protected override void OnInitialized()
{
base.OnInitialized();
if (this.ExtendedItem.Parent != null)
{
if (this.ExtendedItem.Parent.ComponentType == typeof(Canvas))
{
FrameworkElement extendedControl = (FrameworkElement)this.ExtendedItem.Component;
AdornerPanel adornerPanel = new AdornerPanel();
// If the Element is rotated/skewed in the grid, then margin handles do not appear
if (extendedControl.LayoutTransform.Value == Matrix.Identity && extendedControl.RenderTransform.Value == Matrix.Identity)
{
_canvas = this.ExtendedItem.Parent.View as Canvas;
_handles = new[]
{
_leftHandle = new CanvasPositionHandle(ExtendedItem, adornerPanel, HandleOrientation.Left),
_topHandle = new CanvasPositionHandle(ExtendedItem, adornerPanel, HandleOrientation.Top),
_rightHandle = new CanvasPositionHandle(ExtendedItem, adornerPanel, HandleOrientation.Right),
_bottomHandle = new CanvasPositionHandle(ExtendedItem, adornerPanel, HandleOrientation.Bottom),
};
}
if (adornerPanel != null)
{
this.Adorners.Add(adornerPanel);
}
}
}
}
protected override void OnInitialized()
{
base.OnInitialized();
if (this.ExtendedItem.Parent != null)
{
if (this.ExtendedItem.Parent.ComponentType == typeof(Grid))
{
FrameworkElement extendedControl = (FrameworkElement)this.ExtendedItem.Component;
AdornerPanel adornerPanel = new AdornerPanel();
// If the Element is rotated/skewed in the grid, then margin handles do not appear
if (extendedControl.LayoutTransform.Value == Matrix.Identity && extendedControl.RenderTransform.Value == Matrix.Identity)
{
_grid = this.ExtendedItem.Parent.View as Grid;
_handles = new[]
{
_leftHandle = new MarginHandle(ExtendedItem, adornerPanel, HandleOrientation.Left),
_topHandle = new MarginHandle(ExtendedItem, adornerPanel, HandleOrientation.Top),
_rightHandle = new MarginHandle(ExtendedItem, adornerPanel, HandleOrientation.Right),
_bottomHandle = new MarginHandle(ExtendedItem, adornerPanel, HandleOrientation.Bottom),
};
foreach (var handle in _handles)
{
handle.MouseLeftButtonDown += OnMouseDown;
handle.Stub.PreviewMouseLeftButtonDown += OnMouseDown;
}
}
if (adornerPanel != null)
{
this.Adorners.Add(adornerPanel);
}
}
}
}
public void HandleLength()
{
Intialize();
var handle = new MarginHandle(_button, new AdornerPanel(), HandleOrientation.Left);
Assert.AreEqual(21, handle.HandleLength);
Assert.IsTrue(handle.Visibility == Visibility.Visible, "Handle is not visible");
Assert.IsTrue(handle.Stub.Visibility == Visibility.Hidden, "Stub is Visible");
}
public void ChangeVerticalAlignment()
{
var topHandle = new MarginHandle(_button, new AdornerPanel(), HandleOrientation.Top);
var bottomHandle = new MarginHandle(_button, new AdornerPanel(), HandleOrientation.Bottom);
_button.Properties[FrameworkElement.VerticalAlignmentProperty].SetValue(VerticalAlignment.Bottom);
Assert.IsFalse(topHandle.Visibility == Visibility.Visible, "Top Handle is visible");
Assert.IsFalse(topHandle.Stub.Visibility == Visibility.Hidden, "Top Stub is not Visible");
Assert.IsTrue(bottomHandle.Visibility == Visibility.Visible, "Bottom Handle is not visible");
Assert.IsTrue(bottomHandle.Stub.Visibility == Visibility.Hidden, "Bottom Stub is Visible");
}
public void ChangeHorizontalAlignment()
{
var leftHandle = new MarginHandle(_button, new AdornerPanel(), HandleOrientation.Left);
var rightHandle = new MarginHandle(_button, new AdornerPanel(), HandleOrientation.Right);
_button.Properties[FrameworkElement.HorizontalAlignmentProperty].SetValue(HorizontalAlignment.Right);
Assert.IsFalse(leftHandle.Visibility == Visibility.Visible, "Left Handle is visible");
Assert.IsFalse(leftHandle.Stub.Visibility == Visibility.Hidden, "Left Stub is not Visible");
Assert.IsTrue(rightHandle.Visibility == Visibility.Visible, "Right Handle is not visible");
Assert.IsTrue(rightHandle.Stub.Visibility == Visibility.Hidden, "Right Stub is Visible");
}
public void ResizeTest(double width, double height)
{
var handle = new MarginHandle(_button, new AdornerPanel(), HandleOrientation.Left);
var grid = _button.Parent.View;
grid.Measure(grid.DesiredSize);
grid.Arrange(new Rect(grid.DesiredSize));
grid.UpdateLayout();
PlacementTests.Resize(new Rect(20, 20, width, height), _button);
Assert.AreEqual(20, handle.HandleLength);
Assert.IsTrue(handle.Visibility == Visibility.Visible, "Handle is not visible");
Assert.IsTrue(handle.Stub.Visibility == Visibility.Hidden, "Stub is Visible");
}
public void MoveTest()
{
Intialize();
var handle = new MarginHandle(_button, new AdornerPanel(), HandleOrientation.Left);
var grid = _button.Parent.View;
grid.Measure(grid.DesiredSize);
grid.Arrange(new Rect(grid.DesiredSize));
grid.UpdateLayout();
PlacementTests.Move(new Vector(20, 20), _button);
Assert.AreEqual(41, handle.HandleLength);
Assert.IsTrue(handle.Visibility == Visibility.Visible, "Handle is not visible");
Assert.IsTrue(handle.Stub.Visibility == Visibility.Hidden, "Stub is Visible");
}
private void OnMouseDown(object sender, MouseButtonEventArgs e)
{
e.Handled = true;
var row = (int)this.ExtendedItem.Properties.GetAttachedProperty(Grid.RowProperty).ValueOnInstance;
var rowSpan = (int)this.ExtendedItem.Properties.GetAttachedProperty(Grid.RowSpanProperty).ValueOnInstance;
var column = (int)this.ExtendedItem.Properties.GetAttachedProperty(Grid.ColumnProperty).ValueOnInstance;
var columnSpan = (int)this.ExtendedItem.Properties.GetAttachedProperty(Grid.ColumnSpanProperty).ValueOnInstance;
var margin = (Thickness)this.ExtendedItem.Properties[FrameworkElement.MarginProperty].ValueOnInstance;
var point = this.ExtendedItem.View.TranslatePoint(new Point(), _grid);
var position = new Rect(point, this.ExtendedItem.View.RenderSize);
MarginHandle handle = null;
if (sender is MarginHandle)
{
handle = sender as MarginHandle;
}
if (sender is MarginStub)
{
handle = ((MarginStub)sender).Handle;
}
if (handle != null)
{
switch (handle.Orientation)
{
case HandleOrientation.Left:
if (_rightHandle.Visibility == Visibility.Visible)
{
if (_leftHandle.Visibility == Visibility.Visible)
{
margin.Left = 0;
this.ExtendedItem.Properties[FrameworkElement.WidthProperty].SetValue(position.Width);
this.ExtendedItem.Properties[FrameworkElement.HorizontalAlignmentProperty].SetValue(HorizontalAlignment.Right);
}
else
{
var leftMargin = position.Left - GetColumnOffset(column);
margin.Left = leftMargin;
this.ExtendedItem.Properties[FrameworkElement.HorizontalAlignmentProperty].Reset();
}
}
else
{
if (_leftHandle.Visibility == Visibility.Visible)
{
margin.Left = 0;
var rightMargin = GetColumnOffset(column + columnSpan) - position.Right;
margin.Right = rightMargin;
this.ExtendedItem.Properties[FrameworkElement.WidthProperty].SetValue(position.Width);
this.ExtendedItem.Properties[FrameworkElement.HorizontalAlignmentProperty].SetValue(HorizontalAlignment.Right);
}
else
{
var leftMargin = position.Left - GetColumnOffset(column);
margin.Left = leftMargin;
this.ExtendedItem.Properties[FrameworkElement.HorizontalAlignmentProperty].SetValue(HorizontalAlignment.Left);
}
}
break;
case HandleOrientation.Top:
if (_bottomHandle.Visibility == Visibility.Visible)
{
if (_topHandle.Visibility == Visibility.Visible)
{
margin.Top = 0;
this.ExtendedItem.Properties[FrameworkElement.HeightProperty].SetValue(position.Height);
this.ExtendedItem.Properties[FrameworkElement.VerticalAlignmentProperty].SetValue(VerticalAlignment.Bottom);
}
else
{
var topMargin = position.Top - GetRowOffset(row);
margin.Top = topMargin;
this.ExtendedItem.Properties[FrameworkElement.VerticalAlignmentProperty].Reset();
}
}
else
{
if (_topHandle.Visibility == Visibility.Visible)
{
margin.Top = 0;
var bottomMargin = GetRowOffset(row + rowSpan) - position.Bottom;
margin.Bottom = bottomMargin;
this.ExtendedItem.Properties[FrameworkElement.HeightProperty].SetValue(position.Height);
this.ExtendedItem.Properties[FrameworkElement.VerticalAlignmentProperty].SetValue(VerticalAlignment.Bottom);
}
else
{
var topMargin = position.Top - GetRowOffset(row);
margin.Top = topMargin;
this.ExtendedItem.Properties[FrameworkElement.VerticalAlignmentProperty].SetValue(VerticalAlignment.Top);
}
}
break;
case HandleOrientation.Right:
if (_leftHandle.Visibility == Visibility.Visible)
{
if (_rightHandle.Visibility == Visibility.Visible)
{
margin.Right = 0;
this.ExtendedItem.Properties[FrameworkElement.WidthProperty].SetValue(position.Width);
this.ExtendedItem.Properties[FrameworkElement.HorizontalAlignmentProperty].SetValue(HorizontalAlignment.Left);
}
else
{
var rightMargin = GetColumnOffset(column + columnSpan) - position.Right;
margin.Right = rightMargin;
this.ExtendedItem.Properties[FrameworkElement.HorizontalAlignmentProperty].Reset();
}
}
else
{
if (_rightHandle.Visibility == Visibility.Visible)
{
margin.Right = 0;
var leftMargin = position.Left - GetColumnOffset(column);
margin.Left = leftMargin;
this.ExtendedItem.Properties[FrameworkElement.WidthProperty].SetValue(position.Width);
this.ExtendedItem.Properties[FrameworkElement.HorizontalAlignmentProperty].SetValue(HorizontalAlignment.Left);
}
else
{
var rightMargin = GetColumnOffset(column + columnSpan) - position.Right;
margin.Right = rightMargin;
this.ExtendedItem.Properties[FrameworkElement.HorizontalAlignmentProperty].SetValue(HorizontalAlignment.Right);
}
}
break;
case HandleOrientation.Bottom:
if (_topHandle.Visibility == Visibility.Visible)
{
if (_bottomHandle.Visibility == Visibility.Visible)
{
margin.Bottom = 0;
this.ExtendedItem.Properties[FrameworkElement.HeightProperty].SetValue(position.Height);
this.ExtendedItem.Properties[FrameworkElement.VerticalAlignmentProperty].SetValue(VerticalAlignment.Top);
}
else
{
var bottomMargin = GetRowOffset(row + rowSpan) - position.Bottom;
margin.Bottom = bottomMargin;
this.ExtendedItem.Properties[FrameworkElement.VerticalAlignmentProperty].Reset();
}
}
else
{
if (_bottomHandle.Visibility == Visibility.Visible)
{
margin.Bottom = 0;
var topMargin = position.Top - GetRowOffset(row);
margin.Top = topMargin;
this.ExtendedItem.Properties[FrameworkElement.HeightProperty].SetValue(position.Height);
this.ExtendedItem.Properties[FrameworkElement.VerticalAlignmentProperty].SetValue(VerticalAlignment.Top);
}
else
{
var bottomMargin = GetRowOffset(row + rowSpan) - position.Bottom;
margin.Bottom = bottomMargin;
this.ExtendedItem.Properties[FrameworkElement.VerticalAlignmentProperty].SetValue(VerticalAlignment.Bottom);
}
}
break;
}
}
this.ExtendedItem.Properties[FrameworkElement.MarginProperty].SetValue(margin);
}