRAG, RUBBER_SELECTION, selectionModeChanged(), and SIMPLE_SELECTION.

Referenced by SampleView::connectSignals(), keyPressEvent(), and keyReleaseEvent().

selectionModeChanged

void DesignerView::selectionModeChanged ( int  )

signal

Referenced by SampleView::connectSignals(), and onSelectionMode().

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

• /home/www/ba/GUI/coregui/Views/SampleDesigner/DesignerView.h
• /home/www/ba/GUI/coregui/Views/SampleDesigner/DesignerView.cpp