public void TestWrapperStopReceivingUpdatesAfterDelayedLoadCompleted()
{
DelayedLoadTestDrawable child = null;
AddStep("add panel", () =>
{
DelayedLoadUnloadWrapper wrapper;
Child = wrapper = new DelayedLoadUnloadWrapper(() => child = new DelayedLoadTestDrawable {
RelativeSizeAxes = Axes.Both
}, 0, 1000)
{
RelativeSizeAxes = Axes.X,
Height = 128,
};
// Prevent the wrapper from receiving updates as soon as load completes, and start making it unload its contents by repositioning it offscreen.
wrapper.DelayedLoadComplete += _ =>
{
wrapper.Alpha = 0;
wrapper.Position = new Vector2(-1000);
};
});
// Check that the child is disposed when its async-load completes while the wrapper is masked away.
AddUntilStep("wait for load to begin", () => child?.LoadState == LoadState.Loading);
AddStep("allow load", () => child.AllowLoad.Set());
AddUntilStep("drawable disposed", () => child.IsDisposed);
}
public void TestUnloadedWhenAsyncLoadCompletedAndMaskedAway()
{
BasicScrollContainer scrollContainer = null;
DelayedLoadTestDrawable child = null;
AddStep("add panel", () =>
{
Child = scrollContainer = new BasicScrollContainer
{
Anchor = Anchor.Centre,
Origin = Anchor.Centre,
Size = new Vector2(128),
Child = new Container
{
RelativeSizeAxes = Axes.X,
Height = 1000,
Child = new Container
{
RelativeSizeAxes = Axes.X,
Height = 128,
Child = new DelayedLoadUnloadWrapper(() => child = new DelayedLoadTestDrawable {
RelativeSizeAxes = Axes.Both
}, 0, 1000)
{
RelativeSizeAxes = Axes.X,
Height = 128
}
}
}
};
});
// Check that the child is disposed when its async-load completes while the wrapper is masked away.
AddUntilStep("wait for load to begin", () => child?.LoadState == LoadState.Loading);
AddStep("scroll to end", () => scrollContainer.ScrollToEnd(false));
AddStep("allow load", () => child.AllowLoad.Set());
AddUntilStep("drawable disposed", () => child.IsDisposed);
Drawable lastChild = null;
AddStep("store child", () => lastChild = child);
// Check that reuse of the child is not attempted.
AddStep("scroll to start", () => scrollContainer.ScrollToStart(false));
AddStep("allow load of new child", () => child.AllowLoad.Set());
AddUntilStep("new child loaded", () => child.IsLoaded);
AddAssert("last child not loaded", () => !lastChild.IsLoaded);
}
