SelectableBoxGraphic Class Reference [GraphicsView]

#include <selectableboxgraphic.h>

Inherited by SelectableTextBlock, and StateBoxGraphic.

Collaboration diagram for SelectableBoxGraphic:

List of all members.

Public Types
enum	BoxStyle { kSolidWithShadow, kSolidNoShadow, kTransparent }
enum	ShowBoxStyle { kAlways, kWhenSelected }
enum	DrawBoxLineStyle { kDrawSolid, kDrawDotted }
Public Member Functions
	SelectableBoxGraphic (QGraphicsObject *parent)
	~SelectableBoxGraphic ()
virtual void	setSize (QPoint size)
	set the size of this object
void	increaseWidth (int inc)
QString	getPositionAsString ()
QString	getSizeAsString ()
void	getSize (QPoint &size)
void	setHighlighted (bool)
void	setShowBoxLineStyle (ShowBoxStyle s)
	show box allways, or only when selected
void	setDrawBoxLineStyle (DrawBoxLineStyle s)
	if drawing box, draw solid or dotted line
void	setBoxStyle (BoxStyle s)
	set box style
void	setHoverLineThickness (int t)
	set line thickness when hovered

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Detailed Description

This QGraphicsObject is designed to the base class for all scene objects that will be contained in a box. For example the StateBoxGraphic and SelectableTextBlock both use this class.

This box can be re-sized and it can be moved. For moving, we capture the mouse move events and move the box location accordingly.

To resize the box, we place small indicator boxes on the four corners that give the user a visual cue to grab with the mouse. The user then drags the corner to stretch or shrink the box. The corner grabbers are implemented with the CornerGrabber class. The CornerGrabber class captures the mouse when the mouse is over the corner's area, but the StateBox object (which owns the corners) captures and processes the mouse events on behalf of the CornerGrabbers (because the owner wants to be resized, not the CornerGrabbers themselves). This is accomplished by installed a scene event filter on the CornerGrabber objects: _corners[0]->installSceneEventFilter(this);

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Member Enumeration Documentation

enum SelectableBoxGraphic::BoxStyle

Enumerator:

kSolidWithShadow
kSolidNoShadow
kTransparent

enum SelectableBoxGraphic::DrawBoxLineStyle

Enumerator:

kDrawSolid
kDrawDotted

enum SelectableBoxGraphic::ShowBoxStyle

Enumerator:

kAlways
kWhenSelected

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Constructor & Destructor Documentation

SelectableBoxGraphic::SelectableBoxGraphic

(

QGraphicsObject *

parent

)

This box can be re-sized and it can be moved. For moving, we capture the mouse move events and move the box location accordingly.

To resize the box, we place small indicator boxes on the four corners that give the user a visual cue to grab with the mouse. The user then drags the corner to stretch or shrink the box. The corner grabbers are implemented with the CornerGrabber class. The CornerGrabber class captures the mouse when the mouse is over the corner's area, but the SelectableBoxGraphic object (which owns the corners) captures and processes the mouse events on behalf of the CornerGrabbers (because the owner wants to be resized, not the CornerGrabbers themselves). This is accomplished by installing a scene event filter on the CornerGrabber objects: _corners[0]->installSceneEventFilter(this);

SelectableBoxGraphic::~SelectableBoxGraphic

(

)

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Member Function Documentation

QString SelectableBoxGraphic::getPositionAsString

(

)

Reimplemented in StateBoxGraphic.

void SelectableBoxGraphic::getSize

(

QPoint &

size

)

Reimplemented in StateBoxGraphic.

QString SelectableBoxGraphic::getSizeAsString

(

)

Reimplemented in StateBoxGraphic.

void SelectableBoxGraphic::increaseWidth

(

int

inc

)

void SelectableBoxGraphic::setBoxStyle

(

BoxStyle

s

)

set box style

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void SelectableBoxGraphic::setDrawBoxLineStyle

(

DrawBoxLineStyle

s

)

if drawing box, draw solid or dotted line

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void SelectableBoxGraphic::setHighlighted

(

bool

on

)

Reimplemented in StateBoxGraphic.

void SelectableBoxGraphic::setHoverLineThickness

(

int

t

)

set line thickness when hovered

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void SelectableBoxGraphic::setShowBoxLineStyle

(

ShowBoxStyle

s

)

show box allways, or only when selected

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void SelectableBoxGraphic::setSize

(

QPoint

size

)

[virtual]

set the size of this object

Reimplemented in SelectableTextBlock, and StateBoxGraphic.

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

• C:/Users/David/Documents/QtProjects/visualsc/scgraphicsview/selectableboxgraphic.h
• C:/Users/David/Documents/QtProjects/visualsc/scgraphicsview/selectableboxgraphic.cpp