public void Content_Can_Be_Offset()
{
Border content;
var target = new ScrollContentPresenter
{
CanHorizontallyScroll = true,
CanVerticallyScroll = true,
Content = content = new Border
{
Width = 150,
Height = 150,
},
};
target.UpdateChild();
target.Measure(new Size(100, 100));
target.Arrange(new Rect(0, 0, 100, 100));
target.Offset = new Vector(25, 25);
target.Measure(new Size(100, 100));
target.Arrange(new Rect(0, 0, 100, 100));
Assert.Equal(new Rect(-25, -25, 150, 150), content.Bounds);
}
public void Arrange_Should_Offset_ILogicalScrollable_Bounds_When_Logical_Scroll_Disabled()
{
var scrollable = new TestScrollable
{
IsLogicalScrollEnabled = false,
};
var target = new ScrollContentPresenter
{
CanHorizontallyScroll = true,
CanVerticallyScroll = true,
Content = scrollable,
};
target.UpdateChild();
target.Measure(new Size(100, 100));
target.Arrange(new Rect(0, 0, 100, 100));
target.Offset = new Vector(25, 25);
target.Measure(new Size(100, 100));
target.Arrange(new Rect(0, 0, 100, 100));
Assert.Equal(new Rect(-25, -25, 150, 150), scrollable.Bounds);
}
public void Changing_Content_Should_Update_State()
{
var logicalScrollable = new TestScrollable
{
Extent = new Size(100, 100),
Offset = new Vector(50, 50),
Viewport = new Size(25, 25),
};
var nonLogicalScrollable = new TestScrollable
{
IsLogicalScrollEnabled = false,
};
var target = new ScrollContentPresenter
{
CanHorizontallyScroll = true,
CanVerticallyScroll = true,
Content = logicalScrollable,
};
target.UpdateChild();
target.Measure(new Size(100, 100));
target.Arrange(new Rect(0, 0, 100, 100));
Assert.Equal(logicalScrollable.Extent, target.Extent);
Assert.Equal(logicalScrollable.Offset, target.Offset);
Assert.Equal(logicalScrollable.Viewport, target.Viewport);
Assert.Equal(new Rect(0, 0, 100, 100), logicalScrollable.Bounds);
target.Content = nonLogicalScrollable;
target.UpdateChild();
target.Measure(new Size(100, 100));
target.Arrange(new Rect(0, 0, 100, 100));
Assert.Equal(new Size(150, 150), target.Extent);
Assert.Equal(new Vector(0, 0), target.Offset);
Assert.Equal(new Size(100, 100), target.Viewport);
Assert.Equal(new Rect(0, 0, 150, 150), nonLogicalScrollable.Bounds);
target.Content = logicalScrollable;
target.UpdateChild();
target.Measure(new Size(100, 100));
target.Arrange(new Rect(0, 0, 100, 100));
Assert.Equal(logicalScrollable.Extent, target.Extent);
Assert.Equal(logicalScrollable.Offset, target.Offset);
Assert.Equal(logicalScrollable.Viewport, target.Viewport);
Assert.Equal(new Rect(0, 0, 100, 100), logicalScrollable.Bounds);
}
public void ScrollContentPresenterContentScrollTest()
{
ScrollContentPresenterTestElement content = new ScrollContentPresenterTestElement {
MeasureSize = new Size(100, 50), ExtentSize = new Size(400, 200)
};
ScrollContentPresenter scrollContentPresenter = new ScrollContentPresenter {
Width = 200, Height = 100, IsRootElement = true
};
content.ViewportSize = scrollContentPresenter.RenderSize;
scrollContentPresenter.Measure(Size.Infinity);
scrollContentPresenter.Arrange(new Rect(scrollContentPresenter.DesiredSize));
scrollContentPresenter.Content = content;
Assert.AreEqual(new Size(100, 50), scrollContentPresenter.ExtentSize);
scrollContentPresenter.CanContentScroll = true;
Assert.AreEqual(new Size(400, 200), scrollContentPresenter.ExtentSize);
Assert.AreEqual(new Size(200, 100), content.PreviousAvailableSize);
Assert.IsFalse(content.CanHorizontallyScroll);
Assert.IsFalse(content.CanVerticallyScroll);
scrollContentPresenter.CanHorizontallyScroll = true;
Assert.AreEqual(new Size(Double.PositiveInfinity, 100), content.PreviousAvailableSize);
Assert.IsTrue(content.CanHorizontallyScroll);
Assert.IsFalse(content.CanVerticallyScroll);
scrollContentPresenter.CanVerticallyScroll = true;
Assert.AreEqual(new Size(Double.PositiveInfinity, Double.PositiveInfinity), content.PreviousAvailableSize);
Assert.IsTrue(content.CanHorizontallyScroll);
Assert.IsTrue(content.CanVerticallyScroll);
}
public void Extent_Width_Should_Be_Arrange_Width_When_CanScrollHorizontally_False()
{
var child = new WrapPanel
{
Children =
{
new Border {
Width = 40, Height = 50
},
new Border {
Width = 40, Height = 50
},
new Border {
Width = 40, Height = 50
},
}
};
var target = new ScrollContentPresenter
{
Content = child,
CanHorizontallyScroll = false,
};
target.UpdateChild();
target.Measure(Size.Infinity);
target.Arrange(new Rect(0, 0, 100, 100));
Assert.Equal(new Size(100, 100), target.Extent);
}
public void ArrangeUpdatesOwner()
{
ScrollViewer viewer = new ScrollViewer {
HorizontalScrollBarVisibility = ScrollBarVisibility.Visible,
VerticalScrollBarVisibility = ScrollBarVisibility.Visible
};
viewer.Content = ContentControlWithChild();
TestPanel.Width = 100;
TestPanel.Height = 100;
CreateAsyncTest(viewer, () => {
ScrollContentPresenter p = Find <ScrollContentPresenter> (viewer, "ScrollContentPresenter");
Assert.AreEqual(new Size(50, 50), new Size(p.ExtentWidth, p.ExtentHeight), "#1");
Assert.AreEqual(new Size(73, 73), new Size(p.ViewportWidth, p.ViewportHeight), "#2");
Assert.AreEqual(new Size(50, 50), new Size(viewer.ExtentWidth, viewer.ExtentHeight), "#3");
Assert.AreEqual(new Size(73, 73), new Size(viewer.ViewportWidth, viewer.ViewportHeight), "#4");
p.Measure(new Size(40, 40));
p.Arrange(new Rect(0, 0, 22, 22));
Assert.AreEqual(new Size(50, 50), new Size(p.ExtentWidth, p.ExtentHeight), "#5");
Assert.AreEqual(new Size(17, 17), new Size(p.ViewportWidth, p.ViewportHeight), "#6");
Assert.AreEqual(new Size(50, 50), new Size(viewer.ExtentWidth, viewer.ExtentHeight), "#7");
Assert.AreEqual(new Size(17, 17), new Size(viewer.ViewportWidth, viewer.ViewportHeight), "#8");
});
}
public void Measure_ExtraSize_SmallerArrange_Scrollable()
{
var child = ContentControlWithChild();
var presenter = new ScrollContentPresenter {
CanHorizontallyScroll = true,
CanVerticallyScroll = true,
ScrollOwner = new ScrollViewer(),
Content = child
};
presenter.Measure(new Size(100, 100));
presenter.Arrange(new Rect(0, 0, 25, 25));
Assert.IsTrue(child.IsArranged, "#b");
Assert.AreEqual(new Size(50, 50), child.ArrangeOverrideArg, "#e");
Assert.AreEqual(new Size(50, 50), child.ArrangeOverrideArg, "#f");
Assert.AreEqual(50, presenter.ActualHeight, "#1");
Assert.AreEqual(50, presenter.ActualWidth, "#2");
Assert.AreEqual(50, presenter.ExtentHeight, "#3");
Assert.AreEqual(50, presenter.ExtentWidth, "#4");
Assert.AreEqual(50, presenter.ViewportHeight, "#5");
Assert.AreEqual(50, presenter.ViewportWidth, "#6");
Assert.AreEqual(new Size(50, 50), presenter.RenderSize, "#7");
}
public void ScrollOffsetChangesDiscarded_NonScrollable()
{
// Offset changes are ignored when the presenter is non-scrollable
var child = ContentControlWithChild(200, 200);
ScrollContentPresenter presenter = new ScrollContentPresenter {
Content = child,
Width = 100,
Height = 100,
CanHorizontallyScroll = false,
CanVerticallyScroll = false,
ScrollOwner = new ScrollViewer()
};
presenter.SetHorizontalOffset(50);
presenter.SetVerticalOffset(50);
presenter.CanHorizontallyScroll = true;
presenter.CanVerticallyScroll = true;
presenter.Measure(new Size(100, 100));
presenter.Arrange(new Rect(0, 0, 100, 100));
Assert.AreEqual(0, presenter.HorizontalOffset, "#3");
Assert.AreEqual(0, presenter.VerticalOffset, "#4");
}
public void BringDescendantIntoView_Should_Handle_Child_Margin()
{
Border border;
var target = new ScrollContentPresenter
{
CanHorizontallyScroll = true,
CanVerticallyScroll = true,
Width = 100,
Height = 100,
Content = new Decorator
{
Margin = new Thickness(50),
Child = border = new Border
{
Width = 200,
Height = 200,
}
}
};
target.UpdateChild();
target.Measure(Size.Infinity);
target.Arrange(new Rect(0, 0, 100, 100));
target.BringDescendantIntoView(border, new Rect(200, 200, 0, 0));
Assert.Equal(new Vector(150, 150), target.Offset);
}
public void Alignment_And_Padding_Are_Applied_To_Child_Bounds(
HorizontalAlignment h,
VerticalAlignment v,
double expectedX,
double expectedY,
double expectedWidth,
double expectedHeight)
{
Border content;
var target = new ScrollContentPresenter
{
Padding = new Thickness(10),
Content = content = new Border
{
MinWidth = 16,
MinHeight = 16,
HorizontalAlignment = h,
VerticalAlignment = v,
},
};
target.UpdateChild();
target.Measure(new Size(100, 100));
target.Arrange(new Rect(0, 0, 100, 100));
Assert.Equal(new Rect(expectedX, expectedY, expectedWidth, expectedHeight), content.Bounds);
}
public void MeasureTest_NoOwner()
{
var child = ContentControlWithChild();
var presenter = new ScrollContentPresenter {
Content = child
};
Assert.AreEqual(0, VisualTreeHelper.GetChildrenCount(presenter));
presenter.Measure(new Size(100, 100));
Assert.AreEqual(1, VisualTreeHelper.GetChildrenCount(presenter));
presenter.Arrange(new Rect(0, 0, 100, 100));
Assert.IsTrue(child.IsMeasured, "#a");
Assert.IsTrue(child.IsArranged, "#b");
Assert.AreEqual(new Size(100, 100), child.MeasureOverrideArg, "#c");
Assert.AreEqual(new Size(50, 50), child.MeasureOverrideResult, "#d");
Assert.AreEqual(new Size(100, 100), child.ArrangeOverrideArg, "#e");
Assert.AreEqual(new Size(100, 100), child.ArrangeOverrideArg, "#f");
Assert.AreEqual(100, presenter.ActualHeight, "#1");
Assert.AreEqual(100, presenter.ActualWidth, "#2");
Assert.AreEqual(0, presenter.ExtentHeight, "#3");
Assert.AreEqual(0, presenter.ExtentWidth, "#4");
Assert.AreEqual(0, presenter.ViewportHeight, "#5");
Assert.AreEqual(0, presenter.ViewportWidth, "#6");
Assert.AreEqual(new Size(100, 100), presenter.RenderSize, "#7");
}
public void Arrange_Should_Constrain_Child_Width_When_CanHorizontallyScroll_False()
{
var child = new WrapPanel
{
Children =
{
new Border {
Width = 40, Height = 50
},
new Border {
Width = 40, Height = 50
},
new Border {
Width = 40, Height = 50
},
}
};
var target = new ScrollContentPresenter
{
Content = child,
CanHorizontallyScroll = false,
};
target.UpdateChild();
target.Measure(Size.Infinity);
target.Arrange(new Rect(0, 0, 100, 100));
Assert.Equal(100, child.Bounds.Width);
}
public void Toggling_IsLogicalScrollEnabled_Should_Update_State()
{
var scrollable = new TestScrollable
{
Extent = new Size(100, 100),
Offset = new Vector(50, 50),
Viewport = new Size(25, 25),
};
var target = new ScrollContentPresenter
{
CanHorizontallyScroll = true,
CanVerticallyScroll = true,
Content = scrollable,
};
target.UpdateChild();
target.Measure(new Size(100, 100));
target.Arrange(new Rect(0, 0, 100, 100));
Assert.Equal(scrollable.Extent, target.Extent);
Assert.Equal(scrollable.Offset, target.Offset);
Assert.Equal(scrollable.Viewport, target.Viewport);
Assert.Equal(new Rect(0, 0, 100, 100), scrollable.Bounds);
scrollable.IsLogicalScrollEnabled = false;
scrollable.RaiseScrollInvalidated(EventArgs.Empty);
target.Measure(new Size(100, 100));
target.Arrange(new Rect(0, 0, 100, 100));
Assert.Equal(new Size(150, 150), target.Extent);
Assert.Equal(new Vector(0, 0), target.Offset);
Assert.Equal(new Size(100, 100), target.Viewport);
Assert.Equal(new Rect(0, 0, 150, 150), scrollable.Bounds);
scrollable.IsLogicalScrollEnabled = true;
scrollable.RaiseScrollInvalidated(EventArgs.Empty);
target.Measure(new Size(100, 100));
target.Arrange(new Rect(0, 0, 100, 100));
Assert.Equal(scrollable.Extent, target.Extent);
Assert.Equal(scrollable.Offset, target.Offset);
Assert.Equal(scrollable.Viewport, target.Viewport);
Assert.Equal(new Rect(0, 0, 100, 100), scrollable.Bounds);
}
public void Content_Can_Be_Larger_Than_Viewport()
{
TestControl content;
var target = new ScrollContentPresenter
{
Content = content = new TestControl(),
};
target.Measure(new Size(100, 100));
target.Arrange(new Rect(0, 0, 100, 100));
Assert.Equal(new Rect(0, 0, 150, 150), content.Bounds);
}
public void Should_Correctly_Arrange_Child_Larger_Than_Viewport()
{
var child = new Canvas {
MinWidth = 150, MinHeight = 150
};
var target = new ScrollContentPresenter {
Content = child,
};
target.UpdateChild();
target.Measure(Size.Infinity);
target.Arrange(new Rect(0, 0, 100, 100));
Assert.Equal(new Size(150, 150), child.Bounds.Size);
}
public void Setting_Offset_Should_Invalidate_Arrange()
{
var target = new ScrollContentPresenter
{
Content = new Border {
Width = 140, Height = 150
}
};
target.Measure(new Size(100, 100));
target.Arrange(new Rect(0, 0, 100, 100));
target.Offset = new Vector(10, 100);
Assert.True(target.IsMeasureValid);
Assert.False(target.IsArrangeValid);
}
public void Content_Can_Be_Larger_Than_Viewport()
{
TestControl content;
var target = new ScrollContentPresenter
{
CanHorizontallyScroll = true,
CanVerticallyScroll = true,
Content = content = new TestControl(),
};
target.UpdateChild();
target.Measure(new Size(100, 100));
target.Arrange(new Rect(0, 0, 100, 100));
Assert.Equal(new Rect(0, 0, 150, 150), content.Bounds);
}
public void Content_Can_Be_Stretched()
{
Border content;
var target = new ScrollContentPresenter
{
Content = content = new Border
{
Padding = new Thickness(8),
},
};
target.Measure(new Size(100, 100));
target.Arrange(new Rect(0, 0, 100, 100));
Assert.Equal(new Rect(0, 0, 100, 100), content.Bounds);
}
public void Content_Can_Be_Bottom_Aligned()
{
Border content;
var target = new ScrollContentPresenter
{
Content = content = new Border
{
Padding = new Thickness(8),
VerticalAlignment = VerticalAlignment.Bottom,
},
};
target.Measure(new Size(100, 100));
target.Arrange(new Rect(0, 0, 100, 100));
Assert.Equal(new Rect(0, 84, 100, 16), content.Bounds);
}
public void Content_Can_Be_Right_Aligned()
{
Border content;
var target = new ScrollContentPresenter
{
Content = content = new Border
{
Padding = new Thickness(8),
HorizontalAlignment = HorizontalAlignment.Right
},
};
target.Measure(new Size(100, 100));
target.Arrange(new Rect(0, 0, 100, 100));
Assert.Equal(new Rect(84, 0, 16, 100), content.Bounds);
}
public void Arrange_Should_Not_Set_Viewport_And_Extent_With_IScrollable()
{
var target = new ScrollContentPresenter
{
Content = new TestScrollable()
};
var changed = false;
target.Measure(new Size(100, 100));
target.GetObservable(ScrollViewer.ViewportProperty).Skip(1).Subscribe(_ => changed = true);
target.GetObservable(ScrollViewer.ExtentProperty).Skip(1).Subscribe(_ => changed = true);
target.Arrange(new Rect(0, 0, 100, 100));
Assert.False(changed);
}
public void Extent_Should_Include_Content_Margin()
{
var target = new ScrollContentPresenter
{
Content = new Border
{
Width = 100,
Height = 100,
Margin = new Thickness(5),
}
};
target.UpdateChild();
target.Measure(new Size(50, 50));
target.Arrange(new Rect(0, 0, 50, 50));
Assert.Equal(new Size(110, 110), target.Extent);
}
public void DesiredSize_Is_AvailableSize_When_Content_Larger_Than_AvailableSize()
{
var target = new ScrollContentPresenter
{
Padding = new Thickness(10),
Content = new Border
{
MinWidth = 160,
MinHeight = 160,
},
};
target.UpdateChild();
target.Measure(new Size(100, 100));
target.Arrange(new Rect(0, 0, 100, 100));
Assert.Equal(new Size(100, 100), target.DesiredSize);
}
public void Content_Can_Be_Offset()
{
Border content;
var target = new ScrollContentPresenter
{
Content = content = new Border
{
Width = 150,
Height = 150,
},
Offset = new Vector(25, 25),
};
target.Measure(new Size(100, 100));
target.Arrange(new Rect(0, 0, 100, 100));
Assert.Equal(new Rect(-25, -25, 150, 150), content.Bounds);
}
public void Arrange_Should_Not_Offset_IScrollable_Bounds()
{
var scrollable = new TestScrollable
{
Extent = new Size(100, 100),
Offset = new Vector(50, 50),
Viewport = new Size(25, 25),
};
var target = new ScrollContentPresenter
{
Content = scrollable,
};
target.Measure(new Size(100, 100));
target.Arrange(new Rect(0, 0, 100, 100));
Assert.Equal(new Rect(0, 0, 100, 100), scrollable.Bounds);
}
public void Arrange_Should_Set_Viewport_And_Extent_In_That_Order()
{
var target = new ScrollContentPresenter
{
Content = new Border {
Width = 40, Height = 50
}
};
var set = new List <string>();
target.Measure(new Size(100, 100));
target.GetObservable(ScrollViewer.ViewportProperty).Skip(1).Subscribe(_ => set.Add("Viewport"));
target.GetObservable(ScrollViewer.ExtentProperty).Skip(1).Subscribe(_ => set.Add("Extent"));
target.Arrange(new Rect(0, 0, 100, 100));
Assert.Equal(new[] { "Viewport", "Extent" }, set);
}
public void BringDescendantIntoView_Should_Update_Offset()
{
var target = new ScrollContentPresenter
{
Width = 100,
Height = 100,
Content = new Border
{
Width = 200,
Height = 200,
}
};
target.UpdateChild();
target.Measure(Size.Infinity);
target.Arrange(new Rect(0, 0, 100, 100));
target.BringDescendantIntoView(target.Child, new Rect(200, 200, 0, 0));
Assert.Equal(new Vector(100, 100), target.Offset);
}
public void ScrollOffsetsAreCached2()
{
var child = ContentControlWithChild(200, 200);
ScrollContentPresenter presenter = new ScrollContentPresenter {
Content = child,
Width = 100,
Height = 100,
CanHorizontallyScroll = true,
CanVerticallyScroll = true,
ScrollOwner = new ScrollViewer()
};
presenter.Measure(new Size(100, 100));
presenter.SetHorizontalOffset(50);
presenter.SetVerticalOffset(50);
presenter.Arrange(new Rect(0, 0, 100, 100));
Assert.AreEqual(50, presenter.HorizontalOffset, "#3");
Assert.AreEqual(50, presenter.VerticalOffset, "#4");
}
public void Measure_LessSize_SmallerArrange()
{
var child = ContentControlWithChild();
var presenter = new ScrollContentPresenter {
ScrollOwner = new ScrollViewer(),
Content = child
};
presenter.Measure(new Size(25, 25));
presenter.Arrange(new Rect(0, 0, 15, 15));
Assert.IsTrue(child.IsArranged, "#b");
Assert.AreEqual(new Size(25, 25), child.ArrangeOverrideArg, "#f");
Assert.AreEqual(25, presenter.ActualHeight, "#1");
Assert.AreEqual(25, presenter.ActualWidth, "#2");
Assert.AreEqual(25, presenter.ExtentHeight, "#3");
Assert.AreEqual(25, presenter.ExtentWidth, "#4");
Assert.AreEqual(25, presenter.ViewportHeight, "#5");
Assert.AreEqual(25, presenter.ViewportWidth, "#6");
Assert.AreEqual(new Size(25, 25), presenter.RenderSize, "#7");
}
public void ArrangeDoesNotUpdateOwner()
{
ScrollViewer owner = new ScrollViewer();
var presenter = new ScrollContentPresenter {
CanHorizontallyScroll = true,
CanVerticallyScroll = true,
ScrollOwner = owner,
Content = ContentControlWithChild()
};
Assert.AreEqual(0, owner.ExtentHeight, "#1");
Assert.AreEqual(0, owner.ExtentWidth, "#2");
Assert.AreEqual(0, owner.ViewportHeight, "#3");
Assert.AreEqual(0, owner.ViewportHeight, "#4");
presenter.Measure(new Size(25, 25));
presenter.Arrange(new Rect(0, 0, 50, 50));
Assert.AreEqual(0, owner.ExtentHeight, "#5");
Assert.AreEqual(0, owner.ExtentWidth, "#6");
Assert.AreEqual(0, owner.ViewportHeight, "#7");
Assert.AreEqual(0, owner.ViewportHeight, "#8");
}
