internal static Thickness CreateGripThickness(double visibleGripWidth, ResizeGripLocation gripLocation)
{
Thickness thickness;
if (visibleGripWidth < 0.0 || Double.IsNaN(visibleGripWidth))
{
throw new ArgumentOutOfRangeException("visibleGripWidth", "The value must be greater than or equal to 0." );
}
if (Double.IsInfinity(visibleGripWidth))
{
throw new ArgumentOutOfRangeException("visibleGripWidth", "The value must be less than infinity.");
}
switch (gripLocation)
{
case ResizeGripLocation.Right:
thickness = new Thickness(0, 0, visibleGripWidth, 0);
break;
case ResizeGripLocation.Left:
thickness = new Thickness(visibleGripWidth, 0, 0, 0);
break;
default:
throw new InvalidEnumArgumentException("gripLocation", (int) gripLocation, typeof(ResizeGripLocation));
}
return thickness;
}
internal static Thickness CreateGripThickness(double visibleGripWidth, ResizeGripLocation gripLocation)
{
Thickness thickness;
if (visibleGripWidth < 0.0 || double.IsNaN(visibleGripWidth))
{
throw new ArgumentOutOfRangeException("visibleGripWidth", "The value must be greater than or equal to 0.");
}
if (double.IsInfinity(visibleGripWidth))
{
throw new ArgumentOutOfRangeException("visibleGripWidth", "The value must be less than infinity.");
}
switch (gripLocation)
{
case ResizeGripLocation.Right:
thickness = new Thickness(0, 0, visibleGripWidth, 0);
break;
case ResizeGripLocation.Left:
thickness = new Thickness(visibleGripWidth, 0, 0, 0);
break;
default:
throw new InvalidEnumArgumentException("gripLocation", (int)gripLocation, typeof(ResizeGripLocation));
}
return(thickness);
}
private double GetNewWidth(ResizeGripLocation location, double horzDelta)
{
var realDelta = this.GetHorizontalDelta(location, horzDelta);
double newWidth = this.ActualWidth + realDelta;
return(this.GetConstrainedValue(newWidth, this.MaxWidth, this.MinWidth));
}
private void StopDragging(ResizeGripLocation location, DragCompletedEventArgs e)
{
if (this.ResizeWhileDragging == false)
{
this.RemoveAdorner();
double newWidth = this.GetNewWidth(location, e.HorizontalChange);
this.Width = newWidth;
}
}
private void PerformDrag(ResizeGripLocation location, DragDeltaEventArgs e)
{
double newWidth = this.GetNewWidth(location, e.HorizontalChange);
if (this.ResizeWhileDragging)
{
this.Width = newWidth;
}
else
{
this.adorner.Width = newWidth;
}
}
private void StartDragging(ResizeGripLocation location)
{
if (this.ResizeWhileDragging == false)
{
if (this.adornerLayer == null)
{
this.CreateAdorner();
}
this.adornerContent.Content = location;
this.adornerLayer.Add(this.adorner);
this.adorner.Height = this.ActualHeight;
this.adorner.Width = this.ActualWidth;
}
}
private double GetHorizontalDelta(ResizeGripLocation location, double horzDelta)
{
double realDelta;
if (location == ResizeGripLocation.Right)
{
realDelta = horzDelta;
}
else
{
Debug.Assert(location == ResizeGripLocation.Left, "location is left");
realDelta = -horzDelta;
}
return(realDelta);
}
/// <summary>
/// Sets the location for a grip.
/// </summary>
/// <param name="element">The dependency object that the property will be attached to.</param>
/// <param name="value">The new value.</param>
static public void SetThumbGripLocation(DependencyObject element, ResizeGripLocation value)
{
element.SetValue(ThumbGripLocationProperty, value);
}
private double GetHorizontalDelta(ResizeGripLocation location, double horzDelta)
{
double realDelta;
if (location == ResizeGripLocation.Right)
{
realDelta = horzDelta;
}
else
{
Debug.Assert(location == ResizeGripLocation.Left);
realDelta = -horzDelta;
}
return realDelta;
}
private double GetNewWidth(ResizeGripLocation location, double horzDelta)
{
var realDelta = this.GetHorizontalDelta(location, horzDelta);
double newWidth = this.ActualWidth + realDelta;
return this.GetConstrainedValue(newWidth, this.MaxWidth, this.MinWidth);
}
private void StopDragging(ResizeGripLocation location, DragCompletedEventArgs e)
{
if (false == this.ResizeWhileDragging)
{
this.RemoveAdorner();
double newWidth = this.GetNewWidth(location, e.HorizontalChange);
this.Width = newWidth;
}
}
private void StartDragging(ResizeGripLocation location)
{
if (false == this.ResizeWhileDragging)
{
if (this.adornerLayer == null)
{
this.CreateAdorner();
}
this.adornerContent.Content = location;
this.adornerLayer.Add(this.adorner);
this.adorner.Height = this.ActualHeight;
this.adorner.Width = this.ActualWidth;
}
}
private void PerformDrag(ResizeGripLocation location, DragDeltaEventArgs e)
{
double newWidth = this.GetNewWidth(location, e.HorizontalChange);
if (this.ResizeWhileDragging)
{
this.Width = newWidth;
}
else
{
this.adorner.Width = newWidth;
}
}
