/// <summary>
/// Gets a read-only <see cref="T:Avalonia.Controls.TextBlock" /> element that is bound to the column's <see cref="P:Avalonia.Controls.DataGridBoundColumn.Binding" /> property value.
/// </summary>
/// <param name="cell">The cell that will contain the generated element.</param>
/// <param name="dataItem">The data item represented by the row that contains the intended cell.</param>
/// <returns>A new, read-only <see cref="T:Avalonia.Controls.TextBlock" /> element that is bound to the column's <see cref="P:Avalonia.Controls.DataGridBoundColumn.Binding" /> property value.</returns>
protected override IControl GenerateElement(DataGridCell cell, object dataItem)
{
TextBlock textBlockElement = new TextBlock
{
Margin = new Thickness(4),
VerticalAlignment = VerticalAlignment.Center
};
if (IsSet(FontFamilyProperty))
{
textBlockElement.FontFamily = FontFamily;
}
if (_fontSize.HasValue)
{
textBlockElement.FontSize = _fontSize.Value;
}
if (_fontStyle.HasValue)
{
textBlockElement.FontStyle = _fontStyle.Value;
}
if (_fontWeight.HasValue)
{
textBlockElement.FontWeight = _fontWeight.Value;
}
if (_foreground != null)
{
textBlockElement.Foreground = _foreground;
}
if (Binding != null)
{
textBlockElement.Bind(TextBlock.TextProperty, Binding);
}
return(textBlockElement);
}
public void Should_Bind_To_Element_Path()
{
TextBlock target;
var root = new TestRoot
{
Child = new StackPanel
{
Children = new Controls.Controls
{
new TextBlock
{
Name = "source",
Text = "foo",
},
(target = new TextBlock
{
Name = "target",
})
}
}
};
var binding = new Binding
{
ElementName = "source",
Path = "Text",
};
target.Bind(TextBox.TextProperty, binding);
Assert.Equal("foo", target.Text);
}
public void Source_Should_Be_Used()
{
var source = new Source { Foo = "foo" };
var binding = new Binding { Source = source, Path = "Foo" };
var target = new TextBlock();
target.Bind(TextBlock.TextProperty, binding);
Assert.Equal(target.Text, "foo");
}
public void OneTime_Binding_Should_Be_Set_Up()
{
var source = new Source { Foo = "foo" };
var target = new TextBlock { DataContext = source };
var binding = new Binding
{
Path = "Foo",
Mode = BindingMode.OneTime,
};
target.Bind(TextBox.TextProperty, binding);
Assert.Equal("foo", target.Text);
source.Foo = "bar";
Assert.Equal("foo", target.Text);
target.Text = "baz";
Assert.Equal("bar", source.Foo);
}
public void Should_Return_FallbackValue_When_Converter_Returns_UnsetValue()
{
var target = new TextBlock();
var source = new { A = 1, B = 2, C = 3 };
var binding = new MultiBinding
{
Converter = new UnsetValueConverter(),
Bindings = new[]
{
new Binding { Path = "A" },
new Binding { Path = "B" },
new Binding { Path = "C" },
},
FallbackValue = "fallback",
};
target.Bind(TextBlock.TextProperty, binding);
Assert.Equal("fallback", target.Text);
}
public void Should_Return_FallbackValue_When_Path_Not_Resolved()
{
var target = new TextBlock();
var source = new Source();
var binding = new Binding
{
Source = source,
Path = "BadPath",
FallbackValue = "foofallback",
};
target.Bind(TextBlock.TextProperty, binding);
Assert.Equal("foofallback", target.Text);
}
