public void Should_Remove_Old_Child_From_LogicalChildren_On_ContentChanged_OutsideTemplate()
{
var target = new ContentPresenter
{
ContentTemplate =
new FuncDataTemplate <string>(t => new ContentControl()
{
Content = t
}, false)
};
target.Content = "foo";
target.UpdateChild();
var foo = target.Child as ContentControl;
Assert.NotNull(foo);
var logicalChildren = target.GetLogicalChildren();
Assert.Equal(1, logicalChildren.Count());
target.Content = "bar";
target.UpdateChild();
Assert.Equal(null, foo.Parent);
logicalChildren = target.GetLogicalChildren();
Assert.Equal(1, logicalChildren.Count());
Assert.NotEqual(foo, logicalChildren.First());
}
public void Assigning_Control_To_Content_After_NonControl_Should_Clear_DataContext()
{
var target = new ContentPresenter();
target.Content = "foo";
target.UpdateChild();
Assert.True(target.IsSet(Control.DataContextProperty));
target.Content = new Border();
target.UpdateChild();
Assert.False(target.IsSet(Control.DataContextProperty));
}
public void Should_Reset_InheritanceParent_When_Child_Removed()
{
var logicalParent = new Canvas();
var child = new TextBlock();
var target = new ContentPresenter();
((ISetLogicalParent)child).SetParent(logicalParent);
target.Content = child;
target.UpdateChild();
target.Content = null;
target.UpdateChild();
// InheritanceParent is exposed via StylingParent.
Assert.Same(logicalParent, ((IStyledElement)child).StylingParent);
}
public void Content_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 ContentPresenter
{
HorizontalContentAlignment = h,
VerticalContentAlignment = v,
Padding = new Thickness(10),
Content = content = new Border
{
MinWidth = 16,
MinHeight = 16,
},
};
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 Replacing_Template_Releases_Events()
{
var p1 = new ContentPresenter {
Name = "Content_1_Presenter"
};
var p2 = new ContentPresenter {
Name = "Content_2_Presenter"
};
var target = new TestControl
{
Template = new FuncControlTemplate(_ => new Panel
{
Children =
{
p1,
p2
}
})
};
target.ApplyTemplate();
Control tc;
p1.Content = tc = new Control();
p1.UpdateChild();
Assert.Contains(tc, target.GetLogicalChildren());
p2.Content = tc = new Control();
p2.UpdateChild();
Assert.Contains(tc, target.GetLogicalChildren());
target.Template = null;
p1.Content = tc = new Control();
p1.UpdateChild();
Assert.DoesNotContain(tc, target.GetLogicalChildren());
p2.Content = tc = new Control();
p2.UpdateChild();
Assert.DoesNotContain(tc, target.GetLogicalChildren());
}
public void Should_Raise_DetachedFromLogicalTree_On_Content_Changed_Standalone()
{
var target = new ContentPresenter
{
ContentTemplate =
new FuncDataTemplate <string>((t, _) => new ContentControl()
{
Content = t
}, false)
};
var parentMock = new Mock <Control>();
parentMock.As <IContentPresenterHost>();
parentMock.As <IRenderRoot>();
parentMock.As <ILogicalRoot>();
(target as ISetLogicalParent).SetParent(parentMock.Object);
target.Content = "foo";
target.UpdateChild();
var foo = target.Child as ContentControl;
bool foodetached = false;
Assert.NotNull(foo);
Assert.Equal("foo", foo.Content);
foo.DetachedFromLogicalTree += delegate { foodetached = true; };
target.Content = "bar";
target.UpdateChild();
var bar = target.Child as ContentControl;
Assert.NotNull(bar);
Assert.True(bar != foo);
Assert.False((foo as IControl).IsAttachedToLogicalTree);
Assert.True(foodetached);
}
public void DataTemplate_Created_Control_Should_Be_NameScope()
{
var target = new ContentPresenter();
target.Content = "Foo";
Assert.Null(target.Child);
target.UpdateChild();
Assert.IsType <TextBlock>(target.Child);
Assert.NotNull(NameScope.GetNameScope((Control)target.Child));
}
public void Setting_Content_To_Control_Should_Set_Child()
{
var target = new ContentPresenter();
var child = new Border();
target.Content = child;
Assert.Null(target.Child);
target.UpdateChild();
Assert.Equal(child, target.Child);
}
public void Assigning_NonControl_To_Content_Should_Set_DataContext_On_UpdateChild()
{
var target = new ContentPresenter
{
Content = "foo",
};
target.UpdateChild();
Assert.Equal("foo", target.DataContext);
}
public void Setting_Content_To_String_Should_Create_TextBlock()
{
var target = new ContentPresenter();
target.Content = "Foo";
Assert.Null(target.Child);
target.UpdateChild();
Assert.IsType <TextBlock>(target.Child);
Assert.Equal("Foo", ((TextBlock)target.Child).Text);
}
public void Control_Content_Should_Not_Be_NameScope()
{
var target = new ContentPresenter();
target.Content = new TextBlock();
Assert.Null(target.Child);
target.UpdateChild();
Assert.IsType <TextBlock>(target.Child);
Assert.Null(NameScope.GetNameScope((Control)target.Child));
}
public void Clearing_String_Content_Should_Remove_Child_Immediately()
{
var target = new ContentPresenter();
target.Content = "Foo";
target.UpdateChild();
Assert.IsType <TextBlock>(target.Child);
target.Content = null;
Assert.Null(target.Child);
}
public void Should_Set_Childs_Parent_To_Itself_Outside_Template()
{
var content = new Border();
var target = new ContentPresenter {
Content = content
};
target.UpdateChild();
Assert.Same(target, content.Parent);
}
public void Should_Not_Create_Child_When_Content_And_Template_Are_Null()
{
var target = new ContentPresenter
{
ContentTemplate = null,
Content = null
};
target.UpdateChild();
Assert.Null(target.Child);
}
public void Clearing_Control_Content_Should_Remove_Child_Immediately()
{
var target = new ContentPresenter();
var child = new Border();
target.Content = child;
target.UpdateChild();
Assert.Equal(child, target.Child);
target.Content = null;
Assert.Null(target.Child);
}
public void Tries_To_Recycle_DataTemplate()
{
var target = new ContentPresenter
{
DataTemplates = new DataTemplates
{
new FuncDataTemplate <string>(_ => new Border(), true),
},
Content = "foo",
};
target.UpdateChild();
var control = target.Child;
Assert.IsType <Border>(control);
target.Content = "bar";
target.UpdateChild();
Assert.Same(control, target.Child);
}
public void Should_Add_Child_To_Own_LogicalChildren_Standalone()
{
var content = new Border();
var target = new ContentPresenter {
Content = content
};
target.UpdateChild();
var logicalChildren = target.GetLogicalChildren();
Assert.Single(logicalChildren);
Assert.Equal(content, logicalChildren.First());
}
public void Should_Add_Child_To_Own_LogicalChildren_Outside_Template()
{
var content = new Border();
var target = new ContentPresenter {
Content = content
};
target.UpdateChild();
var logicalChildren = target.GetLogicalChildren();
Assert.Equal(1, logicalChildren.Count());
Assert.Equal(content, logicalChildren.First());
}
public void Setting_Content_To_Control_Should_Not_Set_Child_Unless_UpdateChild_Called()
{
var target = new ContentPresenter();
var child = new Border();
target.Content = child;
Assert.Null(target.Child);
target.ApplyTemplate();
Assert.Null(target.Child);
target.UpdateChild();
Assert.Equal(child, target.Child);
}
public void Should_Create_Child_When_Content_Is_Null_And_Expected_NullableValueType_With_FuncDataTemplate()
{
var target = new ContentPresenter
{
ContentTemplate = new FuncDataTemplate <int?>(_ => true, (_, __) => new TextBlock
{
Text = "Hello World"
}),
Content = null
};
target.UpdateChild();
Assert.NotNull(target.Child);
}
public void Should_Create_Child_Even_With_Null_Content_When_ContentTemplate_Is_Set()
{
var target = new ContentPresenter
{
ContentTemplate = new FuncDataTemplate <object>(_ => true, (_, __) => new TextBlock
{
Text = "Hello World"
}),
Content = null
};
target.UpdateChild();
var textBlock = Assert.IsType <TextBlock>(target.Child);
Assert.Equal("Hello World", textBlock.Text);
}
public void Content_Can_Be_Stretched()
{
Border content;
var target = new ContentPresenter
{
Content = content = new Border
{
MinWidth = 16,
MinHeight = 16,
},
};
target.UpdateChild();
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 Should_Not_Create_Child_Even_With_Null_Content_And_DataTemplates_InsteadOf_ContentTemplate()
{
var target = new ContentPresenter
{
DataTemplates =
{
new FuncDataTemplate <object>(_ => true, (_, __) => new TextBlock
{
Text = "Hello World"
})
},
Content = null
};
target.UpdateChild();
Assert.Null(target.Child);
}
public void Content_Can_Be_Right_Aligned()
{
Border content;
var target = new ContentPresenter
{
Content = content = new Border
{
MinWidth = 16,
MinHeight = 16,
HorizontalAlignment = HorizontalAlignment.Right
},
};
target.UpdateChild();
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 Content_Can_Be_Bottom_Aligned()
{
Border content;
var target = new ContentPresenter
{
Content = content = new Border
{
MinWidth = 16,
MinHeight = 16,
VerticalAlignment = VerticalAlignment.Bottom,
},
};
target.UpdateChild();
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 Adding_To_Logical_Tree_Should_Reevaluate_DataTemplates()
{
var target = new ContentPresenter
{
Content = "Foo",
};
target.UpdateChild();
Assert.IsType <TextBlock>(target.Child);
var root = new TestRoot
{
DataTemplates = new DataTemplates
{
new FuncDataTemplate <string>(x => new Decorator()),
},
};
root.Child = target;
target.ApplyTemplate();
Assert.IsType <Decorator>(target.Child);
}
public void Child_Arrange_With_Zero_Height_When_Padding_Height_Greater_Than_Child_Height()
{
Border content;
var target = new ContentPresenter
{
Padding = new Thickness(32),
MaxHeight = 32,
MaxWidth = 32,
HorizontalContentAlignment = HorizontalAlignment.Center,
VerticalContentAlignment = VerticalAlignment.Center,
Content = content = new Border
{
Height = 0,
Width = 0,
},
};
target.UpdateChild();
target.Arrange(new Rect(0, 0, 100, 100));
Assert.Equal(new Rect(32, 32, 0, 0), content.Bounds);
}
public void Should_Correctly_Align_Child_With_Fixed_Size()
{
Border content;
var target = new ContentPresenter
{
HorizontalContentAlignment = HorizontalAlignment.Stretch,
VerticalContentAlignment = VerticalAlignment.Stretch,
Content = content = new Border
{
HorizontalAlignment = HorizontalAlignment.Left,
VerticalAlignment = VerticalAlignment.Bottom,
Width = 16,
Height = 16,
},
};
target.UpdateChild();
target.Measure(new Size(100, 100));
target.Arrange(new Rect(0, 0, 100, 100));
// Check correct result for Issue #1447.
Assert.Equal(new Rect(0, 84, 16, 16), content.Bounds);
}
public void Should_Raise_DetachedFromLogicalTree_On_Detached_OutsideTemplate()
{
var target = new ContentPresenter
{
ContentTemplate =
new FuncDataTemplate <string>(t => new ContentControl()
{
Content = t
}, false)
};
var parentMock = new Mock <Control>();
parentMock.As <IContentPresenterHost>();
parentMock.As <IStyleRoot>();
(target as ISetLogicalParent).SetParent(parentMock.Object);
target.Content = "foo";
target.UpdateChild();
var foo = target.Child as ContentControl;
bool foodetached = false;
Assert.NotNull(foo);
Assert.Equal("foo", foo.Content);
foo.DetachedFromLogicalTree += delegate { foodetached = true; };
(target as ISetLogicalParent).SetParent(null);
Assert.False((foo as IControl).IsAttachedToLogicalTree);
Assert.True(foodetached);
}
