public override void OnGUI()
{
var controlId = EditorGUIUtility.GetControlID(kCanvasHash, FocusType.Passive);
var dropZoneId = EditorGUIUtility.GetControlID(kDropZoneHash, FocusType.Passive);
var texture = GetValue(kPreviewTexture);
var hasTexture = texture != null;
var targetTexture = (Texture)texture ?? Texture2D.whiteTexture;
Rect canvasRectViewport;
if (hasTexture)
{
var width = texture != null ? texture.width : 256;
var height = texture != null ? texture.height : 256;
var cameraPosition = GetValue(kCameraPosition);
var zoom = GetValue(kZoom);
EditorGUIXLayout.Canvas(controlId, ref cameraPosition, ref zoom, null, GUILayout.ExpandWidth(true), GUILayout.ExpandHeight(true));
canvasRectViewport = GUILayoutUtility.GetLastRect();
SetValue(kCameraPosition, cameraPosition);
SetValue(kZoom, zoom);
GUI.BeginClip(canvasRectViewport);
DelightingHelpers.PushSRGBWrite(false);
GUI.DrawTexture(EditorGUIX.GetCanvasDestinationRect(cameraPosition, zoom, width, height), targetTexture, ScaleMode.ScaleToFit);
DelightingHelpers.PopSRGBWrite();
if (Event.current.type == EventType.Repaint)
{
m_Separator.OnGUI();
if (GetValue(kOverrideReferenceZone))
{
m_Gizmo.OnGUI();
}
}
else
{
if (GetValue(kOverrideReferenceZone))
{
m_Gizmo.OnGUI();
}
m_Separator.OnGUI();
}
GUI.EndClip();
var fitCanvasToWindow = GetValue(kFitCanvasToWindow);
if (fitCanvasToWindow && Event.current.type == EventType.Repaint)
{
EditorGUIX.CancelCanvasZoom(controlId);
var widthRatio = canvasRectViewport.width / (float)width;
var heightRatio = canvasRectViewport.height / (float)height;
var widthOffset = 0f;
var heightOffset = 0f;
if (widthRatio < heightRatio)
{
zoom = widthRatio;
heightOffset = (canvasRectViewport.height - zoom * height) * 0.5f;
}
else
{
zoom = heightRatio;
widthOffset = (canvasRectViewport.width - zoom * width) * 0.5f;
}
SetValue(kZoom, zoom);
SetValue(kCameraPosition, new Vector2(widthOffset, heightOffset));
SetValue(kFitCanvasToWindow, false);
}
}
else
{
EditorGUIXLayout.DropZoneHint(Content.dropZoneLabel);
canvasRectViewport = GUILayoutUtility.GetLastRect();
}
if (EditorGUIX.DropZone(dropZoneId, canvasRectViewport, CanAcceptCallback))
{
var objs = DragAndDrop.objectReferences;
if (objs.Length > 0)
{
var path = AssetDatabase.GetAssetPath(objs[0]);
if (AssetDatabase.IsValidFolder(path))
{
SetValue(kInputFolderPath, path);
ExecuteCommand(kCmdLoadInputFolder);
}
}
}
}