COM3D2.MeidoPhotoStudio/src/MeidoPhotoStudio.Plugin/GUI/Windows/SceneWindow.cs

using UnityEngine;

namespace MeidoPhotoStudio.Plugin;

public class SceneWindow : BaseWindow
{
    private const float ResizeHandleSize = 15f;

    private readonly SceneManager sceneManager;
    private readonly SceneManagerTitleBarPane titleBar;
    private readonly SceneManagerDirectoryPane directoryList;
    private readonly SceneManagerScenePane sceneGrid;

    private Rect resizeHandleRect;
    private bool resizing;
    private bool visible;

    public SceneWindow(SceneManager sceneManager)
    {
        windowRect.width = Screen.width * 0.65f;
        windowRect.height = Screen.height * 0.75f;
        windowRect.x = Screen.width * 0.5f - windowRect.width * 0.5f;
        windowRect.y = Screen.height * 0.5f - windowRect.height * 0.5f;

        resizeHandleRect = new(0f, 0f, ResizeHandleSize, ResizeHandleSize);

        this.sceneManager = sceneManager;
        var sceneModalWindow = new SceneModalWindow(this.sceneManager);

        titleBar = AddPane(new SceneManagerTitleBarPane(sceneManager));
        titleBar.CloseChange += (_, _) =>
            Visible = false;

        directoryList = AddPane(new SceneManagerDirectoryPane(sceneManager, sceneModalWindow));

        sceneGrid = AddPane(new SceneManagerScenePane(sceneManager, sceneModalWindow));
    }

    public override bool Visible
    {
        get => visible;
        set
        {
            visible = value;

            if (visible && !sceneManager.Initialized)
                sceneManager.Initialize();
        }
    }

    public override void GUIFunc(int id)
    {
        HandleResize();
        Draw();

        if (!resizing)
            GUI.DragWindow();
    }

    public override void Update()
    {
        base.Update();

        if (InputManager.GetKeyDown(MpsKey.OpenSceneManager))
            Visible = !Visible;
    }

    public override void Deactivate() =>
        Visible = false;

    public override void Draw()
    {
        GUI.enabled = !SceneManager.Busy && !Modal.Visible;

        GUILayout.BeginArea(new(10f, 10f, windowRect.width - 20f, windowRect.height - 20f));

        titleBar.Draw();

        GUILayout.BeginHorizontal();
        directoryList.Draw();
        sceneGrid.Draw();
        GUILayout.EndHorizontal();

        GUILayout.EndArea();

        GUI.Box(resizeHandleRect, GUIContent.none);
    }

    private void HandleResize()
    {
        resizeHandleRect.x = windowRect.width - ResizeHandleSize;
        resizeHandleRect.y = windowRect.height - ResizeHandleSize;

        if (!resizing && Input.GetMouseButton(0) && resizeHandleRect.Contains(Event.current.mousePosition))
            resizing = true;

        if (resizing)
        {
            var rectWidth = Event.current.mousePosition.x;
            var rectHeight = Event.current.mousePosition.y;

            var minWidth = Utility.GetPix(
                SceneManagerDirectoryPane.ListWidth + (int)(SceneManager.SceneDimensions.x
                * SceneManagerScenePane.ThumbnailScale));

            windowRect.width = Mathf.Max(minWidth, rectWidth);
            windowRect.height = Mathf.Max(300, rectHeight);

            if (!Input.GetMouseButton(0))
                resizing = false;
        }
    }
}