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_PDFWINDOW_PWL_SCROLLBAR_H_ 8 #define FPDFSDK_PDFWINDOW_PWL_SCROLLBAR_H_ 9 10 #include "fpdfsdk/pdfwindow/PWL_Wnd.h" 11 12 class CPWL_SBButton; 13 class CPWL_ScrollBar; 14 15 struct PWL_SCROLL_INFO { 16 public: 17 PWL_SCROLL_INFO() 18 : fContentMin(0.0f), 19 fContentMax(0.0f), 20 fPlateWidth(0.0f), 21 fBigStep(0.0f), 22 fSmallStep(0.0f) {} 23 24 bool operator==(const PWL_SCROLL_INFO& that) const { 25 return fContentMin == that.fContentMin && fContentMax == that.fContentMax && 26 fPlateWidth == that.fPlateWidth && fBigStep == that.fBigStep && 27 fSmallStep == that.fSmallStep; 28 } 29 bool operator!=(const PWL_SCROLL_INFO& that) const { 30 return !(*this == that); 31 } 32 33 FX_FLOAT fContentMin; 34 FX_FLOAT fContentMax; 35 FX_FLOAT fPlateWidth; 36 FX_FLOAT fBigStep; 37 FX_FLOAT fSmallStep; 38 }; 39 40 enum PWL_SCROLLBAR_TYPE { SBT_HSCROLL, SBT_VSCROLL }; 41 42 enum PWL_SBBUTTON_TYPE { PSBT_MIN, PSBT_MAX, PSBT_POS }; 43 44 class CPWL_SBButton : public CPWL_Wnd { 45 public: 46 CPWL_SBButton(PWL_SCROLLBAR_TYPE eScrollBarType, 47 PWL_SBBUTTON_TYPE eButtonType); 48 ~CPWL_SBButton() override; 49 50 // CPWL_Wnd 51 CFX_ByteString GetClassName() const override; 52 void OnCreate(PWL_CREATEPARAM& cp) override; 53 void GetThisAppearanceStream(CFX_ByteTextBuf& sAppStream) override; 54 void DrawThisAppearance(CFX_RenderDevice* pDevice, 55 CFX_Matrix* pUser2Device) override; 56 bool OnLButtonDown(const CFX_PointF& point, uint32_t nFlag) override; 57 bool OnLButtonUp(const CFX_PointF& point, uint32_t nFlag) override; 58 bool OnMouseMove(const CFX_PointF& point, uint32_t nFlag) override; 59 60 protected: 61 PWL_SCROLLBAR_TYPE m_eScrollBarType; 62 PWL_SBBUTTON_TYPE m_eSBButtonType; 63 64 bool m_bMouseDown; 65 }; 66 67 struct PWL_FLOATRANGE { 68 public: 69 PWL_FLOATRANGE(); 70 PWL_FLOATRANGE(FX_FLOAT min, FX_FLOAT max); 71 72 bool operator==(const PWL_FLOATRANGE& that) const { 73 return fMin == that.fMin && fMax == that.fMax; 74 } 75 bool operator!=(const PWL_FLOATRANGE& that) const { return !(*this == that); } 76 77 void Default(); 78 void Set(FX_FLOAT min, FX_FLOAT max); 79 bool In(FX_FLOAT x) const; 80 FX_FLOAT GetWidth() const; 81 82 FX_FLOAT fMin; 83 FX_FLOAT fMax; 84 }; 85 86 struct PWL_SCROLL_PRIVATEDATA { 87 public: 88 PWL_SCROLL_PRIVATEDATA(); 89 90 bool operator==(const PWL_SCROLL_PRIVATEDATA& that) const { 91 return ScrollRange == that.ScrollRange && 92 fClientWidth == that.fClientWidth && fScrollPos == that.fScrollPos && 93 fBigStep == that.fBigStep && fSmallStep == that.fSmallStep; 94 } 95 bool operator!=(const PWL_SCROLL_PRIVATEDATA& that) const { 96 return !(*this == that); 97 } 98 99 void Default(); 100 void SetScrollRange(FX_FLOAT min, FX_FLOAT max); 101 void SetClientWidth(FX_FLOAT width); 102 void SetSmallStep(FX_FLOAT step); 103 void SetBigStep(FX_FLOAT step); 104 bool SetPos(FX_FLOAT pos); 105 106 void AddSmall(); 107 void SubSmall(); 108 void AddBig(); 109 void SubBig(); 110 111 PWL_FLOATRANGE ScrollRange; 112 FX_FLOAT fClientWidth; 113 FX_FLOAT fScrollPos; 114 FX_FLOAT fBigStep; 115 FX_FLOAT fSmallStep; 116 }; 117 118 class CPWL_ScrollBar : public CPWL_Wnd { 119 public: 120 explicit CPWL_ScrollBar(PWL_SCROLLBAR_TYPE sbType = SBT_HSCROLL); 121 ~CPWL_ScrollBar() override; 122 123 // CPWL_Wnd 124 CFX_ByteString GetClassName() const override; 125 void OnCreate(PWL_CREATEPARAM& cp) override; 126 void RePosChildWnd() override; 127 void GetThisAppearanceStream(CFX_ByteTextBuf& sAppStream) override; 128 void DrawThisAppearance(CFX_RenderDevice* pDevice, 129 CFX_Matrix* pUser2Device) override; 130 bool OnLButtonDown(const CFX_PointF& point, uint32_t nFlag) override; 131 bool OnLButtonUp(const CFX_PointF& point, uint32_t nFlag) override; 132 void OnNotify(CPWL_Wnd* pWnd, 133 uint32_t msg, 134 intptr_t wParam = 0, 135 intptr_t lParam = 0) override; 136 void CreateChildWnd(const PWL_CREATEPARAM& cp) override; 137 void TimerProc() override; 138 139 FX_FLOAT GetScrollBarWidth() const; 140 PWL_SCROLLBAR_TYPE GetScrollBarType() const { return m_sbType; } 141 142 void SetNotifyForever(bool bForever) { m_bNotifyForever = bForever; } 143 144 protected: 145 void SetScrollRange(FX_FLOAT fMin, FX_FLOAT fMax, FX_FLOAT fClientWidth); 146 void SetScrollPos(FX_FLOAT fPos); 147 void MovePosButton(bool bRefresh); 148 void SetScrollStep(FX_FLOAT fBigStep, FX_FLOAT fSmallStep); 149 void NotifyScrollWindow(); 150 CFX_FloatRect GetScrollArea() const; 151 152 private: 153 void CreateButtons(const PWL_CREATEPARAM& cp); 154 155 void OnMinButtonLBDown(const CFX_PointF& point); 156 void OnMinButtonLBUp(const CFX_PointF& point); 157 void OnMinButtonMouseMove(const CFX_PointF& point); 158 159 void OnMaxButtonLBDown(const CFX_PointF& point); 160 void OnMaxButtonLBUp(const CFX_PointF& point); 161 void OnMaxButtonMouseMove(const CFX_PointF& point); 162 163 void OnPosButtonLBDown(const CFX_PointF& point); 164 void OnPosButtonLBUp(const CFX_PointF& point); 165 void OnPosButtonMouseMove(const CFX_PointF& point); 166 167 FX_FLOAT TrueToFace(FX_FLOAT); 168 FX_FLOAT FaceToTrue(FX_FLOAT); 169 170 PWL_SCROLLBAR_TYPE m_sbType; 171 PWL_SCROLL_INFO m_OriginInfo; 172 CPWL_SBButton* m_pMinButton; 173 CPWL_SBButton* m_pMaxButton; 174 CPWL_SBButton* m_pPosButton; 175 PWL_SCROLL_PRIVATEDATA m_sData; 176 bool m_bMouseDown; 177 bool m_bMinOrMax; 178 bool m_bNotifyForever; 179 FX_FLOAT m_nOldPos; 180 FX_FLOAT m_fOldPosButton; 181 }; 182 183 #endif // FPDFSDK_PDFWINDOW_PWL_SCROLLBAR_H_ 184
