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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
#include "fpdfsdk/pwl/cpwl_scroll_bar.h"
#include <algorithm>
#include <sstream>
#include <utility>
#include <vector>
#include "core/fxge/cfx_fillrenderoptions.h"
#include "core/fxge/cfx_pathdata.h"
#include "core/fxge/cfx_renderdevice.h"
#include "fpdfsdk/pwl/cpwl_wnd.h"
#include "third_party/base/check.h"
#include "third_party/base/stl_util.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)
void PWL_FLOATRANGE::Reset() {
fMin = 0.0f;
fMax = 0.0f;
}
void PWL_FLOATRANGE::Set(float min, float max) {
fMin = std::min(min, max);
fMax = std::max(min, 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.Reset();
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(
const CreateParams& cp,
std::unique_ptr<IPWL_SystemHandler::PerWindowData> pAttachedData,
PWL_SCROLLBAR_TYPE eScrollBarType,
PWL_SBBUTTON_TYPE eButtonType)
: CPWL_Wnd(cp, std::move(pAttachedData)),
m_eScrollBarType(eScrollBarType),
m_eSBButtonType(eButtonType) {
GetCreationParams()->eCursorType = FXCT_ARROW;
}
CPWL_SBButton::~CPWL_SBButton() = default;
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);
path.AppendPoint(pt2, FXPT_TYPE::LineTo);
path.AppendPoint(pt3, FXPT_TYPE::LineTo);
path.AppendPoint(pt1, FXPT_TYPE::LineTo);
pDevice->DrawPath(&path, &mtUser2Device, nullptr,
PWL_DEFAULT_BLACKCOLOR.ToFXColor(nTransparency), 0,
CFX_FillRenderOptions::EvenOddOptions());
}
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;
static constexpr float kOffsetsX[] = {2.5f, 2.5f, 4.5f, 6.5f,
6.5f, 4.5f, 2.5f};
static constexpr float kOffsetsY[] = {5.0f, 6.0f, 4.0f, 6.0f,
5.0f, 3.0f, 5.0f};
static constexpr float kOffsetsMinY[] = {4.0f, 3.0f, 5.0f, 3.0f,
4.0f, 6.0f, 4.0f};
static_assert(pdfium::size(kOffsetsX) == pdfium::size(kOffsetsY),
"Wrong offset count");
static_assert(pdfium::size(kOffsetsX) == pdfium::size(kOffsetsMinY),
"Wrong offset count");
const float* pOffsetsY =
m_eSBButtonType == PSBT_MIN ? kOffsetsMinY : kOffsetsY;
for (size_t i = 0; i < pdfium::size(kOffsetsX); ++i)
pts.push_back(CFX_PointF(fX + kOffsetsX[i], fY + pOffsetsY[i]));
pDevice->DrawFillArea(mtUser2Device, pts,
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(uint32_t nFlag, const CFX_PointF& point) {
CPWL_Wnd::OnLButtonDown(nFlag, point);
if (CPWL_Wnd* pParent = GetParentWindow())
pParent->NotifyLButtonDown(this, point);
m_bMouseDown = true;
SetCapture();
return true;
}
bool CPWL_SBButton::OnLButtonUp(uint32_t nFlag, const CFX_PointF& point) {
CPWL_Wnd::OnLButtonUp(nFlag, point);
if (CPWL_Wnd* pParent = GetParentWindow())
pParent->NotifyLButtonUp(this, point);
m_bMouseDown = false;
ReleaseCapture();
return true;
}
bool CPWL_SBButton::OnMouseMove(uint32_t nFlag, const CFX_PointF& point) {
CPWL_Wnd::OnMouseMove(nFlag, point);
if (CPWL_Wnd* pParent = GetParentWindow())
pParent->NotifyMouseMove(this, point);
return true;
}
CPWL_ScrollBar::CPWL_ScrollBar(
const CreateParams& cp,
std::unique_ptr<IPWL_SystemHandler::PerWindowData> pAttachedData,
PWL_SCROLLBAR_TYPE sbType)
: CPWL_Wnd(cp, std::move(pAttachedData)), m_sbType(sbType) {
GetCreationParams()->eCursorType = FXCT_ARROW;
}
CPWL_ScrollBar::~CPWL_ScrollBar() = default;
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<CPWL_ScrollBar> 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(uint32_t nFlag, const CFX_PointF& point) {
CPWL_Wnd::OnLButtonDown(nFlag, point);
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(uint32_t nFlag, const CFX_PointF& point) {
CPWL_Wnd::OnLButtonUp(nFlag, point);
if (HasFlag(PWS_AUTOTRANSPARENT)) {
if (GetTransparency() != PWL_SCROLLBAR_TRANSPARENCY) {
SetTransparency(PWL_SCROLLBAR_TRANSPARENCY);
if (!InvalidateRect(nullptr))
return true;
}
}
m_pTimer.reset();
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.dwBorderWidth = 2;
scp.nBorderStyle = BorderStyle::kBeveled;
scp.dwFlags =
PWS_VISIBLE | PWS_CHILD | PWS_BORDER | PWS_BACKGROUND | PWS_NOREFRESHCLIP;
if (!m_pMinButton) {
auto pButton = std::make_unique<CPWL_SBButton>(scp, CloneAttachedData(),
m_sbType, PSBT_MIN);
m_pMinButton = pButton.get();
AddChild(std::move(pButton));
m_pMinButton->Realize();
}
if (!m_pMaxButton) {
auto pButton = std::make_unique<CPWL_SBButton>(scp, CloneAttachedData(),
m_sbType, PSBT_MAX);
m_pMaxButton = pButton.get();
AddChild(std::move(pButton));
m_pMaxButton->Realize();
}
if (!m_pPosButton) {
auto pButton = std::make_unique<CPWL_SBButton>(scp, CloneAttachedData(),
m_sbType, PSBT_POS);
m_pPosButton = pButton.get();
ObservedPtr<CPWL_ScrollBar> thisObserved(this);
if (m_pPosButton->SetVisible(false) && thisObserved) {
AddChild(std::move(pButton));
m_pPosButton->Realize();
}
}
}
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;
ObservedPtr<CPWL_ScrollBar> thisObserved(this);
m_sData.SetScrollRange(fMin, fMax);
m_sData.SetClientWidth(fClientWidth);
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) {
DCHECK(m_pMinButton);
DCHECK(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<CPWL_ScrollBar> 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;
m_pTimer = std::make_unique<CFX_Timer>(GetTimerHandler(), this, 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;
m_pTimer = std::make_unique<CFX_Timer>(GetTimerHandler(), this, 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.Width();
float fMinHeight = rcMin.Height();
float fMaxWidth = rcMax.Width();
float fMaxHeight = rcMax.Height();
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::OnTimerFired() {
PWL_SCROLL_PRIVATEDATA sTemp = m_sData;
if (m_bMinOrMax)
m_sData.SubSmall();
else
m_sData.AddSmall();
if (sTemp == m_sData)
return;
if (!MovePosButton(true))
return;
NotifyScrollWindow();
}