DeferredImageIconEngine

Used to render any icons when they are needed. More...

Collaboration diagram for DeferredImageIconEngine:

Public Member Functions
	DeferredImageIconEngine (const StringView &icon, QIcon::Mode mode=QIcon::Mode::Normal)
	Constructs a deferred icon engine that delays resource loading until paint time.
QSize	actualSize (const QSize &size, QIcon::Mode mode, QIcon::State state) override
	Returns the actual rendered size for the given constraints.
virtual QIconEngine *	clone (void) const override
	Creates a copy of this icon engine.
virtual void	paint (QPainter *painter, const QRect &rect, QIcon::Mode mode, QIcon::State state) override
	Paints the icon into the given rectangle using the specified painter.
virtual QPixmap	pixmap (const QSize &size, QIcon::Mode mode, QIcon::State state) override
	Returns a pixmap for the icon at the specified size, mode, and state.
void	setIcon (const StringView &icon)
	Changes the icon resource identifier.
void	setIconTheme (const IconThemeSettings theme)
	Sets the icon theme to use for rendering.

Public Attributes
QPixmap	m_cached_pixmap
	Cached pixmap to avoid redundant rendering.
QSize	m_default_size
	The default size determined from the icon resource.
String	m_icon
	The icon resource identifier.
QIcon::Mode	m_override_mode
	The icon mode override for rendering.

Detailed Description

Used to render any icons when they are needed.

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Resources will not be consumed until draw is called.

Definition at line 146 of file QTIconManager.h.

Constructor & Destructor Documentation

DeferredImageIconEngine()

DeferredImageIconEngine::DeferredImageIconEngine	(	const StringView &	icon,
		QIcon::Mode	mode = QIcon::Mode::Normal )

Constructs a deferred icon engine that delays resource loading until paint time.

Parameters

[in]	icon	The icon resource identifier.
[in]	mode	The icon mode to use when rendering.

References DeferredImageIconEngine().

Referenced by DeferredImageIconEngine().

Member Function Documentation

actualSize()

QSize DeferredImageIconEngine::actualSize ( const QSize & size, QIcon::Mode mode, QIcon::State state )

override

Returns the actual rendered size for the given constraints.

Parameters

[in]	size	The maximum available size.
[in]	mode	The icon mode.
[in]	state	The icon state.

Returns

The actual size the icon will be rendered at.

clone()

virtual QIconEngine * DeferredImageIconEngine::clone ( void ) const

overridevirtual

Creates a copy of this icon engine.

Returns

A new cloned QIconEngine instance.

paint()

virtual void DeferredImageIconEngine::paint ( QPainter * painter, const QRect & rect, QIcon::Mode mode, QIcon::State state )

overridevirtual

Paints the icon into the given rectangle using the specified painter.

Parameters

[in]	painter	The QPainter to draw with.
[in]	rect	The target rectangle.
[in]	mode	The icon mode.
[in]	state	The icon state (On or Off).

pixmap()

virtual QPixmap DeferredImageIconEngine::pixmap ( const QSize & size, QIcon::Mode mode, QIcon::State state )

overridevirtual

Returns a pixmap for the icon at the specified size, mode, and state.

Parameters

[in]	size	The requested pixmap size.
[in]	mode	The icon mode.
[in]	state	The icon state.

Returns

The rendered QPixmap.

setIcon()

void DeferredImageIconEngine::setIcon

(

const StringView &

icon

)

Changes the icon resource identifier.

Parameters

[in]

icon

The new icon resource identifier.

setIconTheme()

void DeferredImageIconEngine::setIconTheme

(

const IconThemeSettings

theme

)

Sets the icon theme to use for rendering.

Parameters

[in]

theme

The icon theme settings to apply.

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

• Widgets/Headers/QTIconManager.h