/// <summary>
/// Insert an item at the given index.
/// </summary>
/// <param name="item"></param>
public VCItemPlacement Insert(int index, VCItem item, Layout.LayoutConstraints constraints)
{
VCItemPlacement placement = new VCItemPlacement(item, constraints);
items.Insert(index, placement);
item.ContainerEvent += new EventHandler <ContainerEventArgs>(item_ContainerEvent);
if (Added != null)
{
Added(this, new VCItemPlacementEventArgs(placement));
}
return(placement);
}
/// <summary>
/// Replace the item at given index with given item
/// </summary>
/// <param name="item"></param>
public VCItemPlacement Replace(int index, VCItem item, Layout.LayoutConstraints constraints)
{
VCItemPlacement oldPlacement = items[index];
oldPlacement.Item.ContainerEvent -= new EventHandler <ContainerEventArgs>(item_ContainerEvent);
VCItemPlacement placement = new VCItemPlacement(item, constraints);
item.ContainerEvent += new EventHandler <ContainerEventArgs>(item_ContainerEvent);
items[index] = placement;
if (Removed != null)
{
Removed(this, new VCItemPlacementEventArgs(oldPlacement));
}
if (Added != null)
{
Added(this, new VCItemPlacementEventArgs(placement));
}
return(placement);
}
/// <summary>
/// Set the locations of the given placements.
/// </summary>
/// <param name="placements">All placements that must be layed out.</param>
/// <param name="controlSize">The size of the control (in virtual units)</param>
public virtual void Layout(ICollection <VCItemPlacement> placements, SizeF controlSize)
{
if (placements.Count > 0)
{
// Calculate preferred size
int maxHeight = 0;
int width = padding.Horizontal + (Math.Max(0, placements.Count - 1) * itemSpacing);
foreach (VCItemPlacement placement in placements)
{
Size itemSz = placement.Item.PreferredSize;
maxHeight = Math.Max(maxHeight, itemSz.Height + padding.Vertical);
width += itemSz.Width;
}
this.preferredSize = new Size(width, maxHeight);
// Calculate horizontal displacement to deal with horizontal alignment
int x = padding.Left;
if (width < controlSize.Width)
{
switch (vAlignment)
{
default:
case VerticalAlignment.Top:
break;
case VerticalAlignment.Middle:
x += (int)((controlSize.Width - width - padding.Horizontal) / 2);
break;
case VerticalAlignment.Bottom:
x += (int)(controlSize.Width - width - padding.Right);
break;
}
}
// Calculate final size
this.size = new Size(Math.Max(width, (int)controlSize.Width), maxHeight);
// Calculate item bounds
foreach (VCItemPlacement placement in placements)
{
Size itemSize = placement.Item.PreferredSize;
LayoutConstraints constraints = placement.Constraints;
if (constraints != null)
{
if ((constraints.Fill & FillDirection.Vertical) != 0)
{
itemSize.Height = maxHeight - padding.Vertical;
}
}
int y;
switch (vAlignment)
{
default:
case VerticalAlignment.Top:
y = padding.Top;
break;
case VerticalAlignment.Middle:
y = Math.Max(padding.Top, (int)((Math.Max(controlSize.Height, maxHeight) - itemSize.Height) / 2));
break;
case VerticalAlignment.Bottom:
y = Math.Max(padding.Top, (int)(Math.Max(controlSize.Height, maxHeight) - padding.Bottom));
break;
}
placement.Bounds = new Rectangle(new Point(x, y), itemSize);
x += itemSize.Width + itemSpacing;
}
}
else
{
this.preferredSize = Size.Empty;
this.size = Size.Empty;
}
}
/// <summary>
/// Default ctor
/// </summary>
/// <param name="item"></param>
internal VCItemPlacement(VCItem item, Layout.LayoutConstraints constraints)
{
this.item = item;
this.constraints = constraints;
transform = Identity;
}
/// <summary>
/// Set the locations of the given placements.
/// </summary>
/// <param name="placements">All placements that must be layed out.</param>
/// <param name="controlSize">The size of the control (in virtual units)</param>
public virtual void Layout(ICollection <VCItemPlacement> placements, SizeF controlSize)
{
if (placements.Count > 0)
{
// Calculate maximum width and total height
int maxWidth = 0;
int maxHeight = 0;
foreach (VCItemPlacement placement in placements)
{
Size itemSz = placement.Item.PreferredSize;
maxWidth = Math.Max(maxWidth, itemSz.Width + padding.Horizontal);
maxHeight = Math.Max(maxHeight, itemSz.Height + padding.Vertical);
}
// Calculate final size
this.preferredSize = this.size = new Size(maxWidth, maxHeight);
// Calculate item bounds
foreach (VCItemPlacement placement in placements)
{
Size itemSize = placement.Item.PreferredSize;
LayoutConstraints constraints = placement.Constraints;
if (constraints != null)
{
if ((constraints.Fill & FillDirection.Horizontal) != 0)
{
itemSize.Width = maxWidth - padding.Horizontal;
}
if ((constraints.Fill & FillDirection.Vertical) != 0)
{
itemSize.Height = maxHeight - padding.Vertical;
}
}
int x;
switch (hAlignment)
{
default:
case HorizontalAlignment.Left:
x = padding.Left;
break;
case HorizontalAlignment.Center:
x = Math.Max(padding.Left, (int)((Math.Max(controlSize.Width, maxWidth) - itemSize.Width) / 2));
break;
case HorizontalAlignment.Right:
x = Math.Max(padding.Left, (int)(Math.Max(controlSize.Width, maxWidth) - padding.Right));
break;
}
int y;
switch (vAlignment)
{
default:
case VerticalAlignment.Top:
y = padding.Top;
break;
case VerticalAlignment.Middle:
y = Math.Max(padding.Top, (int)((Math.Max(controlSize.Height, maxHeight) - itemSize.Height) / 2));
break;
case VerticalAlignment.Bottom:
y = Math.Max(padding.Top, (int)(Math.Max(controlSize.Height, maxHeight) - padding.Bottom));
break;
}
Rectangle bounds = new Rectangle(new Point(x, y), itemSize);
placement.Bounds = bounds;
size.Width = Math.Max(size.Width, bounds.Right);
size.Height = Math.Max(size.Height, bounds.Bottom);
}
}
else
{
this.preferredSize = Size.Empty;
this.size = Size.Empty;
}
}
