Merge pull request #7554 from Popov72/scrollviewer-idealwidth-bug

ScrollViewer: Missing a fix when idealXXX used

gui/src/2D/controls/scrollViewers/scrollViewer.ts

@@ -244,8 +244,10 @@ export class ScrollViewer extends Rectangle {
     }
 
     private _buildClientSizes() {
-        this._window.parentClientWidth = this._currentMeasure.width - (this._verticalBar.isVisible || this.forceVerticalBar ? this._barSize : 0) - 2 * this.thickness;
-        this._window.parentClientHeight = this._currentMeasure.height - (this._horizontalBar.isVisible || this.forceHorizontalBar ? this._barSize : 0) - 2 * this.thickness;
+        let ratio = this.host.idealRatio;
+
+        this._window.parentClientWidth = this._currentMeasure.width - (this._verticalBar.isVisible || this.forceVerticalBar ? this._barSize * ratio : 0) - 2 * this.thickness;
+        this._window.parentClientHeight = this._currentMeasure.height - (this._horizontalBar.isVisible || this.forceHorizontalBar ? this._barSize * ratio : 0) - 2 * this.thickness;
 
         this._clientWidth = this._window.parentClientWidth;
         this._clientHeight = this._window.parentClientHeight;