关键节点

editor/app/Features/Scene/SceneViewportToolOverlay.h

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+#pragma once
+
+#include "Scene/SceneToolState.h"
+#include "Rendering/Host/HostFwd.h"
+
+#include <XCEngine/UI/DrawData.h>
+#include <XCEngine/UI/Types.h>
+
+#include <array>
+#include <cstddef>
+#include <cstdint>
+#include <filesystem>
+#include <string>
+
+namespace XCEngine::UI::Editor::App {
+
+inline constexpr std::size_t kSceneViewportToolOverlayInvalidIndex =
+    static_cast<std::size_t>(-1);
+
+enum class SceneViewportToggleButtonKind : std::uint8_t {
+    Pivot = 0,
+    Space
+};
+
+struct SceneViewportToggleButtonFrame {
+    SceneViewportToggleButtonKind kind = SceneViewportToggleButtonKind::Pivot;
+    ::XCEngine::UI::UIRect rect = {};
+    std::string label = {};
+    bool active = false;
+    bool hovered = false;
+    bool pressed = false;
+};
+
+struct SceneViewportToggleOverlayFrame {
+    bool visible = false;
+    ::XCEngine::UI::UIRect panelRect = {};
+    std::array<SceneViewportToggleButtonFrame, 2> buttons = {};
+};
+
+struct SceneViewportToolOverlayButtonFrame {
+    SceneToolMode mode = SceneToolMode::View;
+    ::XCEngine::UI::UIRect rect = {};
+    ::XCEngine::UI::UITextureHandle texture = {};
+    const char* label = "";
+    bool active = false;
+    bool hovered = false;
+    bool pressed = false;
+};
+
+struct SceneViewportToolOverlayFrame {
+    bool visible = false;
+    ::XCEngine::UI::UIRect clipRect = {};
+    SceneViewportToggleOverlayFrame toggleFrame = {};
+    ::XCEngine::UI::UIRect panelRect = {};
+    std::array<SceneViewportToolOverlayButtonFrame, 5> buttons = {};
+};
+
+class SceneViewportToolOverlay {
+public:
+    bool Initialize(
+        const std::filesystem::path& repoRoot,
+        Rendering::Host::UiTextureHost& renderer);
+    void Shutdown(Rendering::Host::UiTextureHost& renderer);
+    void ResetFrame();
+
+    void BuildFrame(
+        const ::XCEngine::UI::UIRect& viewportRect,
+        const ::XCEngine::UI::UIRect& topBarRect,
+        const ::XCEngine::UI::UIRect& clipRect,
+        SceneToolMode activeMode,
+        SceneToolPivotMode pivotMode,
+        SceneToolSpaceMode spaceMode,
+        std::size_t hoveredIndex,
+        std::size_t pressedIndex,
+        std::size_t hoveredToggleIndex,
+        std::size_t pressedToggleIndex);
+
+    std::size_t HitTest(const ::XCEngine::UI::UIPoint& point) const;
+    std::size_t HitTestToggle(const ::XCEngine::UI::UIPoint& point) const;
+    bool Contains(const ::XCEngine::UI::UIPoint& point) const;
+
+    const SceneViewportToolOverlayFrame& GetFrame() const;
+
+private:
+    struct ToolTextureSet {
+        SceneToolMode mode = SceneToolMode::View;
+        const char* label = "";
+        ::XCEngine::UI::UITextureHandle inactiveTexture = {};
+        ::XCEngine::UI::UITextureHandle activeTexture = {};
+    };
+
+    std::array<ToolTextureSet, 5> m_toolTextures = {};
+    SceneViewportToolOverlayFrame m_frame = {};
+};
+
+void AppendSceneViewportToolOverlay(
+    ::XCEngine::UI::UIDrawList& drawList,
+    const SceneViewportToolOverlayFrame& frame);
+
+} // namespace XCEngine::UI::Editor::App