protected override void OnMouseLeftButtonDown(MouseButtonEventArgs args)
{
base.OnMouseLeftButtonDown(args);
if (ExtensionSurface.PlacementMode.Absolute == ExtensionSurface.GetMode(this.parent))
{
this.offset = Mouse.GetPosition(this);
Mouse.OverrideCursor = Cursors.Arrow;
CaptureMouse();
}
}
void OnBorderMouseMove(object sender, MouseEventArgs e)
{
if (!this.border.IsMouseCaptured)
{
if (this.border.IsMouseDirectlyOver && this.IsResizable && ExtensionSurface.GetMode(this) == ExtensionSurface.PlacementMode.Absolute)
{
Point position = e.GetPosition(this.border);
if (position.X <= BorderOffset && position.Y <= BorderOffset)
{
this.resizeOption = ResizeValues.TopLeft;
Mouse.OverrideCursor = Cursors.SizeNWSE;
}
else if (position.X >= this.border.ActualWidth - BorderOffset && position.Y <= BorderOffset)
{
this.resizeOption = ResizeValues.TopRight;
Mouse.OverrideCursor = Cursors.SizeNESW;
}
else if (position.X <= BorderOffset && position.Y >= this.border.ActualHeight - BorderOffset)
{
this.resizeOption = ResizeValues.BottomLeft;
Mouse.OverrideCursor = Cursors.SizeNESW;
}
else if (position.X >= this.border.ActualWidth - BorderOffset && position.Y >= this.border.ActualHeight - BorderOffset)
{
this.resizeOption = ResizeValues.BottomRight;
Mouse.OverrideCursor = Cursors.SizeNWSE;
}
else if (position.Y <= (BorderOffset / 2.0))
{
this.resizeOption = ResizeValues.Top;
Mouse.OverrideCursor = Cursors.SizeNS;
}
else if (position.Y >= this.border.ActualHeight - (BorderOffset / 2.0))
{
this.resizeOption = ResizeValues.Bottom;
Mouse.OverrideCursor = Cursors.SizeNS;
}
else if (position.X <= (BorderOffset / 2.0))
{
this.resizeOption = ResizeValues.Left;
Mouse.OverrideCursor = Cursors.SizeWE;
}
else if (position.X >= this.border.ActualWidth - (BorderOffset / 2.0))
{
this.resizeOption = ResizeValues.Right;
Mouse.OverrideCursor = Cursors.SizeWE;
}
else
{
Mouse.OverrideCursor = null;
this.resizeOption = ResizeValues.NONE;
}
Point topLeft = ExtensionSurface.GetPosition(this);
this.bottomRight = new Point(topLeft.X + Width, topLeft.Y + Height);
}
else if (Mouse.OverrideCursor != null)
{
Mouse.OverrideCursor = null;
this.resizeOption = ResizeValues.NONE;
}
}
else if (e.LeftButton == MouseButtonState.Pressed)
{
this.HandleWindowResize();
}
}
void PlaceWindow(ExtensionWindow window)
{
if (null != window)
{
FrameworkElement target = ExtensionSurface.GetPlacementTarget(window);
PositionAlignment alignment = ExtensionSurface.GetAlignment(window);
PlacementMode mode = ExtensionSurface.GetMode(window);
Point position = ExtensionSurface.GetPosition(window);
Point calculatedPosition = new Point();
FrameworkElement commonRoot = null;
MatrixTransform transform = null;
switch (mode)
{
case PlacementMode.Relative:
if (null != target)
{
commonRoot = target.FindCommonVisualAncestor(this) as FrameworkElement;
if (null == commonRoot)
{
return;
}
transform = (MatrixTransform)target.TransformToAncestor(commonRoot);
}
else
{
if (!DesignerProperties.GetIsInDesignMode(this))
{
Fx.Assert(string.Format(CultureInfo.InvariantCulture, "PlacementTarget must be set in RelativeMode on ExtensionSurface '{0}'", this.Name));
}
}
break;
case PlacementMode.Absolute:
calculatedPosition = position;
break;
default:
Fx.Assert(string.Format(CultureInfo.CurrentCulture, "ExtensionWindowPlacement.Mode {0} specified in ExtensionWindow '{1}' is not supported for ExtensionSurface", mode, window.Name));
return;
}
if (PlacementMode.Relative == mode)
{
if (null != target)
{
double x;
double y;
switch (alignment)
{
case PositionAlignment.LeftTop:
calculatedPosition = transform.Transform(calculatedPosition);
break;
case PositionAlignment.LeftBottom:
calculatedPosition = transform.Transform(new Point(0.0, target.ActualHeight));
break;
case PositionAlignment.RightTop:
calculatedPosition = transform.Transform(new Point(target.ActualWidth, 0.0));
break;
case PositionAlignment.RightBottom:
calculatedPosition = transform.Transform(new Point(target.ActualWidth, target.ActualHeight));
break;
case PositionAlignment.Center:
calculatedPosition = transform.Transform(calculatedPosition);
x = ((target.ActualWidth * transform.Matrix.M11) - window.Width) / 2.0;
y = ((target.ActualHeight * transform.Matrix.M22) - window.Height) / 2.0;
calculatedPosition.Offset(x, y);
break;
case PositionAlignment.CenterHorizontal:
calculatedPosition = transform.Transform(calculatedPosition);
x = ((target.ActualWidth * transform.Matrix.M11) - window.Width) / 2.0;
calculatedPosition.Offset(x, 0.0);
break;
case PositionAlignment.CenterVertical:
calculatedPosition = transform.Transform(calculatedPosition);
y = ((target.ActualHeight * transform.Matrix.M22) - window.Height) / 2.0;
calculatedPosition.Offset(0.0, y);
break;
default:
Fx.Assert(string.Format(CultureInfo.CurrentCulture, "ExtensionWindowPlacement.Position = '{0}' is not supported", alignment));
return;
}
}
}
SetWindowPosition(window, calculatedPosition);
}
}
