xref: /trunk/main/sd/source/ui/inc/tools/IconCache.hxx (revision cdf0e10c)
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27*cdf0e10cSrcweir 
28*cdf0e10cSrcweir #ifndef SD_ICON_CACHE_HXX
29*cdf0e10cSrcweir #define SD_ICON_CACHE_HXX
30*cdf0e10cSrcweir 
31*cdf0e10cSrcweir #include "SdGlobalResourceContainer.hxx"
32*cdf0e10cSrcweir #include <vcl/image.hxx>
33*cdf0e10cSrcweir 
34*cdf0e10cSrcweir namespace sd {
35*cdf0e10cSrcweir 
36*cdf0e10cSrcweir /** This simple class stores frequently used icons so that the classes that
37*cdf0e10cSrcweir     use the icons do not have to store them in every one of their
38*cdf0e10cSrcweir     instances.
39*cdf0e10cSrcweir 
40*cdf0e10cSrcweir     Icons are adressed over their resource id and are loaded on demand.
41*cdf0e10cSrcweir 
42*cdf0e10cSrcweir     This cache acts like a singleton with a lifetime equal to that of the sd
43*cdf0e10cSrcweir     module.
44*cdf0e10cSrcweir */
45*cdf0e10cSrcweir class IconCache
46*cdf0e10cSrcweir     : public SdGlobalResource
47*cdf0e10cSrcweir {
48*cdf0e10cSrcweir public:
49*cdf0e10cSrcweir     /** The lifetime of the returned reference is limited to that of the sd
50*cdf0e10cSrcweir         module.
51*cdf0e10cSrcweir     */
52*cdf0e10cSrcweir     static IconCache& Instance (void);
53*cdf0e10cSrcweir 
54*cdf0e10cSrcweir     /** Return the icon with the given resource id.
55*cdf0e10cSrcweir         @return
56*cdf0e10cSrcweir             The returned Image may be empty when there is no icon for the
57*cdf0e10cSrcweir             given id or an error occured.  Should not happen under normal
58*cdf0e10cSrcweir             circumstances.
59*cdf0e10cSrcweir     */
60*cdf0e10cSrcweir     Image GetIcon (sal_uInt16 nResourceId);
61*cdf0e10cSrcweir 
62*cdf0e10cSrcweir private:
63*cdf0e10cSrcweir     class Implementation;
64*cdf0e10cSrcweir     ::std::auto_ptr<Implementation> mpImpl;
65*cdf0e10cSrcweir 
66*cdf0e10cSrcweir     /** The constructor creates the one instance of the cache and registers
67*cdf0e10cSrcweir         it at the SdGlobalResourceContainer to limit is lifetime to that of
68*cdf0e10cSrcweir         the sd module.
69*cdf0e10cSrcweir     */
70*cdf0e10cSrcweir     IconCache (void);
71*cdf0e10cSrcweir 
72*cdf0e10cSrcweir     /** This destructor is called by SdGlobalResourceContainer.
73*cdf0e10cSrcweir     */
74*cdf0e10cSrcweir     virtual ~IconCache (void);
75*cdf0e10cSrcweir };
76*cdf0e10cSrcweir 
77*cdf0e10cSrcweir } // end of namespace sd
78*cdf0e10cSrcweir 
79*cdf0e10cSrcweir #endif
80