// Copyright 2014 PDFium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com

#ifndef _FWL_SCROLLBAR_IMP_H
#define _FWL_SCROLLBAR_IMP_H
class CFWL_WidgetImp;
class CFWL_WidgetImpProperties;
class CFWL_WidgetImpDelegate;
class IFWL_Widget;
class IFWL_Timer;
class IFWL_TimerDelegate;
class CFWL_ScrollBarImp;
class CFWL_ScrollBarImpDelegate;
class CFWL_ScrollBarImp : public CFWL_WidgetImp, public IFWL_Timer
{
public:
    CFWL_ScrollBarImp(IFWL_Widget *pOuter = NULL);
    CFWL_ScrollBarImp(const CFWL_WidgetImpProperties &properties, IFWL_Widget *pOuter = NULL);
    ~CFWL_ScrollBarImp();
    virtual FWL_ERR		GetClassName(CFX_WideString &wsClass) const;
    virtual FX_DWORD	GetClassID() const;
    virtual FWL_ERR		Initialize();
    virtual FWL_ERR     Finalize();
    virtual FWL_ERR		GetWidgetRect(CFX_RectF &rect, FX_BOOL bAutoSize = FALSE);
    virtual	FWL_ERR		Update();
    virtual FWL_ERR		DrawWidget(CFX_Graphics *pGraphics, const CFX_Matrix *pMatrix = NULL);
    virtual FX_BOOL		IsVertical() ;
    virtual FWL_ERR		GetRange(FX_FLOAT &fMin, FX_FLOAT &fMax);
    virtual FWL_ERR		SetRange(FX_FLOAT fMin, FX_FLOAT fMax);
    virtual FX_FLOAT	GetPageSize();
    virtual FWL_ERR		SetPageSize(FX_FLOAT fPageSize);
    virtual FX_FLOAT	GetStepSize();
    virtual FWL_ERR		SetStepSize(FX_FLOAT fStepSize);
    virtual FX_FLOAT	GetPos();
    virtual FWL_ERR		SetPos(FX_FLOAT fPos);
    virtual FX_FLOAT	GetTrackPos();
    virtual FWL_ERR		SetTrackPos(FX_FLOAT fTrackPos);
    virtual FX_BOOL		DoScroll(FX_DWORD dwCode, FX_FLOAT fPos = 0.0f);
    virtual	FWL_ERR		SetOuter(IFWL_Widget *pOuter);
    virtual	FX_INT32	Run(FWL_HTIMER hTimer);
protected:
    void		DrawTrack(CFX_Graphics *pGraphics, IFWL_ThemeProvider *pTheme, FX_BOOL bLower = TRUE, const CFX_Matrix *pMatrix = NULL);
    void		DrawArrowBtn(CFX_Graphics *pGraphics, IFWL_ThemeProvider *pTheme, FX_BOOL bMinBtn = TRUE, const CFX_Matrix *pMatrix = NULL);
    void		DrawThumb(CFX_Graphics *pGraphics, IFWL_ThemeProvider *pTheme, const CFX_Matrix *pMatrix = NULL);
    void		Layout();
    void		CalcButtonLen();
    void		CalcMinButtonRect(CFX_RectF &rect);
    void		CalcMaxButtonRect(CFX_RectF &rect);
    void		CalcThumbButtonRect(CFX_RectF &rect);
    void		CalcMinTrackRect(CFX_RectF &rect);
    void		CalcMaxTrackRect(CFX_RectF &rect);

    FX_FLOAT	GetTrackPointPos(FX_FLOAT fx, FX_FLOAT fy);
    void		GetTrackRect(CFX_RectF &rect, FX_BOOL bLower = TRUE);
    FX_BOOL		SendEvent();
    FX_BOOL		OnScroll(FX_DWORD dwCode, FX_FLOAT fPos);
    FWL_HTIMER				m_hTimer;
    FX_FLOAT				m_fRangeMin;
    FX_FLOAT				m_fRangeMax;
    FX_FLOAT				m_fPageSize;
    FX_FLOAT				m_fStepSize;
    FX_FLOAT				m_fPos;
    FX_FLOAT				m_fTrackPos;
    FX_INT32				m_iMinButtonState;
    FX_INT32				m_iMaxButtonState;
    FX_INT32				m_iThumbButtonState;
    FX_INT32				m_iMinTrackState;
    FX_INT32				m_iMaxTrackState;
    FX_FLOAT				m_fLastTrackPos;
    FX_FLOAT				m_cpTrackPointX;
    FX_FLOAT				m_cpTrackPointY;
    FX_INT32				m_iMouseWheel;
    FX_BOOL					m_bTrackMouseLeave;
    FX_BOOL					m_bMouseHover;
    FX_BOOL					m_bMouseDown;
    FX_BOOL					m_bRepaintThumb;

    FX_FLOAT				m_fButtonLen;
    FX_BOOL					m_bMinSize;
    CFX_RectF				m_rtClient;
    CFX_RectF				m_rtThumb;
    CFX_RectF				m_rtMinBtn;
    CFX_RectF				m_rtMaxBtn;
    CFX_RectF				m_rtMinTrack;
    CFX_RectF				m_rtMaxTrack;
    FX_BOOL					m_bCustomLayout;
    FX_FLOAT				m_fMinThumb;
    friend class CFWL_ScrollBarImpDelegate;
};
class CFWL_ScrollBarImpDelegate : public CFWL_WidgetImpDelegate
{
public:
    CFWL_ScrollBarImpDelegate(CFWL_ScrollBarImp *pOwner);
    virtual FX_INT32	OnProcessMessage(CFWL_Message *pMessage);
    virtual FWL_ERR		OnDrawWidget(CFX_Graphics *pGraphics, const CFX_Matrix *pMatrix = NULL);
protected:
    void		OnLButtonDown(FX_DWORD dwFlags, FX_FLOAT fx, FX_FLOAT fy);
    void		OnLButtonUp(FX_DWORD dwFlags, FX_FLOAT fx, FX_FLOAT fy);
    void		OnMouseMove(FX_DWORD dwFlags, FX_FLOAT fx, FX_FLOAT fy);
    void		OnMouseLeave();
    void		OnMouseWheel(FX_FLOAT fx, FX_FLOAT fy, FX_DWORD	dwFlags, FX_FLOAT fDeltaX, FX_FLOAT	fDeltaY);
    void		DoMouseDown(FX_INT32 iItem, const CFX_RectF &rtItem, FX_INT32 &iState, FX_FLOAT fx, FX_FLOAT fy);
    void		DoMouseUp(FX_INT32 iItem, const CFX_RectF &rtItem, FX_INT32 &iState, FX_FLOAT fx, FX_FLOAT fy);
    void		DoMouseMove(FX_INT32 iItem, const CFX_RectF &rtItem, FX_INT32 &iState, FX_FLOAT fx, FX_FLOAT fy);
    void		DoMouseLeave(FX_INT32 iItem, const CFX_RectF &rtItem, FX_INT32 &iState);
    void		DoMouseHover(FX_INT32 iItem, const CFX_RectF &rtItem, FX_INT32 &iState);

    CFWL_ScrollBarImp *m_pOwner;
};
#endif