public void AbsoluteLayoutOnMeasure()
{
tlog.Debug(tag, $"AbsoluteLayoutOnMeasure START");
flagOnMeasureOverride = false;
Assert.False(flagOnMeasureOverride, "flagOnMeasureOverride should be false initial");
LayoutItem layoutItem = new LinearLayout();
View view = new View()
{
ExcludeLayouting = false,
Size = new Size(100, 150),
Layout = new AbsoluteLayout()
};
layoutItem.AttachToOwner(view);
var testingTarget = new MyAbsoluteLayout();
Assert.IsNotNull(testingTarget, "null handle");
Assert.IsInstanceOf <AbsoluteLayout>(testingTarget, "Should be an instance of AbsoluteLayout type.");
testingTarget.AttachToOwner(view);
testingTarget.Add(layoutItem);
MeasureSpecification measureWidth = new MeasureSpecification(new LayoutLength(50.0f), MeasureSpecification.ModeType.AtMost);
MeasureSpecification measureHeight = new MeasureSpecification(new LayoutLength(50.0f), MeasureSpecification.ModeType.AtMost);
testingTarget.OnMeasureTest(measureWidth, measureHeight);
Assert.True(flagOnMeasureOverride, "AbsoluteLayout overridden method not invoked.");
testingTarget.Dispose();
tlog.Debug(tag, $"AbsoluteLayoutOnMeasure END (OK)");
}
private void InitializeViews()
{
{
SVmain = new MyScrollView(Xamarin.Forms.ScrollOrientation.Vertical);
{
ALmain = new MyAbsoluteLayout
{
HorizontalOptions = Xamarin.Forms.LayoutOptions.FillAndExpand,
VerticalOptions = Xamarin.Forms.LayoutOptions.Start,
HeightRequest = treap.itemHeight,
BackgroundColor = Xamarin.Forms.Color.LightYellow
};
{
LBend = new MyLabel("End of Results")
{
IsEnabled = false
};
var layoutMethod = BarsLayoutMethod(0);
ALmain.Children.Add(LBend, layoutMethod.Item1, layoutMethod.Item2);
}
SVmain.Content = ALmain;
}
this.Content = SVmain;
}
}
public void AbsoluteLayoutOnLayout()
{
tlog.Debug(tag, $"AbsoluteLayoutOnLayout START");
flagOnLayoutOverride = false;
Assert.False(flagOnLayoutOverride, "flagOnLayoutOverride should be false initial");
LayoutItem layoutItem = new LinearLayout();
View view = new View()
{
ExcludeLayouting = false,
Size = new Size(100, 150),
Layout = new AbsoluteLayout()
};
layoutItem.AttachToOwner(view);
var testingTarget = new MyAbsoluteLayout();
Assert.IsNotNull(testingTarget, "null handle");
Assert.IsInstanceOf <AbsoluteLayout>(testingTarget, "Should be an instance of AbsoluteLayout type.");
testingTarget.AttachToOwner(view);
testingTarget.Add(layoutItem);
testingTarget.OnLayoutTest(true, new LayoutLength(5), new LayoutLength(5), new LayoutLength(10), new LayoutLength(10));
Assert.True(flagOnLayoutOverride, "AbsoluteLayout overridden method not invoked.");
// Test with false parameter
flagOnLayoutOverride = false;
Assert.False(flagOnLayoutOverride, "flagOnLayoutOverride should be false initial");
testingTarget.OnLayoutTest(false, new LayoutLength(5), new LayoutLength(5), new LayoutLength(10), new LayoutLength(10));
Assert.True(flagOnLayoutOverride, "AbsoluteLayout overridden method not invoked with false parameter.");
testingTarget.Dispose();
tlog.Debug(tag, $"AbsoluteLayoutOnLayout END (OK)");
}
private bool UpdateLayout()
{
HashSet <DataType> remain = new HashSet <DataType>();
foreach (var p in ChildrenInUse)
{
remain.Add(p.Key);
}
bool answer = false;
SVmain.BatchBegin();
treap.Query(treap.Count, new Action <Treap <DataType> .TreapNode>((o) =>
{
MyAbsoluteLayout.SetLayoutBounds(LBend, BarsLayoutMethod(o.QueryYOffset()).Item1);
ALmain.HeightRequest = o.QueryYOffset() + treap.itemHeight;
}));
if (treap.Count > 0)
{
double difference = 0;
int l = UponIndex(), r = DownIndex();
for (int i = l; i <= r; i++)
{
treap.Query(i, new Action <Treap <DataType> .TreapNode>((o) =>
{
var targetBound = BarsLayoutMethod(o.QueryYOffset());
GenericView view = null;
if (ChildrenInUse.ContainsKey(o.data))
{
view = ChildrenInUse[o.data];
remain.Remove(o.data);
if (i == (l + r) / 2 && view.Bounds != null)
{
difference = targetBound.Item1.Y - view.Bounds.Y;
}
}
else if (!answer)
{
answer = true;
view = GetGenericView();
view.Reset(o.data);
ChildrenInUse[o.data] = view;
}
if (view != null)
{
MyAbsoluteLayout.SetLayoutBounds(view, targetBound.Item1);
}
}));
}
if (difference != 0)
{
SVmain.MyScrollY += difference;
//SVmain.ScrollToAsync(SVmain.ScrollX, SVmain.ScrollY + difference /** 1.05*/, false);
}
}
foreach (var d in remain)
{
var v = ChildrenInUse[d];
ChildrenInUse.Remove(d);
v.Reset(null);
v.IsVisible = false;
AvaiableChildrenPool.Push(v);
}
SVmain.BatchCommit();
return(answer);
}
