public static void DrawComponent(Rect rect, WindowComponent component, int customKey)
{
var key = UnityEngine.UI.Windows.Utilities.UIWSMath.GetKey(component.GetHashCode(), customKey);
if (Event.current.type == EventType.MouseUp ||
Event.current.type == EventType.MouseDown ||
Event.current.type == EventType.MouseMove)
{
if (WindowLayoutUtilities.tempPreviewTimers.ContainsKey(key) == true)
{
WindowLayoutUtilities.tempPreviewTimers[key] = 0d;
}
}
if (Event.current.type == EventType.Repaint)
{
if (WindowLayoutUtilities.tempPreviewTimers.TryGetValue(key, out var timer) == true)
{
if (EditorApplication.timeSinceStartup - timer > 100d)
{
if (WindowLayoutUtilities.tempPreviewRects.TryGetValue(key, out var bufferRect) == true)
{
if (Mathf.Abs(rect.width - bufferRect.width) > 1f ||
Mathf.Abs(rect.height - bufferRect.height) > 1f)
{
WindowLayoutUtilities.tempPreviewRects.Remove(key);
if (WindowLayoutUtilities.tempPreviewBuffer.TryGetValue(key, out var t) == true)
{
Object.DestroyImmediate(t);
}
WindowLayoutUtilities.tempPreviewBuffer.Remove(key);
WindowLayoutUtilities.tempPreviewTimers.Remove(key);
}
}
}
}
}
if (WindowLayoutUtilities.tempPreviewBuffer.TryGetValue(key, out var buffer) == true)
{
EditorGUI.DrawTextureTransparent(rect, buffer, ScaleMode.ScaleToFit);
}
else if (Event.current.type == EventType.Repaint)
{
var camera = new GameObject("Camera", typeof(Camera));
camera.hideFlags = HideFlags.HideAndDontSave;
var cameraInstance = camera.GetComponent <Camera>();
var canvas = new GameObject("Canvas", typeof(Canvas), typeof(UnityEngine.UI.CanvasScaler));
canvas.hideFlags = HideFlags.HideAndDontSave;
var instance = Object.Instantiate(component, canvas.transform);
instance.gameObject.hideFlags = HideFlags.HideAndDontSave;
instance.SetTransformAs(component.transform as RectTransform);
var canvasInstance = canvas.GetComponent <Canvas>();
canvasInstance.renderMode = RenderMode.ScreenSpaceCamera;
canvasInstance.worldCamera = cameraInstance;
cameraInstance.clearFlags = CameraClearFlags.Depth;
var canvases = canvas.GetComponentsInChildren <Canvas>();
foreach (var c in canvases)
{
c.enabled = false;
}
var canvasScaler = canvas.GetComponent <UnityEngine.UI.CanvasScaler>();
canvasScaler.uiScaleMode = UnityEngine.UI.CanvasScaler.ScaleMode.ScaleWithScreenSize;
canvasScaler.referenceResolution = new Vector2(rect.width, 0f);
canvasScaler.screenMatchMode = UnityEngine.UI.CanvasScaler.ScreenMatchMode.MatchWidthOrHeight;
canvasScaler.matchWidthOrHeight = 0f;
var type = canvasScaler.GetType();
var binds = System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.NonPublic;
type.GetField("m_Canvas", binds).SetValue(canvasScaler, canvasInstance);
type.GetMethod("Handle", binds).Invoke(canvasScaler, null);
Canvas.ForceUpdateCanvases();
var rt = new RenderTexture((int)rect.width, (int)rect.height, 32, RenderTextureFormat.ARGB32);
WindowLayoutUtilities.tempPreviewBuffer.Add(key, rt);
WindowLayoutUtilities.tempPreviewRects.Add(key, rect);
WindowLayoutUtilities.tempPreviewTimers.Add(key, EditorApplication.timeSinceStartup);
cameraInstance.Render();
EditorApplication.delayCall += () => {
foreach (var c in canvases)
{
c.enabled = true;
}
cameraInstance.targetTexture = rt;
cameraInstance.Render();
cameraInstance.targetTexture = null;
foreach (var c in canvases)
{
c.enabled = false;
}
EditorApplication.delayCall += () => {
GameObject.DestroyImmediate(camera);
GameObject.DestroyImmediate(canvas);
};
};
}
}
