public void BuildRowStructure(double available_width)
{
FormRowData new_row = new FormRowData();
double width = 0d;
for (int i = 0; i < _fields.Length; i++)
{
FormFieldData field = _fields[i];
if (field == null) // This is a NewLine.
{
if (new_row.Fields.Count > 0)
{
_rows.Add(new_row);
}
new_row = new FormRowData();
width = 0d;
}
else // field is not null
{
if ((width + field.Width) > available_width) // wrap the formfield to a new line.
{
if (new_row.Fields.Count > 0)
{
_rows.Add(new_row);
}
new_row = new FormRowData();
width = 0;
}
new_row.Fields.Add(field);
width += field.Width;
}
}
if (new_row.Fields.Count > 0)
{
_rows.Add(new_row);
}
}
private void InitializeFieldDataObjects()
{
for (int i = 0; i < this.Children.Count; i++)
{
FrameworkElement element = this.Children[i] as FrameworkElement;
if (element == null)
{
throw new Exception("a Form child is not a FrameworkElement");
}
if (element.ReadLocalValue(FrameworkElement.WidthProperty) != DependencyProperty.UnsetValue)
{
throw new Exception("Do not set the Width property for Form children.");
}
if (element is FormField)
{
double fieldwidth = ((FormField)element).FieldWidth;
// Measure the element
element.Measure(new Size(fieldwidth, double.PositiveInfinity));
var desired = element.DesiredSize;
_fields[i] = new FormFieldData
{
Width = fieldwidth,
Height = desired.Height
};
}
else if (element is NewLine)
{
_fields[i] = null;
}
else
{
throw new Exception("unknown element type");
}
}
}