Merge IFWL and CFWL classes.

xfa/fwl/core/cfwl_datetimepicker.cpp

 // 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/core/cfwl_datetimepicker.h"
 
 #include <memory>
+#include <utility>
 
 #include "third_party/base/ptr_util.h"
-#include "xfa/fwl/core/fwl_error.h"
-#include "xfa/fwl/core/ifwl_datetimepicker.h"
-#include "xfa/fwl/core/ifwl_widget.h"
+#include "xfa/fwl/core/cfwl_evteditchanged.h"
+#include "xfa/fwl/core/cfwl_evtselectchanged.h"
+#include "xfa/fwl/core/cfwl_formproxy.h"
+#include "xfa/fwl/core/cfwl_msgmouse.h"
+#include "xfa/fwl/core/cfwl_msgsetfocus.h"
+#include "xfa/fwl/core/cfwl_notedriver.h"
+#include "xfa/fwl/core/cfwl_spinbutton.h"
+#include "xfa/fwl/core/cfwl_themebackground.h"
+#include "xfa/fwl/core/cfwl_widgetmgr.h"
+#include "xfa/fwl/core/ifwl_themeprovider.h"
 
 namespace {
 
-IFWL_DateTimePicker* ToDateTimePicker(IFWL_Widget* widget) {
-  return static_cast<IFWL_DateTimePicker*>(widget);
-}
+const int kDateTimePickerWidth = 100;
+const int kDateTimePickerHeight = 20;
 
 }  // namespace
-
 CFWL_DateTimePicker::CFWL_DateTimePicker(const CFWL_App* app)
-    : CFWL_Widget(app) {}
-
-CFWL_DateTimePicker::~CFWL_DateTimePicker() {}
-
-void CFWL_DateTimePicker::Initialize() {
-  ASSERT(!m_pIface);
-
-  m_pIface = pdfium::MakeUnique<IFWL_DateTimePicker>(
-      m_pApp, pdfium::MakeUnique<CFWL_WidgetProperties>());
-
-  CFWL_Widget::Initialize();
-}
-
-int32_t CFWL_DateTimePicker::CountSelRanges() {
-  return ToDateTimePicker(GetWidget())->CountSelRanges();
-}
-
-int32_t CFWL_DateTimePicker::GetSelRange(int32_t nIndex, int32_t& nStart) {
-  return ToDateTimePicker(GetWidget())->GetSelRange(nIndex, nStart);
-}
-
-void CFWL_DateTimePicker::GetEditText(CFX_WideString& wsText) {
-  ToDateTimePicker(GetWidget())->GetEditText(wsText);
-}
-
-void CFWL_DateTimePicker::SetEditText(const CFX_WideString& wsText) {
-  ToDateTimePicker(GetWidget())->SetEditText(wsText);
+    : CFWL_Widget(app, pdfium::MakeUnique<CFWL_WidgetProperties>(), nullptr),
+      m_iBtnState(1),
+      m_iYear(-1),
+      m_iMonth(-1),
+      m_iDay(-1),
+      m_bLBtnDown(false) {
+  m_rtBtn.Set(0, 0, 0, 0);
+
+  m_pProperties->m_dwStyleExes = FWL_STYLEEXT_DTP_ShortDateFormat;
+
+  auto monthProp = pdfium::MakeUnique<CFWL_WidgetProperties>();
+  monthProp->m_dwStyles = FWL_WGTSTYLE_Popup | FWL_WGTSTYLE_Border;
+  monthProp->m_dwStates = FWL_WGTSTATE_Invisible;
+  monthProp->m_pParent = this;
+  monthProp->m_pThemeProvider = m_pProperties->m_pThemeProvider;
+  m_pMonthCal.reset(
+      new CFWL_MonthCalendar(m_pOwnerApp, std::move(monthProp), this));
+
+  CFX_RectF rtMonthCal;
+  m_pMonthCal->GetWidgetRect(rtMonthCal, true);
+  rtMonthCal.Set(0, 0, rtMonthCal.width, rtMonthCal.height);
+  m_pMonthCal->SetWidgetRect(rtMonthCal);
+
+  auto editProp = pdfium::MakeUnique<CFWL_WidgetProperties>();
+  editProp->m_pParent = this;
+  editProp->m_pThemeProvider = m_pProperties->m_pThemeProvider;
+
+  m_pEdit.reset(new CFWL_DateTimeEdit(m_pOwnerApp, std::move(editProp), this));
+  RegisterEventTarget(m_pMonthCal.get());
+  RegisterEventTarget(m_pEdit.get());
+}
+
+CFWL_DateTimePicker::~CFWL_DateTimePicker() {
+  UnregisterEventTarget();
+}
+
+FWL_Type CFWL_DateTimePicker::GetClassID() const {
+  return FWL_Type::DateTimePicker;
+}
+
+void CFWL_DateTimePicker::GetWidgetRect(CFX_RectF& rect, bool bAutoSize) {
+  if (m_pWidgetMgr->IsFormDisabled()) {
+    DisForm_GetWidgetRect(rect, bAutoSize);
+    return;
+  }
+  if (!bAutoSize) {
+    rect = m_pProperties->m_rtWidget;
+    return;
+  }
+
+  rect.Set(0, 0, kDateTimePickerWidth, kDateTimePickerHeight);
+  CFWL_Widget::GetWidgetRect(rect, true);
+}
+
+void CFWL_DateTimePicker::Update() {
+  if (m_pWidgetMgr->IsFormDisabled()) {
+    DisForm_Update();
+    return;
+  }
+  if (m_iLock)
+    return;
+  if (!m_pProperties->m_pThemeProvider)
+    m_pProperties->m_pThemeProvider = GetAvailableTheme();
+
+  m_pEdit->SetThemeProvider(m_pProperties->m_pThemeProvider);
+  GetClientRect(m_rtClient);
+  FX_FLOAT* pFWidth = static_cast<FX_FLOAT*>(
+      GetThemeCapacity(CFWL_WidgetCapacity::ScrollBarWidth));
+  if (!pFWidth)
+    return;
+
+  FX_FLOAT fBtn = *pFWidth;
+  m_rtBtn.Set(m_rtClient.right() - fBtn, m_rtClient.top, fBtn - 1,
+              m_rtClient.height - 1);
+
+  CFX_RectF rtEdit;
+  rtEdit.Set(m_rtClient.left, m_rtClient.top, m_rtClient.width - fBtn,
+             m_rtClient.height);
+  m_pEdit->SetWidgetRect(rtEdit);
+  ResetEditAlignment();
+  m_pEdit->Update();
+  if (!(m_pMonthCal->GetThemeProvider()))
+    m_pMonthCal->SetThemeProvider(m_pProperties->m_pThemeProvider);
+
+  CFX_RectF rtMonthCal;
+  m_pMonthCal->GetWidgetRect(rtMonthCal, true);
+  CFX_RectF rtPopUp;
+  rtPopUp.Set(rtMonthCal.left, rtMonthCal.top + kDateTimePickerHeight,
+              rtMonthCal.width, rtMonthCal.height);
+  m_pMonthCal->SetWidgetRect(rtPopUp);
+  m_pMonthCal->Update();
+  return;
+}
+
+FWL_WidgetHit CFWL_DateTimePicker::HitTest(FX_FLOAT fx, FX_FLOAT fy) {
+  if (m_pWidgetMgr->IsFormDisabled())
+    return DisForm_HitTest(fx, fy);
+  if (m_rtClient.Contains(fx, fy))
+    return FWL_WidgetHit::Client;
+  if (IsMonthCalendarVisible()) {
+    CFX_RectF rect;
+    m_pMonthCal->GetWidgetRect(rect);
+    if (rect.Contains(fx, fy))
+      return FWL_WidgetHit::Client;
+  }
+  return FWL_WidgetHit::Unknown;
+}
+
+void CFWL_DateTimePicker::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);
+  if (!m_rtBtn.IsEmpty())
+    DrawDropDownButton(pGraphics, pTheme, pMatrix);
+  if (m_pWidgetMgr->IsFormDisabled()) {
+    DisForm_DrawWidget(pGraphics, pMatrix);
+    return;
+  }
+}
+
+void CFWL_DateTimePicker::SetThemeProvider(IFWL_ThemeProvider* pTP) {
+  m_pProperties->m_pThemeProvider = pTP;
+  m_pMonthCal->SetThemeProvider(pTP);
+}
+
+void CFWL_DateTimePicker::GetCurSel(int32_t& iYear,
+                                    int32_t& iMonth,
+                                    int32_t& iDay) {
+  iYear = m_iYear;
+  iMonth = m_iMonth;
+  iDay = m_iDay;
 }
 
 void CFWL_DateTimePicker::SetCurSel(int32_t iYear,
                                     int32_t iMonth,
                                     int32_t iDay) {
-  ToDateTimePicker(GetWidget())->SetCurSel(iYear, iMonth, iDay);
-}
-
-void CFWL_DateTimePicker::GetBBox(CFX_RectF& rect) {
-  ToDateTimePicker(GetWidget())->GetBBox(rect);
-}
-
-void CFWL_DateTimePicker::SetEditLimit(int32_t nLimit) {
-  ToDateTimePicker(GetWidget())->SetEditLimit(nLimit);
+  if (iYear <= 0 || iYear >= 3000)
+    return;
+  if (iMonth <= 0 || iMonth >= 13)
+    return;
+  if (iDay <= 0 || iDay >= 32)
+    return;
+
+  m_iYear = iYear;
+  m_iMonth = iMonth;
+  m_iDay = iDay;
+  m_pMonthCal->SetSelect(iYear, iMonth, iDay);
+}
+
+void CFWL_DateTimePicker::SetEditText(const CFX_WideString& wsText) {
+  if (!m_pEdit)
+    return;
+
+  m_pEdit->SetText(wsText);
+  Repaint(&m_rtClient);
+
+  CFWL_EvtEditChanged ev;
+  DispatchEvent(&ev);
+}
+
+void CFWL_DateTimePicker::GetEditText(CFX_WideString& wsText,
+                                      int32_t nStart,
+                                      int32_t nCount) const {
+  if (m_pEdit)
+    m_pEdit->GetText(wsText, nStart, nCount);
+}
+
+void CFWL_DateTimePicker::GetBBox(CFX_RectF& rect) const {
+  if (m_pWidgetMgr->IsFormDisabled()) {
+    DisForm_GetBBox(rect);
+    return;
+  }
+
+  rect = m_pProperties->m_rtWidget;
+  if (IsMonthCalendarVisible()) {
+    CFX_RectF rtMonth;
+    m_pMonthCal->GetWidgetRect(rtMonth);
+    rtMonth.Offset(m_pProperties->m_rtWidget.left,
+                   m_pProperties->m_rtWidget.top);
+    rect.Union(rtMonth);
+  }
 }
 
 void CFWL_DateTimePicker::ModifyEditStylesEx(uint32_t dwStylesExAdded,
                                              uint32_t dwStylesExRemoved) {
-  ToDateTimePicker(GetWidget())
-      ->ModifyEditStylesEx(dwStylesExAdded, dwStylesExRemoved);
-}
+  m_pEdit->ModifyStylesEx(dwStylesExAdded, dwStylesExRemoved);
+}
+
+void CFWL_DateTimePicker::DrawDropDownButton(CFX_Graphics* pGraphics,
+                                             IFWL_ThemeProvider* pTheme,
+                                             const CFX_Matrix* pMatrix) {
+  if ((m_pProperties->m_dwStyleExes & FWL_STYLEEXT_DTP_Spin) ==
+      FWL_STYLEEXT_DTP_Spin) {
+    return;
+  }
+
+  CFWL_ThemeBackground param;
+  param.m_pWidget = this;
+  param.m_iPart = CFWL_Part::DropDownButton;
+  param.m_dwStates = m_iBtnState;
+  param.m_pGraphics = pGraphics;
+  param.m_rtPart = m_rtBtn;
+  if (pMatrix)
+    param.m_matrix.Concat(*pMatrix);
+  pTheme->DrawBackground(&param);
+}
+
+void CFWL_DateTimePicker::FormatDateString(int32_t iYear,
+                                           int32_t iMonth,
+                                           int32_t iDay,
+                                           CFX_WideString& wsText) {
+  if ((m_pProperties->m_dwStyleExes & FWL_STYLEEXT_DTP_ShortDateFormat) ==
+      FWL_STYLEEXT_DTP_ShortDateFormat) {
+    wsText.Format(L"%d-%d-%d", iYear, iMonth, iDay);
+  } else if ((m_pProperties->m_dwStyleExes & FWL_STYLEEXT_DTP_LongDateFormat) ==
+             FWL_STYLEEXT_DTP_LongDateFormat) {
+    wsText.Format(L"%d Year %d Month %d Day", iYear, iMonth, iDay);
+  }
+}
+
+void CFWL_DateTimePicker::ShowMonthCalendar(bool bActivate) {
+  if (m_pWidgetMgr->IsFormDisabled())
+    return DisForm_ShowMonthCalendar(bActivate);
+  if (IsMonthCalendarVisible() == bActivate)
+    return;
+  if (!m_pForm)
+    InitProxyForm();
+
+  if (!bActivate) {
+    m_pForm->EndDoModal();
+    return;
+  }
+
+  CFX_RectF rtMonth;
+  m_pMonthCal->GetWidgetRect(rtMonth);
+
+  CFX_RectF rtAnchor;
+  rtAnchor.Set(0, 0, m_pProperties->m_rtWidget.width,
+               m_pProperties->m_rtWidget.height);
+  GetPopupPos(0, rtMonth.height, rtAnchor, rtMonth);
+  m_pForm->SetWidgetRect(rtMonth);
+
+  rtMonth.left = rtMonth.top = 0;
+  m_pMonthCal->SetStates(FWL_WGTSTATE_Invisible, !bActivate);
+  m_pMonthCal->SetWidgetRect(rtMonth);
+  m_pMonthCal->Update();
+  m_pForm->DoModal();
+}
+
+bool CFWL_DateTimePicker::IsMonthCalendarVisible() const {
+  if (m_pWidgetMgr->IsFormDisabled())
+    return DisForm_IsMonthCalendarVisible();
+  if (!m_pForm)
+    return false;
+  return !(m_pForm->GetStates() & FWL_WGTSTATE_Invisible);
+}
+
+void CFWL_DateTimePicker::ResetEditAlignment() {
+  if (!m_pEdit)
+    return;
+
+  uint32_t dwAdd = 0;
+  switch (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_DTP_EditHAlignMask) {
+    case FWL_STYLEEXT_DTP_EditHCenter: {
+      dwAdd |= FWL_STYLEEXT_EDT_HCenter;
+      break;
+    }
+    case FWL_STYLEEXT_DTP_EditHFar: {
+      dwAdd |= FWL_STYLEEXT_EDT_HFar;
+      break;
+    }
+    default: {
+      dwAdd |= FWL_STYLEEXT_EDT_HNear;
+      break;
+    }
+  }
+  switch (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_DTP_EditVAlignMask) {
+    case FWL_STYLEEXT_DTP_EditVCenter: {
+      dwAdd |= FWL_STYLEEXT_EDT_VCenter;
+      break;
+    }
+    case FWL_STYLEEXT_DTP_EditVFar: {
+      dwAdd |= FWL_STYLEEXT_EDT_VFar;
+      break;
+    }
+    default: {
+      dwAdd |= FWL_STYLEEXT_EDT_VNear;
+      break;
+    }
+  }
+  if (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_DTP_EditJustified)
+    dwAdd |= FWL_STYLEEXT_EDT_Justified;
+  if (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_DTP_EditDistributed)
+    dwAdd |= FWL_STYLEEXT_EDT_Distributed;
+
+  m_pEdit->ModifyStylesEx(dwAdd, FWL_STYLEEXT_EDT_HAlignMask |
+                                     FWL_STYLEEXT_EDT_HAlignModeMask |
+                                     FWL_STYLEEXT_EDT_VAlignMask);
+}
+
+void CFWL_DateTimePicker::ProcessSelChanged(int32_t iYear,
+                                            int32_t iMonth,
+                                            int32_t iDay) {
+  m_iYear = iYear;
+  m_iMonth = iMonth;
+  m_iDay = iDay;
+
+  CFX_WideString wsText;
+  FormatDateString(m_iYear, m_iMonth, m_iDay, wsText);
+  m_pEdit->SetText(wsText);
+  m_pEdit->Update();
+  Repaint(&m_rtClient);
+
+  CFWL_EvtSelectChanged ev;
+  ev.m_pSrcTarget = this;
+  ev.iYear = m_iYear;
+  ev.iMonth = m_iMonth;
+  ev.iDay = m_iDay;
+  DispatchEvent(&ev);
+}
+
+void CFWL_DateTimePicker::InitProxyForm() {
+  if (m_pForm)
+    return;
+  if (!m_pMonthCal)
+    return;
+
+  auto prop = pdfium::MakeUnique<CFWL_WidgetProperties>();
+  prop->m_dwStyles = FWL_WGTSTYLE_Popup;
+  prop->m_dwStates = FWL_WGTSTATE_Invisible;
+  prop->m_pOwner = this;
+
+  m_pForm = pdfium::MakeUnique<CFWL_FormProxy>(m_pOwnerApp, std::move(prop),
+                                               m_pMonthCal.get());
+  m_pMonthCal->SetParent(m_pForm.get());
+}
+
+bool CFWL_DateTimePicker::DisForm_IsMonthCalendarVisible() const {
+  if (!m_pMonthCal)
+    return false;
+  return !(m_pMonthCal->GetStates() & FWL_WGTSTATE_Invisible);
+}
+
+void CFWL_DateTimePicker::DisForm_ShowMonthCalendar(bool bActivate) {
+  if (IsMonthCalendarVisible() == bActivate)
+    return;
+
+  if (bActivate) {
+    CFX_RectF rtMonthCal;
+    m_pMonthCal->GetWidgetRect(rtMonthCal, true);
+    FX_FLOAT fPopupMin = rtMonthCal.height;
+    FX_FLOAT fPopupMax = rtMonthCal.height;
+    CFX_RectF rtAnchor(m_pProperties->m_rtWidget);
+    rtAnchor.width = rtMonthCal.width;
+    rtMonthCal.left = m_rtClient.left;
+    rtMonthCal.top = rtAnchor.Height();
+    GetPopupPos(fPopupMin, fPopupMax, rtAnchor, rtMonthCal);
+    m_pMonthCal->SetWidgetRect(rtMonthCal);
+    if (m_iYear > 0 && m_iMonth > 0 && m_iDay > 0)
+      m_pMonthCal->SetSelect(m_iYear, m_iMonth, m_iDay);
+    m_pMonthCal->Update();
+  }
+  m_pMonthCal->SetStates(FWL_WGTSTATE_Invisible, !bActivate);
+
+  if (bActivate) {
+    CFWL_MsgSetFocus msg;
+    msg.m_pDstTarget = m_pMonthCal.get();
+    msg.m_pSrcTarget = m_pEdit.get();
+    m_pEdit->GetDelegate()->OnProcessMessage(&msg);
+  }
+
+  CFX_RectF rtInvalidate, rtCal;
+  rtInvalidate.Set(0, 0, m_pProperties->m_rtWidget.width,
+                   m_pProperties->m_rtWidget.height);
+  m_pMonthCal->GetWidgetRect(rtCal);
+  rtInvalidate.Union(rtCal);
+  rtInvalidate.Inflate(2, 2);
+  Repaint(&rtInvalidate);
+}
+
+FWL_WidgetHit CFWL_DateTimePicker::DisForm_HitTest(FX_FLOAT fx,
+                                                   FX_FLOAT fy) const {
+  CFX_RectF rect;
+  rect.Set(0, 0, m_pProperties->m_rtWidget.width,
+           m_pProperties->m_rtWidget.height);
+  if (rect.Contains(fx, fy))
+    return FWL_WidgetHit::Edit;
+  if (DisForm_IsNeedShowButton())
+    rect.width += m_fBtn;
+  if (rect.Contains(fx, fy))
+    return FWL_WidgetHit::Client;
+  if (IsMonthCalendarVisible()) {
+    m_pMonthCal->GetWidgetRect(rect);
+    if (rect.Contains(fx, fy))
+      return FWL_WidgetHit::Client;
+  }
+  return FWL_WidgetHit::Unknown;
+}
+
+bool CFWL_DateTimePicker::DisForm_IsNeedShowButton() const {
+  return m_pProperties->m_dwStates & FWL_WGTSTATE_Focused ||
+         m_pMonthCal->GetStates() & FWL_WGTSTATE_Focused ||
+         m_pEdit->GetStates() & FWL_WGTSTATE_Focused;
+}
+
+void CFWL_DateTimePicker::DisForm_Update() {
+  if (m_iLock)
+    return;
+  if (!m_pProperties->m_pThemeProvider)
+    m_pProperties->m_pThemeProvider = GetAvailableTheme();
+
+  m_pEdit->SetThemeProvider(m_pProperties->m_pThemeProvider);
+  GetClientRect(m_rtClient);
+  m_pEdit->SetWidgetRect(m_rtClient);
+  ResetEditAlignment();
+  m_pEdit->Update();
+
+  if (!m_pMonthCal->GetThemeProvider())
+    m_pMonthCal->SetThemeProvider(m_pProperties->m_pThemeProvider);
+
+  FX_FLOAT* pWidth = static_cast<FX_FLOAT*>(
+      GetThemeCapacity(CFWL_WidgetCapacity::ScrollBarWidth));
+  if (!pWidth)
+    return;
+
+  m_fBtn = *pWidth;
+  CFX_RectF rtMonthCal;
+  m_pMonthCal->GetWidgetRect(rtMonthCal, true);
+
+  CFX_RectF rtPopUp;
+  rtPopUp.Set(rtMonthCal.left, rtMonthCal.top + kDateTimePickerHeight,
+              rtMonthCal.width, rtMonthCal.height);
+  m_pMonthCal->SetWidgetRect(rtPopUp);
+  m_pMonthCal->Update();
+}
+
+void CFWL_DateTimePicker::DisForm_GetWidgetRect(CFX_RectF& rect,
+                                                bool bAutoSize) {
+  rect = m_pProperties->m_rtWidget;
+  if (DisForm_IsNeedShowButton())
+    rect.width += m_fBtn;
+}
+
+void CFWL_DateTimePicker::DisForm_GetBBox(CFX_RectF& rect) const {
+  rect = m_pProperties->m_rtWidget;
+  if (DisForm_IsNeedShowButton())
+    rect.width += m_fBtn;
+  if (!IsMonthCalendarVisible())
+    return;
+
+  CFX_RectF rtMonth;
+  m_pMonthCal->GetWidgetRect(rtMonth);
+  rtMonth.Offset(m_pProperties->m_rtWidget.left, m_pProperties->m_rtWidget.top);
+  rect.Union(rtMonth);
+}
+
+void CFWL_DateTimePicker::DisForm_DrawWidget(CFX_Graphics* pGraphics,
+                                             const CFX_Matrix* pMatrix) {
+  if (!pGraphics)
+    return;
+  if (m_pEdit) {
+    CFX_RectF rtEdit;
+    m_pEdit->GetWidgetRect(rtEdit);
+
+    CFX_Matrix mt;
+    mt.Set(1, 0, 0, 1, rtEdit.left, rtEdit.top);
+    if (pMatrix)
+      mt.Concat(*pMatrix);
+    m_pEdit->DrawWidget(pGraphics, &mt);
+  }
+  if (!IsMonthCalendarVisible())
+    return;
+
+  CFX_RectF rtMonth;
+  m_pMonthCal->GetWidgetRect(rtMonth);
+  CFX_Matrix mt;
+  mt.Set(1, 0, 0, 1, rtMonth.left, rtMonth.top);
+  if (pMatrix)
+    mt.Concat(*pMatrix);
+  m_pMonthCal->DrawWidget(pGraphics, &mt);
+}
+
+void CFWL_DateTimePicker::OnProcessMessage(CFWL_Message* pMessage) {
+  if (!pMessage)
+    return;
+
+  switch (pMessage->GetClassID()) {
+    case CFWL_MessageType::SetFocus:
+      OnFocusChanged(pMessage, true);
+      break;
+    case CFWL_MessageType::KillFocus:
+      OnFocusChanged(pMessage, false);
+      break;
+    case CFWL_MessageType::Mouse: {
+      CFWL_MsgMouse* pMouse = static_cast<CFWL_MsgMouse*>(pMessage);
+      switch (pMouse->m_dwCmd) {
+        case FWL_MouseCommand::LeftButtonDown:
+          OnLButtonDown(pMouse);
+          break;
+        case FWL_MouseCommand::LeftButtonUp:
+          OnLButtonUp(pMouse);
+          break;
+        case FWL_MouseCommand::Move:
+          OnMouseMove(pMouse);
+          break;
+        case FWL_MouseCommand::Leave:
+          OnMouseLeave(pMouse);
+          break;
+        default:
+          break;
+      }
+      break;
+    }
+    case CFWL_MessageType::Key: {
+      if (m_pEdit->GetStates() & FWL_WGTSTATE_Focused) {
+        m_pEdit->GetDelegate()->OnProcessMessage(pMessage);
+        return;
+      }
+      break;
+    }
+    default:
+      break;
+  }
+
+  CFWL_Widget::OnProcessMessage(pMessage);
+}
+
+void CFWL_DateTimePicker::OnDrawWidget(CFX_Graphics* pGraphics,
+                                       const CFX_Matrix* pMatrix) {
+  DrawWidget(pGraphics, pMatrix);
+}
+
+void CFWL_DateTimePicker::OnFocusChanged(CFWL_Message* pMsg, bool bSet) {
+  if (!pMsg)
+    return;
+  if (m_pWidgetMgr->IsFormDisabled())
+    return DisForm_OnFocusChanged(pMsg, bSet);
+
+  if (bSet) {
+    m_pProperties->m_dwStates |= (FWL_WGTSTATE_Focused);
+    Repaint(&m_rtClient);
+  } else {
+    m_pProperties->m_dwStates &= ~(FWL_WGTSTATE_Focused);
+    Repaint(&m_rtClient);
+  }
+  if (pMsg->m_pSrcTarget == m_pMonthCal.get() && IsMonthCalendarVisible()) {
+    ShowMonthCalendar(false);
+  }
+  Repaint(&m_rtClient);
+}
+
+void CFWL_DateTimePicker::OnLButtonDown(CFWL_MsgMouse* pMsg) {
+  if (!pMsg)
+    return;
+  if ((m_pProperties->m_dwStates & FWL_WGTSTATE_Focused) == 0)
+    SetFocus(true);
+  if (!m_rtBtn.Contains(pMsg->m_fx, pMsg->m_fy))
+    return;
+
+  if (IsMonthCalendarVisible()) {
+    ShowMonthCalendar(false);
+    return;
+  }
+  if (!(m_pProperties->m_dwStyleExes & FWL_STYLEEXT_DTP_TimeFormat))
+    ShowMonthCalendar(true);
+
+  m_bLBtnDown = true;
+  Repaint(&m_rtClient);
+}
+
+void CFWL_DateTimePicker::OnLButtonUp(CFWL_MsgMouse* pMsg) {
+  if (!pMsg)
+    return;
+
+  m_bLBtnDown = false;
+  if (m_rtBtn.Contains(pMsg->m_fx, pMsg->m_fy))
+    m_iBtnState = CFWL_PartState_Hovered;
+  else
+    m_iBtnState = CFWL_PartState_Normal;
+  Repaint(&m_rtBtn);
+}
+
+void CFWL_DateTimePicker::OnMouseMove(CFWL_MsgMouse* pMsg) {
+  if (!m_rtBtn.Contains(pMsg->m_fx, pMsg->m_fy))
+    m_iBtnState = CFWL_PartState_Normal;
+  Repaint(&m_rtBtn);
+}
+
+void CFWL_DateTimePicker::OnMouseLeave(CFWL_MsgMouse* pMsg) {
+  if (!pMsg)
+    return;
+  m_iBtnState = CFWL_PartState_Normal;
+  Repaint(&m_rtBtn);
+}
+
+void CFWL_DateTimePicker::DisForm_OnFocusChanged(CFWL_Message* pMsg,
+                                                 bool bSet) {
+  CFX_RectF rtInvalidate(m_rtBtn);
+  if (bSet) {
+    m_pProperties->m_dwStates |= FWL_WGTSTATE_Focused;
+    if (m_pEdit && !(m_pEdit->GetStylesEx() & FWL_STYLEEXT_EDT_ReadOnly)) {
+      m_rtBtn.Set(m_pProperties->m_rtWidget.width, 0, m_fBtn,
+                  m_pProperties->m_rtWidget.height - 1);
+    }
+    rtInvalidate = m_rtBtn;
+    pMsg->m_pDstTarget = m_pEdit.get();
+    m_pEdit->GetDelegate()->OnProcessMessage(pMsg);
+  } else {
+    m_pProperties->m_dwStates &= ~FWL_WGTSTATE_Focused;
+    m_rtBtn.Set(0, 0, 0, 0);
+    if (DisForm_IsMonthCalendarVisible())
+      ShowMonthCalendar(false);
+    if (m_pEdit->GetStates() & FWL_WGTSTATE_Focused) {
+      pMsg->m_pSrcTarget = m_pEdit.get();
+      m_pEdit->GetDelegate()->OnProcessMessage(pMsg);
+    }
+  }
+  rtInvalidate.Inflate(2, 2);
+  Repaint(&rtInvalidate);
+}