public void Only_Calls_LayoutManager_InvalidateArrange_Once()
{
var target = new Mock <ILayoutManager>();
var control = new Decorator();
var root = new LayoutTestRoot
{
Child = control,
LayoutManager = target.Object,
};
root.Measure(Size.Infinity);
root.Arrange(new Rect(root.DesiredSize));
target.Invocations.Clear();
control.InvalidateArrange();
control.InvalidateArrange();
target.Verify(x => x.InvalidateArrange(control), Times.Once());
}
public void Doesnt_Measure_Non_Invalidated_Root()
{
var control = new LayoutTestControl();
var root = new LayoutTestRoot {
Child = control
};
root.LayoutManager.ExecuteInitialLayoutPass();
root.Measured = root.Arranged = false;
control.Measured = control.Arranged = false;
control.InvalidateMeasure();
root.LayoutManager.ExecuteLayoutPass();
Assert.False(root.Measured);
Assert.False(root.Arranged);
Assert.True(control.Measured);
Assert.True(control.Arranged);
}
public void LayoutManager_Should_Properly_Arrange_Visuals_Even_When_There_Are_Issues_With_Previous_Arranged()
{
var nonArrageableTargets = Enumerable.Range(1, 10).Select(_ => new LayoutTestControl()).ToArray();
var targets = Enumerable.Range(1, 10).Select(_ => new LayoutTestControl()).ToArray();
StackPanel panel;
var root = new LayoutTestRoot
{
Child = panel = new StackPanel()
};
panel.Children.AddRange(nonArrageableTargets);
panel.Children.AddRange(targets);
root.LayoutManager.ExecuteInitialLayoutPass();
foreach (var c in panel.Children.OfType <LayoutTestControl>())
{
c.Measured = c.Arranged = false;
c.InvalidateMeasure();
}
foreach (var c in nonArrageableTargets)
{
c.DoArrangeOverride = (l, s) =>
{
//emulate a problem in the logic of a control that triggers
//invalidate measure during arrange
c.InvalidateMeasure();
return(new Size(100, 100));
};
}
root.LayoutManager.ExecuteLayoutPass();
//altough nonArrageableTargets has rubbish logic and can't be measured/arranged properly
//layoutmanager should process properly other visuals
Assert.All(targets, c => Assert.True(c.Arranged));
}
public void Arranges_Root_With_DesiredSize()
{
var root = new LayoutTestRoot
{
Width = 100,
Height = 100,
};
var arrangeSize = default(Size);
root.DoArrangeOverride = (_, s) =>
{
arrangeSize = s;
return(s);
};
root.LayoutManager.ExecuteInitialLayoutPass();
Assert.Equal(new Size(100, 100), arrangeSize);
root.Width = 120;
root.LayoutManager.ExecuteLayoutPass();
Assert.Equal(new Size(120, 100), arrangeSize);
}