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// 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/unowned_ptr.h"
#include "fpdfsdk/pwl/cpwl_wnd.h"
class CPWL_SBButton;
class CPWL_ScrollBar;
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;
};
enum PWL_SCROLLBAR_TYPE { SBT_HSCROLL, SBT_VSCROLL };
enum PWL_SBBUTTON_TYPE { PSBT_MIN, PSBT_MAX, PSBT_POS };
class CPWL_SBButton final : public CPWL_Wnd {
public:
CPWL_SBButton(std::unique_ptr<PrivateData> pAttachedData,
PWL_SCROLLBAR_TYPE eScrollBarType,
PWL_SBBUTTON_TYPE eButtonType);
~CPWL_SBButton() override;
// CPWL_Wnd
void OnCreate(CreateParams* pParamsToAdjust) override;
void DrawThisAppearance(CFX_RenderDevice* pDevice,
const CFX_Matrix& mtUser2Device) override;
bool OnLButtonDown(const CFX_PointF& point, uint32_t nFlag) override;
bool OnLButtonUp(const CFX_PointF& point, uint32_t nFlag) override;
bool OnMouseMove(const CFX_PointF& point, uint32_t nFlag) override;
private:
PWL_SCROLLBAR_TYPE m_eScrollBarType;
PWL_SBBUTTON_TYPE m_eSBButtonType;
bool m_bMouseDown = false;
};
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:
CPWL_ScrollBar(std::unique_ptr<PrivateData> pAttachedData,
PWL_SCROLLBAR_TYPE sbType);
~CPWL_ScrollBar() override;
// CPWL_Wnd:
void OnCreate(CreateParams* pParamsToAdjust) override;
void OnDestroy() override;
bool RePosChildWnd() override;
void DrawThisAppearance(CFX_RenderDevice* pDevice,
const CFX_Matrix& mtUser2Device) override;
bool OnLButtonDown(const CFX_PointF& point, uint32_t nFlag) override;
bool OnLButtonUp(const CFX_PointF& point, uint32_t nFlag) 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;
void TimerProc() override;
float GetScrollBarWidth() const;
PWL_SCROLLBAR_TYPE GetScrollBarType() const { return m_sbType; }
void SetNotifyForever(bool bForever) { m_bNotifyForever = bForever; }
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_SCROLLBAR_TYPE m_sbType;
PWL_SCROLL_INFO m_OriginInfo;
UnownedPtr<CPWL_SBButton> m_pMinButton;
UnownedPtr<CPWL_SBButton> m_pMaxButton;
UnownedPtr<CPWL_SBButton> m_pPosButton;
PWL_SCROLL_PRIVATEDATA m_sData;
bool m_bMouseDown = false;
bool m_bMinOrMax = false;
bool m_bNotifyForever = true;
float m_nOldPos = 0.0f;
float m_fOldPosButton = 0.0f;
};
#endif // FPDFSDK_PWL_CPWL_SCROLL_BAR_H_
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