This class add event handling to QGraphicsEllipseItem. More...

#include <GraphicsPointEllipse.h>

Inheritance diagram for GraphicsPointEllipse:

Collaboration diagram for GraphicsPointEllipse:

Signals
void	signalPointHoverEnter (QString)
	Signal for geometry window to highlight the current point upon hover enter. More...

void	signalPointHoverLeave (QString)
	Signal for geometry window to unhighlight the current point upon hover leave. More...

Public Member Functions
	GraphicsPointEllipse (GraphicsPoint &graphicsPoint, const QRect &rect)
	Single constructor. More...

QVariant	itemChange (GraphicsItemChange change, const QVariant &value)
	Intercept moves by dragging so moved items can be identified. This replaces unreliable hit tests. More...

virtual void	hoverEnterEvent (QGraphicsSceneHoverEvent *event)
	Accept hover so point can be highlighted when cursor is over it as a guide to user. More...

virtual void	hoverLeaveEvent (QGraphicsSceneHoverEvent *event)
	Unhighlight this point. More...

void	setRadius (int radius)
	Update the radius. More...

void	setShadow (GraphicsPointEllipse *shadow)
	Bind this graphics item to its shadow. More...

Detailed Description

This class add event handling to QGraphicsEllipseItem.

Definition at line 17 of file GraphicsPointEllipse.h.

Constructor & Destructor Documentation

◆ GraphicsPointEllipse()

GraphicsPointEllipse::GraphicsPointEllipse	(	GraphicsPoint &	graphicsPoint,
		const QRect &	rect
	)

Single constructor.

Definition at line 15 of file GraphicsPointEllipse.cpp.

                                                               :
   QGraphicsEllipseItem (rect),
   m_graphicsPoint (graphicsPoint),
   m_shadow (nullptr)
 {
   LOG4CPP_INFO_S ((*mainCat)) << "GraphicsPointEllipse::GraphicsPointEllipse";
 }

Member Function Documentation

◆ hoverEnterEvent()

void GraphicsPointEllipse::hoverEnterEvent ( QGraphicsSceneHoverEvent * event )

virtual

Accept hover so point can be highlighted when cursor is over it as a guide to user.

Definition at line 24 of file GraphicsPointEllipse.cpp.

 {
   // Highlighted
   setOpacityForSubtree (m_graphicsPoint.highlightOpacity());
 
   emit signalPointHoverEnter (data (DATA_KEY_IDENTIFIER).toString ());
 
   QGraphicsEllipseItem::hoverEnterEvent (event);
 }

◆ hoverLeaveEvent()

void GraphicsPointEllipse::hoverLeaveEvent ( QGraphicsSceneHoverEvent * event )

virtual

Unhighlight this point.

Definition at line 34 of file GraphicsPointEllipse.cpp.

 {
   // Unhighlighted
   setOpacityForSubtree (MAX_OPACITY);
 
   emit signalPointHoverLeave (data (DATA_KEY_IDENTIFIER).toString ());
 
   QGraphicsEllipseItem::hoverLeaveEvent (event);
 }

◆ itemChange()

QVariant GraphicsPointEllipse::itemChange	(	GraphicsItemChange	change,
		const QVariant &	value
	)

Intercept moves by dragging so moved items can be identified. This replaces unreliable hit tests.

Definition at line 44 of file GraphicsPointEllipse.cpp.

 {
   if (change == QGraphicsItem::ItemPositionHasChanged) {
 
     LOG4CPP_DEBUG_S ((*mainCat)) << "GraphicsPointEllipse::itemChange"
                                  << " identifier=" << data (DATA_KEY_IDENTIFIER).toString().toLatin1().data()
                                  << " positionHasChanged";
 
     setData (DATA_KEY_POSITION_HAS_CHANGED, QVariant (true));
   }
 
   return QGraphicsEllipseItem::itemChange(change,
                                           value);
 }

◆ setRadius()

void GraphicsPointEllipse::setRadius ( int radius )

Update the radius.

Definition at line 72 of file GraphicsPointEllipse.cpp.

 {
   // Resize assuming symmetry about the origin, and an aspect ratio of 1:1 (so x and y scales are the same)
   if (boundingRect().width() > 0) {
     double scale = (2 * radius) / boundingRect().width();
     setScale (scale);
   }
 }

◆ setShadow()

void GraphicsPointEllipse::setShadow ( GraphicsPointEllipse * shadow )

Bind this graphics item to its shadow.

Definition at line 81 of file GraphicsPointEllipse.cpp.

 {
   m_shadow = shadow;
 }

◆ signalPointHoverEnter

void GraphicsPointEllipse::signalPointHoverEnter ( QString )

signal

Signal for geometry window to highlight the current point upon hover enter.

◆ signalPointHoverLeave

void GraphicsPointEllipse::signalPointHoverLeave ( QString )