Add configurable docking flag

Source/ImGui/Private/ImGuiInteroperability.cpp

@@ -3,6 +3,7 @@
 #include "ImGuiInteroperability.h"
 
 #include "ImGuiInputState.h"
+#include "ImGuiModule.h"
 #include "Utilities/Arrays.h"
 
 
@@ -429,6 +430,7 @@ namespace ImGuiInterops
 		SetFlag(IO.ConfigFlags, ImGuiConfigFlags_NavEnableKeyboard, InputState.IsKeyboardNavigationEnabled());
 		SetFlag(IO.ConfigFlags, ImGuiConfigFlags_NavEnableGamepad, InputState.IsGamepadNavigationEnabled());
 		SetFlag(IO.BackendFlags, ImGuiBackendFlags_HasGamepad, InputState.HasGamepad());
+		SetFlag(IO.ConfigFlags, ImGuiConfigFlags_DockingEnable, FImGuiModule::Get().GetProperties().IsDockingEnabled());
 		
 		// Check whether we need to draw cursor.
 		IO.MouseDrawCursor = InputState.HasMousePointer();
@@ -438,23 +440,17 @@ namespace ImGuiInterops
 		{
 			// Copy the touch position to mouse position.
 			IO.AddMousePosEvent(InputState.GetTouchPosition().X, InputState.GetTouchPosition().Y);
-			//IO.MousePos.x = InputState.GetTouchPosition().X;
-			//IO.MousePos.y = InputState.GetTouchPosition().Y;
 
 			// With touch active one frame longer than it is down, we have one frame to processed touch up.
 			IO.AddMouseButtonEvent(0, InputState.IsTouchDown());
-			//IO.MouseDown[0] = InputState.IsTouchDown();
 		}
 		else
 		{
 			// Copy the mouse position.
 			IO.AddMousePosEvent(InputState.GetMousePosition().X, InputState.GetMousePosition().Y);
-			//IO.MousePos.x = InputState.GetMousePosition().X;
-			//IO.MousePos.y = InputState.GetMousePosition().Y;
 
 			// Copy mouse wheel delta.
 			IO.AddMouseWheelEvent(0, IO.MouseWheel + InputState.GetMouseWheelDelta());
-			//IO.MouseWheel += InputState.GetMouseWheelDelta();
 		}
 	}
 }

Source/ImGui/Private/ImGuiModuleCommands.cpp

@@ -12,6 +12,7 @@ const TCHAR* const FImGuiModuleCommands::ToggleGamepadNavigation = TEXT("ImGui.T
 const TCHAR* const FImGuiModuleCommands::ToggleKeyboardInputSharing = TEXT("ImGui.ToggleKeyboardInputSharing");
 const TCHAR* const FImGuiModuleCommands::ToggleGamepadInputSharing = TEXT("ImGui.ToggleGamepadInputSharing");
 const TCHAR* const FImGuiModuleCommands::ToggleMouseInputSharing = TEXT("ImGui.ToggleMouseInputSharing");
+const TCHAR* const FImGuiModuleCommands::ToggleDockingEnabled = TEXT("ImGui.ToggleDockingEnabled");
 const TCHAR* const FImGuiModuleCommands::SetMouseInputSharing = TEXT("ImGui.SetMouseInputSharing");
 const TCHAR* const FImGuiModuleCommands::ToggleDemo = TEXT("ImGui.ToggleDemo");
 
@@ -35,6 +36,9 @@ FImGuiModuleCommands::FImGuiModuleCommands(FImGuiModuleProperties& InProperties)
 	, ToggleMouseInputSharingCommand(ToggleMouseInputSharing,
 		TEXT("Toggle ImGui mouse input sharing."),
 		FConsoleCommandDelegate::CreateRaw(this, &FImGuiModuleCommands::ToggleMouseInputSharingImpl))
+	, ToggleDockingEnabledCommand(ToggleDockingEnabled,
+		TEXT("Toggle ImGui docking."),
+		FConsoleCommandDelegate::CreateRaw(this, &FImGuiModuleCommands::ToggleDockingEnabledImpl))
 	, SetMouseInputSharingCommand(SetMouseInputSharing,
 		TEXT("Toggle ImGui mouse input sharing."),
 		FConsoleCommandWithArgsDelegate::CreateRaw(this, &FImGuiModuleCommands::SetMouseInputSharingImpl))
@@ -79,6 +83,11 @@ void FImGuiModuleCommands::ToggleMouseInputSharingImpl()
 	Properties.ToggleMouseInputSharing();
 }
 
+void FImGuiModuleCommands::ToggleDockingEnabledImpl()
+{
+	Properties.ToggleDockingEnabled();
+}
+
 void FImGuiModuleCommands::SetMouseInputSharingImpl(const TArray<FString>& Args)
 {
 	bool bIsEnabled = false;

Source/ImGui/Private/ImGuiModuleCommands.h

@@ -19,6 +19,7 @@ public:
 	static const TCHAR* const ToggleKeyboardInputSharing;
 	static const TCHAR* const ToggleGamepadInputSharing;
 	static const TCHAR* const ToggleMouseInputSharing;
+	static const TCHAR* const ToggleDockingEnabled;
 	static const TCHAR* const SetMouseInputSharing;
 	static const TCHAR* const ToggleDemo;
 
@@ -34,6 +35,7 @@ private:
 	void ToggleKeyboardInputSharingImpl();
 	void ToggleGamepadInputSharingImpl();
 	void ToggleMouseInputSharingImpl();
+	void ToggleDockingEnabledImpl();
 	void SetMouseInputSharingImpl(const TArray< FString >& Args);
 	void ToggleDemoImpl();
 
@@ -45,6 +47,7 @@ private:
 	FAutoConsoleCommand ToggleKeyboardInputSharingCommand;
 	FAutoConsoleCommand ToggleGamepadInputSharingCommand;
 	FAutoConsoleCommand ToggleMouseInputSharingCommand;
+	FAutoConsoleCommand ToggleDockingEnabledCommand;
 	FAutoConsoleCommand SetMouseInputSharingCommand;
 	FAutoConsoleCommand ToggleDemoCommand;
 };

Source/ImGui/Private/ImGuiModuleSettings.cpp

@@ -182,6 +182,15 @@ void FImGuiModuleSettings::SetToggleInputKey(const FImGuiKeyInfo& KeyInfo)
 	}
 }
 
+void FImGuiModuleSettings::SetIsDockingEnabled(bool bDockingEnabled)
+{
+	if (bIsDockingEnabled != bDockingEnabled)
+	{
+		bIsDockingEnabled = bDockingEnabled;
+		Properties.SetDockingEnabled(bDockingEnabled);
+	}
+}
+
 void FImGuiModuleSettings::SetCanvasSizeInfo(const FImGuiCanvasSizeInfo& CanvasSizeInfo)
 {
 	if (CanvasSize != CanvasSizeInfo)

Source/ImGui/Private/ImGuiModuleSettings.h

@@ -196,6 +196,12 @@ protected:
 	UPROPERTY(EditAnywhere, config, Category = "Input")
 	bool bShareMouseInput = false;
 
+	// Whether docking should be enabled.
+	// This defines initial behaviour which can be later changed using 'ImGui.ToggleDockingEnabled' command or
+	// module properties interface.
+	UPROPERTY(EditAnywhere, config, Category = "Input")
+	bool bIsDockingEnabled = true;
+	
 	// If true, then in input mode ImGui will draw its own cursor in place of the hardware one.
 	// When disabled (default) there is a noticeable difference between cursor position seen by ImGui and position on
 	// the screen. Enabling this option removes that effect but with lower frame-rates UI becomes quickly unusable.
@@ -291,6 +297,7 @@ private:
 	void SetShareMouseInput(bool bShare);
 	void SetUseSoftwareCursor(bool bUse);
 	void SetToggleInputKey(const FImGuiKeyInfo& KeyInfo);
+	void SetIsDockingEnabled(bool bDockingEnabled);
 	void SetCanvasSizeInfo(const FImGuiCanvasSizeInfo& CanvasSizeInfo);
 	void SetDPIScaleInfo(const FImGuiDPIScaleInfo& ScaleInfo);
 
@@ -309,4 +316,5 @@ private:
 	bool bShareGamepadInput = false;
 	bool bShareMouseInput = false;
 	bool bUseSoftwareCursor = false;
+	bool bIsDockingEnabled = true;
 };

Source/ImGui/Public/ImGuiModuleProperties.h

@@ -72,6 +72,15 @@ public:
 	/** Toggle ImGui demo. */
 	void ToggleDemo() { SetShowDemo(!ShowDemo()); }
 
+	/** Check whether docking is enabled. */
+	bool IsDockingEnabled() const { return bIsDockingEnabled; }
+
+	/** Set whether docking is enabled. */
+	void SetDockingEnabled(bool bDockingEnabled) { bIsDockingEnabled = bDockingEnabled; }
+
+	/** Toggle whether docking is enabled. */
+	void ToggleDockingEnabled() { SetDockingEnabled(!IsDockingEnabled()); }
+	
 	/** Adds a new font to initialize */
 	void AddCustomFont(FName FontName, TSharedPtr<ImFontConfig> Font) { CustomFonts.Emplace(FontName, Font); }
 
@@ -94,5 +103,7 @@ private:
 
 	bool bShowDemo = false;
 
+	bool bIsDockingEnabled = true;
+	
 	TMap<FName, TSharedPtr<ImFontConfig>> CustomFonts;
 };