\section{\class{wxArtProvider}}\label{wxartprovider}
-wxArtProvider class.
+wxArtProvider class is used to customize the look of wxWidgets application.
+When wxWidgets needs to display an icon or a bitmap (e.g. in the standard file
+dialog), it does not use a hard-coded resource but asks wxArtProvider for it
+instead. This way users can plug in their own wxArtProvider class and easily
+replace standard art with their own version. All
+that is needed is to derive a class from wxArtProvider, override its
+\helpref{CreateBitmap}{wxartprovidercreatebitmap} method and register the
+provider with
+\helpref{wxArtProvider::PushProvider}{wxartproviderpushprovider}:
+
+\begin{verbatim}
+ class MyProvider : public wxArtProvider
+ {
+ protected:
+ wxBitmap CreateBitmap(const wxArtID& id,
+ const wxArtClient& client,
+ const wxSize size)
+ { ... }
+ };
+ ...
+ wxArtProvider::PushProvider(new MyProvider);
+\end{verbatim}
+
+There's another way of taking advantage of this class: you can use it in your code and use
+platform native icons as provided by \helpref{wxArtProvider::GetBitmap}{wxartprovidergetbitmap} or
+\helpref{wxArtProvider::GetIcon}{wxartprovidergeticon} (NB: this is not yet really
+possible as of wxWidgets 2.3.3, the set of wxArtProvider bitmaps is too
+small).
+
+\membersection{Identifying art resources}\label{artprovideridentifying}
+
+Every bitmap is known to wxArtProvider under an unique ID that is used by when
+requesting a resource from it. The ID is represented by wxArtID type and can
+have one of these predefined values (you can see bitmaps represented by these
+constants in the \helpref{artprov}{sampleartprovider} sample):
+\begin{itemize}\itemsep=0pt
+\item wxART\_ADD\_BOOKMARK
+\item wxART\_DEL\_BOOKMARK
+\item wxART\_HELP\_SIDE\_PANEL
+\item wxART\_HELP\_SETTINGS
+\item wxART\_HELP\_BOOK
+\item wxART\_HELP\_FOLDER
+\item wxART\_HELP\_PAGE
+\item wxART\_GO\_BACK
+\item wxART\_GO\_FORWARD
+\item wxART\_GO\_UP
+\item wxART\_GO\_DOWN
+\item wxART\_GO\_TO\_PARENT
+\item wxART\_GO\_HOME
+\item wxART\_FILE\_OPEN
+\item wxART\_PRINT
+\item wxART\_HELP
+\item wxART\_TIP
+\item wxART\_REPORT\_VIEW
+\item wxART\_LIST\_VIEW
+\item wxART\_NEW\_DIR
+\item wxART\_FOLDER
+\item wxART\_GO\_DIR\_UP
+\item wxART\_EXECUTABLE\_FILE
+\item wxART\_NORMAL\_FILE
+\item wxART\_TICK\_MARK
+\item wxART\_CROSS\_MARK
+\item wxART\_ERROR
+\item wxART\_QUESTION
+\item wxART\_WARNING
+\item wxART\_INFORMATION
+\item wxART\_MISSING\_IMAGE
+\end{itemize}
+
+Additionally, any string recognized by custom art providers registered using
+\helpref{PushProvider}{wxartproviderpushprovider} may be used.
+
+\wxheading{GTK+ Note}
+
+When running under GTK+ 2, GTK+ stock item IDs (e.g. {\tt "gtk-cdrom"}) may
+be used as well. Additionally, if wxGTK was compiled against GTK+ >= 2.4, then
+it is also possible to load icons from current icon theme by specifying their
+name (without extension and directory components). Icon themes recognized
+by GTK+ follow the
+\urlref{freedesktop.org Icon Themes specification}{http://freedesktop.org/Standards/icon-theme-spec}. Note that themes are not guaranteed to contain all
+icons, so wxArtProvider may return {\tt wxNullBitmap} or {\tt wxNullIcon}.
+Default theme is typically installed in {\tt /usr/share/icons/hicolor}.
+
+\membersection{Clients}\label{artproviderclients}
+
+Client is the entity that calls wxArtProvider's GetBitmap or GetIcon
+function. It is represented by wxClientID type and can have one of these
+values:
+\begin{itemize}\itemsep=0pt
+\item wxART\_TOOLBAR
+\item wxART\_MENU
+\item wxART\_BUTTON
+\item wxART\_FRAME\_ICON
+\item wxART\_CMN\_DIALOG
+\item wxART\_HELP\_BROWSER
+\item wxART\_MESSAGE\_BOX
+\item wxART\_OTHER (used for all requests that don't fit into any of the categories above)
+\end{itemize}
+Client ID servers as a hint to wxArtProvider that is supposed to help it to
+choose the best looking bitmap. For example it is often desirable to use
+slightly different icons in menus and toolbars even though they represent the
+same action (e.g. {\tt wx\_ART\_FILE\_OPEN}). Remember that this is really
+only a hint for wxArtProvider -- it is common that
+\helpref{wxArtProvider::GetBitmap}{wxartprovidergetbitmap}
+returns identical bitmap for different {\it client} values!
+
+\wxheading{See also}
+
+See the \helpref{artprov}{sampleartprovider} sample for an example of wxArtProvider usage.
\wxheading{Derived from}
<wx/artprov.h>
-\wxheading{Data structures}
+\latexignore{\rtfignore{\wxheading{Members}}}
-{\small \begin{verbatim}
-typedef wxString wxArtClient
-typedef wxString wxArtID
-\end{verbatim}}
+\membersection{wxArtProvider::CreateBitmap}\label{wxartprovidercreatebitmap}
-\latexignore{\rtfignore{\wxheading{Members}}}
+\func{wxBitmap}{CreateBitmap}{\param{const wxArtID\& }{id}, \param{const wxArtClient\& }{client}, \param{const wxSize\& }{size}}
-\membersection{wxArtProvider::CleanUpProviders}\label{wxartprovidercleanupproviders}
+Derived art provider classes must override this method to create requested
+art resource. Note that returned bitmaps are cached by wxArtProvider and it is therefore
+not necessary to optimize CreateBitmap for speed (e.g. you may create wxBitmap objects
+from XPMs here).
-\func{void}{CleanUpProviders}{\void}
+\wxheading{Parameters}
-Destroy caches and all providers.
+\docparam{id}{wxArtID unique identifier of the bitmap.}
-\membersection{wxArtProvider::CreateBitmap}\label{wxartprovidercreatebitmap}
+\docparam{client}{wxArtClient identifier of the client (i.e. who is asking for the bitmap).
+This only servers as a hint.}
-\func{wxBitmap}{CreateBitmap}{\param{const wxArtID\& }{WXUNUSED(id)}, \param{const wxArtClient\& }{WXUNUSED(client)}, \param{const wxSize\& }{WXUNUSED(size)}}
+\docparam{size}{Preferred size of the bitmap. The function may return a bitmap of different
+dimensions, it will be automatically rescaled to meet client's request.}
-Derived classes must override this method to create requested
-art resource. This method is called only once per instance's
-lifetime for each requested wxArtID.
+\wxheading{Note}
+
+This is {\bf not} part of wxArtProvider's public API, use
+\helpref{wxArtProvider::GetBitmap}{wxartprovidergetbitmap} or
+\helpref{wxArtProvider::GetIcon}{wxartprovidergeticon}
+to query wxArtProvider for a resource.
\membersection{wxArtProvider::GetBitmap}\label{wxartprovidergetbitmap}
-\func{wxBitmap}{GetBitmap}{\param{const wxArtID\& }{id}, \param{const wxArtClient\& }{client = wxART\_OTHER}, \param{const wxSize\& }{size = wxDefaultSize}}
+\func{static wxBitmap}{GetBitmap}{\param{const wxArtID\& }{id}, \param{const wxArtClient\& }{client = wxART\_OTHER}, \param{const wxSize\& }{size = wxDefaultSize}}
+
+Query registered providers for bitmap with given ID.
+
+\wxheading{Parameters}
-Query the providers for bitmap with given ID and return it. Return
-wxNullBitmap if no provider provides it.
+\docparam{id}{wxArtID unique identifier of the bitmap.}
+
+\docparam{client}{wxArtClient identifier of the client (i.e. who is asking for the bitmap).}
+
+\docparam{size}{Size of the returned bitmap or {\tt wxDefaultSize} if size doesn't matter.}
+
+\wxheading{Return value}
+
+The bitmap if one of registered providers recognizes the ID or wxNullBitmap otherwise.
\membersection{wxArtProvider::GetIcon}\label{wxartprovidergeticon}
-\func{wxIcon}{GetIcon}{\param{const wxArtID\& }{id}, \param{const wxArtClient\& }{client = wxART\_OTHER}, \param{const wxSize\& }{size = wxDefaultSize}}
+\func{static wxIcon}{GetIcon}{\param{const wxArtID\& }{id}, \param{const wxArtClient\& }{client = wxART\_OTHER}, \param{const wxSize\& }{size = wxDefaultSize}}
+
+Same as \helpref{wxArtProvider::GetBitmap}{wxartprovidergetbitmap}, but
+return a wxIcon object (or wxNullIcon on failure).
+
+\func{static wxSize}{GetSizeHint}{\param{const wxArtClient\& }{client}, \param{bool }{platform\_default = false}}
-Query the providers for icon with given ID and return it. Return
-wxNullIcon if no provider provides it.
+Returns a suitable size hint for the given {\it wxArtClient}. If
+{\it platform\_default} is \true, return a size based on the current platform,
+otherwise return the size from the topmost wxArtProvider. {\it wxDefaultSize} may be
+returned if the client doesn't have a specified size, like wxART\_OTHER for example.
-\membersection{wxArtProvider::PopProvider}\label{wxartproviderpopprovider}
+\membersection{wxArtProvider::PopProvider}\label{wxartproviderctor}
-\func{bool}{PopProvider}{\void}
+\func{static bool}{PopProvider}{\void}
Remove latest added provider and delete it.
\membersection{wxArtProvider::PushProvider}\label{wxartproviderpushprovider}
-\func{void}{PushProvider}{\param{wxArtProvider* }{provider}}
+\func{static void}{PushProvider}{\param{wxArtProvider* }{provider}}
-Add new provider to the top of providers stack.
+Register new art provider (add it to the top of providers stack).
\membersection{wxArtProvider::RemoveProvider}\label{wxartproviderremoveprovider}
-\func{bool}{RemoveProvider}{\param{wxArtProvider* }{provider}}
+\func{static bool}{RemoveProvider}{\param{wxArtProvider* }{provider}}
-Remove provider. The provider must have been added previously.
-The provider is {\it not} deleted.
+Remove a provider from the stack. The provider must have been added previously
+and is {\it not} deleted.
projects / wxWidgets.git / blobdiff