private void InitializeComponent()
{
Func<object, IEnumerable<Control>> pt = PropertyTemplate;
Content = new ScrollViewer
{
Content = new Grid
{
ColumnDefinitions = new ColumnDefinitions
{
new ColumnDefinition(GridLength.Auto),
new ColumnDefinition(GridLength.Auto),
new ColumnDefinition(GridLength.Auto),
},
Styles = new Styles
{
new Style(x => x.Is<Control>())
{
Setters = new[]
{
new Setter(MarginProperty, new Thickness(2)),
}
},
},
[GridRepeater.TemplateProperty] = pt,
[!GridRepeater.ItemsProperty] = this.WhenAnyValue(x => x.ViewModel.Properties),
}
};
}
public void Offset_Should_Be_Coerced_To_Viewport()
{
var target = new ScrollViewer();
target.SetValue(ScrollViewer.ExtentProperty, new Size(20, 20));
target.SetValue(ScrollViewer.ViewportProperty, new Size(10, 10));
target.Offset = new Vector(12, 12);
Assert.Equal(new Vector(10, 10), target.Offset);
}
public void Content_Is_Created()
{
var target = new ScrollViewer
{
Template = new FuncControlTemplate<ScrollViewer>(CreateTemplate),
Content = "Foo",
};
target.ApplyTemplate();
Assert.IsType<TextBlock>(target.Presenter.Child);
}
public void Content_Is_Created()
{
var target = new ScrollViewer
{
Template = ControlTemplate.Create<ScrollViewer>(this.CreateTemplate),
Content = "Foo",
};
target.ApplyTemplate();
var presenter = target.GetTemplateChild<ScrollContentPresenter>("contentPresenter");
Assert.IsType<TextBlock>(presenter.Child);
}
/// <summary>
/// The default template for the <see cref="ScrollViewer"/> control.
/// </summary>
/// <param name="control">The control being styled.</param>
/// <returns>The root of the instantiated template.</returns>
public static Control Template(ScrollViewer control)
{
var result = new Grid
{
ColumnDefinitions = new ColumnDefinitions
{
new ColumnDefinition(1, GridUnitType.Star),
new ColumnDefinition(GridLength.Auto),
},
RowDefinitions = new RowDefinitions
{
new RowDefinition(1, GridUnitType.Star),
new RowDefinition(GridLength.Auto),
},
Children = new Controls
{
new ScrollContentPresenter
{
Name = "contentPresenter",
[~ScrollContentPresenter.ContentProperty] = control[~ScrollViewer.ContentProperty],
[~~ScrollContentPresenter.ExtentProperty] = control[~~ScrollViewer.ExtentProperty],
[~~ScrollContentPresenter.OffsetProperty] = control[~~ScrollViewer.OffsetProperty],
[~~ScrollContentPresenter.ViewportProperty] = control[~~ScrollViewer.ViewportProperty],
[~ScrollContentPresenter.CanScrollHorizontallyProperty] = control[~ScrollViewer.CanScrollHorizontallyProperty],
},
new ScrollBar
{
Name = "horizontalScrollBar",
Orientation = Orientation.Horizontal,
[~ScrollBar.MaximumProperty] = control[~ScrollViewer.HorizontalScrollBarMaximumProperty],
[~~ScrollBar.ValueProperty] = control[~~ScrollViewer.HorizontalScrollBarValueProperty],
[~ScrollBar.ViewportSizeProperty] = control[~ScrollViewer.HorizontalScrollBarViewportSizeProperty],
[~ScrollBar.VisibilityProperty] = control[~ScrollViewer.HorizontalScrollBarVisibilityProperty],
[Grid.RowProperty] = 1,
},
new ScrollBar
{
Name = "verticalScrollBar",
Orientation = Orientation.Vertical,
[~ScrollBar.MaximumProperty] = control[~ScrollViewer.VerticalScrollBarMaximumProperty],
[~~ScrollBar.ValueProperty] = control[~~ScrollViewer.VerticalScrollBarValueProperty],
[~ScrollBar.ViewportSizeProperty] = control[~ScrollViewer.VerticalScrollBarViewportSizeProperty],
[~ScrollBar.VisibilityProperty] = control[~ScrollViewer.VerticalScrollBarVisibilityProperty],
[Grid.ColumnProperty] = 1,
},
},
};
return result;
}
private Control CreateTemplate(ScrollViewer control)
{
return new Grid
{
ColumnDefinitions = new ColumnDefinitions
{
new ColumnDefinition(1, GridUnitType.Star),
new ColumnDefinition(GridLength.Auto),
},
RowDefinitions = new RowDefinitions
{
new RowDefinition(1, GridUnitType.Star),
new RowDefinition(GridLength.Auto),
},
Children = new Controls
{
new ScrollContentPresenter
{
Name = "PART_ContentPresenter",
[~ContentPresenter.ContentProperty] = control[~ContentControl.ContentProperty],
[~~ScrollContentPresenter.ExtentProperty] = control[~~ScrollViewer.ExtentProperty],
[~~ScrollContentPresenter.OffsetProperty] = control[~~ScrollViewer.OffsetProperty],
[~~ScrollContentPresenter.ViewportProperty] = control[~~ScrollViewer.ViewportProperty],
[~ScrollContentPresenter.CanScrollHorizontallyProperty] = control[~ScrollViewer.CanScrollHorizontallyProperty],
},
new ScrollBar
{
Name = "horizontalScrollBar",
Orientation = Orientation.Horizontal,
[~RangeBase.MaximumProperty] = control[~ScrollViewer.HorizontalScrollBarMaximumProperty],
[~~RangeBase.ValueProperty] = control[~~ScrollViewer.HorizontalScrollBarValueProperty],
[~ScrollBar.ViewportSizeProperty] = control[~ScrollViewer.HorizontalScrollBarViewportSizeProperty],
[~ScrollBar.VisibilityProperty] = control[~ScrollViewer.HorizontalScrollBarVisibilityProperty],
[Grid.RowProperty] = 1,
},
new ScrollBar
{
Name = "verticalScrollBar",
Orientation = Orientation.Vertical,
[~RangeBase.MaximumProperty] = control[~ScrollViewer.VerticalScrollBarMaximumProperty],
[~~RangeBase.ValueProperty] = control[~~ScrollViewer.VerticalScrollBarValueProperty],
[~ScrollBar.ViewportSizeProperty] = control[~ScrollViewer.VerticalScrollBarViewportSizeProperty],
[~ScrollBar.VisibilityProperty] = control[~ScrollViewer.VerticalScrollBarVisibilityProperty],
[Grid.ColumnProperty] = 1,
},
},
};
}
public void Test_ScrollViewer_With_TextBlock()
{
using (var context = PerspexLocator.EnterScope())
{
RegisterServices();
ScrollViewer scrollViewer;
TextBlock textBlock;
var window = new Window()
{
Width = 800,
Height = 600,
SizeToContent = SizeToContent.WidthAndHeight,
Content = scrollViewer = new ScrollViewer
{
Width = 200,
Height = 200,
CanScrollHorizontally = true,
HorizontalAlignment = HorizontalAlignment.Center,
VerticalAlignment = VerticalAlignment.Center,
Content = textBlock = new TextBlock
{
Width = 400,
Height = 400,
Text = "Hello World!",
},
}
};
window.LayoutManager.ExecuteLayoutPass();
Assert.Equal(new Size(800, 600), window.Bounds.Size);
Assert.Equal(new Size(200, 200), scrollViewer.Bounds.Size);
Assert.Equal(new Point(300, 200), Position(scrollViewer));
Assert.Equal(new Size(400, 400), textBlock.Bounds.Size);
var scrollBars = scrollViewer.GetTemplateChildren().OfType<ScrollBar>().ToList();
var presenters = scrollViewer.GetTemplateChildren().OfType<ScrollContentPresenter>().ToList();
Assert.Equal(2, scrollBars.Count);
Assert.Equal(1, presenters.Count);
var presenter = presenters[0];
Assert.Equal(new Size(190, 190), presenter.Bounds.Size);
var horzScroll = scrollBars.Single(x => x.Orientation == Orientation.Horizontal);
var vertScroll = scrollBars.Single(x => x.Orientation == Orientation.Vertical);
Assert.True(horzScroll.IsVisible);
Assert.True(vertScroll.IsVisible);
Assert.Equal(new Size(190, 10), horzScroll.Bounds.Size);
Assert.Equal(new Size(10, 190), vertScroll.Bounds.Size);
Assert.Equal(new Point(0, 190), Position(horzScroll));
Assert.Equal(new Point(190, 0), Position(vertScroll));
}
}
