nsbaci::ui::DrawingWidget Class Reference

Qt widget that provides a drawing canvas. More...

#include <drawingWidget.h>

Inheritance diagram for nsbaci::ui::DrawingWidget:

Collaboration diagram for nsbaci::ui::DrawingWidget:

Public Slots
void	onDrawCommand (const nsbaci::types::DrawCommand &command)
	Handle a drawing command.
void	onDrawRequested (const nsbaci::types::Drawable &drawable)
	Handle a drawable object.
void	onClearRequested (const nsbaci::types::Color &color)
	Clear the canvas with a specific color.
void	onRefreshRequested ()
	Refresh the canvas display.
void	onCanvasSizeChanged (const nsbaci::types::Size &size)
	Handle canvas size change.
void	setColor (uint8_t r, uint8_t g, uint8_t b, uint8_t a=255)
	Set the current drawing color.
void	clear ()
	Clear the canvas with the current background color.
void	drawCircle (int32_t centerX, int32_t centerY, int32_t radius, bool filled=false)
	Draw a circle.
void	drawRectangle (int32_t x, int32_t y, int32_t width, int32_t height, bool filled=false)
	Draw a rectangle.
void	drawTriangle (int32_t x1, int32_t y1, int32_t x2, int32_t y2, int32_t x3, int32_t y3, bool filled=false)
	Draw a triangle.
void	drawLine (int32_t x1, int32_t y1, int32_t x2, int32_t y2)
	Draw a line.
void	drawEllipse (int32_t centerX, int32_t centerY, int32_t radiusX, int32_t radiusY, bool filled=false)
	Draw an ellipse.
void	drawPixel (int32_t x, int32_t y)
	Draw a pixel.
void	drawText (int32_t x, int32_t y, const QString &text, int32_t fontSize=12)
	Draw text.
void	setLineWidth (int32_t width)
	Set the line width.
void	reset ()
	Reset the widget to initial state.

Public Member Functions
	DrawingWidget (QWidget *parent=nullptr)
	Constructs the drawing widget.
	~DrawingWidget () override=default
	Destructor.
nsbaci::types::Size	getCanvasSize () const
	Get the current canvas size.
QSize	minimumSizeHint () const override
	Get the minimum size hint for the widget.
QSize	sizeHint () const override
	Get the size hint for the widget.

Protected Member Functions
void	paintEvent (QPaintEvent *event) override
	Paint event handler.
void	resizeEvent (QResizeEvent *event) override
	Resize event handler.

Detailed Description

Qt widget that provides a drawing canvas.

The DrawingWidget maintains a pixel buffer (QPixmap) where all drawing operations are performed. It supports various shapes, colors, and provides a persistent canvas that preserves drawings between repaints.

Constructor & Destructor Documentation

DrawingWidget()

nsbaci::ui::DrawingWidget::DrawingWidget ( QWidget * parent = nullptr )

explicit

Constructs the drawing widget.

Parameters

parent

Optional parent widget.

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Member Function Documentation

getCanvasSize()

nsbaci::types::Size nsbaci::ui::DrawingWidget::getCanvasSize

(

)

const

Get the current canvas size.

Returns

The canvas size.

minimumSizeHint()

QSize nsbaci::ui::DrawingWidget::minimumSizeHint ( ) const

override

Get the minimum size hint for the widget.

Returns

The minimum size.

onCanvasSizeChanged

void nsbaci::ui::DrawingWidget::onCanvasSizeChanged ( const nsbaci::types::Size & size )

slot

Handle canvas size change.

Parameters

size	The new canvas size.

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onClearRequested

void nsbaci::ui::DrawingWidget::onClearRequested ( const nsbaci::types::Color & color )

slot

Clear the canvas with a specific color.

Parameters

color

The background color.

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onDrawCommand

void nsbaci::ui::DrawingWidget::onDrawCommand ( const nsbaci::types::DrawCommand & command )

slot

Handle a drawing command.

Parameters

command

The command to execute.

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onDrawRequested

void nsbaci::ui::DrawingWidget::onDrawRequested ( const nsbaci::types::Drawable & drawable )

slot

Handle a drawable object.

Parameters

drawable

The drawable to render.

paintEvent()

void nsbaci::ui::DrawingWidget::paintEvent ( QPaintEvent * event )

overrideprotected

Paint event handler.

Parameters

event

The paint event.

resizeEvent()

void nsbaci::ui::DrawingWidget::resizeEvent ( QResizeEvent * event )

overrideprotected

Resize event handler.

Parameters

event

The resize event.

sizeHint()

QSize nsbaci::ui::DrawingWidget::sizeHint ( ) const

override

Get the size hint for the widget.

Returns

The preferred size.

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

• drawingWidget.h
• drawingWidget.cpp