/// <summary>
/// Gets the width allocated to the right block.
/// </summary>
/// <param name="width">The total width available.</param>
/// <param name="leftPreferredWidth">The width preferred by the left block.</param>
/// <param name="centerPreferredWidth">The width preferred by the center block.</param>
/// <param name="rightPreferredWidth">The width preferred by the right block.</param>
/// <returns>The allocated width.</returns>
private double GetWidthAllocatedToRightBlock(double width, double?leftPreferredWidth, double?centerPreferredWidth, double?rightPreferredWidth)
{
if (this.rightBlock == null)
{
return(0);
}
// There is a right block.
if (rightPreferredWidth != null)
{
return(rightPreferredWidth.Value);
}
// The right block is flexible.
if (this.centerBlock == null)
{
// There is no center block
if (this.leftBlock == null)
{
// There is no left block.
return(width);
}
// There is a left block.
if (leftPreferredWidth != null)
{
// The left block is not flexible.
return(width - (leftPreferredWidth.Value + this.Layout.objectSpacing));
}
// The left block is flexible
return((width - this.Layout.objectSpacing) / 2);
}
// There is a center block
if (centerPreferredWidth != null)
{
// The center block is fixed.
return(((width - centerPreferredWidth.Value) / 2) - this.Layout.objectSpacing);
}
// The center block is flexible
if (this.leftBlock == null)
{
// There is no left block.
// The flexible right block must share the right side with half of the center block.
return(((width / 2) - this.Layout.objectSpacing) / 1.5);
}
// There is a left block.
if (leftPreferredWidth != null)
{
// The left block is not flexible.
return(LuaMath.max(leftPreferredWidth.Value, (((width / 2) - this.Layout.objectSpacing) / 3) * 2));
}
// The left block is flexible
return((width - (this.Layout.objectSpacing * 2)) / 3);
}
public override double?GetPreferredWidth()
{
var innerPreferredWidth = this.Inner.GetPreferredWidth();
if (innerPreferredWidth != null)
{
return(LuaMath.max((double)innerPreferredWidth, this.textLabel.GetWidth()));
}
return(null);
}
/// <summary>
/// Gets the preferred height of the page.
/// </summary>
/// <returns>The preferred height. Null if it is flexible.</returns>
public double?GetPreferredHeight()
{
var heights = this.Content.Select(line => line.GetPreferredHeight()).ToArray();
if (!heights.Any(h => h == null))
{
return(heights.Sum() + (this.Layout.lineSpacing * LuaMath.max(this.Content.Count - 1, 0)));
}
return(null);
}
protected override void SizeChanged()
{
var obj = this.FirstChild;
double width = 0;
double height = 0;
while (obj != null)
{
width += obj.Object.GetWidth();
height = LuaMath.max(height, obj.Object.GetHeight());
obj = obj.Next;
}
this.frame.SetWidth(width);
this.frame.SetHeight(height);
}
/// <summary>
/// Gets the width allocated to the center block.
/// </summary>
/// <param name="width">The total width available.</param>
/// <param name="leftPreferredWidth">The width preferred by the left block.</param>
/// <param name="centerPreferredWidth">The width preferred by the center block.</param>
/// <param name="rightPreferredWidth">The width preferred by the right block.</param>
/// <returns>The allocated width.</returns>
private double GetWidthAllocatedToCenterBlock(double width, double?leftPreferredWidth, double?centerPreferredWidth, double?rightPreferredWidth)
{
if (this.centerBlock == null)
{
return(0);
}
// There is a center block.
if (centerPreferredWidth != null)
{
return(centerPreferredWidth.Value);
}
// The center block is flexible.
if (this.leftBlock == null)
{
// There is no left block
if (this.rightBlock == null)
{
// There is no right block.
return(width);
}
// There is a right block.
if (rightPreferredWidth != null)
{
// The right block is not flexible.
return(((width / 2) - (rightPreferredWidth.Value + this.Layout.objectSpacing)) * 2);
}
// The right block is flexible
return((((width / 2) - this.Layout.objectSpacing) / 3) * 2);
}
// There is a left block
var halfWidthMinusOneObjectSpacing = (width / 2) - this.Layout.objectSpacing;
if (leftPreferredWidth != null)
{
// The left block is fixed.
if (this.rightBlock != null && rightPreferredWidth != null)
{
// There is a fixed right block.
return((((width / 2) - LuaMath.max(leftPreferredWidth.Value, rightPreferredWidth.Value)) - this.Layout.objectSpacing) * 2);
}
if (this.rightBlock != null)
{
// There is a flexible right block.
return(LuaMath.min((halfWidthMinusOneObjectSpacing / 3) * 2, (halfWidthMinusOneObjectSpacing - leftPreferredWidth.Value) * 2));
}
// There is no right block.
return((halfWidthMinusOneObjectSpacing - leftPreferredWidth.Value) * 2);
}
// The left block is flexible
if (this.rightBlock == null)
{
// There is no right block.
// The flexible center block must share the center side with half of the left block.
return((halfWidthMinusOneObjectSpacing / 3) * 2);
}
// There is a right block.
if (rightPreferredWidth != null)
{
// The right block is not flexible.
return(LuaMath.min((halfWidthMinusOneObjectSpacing / 3) * 2, (halfWidthMinusOneObjectSpacing - rightPreferredWidth.Value) * 2));
}
// The right block is flexible
return((width - (this.Layout.objectSpacing * 2)) / 3);
}