| // 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 FPDFSDK_PWL_CPWL_SCROLL_BAR_H_ |
| #define FPDFSDK_PWL_CPWL_SCROLL_BAR_H_ |
| |
| #include <memory> |
| |
| #include "core/fxcrt/cfx_timer.h" |
| #include "core/fxcrt/unowned_ptr.h" |
| #include "fpdfsdk/pwl/cpwl_sbbutton.h" |
| #include "fpdfsdk/pwl/cpwl_wnd.h" |
| |
| struct PWL_SCROLL_INFO { |
| public: |
| PWL_SCROLL_INFO() |
| : fContentMin(0.0f), |
| fContentMax(0.0f), |
| fPlateWidth(0.0f), |
| fBigStep(0.0f), |
| fSmallStep(0.0f) {} |
| |
| bool operator==(const PWL_SCROLL_INFO& that) const { |
| return fContentMin == that.fContentMin && fContentMax == that.fContentMax && |
| fPlateWidth == that.fPlateWidth && fBigStep == that.fBigStep && |
| fSmallStep == that.fSmallStep; |
| } |
| bool operator!=(const PWL_SCROLL_INFO& that) const { |
| return !(*this == that); |
| } |
| |
| float fContentMin; |
| float fContentMax; |
| float fPlateWidth; |
| float fBigStep; |
| float fSmallStep; |
| }; |
| |
| struct PWL_FLOATRANGE { |
| public: |
| PWL_FLOATRANGE() = default; |
| |
| bool operator==(const PWL_FLOATRANGE& that) const { |
| return fMin == that.fMin && fMax == that.fMax; |
| } |
| bool operator!=(const PWL_FLOATRANGE& that) const { return !(*this == that); } |
| |
| void Reset(); |
| void Set(float min, float max); |
| bool In(float x) const; |
| float GetWidth() const; |
| |
| float fMin = 0.0f; |
| float fMax = 0.0f; |
| }; |
| |
| struct PWL_SCROLL_PRIVATEDATA { |
| public: |
| PWL_SCROLL_PRIVATEDATA(); |
| |
| bool operator==(const PWL_SCROLL_PRIVATEDATA& that) const { |
| return ScrollRange == that.ScrollRange && |
| fClientWidth == that.fClientWidth && fScrollPos == that.fScrollPos && |
| fBigStep == that.fBigStep && fSmallStep == that.fSmallStep; |
| } |
| bool operator!=(const PWL_SCROLL_PRIVATEDATA& that) const { |
| return !(*this == that); |
| } |
| |
| void Default(); |
| void SetScrollRange(float min, float max); |
| void SetClientWidth(float width); |
| void SetSmallStep(float step); |
| void SetBigStep(float step); |
| bool SetPos(float pos); |
| |
| void AddSmall(); |
| void SubSmall(); |
| void AddBig(); |
| void SubBig(); |
| |
| PWL_FLOATRANGE ScrollRange; |
| float fClientWidth; |
| float fScrollPos; |
| float fBigStep; |
| float fSmallStep; |
| }; |
| |
| class CPWL_ScrollBar final : public CPWL_Wnd, public CFX_Timer::CallbackIface { |
| public: |
| static constexpr float kWidth = 12.0f; |
| static constexpr uint8_t kTransparency = 150; |
| |
| CPWL_ScrollBar( |
| const CreateParams& cp, |
| std::unique_ptr<IPWL_SystemHandler::PerWindowData> pAttachedData); |
| ~CPWL_ScrollBar() override; |
| |
| // CPWL_Wnd: |
| void OnDestroy() override; |
| bool RePosChildWnd() override; |
| void DrawThisAppearance(CFX_RenderDevice* pDevice, |
| const CFX_Matrix& mtUser2Device) override; |
| bool OnLButtonDown(Mask<FWL_EVENTFLAG> nFlag, |
| const CFX_PointF& point) override; |
| bool OnLButtonUp(Mask<FWL_EVENTFLAG> nFlag, const CFX_PointF& point) override; |
| void SetScrollInfo(const PWL_SCROLL_INFO& info) override; |
| void SetScrollPosition(float pos) override; |
| void NotifyLButtonDown(CPWL_Wnd* child, const CFX_PointF& pos) override; |
| void NotifyLButtonUp(CPWL_Wnd* child, const CFX_PointF& pos) override; |
| void NotifyMouseMove(CPWL_Wnd* child, const CFX_PointF& pos) override; |
| void CreateChildWnd(const CreateParams& cp) override; |
| |
| // CFX_Timer::CallbackIface: |
| void OnTimerFired() override; |
| |
| float GetScrollBarWidth() const; |
| |
| private: |
| void SetScrollRange(float fMin, float fMax, float fClientWidth); |
| void SetScrollPos(float fPos); |
| |
| // Returns |true| iff this instance is still allocated. |
| bool MovePosButton(bool bRefresh); |
| void SetScrollStep(float fBigStep, float fSmallStep); |
| void NotifyScrollWindow(); |
| CFX_FloatRect GetScrollArea() const; |
| |
| void CreateButtons(const CreateParams& cp); |
| |
| void OnMinButtonLBDown(const CFX_PointF& point); |
| void OnMinButtonLBUp(const CFX_PointF& point); |
| void OnMinButtonMouseMove(const CFX_PointF& point); |
| |
| void OnMaxButtonLBDown(const CFX_PointF& point); |
| void OnMaxButtonLBUp(const CFX_PointF& point); |
| void OnMaxButtonMouseMove(const CFX_PointF& point); |
| |
| void OnPosButtonLBDown(const CFX_PointF& point); |
| void OnPosButtonLBUp(const CFX_PointF& point); |
| void OnPosButtonMouseMove(const CFX_PointF& point); |
| |
| float TrueToFace(float); |
| float FaceToTrue(float); |
| |
| PWL_SCROLL_INFO m_OriginInfo; |
| UnownedPtr<CPWL_SBButton> m_pMinButton; |
| UnownedPtr<CPWL_SBButton> m_pMaxButton; |
| UnownedPtr<CPWL_SBButton> m_pPosButton; |
| std::unique_ptr<CFX_Timer> m_pTimer; |
| PWL_SCROLL_PRIVATEDATA m_sData; |
| bool m_bMouseDown = false; |
| bool m_bMinOrMax = false; |
| float m_nOldPos = 0.0f; |
| float m_fOldPosButton = 0.0f; |
| }; |
| |
| #endif // FPDFSDK_PWL_CPWL_SCROLL_BAR_H_ |