mirror of https://github.com/fltk/fltk
89 lines
2.7 KiB
C++
89 lines
2.7 KiB
C++
//
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// "$Id$"
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//
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// Main header file for the Fast Light Tool Kit (FLTK).
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//
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// Copyright 1998-2016 by Bill Spitzak and others.
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//
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// This library is free software. Distribution and use rights are outlined in
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// the file "COPYING" which should have been included with this file. If this
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// file is missing or damaged, see the license at:
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//
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// http://www.fltk.org/COPYING.php
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//
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// Please report all bugs and problems on the following page:
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//
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// http://www.fltk.org/str.php
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//
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/* \file
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Handling transparently platform dependent cairo include files
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*/
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#ifndef FL_CAIRO_H
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# define FL_CAIRO_H
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# ifdef FLTK_HAVE_CAIRO
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// Cairo is currently supported for the following platforms:
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// Win32, Apple Quartz, X11
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# include <FL/Fl_Export.H>
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# include <cairo.h>
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/**
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\addtogroup group_cairo
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@{
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*/
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/**
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Contains all the necessary info on the current cairo context.
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A private internal & unique corresponding object is created to
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permit cairo context state handling while keeping it opaque.
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For internal use only.
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\note Only available when configure has the --enable-cairo option
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*/
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class FL_EXPORT Fl_Cairo_State {
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public:
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Fl_Cairo_State() : cc_(0), own_cc_(false), autolink_(false), window_(0), gc_(0) {}
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// access attributes
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cairo_t* cc() const {return cc_;} ///< Gets the current cairo context
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bool autolink() const {return autolink_;} ///< Gets the autolink option. See Fl::cairo_autolink_context(bool)
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/** Sets the current cairo context.
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\p own == \e true (the default) indicates that the cairo context \p c
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will be deleted by FLTK internally when another cc is set later.
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\p own == \e false indicates cc deletion is handled externally
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by the user program.
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*/
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void cc(cairo_t* c, bool own=true) {
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if (cc_ && own_cc_) cairo_destroy(cc_);
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cc_=c;
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if (!cc_) window_=0;
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own_cc_=own;
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}
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void autolink(bool b); ///< Sets the autolink option, only available with --enable-cairoext
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void window(void* w) {window_=w;} ///< Sets the window \p w to keep track on
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void* window() const {return window_;} ///< Gets the last window attached to a cc
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void gc(void* c) {gc_=c;} ///< Sets the gc \p c to keep track on
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void* gc() const {return gc_;} ///< Gets the last gc attached to a cc
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private:
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cairo_t * cc_; // contains the unique autoupdated cairo context
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bool own_cc_; // indicates whether we must delete the cc, useful for internal cleanup
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bool autolink_; // false by default, prevents the automatic cairo mapping on fltk windows
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// for custom cairo implementations.
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void* window_, *gc_; // for keeping track internally of last win+gc treated
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};
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/** @} */
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# endif // FLTK_HAVE_CAIRO
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#endif // FL_CAIRO_H
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//
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// End of "$Id$" .
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//
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