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#pragma once
#include "workspace.h" // AppActions, UIContext
#include "rendering/view.h"
#include <string>
struct ImFont;
namespace Donut
{
// the workspaces and the panels they're built from.
enum class Tab { Simulation, SceneEditor, Export };
enum class Panel { Outliner, Properties, BlackHole, Settings, Export, Stats };
inline constexpr int kTabCount = 3;
inline constexpr int kPanelCount = 6;
// the application's docking shell: a main menu bar, a workspace tab strip
// ([ Simulation ] [ Scene Editor ] [ Export ]), a bottom status bar, and one
// full-viewport dock space per workspace with a pass-through centre so the
// live 3D render shows through. every workspace keeps its own dock tree and
// its own panel instances, so rearranging one never touches the others, and
// ImGui persists all of them in imgui.ini. draw() returns the View the
// RenderPath should draw this frame.
class UILayer
{
public:
UILayer();
// loads the Inter faces and registers the workspace ini section on the
// live ImGui context. call once after the device's init_imgui() and before
// the first draw(): ImGui reads imgui.ini on its first NewFrame.
auto init(float dpi_scale = 1.0f) -> void;
auto draw(const UIContext& ctx) -> View;
private:
// one workspace: a fixed centre view, its own dock tree, its own window
// instances of the panels it owns.
struct TabState
{
Tab id = Tab::Simulation;
const char* label = nullptr; // "Scene Editor"
const char* key = nullptr; // "scene": the ### suffix and dock-id salt
View view = View::BlackHole;
unsigned int dock_id = 0; // ImHashStr("donut.dock.<key>")
std::string name[kPanelCount]; // "Black Hole###scene.black_hole"
bool allowed[kPanelCount] = {}; // belongs to this workspace
bool defaults[kPanelCount] = {}; // open after a seed / reset
bool show[kPanelCount] = {}; // open right now
bool reset = false; // rebuild the tree before it's next submitted
bool appearing = false; // first frame back: panels mustn't grab focus
};
auto draw_menu_bar(const UIContext& ctx) -> void;
auto draw_tab_strip() -> void;
auto draw_status_bar(const UIContext& ctx) -> void;
auto build_layout(TabState& tab) -> void; // DockBuilder seed for one workspace
auto request_tab(int index) -> void { m_tab_request = index; }
auto sync_persisted() -> void;
auto begin_panel(TabState& tab, Panel p) -> bool;
auto draw_panel(const UIContext& ctx, TabState& tab, Panel p) -> void;
auto panel_outliner(const UIContext& ctx, TabState& tab) -> void;
auto panel_properties(const UIContext& ctx, TabState& tab) -> void;
auto panel_black_hole(const UIContext& ctx, TabState& tab) -> void;
auto panel_settings(const UIContext& ctx, TabState& tab) -> void;
auto panel_export(const UIContext& ctx, TabState& tab) -> void;
auto panel_stats(const UIContext& ctx, TabState& tab) -> void;
// styled building blocks the panels share (they need the fonts, hence members)
auto section(const char* title, bool default_open = true) -> bool; // collapsible heading
auto caption(const char* text) -> void; // muted helper text
auto segmented(const char* id, const char* const* labels, int count, int& value) -> bool;
TabState m_tabs[kTabCount];
int m_active_tab = 0; // index into m_tabs; the source of truth
int m_tab_request = -1; // one-frame programmatic strip selection
bool m_first_frame = true;
float m_dpi_scale = 1.0f; // monitor content scale (windows/linux); 1 on macos
// properties-panel gizmo op (0 = translate, 1 = scale); cast in the .cpp.
int m_gizmo_op = 0;
// settings panel.
float m_ui_scale = 1.0f;
// export panel.
bool m_exp_color = true, m_exp_redshift = false, m_exp_temperature = false, m_exp_impact = false;
int m_exp_resolution = 1, m_exp_format = 0;
int m_exp_written = 0; bool m_exp_reported = false;
// typography: two faces, sized at PushFont time (ImGui 1.92 rasterises on demand).
ImFont* m_font_body = nullptr; // Inter Regular
ImFont* m_font_heading = nullptr; // Inter SemiBold
// rolling frame-time history (ms) for the diagnostics graph.
static constexpr int kFrameHist = 120;
float m_frame_hist[kFrameHist] = {};
int m_frame_hist_i = 0;
};
}
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