private double GetMaxLength(DefinitionBase definition)
{
if (definition == null)
return 0;
var columnDefinition = definition as ColumnDefinition;
return columnDefinition?.MaxWidth ?? ((RowDefinition) definition).MaxHeight;
}
private double GetActualLength(DefinitionBase definition)
{
if (definition == null)
return 0;
var columnDefinition = definition as ColumnDefinition;
return columnDefinition?.ActualWidth ?? ((RowDefinition) definition).ActualHeight;
}
protected override void OnAttachedToVisualTree(VisualTreeAttachmentEventArgs e)
{
base.OnAttachedToVisualTree(e);
_grid = this.GetVisualParent<Grid>();
if (Orientation == Orientation.Vertical)
{
Cursor = new Cursor(StandardCursorType.SizeWestEast);
var col = GetValue(Grid.ColumnProperty);
_definitions = _grid.ColumnDefinitions.Cast<DefinitionBase>().ToList();
_prevDefinition = _definitions[col - 1];
_nextDefinition = _definitions[col + 1];
}
else
{
Cursor = new Cursor(StandardCursorType.SizeNorthSouth);
var row = GetValue(Grid.RowProperty);
_definitions = _grid.RowDefinitions.Cast<DefinitionBase>().ToList();
_prevDefinition = _definitions[row - 1];
_nextDefinition = _definitions[row + 1];
}
}
private void SetLengthInStars(DefinitionBase definition, double value)
{
var columnDefinition = definition as ColumnDefinition;
if (columnDefinition != null)
{
columnDefinition.Width = new GridLength(value, GridUnitType.Star);
}
else
{
((RowDefinition)definition).Height = new GridLength(value, GridUnitType.Star);
}
}
private bool IsStar(DefinitionBase definition)
{
var columnDefinition = definition as ColumnDefinition;
return columnDefinition?.Width.IsStar ?? ((RowDefinition)definition).Height.IsStar;
}
private double GetMinLength(DefinitionBase definition)
{
var columnDefinition = definition as ColumnDefinition;
return columnDefinition?.MinWidth ?? ((RowDefinition)definition).MinHeight;
}
protected override void OnAttachedToVisualTree(VisualTreeAttachmentEventArgs e)
{
base.OnAttachedToVisualTree(e);
_grid = this.GetVisualParent<Grid>();
_orientation = DetectOrientation();
int defenitionIndex; //row or col
if (_orientation == Orientation.Vertical)
{
Cursor = new Cursor(StandardCursorType.SizeWestEast);
_definitions = _grid.ColumnDefinitions.Cast<DefinitionBase>().ToList();
defenitionIndex = GetValue(Grid.ColumnProperty);
PseudoClasses.Add(":vertical");
}
else
{
Cursor = new Cursor(StandardCursorType.SizeNorthSouth);
defenitionIndex = GetValue(Grid.RowProperty);
_definitions = _grid.RowDefinitions.Cast<DefinitionBase>().ToList();
PseudoClasses.Add(":horizontal");
}
if (defenitionIndex > 0)
_prevDefinition = _definitions[defenitionIndex - 1];
if (defenitionIndex < _definitions.Count - 1)
_nextDefinition = _definitions[defenitionIndex + 1];
}
private bool IsStar(DefinitionBase definition)
{
var columnDefinition = definition as ColumnDefinition;
return(columnDefinition?.Width.IsStar ?? ((RowDefinition)definition).Height.IsStar);
}
/// <summary>
/// Adds / registers a definition instance.
/// </summary>
internal void AddMember(DefinitionBase member)
{
Debug.Assert(!_registry.Contains(member));
_registry.Add(member);
Invalidate();
}
