UWinGraph Class Reference

internal Graphics context for drawing Ubit objects. More...

#include <ugraph.hpp>

Inheritance diagram for UWinGraph:

List of all members.

Public Member Functions
	UWinGraph (class UWin *)
bool	init (UDisp *, UView *window_view)
	inits the WinGraph
bool	isWinRealized () const
	is the X Window created ?.
UDisp *	getDisp () const
	returns the logical Display of this View.
UAppli *	getAppli () const
	returns the Application context.
UWin *	getHardwin () const
	returns the "hard window" that contains the current View.
UNatWin *	getNatWin () const
	gives acces to implementation-dependent hidden objects
UNatDisp *	getNatDisp () const
void	begin (const URegion &clip)
	must be called before drawing (to allocate graphical resources)
void	end ()
	must be called after drawing (to release graphical resources)
void	beginDoublebuf (const URegion &clip)
void	beginBlend (const URegion &clip, float alpha)
void	beginSubwin (const URegion &clip, u_pos xwin, u_pos ywin)
	variants of the begin() function
void	endBlend ()
void	blendColor (const URegion &clip, float alpha)
	blends the 'clip' zone with current color
void	setClip (const URegion &)
void	setClip (u_pos x, u_pos y, u_dim width, u_dim height)
	set the clipping zone relatively to VIEW coordinates
void	setWinClip (const URegion &r)
void	setWinClip (u_pos x, u_pos y, u_dim width, u_dim height)
	setClip and setWinClip are similar for this class:

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Detailed Description

internal Graphics context for drawing Ubit objects.

Notes:

• clients should use the UGraph (not UWinGraph that is reserved for the Ubit lib)
• UWinGraph is an optimized version of UGraph for drawing directly in Ubit windows. Its methods use absolute Window coordinate instead of relative coordinates in the current View
• note that UWinGraph does not use the same internal X GCs than UGraph

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Member Function Documentation

void UWinGraph::begin (  const URegion &  clip  )

must be called before drawing (to allocate graphical resources) the clip specificlip specifies where drawing will take place in the WINDOW. a drawing sequence must start by begin() and finish by end()

void UWinGraph::beginSubwin (  const URegion &  clip, u_pos  xwin, u_pos  ywin )

variants of the begin() function a drawing sequence must always be terminated by end()

void UWinGraph::blendColor (  const URegion &  clip, float  alpha )

blends the 'clip' zone with current color 'alpha' is the value for alpha blending. the current color must have been specified by calling setColor()

void UWinGraph::end (   )

must be called after drawing (to release graphical resources) a drawing sequence must start by begin() and finish by end()

class UNatWin* UWinGraph::getNatWin (   )  const

gives acces to implementation-dependent hidden objects Note: these "Native Objects" encapsulate platform-dependant data. their implementation is subject to change and to vary depending on the native platform. Reimplemented from UGraph.

bool UWinGraph::init (  UDisp *  , UView *  window_view )

inits the WinGraph Note: init() does not create the X Window (this is done by UWin::realize)

void UWinGraph::setClip (  u_pos  x, u_pos  y, u_dim  width, u_dim  height )

set the clipping zone relatively to VIEW coordinates coordinates are relative to the origin of the VIEW Reimplemented from UGraph.

void UWinGraph::setWinClip (  u_pos  x, u_pos  y, u_dim  width, u_dim  height )

setClip and setWinClip are similar for this class: notes: coordinates are relative to the origin of the WINDOW in all cases the view is no taken into account see also: UGraph::setClip() and UGraph::setWinClip() Reimplemented from UGraph.

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

• ugraph.hpp
• uugraph.cpp

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