Enable text input for text input panels.

Was not explicitly enabled before (which should not have worked in SDL2
either), now is explicitly enabled when text panels have focus

Author: HeliumAnt

Source/GUI/GUIInput.cpp

@@ -1,3 +1,4 @@
+#include "GUIInput.h"
 #include "GUI.h"
 
 using namespace RTE;
@@ -148,3 +149,14 @@ void GUIInput::Update() {
 int GUIInput::GetModifier() const {
 	return m_Modifier;
 }
+
+void GUIInput::StartTextInput() {
+	m_TextInputActive++;
+}
+
+void GUIInput::StopTextInput() {
+	m_TextInputActive--;
+	if (m_TextInputActive < 0) {
+		m_TextInputActive = 0;
+	}
+}

Source/GUI/GUIInput.h

@@ -122,6 +122,12 @@ namespace RTE {
 		/// @param enableKeyJoyMouseCursor Whether the keyboard and joysticks also control the mouse or not.
 		void SetKeyJoyMouseCursor(bool enableKeyJoyMouseCursor) { m_KeyJoyMouseCursor = enableKeyJoyMouseCursor; }
 
+		/// Enables receiving text input events.
+		virtual void StartTextInput();
+
+		/// Disables receiving text input events.
+		virtual void StopTextInput();
+
 	protected:
 		enum Constants {
 			KEYBOARD_BUFFER_SIZE = 256
@@ -132,6 +138,7 @@ namespace RTE {
 		unsigned char m_ScanCodeState[KEYBOARD_BUFFER_SIZE];
 		std::string m_TextInput;
 		bool m_HasTextInput;
+		int m_TextInputActive{0};
 
 		// Mouse button states
 		// Order:    Left, Middle, Right

Source/GUI/GUITextPanel.cpp

@@ -140,6 +140,14 @@ void GUITextPanel::Draw(GUIScreen* Screen) {
 	Screen->GetBitmap()->SetClipRect(nullptr);
 }
 
+void GUITextPanel::OnGainFocus() {
+	m_Manager->GetInputController()->StartTextInput();
+}
+
+void GUITextPanel::OnLoseFocus() {
+	m_Manager->GetInputController()->StopTextInput();
+}
+
 void GUITextPanel::OnKeyPress(int KeyCode, int Modifier) {
 	// TODO: Figure out what the "performance bitching" is.
 	// Condition here to stop the compiler bitching about performance

Source/GUI/GUITextPanel.h

@@ -35,6 +35,14 @@ namespace RTE {
 		/// @param Screen Screen class
 		void Draw(GUIScreen* Screen) override;
 
+		/// Called when this panel gains focus.
+		/// Start text input events.
+		void OnGainFocus() override;
+
+		/// Called when this panel loses focus.
+		/// Stops text input events.
+		void OnLoseFocus() override;
+
 		/// Called when the mouse goes down on the panel
 		/// @param X Mouse Position, Mouse Buttons, Modifier.
 		void OnMouseDown(int X, int Y, int Buttons, int Modifier) override;
@@ -51,6 +59,7 @@ namespace RTE {
 		/// @param KeyCode KeyCode, Modifier.
 		void OnKeyPress(int KeyCode, int Modifier) override;
 
+		/// Called when text input is received
 		void OnTextInput(std::string_view inputText) override;
 
 		/// Sets the text in the textpanel.

Source/GUI/Wrappers/GUIInputWrapper.cpp

@@ -1,5 +1,7 @@
 #include "GUI.h"
 #include "GUIInputWrapper.h"
+#include "GUIInput.h"
+#include "SDL3/SDL_keyboard.h"
 #include "WindowMan.h"
 #include "FrameMan.h"
 #include "UInputMan.h"
@@ -62,6 +64,18 @@ void GUIInputWrapper::Update() {
 	m_MouseY = static_cast<int>(mousePos.GetY() / static_cast<float>(g_WindowMan.GetResMultiplier()));
 }
 
+void GUIInputWrapper::StartTextInput() {
+	GUIInput::StartTextInput();
+	SDL_StartTextInput(g_WindowMan.GetWindow());
+}
+
+void GUIInputWrapper::StopTextInput() {
+	GUIInput::StopTextInput();
+	if (m_TextInputActive <= 0) {
+		SDL_StopTextInput(g_WindowMan.GetWindow());
+	}
+}
+
 void GUIInputWrapper::UpdateKeyboardInput(float keyElapsedTime) {
 	// Clear the keyboard buffer, we need it to check for changes.
 	memset(m_KeyboardBuffer, 0, sizeof(uint8_t) * GUIInput::Constants::KEYBOARD_BUFFER_SIZE);

Source/GUI/Wrappers/GUIInputWrapper.h

@@ -29,6 +29,10 @@ namespace RTE {
 #pragma region Virtual Override Methods
 		/// Updates the input.
 		void Update() override;
+
+		void StartTextInput() override;
+
+		void StopTextInput() override;
 #pragma endregion
 
 	private: