Add widgets (WIP)

include/Nazara/Widgets/Canvas.inl

@@ -0,0 +1,99 @@
+// Copyright (C) 2020 Jérôme Leclercq
+// This file is part of the "Nazara Engine - Widgets module"
+// For conditions of distribution and use, see copyright notice in Config.hpp
+
+#include <Nazara/Widgets/Canvas.hpp>
+#include <Nazara/Platform/Cursor.hpp>
+#include <Nazara/Widgets/Debug.hpp>
+
+namespace Nz
+{
+	inline Canvas::Canvas(entt::registry& registry, Nz::EventHandler& eventHandler, Nz::CursorControllerHandle cursorController) :
+	m_keyboardOwner(InvalidCanvasIndex),
+	m_hoveredWidget(InvalidCanvasIndex),
+	m_registry(registry),
+	m_cursorController(cursorController)
+	{
+		m_canvas = this;
+		m_widgetParent = nullptr;
+
+		// Register ourselves as a widget to handle cursor change
+		RegisterToCanvas();
+
+		// Connect to every meaningful event
+		m_keyPressedSlot.Connect(eventHandler.OnKeyPressed, this, &Canvas::OnEventKeyPressed);
+		m_keyReleasedSlot.Connect(eventHandler.OnKeyReleased, this, &Canvas::OnEventKeyReleased);
+		m_mouseButtonPressedSlot.Connect(eventHandler.OnMouseButtonPressed, this, &Canvas::OnEventMouseButtonPressed);
+		m_mouseButtonReleasedSlot.Connect(eventHandler.OnMouseButtonReleased, this, &Canvas::OnEventMouseButtonRelease);
+		m_mouseLeftSlot.Connect(eventHandler.OnMouseLeft, this, &Canvas::OnEventMouseLeft);
+		m_mouseMovedSlot.Connect(eventHandler.OnMouseMoved, this, &Canvas::OnEventMouseMoved);
+		m_mouseWheelMovedSlot.Connect(eventHandler.OnMouseWheelMoved, this, &Canvas::OnEventMouseWheelMoved);
+		m_textEnteredSlot.Connect(eventHandler.OnTextEntered, this, &Canvas::OnEventTextEntered);
+		m_textEditedSlot.Connect(eventHandler.OnTextEdited, this, &Canvas::OnEventTextEdited);
+	}
+
+	inline Canvas::~Canvas()
+	{
+		// Destroy children explicitly because they signal us when getting destroyed, and that can't happen after our own destruction
+		DestroyChildren();
+
+		// Prevent our parent from trying to call us
+		m_canvasIndex = InvalidCanvasIndex;
+	}
+
+	inline entt::registry& Canvas::GetRegistry()
+	{
+		return m_registry;
+	}
+
+	inline const entt::registry& Canvas::GetRegistry() const
+	{
+		return m_registry;
+	}
+
+	inline void Canvas::ClearKeyboardOwner(std::size_t canvasIndex)
+	{
+		if (m_keyboardOwner == canvasIndex)
+			SetKeyboardOwner(InvalidCanvasIndex);
+	}
+
+	inline bool Canvas::IsKeyboardOwner(std::size_t canvasIndex) const
+	{
+		return m_keyboardOwner == canvasIndex;
+	}
+
+	inline void Canvas::NotifyWidgetBoxUpdate(std::size_t index)
+	{
+		WidgetEntry& entry = m_widgetEntries[index];
+
+		Nz::Vector3f pos = entry.widget->GetPosition(Nz::CoordSys::Global);
+		Nz::Vector2f size = entry.widget->GetSize();
+
+		entry.box.Set(pos.x, pos.y, pos.z, size.x, size.y, 1.f);
+	}
+
+	inline void Canvas::NotifyWidgetCursorUpdate(std::size_t index)
+	{
+		WidgetEntry& entry = m_widgetEntries[index];
+
+		entry.cursor = entry.widget->GetCursor();
+		if (m_cursorController && m_hoveredWidget == index)
+			m_cursorController->UpdateCursor(Nz::Cursor::Get(entry.cursor));
+	}
+
+	inline void Canvas::SetKeyboardOwner(std::size_t canvasIndex)
+	{
+		if (m_keyboardOwner != canvasIndex)
+		{
+			if (m_keyboardOwner != InvalidCanvasIndex)
+				m_widgetEntries[m_keyboardOwner].widget->OnFocusLost();
+
+			m_keyboardOwner = canvasIndex;
+
+			if (m_keyboardOwner != InvalidCanvasIndex)
+				m_widgetEntries[m_keyboardOwner].widget->OnFocusReceived();
+		}
+	}
+}
+
+#include <Nazara/Widgets/DebugOff.hpp>