protected virtual IEnumerable <KeyValuePair <IVisualElement, ValueRenderRectangle> > GetRenderables(
Orientations orientation,
IRenderRectangle bounds)
{
lock (_measureLock)
{
var current = ValueRenderRectangle.Empty;
foreach (var child in _currentlyRendering)
{
current = GetElementBounds(child, current);
current = GetElementRenderBounds(child, current, orientation,
bounds);
yield return(new KeyValuePair <IVisualElement, ValueRenderRectangle>(child, current));
}
}
}
public static Boolean AreRenderRectsEquals <TRect>(TRect left,
IRenderRectangle right)
where TRect : IRenderRectangle
{
return(AreRectsEqual(left, right) && left.Size.Offset.Equals(right.Size.Offset));
}
private static ValueRenderRectangle GetElementRenderBounds(IVisualElement child,
ValueRenderRectangle current,
Orientations orientation,
IRenderRectangle bounds)
{
var useX = current.X;
var useY = current.Y;
switch (orientation)
{
case Orientations.Vertical:
// may need to adjust the X based on alignment
var useHorzAlign = child.HorizontalAlignment;
switch (useHorzAlign)
{
case HorizontalAlignments.Right:
useX += bounds.Width - current.Width;
break;
case HorizontalAlignments.Center:
useX += (bounds.Width - current.Width) / 2;
break;
case HorizontalAlignments.Left:
case HorizontalAlignments.Default:
case HorizontalAlignments.Stretch:
break;
default:
throw new ArgumentOutOfRangeException();
}
break;
case Orientations.Horizontal:
var useVertAlign = child.VerticalAlignment;
switch (useVertAlign)
{
case VerticalAlignments.Bottom:
useY += bounds.Height - current.Height;
break;
case VerticalAlignments.Center:
useY += (bounds.Height - current.Height) / 2;
break;
case VerticalAlignments.Top:
case VerticalAlignments.Default:
case VerticalAlignments.Stretch:
break;
default:
throw new ArgumentOutOfRangeException();
}
break;
}
current = new ValueRenderRectangle(useX, useY,
//bounds.Width, //this draws things (picture frame) too wide
current.Width,
current.Height, current.Offset);
return(current);
}
public ValueRenderRectangle(IRenderRectangle rect,
Thickness?padding)
: this(rect.Location, rect.Size, rect.Size.Offset, padding)
{
}
public Boolean Equals(IRenderRectangle other)
{
return(GeometryHelper.AreRenderRectsEquals(this, other));
}
