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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.
#include <memory>
#include "core/fxcrt/cfx_timer.h"
#include "core/fxcrt/fx_system.h"
#include "third_party/base/check.h"
#include "xfa/fwl/cfwl_eventscroll.h"
#include "xfa/fwl/cfwl_widget.h"
#define FWL_STYLEEXT_SCB_Horz (0L << 0)
#define FWL_STYLEEXT_SCB_Vert (1L << 0)
class CFWL_ScrollBar final : public CFWL_Widget,
public CFX_Timer::CallbackIface {
~CFWL_ScrollBar() override;
// CFWL_Widget:
FWL_Type GetClassID() const override;
void Update() override;
void DrawWidget(CFGAS_GEGraphics* pGraphics,
const CFX_Matrix& matrix) override;
void OnProcessMessage(CFWL_Message* pMessage) override;
void OnDrawWidget(CFGAS_GEGraphics* pGraphics,
const CFX_Matrix& matrix) override;
// CFX_Timer::CallbackIface:
void OnTimerFired() override;
void GetRange(float* fMin, float* fMax) const {
*fMin = m_fRangeMin;
*fMax = m_fRangeMax;
void SetRange(float fMin, float fMax) {
m_fRangeMin = fMin;
m_fRangeMax = fMax;
float GetPageSize() const { return m_fPageSize; }
void SetPageSize(float fPageSize) { m_fPageSize = fPageSize; }
float GetStepSize() const { return m_fStepSize; }
void SetStepSize(float fStepSize) { m_fStepSize = fStepSize; }
float GetPos() const { return m_fPos; }
void SetPos(float fPos) { m_fPos = fPos; }
void SetTrackPos(float fTrackPos);
CFWL_ScrollBar(CFWL_App* app,
const Properties& properties,
CFWL_Widget* pOuter);
bool IsVertical() const {
return !!(m_Properties.m_dwStyleExes & FWL_STYLEEXT_SCB_Vert);
void DrawTrack(CFGAS_GEGraphics* pGraphics,
bool bLower,
const CFX_Matrix& mtMatrix);
void DrawArrowBtn(CFGAS_GEGraphics* pGraphics,
bool bMinBtn,
const CFX_Matrix& mtMatrix);
void DrawThumb(CFGAS_GEGraphics* pGraphics, const CFX_Matrix& mtMatrix);
void Layout();
void CalcButtonLen();
CFX_RectF CalcMinButtonRect();
CFX_RectF CalcMaxButtonRect();
CFX_RectF CalcThumbButtonRect(const CFX_RectF& rtThumbRect);
CFX_RectF CalcMinTrackRect(const CFX_RectF& rtMinRect);
CFX_RectF CalcMaxTrackRect(const CFX_RectF& rtMaxRect);
float GetTrackPointPos(const CFX_PointF& point);
bool SendEvent();
bool OnScroll(CFWL_EventScroll::Code dwCode, float fPos);
void OnLButtonDown(const CFX_PointF& point);
void OnLButtonUp(const CFX_PointF& point);
void OnMouseMove(const CFX_PointF& point);
void OnMouseLeave();
void OnMouseWheel(const CFX_Vector& delta);
bool DoScroll(CFWL_EventScroll::Code dwCode, float fPos);
void DoMouseDown(int32_t iItem,
const CFX_RectF& rtItem,
int32_t& iState,
const CFX_PointF& point);
void DoMouseUp(int32_t iItem,
const CFX_RectF& rtItem,
int32_t& iState,
const CFX_PointF& point);
void DoMouseMove(int32_t iItem,
const CFX_RectF& rtItem,
int32_t& iState,
const CFX_PointF& point);
void DoMouseLeave(int32_t iItem, const CFX_RectF& rtItem, int32_t& iState);
void DoMouseHover(int32_t iItem, const CFX_RectF& rtItem, int32_t& iState);
float m_fRangeMin = 0.0f;
float m_fRangeMax = -1.0f;
float m_fPageSize = 0.0f;
float m_fStepSize = 0.0f;
float m_fPos = 0.0f;
float m_fTrackPos = 0.0f;
int32_t m_iMinButtonState = CFWL_PartState_Normal;
int32_t m_iMaxButtonState = CFWL_PartState_Normal;
int32_t m_iThumbButtonState = CFWL_PartState_Normal;
int32_t m_iMinTrackState = CFWL_PartState_Normal;
int32_t m_iMaxTrackState = CFWL_PartState_Normal;
float m_fLastTrackPos = 0.0f;
CFX_PointF m_cpTrackPoint;
int32_t m_iMouseWheel = 0;
float m_fButtonLen = 0.0f;
bool m_bMouseDown = false;
bool m_bMinSize = false;
CFX_RectF m_ClientRect;
CFX_RectF m_ThumbRect;
CFX_RectF m_MinBtnRect;
CFX_RectF m_MaxBtnRect;
CFX_RectF m_MinTrackRect;
CFX_RectF m_MaxTrackRect;
std::unique_ptr<CFX_Timer> m_pTimer;