docs/latex/wx/artprov.tex

   1 %
   2 % automatically generated by HelpGen $Revision$ from
   3 % artprov.h at 08/Apr/02 17:44:57
   4 %
   5
   6 \section{\class{wxArtProvider}}\label{wxartprovider}
   7
   8 wxArtProvider class is used to customize the look of wxWidgets application.
   9 When wxWidgets needs to display an icon or a bitmap (e.g. in the standard file
  10 dialog), it does not use a hard-coded resource but asks wxArtProvider for it
  11 instead. This way users can plug in their own wxArtProvider class and easily
  12 replace standard art with their own version. All
  13 that is needed is to derive a class from wxArtProvider, override its
  14 \helpref{CreateBitmap}{wxartprovidercreatebitmap} method and register the
  15 provider with
  16 \helpref{wxArtProvider::PushProvider}{wxartproviderpushprovider}:
  17
  18 \begin{verbatim}
  19   class MyProvider : public wxArtProvider
  20   {
  21   protected:
  22     wxBitmap CreateBitmap(const wxArtID& id,
  23                           const wxArtClient& client,
  24                           const wxSize size)
  25     { ... }
  26   };
  27   ...
  28   wxArtProvider::PushProvider(new MyProvider);
  29 \end{verbatim}
  30
  31 There's another way of taking advantage of this class: you can use it in your code and use
  32 platform native icons as provided by \helpref{wxArtProvider::GetBitmap}{wxartprovidergetbitmap} or
  33 \helpref{wxArtProvider::GetIcon}{wxartprovidergeticon} (NB: this is not yet really
  34 possible as of wxWidgets 2.3.3, the set of wxArtProvider bitmaps is too
  35 small).
  36
  37 \membersection{Identifying art resources}\label{artprovideridentifying}
  38
  39 Every bitmap is known to wxArtProvider under an unique ID that is used by when
  40 requesting a resource from it. The ID is represented by wxArtID type and can
  41 have one of these predefined values (you can see bitmaps represented by these
  42 constants in the \helpref{artprov}{sampleartprovider} sample):
  43 \begin{itemize}\itemsep=0pt
  44 \item wxART\_ADD\_BOOKMARK
  45 \item wxART\_DEL\_BOOKMARK
  46 \item wxART\_HELP\_SIDE\_PANEL
  47 \item wxART\_HELP\_SETTINGS
  48 \item wxART\_HELP\_BOOK
  49 \item wxART\_HELP\_FOLDER
  50 \item wxART\_HELP\_PAGE
  51 \item wxART\_GO\_BACK
  52 \item wxART\_GO\_FORWARD
  53 \item wxART\_GO\_UP
  54 \item wxART\_GO\_DOWN
  55 \item wxART\_GO\_TO\_PARENT
  56 \item wxART\_GO\_HOME
  57 \item wxART\_FILE\_OPEN
  58 \item wxART\_PRINT
  59 \item wxART\_HELP
  60 \item wxART\_TIP
  61 \item wxART\_REPORT\_VIEW
  62 \item wxART\_LIST\_VIEW
  63 \item wxART\_NEW\_DIR
  64 \item wxART\_FOLDER
  65 \item wxART\_GO\_DIR\_UP
  66 \item wxART\_EXECUTABLE\_FILE
  67 \item wxART\_NORMAL\_FILE
  68 \item wxART\_TICK\_MARK
  69 \item wxART\_CROSS\_MARK
  70 \item wxART\_ERROR
  71 \item wxART\_QUESTION
  72 \item wxART\_WARNING
  73 \item wxART\_INFORMATION
  74 \item wxART\_MISSING\_IMAGE
  75 \end{itemize}
  76
  77 Additionally, any string recognized by custom art providers registered using
  78 \helpref{PushProvider}{wxartproviderpushprovider} may be used.
  79
  80 \wxheading{GTK+ Note}
  81
  82 When running under GTK+ 2, GTK+ stock item IDs (e.g. {\tt "gtk-cdrom"}) may
  83 be used as well. Additionally, if wxGTK was compiled against GTK+ >= 2.4, then
  84 it is also possible to load icons from current icon theme by specifying their
  85 name (without extension and directory components). Icon themes recognized
  86 by GTK+ follow the
  87 \urlref{freedesktop.org Icon Themes specification}{http://freedesktop.org/Standards/icon-theme-spec}. Note that themes are not guaranteed to contain all
  88 icons, so wxArtProvider may return {\tt wxNullBitmap} or {\tt wxNullIcon}.
  89 Default theme is typically installed in {\tt /usr/share/icons/hicolor}.
  90
  91 \membersection{Clients}\label{artproviderclients}
  92
  93 Client is the entity that calls wxArtProvider's GetBitmap or GetIcon
  94 function. It is represented by wxClientID type and can have one of these
  95 values:
  96 \begin{itemize}\itemsep=0pt
  97 \item wxART\_TOOLBAR
  98 \item wxART\_MENU
  99 \item wxART\_BUTTON
 100 \item wxART\_FRAME\_ICON
 101 \item wxART\_CMN\_DIALOG
 102 \item wxART\_HELP\_BROWSER
 103 \item wxART\_MESSAGE\_BOX
 104 \item wxART\_OTHER (used for all requests that don't fit into any of the categories above)
 105 \end{itemize}
 106 Client ID servers as a hint to wxArtProvider that is supposed to help it to
 107 choose the best looking bitmap. For example it is often desirable to use
 108 slightly different icons in menus and toolbars even though they represent the
 109 same action (e.g. {\tt wx\_ART\_FILE\_OPEN}). Remember that this is really
 110 only a hint for wxArtProvider -- it is common that
 111 \helpref{wxArtProvider::GetBitmap}{wxartprovidergetbitmap}
 112 returns identical bitmap for different {\it client} values!
 113
 114 \wxheading{See also}
 115
 116 See the \helpref{artprov}{sampleartprovider} sample for an example of wxArtProvider usage.
 117
 118 \wxheading{Derived from}
 119
 120 \helpref{wxObject}{wxobject}
 121
 122 \wxheading{Include files}
 123
 124 <wx/artprov.h>
 125
 126 \latexignore{\rtfignore{\wxheading{Members}}}
 127
 128 \membersection{wxArtProvider::CreateBitmap}\label{wxartprovidercreatebitmap}
 129
 130 \func{wxBitmap}{CreateBitmap}{\param{const wxArtID\& }{id}, \param{const wxArtClient\& }{client}, \param{const wxSize\& }{size}}
 131
 132 Derived art provider classes must override this method to create requested
 133 art resource. Note that returned bitmaps are cached by wxArtProvider and it is therefore
 134 not necessary to optimize CreateBitmap for speed (e.g. you may create wxBitmap objects
 135 from XPMs here).
 136
 137 \wxheading{Parameters}
 138
 139 \docparam{id}{wxArtID unique identifier of the bitmap.}
 140
 141 \docparam{client}{wxArtClient identifier of the client (i.e. who is asking for the bitmap).
 142 This only servers as a hint.}
 143
 144 \docparam{size}{Preferred size of the bitmap. The function may return a bitmap of different
 145 dimensions, it will be automatically rescaled to meet client's request.}
 146
 147 \wxheading{Note}
 148
 149 This is {\bf not} part of wxArtProvider's public API, use
 150 \helpref{wxArtProvider::GetBitmap}{wxartprovidergetbitmap} or
 151 \helpref{wxArtProvider::GetIcon}{wxartprovidergeticon}
 152 to query wxArtProvider for a resource.
 153
 154 \membersection{wxArtProvider::GetBitmap}\label{wxartprovidergetbitmap}
 155
 156 \func{static wxBitmap}{GetBitmap}{\param{const wxArtID\& }{id}, \param{const wxArtClient\& }{client = wxART\_OTHER}, \param{const wxSize\& }{size = wxDefaultSize}}
 157
 158 Query registered providers for bitmap with given ID.
 159
 160 \wxheading{Parameters}
 161
 162 \docparam{id}{wxArtID unique identifier of the bitmap.}
 163
 164 \docparam{client}{wxArtClient identifier of the client (i.e. who is asking for the bitmap).}
 165
 166 \docparam{size}{Size of the returned bitmap or {\tt wxDefaultSize} if size doesn't matter.}
 167
 168 \wxheading{Return value}
 169
 170 The bitmap if one of registered providers recognizes the ID or wxNullBitmap otherwise.
 171
 172 \membersection{wxArtProvider::GetIcon}\label{wxartprovidergeticon}
 173
 174 \func{static wxIcon}{GetIcon}{\param{const wxArtID\& }{id}, \param{const wxArtClient\& }{client = wxART\_OTHER}, \param{const wxSize\& }{size = wxDefaultSize}}
 175
 176 Same as \helpref{wxArtProvider::GetBitmap}{wxartprovidergetbitmap}, but
 177 return a wxIcon object (or wxNullIcon on failure).
 178
 179 \func{static wxSize}{GetSizeHint}{\param{const wxArtClient\& }{client}, \param{bool }{platform_default = false}}
 180
 181 Returns a suitable size hint for the given {\it wxArtClient}. If
 182 {\it platform_default} is \true, return a size based on the current platform,
 183 otherwise return the size from the topmost wxArtProvider. {\it wxDefaultSize} may be
 184 returned if the client doesn't have a specified size, like wxART_OTHER for example.
 185
 186 \membersection{wxArtProvider::PopProvider}\label{wxartproviderctor}
 187
 188 \func{static bool}{PopProvider}{\void}
 189
 190 Remove latest added provider and delete it.
 191
 192 \membersection{wxArtProvider::PushProvider}\label{wxartproviderpushprovider}
 193
 194 \func{static void}{PushProvider}{\param{wxArtProvider* }{provider}}
 195
 196 Register new art provider (add it to the top of providers stack).
 197
 198 \membersection{wxArtProvider::RemoveProvider}\label{wxartproviderremoveprovider}
 199
 200 \func{static bool}{RemoveProvider}{\param{wxArtProvider* }{provider}}
 201
 202 Remove a provider from the stack. The provider must have been added previously
 203 and is {\it not} deleted.
 204