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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 XFA_FWL_CFWL_SCROLLBAR_H_
      8 #define XFA_FWL_CFWL_SCROLLBAR_H_
      9 
     10 #include <memory>
     11 
     12 #include "core/fxcrt/fx_system.h"
     13 #include "xfa/fwl/cfwl_eventscroll.h"
     14 #include "xfa/fwl/cfwl_timer.h"
     15 #include "xfa/fwl/cfwl_widget.h"
     16 #include "xfa/fwl/cfwl_widgetproperties.h"
     17 
     18 class CFWL_Widget;
     19 
     20 #define FWL_STYLEEXT_SCB_Horz (0L << 0)
     21 #define FWL_STYLEEXT_SCB_Vert (1L << 0)
     22 
     23 class CFWL_ScrollBar : public CFWL_Widget {
     24  public:
     25   CFWL_ScrollBar(const CFWL_App* app,
     26                  std::unique_ptr<CFWL_WidgetProperties> properties,
     27                  CFWL_Widget* pOuter);
     28   ~CFWL_ScrollBar() override;
     29 
     30   // CFWL_Widget
     31   FWL_Type GetClassID() const override;
     32   void Update() override;
     33   void DrawWidget(CFX_Graphics* pGraphics, const CFX_Matrix* pMatrix) override;
     34   void OnProcessMessage(CFWL_Message* pMessage) override;
     35   void OnDrawWidget(CFX_Graphics* pGraphics,
     36                     const CFX_Matrix* pMatrix) override;
     37 
     38   void GetRange(FX_FLOAT* fMin, FX_FLOAT* fMax) const {
     39     ASSERT(fMin);
     40     ASSERT(fMax);
     41     *fMin = m_fRangeMin;
     42     *fMax = m_fRangeMax;
     43   }
     44   void SetRange(FX_FLOAT fMin, FX_FLOAT fMax) {
     45     m_fRangeMin = fMin;
     46     m_fRangeMax = fMax;
     47   }
     48   FX_FLOAT GetPageSize() const { return m_fPageSize; }
     49   void SetPageSize(FX_FLOAT fPageSize) { m_fPageSize = fPageSize; }
     50   FX_FLOAT GetStepSize() const { return m_fStepSize; }
     51   void SetStepSize(FX_FLOAT fStepSize) { m_fStepSize = fStepSize; }
     52   FX_FLOAT GetPos() const { return m_fPos; }
     53   void SetPos(FX_FLOAT fPos) { m_fPos = fPos; }
     54   void SetTrackPos(FX_FLOAT fTrackPos);
     55 
     56  private:
     57   class Timer : public CFWL_Timer {
     58    public:
     59     explicit Timer(CFWL_ScrollBar* pToolTip);
     60     ~Timer() override {}
     61 
     62     void Run(CFWL_TimerInfo* pTimerInfo) override;
     63   };
     64   friend class CFWL_ScrollBar::Timer;
     65 
     66   bool IsVertical() const {
     67     return !!(m_pProperties->m_dwStyleExes & FWL_STYLEEXT_SCB_Vert);
     68   }
     69   void DrawTrack(CFX_Graphics* pGraphics,
     70                  IFWL_ThemeProvider* pTheme,
     71                  bool bLower,
     72                  const CFX_Matrix* pMatrix);
     73   void DrawArrowBtn(CFX_Graphics* pGraphics,
     74                     IFWL_ThemeProvider* pTheme,
     75                     bool bMinBtn,
     76                     const CFX_Matrix* pMatrix);
     77   void DrawThumb(CFX_Graphics* pGraphics,
     78                  IFWL_ThemeProvider* pTheme,
     79                  const CFX_Matrix* pMatrix);
     80   void Layout();
     81   void CalcButtonLen();
     82   CFX_RectF CalcMinButtonRect();
     83   CFX_RectF CalcMaxButtonRect();
     84   CFX_RectF CalcThumbButtonRect(const CFX_RectF& rtThumbRect);
     85   CFX_RectF CalcMinTrackRect(const CFX_RectF& rtMinRect);
     86   CFX_RectF CalcMaxTrackRect(const CFX_RectF& rtMaxRect);
     87   FX_FLOAT GetTrackPointPos(const CFX_PointF& point);
     88 
     89   bool SendEvent();
     90   bool OnScroll(CFWL_EventScroll::Code dwCode, FX_FLOAT fPos);
     91   void OnLButtonDown(const CFX_PointF& point);
     92   void OnLButtonUp(const CFX_PointF& point);
     93   void OnMouseMove(const CFX_PointF& point);
     94   void OnMouseLeave();
     95   void OnMouseWheel(const CFX_PointF& delta);
     96   bool DoScroll(CFWL_EventScroll::Code dwCode, FX_FLOAT fPos);
     97   void DoMouseDown(int32_t iItem,
     98                    const CFX_RectF& rtItem,
     99                    int32_t& iState,
    100                    const CFX_PointF& point);
    101   void DoMouseUp(int32_t iItem,
    102                  const CFX_RectF& rtItem,
    103                  int32_t& iState,
    104                  const CFX_PointF& point);
    105   void DoMouseMove(int32_t iItem,
    106                    const CFX_RectF& rtItem,
    107                    int32_t& iState,
    108                    const CFX_PointF& point);
    109   void DoMouseLeave(int32_t iItem, const CFX_RectF& rtItem, int32_t& iState);
    110   void DoMouseHover(int32_t iItem, const CFX_RectF& rtItem, int32_t& iState);
    111 
    112   CFWL_TimerInfo* m_pTimerInfo;
    113   FX_FLOAT m_fRangeMin;
    114   FX_FLOAT m_fRangeMax;
    115   FX_FLOAT m_fPageSize;
    116   FX_FLOAT m_fStepSize;
    117   FX_FLOAT m_fPos;
    118   FX_FLOAT m_fTrackPos;
    119   int32_t m_iMinButtonState;
    120   int32_t m_iMaxButtonState;
    121   int32_t m_iThumbButtonState;
    122   int32_t m_iMinTrackState;
    123   int32_t m_iMaxTrackState;
    124   FX_FLOAT m_fLastTrackPos;
    125   CFX_PointF m_cpTrackPoint;
    126   int32_t m_iMouseWheel;
    127   bool m_bMouseDown;
    128   FX_FLOAT m_fButtonLen;
    129   bool m_bMinSize;
    130   CFX_RectF m_rtClient;
    131   CFX_RectF m_rtThumb;
    132   CFX_RectF m_rtMinBtn;
    133   CFX_RectF m_rtMaxBtn;
    134   CFX_RectF m_rtMinTrack;
    135   CFX_RectF m_rtMaxTrack;
    136   CFWL_ScrollBar::Timer m_Timer;
    137 };
    138 
    139 #endif  // XFA_FWL_CFWL_SCROLLBAR_H_
    140