public ToolBoxGrid()
{
SizeChanged +=
delegate
{
var lastRowDefinition = RowDefinitions.Last();
var rowsHeight = RowDefinitions.Sum(rd => rd.ActualHeight);
lastRowDefinition.Height = new GridLength(Math.Max(LastRowMinHeight, ActualHeight - rowsHeight + lastRowDefinition.ActualHeight));
};
}
protected override void OnInitialized(EventArgs e0)
{
base.OnInitialized(e0);
var parent = Parent as FrameworkElement;
parent.SizeChanged +=
(sender, e) =>
{
var heightDiff = e.NewSize.Height - e.PreviousSize.Height;
if (heightDiff < 0)
{
RowDefinitions.Last().Height = new GridLength(LastRowMinHeight);
}
};
}
private void Initialize()
{
if (!_hasLoaded && !String.IsNullOrWhiteSpace(Rows))
{
var heights = GridLengthParser.FromString(Rows);
foreach (var height in heights)
{
RowDefinitions.Add(new RowDefinition {
Height = height
});
}
}
if (!_hasLoaded && !String.IsNullOrWhiteSpace(Columns))
{
var widths = GridLengthParser.FromString(Columns);
foreach (var width in widths)
{
ColumnDefinitions.Add(new ColumnDefinition {
Width = width
});
}
}
_hasLoaded = true;
for (int i = ColumnDefinitions.Count; i < NumColumns; i++)
{
ColumnDefinitions.Add(new ColumnDefinition {
Width = ColumnWidth
});
}
if (RowDefinitions.Count == 0)
{
RowDefinitions.Add(new RowDefinition {
Height = RowHeight
});
}
var currentColumn = 0;
var currentRow = 0;
var columnCount = ColumnDefinitions.Count == 0 ? 1 : ColumnDefinitions.Count; //if we have no col defs we have one col.
foreach (var child in Children)
{
if (!GetAutoplace((UIElement)child))
{
continue;
}
var childColumnSpan = GetColumnSpan((FrameworkElement)child);
var childRowSpan = GetRowSpan((FrameworkElement)child);
var placed = false;
while (!placed)
{
var cellsLeft = columnCount - currentColumn;
if (currentColumn != 0 && cellsLeft < childColumnSpan) //can't fit this row
{
currentRow = GetNextRowAndAddIfRequired(currentRow);
currentColumn = 0;
continue;
}
if (IsFull(currentRow, currentColumn, childColumnSpan))
{
currentColumn++;
continue;
}
SetColumn((FrameworkElement)child, currentColumn);
SetRow((FrameworkElement)child, currentRow);
AddSpannedCells(currentRow, currentColumn, childRowSpan, childColumnSpan);
currentColumn += childColumnSpan;
placed = true;
}
}
if (StretchLastRow)
{
RowDefinitions.Last().Height = new GridLength(1, GridUnitType.Star);
}
}