This class extends the basic functionality of QGraphicsView to allow comfortable panning and zooming. More...

#include <WQtNetworkEditorView.h>

Inheritance diagram for WQtNetworkEditorView:

Collaboration diagram for WQtNetworkEditorView:

Signals
void	loadAction ()
	Emitted whenever the user caused a load event. More...

void	dragDrop (QDropEvent *event)
	Emitted whenever the user drops something into the widget. More...

Public Member Functions
	WQtNetworkEditorView (QWidget *parent=NULL)
	Constructs empty view. More...

void	focusOn (QGraphicsItem *item)
	The Item to focus on. More...

void	ensureVisibleSmooth (QGraphicsItem *item, int xmargin=50, int ymargin=50)
	Improved version of QGraphicsView::ensureVisible for smooth scrolling. More...

void	setGlobalAddMenu (QMenu *menu)
	Set the given menu as new global add-modules menu. More...

Protected Member Functions
virtual void	mouseDoubleClickEvent (QMouseEvent *event)
	Double clicked into the view. More...

virtual void	mousePressEvent (QMouseEvent *event)
	Mouse button pressed. More...

virtual void	mouseReleaseEvent (QMouseEvent *event)
	Mouse button released. More...

virtual void	mouseMoveEvent (QMouseEvent *event)
	Mouse moved. More...

virtual void	wheelEvent (QWheelEvent *event)
	Mouse wheel used. More...

virtual void	resizeEvent (QResizeEvent *event)
	View resized. More...

void	keyPressEvent (QKeyEvent *event)
	Key pressed. More...

void	leaveEvent (QEvent *event)
	Mouse leaves the widget. More...

virtual void	dropEvent (QDropEvent *event)
	Handles the drop event for a tree item. More...

void	moveBy (const QPointF &delta)
	Move scene in the view by delta units. More...

void	moveTo (const QPointF &target)
	Move scrollarea to absolute position. More...

Private Slots
void	autoPanTick (qreal value)
	Called every tick of the auto pan timer. More...

Private Attributes
QPoint	m_lastPanPoint
	To keep track of mouse movement, cache last known mouse event point. More...

bool	m_panning
	If true, we are in pan mode. More...

QMenu *	m_addMenu
	The menu containing the add actions in m_addModuleActionList. More...

QPoint	m_autoPanTarget
	Auto-pan vector. More...

QPoint	m_autoPanOrig
	Origin of auto-pan movement for proper interpolation. More...

QTimeLine *	m_autoPanTimer
	Auto-pan timer. More...

Detailed Description

This class extends the basic functionality of QGraphicsView to allow comfortable panning and zooming.

Definition at line 36 of file WQtNetworkEditorView.h.

Constructor & Destructor Documentation

◆ WQtNetworkEditorView()

WQtNetworkEditorView::WQtNetworkEditorView ( QWidget * parent = NULL )

explicit

Constructs empty view.

Parameters

parent parent widgets containing the view

Definition at line 40 of file WQtNetworkEditorView.cpp.

References autoPanTick(), m_addMenu, m_autoPanTimer, and m_panning.

Here is the call graph for this function:

Member Function Documentation

◆ autoPanTick

void WQtNetworkEditorView::autoPanTick ( qreal value )

privateslot

Called every tick of the auto pan timer.

Parameters

value

Definition at line 109 of file WQtNetworkEditorView.cpp.

References m_autoPanOrig, m_autoPanTarget, and moveTo().

Referenced by WQtNetworkEditorView().

Here is the call graph for this function:

Here is the caller graph for this function:

◆ dragDrop

void WQtNetworkEditorView::dragDrop ( QDropEvent * event )

signal

Emitted whenever the user drops something into the widget.

Parameters

event event containing further info on the dropped item.

Referenced by dropEvent().

Here is the caller graph for this function:

◆ dropEvent()

void WQtNetworkEditorView::dropEvent ( QDropEvent * event )

protectedvirtual

Handles the drop event for a tree item.

Parameters

event the event.

Definition at line 275 of file WQtNetworkEditorView.cpp.

References dragDrop().

◆ ensureVisibleSmooth()

void WQtNetworkEditorView::ensureVisibleSmooth	(	QGraphicsItem *	item,
		int	xmargin = `50`,
		int	ymargin = `50`
	)

Improved version of QGraphicsView::ensureVisible for smooth scrolling.

Parameters

item	the item to make visible.
xmargin	the margin to ensure between item border and visible scene border (x direction)
ymargin	the margin to ensure between item border and visible scene border (y direction)

Definition at line 69 of file WQtNetworkEditorView.cpp.

References m_autoPanOrig, m_autoPanTarget, and m_autoPanTimer.

Referenced by focusOn(), and WQtNetworkItem::mouseReleaseEvent().

Here is the caller graph for this function:

◆ focusOn()

void WQtNetworkEditorView::focusOn ( QGraphicsItem * item )

The Item to focus on.

Use this instead of QGraphicsView::ensureVisible.

Parameters

item the item.

Definition at line 63 of file WQtNetworkEditorView.cpp.

References ensureVisibleSmooth().

Referenced by WQtNetworkEditor::event(), and WQtNetworkItem::moveFinished().

Here is the call graph for this function:

Here is the caller graph for this function:

◆ keyPressEvent()

void WQtNetworkEditorView::keyPressEvent ( QKeyEvent * event )

protected

Key pressed.

Parameters

event contains event information.

Definition at line 258 of file WQtNetworkEditorView.cpp.

◆ leaveEvent()

void WQtNetworkEditorView::leaveEvent ( QEvent * event )

protected

Mouse leaves the widget.

Parameters

event the event

Definition at line 128 of file WQtNetworkEditorView.cpp.

References m_lastPanPoint.

◆ loadAction

void WQtNetworkEditorView::loadAction ( )

signal

Emitted whenever the user caused a load event.

Referenced by mouseDoubleClickEvent().

Here is the caller graph for this function:

◆ mouseDoubleClickEvent()

void WQtNetworkEditorView::mouseDoubleClickEvent ( QMouseEvent * event )

protectedvirtual

Double clicked into the view.

Parameters

event contains event information.

Definition at line 141 of file WQtNetworkEditorView.cpp.

References loadAction(), and m_addMenu.

◆ mouseMoveEvent()

void WQtNetworkEditorView::mouseMoveEvent ( QMouseEvent * event )

protectedvirtual

Mouse moved.

Parameters

event contains event information.

Definition at line 211 of file WQtNetworkEditorView.cpp.

References m_lastPanPoint, m_panning, and moveBy().

Here is the call graph for this function:

◆ mousePressEvent()

void WQtNetworkEditorView::mousePressEvent ( QMouseEvent * event )

protectedvirtual

Mouse button pressed.

Parameters

event contains event information.

Definition at line 167 of file WQtNetworkEditorView.cpp.

References m_lastPanPoint, and m_panning.

◆ mouseReleaseEvent()

void WQtNetworkEditorView::mouseReleaseEvent ( QMouseEvent * event )

protectedvirtual

Mouse button released.

Parameters

event contains event information.

Definition at line 193 of file WQtNetworkEditorView.cpp.

References m_addMenu, m_lastPanPoint, and m_panning.

◆ moveBy()

void WQtNetworkEditorView::moveBy ( const QPointF & delta )

protected

Move scene in the view by delta units.

Parameters

delta move vector.

Definition at line 114 of file WQtNetworkEditorView.cpp.

Referenced by mouseMoveEvent().

Here is the caller graph for this function:

◆ moveTo()

void WQtNetworkEditorView::moveTo ( const QPointF & target )

protected

Move scrollarea to absolute position.

Parameters

target the new scroll position

Definition at line 122 of file WQtNetworkEditorView.cpp.

Referenced by autoPanTick().

Here is the caller graph for this function:

◆ resizeEvent()

void WQtNetworkEditorView::resizeEvent ( QResizeEvent * event )

protectedvirtual

View resized.

This automatically updates the virtual center for zooming after resize

Parameters

event contains event information.

Definition at line 252 of file WQtNetworkEditorView.cpp.

◆ setGlobalAddMenu()

void WQtNetworkEditorView::setGlobalAddMenu ( QMenu * menu )

Set the given menu as new global add-modules menu.

Can be NULL to disable.

Parameters

menu	the menu to set.

Definition at line 58 of file WQtNetworkEditorView.cpp.

References m_addMenu.

Referenced by WQtControlPanel::createCompatibleButtons().

Here is the caller graph for this function:

◆ wheelEvent()

void WQtNetworkEditorView::wheelEvent ( QWheelEvent * event )

protectedvirtual

Mouse wheel used.

Parameters

event contains event information.

Definition at line 230 of file WQtNetworkEditorView.cpp.

Member Data Documentation

◆ m_addMenu

QMenu* WQtNetworkEditorView::m_addMenu

private

The menu containing the add actions in m_addModuleActionList.

Definition at line 174 of file WQtNetworkEditorView.h.

Referenced by mouseDoubleClickEvent(), mouseReleaseEvent(), setGlobalAddMenu(), and WQtNetworkEditorView().

◆ m_autoPanOrig

QPoint WQtNetworkEditorView::m_autoPanOrig

private

Origin of auto-pan movement for proper interpolation.

Definition at line 184 of file WQtNetworkEditorView.h.

Referenced by autoPanTick(), and ensureVisibleSmooth().

◆ m_autoPanTarget

QPoint WQtNetworkEditorView::m_autoPanTarget

private

Auto-pan vector.

Definition at line 179 of file WQtNetworkEditorView.h.

Referenced by autoPanTick(), and ensureVisibleSmooth().

◆ m_autoPanTimer

QTimeLine* WQtNetworkEditorView::m_autoPanTimer

private

Auto-pan timer.

Definition at line 189 of file WQtNetworkEditorView.h.

Referenced by ensureVisibleSmooth(), and WQtNetworkEditorView().

◆ m_lastPanPoint

QPoint WQtNetworkEditorView::m_lastPanPoint

private

To keep track of mouse movement, cache last known mouse event point.

Definition at line 164 of file WQtNetworkEditorView.h.

Referenced by leaveEvent(), mouseMoveEvent(), mousePressEvent(), and mouseReleaseEvent().

◆ m_panning

bool WQtNetworkEditorView::m_panning

private

If true, we are in pan mode.

Definition at line 169 of file WQtNetworkEditorView.h.

Referenced by mouseMoveEvent(), mousePressEvent(), mouseReleaseEvent(), and WQtNetworkEditorView().

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

Signals

Public Member Functions

Protected Member Functions

Private Slots

Private Attributes

Detailed Description

Constructor & Destructor Documentation

◆ WQtNetworkEditorView()

Member Function Documentation

◆ autoPanTick

◆ dragDrop

◆ dropEvent()

◆ ensureVisibleSmooth()

◆ focusOn()

◆ keyPressEvent()

◆ leaveEvent()

◆ loadAction

◆ mouseDoubleClickEvent()

◆ mouseMoveEvent()

◆ mousePressEvent()

◆ mouseReleaseEvent()

◆ moveBy()

◆ moveTo()

◆ resizeEvent()

◆ setGlobalAddMenu()

◆ wheelEvent()

Member Data Documentation

◆ m_addMenu

◆ m_autoPanOrig

◆ m_autoPanTarget

◆ m_autoPanTimer

◆ m_lastPanPoint

◆ m_panning