GUI.Control._moveToProjectedPosition is endlessly called even on a still scene

qwiglydee · December 15, 2025, 4:41am

Also, this code of Control::_processMeasures triggers dirty observers every time the moveProjected checks measures:

packages/dev/gui/src/2D/controls/control.ts

63b8d6ac1


      
              this._postMeasure(this._tempPaddingMeasure, context);

          

              this._computeAlignment(this._tempPaddingMeasure, context);

          

              // Let children add more features

              this._additionalProcessing(this._tempPaddingMeasure, context);

          

              this._cachedParentMeasure.copyFrom(this._tempPaddingMeasure);

          

              this._currentMeasure.transformToRef(this._transformMatrix, this._evaluatedMeasure);

              if (this.onDirtyObservable.hasObservers()) {

                  this.onDirtyObservable.notifyObservers(this);

              }

          

              context.restore();

          }

          

          protected _evaluateClippingState(parentMeasure: Measure) {

              // Since transformMatrix is used here, we need to have it freshly computed

              this._transform();

              this._currentMeasure.transformToRef(this._transformMatrix, this._evaluatedMeasure);

Apparently, it is supposed to notify that _currentMeasure is changed.
But it triggers even if it’s the same.

Probably, this is a cause of another bug of infinite relayout when a line is connected to a linked control.

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GUI.Control._moveToProjectedPosition is endlessly called even on a still scene

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