wxWidgets/interface/wx/imaglist.h

/////////////////////////////////////////////////////////////////////////////
// Name:        imaglist.h
// Purpose:     interface of wxImageList
// Author:      wxWidgets team
// RCS-ID:      $Id$
// Licence:     wxWindows license
/////////////////////////////////////////////////////////////////////////////

/**
    @class wxImageList

    A wxImageList contains a list of images, which are stored in
    an unspecified form. Images can have masks for transparent
    drawing, and can be made from a variety of sources including bitmaps
    and icons.

    wxImageList is used principally in conjunction with wxTreeCtrl and
    wxListCtrl classes.

    @library{wxcore}
    @category{gdi}

    @see wxTreeCtrl, wxListCtrl
*/
class wxImageList : public wxObject
{
public:
    //@{
    /**
        Constructor specifying the image size, whether image masks should be created,
        and the initial size of the list.

        @param width
            Width of the images in the list.
        @param height
            Height of the images in the list.
        @param mask
            @true if masks should be created for all images.
        @param initialCount
            The initial size of the list.

        @see Create()
    */
    wxImageList();
    wxImageList(int width, int height, bool mask = true,
                int initialCount = 1);
    //@}

    //@{
    /**
        Adds a new image using an icon.

        @param bitmap
            Bitmap representing the opaque areas of the image.
        @param mask
            Monochrome mask bitmap, representing the transparent areas of the image.
        @param maskColour
            Colour indicating which parts of the image are transparent.
        @param icon
            Icon to use as the image.

        @return The new zero-based image index.

        @remarks The original bitmap or icon is not affected by the Add
                 operation, and can be deleted afterwards.
    */
    int Add(const wxBitmap& bitmap,
            const wxBitmap& mask = wxNullBitmap);
    int Add(const wxBitmap& bitmap, const wxColour& maskColour);
    int Add(const wxIcon& icon);
    //@}

    /**
        Initializes the list. See wxImageList() for details.
    */
    bool Create(int width, int height, bool mask = true,
                int initialCount = 1);

    /**
        Draws a specified image onto a device context.

        @param index
            Image index, starting from zero.
        @param dc
            Device context to draw on.
        @param x
            X position on the device context.
        @param y
            Y position on the device context.
        @param flags
            How to draw the image. A bitlist of a selection of the following:






            wxIMAGELIST_DRAW_NORMAL




            Draw the image normally.





            wxIMAGELIST_DRAW_TRANSPARENT




            Draw the image with transparency.





            wxIMAGELIST_DRAW_SELECTED




            Draw the image in selected state.





            wxIMAGELIST_DRAW_FOCUSED




            Draw the image in a focused state.
        @param solidBackground
            For optimisation - drawing can be faster if the function is told
            that the background is solid.
    */
    virtual bool Draw(int index, wxDC& dc, int x, int y,
                      int flags = wxIMAGELIST_DRAW_NORMAL,
                      bool solidBackground = false);

    /**
        Returns the bitmap corresponding to the given index.
    */
    wxBitmap GetBitmap(int index) const;

    /**
        Returns the icon corresponding to the given index.
    */
    wxIcon GetIcon(int index) const;

    /**
        Returns the number of images in the list.
    */
    virtual int GetImageCount() const;

    /**
        Retrieves the size of the images in the list. Currently, the @a index
        parameter is ignored as all images in the list have the same size.

        @param index
            currently unused, should be 0
        @param width
            receives the width of the images in the list
        @param height
            receives the height of the images in the list

        @return @true if the function succeeded, @false if it failed (for example,
                 if the image list was not yet initialized).
    */
    virtual bool GetSize(int index, int& width, int& height) const;

    /**
        Removes the image at the given position.
    */
    bool Remove(int index);

    /**
        Removes all the images in the list.
    */
    bool RemoveAll();

    //@{
    /**
        Replaces the existing image with the new image.

        @param bitmap
            Bitmap representing the opaque areas of the image.
        @param mask
            Monochrome mask bitmap, representing the transparent areas of the image.
        @param icon
            Icon to use as the image.

        @return @true if the replacement was successful, @false otherwise.

        @remarks The original bitmap or icon is not affected by the Replace
                 operation, and can be deleted afterwards.
    */
    bool Replace(int index, const wxBitmap& bitmap,
                 const wxBitmap& mask = wxNullBitmap);
    bool Replace(int index, const wxIcon& icon);
    //@}
};