private void CalcColumnWidthes(MeasureData[] data, double widthConstrait)
{
var columnDefinitions = PanelContainer.ColumnDefinitions.ToArray();
if (data.Length <= 0)
{
return;
}
var columnData = new ColumnData[data[data.Length - 1].ColumnIndex + 1];
for (int i = 0; i < columnData.Length; i++)
{
columnData[i] = i < columnDefinitions.Length ?
new ColumnData(columnDefinitions[i]) : new ColumnData();
}
foreach (MeasureData child in data
.Where(child => child.ColumnIndex >= columnDefinitions.Length))
{
columnData[child.ColumnIndex].Minimum =
Math.Max(child.DesiredSize.Width, columnData[child.ColumnIndex].Minimum);
}
bool stretchAuto = !columnData.Any(column => column.Value.IsStar) &&
PanelContainer.HorizontalContentAlignment == HorizontalAlignment.Stretch;
foreach (ColumnData column in columnData)
{
if (column.Value.IsAuto && stretchAuto)
{
column.Value = new GridLength(1, GridUnitType.Star);
}
else if (!column.IsStar)
{
column.ActualValue = column.IsAuto ? column.Minimum :
Math.Min(column.Maximum, Math.Max(column.Minimum, column.Value.Value));
column.Final = true;
}
}
DistributeStarWidth(columnData, widthConstrait);
double extraSpace = Math.Max(0, widthConstrait - columnData.Sum(column => column.ActualValue));
double accumulatedWidth = 0;
foreach (ColumnData column in columnData)
{
column.Offset = accumulatedWidth;
switch (PanelContainer.HorizontalContentAlignment)
{
case HorizontalAlignment.Center:
column.Offset += extraSpace / 2;
break;
case HorizontalAlignment.Right:
column.Offset += extraSpace;
break;
}
accumulatedWidth += column.ActualValue;
}
for (var i = 0; i < data.Length; i++)
{
var rect = data[i].Rect;
rect.X = columnData[data[i].ColumnIndex].Offset;
rect.Width = data[i].DesiredSize.Width;
switch (data[i].HorizontalAlignment)
{
case HorizontalAlignment.Center:
rect.X += (columnData[data[i].ColumnIndex].ActualValue - rect.Width) / 2;
break;
case HorizontalAlignment.Right:
rect.X += columnData[data[i].ColumnIndex].ActualValue - rect.Width;
break;
case HorizontalAlignment.Stretch:
rect.Width = columnData[data[i].ColumnIndex].ActualValue;
break;
}
data[i].Rect = rect;
}
}