40ca944974
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@33435 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
205 lines
7.8 KiB
TeX
205 lines
7.8 KiB
TeX
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% automatically generated by HelpGen $Revision$ from
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% artprov.h at 08/Apr/02 17:44:57
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\section{\class{wxArtProvider}}\label{wxartprovider}
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wxArtProvider class is used to customize the look of wxWidgets application.
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When wxWidgets needs to display an icon or a bitmap (e.g. in the standard file
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dialog), it does not use a hard-coded resource but asks wxArtProvider for it
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instead. This way users can plug in their own wxArtProvider class and easily
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replace standard art with their own version. All
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that is needed is to derive a class from wxArtProvider, override its
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\helpref{CreateBitmap}{wxartprovidercreatebitmap} method and register the
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provider with
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\helpref{wxArtProvider::PushProvider}{wxartproviderpushprovider}:
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\begin{verbatim}
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class MyProvider : public wxArtProvider
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{
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protected:
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wxBitmap CreateBitmap(const wxArtID& id,
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const wxArtClient& client,
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const wxSize size)
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{ ... }
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};
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...
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wxArtProvider::PushProvider(new MyProvider);
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\end{verbatim}
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There's another way of taking advantage of this class: you can use it in your code and use
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platform native icons as provided by \helpref{wxArtProvider::GetBitmap}{wxartprovidergetbitmap} or
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\helpref{wxArtProvider::GetIcon}{wxartprovidergeticon} (NB: this is not yet really
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possible as of wxWidgets 2.3.3, the set of wxArtProvider bitmaps is too
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small).
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\membersection{Identifying art resources}\label{artprovideridentifying}
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Every bitmap is known to wxArtProvider under an unique ID that is used by when
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requesting a resource from it. The ID is represented by wxArtID type and can
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have one of these predefined values (you can see bitmaps represented by these
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constants in the \helpref{artprov}{sampleartprovider} sample):
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\begin{itemize}\itemsep=0pt
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\item wxART\_ADD\_BOOKMARK
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\item wxART\_DEL\_BOOKMARK
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\item wxART\_HELP\_SIDE\_PANEL
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\item wxART\_HELP\_SETTINGS
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\item wxART\_HELP\_BOOK
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\item wxART\_HELP\_FOLDER
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\item wxART\_HELP\_PAGE
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\item wxART\_GO\_BACK
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\item wxART\_GO\_FORWARD
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\item wxART\_GO\_UP
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\item wxART\_GO\_DOWN
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\item wxART\_GO\_TO\_PARENT
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\item wxART\_GO\_HOME
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\item wxART\_FILE\_OPEN
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\item wxART\_PRINT
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\item wxART\_HELP
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\item wxART\_TIP
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\item wxART\_REPORT\_VIEW
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\item wxART\_LIST\_VIEW
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\item wxART\_NEW\_DIR
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\item wxART\_FOLDER
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\item wxART\_GO\_DIR\_UP
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\item wxART\_EXECUTABLE\_FILE
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\item wxART\_NORMAL\_FILE
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\item wxART\_TICK\_MARK
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\item wxART\_CROSS\_MARK
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\item wxART\_ERROR
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\item wxART\_QUESTION
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\item wxART\_WARNING
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\item wxART\_INFORMATION
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\item wxART\_MISSING\_IMAGE
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\end{itemize}
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Additionally, any string recognized by custom art providers registered using
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\helpref{PushProvider}{wxartproviderpushprovider} may be used.
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\wxheading{GTK+ Note}
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When running under GTK+ 2, GTK+ stock item IDs (e.g. {\tt "gtk-cdrom"}) may
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be used as well. Additionally, if wxGTK was compiled against GTK+ >= 2.4, then
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it is also possible to load icons from current icon theme by specifying their
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name (without extension and directory components). Icon themes recognized
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by GTK+ follow the
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\urlref{freedesktop.org Icon Themes specification}{http://freedesktop.org/Standards/icon-theme-spec}. Note that themes are not guaranteed to contain all
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icons, so wxArtProvider may return {\tt wxNullBitmap} or {\tt wxNullIcon}.
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Default theme is typically installed in {\tt /usr/share/icons/hicolor}.
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\membersection{Clients}\label{artproviderclients}
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Client is the entity that calls wxArtProvider's GetBitmap or GetIcon
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function. It is represented by wxClientID type and can have one of these
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values:
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\begin{itemize}\itemsep=0pt
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\item wxART\_TOOLBAR
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\item wxART\_MENU
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\item wxART\_BUTTON
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\item wxART\_FRAME\_ICON
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\item wxART\_CMN\_DIALOG
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\item wxART\_HELP\_BROWSER
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\item wxART\_MESSAGE\_BOX
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\item wxART\_OTHER (used for all requests that don't fit into any of the categories above)
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\end{itemize}
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Client ID servers as a hint to wxArtProvider that is supposed to help it to
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choose the best looking bitmap. For example it is often desirable to use
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slightly different icons in menus and toolbars even though they represent the
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same action (e.g. {\tt wx\_ART\_FILE\_OPEN}). Remember that this is really
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only a hint for wxArtProvider -- it is common that
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\helpref{wxArtProvider::GetBitmap}{wxartprovidergetbitmap}
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returns identical bitmap for different {\it client} values!
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\wxheading{See also}
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See the \helpref{artprov}{sampleartprovider} sample for an example of wxArtProvider usage.
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\wxheading{Derived from}
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\helpref{wxObject}{wxobject}
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\wxheading{Include files}
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<wx/artprov.h>
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\latexignore{\rtfignore{\wxheading{Members}}}
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\membersection{wxArtProvider::CreateBitmap}\label{wxartprovidercreatebitmap}
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\func{wxBitmap}{CreateBitmap}{\param{const wxArtID\& }{id}, \param{const wxArtClient\& }{client}, \param{const wxSize\& }{size}}
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Derived art provider classes must override this method to create requested
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art resource. Note that returned bitmaps are cached by wxArtProvider and it is therefore
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not necessary to optimize CreateBitmap for speed (e.g. you may create wxBitmap objects
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from XPMs here).
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\wxheading{Parameters}
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\docparam{id}{wxArtID unique identifier of the bitmap.}
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\docparam{client}{wxArtClient identifier of the client (i.e. who is asking for the bitmap).
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This only servers as a hint.}
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\docparam{size}{Preferred size of the bitmap. The function may return a bitmap of different
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dimensions, it will be automatically rescaled to meet client's request.}
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\wxheading{Note}
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This is {\bf not} part of wxArtProvider's public API, use
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\helpref{wxArtProvider::GetBitmap}{wxartprovidergetbitmap} or
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\helpref{wxArtProvider::GetIcon}{wxartprovidergeticon}
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to query wxArtProvider for a resource.
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\membersection{wxArtProvider::GetBitmap}\label{wxartprovidergetbitmap}
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\func{static wxBitmap}{GetBitmap}{\param{const wxArtID\& }{id}, \param{const wxArtClient\& }{client = wxART\_OTHER}, \param{const wxSize\& }{size = wxDefaultSize}}
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Query registered providers for bitmap with given ID.
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\wxheading{Parameters}
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\docparam{id}{wxArtID unique identifier of the bitmap.}
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\docparam{client}{wxArtClient identifier of the client (i.e. who is asking for the bitmap).}
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\docparam{size}{Size of the returned bitmap or {\tt wxDefaultSize} if size doesn't matter.}
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\wxheading{Return value}
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The bitmap if one of registered providers recognizes the ID or wxNullBitmap otherwise.
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\membersection{wxArtProvider::GetIcon}\label{wxartprovidergeticon}
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\func{static wxIcon}{GetIcon}{\param{const wxArtID\& }{id}, \param{const wxArtClient\& }{client = wxART\_OTHER}, \param{const wxSize\& }{size = wxDefaultSize}}
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Same as \helpref{wxArtProvider::GetBitmap}{wxartprovidergetbitmap}, but
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return a wxIcon object (or wxNullIcon on failure).
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\func{static wxSize}{GetSizeHint}{\param{const wxArtClient\& }{client}, \param{bool }{platform\_default = false}}
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Returns a suitable size hint for the given {\it wxArtClient}. If
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{\it platform\_default} is \true, return a size based on the current platform,
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otherwise return the size from the topmost wxArtProvider. {\it wxDefaultSize} may be
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returned if the client doesn't have a specified size, like wxART\_OTHER for example.
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\membersection{wxArtProvider::PopProvider}\label{wxartproviderctor}
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\func{static bool}{PopProvider}{\void}
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Remove latest added provider and delete it.
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\membersection{wxArtProvider::PushProvider}\label{wxartproviderpushprovider}
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\func{static void}{PushProvider}{\param{wxArtProvider* }{provider}}
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Register new art provider (add it to the top of providers stack).
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\membersection{wxArtProvider::RemoveProvider}\label{wxartproviderremoveprovider}
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\func{static bool}{RemoveProvider}{\param{wxArtProvider* }{provider}}
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Remove a provider from the stack. The provider must have been added previously
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and is {\it not} deleted.
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