ctrl.hxx

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#ifndef INCLUDED_VCL_CTRL_HXX
#define INCLUDED_VCL_CTRL_HXX

#include <rtl/ustring.hxx>
#include <tools/link.hxx>
#include <tools/gen.hxx>
#include <vcl/dllapi.h>
#include <vcl/window.hxx>
#include <optional>
#include <vector>

// forward
class StyleSettings;
class Control;

namespace vcl
{

struct VCL_DLLPUBLIC ControlLayoutData
{
    // contains the string really displayed
    // there must be exactly one bounding rectangle in m_aUnicodeBoundRects
    // for every character in m_aDisplayText
    OUString                            m_aDisplayText;
    // the bounding rectangle of every character
    // where one character may consist of many glyphs
    std::vector< tools::Rectangle >            m_aUnicodeBoundRects;
    // start indices of lines
    std::vector< tools::Long >                 m_aLineIndices;
    // notify parent control on destruction
    VclPtr<const Control>               m_pParent;

    ControlLayoutData();
    ~ControlLayoutData();

    tools::Rectangle GetCharacterBounds( tools::Long nIndex ) const;
    // returns the character index for corresponding to rPoint (in control coordinates)
    // -1 is returned if no character is at that point
    tools::Long GetIndexForPoint( const Point& rPoint ) const;
    // returns the number of lines in the result of GetDisplayText()
    tools::Long GetLineCount() const;
    // returns the interval [start,end] of line nLine
    // returns [-1,-1] for an invalid line
    ::Pair GetLineStartEnd( tools::Long nLine ) const;
    tools::Long ToRelativeLineIndex( tools::Long nIndex ) const;
};

} // namespace vcl

class VCL_DLLPUBLIC Control : public vcl::Window
{
protected:
    mutable std::optional<vcl::ControlLayoutData>  mxLayoutData;
    VclPtr<OutputDevice>        mpReferenceDevice;

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,
                               std::vector< tools::Rectangle >* _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( tools::Long nIndex ) const;
    // returns the character index for corresponding to rPoint (in control coordinates)
    // -1 is returned if no character is at that point
    tools::Long GetIndexForPoint( const Point& rPoint ) const;
    // returns the interval [start,end] of line nLine
    // returns [-1,-1] for an invalid line
    Pair GetLineStartEnd( tools::Long nLine ) const;
    tools::Long ToRelativeLineIndex( tools::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);

    void LogicMouseButtonDown(const MouseEvent& rMouseEvent) override;
    void LogicMouseButtonUp(const MouseEvent& rMouseEvent) override;
    void LogicMouseMove(const MouseEvent& rMouseEvent) override;
};

#endif // INCLUDED_VCL_CTRL_HXX

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