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      1 // Copyright 2014 PDFium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
      6 
      7 #ifndef FPDFSDK_INCLUDE_PDFWINDOW_PWL_SCROLLBAR_H_
      8 #define FPDFSDK_INCLUDE_PDFWINDOW_PWL_SCROLLBAR_H_
      9 
     10 #include "PWL_Wnd.h"
     11 
     12 class CPWL_SBButton;
     13 class CPWL_ScrollBar;
     14 
     15 struct PWL_SCROLL_INFO
     16 {
     17 public:
     18 	PWL_SCROLL_INFO() : fContentMin(0.0f), fContentMax(0.0f), fPlateWidth(0.0f), fBigStep(0.0f), fSmallStep(0.0f)
     19 	{
     20 	}
     21 	FX_FLOAT					fContentMin;
     22 	FX_FLOAT					fContentMax;
     23 	FX_FLOAT					fPlateWidth;
     24 	FX_FLOAT					fBigStep;
     25 	FX_FLOAT					fSmallStep;
     26 };
     27 
     28 enum PWL_SCROLLBAR_TYPE
     29 {
     30 	SBT_HSCROLL,
     31 	SBT_VSCROLL
     32 };
     33 
     34 enum PWL_SBBUTTON_TYPE
     35 {
     36 	PSBT_MIN,
     37 	PSBT_MAX,
     38 	PSBT_POS
     39 };
     40 
     41 class CPWL_SBButton : public CPWL_Wnd
     42 {
     43 public:
     44 	CPWL_SBButton(PWL_SCROLLBAR_TYPE eScrollBarType,PWL_SBBUTTON_TYPE eButtonType);
     45 	virtual ~CPWL_SBButton();
     46 
     47 public:
     48 	virtual CFX_ByteString		GetClassName() const;
     49 	virtual void				OnCreate(PWL_CREATEPARAM & cp);
     50 	virtual void				GetThisAppearanceStream(CFX_ByteTextBuf & sAppStream);
     51 	virtual void				DrawThisAppearance(CFX_RenderDevice* pDevice, CPDF_Matrix* pUser2Device);
     52 	virtual FX_BOOL				OnLButtonDown(const CPDF_Point & point, FX_DWORD nFlag);
     53 	virtual FX_BOOL				OnLButtonUp(const CPDF_Point & point, FX_DWORD nFlag);
     54 	virtual FX_BOOL				OnMouseMove(const CPDF_Point & point, FX_DWORD nFlag);
     55 
     56 protected:
     57 	PWL_SCROLLBAR_TYPE			m_eScrollBarType;
     58 	PWL_SBBUTTON_TYPE			m_eSBButtonType;
     59 
     60 	FX_BOOL						m_bMouseDown;
     61 };
     62 
     63 struct PWL_FLOATRANGE
     64 {
     65 public:
     66 	PWL_FLOATRANGE();
     67 	PWL_FLOATRANGE(FX_FLOAT min,FX_FLOAT max);
     68 	void Default();
     69 	void Set(FX_FLOAT min,FX_FLOAT max);
     70 	FX_BOOL	In(FX_FLOAT x) const;
     71 	FX_FLOAT GetWidth() const;
     72 
     73 	FX_FLOAT fMin,fMax;
     74 };
     75 
     76 struct PWL_SCROLL_PRIVATEDATA
     77 {
     78 public:
     79 	PWL_SCROLL_PRIVATEDATA();
     80 
     81 	void Default();
     82 	void SetScrollRange(FX_FLOAT min,FX_FLOAT max);
     83 	void SetClientWidth(FX_FLOAT width);
     84 	void SetSmallStep(FX_FLOAT step);
     85 	void SetBigStep(FX_FLOAT step);
     86 	FX_BOOL SetPos(FX_FLOAT pos);
     87 
     88 	void AddSmall();
     89 	void SubSmall();
     90 	void AddBig();
     91 	void SubBig();
     92 
     93 	PWL_FLOATRANGE				ScrollRange;
     94 	FX_FLOAT					fClientWidth;
     95 	FX_FLOAT					fScrollPos;
     96 	FX_FLOAT					fBigStep;
     97 	FX_FLOAT					fSmallStep;
     98 };
     99 
    100 class CPWL_ScrollBar : public CPWL_Wnd
    101 {
    102 public:
    103 	CPWL_ScrollBar(PWL_SCROLLBAR_TYPE sbType = SBT_HSCROLL);
    104 	virtual ~CPWL_ScrollBar();
    105 
    106 public:
    107 	virtual CFX_ByteString		GetClassName() const;
    108 	virtual void				OnCreate(PWL_CREATEPARAM & cp);
    109 	virtual void				RePosChildWnd();
    110 	virtual void				GetThisAppearanceStream(CFX_ByteTextBuf & sAppStream);
    111 	virtual void				DrawThisAppearance(CFX_RenderDevice* pDevice, CPDF_Matrix* pUser2Device);
    112 
    113 	virtual FX_BOOL				OnLButtonDown(const CPDF_Point & point, FX_DWORD nFlag);
    114 	virtual FX_BOOL				OnLButtonUp(const CPDF_Point & point, FX_DWORD nFlag);
    115 	virtual void				OnNotify(CPWL_Wnd* pWnd, FX_DWORD msg, FX_INTPTR wParam = 0, FX_INTPTR lParam = 0);
    116 
    117 	virtual void				CreateChildWnd(const PWL_CREATEPARAM & cp);
    118 
    119 	FX_FLOAT					GetScrollBarWidth() const;
    120 	PWL_SCROLLBAR_TYPE			GetScrollBarType() const {return m_sbType;};
    121 
    122 	void						SetNotifyForever(FX_BOOL bForever) {m_bNotifyForever = bForever;}
    123 
    124 protected:
    125 	void						SetScrollRange(FX_FLOAT fMin,FX_FLOAT fMax,FX_FLOAT fClientWidth);
    126 	void						SetScrollPos(FX_FLOAT fPos);
    127 	void						MovePosButton(FX_BOOL bRefresh);
    128 	void						SetScrollStep(FX_FLOAT fBigStep,FX_FLOAT fSmallStep);
    129 	void						NotifyScrollWindow();
    130 	CPDF_Rect					GetScrollArea() const;
    131 
    132 private:
    133 	void						CreateButtons(const PWL_CREATEPARAM & cp);
    134 
    135 	void						OnMinButtonLBDown(const CPDF_Point & point);
    136 	void						OnMinButtonLBUp(const CPDF_Point & point);
    137 	void						OnMinButtonMouseMove(const CPDF_Point & point);
    138 
    139 	void						OnMaxButtonLBDown(const CPDF_Point & point);
    140 	void						OnMaxButtonLBUp(const CPDF_Point & point);
    141 	void						OnMaxButtonMouseMove(const CPDF_Point & point);
    142 
    143 	void						OnPosButtonLBDown(const CPDF_Point & point);
    144 	void						OnPosButtonLBUp(const CPDF_Point & point);
    145 	void						OnPosButtonMouseMove(const CPDF_Point & point);
    146 
    147 	FX_FLOAT					TrueToFace(FX_FLOAT);
    148 	FX_FLOAT					FaceToTrue(FX_FLOAT);
    149 
    150 	virtual	void				TimerProc();
    151 
    152 private:
    153 	PWL_SCROLLBAR_TYPE			m_sbType;
    154 	PWL_SCROLL_INFO				m_OriginInfo;
    155 	CPWL_SBButton*				m_pMinButton;
    156 	CPWL_SBButton*				m_pMaxButton;
    157 	CPWL_SBButton*				m_pPosButton;
    158 	PWL_SCROLL_PRIVATEDATA		m_sData;
    159 	FX_BOOL						m_bMouseDown;
    160 	FX_BOOL						m_bMinOrMax;
    161 	FX_BOOL						m_bNotifyForever;
    162 	FX_FLOAT					m_nOldPos;
    163 	FX_FLOAT					m_fOldPosButton;
    164 };
    165 
    166 #endif  // FPDFSDK_INCLUDE_PDFWINDOW_PWL_SCROLLBAR_H_
    167