ctrl.hxx

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#ifndef INCLUDED_VCL_CTRL_HXX
#define INCLUDED_VCL_CTRL_HXX

#include <tools/link.hxx>
#include <vcl/dllapi.h>
#include <vcl/window.hxx>
#include <memory>

// forward
namespace vcl { struct ImplControlData; }
class StyleSettings;


class VCL_DLLPUBLIC Control : public vcl::Window
{
protected:
    std::unique_ptr<vcl::ImplControlData> mpControlData;

private:
    bool                    mbHasControlFocus;
    bool                    mbShowAccelerator;
    Link<Control&,void>     maLoseFocusHdl;

    SAL_DLLPRIVATE void     ImplInitControlData();

                            Control (const Control &) = delete;
                            Control & operator= (const Control &) = delete;

protected:
                    Control( WindowType nType );
    virtual void    FillLayoutData() const;

    // helper method for composite controls
    void            AppendLayoutData( const Control& rSubControl ) const;

    void            CreateLayoutData() const;
    bool            HasLayoutData() const;

    bool        ImplCallEventListenersAndHandler(
                    VclEventId nEvent, std::function<void()> const & callHandler
                );

    void        CallEventListeners( VclEventId nEvent, void* pData = nullptr );

    tools::Rectangle DrawControlText( OutputDevice& _rTargetDevice, const tools::Rectangle& _rRect,
                               const OUString& _rStr, DrawTextFlags _nStyle,
                               MetricVector* _pVector, OUString* _pDisplayText,
                               const Size* i_pDeviceSize = nullptr ) const;

    tools::Rectangle GetControlTextRect( OutputDevice& _rTargetDevice, const tools::Rectangle & rRect,
                                  const OUString& _rStr, DrawTextFlags _nStyle,
                                  Size* o_pDeviceSize = nullptr ) const;

    virtual const vcl::Font&
                GetCanonicalFont( const StyleSettings& _rStyle ) const;
    virtual const Color&
                GetCanonicalTextColor( const StyleSettings& _rStyle ) const;

    void ImplInitSettings();

    virtual void ApplySettings(vcl::RenderContext& rRenderContext) override;

public:
    SAL_DLLPRIVATE void ImplClearLayoutData() const;
    SAL_DLLPRIVATE void ImplDrawFrame( OutputDevice* pDev, tools::Rectangle& rRect );

public:
    explicit        Control( vcl::Window* pParent, WinBits nWinStyle = 0 );
    virtual         ~Control() override;
    virtual void    dispose() override;

    virtual void    EnableRTL ( bool bEnable = true ) override;

    virtual bool    EventNotify( NotifyEvent& rNEvt ) override;
    virtual void    StateChanged( StateChangedType nStateChange ) override;
    virtual void    Resize() override;

    // invalidates layout data
    virtual void    SetText( const OUString& rStr ) override;
    // gets the displayed text
    virtual OUString GetDisplayText() const override;
    // returns the bounding box for the character at index nIndex (in control coordinates)
    tools::Rectangle GetCharacterBounds( long nIndex ) const;
    // returns the character index for corresponding to rPoint (in control coordinates)
    // -1 is returned if no character is at that point
    long GetIndexForPoint( const Point& rPoint ) const;
    // returns the interval [start,end] of line nLine
    // returns [-1,-1] for an invalid line
    Pair GetLineStartEnd( long nLine ) const;
    long ToRelativeLineIndex( long nIndex ) const;

    void            SetLoseFocusHdl( const Link<Control&,void>& rLink ) { maLoseFocusHdl = rLink; }

    bool            HasControlFocus() const { return mbHasControlFocus; }

    void            SetLayoutDataParent( const Control* pParent ) const;

    virtual Size    GetOptimalSize() const override;

    void            SetReferenceDevice( OutputDevice* _referenceDevice );
    OutputDevice*   GetReferenceDevice() const;

    vcl::Font       GetUnzoomedControlPointFont() const;
    void            SetShowAccelerator (bool val);
};

#endif // INCLUDED_VCL_CTRL_HXX

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