wall.hxx

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#ifndef INCLUDED_VCL_WALL_HXX
#define INCLUDED_VCL_WALL_HXX

#include <tools/color.hxx>
#include <tools/gen.hxx>
#include <vcl/bitmapex.hxx>
#include <vcl/gradient.hxx>
#include <vcl/dllapi.h>
#include <optional>

class Gradient;
class BitmapEx;
class ImplWallpaper;

enum class WallpaperStyle
{
    NONE,
    Tile,
    Center,
    Scale,
    TopLeft,
    Top,
    TopRight,
    Left,
    Right,
    BottomLeft,
    Bottom,
    BottomRight,
    ApplicationGradient          // defines a gradient that internally covers the whole application
                                 // and uses a color derived from the face color
};

class VCL_DLLPUBLIC Wallpaper
{
public:
    SAL_DLLPRIVATE void             ImplSetCachedBitmap( BitmapEx& rBmp ) const;
    SAL_DLLPRIVATE const BitmapEx*  ImplGetCachedBitmap() const;
    SAL_DLLPRIVATE void             ImplReleaseCachedBitmap() const;

private:
    SAL_DLLPRIVATE static Gradient  ImplGetApplicationGradient();

public:
                    Wallpaper();
                    Wallpaper( const Wallpaper& rWallpaper );
                    Wallpaper( Wallpaper&& rWallpaper );
                    Wallpaper( const Color& rColor );
                    explicit Wallpaper( const BitmapEx& rBmpEx );
                    ~Wallpaper();

    void            SetColor( const Color& rColor );
    const Color&    GetColor() const { return maColor; }

    void            SetStyle( WallpaperStyle eStyle );
    WallpaperStyle  GetStyle() const { return meStyle; }

    void            SetBitmap( const BitmapEx& rBitmap );
    const BitmapEx & GetBitmap() const;
    bool            IsBitmap() const;

    void            SetGradient( const Gradient& rGradient );
    Gradient        GetGradient() const;
    bool            IsGradient() const;

    void            SetRect( const tools::Rectangle& rRect ) { maRect = rRect; }
    const tools::Rectangle & GetRect() const { return maRect; }
    bool            IsRect() const;

    bool            IsFixed() const;
    bool            IsScrollable() const;

    Wallpaper&      operator=( const Wallpaper& rWallpaper );
    Wallpaper&      operator=( Wallpaper&& rWallpaper );

    bool            operator==( const Wallpaper& rWallpaper ) const;
    bool            operator!=( const Wallpaper& rWallpaper ) const
                        { return !(Wallpaper::operator==( rWallpaper )); }

    bool            IsEmpty() const
    {
        return GetStyle() == WallpaperStyle::NONE && GetColor() == COL_TRANSPARENT &&
               !IsBitmap() && !IsGradient() && !IsRect();
    }

    friend SvStream& ReadWallpaper( SvStream& rIStm, Wallpaper& rWallpaper );
    friend SvStream& WriteWallpaper( SvStream& rOStm, const Wallpaper& rWallpaper );
private:
    tools::Rectangle            maRect;
    BitmapEx                    maBitmap;
    mutable BitmapEx            maCache;
    std::optional<Gradient>     mpGradient;
    Color                       maColor;
    WallpaperStyle              meStyle;
};

#endif // INCLUDED_VCL_WALL_HXX

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