SimpleDrawingScene Class Reference

A QGraphicsScene subclass that provides simple drawing capabilities. More...

#include <SimpleDrawingScene.h>

Inheritance diagram for SimpleDrawingScene:

Public Types
enum class	DrawingMode { DrawingMode , EditMode }
	Defines the interaction modes for the scene. More...
enum class	SupportItemItem { Line , Rect , Ellipse , FreeHand }
	The types of drawable shapes supported by the scene. More...

Public Slots
void	undo ()
	Undoes the last drawing operation.
void	redo ()
	Redoes the last undone operation.

Public Member Functions
	SimpleDrawingScene (QObject *parent=nullptr)
	Constructs a SimpleDrawingScene.
void	setColor (const QColor &color)
	Sets the current drawing color.
QColor	getColor () const
	Gets the current drawing color.
void	setPenWidth (const short penWidth)
	Sets the pen width for drawing.
short	getPenWidth () const
	Gets the current pen width.
void	setItemType (const SupportItemItem i)
	Sets the current drawing item type.
void	setMode (const DrawingMode m)
	Sets the interaction mode.
QImage	exportImage ()
	Exports the current scene as an image.

Protected Member Functions
void	mousePressEvent (QGraphicsSceneMouseEvent *event) override
	Handles mouse press events for drawing.
void	mouseMoveEvent (QGraphicsSceneMouseEvent *event) override
	Handles mouse move events for drawing.
void	mouseReleaseEvent (QGraphicsSceneMouseEvent *event) override
	Handles mouse release events for drawing.

Detailed Description

A QGraphicsScene subclass that provides simple drawing capabilities.

This class implements a drawing canvas with multiple shape types, undo/redo functionality, and different interaction modes.

Member Enumeration Documentation

DrawingMode

enum class SimpleDrawingScene::DrawingMode

strong

Defines the interaction modes for the scene.

Enumerator
DrawingMode	Default mode for creating new items.
EditMode	Mode for selecting and modifying existing items.

SupportItemItem

enum class SimpleDrawingScene::SupportItemItem

strong

The types of drawable shapes supported by the scene.

Enumerator
Line	Straight line between two points.
Rect	Rectangle shape.
Ellipse	Ellipse or circle shape.
FreeHand	Free-form drawing with mouse movement.

Constructor & Destructor Documentation

SimpleDrawingScene()

SimpleDrawingScene::SimpleDrawingScene ( QObject *  parent = nullptr )

explicit

Constructs a SimpleDrawingScene.

Parameters

parent

The parent QObject (optional)

Member Function Documentation

exportImage()

QImage SimpleDrawingScene::exportImage

(

)

Exports the current scene as an image.

Returns

QImage containing the rendered scene

getColor()

QColor SimpleDrawingScene::getColor ( ) const

inline

Gets the current drawing color.

Returns

The current drawing color

getPenWidth()

short SimpleDrawingScene::getPenWidth ( ) const

inline

Gets the current pen width.

Returns

The current pen width in pixels

setColor()

void SimpleDrawingScene::setColor ( const QColor &  color )

inline

Sets the current drawing color.

Parameters

color

The color to use for new drawings

setItemType()

void SimpleDrawingScene::setItemType ( const SupportItemItem  i )

inline

Sets the current drawing item type.

Parameters

i	The shape type to create (from SupportItemItem enum)

setMode()

void SimpleDrawingScene::setMode

(

const DrawingMode

m

)

Sets the interaction mode.

Parameters

m	The mode to set (from DrawingMode enum)

setPenWidth()

void SimpleDrawingScene::setPenWidth ( const short  penWidth )

inline

Sets the pen width for drawing.

Parameters

penWidth

The width in pixels for new drawings

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

• builtin/app/SimpleDrawer/core/SimpleDrawingScene.h
• builtin/app/SimpleDrawer/core/SimpleDrawingScene.cpp