public void attachRootWidget(Widget rootWidget)
{
_renderViewElement = new RenderObjectToWidgetAdapter <RenderBox>(
container: renderView,
debugShortDescription: "[root]",
child: rootWidget
).attachToRenderTree(buildOwner, _renderViewElement);
}
public void detachRootWidget()
{
if (this._renderViewElement == null)
{
return;
}
this.attachRootWidget(null);
this.buildOwner.buildScope(this._renderViewElement);
this.buildOwner.finalizeTree();
this.pipelineOwner.rootNode = null;
this._renderViewElement.deactivate();
this._renderViewElement.unmount();
this._renderViewElement = null;
}
public void detachRootWidget()
{
if (_renderViewElement == null)
{
return;
}
//The former widget tree must be layout first before its destruction
drawFrame();
attachRootWidget(null);
buildOwner.buildScope(_renderViewElement);
buildOwner.finalizeTree();
pipelineOwner.rootNode = null;
_renderViewElement.deactivate();
_renderViewElement.unmount();
_renderViewElement = null;
}
public RenderObjectToWidgetElement <T> attachToRenderTree(BuildOwner owner,
RenderObjectToWidgetElement <T> element)
{
if (element == null)
{
owner.lockState(() => {
element = (RenderObjectToWidgetElement <T>) this.createElement();
D.assert(element != null);
element.assignOwner(owner);
});
owner.buildScope(element, () => { element.mount(null, null); });
}
else
{
element._newWidget = this;
element.markNeedsBuild();
}
return(element);
}