An interface to encapsulate some platform dependencies. More...

#include <platform.hh>

Public Member Functions
virtual void	setLayout (Layout *layout)=0
	This methods notifies the platform, that it has been attached to a layout.

virtual void	attachView (View *view)=0
	This methods notifies the platform, that a view has been attached to the related layout.

virtual void	detachView (View *view)=0
	This methods notifies the platform, that a view has been detached from the related layout.

virtual int	textWidth (style::Font font, const char text, int len)=0
	Return the width of a text, with a given length and font.

virtual char *	textToUpper (const char *text, int len)=0
	Return the string resulting from transforming text to uppercase.

virtual char *	textToLower (const char *text, int len)=0
	Return the string resulting from transforming text to lowercase.

virtual int	nextGlyph (const char *text, int idx)=0
	Return the index of the next glyph in string text.

virtual int	prevGlyph (const char *text, int idx)=0
	Return the index of the previous glyph in string text.

virtual float	dpiX ()=0
	Return screen resolution in x-direction.

virtual float	dpiY ()=0
	Return screen resolution in y-direction.

virtual int	addIdle (void(Layout::*func)())=0
	Add an idle function.

virtual void	removeIdle (int idleId)=0
	Remove an idle function, which has not been processed yet.

virtual style::Font *	createFont (style::FontAttrs *attrs, bool tryEverything)=0
	Create a (platform dependent) font.

virtual bool	fontExists (const char *name)=0

virtual style::Color *	createColor (int color)=0
	Create a color resource for a given 0xrrggbb value.

virtual style::Tooltip *	createTooltip (const char *text)=0
	Create a tooltip.

virtual void	cancelTooltip ()=0
	Cancel a tooltip (either shown or requested)

virtual Imgbuf *	createImgbuf (Imgbuf::Type type, int width, int height, double gamma)=0
	Create a (platform speficic) image buffer.

virtual void	copySelection (const char *text)=0
	Copy selected text (0-terminated).

virtual ui::ResourceFactory *	getResourceFactory ()=0
	...

Public Member Functions inherited from lout::object::Object
virtual	~Object ()
	The destructor is defined as virtual (but not abstract), so that destruction of Object's works properly.

virtual bool	equals (Object *other)
	Returns, whether two objects are equal.

virtual int	hashValue ()
	Return a hash value for the object.

virtual Object *	clone ()
	Return an exact copy of the object.

virtual void	intoStringBuffer (misc::StringBuffer *sb)
	Store a textual representation of the object in a misc::StringBuffer.

const char *	toString ()
	Use object::Object::intoStringBuffer to return a textual representation of the object.

virtual size_t	sizeOf ()
	Return the number of bytes, this object totally uses.

Detailed Description

An interface to encapsulate some platform dependencies.

See also: Dillo Widget Overview

Definition at line 16 of file platform.hh.

Member Function Documentation

◆ addIdle()

virtual int dw::core::Platform::addIdle ( void(Layout::*)() func )

pure virtual

Add an idle function.

An idle function is called once, when no other tasks are to be done (e.g. there are no events to process), and then removed from the queue. The return value is a number, which can be used in removeIdle below.

Referenced by dw::core::Layout::queueResize(), and dw::core::Layout::scrollTo0().

◆ attachView()

virtual void dw::core::Platform::attachView ( View * view )

pure virtual

This methods notifies the platform, that a view has been attached to the related layout.

Implemented in dw::fltk::FltkPlatform.

Referenced by dw::core::Layout::attachView().

◆ cancelTooltip()

virtual void dw::core::Platform::cancelTooltip ( )

pure virtual

Cancel a tooltip (either shown or requested)

Implemented in dw::fltk::FltkPlatform.

Referenced by dw::core::Layout::cancelTooltip().

◆ copySelection()

virtual void dw::core::Platform::copySelection ( const char * text )

pure virtual

Copy selected text (0-terminated).

Implemented in dw::fltk::FltkPlatform.

Referenced by dw::core::Layout::copySelection().

◆ createColor()

virtual style::Color * dw::core::Platform::createColor ( int color )

pure virtual

Create a color resource for a given 0xrrggbb value.

Implemented in dw::fltk::FltkPlatform.

Referenced by dw::core::Layout::createColor().

◆ createFont()

virtual style::Font * dw::core::Platform::createFont	(	style::FontAttrs *	attrs,
		bool	tryEverything
	)

pure virtual

Create a (platform dependent) font.

Typically, within a platform, a sub class of dw::core::style::Font is defined, which holds more platform dependent data.

Also, this method must fill the attributes "font" (when needed), "ascent", "descent", "spaceSidth", "zeroWidth" and "xHeight". If "tryEverything" is true, several methods should be used to use another font, when the requested font is not available. Passing false is typically done, if the caller wants to test different variations.

Implemented in dw::fltk::FltkPlatform.

Referenced by dw::core::Layout::createFont().