// 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 #include "fpdfsdk/pwl/cpwl_scroll_bar.h" #include <algorithm> #include <sstream> #include <vector> #include "core/fxge/cfx_pathdata.h" #include "core/fxge/cfx_renderdevice.h" #include "fpdfsdk/pwl/cpwl_wnd.h" namespace { constexpr float kButtonWidth = 9.0f; constexpr float kPosButtonMinWidth = 2.0f; constexpr float kScrollBarTriangleHalfLength = 2.0f; } // namespace #define PWL_DEFAULT_HEAVYGRAYCOLOR CFX_Color(CFX_Color::kGray, 0.50) PWL_FLOATRANGE::PWL_FLOATRANGE() { Default(); } PWL_FLOATRANGE::PWL_FLOATRANGE(float min, float max) { Set(min, max); } void PWL_FLOATRANGE::Default() { fMin = 0; fMax = 0; } void PWL_FLOATRANGE::Set(float min, float max) { if (min > max) { fMin = max; fMax = min; } else { fMin = min; fMax = max; } } bool PWL_FLOATRANGE::In(float x) const { return (IsFloatBigger(x, fMin) || IsFloatEqual(x, fMin)) && (IsFloatSmaller(x, fMax) || IsFloatEqual(x, fMax)); } float PWL_FLOATRANGE::GetWidth() const { return fMax - fMin; } PWL_SCROLL_PRIVATEDATA::PWL_SCROLL_PRIVATEDATA() { Default(); } void PWL_SCROLL_PRIVATEDATA::Default() { ScrollRange.Default(); fScrollPos = ScrollRange.fMin; fClientWidth = 0; fBigStep = 10; fSmallStep = 1; } void PWL_SCROLL_PRIVATEDATA::SetScrollRange(float min, float max) { ScrollRange.Set(min, max); if (IsFloatSmaller(fScrollPos, ScrollRange.fMin)) fScrollPos = ScrollRange.fMin; if (IsFloatBigger(fScrollPos, ScrollRange.fMax)) fScrollPos = ScrollRange.fMax; } void PWL_SCROLL_PRIVATEDATA::SetClientWidth(float width) { fClientWidth = width; } void PWL_SCROLL_PRIVATEDATA::SetSmallStep(float step) { fSmallStep = step; } void PWL_SCROLL_PRIVATEDATA::SetBigStep(float step) { fBigStep = step; } bool PWL_SCROLL_PRIVATEDATA::SetPos(float pos) { if (ScrollRange.In(pos)) { fScrollPos = pos; return true; } return false; } void PWL_SCROLL_PRIVATEDATA::AddSmall() { if (!SetPos(fScrollPos + fSmallStep)) SetPos(ScrollRange.fMax); } void PWL_SCROLL_PRIVATEDATA::SubSmall() { if (!SetPos(fScrollPos - fSmallStep)) SetPos(ScrollRange.fMin); } void PWL_SCROLL_PRIVATEDATA::AddBig() { if (!SetPos(fScrollPos + fBigStep)) SetPos(ScrollRange.fMax); } void PWL_SCROLL_PRIVATEDATA::SubBig() { if (!SetPos(fScrollPos - fBigStep)) SetPos(ScrollRange.fMin); } CPWL_SBButton::CPWL_SBButton(PWL_SCROLLBAR_TYPE eScrollBarType, PWL_SBBUTTON_TYPE eButtonType) { m_eScrollBarType = eScrollBarType; m_eSBButtonType = eButtonType; m_bMouseDown = false; } CPWL_SBButton::~CPWL_SBButton() {} ByteString CPWL_SBButton::GetClassName() const { return "CPWL_SBButton"; } void CPWL_SBButton::OnCreate(CreateParams* pParamsToAdjust) { pParamsToAdjust->eCursorType = FXCT_ARROW; } void CPWL_SBButton::DrawThisAppearance(CFX_RenderDevice* pDevice, const CFX_Matrix& mtUser2Device) { if (!IsVisible()) return; CFX_FloatRect rectWnd = GetWindowRect(); if (rectWnd.IsEmpty()) return; CFX_PointF ptCenter = GetCenterPoint(); int32_t nTransparency = GetTransparency(); if (m_eScrollBarType == SBT_HSCROLL) { CPWL_Wnd::DrawThisAppearance(pDevice, mtUser2Device); CFX_PointF pt1; CFX_PointF pt2; CFX_PointF pt3; static constexpr float kScrollBarTriangleQuarterLength = kScrollBarTriangleHalfLength * 0.5; if (m_eSBButtonType == PSBT_MIN) { pt1 = CFX_PointF(ptCenter.x - kScrollBarTriangleQuarterLength, ptCenter.y); pt2 = CFX_PointF(ptCenter.x + kScrollBarTriangleQuarterLength, ptCenter.y + kScrollBarTriangleHalfLength); pt3 = CFX_PointF(ptCenter.x + kScrollBarTriangleQuarterLength, ptCenter.y - kScrollBarTriangleHalfLength); } else if (m_eSBButtonType == PSBT_MAX) { pt1 = CFX_PointF(ptCenter.x + kScrollBarTriangleQuarterLength, ptCenter.y); pt2 = CFX_PointF(ptCenter.x - kScrollBarTriangleQuarterLength, ptCenter.y + kScrollBarTriangleHalfLength); pt3 = CFX_PointF(ptCenter.x - kScrollBarTriangleQuarterLength, ptCenter.y - kScrollBarTriangleHalfLength); } if (rectWnd.right - rectWnd.left > kScrollBarTriangleHalfLength * 2 && rectWnd.top - rectWnd.bottom > kScrollBarTriangleHalfLength) { CFX_PathData path; path.AppendPoint(pt1, FXPT_TYPE::MoveTo, false); path.AppendPoint(pt2, FXPT_TYPE::LineTo, false); path.AppendPoint(pt3, FXPT_TYPE::LineTo, false); path.AppendPoint(pt1, FXPT_TYPE::LineTo, false); pDevice->DrawPath(&path, &mtUser2Device, nullptr, PWL_DEFAULT_BLACKCOLOR.ToFXColor(nTransparency), 0, FXFILL_ALTERNATE); } return; } // draw border pDevice->DrawStrokeRect(&mtUser2Device, rectWnd, ArgbEncode(nTransparency, 100, 100, 100), 0.0f); pDevice->DrawStrokeRect(&mtUser2Device, rectWnd.GetDeflated(0.5f, 0.5f), ArgbEncode(nTransparency, 255, 255, 255), 1.0f); if (m_eSBButtonType != PSBT_POS) { // draw background if (IsEnabled()) { pDevice->DrawShadow(&mtUser2Device, true, false, rectWnd.GetDeflated(1.0f, 1.0f), nTransparency, 80, 220); } else { pDevice->DrawFillRect(&mtUser2Device, rectWnd.GetDeflated(1.0f, 1.0f), ArgbEncode(255, 255, 255, 255)); } // draw arrow if (rectWnd.top - rectWnd.bottom > 6.0f) { float fX = rectWnd.left + 1.5f; float fY = rectWnd.bottom; std::vector<CFX_PointF> pts; if (m_eSBButtonType == PSBT_MIN) { pts.push_back(CFX_PointF(fX + 2.5f, fY + 4.0f)); pts.push_back(CFX_PointF(fX + 2.5f, fY + 3.0f)); pts.push_back(CFX_PointF(fX + 4.5f, fY + 5.0f)); pts.push_back(CFX_PointF(fX + 6.5f, fY + 3.0f)); pts.push_back(CFX_PointF(fX + 6.5f, fY + 4.0f)); pts.push_back(CFX_PointF(fX + 4.5f, fY + 6.0f)); pts.push_back(CFX_PointF(fX + 2.5f, fY + 4.0f)); } else { pts.push_back(CFX_PointF(fX + 2.5f, fY + 5.0f)); pts.push_back(CFX_PointF(fX + 2.5f, fY + 6.0f)); pts.push_back(CFX_PointF(fX + 4.5f, fY + 4.0f)); pts.push_back(CFX_PointF(fX + 6.5f, fY + 6.0f)); pts.push_back(CFX_PointF(fX + 6.5f, fY + 5.0f)); pts.push_back(CFX_PointF(fX + 4.5f, fY + 3.0f)); pts.push_back(CFX_PointF(fX + 2.5f, fY + 5.0f)); } pDevice->DrawFillArea(&mtUser2Device, pts.data(), 7, IsEnabled() ? ArgbEncode(nTransparency, 255, 255, 255) : PWL_DEFAULT_HEAVYGRAYCOLOR.ToFXColor(255)); } return; } if (IsEnabled()) { // draw shadow effect CFX_PointF ptTop = CFX_PointF(rectWnd.left, rectWnd.top - 1.0f); CFX_PointF ptBottom = CFX_PointF(rectWnd.left, rectWnd.bottom + 1.0f); ptTop.x += 1.5f; ptBottom.x += 1.5f; const FX_COLORREF refs[] = {ArgbEncode(nTransparency, 210, 210, 210), ArgbEncode(nTransparency, 220, 220, 220), ArgbEncode(nTransparency, 240, 240, 240), ArgbEncode(nTransparency, 240, 240, 240), ArgbEncode(nTransparency, 210, 210, 210), ArgbEncode(nTransparency, 180, 180, 180), ArgbEncode(nTransparency, 150, 150, 150), ArgbEncode(nTransparency, 150, 150, 150), ArgbEncode(nTransparency, 180, 180, 180), ArgbEncode(nTransparency, 210, 210, 210)}; for (FX_COLORREF ref : refs) { pDevice->DrawStrokeLine(&mtUser2Device, ptTop, ptBottom, ref, 1.0f); ptTop.x += 1.0f; ptBottom.x += 1.0f; } } else { pDevice->DrawFillRect(&mtUser2Device, rectWnd.GetDeflated(0.5f, 0.5f), ArgbEncode(255, 255, 255, 255)); } // draw friction if (rectWnd.Height() <= 8.0f) return; FX_COLORREF crStroke = ArgbEncode(nTransparency, 120, 120, 120); if (!IsEnabled()) crStroke = PWL_DEFAULT_HEAVYGRAYCOLOR.ToFXColor(255); float nFrictionWidth = 5.0f; float nFrictionHeight = 5.5f; CFX_PointF ptLeft = CFX_PointF(ptCenter.x - nFrictionWidth / 2.0f, ptCenter.y - nFrictionHeight / 2.0f + 0.5f); CFX_PointF ptRight = CFX_PointF(ptCenter.x + nFrictionWidth / 2.0f, ptCenter.y - nFrictionHeight / 2.0f + 0.5f); for (size_t i = 0; i < 3; ++i) { pDevice->DrawStrokeLine(&mtUser2Device, ptLeft, ptRight, crStroke, 1.0f); ptLeft.y += 2.0f; ptRight.y += 2.0f; } } bool CPWL_SBButton::OnLButtonDown(const CFX_PointF& point, uint32_t nFlag) { CPWL_Wnd::OnLButtonDown(point, nFlag); if (CPWL_Wnd* pParent = GetParentWindow()) pParent->NotifyLButtonDown(this, point); m_bMouseDown = true; SetCapture(); return true; } bool CPWL_SBButton::OnLButtonUp(const CFX_PointF& point, uint32_t nFlag) { CPWL_Wnd::OnLButtonUp(point, nFlag); if (CPWL_Wnd* pParent = GetParentWindow()) pParent->NotifyLButtonUp(this, point); m_bMouseDown = false; ReleaseCapture(); return true; } bool CPWL_SBButton::OnMouseMove(const CFX_PointF& point, uint32_t nFlag) { CPWL_Wnd::OnMouseMove(point, nFlag); if (CPWL_Wnd* pParent = GetParentWindow()) pParent->NotifyMouseMove(this, point); return true; } CPWL_ScrollBar::CPWL_ScrollBar(PWL_SCROLLBAR_TYPE sbType) : m_sbType(sbType), m_pMinButton(nullptr), m_pMaxButton(nullptr), m_pPosButton(nullptr), m_bMouseDown(false), m_bMinOrMax(false), m_bNotifyForever(true) {} CPWL_ScrollBar::~CPWL_ScrollBar() {} ByteString CPWL_ScrollBar::GetClassName() const { return "CPWL_ScrollBar"; } void CPWL_ScrollBar::OnCreate(CreateParams* pParamsToAdjust) { pParamsToAdjust->eCursorType = FXCT_ARROW; } void CPWL_ScrollBar::OnDestroy() { // Until cleanup takes place in the virtual destructor for CPWL_Wnd // subclasses, implement the virtual OnDestroy method that does the // cleanup first, then invokes the superclass OnDestroy ... gee, // like a dtor would. m_pMinButton.Release(); m_pMaxButton.Release(); m_pPosButton.Release(); CPWL_Wnd::OnDestroy(); } bool CPWL_ScrollBar::RePosChildWnd() { CFX_FloatRect rcClient = GetClientRect(); CFX_FloatRect rcMinButton, rcMaxButton; float fBWidth = 0; switch (m_sbType) { case SBT_HSCROLL: if (rcClient.right - rcClient.left > kButtonWidth * 2 + kPosButtonMinWidth + 2) { rcMinButton = CFX_FloatRect(rcClient.left, rcClient.bottom, rcClient.left + kButtonWidth, rcClient.top); rcMaxButton = CFX_FloatRect(rcClient.right - kButtonWidth, rcClient.bottom, rcClient.right, rcClient.top); } else { fBWidth = (rcClient.right - rcClient.left - kPosButtonMinWidth - 2) / 2; if (fBWidth > 0) { rcMinButton = CFX_FloatRect(rcClient.left, rcClient.bottom, rcClient.left + fBWidth, rcClient.top); rcMaxButton = CFX_FloatRect(rcClient.right - fBWidth, rcClient.bottom, rcClient.right, rcClient.top); } else { if (!SetVisible(false)) return false; } } break; case SBT_VSCROLL: if (IsFloatBigger(rcClient.top - rcClient.bottom, kButtonWidth * 2 + kPosButtonMinWidth + 2)) { rcMinButton = CFX_FloatRect(rcClient.left, rcClient.top - kButtonWidth, rcClient.right, rcClient.top); rcMaxButton = CFX_FloatRect(rcClient.left, rcClient.bottom, rcClient.right, rcClient.bottom + kButtonWidth); } else { fBWidth = (rcClient.top - rcClient.bottom - kPosButtonMinWidth - 2) / 2; if (IsFloatBigger(fBWidth, 0)) { rcMinButton = CFX_FloatRect(rcClient.left, rcClient.top - fBWidth, rcClient.right, rcClient.top); rcMaxButton = CFX_FloatRect(rcClient.left, rcClient.bottom, rcClient.right, rcClient.bottom + fBWidth); } else { if (!SetVisible(false)) return false; } } break; } ObservedPtr thisObserved(this); if (m_pMinButton) { m_pMinButton->Move(rcMinButton, true, false); if (!thisObserved) return false; } if (m_pMaxButton) { m_pMaxButton->Move(rcMaxButton, true, false); if (!thisObserved) return false; } if (!MovePosButton(false)) return false; return true; } void CPWL_ScrollBar::DrawThisAppearance(CFX_RenderDevice* pDevice, const CFX_Matrix& mtUser2Device) { CFX_FloatRect rectWnd = GetWindowRect(); if (IsVisible() && !rectWnd.IsEmpty()) { pDevice->DrawFillRect(&mtUser2Device, rectWnd, GetBackgroundColor(), GetTransparency()); pDevice->DrawStrokeLine( &mtUser2Device, CFX_PointF(rectWnd.left + 2.0f, rectWnd.top - 2.0f), CFX_PointF(rectWnd.left + 2.0f, rectWnd.bottom + 2.0f), ArgbEncode(GetTransparency(), 100, 100, 100), 1.0f); pDevice->DrawStrokeLine( &mtUser2Device, CFX_PointF(rectWnd.right - 2.0f, rectWnd.top - 2.0f), CFX_PointF(rectWnd.right - 2.0f, rectWnd.bottom + 2.0f), ArgbEncode(GetTransparency(), 100, 100, 100), 1.0f); } } bool CPWL_ScrollBar::OnLButtonDown(const CFX_PointF& point, uint32_t nFlag) { CPWL_Wnd::OnLButtonDown(point, nFlag); if (HasFlag(PWS_AUTOTRANSPARENT)) { if (GetTransparency() != 255) { SetTransparency(255); if (!InvalidateRect(nullptr)) return true; } } CFX_FloatRect rcMinArea, rcMaxArea; if (m_pPosButton && m_pPosButton->IsVisible()) { CFX_FloatRect rcClient = GetClientRect(); CFX_FloatRect rcPosButton = m_pPosButton->GetWindowRect(); switch (m_sbType) { case SBT_HSCROLL: rcMinArea = CFX_FloatRect(rcClient.left + kButtonWidth, rcClient.bottom, rcPosButton.left, rcClient.top); rcMaxArea = CFX_FloatRect(rcPosButton.right, rcClient.bottom, rcClient.right - kButtonWidth, rcClient.top); break; case SBT_VSCROLL: rcMinArea = CFX_FloatRect(rcClient.left, rcPosButton.top, rcClient.right, rcClient.top - kButtonWidth); rcMaxArea = CFX_FloatRect(rcClient.left, rcClient.bottom + kButtonWidth, rcClient.right, rcPosButton.bottom); break; } rcMinArea.Normalize(); rcMaxArea.Normalize(); if (rcMinArea.Contains(point)) { m_sData.SubBig(); if (!MovePosButton(true)) return true; NotifyScrollWindow(); } if (rcMaxArea.Contains(point)) { m_sData.AddBig(); if (!MovePosButton(true)) return true; NotifyScrollWindow(); } } return true; } bool CPWL_ScrollBar::OnLButtonUp(const CFX_PointF& point, uint32_t nFlag) { CPWL_Wnd::OnLButtonUp(point, nFlag); if (HasFlag(PWS_AUTOTRANSPARENT)) { if (GetTransparency() != PWL_SCROLLBAR_TRANSPARENCY) { SetTransparency(PWL_SCROLLBAR_TRANSPARENCY); if (!InvalidateRect(nullptr)) return true; } } EndTimer(); m_bMouseDown = false; return true; } void CPWL_ScrollBar::SetScrollInfo(const PWL_SCROLL_INFO& info) { if (info == m_OriginInfo) return; m_OriginInfo = info; float fMax = std::max(0.0f, info.fContentMax - info.fContentMin - info.fPlateWidth); SetScrollRange(0, fMax, info.fPlateWidth); SetScrollStep(info.fBigStep, info.fSmallStep); } void CPWL_ScrollBar::SetScrollPosition(float pos) { switch (m_sbType) { case SBT_HSCROLL: pos = pos - m_OriginInfo.fContentMin; break; case SBT_VSCROLL: pos = m_OriginInfo.fContentMax - pos; break; } SetScrollPos(pos); } void CPWL_ScrollBar::NotifyLButtonDown(CPWL_Wnd* child, const CFX_PointF& pos) { if (child == m_pMinButton) OnMinButtonLBDown(pos); else if (child == m_pMaxButton) OnMaxButtonLBDown(pos); else if (child == m_pPosButton) OnPosButtonLBDown(pos); } void CPWL_ScrollBar::NotifyLButtonUp(CPWL_Wnd* child, const CFX_PointF& pos) { if (child == m_pMinButton) OnMinButtonLBUp(pos); else if (child == m_pMaxButton) OnMaxButtonLBUp(pos); else if (child == m_pPosButton) OnPosButtonLBUp(pos); } void CPWL_ScrollBar::NotifyMouseMove(CPWL_Wnd* child, const CFX_PointF& pos) { if (child == m_pMinButton) OnMinButtonMouseMove(pos); else if (child == m_pMaxButton) OnMaxButtonMouseMove(pos); else if (child == m_pPosButton) OnPosButtonMouseMove(pos); } void CPWL_ScrollBar::CreateButtons(const CreateParams& cp) { CreateParams scp = cp; scp.pParentWnd = this; scp.dwBorderWidth = 2; scp.nBorderStyle = BorderStyle::BEVELED; scp.dwFlags = PWS_VISIBLE | PWS_CHILD | PWS_BORDER | PWS_BACKGROUND | PWS_NOREFRESHCLIP; if (!m_pMinButton) { m_pMinButton = new CPWL_SBButton(m_sbType, PSBT_MIN); m_pMinButton->Create(scp); } if (!m_pMaxButton) { m_pMaxButton = new CPWL_SBButton(m_sbType, PSBT_MAX); m_pMaxButton->Create(scp); } if (!m_pPosButton) { m_pPosButton = new CPWL_SBButton(m_sbType, PSBT_POS); ObservedPtr thisObserved(this); if (!m_pPosButton->SetVisible(false) || !thisObserved) return; m_pPosButton->Create(scp); } } float CPWL_ScrollBar::GetScrollBarWidth() const { if (!IsVisible()) return 0; return PWL_SCROLLBAR_WIDTH; } void CPWL_ScrollBar::SetScrollRange(float fMin, float fMax, float fClientWidth) { if (!m_pPosButton) return; m_sData.SetScrollRange(fMin, fMax); m_sData.SetClientWidth(fClientWidth); ObservedPtr thisObserved(this); if (IsFloatSmaller(m_sData.ScrollRange.GetWidth(), 0.0f)) { m_pPosButton->SetVisible(false); // Note, |this| may no longer be viable at this point. If more work needs // to be done, check thisObserved. return; } if (!m_pPosButton->SetVisible(true) || !thisObserved) return; MovePosButton(true); // Note, |this| may no longer be viable at this point. If more work needs // to be done, check the return value of MovePosButton(). } void CPWL_ScrollBar::SetScrollPos(float fPos) { float fOldPos = m_sData.fScrollPos; m_sData.SetPos(fPos); if (!IsFloatEqual(m_sData.fScrollPos, fOldPos)) { MovePosButton(true); // Note, |this| may no longer be viable at this point. If more work needs // to be done, check the return value of MovePosButton(). } } void CPWL_ScrollBar::SetScrollStep(float fBigStep, float fSmallStep) { m_sData.SetBigStep(fBigStep); m_sData.SetSmallStep(fSmallStep); } bool CPWL_ScrollBar::MovePosButton(bool bRefresh) { ASSERT(m_pMinButton); ASSERT(m_pMaxButton); if (m_pPosButton->IsVisible()) { CFX_FloatRect rcClient; CFX_FloatRect rcPosArea, rcPosButton; rcClient = GetClientRect(); rcPosArea = GetScrollArea(); float fLeft, fRight, fTop, fBottom; switch (m_sbType) { case SBT_HSCROLL: fLeft = TrueToFace(m_sData.fScrollPos); fRight = TrueToFace(m_sData.fScrollPos + m_sData.fClientWidth); if (fRight - fLeft < kPosButtonMinWidth) fRight = fLeft + kPosButtonMinWidth; if (fRight > rcPosArea.right) { fRight = rcPosArea.right; fLeft = fRight - kPosButtonMinWidth; } rcPosButton = CFX_FloatRect(fLeft, rcPosArea.bottom, fRight, rcPosArea.top); break; case SBT_VSCROLL: fBottom = TrueToFace(m_sData.fScrollPos + m_sData.fClientWidth); fTop = TrueToFace(m_sData.fScrollPos); if (IsFloatSmaller(fTop - fBottom, kPosButtonMinWidth)) fBottom = fTop - kPosButtonMinWidth; if (IsFloatSmaller(fBottom, rcPosArea.bottom)) { fBottom = rcPosArea.bottom; fTop = fBottom + kPosButtonMinWidth; } rcPosButton = CFX_FloatRect(rcPosArea.left, fBottom, rcPosArea.right, fTop); break; } ObservedPtr thisObserved(this); m_pPosButton->Move(rcPosButton, true, bRefresh); if (!thisObserved) return false; } return true; } void CPWL_ScrollBar::OnMinButtonLBDown(const CFX_PointF& point) { m_sData.SubSmall(); if (!MovePosButton(true)) return; NotifyScrollWindow(); m_bMinOrMax = true; EndTimer(); BeginTimer(100); } void CPWL_ScrollBar::OnMinButtonLBUp(const CFX_PointF& point) {} void CPWL_ScrollBar::OnMinButtonMouseMove(const CFX_PointF& point) {} void CPWL_ScrollBar::OnMaxButtonLBDown(const CFX_PointF& point) { m_sData.AddSmall(); if (!MovePosButton(true)) return; NotifyScrollWindow(); m_bMinOrMax = false; EndTimer(); BeginTimer(100); } void CPWL_ScrollBar::OnMaxButtonLBUp(const CFX_PointF& point) {} void CPWL_ScrollBar::OnMaxButtonMouseMove(const CFX_PointF& point) {} void CPWL_ScrollBar::OnPosButtonLBDown(const CFX_PointF& point) { m_bMouseDown = true; if (m_pPosButton) { CFX_FloatRect rcPosButton = m_pPosButton->GetWindowRect(); switch (m_sbType) { case SBT_HSCROLL: m_nOldPos = point.x; m_fOldPosButton = rcPosButton.left; break; case SBT_VSCROLL: m_nOldPos = point.y; m_fOldPosButton = rcPosButton.top; break; } } } void CPWL_ScrollBar::OnPosButtonLBUp(const CFX_PointF& point) { if (m_bMouseDown) { if (!m_bNotifyForever) NotifyScrollWindow(); } m_bMouseDown = false; } void CPWL_ScrollBar::OnPosButtonMouseMove(const CFX_PointF& point) { float fOldScrollPos = m_sData.fScrollPos; float fNewPos = 0; switch (m_sbType) { case SBT_HSCROLL: if (fabs(point.x - m_nOldPos) < 1) return; fNewPos = FaceToTrue(m_fOldPosButton + point.x - m_nOldPos); break; case SBT_VSCROLL: if (fabs(point.y - m_nOldPos) < 1) return; fNewPos = FaceToTrue(m_fOldPosButton + point.y - m_nOldPos); break; } if (m_bMouseDown) { switch (m_sbType) { case SBT_HSCROLL: if (IsFloatSmaller(fNewPos, m_sData.ScrollRange.fMin)) { fNewPos = m_sData.ScrollRange.fMin; } if (IsFloatBigger(fNewPos, m_sData.ScrollRange.fMax)) { fNewPos = m_sData.ScrollRange.fMax; } m_sData.SetPos(fNewPos); break; case SBT_VSCROLL: if (IsFloatSmaller(fNewPos, m_sData.ScrollRange.fMin)) { fNewPos = m_sData.ScrollRange.fMin; } if (IsFloatBigger(fNewPos, m_sData.ScrollRange.fMax)) { fNewPos = m_sData.ScrollRange.fMax; } m_sData.SetPos(fNewPos); break; } if (!IsFloatEqual(fOldScrollPos, m_sData.fScrollPos)) { if (!MovePosButton(true)) return; if (m_bNotifyForever) NotifyScrollWindow(); } } } void CPWL_ScrollBar::NotifyScrollWindow() { CPWL_Wnd* pParent = GetParentWindow(); if (!pParent || m_sbType != SBT_VSCROLL) return; pParent->ScrollWindowVertically(m_OriginInfo.fContentMax - m_sData.fScrollPos); } CFX_FloatRect CPWL_ScrollBar::GetScrollArea() const { CFX_FloatRect rcClient = GetClientRect(); CFX_FloatRect rcArea; if (!m_pMinButton || !m_pMaxButton) return rcClient; CFX_FloatRect rcMin = m_pMinButton->GetWindowRect(); CFX_FloatRect rcMax = m_pMaxButton->GetWindowRect(); float fMinWidth = rcMin.right - rcMin.left; float fMinHeight = rcMin.top - rcMin.bottom; float fMaxWidth = rcMax.right - rcMax.left; float fMaxHeight = rcMax.top - rcMax.bottom; switch (m_sbType) { case SBT_HSCROLL: if (rcClient.right - rcClient.left > fMinWidth + fMaxWidth + 2) { rcArea = CFX_FloatRect(rcClient.left + fMinWidth + 1, rcClient.bottom, rcClient.right - fMaxWidth - 1, rcClient.top); } else { rcArea = CFX_FloatRect(rcClient.left + fMinWidth + 1, rcClient.bottom, rcClient.left + fMinWidth + 1, rcClient.top); } break; case SBT_VSCROLL: if (rcClient.top - rcClient.bottom > fMinHeight + fMaxHeight + 2) { rcArea = CFX_FloatRect(rcClient.left, rcClient.bottom + fMinHeight + 1, rcClient.right, rcClient.top - fMaxHeight - 1); } else { rcArea = CFX_FloatRect(rcClient.left, rcClient.bottom + fMinHeight + 1, rcClient.right, rcClient.bottom + fMinHeight + 1); } break; } rcArea.Normalize(); return rcArea; } float CPWL_ScrollBar::TrueToFace(float fTrue) { CFX_FloatRect rcPosArea; rcPosArea = GetScrollArea(); float fFactWidth = m_sData.ScrollRange.GetWidth() + m_sData.fClientWidth; fFactWidth = fFactWidth == 0 ? 1 : fFactWidth; float fFace = 0; switch (m_sbType) { case SBT_HSCROLL: fFace = rcPosArea.left + fTrue * (rcPosArea.right - rcPosArea.left) / fFactWidth; break; case SBT_VSCROLL: fFace = rcPosArea.top - fTrue * (rcPosArea.top - rcPosArea.bottom) / fFactWidth; break; } return fFace; } float CPWL_ScrollBar::FaceToTrue(float fFace) { CFX_FloatRect rcPosArea; rcPosArea = GetScrollArea(); float fFactWidth = m_sData.ScrollRange.GetWidth() + m_sData.fClientWidth; fFactWidth = fFactWidth == 0 ? 1 : fFactWidth; float fTrue = 0; switch (m_sbType) { case SBT_HSCROLL: fTrue = (fFace - rcPosArea.left) * fFactWidth / (rcPosArea.right - rcPosArea.left); break; case SBT_VSCROLL: fTrue = (rcPosArea.top - fFace) * fFactWidth / (rcPosArea.top - rcPosArea.bottom); break; } return fTrue; } void CPWL_ScrollBar::CreateChildWnd(const CreateParams& cp) { CreateButtons(cp); } void CPWL_ScrollBar::TimerProc() { PWL_SCROLL_PRIVATEDATA sTemp = m_sData; if (m_bMinOrMax) m_sData.SubSmall(); else m_sData.AddSmall(); if (sTemp != m_sData) { if (!MovePosButton(true)) return; NotifyScrollWindow(); } }