public void Invalidating_Child_Should_Not_Invalidate_Parent()
{
var panel = new StackPanel();
var child = new Border();
panel.Children.Add(child);
panel.Measure(new Size(double.PositiveInfinity, double.PositiveInfinity));
Assert.Equal(new Size(0, 0), panel.DesiredSize);
child.Width = 100;
child.Height = 100;
Assert.True(panel.IsMeasureValid);
Assert.False(child.IsMeasureValid);
panel.Measure(new Size(double.PositiveInfinity, double.PositiveInfinity));
Assert.Equal(new Size(0, 0), panel.DesiredSize);
}
public void Removing_From_Parent_Should_Invalidate_Measure_Of_Control_And_Descendents()
{
var panel = new StackPanel();
var child2 = new Border();
var child1 = new Border { Child = child2 };
panel.Children.Add(child1);
panel.Measure(new Size(double.PositiveInfinity, double.PositiveInfinity));
Assert.True(child1.IsMeasureValid);
Assert.True(child2.IsMeasureValid);
panel.Children.Remove(child1);
Assert.False(child1.IsMeasureValid);
Assert.False(child2.IsMeasureValid);
}
public void Lays_Out_Children_Vertically()
{
var target = new StackPanel
{
Children = new Controls
{
new Border { Height = 20, Width = 120 },
new Border { Height = 30 },
new Border { Height = 50 },
}
};
target.Measure(Size.Infinity);
target.Arrange(new Rect(target.DesiredSize));
Assert.Equal(new Size(120, 100), target.Bounds.Size);
Assert.Equal(new Rect(0, 0, 120, 20), target.Children[0].Bounds);
Assert.Equal(new Rect(0, 20, 120, 30), target.Children[1].Bounds);
Assert.Equal(new Rect(0, 50, 120, 50), target.Children[2].Bounds);
}
public void Lays_Out_Children_Horizontally()
{
var target = new StackPanel
{
Orientation = Orientation.Horizontal,
Children = new Controls
{
new Border { Width = 20, Height = 120 },
new Border { Width = 30 },
new Border { Width = 50 },
}
};
target.Measure(Size.Infinity);
target.Arrange(new Rect(target.DesiredSize));
Assert.Equal(new Size(100, 120), target.Bounds.Size);
Assert.Equal(new Rect(0, 0, 20, 120), target.Children[0].Bounds);
Assert.Equal(new Rect(20, 0, 30, 120), target.Children[1].Bounds);
Assert.Equal(new Rect(50, 0, 50, 120), target.Children[2].Bounds);
}