DISPLIB::LayoutScene Class Reference

Base QGraphicsScene providing pan, pinch-zoom and swipe gesture handling for sensor-layout scenes. More...

#include <layoutscene.h>

Public Member Functions
	LayoutScene (QGraphicsView *view, QObject *parent=0)

Protected Member Functions
void	wheelEvent (QGraphicsSceneWheelEvent *event)
void	mouseDoubleClickEvent (QGraphicsSceneMouseEvent *mouseEvent)
void	mousePressEvent (QGraphicsSceneMouseEvent *mouseEvent)
void	mouseMoveEvent (QGraphicsSceneMouseEvent *mouseEvent)
void	mouseReleaseEvent (QGraphicsSceneMouseEvent *mouseEvent)
void	keyPressEvent (QKeyEvent *keyEvent)
void	keyReleaseEvent (QKeyEvent *keyEvent)
bool	event (QEvent *event)
bool	gestureEvent (QGestureEvent *event)
void	panTriggered (QPanGesture *)
void	pinchTriggered (QPinchGesture *)
void	swipeTriggered (QSwipeGesture *)
bool	eventFilter (QObject *object, QEvent *event)

Protected Attributes
QGraphicsView *	m_qvView
bool	m_bDragMode
QPointF	m_mousePressPosition

Detailed Description

Base QGraphicsScene providing pan, pinch-zoom and swipe gesture handling for sensor-layout scenes.

Installs gesture recognisers on the active view and translates pan / pinch / swipe events into view-zoom / view-pan operations regardless of input device.

Definition at line 69 of file layoutscene.h.

Inheritance diagram for DISPLIB::LayoutScene:

Constructor & Destructor Documentation

LayoutScene()

LayoutScene::LayoutScene	(	QGraphicsView *	view,
		QObject *	parent = 0 )

Constructs a LayoutScene.

Parameters

[in]	view	Graphics view that displays this scene and is zoomed/panned by it.
[in]	parent	Parent QObject (default 0).

Definition at line 41 of file layoutscene.cpp.

Member Function Documentation

event()

bool LayoutScene::event ( QEvent * event )

protected

reimplemented event function - intercepts touch gestures

Parameters

[in]

event

The incoming event.

Returns

True if the event was a gesture and was handled, otherwise the QGraphicsScene result.

Definition at line 187 of file layoutscene.cpp.

eventFilter()

bool LayoutScene::eventFilter ( QObject * object, QEvent * event )

protected

Installed event filter.

Parameters

[in]	object	the qt object for which the event was intercpeted.
[in]	event	the current event.

Returns

True if a gesture event on the view was handled, false otherwise.

Definition at line 238 of file layoutscene.cpp.

gestureEvent()

bool LayoutScene::gestureEvent ( QGestureEvent * event )

protected

gestureEvent processes gesture events

Parameters

[in]

event

Gesture event whose pan and pinch gestures are dispatched.

Returns

Always true.

Definition at line 205 of file layoutscene.cpp.

keyPressEvent()

void LayoutScene::keyPressEvent ( QKeyEvent * keyEvent )

protected

Reimplemented key press event.

Parameters

[in]

keyEvent

The key event, forwarded to QGraphicsScene.

Definition at line 167 of file layoutscene.cpp.

keyReleaseEvent()

void LayoutScene::keyReleaseEvent ( QKeyEvent * keyEvent )

protected

Reimplemented key release event.

Parameters

[in]

keyEvent

The key event, forwarded to QGraphicsScene.

Definition at line 177 of file layoutscene.cpp.

mouseDoubleClickEvent()

void LayoutScene::mouseDoubleClickEvent ( QGraphicsSceneMouseEvent * mouseEvent )

protected

Reimplemented double mouse press event.

Parameters

[in]

mouseEvent

The mouse event; a left double click fits all items into the view.

Definition at line 74 of file layoutscene.cpp.

mouseMoveEvent()

void LayoutScene::mouseMoveEvent ( QGraphicsSceneMouseEvent * mouseEvent )

protected

Reimplemented double mouse move event.

Parameters

[in]

mouseEvent

The mouse event; pans the view while in drag mode.

Definition at line 112 of file layoutscene.cpp.

mousePressEvent()

void LayoutScene::mousePressEvent ( QGraphicsSceneMouseEvent * mouseEvent )

protected

Reimplemented mouse press event.

Parameters

[in]

mouseEvent

The mouse event; left starts rubber-band selection, right starts panning.

Definition at line 84 of file layoutscene.cpp.

mouseReleaseEvent()

void LayoutScene::mouseReleaseEvent ( QGraphicsSceneMouseEvent * mouseEvent )

protected

Reimplemented double mouse release event.

Parameters

[in]

mouseEvent

The mouse event; ends drag mode.

Definition at line 129 of file layoutscene.cpp.

panTriggered()

void LayoutScene::panTriggered ( QPanGesture * gesture )

protected

pinchTriggered processes pan gesture events

Definition at line 220 of file layoutscene.cpp.

pinchTriggered()

void LayoutScene::pinchTriggered ( QPinchGesture * gesture )

protected

pinchTriggered processes pinch gesture events

Definition at line 230 of file layoutscene.cpp.

swipeTriggered()

void DISPLIB::LayoutScene::swipeTriggered ( QSwipeGesture * )

protected

pinchTriggered processes swipe gesture events

wheelEvent()

void LayoutScene::wheelEvent ( QGraphicsSceneWheelEvent * event )

protected

Reimplemented wheel event.

Parameters

[in]

event

The wheel event; scales the view by 1.15 per step under the mouse.

Definition at line 57 of file layoutscene.cpp.

Member Data Documentation

m_bDragMode

bool DISPLIB::LayoutScene::m_bDragMode

protected

Flag whether the drag mode is activated.

Definition at line 193 of file layoutscene.h.

m_mousePressPosition

QPointF DISPLIB::LayoutScene::m_mousePressPosition

protected

The current mouse press location.

Definition at line 195 of file layoutscene.h.

m_qvView

QGraphicsView* DISPLIB::LayoutScene::m_qvView

protected

The view which visualizes this scene.

Definition at line 190 of file layoutscene.h.

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

• src/libraries/disp/viewers/helpers/layoutscene.h
• src/libraries/disp/viewers/helpers/layoutscene.cpp