Make Update and DrawWidget pure virtual

These methods should be in all implementations, make them pure virtual to
make that required.

Review-Url: https://codereview.chromium.org/2525703004

4 files changed, 5 insertions, 7 deletions

diff --git a/xfa/fwl/core/ifwl_caret.cpp b/xfa/fwl/core/ifwl_caret.cpp
index 6d21ca2f77..1c228242bd 100644
--- a/xfa/fwl/core/ifwl_caret.cpp
+++ b/xfa/fwl/core/ifwl_caret.cpp
@@ -41,6 +41,8 @@ FWL_Type IFWL_Caret::GetClassID() const {
   return FWL_Type::Caret;
 }
 
+void IFWL_Caret::Update() {}
+
 void IFWL_Caret::DrawWidget(CFX_Graphics* pGraphics,
                             const CFX_Matrix* pMatrix) {
   if (!pGraphics)
diff --git a/xfa/fwl/core/ifwl_caret.h b/xfa/fwl/core/ifwl_caret.h
index 53fe1dd6cb..51a80911d5 100644
--- a/xfa/fwl/core/ifwl_caret.h
+++ b/xfa/fwl/core/ifwl_caret.h
@@ -32,6 +32,7 @@ class IFWL_Caret : public IFWL_Widget {
   void OnProcessMessage(CFWL_Message* pMessage) override;
   void OnDrawWidget(CFX_Graphics* pGraphics,
                     const CFX_Matrix* pMatrix) override;
+  void Update() override;
 
   void ShowCaret(bool bFlag = true);
 
diff --git a/xfa/fwl/core/ifwl_widget.cpp b/xfa/fwl/core/ifwl_widget.cpp
index 040a57f696..a44ad975cf 100644
--- a/xfa/fwl/core/ifwl_widget.cpp
+++ b/xfa/fwl/core/ifwl_widget.cpp
@@ -171,8 +171,6 @@ void IFWL_Widget::SetStates(uint32_t dwStates, bool bSet) {
   return;
 }
 
-void IFWL_Widget::Update() {}
-
 FWL_WidgetHit IFWL_Widget::HitTest(FX_FLOAT fx, FX_FLOAT fy) {
   CFX_RectF rtClient;
   GetClientRect(rtClient);
@@ -291,9 +289,6 @@ IFWL_Widget::DataProvider* IFWL_Widget::GetDataProvider() const {
   return m_pProperties->m_pDataProvider;
 }
 
-void IFWL_Widget::DrawWidget(CFX_Graphics* pGraphics,
-                             const CFX_Matrix* pMatrix) {}
-
 void IFWL_Widget::SetThemeProvider(IFWL_ThemeProvider* pThemeProvider) {
   m_pProperties->m_pThemeProvider = pThemeProvider;
 }
diff --git a/xfa/fwl/core/ifwl_widget.h b/xfa/fwl/core/ifwl_widget.h
index 230ea666d9..7d2faf00e9 100644
--- a/xfa/fwl/core/ifwl_widget.h
+++ b/xfa/fwl/core/ifwl_widget.h
@@ -75,10 +75,10 @@ class IFWL_Widget : public IFWL_WidgetDelegate {
   virtual void ModifyStylesEx(uint32_t dwStylesExAdded,
                               uint32_t dwStylesExRemoved);
   virtual void SetStates(uint32_t dwStates, bool bSet = true);
-  virtual void Update();
+  virtual void Update() = 0;
   virtual FWL_WidgetHit HitTest(FX_FLOAT fx, FX_FLOAT fy);
   virtual void DrawWidget(CFX_Graphics* pGraphics,
-                          const CFX_Matrix* pMatrix = nullptr);
+                          const CFX_Matrix* pMatrix = nullptr) = 0;
   virtual void SetThemeProvider(IFWL_ThemeProvider* pThemeProvider);
 
   // IFWL_WidgetDelegate.