diff options
Diffstat (limited to 'xfa/fwl/cfwl_scrollbar.cpp')
| -rw-r--r-- | xfa/fwl/cfwl_scrollbar.cpp | 504 |
1 files changed, 504 insertions, 0 deletions
diff --git a/xfa/fwl/cfwl_scrollbar.cpp b/xfa/fwl/cfwl_scrollbar.cpp new file mode 100644 index 0000000000..d6124c6515 --- /dev/null +++ b/xfa/fwl/cfwl_scrollbar.cpp @@ -0,0 +1,504 @@ +// 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 "xfa/fwl/cfwl_scrollbar.h" + +#include <algorithm> +#include <memory> +#include <utility> + +#include "third_party/base/ptr_util.h" +#include "xfa/fwl/cfwl_messagemouse.h" +#include "xfa/fwl/cfwl_messagemousewheel.h" +#include "xfa/fwl/cfwl_notedriver.h" +#include "xfa/fwl/cfwl_themebackground.h" +#include "xfa/fwl/cfwl_themepart.h" +#include "xfa/fwl/cfwl_timerinfo.h" +#include "xfa/fwl/ifwl_themeprovider.h" + +#define FWL_SCROLLBAR_Elapse 500 +#define FWL_SCROLLBAR_MinThumb 5 + +CFWL_ScrollBar::CFWL_ScrollBar( + const CFWL_App* app, + std::unique_ptr<CFWL_WidgetProperties> properties, + CFWL_Widget* pOuter) + : CFWL_Widget(app, std::move(properties), pOuter), + m_pTimerInfo(nullptr), + m_fRangeMin(0), + m_fRangeMax(-1), + m_fPageSize(0), + m_fStepSize(0), + m_fPos(0), + m_fTrackPos(0), + m_iMinButtonState(CFWL_PartState_Normal), + m_iMaxButtonState(CFWL_PartState_Normal), + m_iThumbButtonState(CFWL_PartState_Normal), + m_iMinTrackState(CFWL_PartState_Normal), + m_iMaxTrackState(CFWL_PartState_Normal), + m_fLastTrackPos(0), + m_cpTrackPointX(0), + m_cpTrackPointY(0), + m_iMouseWheel(0), + m_bMouseDown(false), + m_fButtonLen(0), + m_bMinSize(false), + m_fMinThumb(FWL_SCROLLBAR_MinThumb), + m_Timer(this) { + m_rtClient.Reset(); + m_rtThumb.Reset(); + m_rtMinBtn.Reset(); + m_rtMaxBtn.Reset(); + m_rtMinTrack.Reset(); + m_rtMaxTrack.Reset(); +} + +CFWL_ScrollBar::~CFWL_ScrollBar() {} + +FWL_Type CFWL_ScrollBar::GetClassID() const { + return FWL_Type::ScrollBar; +} + +void CFWL_ScrollBar::Update() { + if (IsLocked()) + return; + if (!m_pProperties->m_pThemeProvider) + m_pProperties->m_pThemeProvider = GetAvailableTheme(); + + Layout(); +} + +void CFWL_ScrollBar::DrawWidget(CFX_Graphics* pGraphics, + const CFX_Matrix* pMatrix) { + if (!pGraphics) + return; + if (!m_pProperties->m_pThemeProvider) + return; + + IFWL_ThemeProvider* pTheme = m_pProperties->m_pThemeProvider; + if (HasBorder()) + DrawBorder(pGraphics, CFWL_Part::Border, pTheme, pMatrix); + if (HasEdge()) + DrawEdge(pGraphics, CFWL_Part::Edge, pTheme, pMatrix); + DrawTrack(pGraphics, pTheme, true, pMatrix); + DrawTrack(pGraphics, pTheme, false, pMatrix); + DrawArrowBtn(pGraphics, pTheme, true, pMatrix); + DrawArrowBtn(pGraphics, pTheme, false, pMatrix); + DrawThumb(pGraphics, pTheme, pMatrix); +} + +void CFWL_ScrollBar::SetTrackPos(FX_FLOAT fTrackPos) { + m_fTrackPos = fTrackPos; + CalcThumbButtonRect(m_rtThumb); + CalcMinTrackRect(m_rtMinTrack); + CalcMaxTrackRect(m_rtMaxTrack); +} + +bool CFWL_ScrollBar::DoScroll(CFWL_EventScroll::Code dwCode, FX_FLOAT fPos) { + if (dwCode == CFWL_EventScroll::Code::None) + return false; + return OnScroll(dwCode, fPos); +} + +void CFWL_ScrollBar::DrawTrack(CFX_Graphics* pGraphics, + IFWL_ThemeProvider* pTheme, + bool bLower, + const CFX_Matrix* pMatrix) { + CFWL_ThemeBackground param; + param.m_pWidget = this; + param.m_iPart = bLower ? CFWL_Part::LowerTrack : CFWL_Part::UpperTrack; + param.m_dwStates = (m_pProperties->m_dwStates & FWL_WGTSTATE_Disabled) + ? CFWL_PartState_Disabled + : (bLower ? m_iMinTrackState : m_iMaxTrackState); + param.m_pGraphics = pGraphics; + param.m_matrix.Concat(*pMatrix); + param.m_rtPart = bLower ? m_rtMinTrack : m_rtMaxTrack; + pTheme->DrawBackground(¶m); +} + +void CFWL_ScrollBar::DrawArrowBtn(CFX_Graphics* pGraphics, + IFWL_ThemeProvider* pTheme, + bool bMinBtn, + const CFX_Matrix* pMatrix) { + CFWL_ThemeBackground param; + param.m_pWidget = this; + param.m_iPart = bMinBtn ? CFWL_Part::ForeArrow : CFWL_Part::BackArrow; + param.m_dwStates = (m_pProperties->m_dwStates & FWL_WGTSTATE_Disabled) + ? CFWL_PartState_Disabled + : (bMinBtn ? m_iMinButtonState : m_iMaxButtonState); + param.m_pGraphics = pGraphics; + param.m_matrix.Concat(*pMatrix); + param.m_rtPart = bMinBtn ? m_rtMinBtn : m_rtMaxBtn; + if (param.m_rtPart.height > 0 && param.m_rtPart.width > 0) + pTheme->DrawBackground(¶m); +} + +void CFWL_ScrollBar::DrawThumb(CFX_Graphics* pGraphics, + IFWL_ThemeProvider* pTheme, + const CFX_Matrix* pMatrix) { + CFWL_ThemeBackground param; + param.m_pWidget = this; + param.m_iPart = CFWL_Part::Thumb; + param.m_dwStates = (m_pProperties->m_dwStates & FWL_WGTSTATE_Disabled) + ? CFWL_PartState_Disabled + : m_iThumbButtonState; + param.m_pGraphics = pGraphics; + param.m_matrix.Concat(*pMatrix); + param.m_rtPart = m_rtThumb; + pTheme->DrawBackground(¶m); +} + +void CFWL_ScrollBar::Layout() { + IFWL_ThemeProvider* pTheme = m_pProperties->m_pThemeProvider; + CFWL_ThemePart part; + part.m_pWidget = this; + m_fMinThumb = *static_cast<FX_FLOAT*>( + pTheme->GetCapacity(&part, CFWL_WidgetCapacity::Size)); + GetClientRect(m_rtClient); + CalcButtonLen(); + CalcMinButtonRect(m_rtMinBtn); + CalcMaxButtonRect(m_rtMaxBtn); + CalcThumbButtonRect(m_rtThumb); + CalcMinTrackRect(m_rtMinTrack); + CalcMaxTrackRect(m_rtMaxTrack); +} + +void CFWL_ScrollBar::CalcButtonLen() { + m_fButtonLen = IsVertical() ? m_rtClient.width : m_rtClient.height; + FX_FLOAT fLength = IsVertical() ? m_rtClient.height : m_rtClient.width; + if (fLength < m_fButtonLen * 2) { + m_fButtonLen = fLength / 2; + m_bMinSize = true; + } else { + m_bMinSize = false; + } +} + +void CFWL_ScrollBar::CalcMinButtonRect(CFX_RectF& rect) { + rect.left = m_rtClient.left; + rect.top = m_rtClient.top; + rect.width = IsVertical() ? m_rtClient.width : m_fButtonLen; + rect.height = IsVertical() ? m_fButtonLen : m_rtClient.height; +} + +void CFWL_ScrollBar::CalcMaxButtonRect(CFX_RectF& rect) { + rect.left = + IsVertical() ? m_rtClient.left : m_rtClient.right() - m_fButtonLen; + rect.top = IsVertical() ? m_rtClient.bottom() - m_fButtonLen : m_rtClient.top; + rect.width = IsVertical() ? m_rtClient.width : m_fButtonLen; + rect.height = IsVertical() ? m_fButtonLen : m_rtClient.height; +} + +void CFWL_ScrollBar::CalcThumbButtonRect(CFX_RectF& rect) { + if (!IsEnabled()) { + m_rtThumb.Reset(); + return; + } + if (m_bMinSize) { + m_rtThumb.Empty(); + return; + } + + FX_FLOAT fRange = m_fRangeMax - m_fRangeMin; + memset(&rect, 0, sizeof(CFX_Rect)); + if (fRange < 0) { + if (IsVertical()) + rect.Set(m_rtClient.left, m_rtMaxBtn.bottom(), m_rtClient.width, 0); + else + rect.Set(m_rtMaxBtn.right(), m_rtClient.top, 0, m_rtClient.height); + return; + } + + CFX_RectF rtClient = m_rtClient; + FX_FLOAT fLength = IsVertical() ? rtClient.height : rtClient.width; + FX_FLOAT fSize = m_fButtonLen; + fLength -= fSize * 2.0f; + if (fLength < fSize) + fLength = 0.0f; + + FX_FLOAT fThumbSize = fLength * fLength / (fRange + fLength); + fThumbSize = std::max(fThumbSize, m_fMinThumb); + + FX_FLOAT fDiff = std::max(fLength - fThumbSize, 0.0f); + FX_FLOAT fTrackPos = + std::max(std::min(m_fTrackPos, m_fRangeMax), m_fRangeMin); + if (!fRange) + return; + + FX_FLOAT iPos = fSize + fDiff * (fTrackPos - m_fRangeMin) / fRange; + rect.left = rtClient.left; + if (!IsVertical()) + rect.left += iPos; + + rect.top = rtClient.top; + if (IsVertical()) + rect.top += iPos; + + rect.width = IsVertical() ? rtClient.width : fThumbSize; + rect.height = IsVertical() ? fThumbSize : rtClient.height; +} + +void CFWL_ScrollBar::CalcMinTrackRect(CFX_RectF& rect) { + if (m_bMinSize) { + rect.Empty(); + return; + } + + FX_FLOAT fBottom = m_rtThumb.bottom(); + FX_FLOAT fRight = m_rtThumb.right(); + FX_FLOAT ix = (m_rtThumb.left + fRight) / 2; + FX_FLOAT iy = (m_rtThumb.top + fBottom) / 2; + rect.left = m_rtClient.left; + rect.top = m_rtClient.top; + bool bVertical = IsVertical(); + rect.width = bVertical ? m_rtClient.width : ix; + rect.height = bVertical ? iy : m_rtClient.height; +} + +void CFWL_ScrollBar::CalcMaxTrackRect(CFX_RectF& rect) { + if (m_bMinSize) { + rect.Empty(); + return; + } + + FX_FLOAT ix = (m_rtThumb.left + m_rtThumb.right()) / 2; + FX_FLOAT iy = (m_rtThumb.top + m_rtThumb.bottom()) / 2; + bool bVertical = IsVertical(); + rect.left = bVertical ? m_rtClient.left : ix; + rect.top = bVertical ? iy : m_rtClient.top; + rect.width = bVertical ? m_rtClient.width : m_rtClient.right() - ix; + rect.height = bVertical ? m_rtClient.bottom() - iy : m_rtClient.height; +} + +FX_FLOAT CFWL_ScrollBar::GetTrackPointPos(FX_FLOAT fx, FX_FLOAT fy) { + FX_FLOAT fDiffX = fx - m_cpTrackPointX; + FX_FLOAT fDiffY = fy - m_cpTrackPointY; + FX_FLOAT fRange = m_fRangeMax - m_fRangeMin; + FX_FLOAT fPos; + + if (IsVertical()) { + fPos = fRange * fDiffY / + (m_rtMaxBtn.top - m_rtMinBtn.bottom() - m_rtThumb.height); + } else { + fPos = fRange * fDiffX / + (m_rtMaxBtn.left - m_rtMinBtn.right() - m_rtThumb.width); + } + + fPos += m_fLastTrackPos; + return std::min(std::max(fPos, m_fRangeMin), m_fRangeMax); +} + +bool CFWL_ScrollBar::SendEvent() { + if (m_iMinButtonState == CFWL_PartState_Pressed) { + DoScroll(CFWL_EventScroll::Code::StepBackward, m_fTrackPos); + return false; + } + if (m_iMaxButtonState == CFWL_PartState_Pressed) { + DoScroll(CFWL_EventScroll::Code::StepForward, m_fTrackPos); + return false; + } + if (m_iMinTrackState == CFWL_PartState_Pressed) { + DoScroll(CFWL_EventScroll::Code::PageBackward, m_fTrackPos); + return m_rtThumb.Contains(m_cpTrackPointX, m_cpTrackPointY); + } + if (m_iMaxTrackState == CFWL_PartState_Pressed) { + DoScroll(CFWL_EventScroll::Code::PageForward, m_fTrackPos); + return m_rtThumb.Contains(m_cpTrackPointX, m_cpTrackPointY); + } + if (m_iMouseWheel) { + CFWL_EventScroll::Code dwCode = m_iMouseWheel < 0 + ? CFWL_EventScroll::Code::StepForward + : CFWL_EventScroll::Code::StepBackward; + DoScroll(dwCode, m_fTrackPos); + } + return true; +} + +bool CFWL_ScrollBar::OnScroll(CFWL_EventScroll::Code dwCode, FX_FLOAT fPos) { + CFWL_EventScroll ev(this); + ev.m_iScrollCode = dwCode; + ev.m_fPos = fPos; + DispatchEvent(&ev); + return true; +} + +void CFWL_ScrollBar::OnProcessMessage(CFWL_Message* pMessage) { + if (!pMessage) + return; + + CFWL_Message::Type type = pMessage->GetType(); + if (type == CFWL_Message::Type::Mouse) { + CFWL_MessageMouse* pMsg = static_cast<CFWL_MessageMouse*>(pMessage); + switch (pMsg->m_dwCmd) { + case FWL_MouseCommand::LeftButtonDown: + OnLButtonDown(pMsg->m_dwFlags, pMsg->m_fx, pMsg->m_fy); + break; + case FWL_MouseCommand::LeftButtonUp: + OnLButtonUp(pMsg->m_dwFlags, pMsg->m_fx, pMsg->m_fy); + break; + case FWL_MouseCommand::Move: + OnMouseMove(pMsg->m_dwFlags, pMsg->m_fx, pMsg->m_fy); + break; + case FWL_MouseCommand::Leave: + OnMouseLeave(); + break; + default: + break; + } + } else if (type == CFWL_Message::Type::MouseWheel) { + CFWL_MessageMouseWheel* pMsg = + static_cast<CFWL_MessageMouseWheel*>(pMessage); + OnMouseWheel(pMsg->m_fx, pMsg->m_fy, pMsg->m_dwFlags, pMsg->m_fDeltaX, + pMsg->m_fDeltaY); + } +} + +void CFWL_ScrollBar::OnDrawWidget(CFX_Graphics* pGraphics, + const CFX_Matrix* pMatrix) { + DrawWidget(pGraphics, pMatrix); +} + +void CFWL_ScrollBar::OnLButtonDown(uint32_t dwFlags, FX_FLOAT fx, FX_FLOAT fy) { + if (!IsEnabled()) + return; + + m_bMouseDown = true; + SetGrab(true); + m_cpTrackPointX = fx; + m_cpTrackPointY = fy; + m_fLastTrackPos = m_fTrackPos; + if (m_rtMinBtn.Contains(fx, fy)) + DoMouseDown(0, m_rtMinBtn, m_iMinButtonState, fx, fy); + else if (m_rtThumb.Contains(fx, fy)) + DoMouseDown(1, m_rtThumb, m_iThumbButtonState, fx, fy); + else if (m_rtMaxBtn.Contains(fx, fy)) + DoMouseDown(2, m_rtMaxBtn, m_iMaxButtonState, fx, fy); + else if (m_rtMinTrack.Contains(fx, fy)) + DoMouseDown(3, m_rtMinTrack, m_iMinTrackState, fx, fy); + else + DoMouseDown(4, m_rtMaxTrack, m_iMaxTrackState, fx, fy); + + if (!SendEvent()) + m_pTimerInfo = m_Timer.StartTimer(FWL_SCROLLBAR_Elapse, true); +} + +void CFWL_ScrollBar::OnLButtonUp(uint32_t dwFlags, FX_FLOAT fx, FX_FLOAT fy) { + m_pTimerInfo->StopTimer(); + m_bMouseDown = false; + DoMouseUp(0, m_rtMinBtn, m_iMinButtonState, fx, fy); + DoMouseUp(1, m_rtThumb, m_iThumbButtonState, fx, fy); + DoMouseUp(2, m_rtMaxBtn, m_iMaxButtonState, fx, fy); + DoMouseUp(3, m_rtMinTrack, m_iMinTrackState, fx, fy); + DoMouseUp(4, m_rtMaxTrack, m_iMaxTrackState, fx, fy); + SetGrab(false); +} + +void CFWL_ScrollBar::OnMouseMove(uint32_t dwFlags, FX_FLOAT fx, FX_FLOAT fy) { + DoMouseMove(0, m_rtMinBtn, m_iMinButtonState, fx, fy); + DoMouseMove(1, m_rtThumb, m_iThumbButtonState, fx, fy); + DoMouseMove(2, m_rtMaxBtn, m_iMaxButtonState, fx, fy); + DoMouseMove(3, m_rtMinTrack, m_iMinTrackState, fx, fy); + DoMouseMove(4, m_rtMaxTrack, m_iMaxTrackState, fx, fy); +} + +void CFWL_ScrollBar::OnMouseLeave() { + DoMouseLeave(0, m_rtMinBtn, m_iMinButtonState); + DoMouseLeave(1, m_rtThumb, m_iThumbButtonState); + DoMouseLeave(2, m_rtMaxBtn, m_iMaxButtonState); + DoMouseLeave(3, m_rtMinTrack, m_iMinTrackState); + DoMouseLeave(4, m_rtMaxTrack, m_iMaxTrackState); +} + +void CFWL_ScrollBar::OnMouseWheel(FX_FLOAT fx, + FX_FLOAT fy, + uint32_t dwFlags, + FX_FLOAT fDeltaX, + FX_FLOAT fDeltaY) { + m_iMouseWheel = (int32_t)fDeltaX; + SendEvent(); + m_iMouseWheel = 0; +} + +void CFWL_ScrollBar::DoMouseDown(int32_t iItem, + const CFX_RectF& rtItem, + int32_t& iState, + FX_FLOAT fx, + FX_FLOAT fy) { + if (!rtItem.Contains(fx, fy)) + return; + if (iState == CFWL_PartState_Pressed) + return; + + iState = CFWL_PartState_Pressed; + Repaint(&rtItem); +} + +void CFWL_ScrollBar::DoMouseUp(int32_t iItem, + const CFX_RectF& rtItem, + int32_t& iState, + FX_FLOAT fx, + FX_FLOAT fy) { + int32_t iNewState = + rtItem.Contains(fx, fy) ? CFWL_PartState_Hovered : CFWL_PartState_Normal; + if (iState == iNewState) + return; + + iState = iNewState; + Repaint(&rtItem); + OnScroll(CFWL_EventScroll::Code::EndScroll, m_fTrackPos); +} + +void CFWL_ScrollBar::DoMouseMove(int32_t iItem, + const CFX_RectF& rtItem, + int32_t& iState, + FX_FLOAT fx, + FX_FLOAT fy) { + if (!m_bMouseDown) { + int32_t iNewState = rtItem.Contains(fx, fy) ? CFWL_PartState_Hovered + : CFWL_PartState_Normal; + if (iState == iNewState) + return; + + iState = iNewState; + Repaint(&rtItem); + } else if ((2 == iItem) && (m_iThumbButtonState == CFWL_PartState_Pressed)) { + FX_FLOAT fPos = GetTrackPointPos(fx, fy); + m_fTrackPos = fPos; + OnScroll(CFWL_EventScroll::Code::TrackPos, fPos); + } +} + +void CFWL_ScrollBar::DoMouseLeave(int32_t iItem, + const CFX_RectF& rtItem, + int32_t& iState) { + if (iState == CFWL_PartState_Normal) + return; + + iState = CFWL_PartState_Normal; + Repaint(&rtItem); +} + +void CFWL_ScrollBar::DoMouseHover(int32_t iItem, + const CFX_RectF& rtItem, + int32_t& iState) { + if (iState == CFWL_PartState_Hovered) + return; + + iState = CFWL_PartState_Hovered; + Repaint(&rtItem); +} + +CFWL_ScrollBar::Timer::Timer(CFWL_ScrollBar* pToolTip) : CFWL_Timer(pToolTip) {} + +void CFWL_ScrollBar::Timer::Run(CFWL_TimerInfo* pTimerInfo) { + CFWL_ScrollBar* pButton = static_cast<CFWL_ScrollBar*>(m_pWidget); + + if (pButton->m_pTimerInfo) + pButton->m_pTimerInfo->StopTimer(); + + if (!pButton->SendEvent()) + pButton->m_pTimerInfo = StartTimer(0, true); +} |