wxWidgets/interface/animate.h

/////////////////////////////////////////////////////////////////////////////
// Name:        animate.h
// Purpose:     interface of wxAnimation* classes
// Author:      wxWidgets team
// RCS-ID:      $Id$
// Licence:     wxWindows license
/////////////////////////////////////////////////////////////////////////////

/**
    Supported animation types.
*/
enum wxAnimationType
{
    wxANIMATION_TYPE_INVALID,

    /** represents an animated GIF file. */
    wxANIMATION_TYPE_GIF,

    /** represents an ANI file. */
    wxANIMATION_TYPE_ANI,

    /** autodetect the filetype. */
    wxANIMATION_TYPE_ANY
};

/**
    @class wxAnimationCtrl
    @wxheader{animate.h}

    This is a static control which displays an animation.
    wxAnimationCtrl API is as simple as possible and won't give you full control
    on the animation; if you need it then use wxMediaCtrl.

    This control is useful to display a (small) animation while doing a long task
    (e.g. a "throbber").

    It is only available if @c wxUSE_ANIMATIONCTRL is set to 1 (the default).

    @beginStyleTable
    @style{wxAC_DEFAULT_STYLE}:
           The default style: wxBORDER_NONE.
    @style{wxAC_NO_AUTORESIZE}:
           By default, the control will adjust its size to exactly fit to the
           size of the animation when SetAnimation is called. If this style
           flag is given, the control will not change its size
    @endStyleTable

    @library{wxadv}
    @category{ctrl}

    @nativeimpl{wxgtk,wxmsw}

    @appearance{animationctrl.png}

    @see wxAnimation
*/
class wxAnimationCtrl : public wxControl
{
public:
    /**
        Initializes the object and calls Create() with
        all the parameters.
    */
    wxAnimationCtrl(wxWindow* parent, wxWindowID id,
                    const wxAnimation& anim,
                    const wxPoint& pos = wxDefaultPosition,
                    const wxSize& size = wxDefaultSize,
                    long style = wxAC_DEFAULT_STYLE,
                    const wxString& name = "animationctrl");

    /**
        Creates the control with the given @a anim animation.
    
        After control creation you must explicitely call Play() to start to play
        the animation. Until that function won't be called, the first frame
        of the animation is displayed.
        
        @param parent
            Parent window, must be non-@NULL.
        @param id
            The identifier for the control.
        @param anim
            The initial animation shown in the control.
        @param pos
            Initial position.
        @param size
            Initial size.
        @param style
            The window style, see wxAC_* flags.
        @param name
            Control name.
        
        @returns @true if the control was successfully created or @false if
                 creation failed.
    */
    bool Create(wxWindow* parent, wxWindowID id,
                const wxAnimation& anim,
                const wxPoint& pos = wxDefaultPosition,
                const wxSize& size = wxDefaultSize,
                long style = wxAC_DEFAULT_STYLE,
                const wxString& name = "animationctrl");

    /**
        Returns the animation associated with this control.
    */
    wxAnimation GetAnimation() const;

    /**
        Returns the inactive bitmap shown in this control when the;
        see SetInactiveBitmap() for more info.
    */
    wxBitmap GetInactiveBitmap() const;

    /**
        Returns @true if the animation is being played.
    */
    bool IsPlaying() const;

    /**
        Loads the animation from the given file and calls SetAnimation().
        See wxAnimation::LoadFile for more info.
    */
    bool LoadFile(const wxString& file,
                  wxAnimationType animType = wxANIMATION_TYPE_ANY);

    /**
        Starts playing the animation.

        The animation is always played in loop mode (unless the last frame of the
        animation has an infinite delay time) and always start from the first frame
        even if you @ref Stop "stopped" it while some other frame was displayed.
    */
    bool Play();

    /**
        Sets the animation to play in this control.

        If the previous animation is being played, it's @ref Stop() stopped.
        Until Play() isn't called, a static image, the first frame of the given
        animation or the background colour will be shown
        (see SetInactiveBitmap() for more info).
    */
    void SetAnimation(const wxAnimation& anim);

    /**
        Sets the bitmap to show on the control when it's not playing an animation.

        If you set as inactive bitmap ::wxNullBitmap (which is the default), then the
        first frame of the animation is instead shown when the control is inactive;
        in this case, if there's no valid animation associated with the control
        (see SetAnimation()), then the background colour of the window is shown.

        If the control is not playing the animation, the given bitmap will be
        immediately shown, otherwise it will be shown as soon as Stop() is called.

        Note that the inactive bitmap, if smaller than the control's size, will be
        centered in the control; if bigger, it will be stretched to fit it.
    */
    void SetInactiveBitmap(const wxBitmap& bmp);

    /**
        Stops playing the animation.
        The control will show the first frame of the animation, a custom static image or
        the window's background colour as specified by the last SetInactiveBitmap() call.
    */
    void Stop();
};



/**
    @class wxAnimation
    @wxheader{animate.h}

    This class encapsulates the concept of a platform-dependent animation.
    An animation is a sequence of frames of the same size.
    Sound is not supported by wxAnimation.

    @library{wxadv}
    @category{gdi}

    @stdobjects
    ::wxNullAnimation

    @see wxAnimationCtrl
*/
class wxAnimation : public wxGDIObject
{
public:
    wxAnimation();
    wxAnimation(const wxAnimation& anim);

    /**
        Loads an animation from a file.
        
        @param name
            The name of the file to load.
        @param type
            See LoadFile for more info.
    */
    wxAnimation(const wxString& name,
                wxAnimationType type = wxANIMATION_TYPE_ANY);

    /**
        Destructor.
        See @ref overview_refcount_destruct for more info.
    */
    ~wxAnimation();

    /**
        Returns the delay for the i-th frame in milliseconds.
        If @c -1 is returned the frame is to be displayed forever.
    */
    int GetDelay(unsigned int i) const;

    /**
        Returns the i-th frame as a wxImage.
    */
    wxImage GetFrame(unsigned int i) const;

    /**
        Returns the number of frames for this animation.
    */
    unsigned int GetFrameCount() const;

    /**
        Returns the size of the animation.
    */
    wxSize GetSize() const;

    /**
        Returns @true if animation data is present.
    */
    bool IsOk() const;

    /**
        Loads an animation from the given stream.
        
        @param stream
            The stream to use to load the animation.
        @param type
            One of the following values:
             @li wxANIMATION_TYPE_GIF: loads an animated GIF file;
             @li wxANIMATION_TYPE_ANI: load an ANI file;
             @li wxANIMATION_TYPE_ANY: tries to autodetect the filetype.
        
        @returns @true if the operation succeeded, @false otherwise.
    */
    bool Load(wxInputStream& stream,
              wxAnimationType type = wxANIMATION_TYPE_ANY);

    /**
        Loads an animation from a file.
        
        @param name
            A filename.
        @param type
            One of the wxAnimationType values; wxANIMATION_TYPE_ANY
            means that the function should try to autodetect the filetype.
        
        @returns @true if the operation succeeded, @false otherwise.
    */
    bool LoadFile(const wxString& name,
                  wxAnimationType type = wxANIMATION_TYPE_ANY);

    /**
        Assignment operator, using @ref overview_refcount "reference counting".
    */
    wxAnimation operator =(const wxAnimation& brush);
};


// ============================================================================
// Global functions/macros
// ============================================================================

/**
    An empty animation object.
*/
wxAnimation wxNullAnimation;