private void UpdateRowHeight(DependencyObject child)
{
object objHeight = child.GetValue(AutoGrid.RowHeightProperty);
if (AutoGrid.WasSet(objHeight))
{
GridLength rowHeight = (GridLength)objHeight;
RowDefinition row = this.RowDefinitions[(int)child.GetValue(Grid.RowProperty)];
if (rowHeight != row.Height)
{
row.Height = rowHeight;
}
}
else
{
FrameworkElement fe = child as FrameworkElement;
if (fe != null && !(fe.MaxHeight < double.MaxValue || 0 < fe.Height))
{
TextBox textBox;
// Do not replace ListBox, ListView,... with ItemsControl. As too many of controls are ItemsControls.
if (fe is GroupBox || fe is RichTextBox || fe is TreeView || fe is ListView || fe is ListBox || fe is DataGrid ||
(textBox = fe as TextBox) != null && textBox.AcceptsReturn && !(1 < textBox.MinLines || textBox.MaxLines < int.MaxValue)
)
{
RowDefinition row = this.RowDefinitions[(int)child.GetValue(Grid.RowProperty)];
if (row.Height == GridLength.Auto)
{
row.Height = new GridLength(1, GridUnitType.Star);
}
}
}
}
}
private static int DesiredColumn(UIElement child)
{
object column = child.ReadLocalValue(Grid.ColumnProperty);
if (AutoGrid.WasSet(column))
{
return((int)column);
}
return(-1);
}
private int DefineColumns()
{
Debug.Assert(this.ColumnDefinitions.Count == 0);
Debug.Assert(this.RowDefinitions.Count == 0);
int count = 0;
foreach (GridLength gridLength in AutoGrid.ParseColumnWidths(this.ColumnWidths))
{
this.ColumnDefinitions.Add(new ColumnDefinition()
{
Width = gridLength
});
count++;
}
return(count);
}
private void LinkLabels()
{
for (int i = 0; i < this.Children.Count; i++)
{
UIElement child = this.Children[i];
if (child is Label label && i + 1 < this.Children.Count && !AutoGrid.WasSet(label.Target) && label.GetBindingExpression(Label.TargetProperty) == null)
{
UIElement next = this.Children[i + 1];
if (!(next is Panel) && !(next is GroupBox) && next.Focusable &&
(int)label.GetValue(Grid.RowProperty) == (int)next.GetValue(Grid.RowProperty) &&
(int)label.GetValue(Grid.ColumnProperty) == 0 &&
(int)next.GetValue(Grid.ColumnProperty) == 1
)
{
label.Target = next;
}
}
}
}
private void PlaceChildren()
{
int maxColumns = this.DefineColumns();
int column = 0;
int row = 0;
foreach (UIElement child in this.Children)
{
int desiredColumn = AutoGrid.DesiredColumn(child);
Debug.Assert(-1 <= desiredColumn && desiredColumn < maxColumns);
if (0 <= desiredColumn)
{
if (desiredColumn < column)
{
row++;
}
column = desiredColumn;
}
else if (maxColumns <= column)
{
column = 0;
row++;
}
if (this.RowDefinitions.Count <= row)
{
this.RowDefinitions.Add(new RowDefinition()
{
Height = GridLength.Auto
});
}
if (desiredColumn != column)
{
child.SetValue(Grid.ColumnProperty, column);
}
child.SetValue(Grid.RowProperty, row);
int columnSpan = (int)child.GetValue(Grid.ColumnSpanProperty);
Debug.Assert(column + columnSpan <= maxColumns);
column += columnSpan;
this.UpdateRowHeight(child);
}
}
