KIGFX::PREVIEW::DRAW_CONTEXT Class Reference

A KIGFX::PREVIEW::DRAW_CONTEXT is a wrapper around a GAL and some other settings that makes it easy to draw preview items consistently. More...

#include <draw_context.h>

Public Member Functions
	DRAW_CONTEXT (KIGFX::VIEW &aView)
void	DrawCircle (const VECTOR2I &aOrigin, double aRad, bool aDeEmphasised)
	Draw a preview circle on the current layer. More...
void	DrawLine (const VECTOR2I &aStart, const VECTOR2I &aEnd, bool aDeEmphasised)
	Draw a simple line on the current layer. More...
void	DrawLineWithAngleHighlight (const VECTOR2I &aStart, const VECTOR2I &aEnd, bool aDeEmphasised)
	Draw a straight line on the current layer, with a special highlight when the line angle is a multiple of 45 degrees. More...
void	DrawArcWithAngleHighlight (const VECTOR2I &aOrigin, double aRad, double aStartAngle, double aEndAngle)
	Draw an arc on the current layer, with a special highlight when the line angle is a multiple of 45 degrees. More...

Private Member Functions
COLOR4D	getSpecialAngleColour () const
	The GAL to draw into. More...

Private Attributes
KIGFX::GAL &	m_gal
const KIGFX::RENDER_SETTINGS &	m_render_settings
	The current layer to draw onto. More...
GAL_LAYER_ID	m_currLayer
float	m_lineWidth
	The line width to use for items. More...

Detailed Description

A KIGFX::PREVIEW::DRAW_CONTEXT is a wrapper around a GAL and some other settings that makes it easy to draw preview items consistently.

This class provides some graphical items that are often used by preview items. Complex items can be composed from these.

Definition at line 44 of file draw_context.h.

Constructor & Destructor Documentation

DRAW_CONTEXT()

DRAW_CONTEXT::DRAW_CONTEXT

(

KIGFX::VIEW &

aView

)

Definition at line 48 of file draw_context.cpp.

Member Function Documentation

DrawArcWithAngleHighlight()

void KIGFX::PREVIEW::DRAW_CONTEXT::DrawArcWithAngleHighlight	(	const VECTOR2I &	aOrigin,
		double	aRad,
		double	aStartAngle,
		double	aEndAngle
	)

Draw an arc on the current layer, with a special highlight when the line angle is a multiple of 45 degrees.

Parameters

aOrigin	the arc centre
aRad	the arc radius
aStartAngle	the arc start angle
aEndAngle	the arc end angle

DrawCircle()

void DRAW_CONTEXT::DrawCircle	(	const VECTOR2I &	aOrigin,
		double	aRad,
		bool	aDeEmphasised
	)

Draw a preview circle on the current layer.

Parameters

aOrigin	circle origin
aRad	circle radius
aDeEmphasised	draw the circle de-emphasised

Definition at line 57 of file draw_context.cpp.

References color, deemphasise(), KIGFX::GAL::DrawCircle(), KIGFX::RENDER_SETTINGS::GetLayerColor(), m_currLayer, m_gal, m_lineWidth, m_render_settings, KIGFX::GAL::SetIsFill(), KIGFX::GAL::SetIsStroke(), KIGFX::GAL::SetLineWidth(), and KIGFX::GAL::SetStrokeColor().

Referenced by KIGFX::PREVIEW::ARC_ASSISTANT::ViewDraw().

DrawLine()

void DRAW_CONTEXT::DrawLine	(	const VECTOR2I &	aStart,
		const VECTOR2I &	aEnd,
		bool	aDeEmphasised
	)

Draw a simple line on the current layer.

Parameters

aStart	line start point
aEnd	line end point
aDeEmphasised	draw the line de-emphasised

Definition at line 69 of file draw_context.cpp.

References deemphasise(), KIGFX::GAL::DrawLine(), KIGFX::RENDER_SETTINGS::GetLayerColor(), m_currLayer, m_gal, m_lineWidth, m_render_settings, KIGFX::GAL::SetIsStroke(), KIGFX::GAL::SetLineWidth(), and KIGFX::GAL::SetStrokeColor().

Referenced by KIGFX::PREVIEW::TWO_POINT_ASSISTANT::ViewDraw().

DrawLineWithAngleHighlight()

void DRAW_CONTEXT::DrawLineWithAngleHighlight	(	const VECTOR2I &	aStart,
		const VECTOR2I &	aEnd,
		bool	aDeEmphasised
	)

Draw a straight line on the current layer, with a special highlight when the line angle is a multiple of 45 degrees.

Parameters

aStart	line start point
aEnd	line end point
aDeEmphasised	draw the line de-emphasised

Definition at line 80 of file draw_context.cpp.

References angleIsSpecial(), deemphasise(), KIGFX::GAL::DrawLine(), KIGFX::RENDER_SETTINGS::GetLayerColor(), getSpecialAngleColour(), m_currLayer, m_gal, m_lineWidth, m_render_settings, KIGFX::GAL::SetIsStroke(), KIGFX::GAL::SetLineWidth(), and KIGFX::GAL::SetStrokeColor().

Referenced by KIGFX::PREVIEW::ARC_ASSISTANT::ViewDraw().

getSpecialAngleColour()

COLOR4D DRAW_CONTEXT::getSpecialAngleColour ( ) const

private

The GAL to draw into.

Returns

the colour to use for "special" angles

Definition at line 96 of file draw_context.cpp.

References KIGFX::RENDER_SETTINGS::IsBackgroundDark(), and m_render_settings.

Referenced by DrawLineWithAngleHighlight().

Member Data Documentation

m_currLayer

GAL_LAYER_ID KIGFX::PREVIEW::DRAW_CONTEXT::m_currLayer

private

Definition at line 104 of file draw_context.h.

Referenced by DrawCircle(), DrawLine(), and DrawLineWithAngleHighlight().

m_gal

KIGFX::GAL& KIGFX::PREVIEW::DRAW_CONTEXT::m_gal

private

Definition at line 99 of file draw_context.h.

Referenced by DrawCircle(), DrawLine(), and DrawLineWithAngleHighlight().

m_lineWidth

float KIGFX::PREVIEW::DRAW_CONTEXT::m_lineWidth

private

The line width to use for items.

Definition at line 107 of file draw_context.h.

Referenced by DrawCircle(), DrawLine(), and DrawLineWithAngleHighlight().

m_render_settings

const KIGFX::RENDER_SETTINGS& KIGFX::PREVIEW::DRAW_CONTEXT::m_render_settings

private

The current layer to draw onto.

Definition at line 101 of file draw_context.h.

Referenced by DrawCircle(), DrawLine(), DrawLineWithAngleHighlight(), and getSpecialAngleColour().

---

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

• draw_context.h
• draw_context.cpp