///////////////////////////////////////////////////////////////////////////// // Name: artprov.h // Purpose: interface of wxArtProvider // Author: wxWidgets team // RCS-ID: $Id$ // Licence: wxWindows license ///////////////////////////////////////////////////////////////////////////// /** @class wxArtProvider 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 either its wxArtProvider::CreateBitmap() and/or its wxArtProvider::CreateIconBundle() methods and register the provider with wxArtProvider::Push(): @code class MyProvider : public wxArtProvider { protected: wxBitmap CreateBitmap(const wxArtID& id, const wxArtClient& client, const wxSize size) // optionally override this one as well wxIconBundle CreateIconBundle(const wxArtID& id, const wxArtClient& client) { ... } }; ... wxArtProvider::Push(new MyProvider); @endcode If you need bitmap images (of the same artwork) that should be displayed at different sizes you should probably consider overriding wxArtProvider::CreateIconBundle and supplying icon bundles that contain different bitmap sizes. 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 wxArtProvider::GetBitmap or wxArtProvider::GetIcon. @todo IS THIS NB TRUE? (@note this is not yet really possible as of wxWidgets 2.3.3, the set of wxArtProvider bitmaps is too small). @section artprovider_identify Identifying art resources Every bitmap and icon bundle are known to wxArtProvider under an unique ID that is used 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 @ref page_samples_artprov):
@li wxART_ERROR @li wxART_QUESTION @li wxART_WARNING @li wxART_INFORMATION @li wxART_ADD_BOOKMARK @li wxART_DEL_BOOKMARK @li wxART_HELP_SIDE_PANEL @li wxART_HELP_SETTINGS @li wxART_HELP_BOOK @li wxART_HELP_FOLDER @li wxART_HELP_PAGE @li wxART_GO_BACK @li wxART_GO_FORWARD @li wxART_GO_UP @li wxART_GO_DOWN @li wxART_GO_TO_PARENT @li wxART_GO_HOME @li wxART_PRINT @li wxART_HELP @li wxART_TIP @li wxART_REPORT_VIEW @li wxART_LIST_VIEW @li wxART_NEW_DIR @li wxART_FOLDER @li wxART_FOLDER_OPEN @li wxART_GO_DIR_UP @li wxART_EXECUTABLE_FILE @li wxART_NORMAL_FILE @li wxART_TICK_MARK @li wxART_CROSS_MARK @li wxART_MISSING_IMAGE @li wxART_NEW @li wxART_FILE_OPEN @li wxART_FILE_SAVE @li wxART_FILE_SAVE_AS @li wxART_DELETE @li wxART_COPY @li wxART_CUT @li wxART_PASTE @li wxART_UNDO @li wxART_REDO @li wxART_QUIT @li wxART_FIND @li wxART_FIND_AND_REPLACE @li wxART_HARDDISK @li wxART_FLOPPY @li wxART_CDROM @li wxART_REMOVABLE
Additionally, any string recognized by custom art providers registered using wxArtProvider::Push may be used. @note When running under GTK+ 2, GTK+ stock item IDs (e.g. @c "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 freedesktop.org Icon Themes specification (see http://freedesktop.org/Standards/icon-theme-spec). Note that themes are not guaranteed to contain all icons, so wxArtProvider may return ::wxNullBitmap or ::wxNullIcon. The default theme is typically installed in @c /usr/share/icons/hicolor. @section artprovider_clients Clients 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: @li wxART_TOOLBAR @li wxART_MENU @li wxART_BUTTON @li wxART_FRAME_ICON @li wxART_CMN_DIALOG @li wxART_HELP_BROWSER @li wxART_MESSAGE_BOX @li wxART_OTHER (used for all requests that don't fit into any of the categories above) 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. wxART_FILE_OPEN). Remember that this is really only a hint for wxArtProvider -- it is common that wxArtProvider::GetBitmap returns identical bitmap for different client values! @library{wxcore} @category{misc,data} @see the @ref page_samples_artprov for an example of wxArtProvider usage. */ class wxArtProvider : public wxObject { public: /** The destructor automatically removes the provider from the provider stack used by GetBitmap(). */ virtual ~wxArtProvider(); /** Delete the given @a provider. */ static bool Delete(wxArtProvider* provider); /** Query registered providers for bitmap with given ID. @param id wxArtID unique identifier of the bitmap. @param client wxArtClient identifier of the client (i.e. who is asking for the bitmap). @param size Size of the returned bitmap or wxDefaultSize if size doesn't matter. @return The bitmap if one of registered providers recognizes the ID or wxNullBitmap otherwise. */ static wxBitmap GetBitmap(const wxArtID& id, const wxArtClient& client = wxART_OTHER, const wxSize& size = wxDefaultSize); /** Same as wxArtProvider::GetBitmap, but return a wxIcon object (or ::wxNullIcon on failure). */ static wxIcon GetIcon(const wxArtID& id, const wxArtClient& client = wxART_OTHER, const wxSize& size = wxDefaultSize); /** Returns native icon size for use specified by @a client hint. If the platform has no commonly used default for this use or if @a client is not recognized, returns wxDefaultSize. @note In some cases, a platform may have @em several appropriate native sizes (for example, wxART_FRAME_ICON for frame icons). In that case, this method returns only one of them, picked reasonably. @since 2.9.0 */ static wxSize GetNativeSizeHint(const wxArtClient& client); /** Returns a suitable size hint for the given @e wxArtClient. If @a platform_default is @true, return a size based on the current platform using GetNativeSizeHint(), otherwise return the size from the topmost wxArtProvider. @e wxDefaultSize may be returned if the client doesn't have a specified size, like wxART_OTHER for example. @see GetNativeSizeHint() */ static wxSize GetSizeHint(const wxArtClient& client, bool platform_default = false); /** Query registered providers for icon bundle with given ID. @param id wxArtID unique identifier of the icon bundle. @param client wxArtClient identifier of the client (i.e. who is asking for the icon bundle). @return The icon bundle if one of registered providers recognizes the ID or wxNullIconBundle otherwise. */ static wxIconBundle GetIconBundle(const wxArtID& id, const wxArtClient& client = wxART_OTHER); /** Returns true if the platform uses native icons provider that should take precedence over any customizations. This is true for any platform that has user-customizable icon themes, currently only wxGTK. A typical use for this method is to decide whether a custom art provider should be plugged in using Push() or PushBack(). @since 2.9.0 */ static bool HasNativeProvider(); /** @deprecated Use PushBack() instead. */ static void Insert(wxArtProvider* provider); /** Remove latest added provider and delete it. */ static bool Pop(); /** Register new art provider and add it to the top of providers stack (i.e. it will be queried as the first provider). @see PushBack() */ static void Push(wxArtProvider* provider); /** Register new art provider and add it to the bottom of providers stack. In other words, it will be queried as the last one, after all others, including the default provider. @see Push() @since 2.9.0 */ static void PushBack(wxArtProvider* provider); /** Remove a provider from the stack if it is on it. The provider is not deleted, unlike when using Delete(). */ static bool Remove(wxArtProvider* provider); protected: /** 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). @param id wxArtID unique identifier of the bitmap. @param client wxArtClient identifier of the client (i.e. who is asking for the bitmap). This only servers as a hint. @param 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. @note This is not part of wxArtProvider's public API, use wxArtProvider::GetBitmap or wxArtProvider::GetIconBundle or wxArtProvider::GetIcon to query wxArtProvider for a resource. @see CreateIconBundle() */ virtual wxBitmap CreateBitmap(const wxArtID& id, const wxArtClient& client, const wxSize& size); /** This method is similar to CreateBitmap() but can be used when a bitmap (or an icon) exists in several sizes. */ virtual wxIconBundle CreateIconBundle(const wxArtID& id, const wxArtClient& client); };