469 lines
15 KiB
C++
469 lines
15 KiB
C++
// Copyright 2014 The PDFium Authors
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
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#include "xfa/fwl/cfwl_scrollbar.h"
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#include <algorithm>
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#include <memory>
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#include <utility>
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#include "third_party/base/cxx17_backports.h"
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#include "xfa/fwl/cfwl_app.h"
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#include "xfa/fwl/cfwl_messagemouse.h"
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#include "xfa/fwl/cfwl_messagemousewheel.h"
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#include "xfa/fwl/cfwl_notedriver.h"
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#include "xfa/fwl/cfwl_themebackground.h"
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#include "xfa/fwl/cfwl_themepart.h"
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#include "xfa/fwl/ifwl_themeprovider.h"
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namespace {
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constexpr int kScrollbarElapsedMsecs = 500;
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constexpr float kMinThumbSize = 5.0f;
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} // namespace
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CFWL_ScrollBar::CFWL_ScrollBar(CFWL_App* app,
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const Properties& properties,
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CFWL_Widget* pOuter)
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: CFWL_Widget(app, properties, pOuter) {}
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CFWL_ScrollBar::~CFWL_ScrollBar() = default;
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FWL_Type CFWL_ScrollBar::GetClassID() const {
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return FWL_Type::ScrollBar;
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}
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void CFWL_ScrollBar::Update() {
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if (IsLocked())
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return;
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Layout();
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}
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void CFWL_ScrollBar::DrawWidget(CFGAS_GEGraphics* pGraphics,
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const CFX_Matrix& matrix) {
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if (!pGraphics)
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return;
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if (HasBorder())
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DrawBorder(pGraphics, CFWL_ThemePart::Part::kBorder, matrix);
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DrawLowerTrack(pGraphics, matrix);
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DrawUpperTrack(pGraphics, matrix);
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DrawMinArrowBtn(pGraphics, matrix);
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DrawMaxArrowBtn(pGraphics, matrix);
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DrawThumb(pGraphics, matrix);
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}
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void CFWL_ScrollBar::SetTrackPos(float fTrackPos) {
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m_fTrackPos = fTrackPos;
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m_ThumbRect = CalcThumbButtonRect(m_ThumbRect);
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m_MinTrackRect = CalcMinTrackRect(m_MinTrackRect);
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m_MaxTrackRect = CalcMaxTrackRect(m_MaxTrackRect);
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}
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bool CFWL_ScrollBar::DoScroll(CFWL_EventScroll::Code dwCode, float fPos) {
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if (dwCode == CFWL_EventScroll::Code::None)
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return false;
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return OnScroll(dwCode, fPos);
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}
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void CFWL_ScrollBar::DrawUpperTrack(CFGAS_GEGraphics* pGraphics,
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const CFX_Matrix& mtMatrix) {
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CFWL_ThemeBackground param(CFWL_ThemePart::Part::kUpperTrack, this,
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pGraphics);
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param.m_dwStates = (m_Properties.m_dwStates & FWL_STATE_WGT_Disabled)
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? CFWL_PartState::kDisabled
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: m_iMaxTrackState;
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param.m_matrix = mtMatrix;
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param.m_PartRect = m_MaxTrackRect;
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GetThemeProvider()->DrawBackground(param);
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}
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void CFWL_ScrollBar::DrawLowerTrack(CFGAS_GEGraphics* pGraphics,
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const CFX_Matrix& mtMatrix) {
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CFWL_ThemeBackground param(CFWL_ThemePart::Part::kLowerTrack, this,
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pGraphics);
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param.m_dwStates = (m_Properties.m_dwStates & FWL_STATE_WGT_Disabled)
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? CFWL_PartState::kDisabled
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: m_iMinTrackState;
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param.m_matrix = mtMatrix;
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param.m_PartRect = m_MinTrackRect;
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GetThemeProvider()->DrawBackground(param);
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}
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void CFWL_ScrollBar::DrawMaxArrowBtn(CFGAS_GEGraphics* pGraphics,
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const CFX_Matrix& mtMatrix) {
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CFWL_ThemeBackground param(CFWL_ThemePart::Part::kBackArrow, this, pGraphics);
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param.m_dwStates = (m_Properties.m_dwStates & FWL_STATE_WGT_Disabled)
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? CFWL_PartState::kDisabled
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: m_iMaxButtonState;
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param.m_matrix = mtMatrix;
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param.m_PartRect = m_MaxBtnRect;
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if (param.m_PartRect.height > 0 && param.m_PartRect.width > 0)
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GetThemeProvider()->DrawBackground(param);
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}
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void CFWL_ScrollBar::DrawMinArrowBtn(CFGAS_GEGraphics* pGraphics,
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const CFX_Matrix& mtMatrix) {
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CFWL_ThemeBackground param(CFWL_ThemePart::Part::kForeArrow, this, pGraphics);
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param.m_dwStates = (m_Properties.m_dwStates & FWL_STATE_WGT_Disabled)
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? CFWL_PartState::kDisabled
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: m_iMinButtonState;
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param.m_matrix = mtMatrix;
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param.m_PartRect = m_MinBtnRect;
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if (param.m_PartRect.height > 0 && param.m_PartRect.width > 0)
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GetThemeProvider()->DrawBackground(param);
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}
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void CFWL_ScrollBar::DrawThumb(CFGAS_GEGraphics* pGraphics,
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const CFX_Matrix& mtMatrix) {
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CFWL_ThemeBackground param(CFWL_ThemePart::Part::kThumb, this, pGraphics);
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param.m_dwStates = (m_Properties.m_dwStates & FWL_STATE_WGT_Disabled)
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? CFWL_PartState::kDisabled
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: m_iThumbButtonState;
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param.m_matrix = mtMatrix;
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param.m_PartRect = m_ThumbRect;
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GetThemeProvider()->DrawBackground(param);
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}
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void CFWL_ScrollBar::Layout() {
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m_ClientRect = GetClientRect();
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CalcButtonLen();
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m_MinBtnRect = CalcMinButtonRect();
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m_MaxBtnRect = CalcMaxButtonRect();
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m_ThumbRect = CalcThumbButtonRect(m_ThumbRect);
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m_MinTrackRect = CalcMinTrackRect(m_MinTrackRect);
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m_MaxTrackRect = CalcMaxTrackRect(m_MaxTrackRect);
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}
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void CFWL_ScrollBar::CalcButtonLen() {
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m_fButtonLen = IsVertical() ? m_ClientRect.width : m_ClientRect.height;
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float fLength = IsVertical() ? m_ClientRect.height : m_ClientRect.width;
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if (fLength < m_fButtonLen * 2) {
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m_fButtonLen = fLength / 2;
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m_bMinSize = true;
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} else {
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m_bMinSize = false;
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}
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}
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CFX_RectF CFWL_ScrollBar::CalcMinButtonRect() {
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if (IsVertical())
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return CFX_RectF(m_ClientRect.TopLeft(), m_ClientRect.width, m_fButtonLen);
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return CFX_RectF(m_ClientRect.TopLeft(), m_fButtonLen, m_ClientRect.height);
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}
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CFX_RectF CFWL_ScrollBar::CalcMaxButtonRect() {
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if (IsVertical()) {
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return CFX_RectF(m_ClientRect.left, m_ClientRect.bottom() - m_fButtonLen,
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m_ClientRect.width, m_fButtonLen);
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}
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return CFX_RectF(m_ClientRect.right() - m_fButtonLen, m_ClientRect.top,
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m_fButtonLen, m_ClientRect.height);
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}
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CFX_RectF CFWL_ScrollBar::CalcThumbButtonRect(const CFX_RectF& rtThumb) {
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CFX_RectF rect;
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if (!IsEnabled())
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return rect;
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if (m_bMinSize) {
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rect.left = rtThumb.left;
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rect.top = rtThumb.top;
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return rect;
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}
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float fRange = m_fRangeMax - m_fRangeMin;
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if (fRange < 0) {
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if (IsVertical()) {
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return CFX_RectF(m_ClientRect.left, m_MaxBtnRect.bottom(),
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m_ClientRect.width, 0);
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}
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return CFX_RectF(m_MaxBtnRect.right(), m_ClientRect.top, 0,
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m_ClientRect.height);
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}
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CFX_RectF rtClient = m_ClientRect;
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float fLength = IsVertical() ? rtClient.height : rtClient.width;
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float fSize = m_fButtonLen;
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fLength -= fSize * 2.0f;
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if (fLength < fSize)
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fLength = 0.0f;
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float fThumbSize = fLength * fLength / (fRange + fLength);
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fThumbSize = std::max(fThumbSize, kMinThumbSize);
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float fDiff = std::max(fLength - fThumbSize, 0.0f);
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float fTrackPos = pdfium::clamp(m_fTrackPos, m_fRangeMin, m_fRangeMax);
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if (!fRange)
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return rect;
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float iPos = fSize + fDiff * (fTrackPos - m_fRangeMin) / fRange;
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rect.left = rtClient.left;
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rect.top = rtClient.top;
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if (IsVertical()) {
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rect.top += iPos;
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rect.width = rtClient.width;
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rect.height = fThumbSize;
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} else {
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rect.left += iPos;
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rect.width = fThumbSize;
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rect.height = rtClient.height;
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}
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return rect;
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}
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CFX_RectF CFWL_ScrollBar::CalcMinTrackRect(const CFX_RectF& rtMinRect) {
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CFX_RectF rect;
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if (m_bMinSize) {
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rect.left = rtMinRect.left;
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rect.top = rtMinRect.top;
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return rect;
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}
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rect.left = m_ClientRect.left;
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rect.top = m_ClientRect.top;
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if (IsVertical()) {
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rect.width = m_ClientRect.width;
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rect.height = (m_ThumbRect.top + m_ThumbRect.bottom()) / 2;
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} else {
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rect.width = (m_ThumbRect.left + m_ThumbRect.right()) / 2;
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rect.height = m_ClientRect.height;
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}
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return rect;
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}
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CFX_RectF CFWL_ScrollBar::CalcMaxTrackRect(const CFX_RectF& rtMaxRect) {
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if (m_bMinSize)
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return CFX_RectF(rtMaxRect.TopLeft(), 0, 0);
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if (IsVertical()) {
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float iy = (m_ThumbRect.top + m_ThumbRect.bottom()) / 2;
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return CFX_RectF(m_ClientRect.left, iy, m_ClientRect.width,
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m_ClientRect.bottom() - iy);
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}
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float ix = (m_ThumbRect.left + m_ThumbRect.right()) / 2;
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return CFX_RectF(ix, m_ClientRect.top, m_ClientRect.height - ix,
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m_ClientRect.height);
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}
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float CFWL_ScrollBar::GetTrackPointPos(const CFX_PointF& point) {
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CFX_PointF diff = point - m_cpTrackPoint;
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float fRange = m_fRangeMax - m_fRangeMin;
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float fPos;
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if (IsVertical()) {
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fPos = fRange * diff.y /
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(m_MaxBtnRect.top - m_MinBtnRect.bottom() - m_ThumbRect.height);
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} else {
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fPos = fRange * diff.x /
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(m_MaxBtnRect.left - m_MinBtnRect.right() - m_ThumbRect.width);
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}
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fPos += m_fLastTrackPos;
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return pdfium::clamp(fPos, m_fRangeMin, m_fRangeMax);
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}
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bool CFWL_ScrollBar::SendEvent() {
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if (m_iMinButtonState == CFWL_PartState::kPressed) {
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DoScroll(CFWL_EventScroll::Code::StepBackward, m_fTrackPos);
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return false;
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}
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if (m_iMaxButtonState == CFWL_PartState::kPressed) {
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DoScroll(CFWL_EventScroll::Code::StepForward, m_fTrackPos);
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return false;
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}
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if (m_iMinTrackState == CFWL_PartState::kPressed) {
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DoScroll(CFWL_EventScroll::Code::PageBackward, m_fTrackPos);
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return m_ThumbRect.Contains(m_cpTrackPoint);
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}
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if (m_iMaxTrackState == CFWL_PartState::kPressed) {
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DoScroll(CFWL_EventScroll::Code::PageForward, m_fTrackPos);
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return m_ThumbRect.Contains(m_cpTrackPoint);
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}
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if (m_iMouseWheel) {
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CFWL_EventScroll::Code dwCode = m_iMouseWheel < 0
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? CFWL_EventScroll::Code::StepForward
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: CFWL_EventScroll::Code::StepBackward;
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DoScroll(dwCode, m_fTrackPos);
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}
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return true;
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}
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bool CFWL_ScrollBar::OnScroll(CFWL_EventScroll::Code dwCode, float fPos) {
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CFWL_EventScroll ev(this, dwCode, fPos);
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DispatchEvent(&ev);
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return true;
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}
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void CFWL_ScrollBar::OnProcessMessage(CFWL_Message* pMessage) {
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CFWL_Message::Type type = pMessage->GetType();
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if (type == CFWL_Message::Type::kMouse) {
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CFWL_MessageMouse* pMsg = static_cast<CFWL_MessageMouse*>(pMessage);
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switch (pMsg->m_dwCmd) {
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case CFWL_MessageMouse::MouseCommand::kLeftButtonDown:
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OnLButtonDown(pMsg->m_pos);
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break;
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case CFWL_MessageMouse::MouseCommand::kLeftButtonUp:
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OnLButtonUp(pMsg->m_pos);
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break;
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case CFWL_MessageMouse::MouseCommand::kMove:
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OnMouseMove(pMsg->m_pos);
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break;
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case CFWL_MessageMouse::MouseCommand::kLeave:
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OnMouseLeave();
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break;
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default:
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break;
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}
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} else if (type == CFWL_Message::Type::kMouseWheel) {
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auto* pMsg = static_cast<CFWL_MessageMouseWheel*>(pMessage);
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OnMouseWheel(pMsg->delta());
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}
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}
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void CFWL_ScrollBar::OnDrawWidget(CFGAS_GEGraphics* pGraphics,
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const CFX_Matrix& matrix) {
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DrawWidget(pGraphics, matrix);
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}
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void CFWL_ScrollBar::OnLButtonDown(const CFX_PointF& point) {
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if (!IsEnabled())
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return;
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m_bMouseDown = true;
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SetGrab(true);
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m_cpTrackPoint = point;
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m_fLastTrackPos = m_fTrackPos;
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if (m_MinBtnRect.Contains(point))
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DoMouseDown(0, m_MinBtnRect, &m_iMinButtonState, point);
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else if (m_ThumbRect.Contains(point))
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DoMouseDown(1, m_ThumbRect, &m_iThumbButtonState, point);
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else if (m_MaxBtnRect.Contains(point))
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DoMouseDown(2, m_MaxBtnRect, &m_iMaxButtonState, point);
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else if (m_MinTrackRect.Contains(point))
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DoMouseDown(3, m_MinTrackRect, &m_iMinTrackState, point);
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else
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DoMouseDown(4, m_MaxTrackRect, &m_iMaxTrackState, point);
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if (!SendEvent()) {
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m_pTimer = std::make_unique<CFX_Timer>(GetFWLApp()->GetTimerHandler(), this,
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kScrollbarElapsedMsecs);
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}
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}
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void CFWL_ScrollBar::OnLButtonUp(const CFX_PointF& point) {
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m_pTimer.reset();
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m_bMouseDown = false;
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DoMouseUp(0, m_MinBtnRect, &m_iMinButtonState, point);
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DoMouseUp(1, m_ThumbRect, &m_iThumbButtonState, point);
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DoMouseUp(2, m_MaxBtnRect, &m_iMaxButtonState, point);
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DoMouseUp(3, m_MinTrackRect, &m_iMinTrackState, point);
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DoMouseUp(4, m_MaxTrackRect, &m_iMaxTrackState, point);
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SetGrab(false);
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}
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void CFWL_ScrollBar::OnMouseMove(const CFX_PointF& point) {
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DoMouseMove(0, m_MinBtnRect, &m_iMinButtonState, point);
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DoMouseMove(1, m_ThumbRect, &m_iThumbButtonState, point);
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DoMouseMove(2, m_MaxBtnRect, &m_iMaxButtonState, point);
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DoMouseMove(3, m_MinTrackRect, &m_iMinTrackState, point);
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DoMouseMove(4, m_MaxTrackRect, &m_iMaxTrackState, point);
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}
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void CFWL_ScrollBar::OnMouseLeave() {
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DoMouseLeave(0, m_MinBtnRect, &m_iMinButtonState);
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DoMouseLeave(1, m_ThumbRect, &m_iThumbButtonState);
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DoMouseLeave(2, m_MaxBtnRect, &m_iMaxButtonState);
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DoMouseLeave(3, m_MinTrackRect, &m_iMinTrackState);
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DoMouseLeave(4, m_MaxTrackRect, &m_iMaxTrackState);
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}
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void CFWL_ScrollBar::OnMouseWheel(const CFX_Vector& delta) {
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m_iMouseWheel = delta.y;
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SendEvent();
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m_iMouseWheel = 0;
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}
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void CFWL_ScrollBar::DoMouseDown(int32_t iItem,
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const CFX_RectF& rtItem,
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CFWL_PartState* pState,
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const CFX_PointF& point) {
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if (!rtItem.Contains(point))
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return;
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if (*pState == CFWL_PartState::kPressed)
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return;
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*pState = CFWL_PartState::kPressed;
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RepaintRect(rtItem);
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}
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void CFWL_ScrollBar::DoMouseUp(int32_t iItem,
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const CFX_RectF& rtItem,
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CFWL_PartState* pState,
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const CFX_PointF& point) {
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CFWL_PartState iNewState = rtItem.Contains(point) ? CFWL_PartState::kHovered
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: CFWL_PartState::kNormal;
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if (*pState == iNewState)
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return;
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*pState = iNewState;
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RepaintRect(rtItem);
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OnScroll(CFWL_EventScroll::Code::EndScroll, m_fTrackPos);
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}
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void CFWL_ScrollBar::DoMouseMove(int32_t iItem,
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const CFX_RectF& rtItem,
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CFWL_PartState* pState,
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const CFX_PointF& point) {
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if (!m_bMouseDown) {
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CFWL_PartState iNewState = rtItem.Contains(point) ? CFWL_PartState::kHovered
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: CFWL_PartState::kNormal;
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if (*pState == iNewState)
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return;
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*pState = iNewState;
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RepaintRect(rtItem);
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} else if ((2 == iItem) &&
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(m_iThumbButtonState == CFWL_PartState::kPressed)) {
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m_fTrackPos = GetTrackPointPos(point);
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OnScroll(CFWL_EventScroll::Code::TrackPos, m_fTrackPos);
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}
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}
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void CFWL_ScrollBar::DoMouseLeave(int32_t iItem,
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const CFX_RectF& rtItem,
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CFWL_PartState* pState) {
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if (*pState == CFWL_PartState::kNormal)
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return;
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*pState = CFWL_PartState::kNormal;
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RepaintRect(rtItem);
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}
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void CFWL_ScrollBar::DoMouseHover(int32_t iItem,
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const CFX_RectF& rtItem,
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CFWL_PartState* pState) {
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if (*pState == CFWL_PartState::kHovered)
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return;
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*pState = CFWL_PartState::kHovered;
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RepaintRect(rtItem);
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}
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void CFWL_ScrollBar::OnTimerFired() {
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m_pTimer.reset();
|
|
if (!SendEvent()) {
|
|
m_pTimer =
|
|
std::make_unique<CFX_Timer>(GetFWLApp()->GetTimerHandler(), this, 0);
|
|
}
|
|
}
|