private void ItemsOwner_TileDragEnded(object sender, TileViewDragEventArgs e)
{
Mouse.Capture(null);
(e.DraggedItem as FrameworkElement).ReleaseMouseCapture();
var columnWidth = this.DesiredSize.Width / this.ColumnsCount;
var rowHeight = this.DesiredSize.Height / this.RowsCount;
var column = (int)(this.lastMousePosition.X / columnWidth);
var row = (int)(this.lastMousePosition.Y / rowHeight);
var item = e.DraggedItem as RadTileViewItem;
if (!this.TrySwapTiles(item, this.secondTile))
{
var currentRow = TileViewAttachedProperties.GetRow(item);
var currentColumn = TileViewAttachedProperties.GetColumn(item);
var rowSpan = TileViewAttachedProperties.GetRowSpan(item);
var columnSpan = TileViewAttachedProperties.GetColumnSpan(item);
this.MarkCells(currentRow, currentColumn, rowSpan, columnSpan, false);
TileViewAttachedProperties.SetColumn(item, column);
TileViewAttachedProperties.SetRow(item, row);
this.FixOverlapping(row, column, rowSpan, columnSpan);
}
this.secondTile = null;
this.isTileDragged = false;
this.InvalidateMeasure();
}
private bool TrySwapTiles(RadTileViewItem tile1, RadTileViewItem tile2)
{
if (tile1 == null || tile2 == null)
{
return(false);
}
var fColumn = TileViewAttachedProperties.GetColumn(tile1);
var fRow = TileViewAttachedProperties.GetRow(tile1);
var fRowSpan = TileViewAttachedProperties.GetRowSpan(tile1);
var fColumnSpan = TileViewAttachedProperties.GetColumnSpan(tile1);
var sColumn = TileViewAttachedProperties.GetColumn(tile2);
var sRow = TileViewAttachedProperties.GetRow(tile2);
var sRowSpan = TileViewAttachedProperties.GetRowSpan(tile2);
var sColumnSpan = TileViewAttachedProperties.GetColumnSpan(tile2);
this.MarkCells(fRow, fColumn, fRowSpan, fColumnSpan, false);
this.MarkCells(sRow, sColumn, sRowSpan, sColumnSpan, false);
TileViewAttachedProperties.SetColumn(tile1, sColumn);
TileViewAttachedProperties.SetRow(tile1, sRow);
TileViewAttachedProperties.SetColumn(tile2, fColumn);
TileViewAttachedProperties.SetRow(tile2, fRow);
this.MarkCells(sRow, sColumn, fRowSpan, fColumnSpan, true);
this.MarkCells(fRow, fColumn, sRowSpan, sColumnSpan, true);
this.FixOverlapping(sRow, sColumn, fRowSpan, fColumnSpan);
this.FixOverlapping(fRow, fColumn, sRowSpan, sColumnSpan);
return(true);
}
private void FixOverlapping(int row, int column, int rowSpan, int columnSpan)
{
var overlappingTiles = GetOverlappingTiles(row, column, rowSpan, columnSpan);
foreach (var tile in overlappingTiles)
{
var desiredRow = TileViewAttachedProperties.GetRow(tile);
var desiredColumn = TileViewAttachedProperties.GetColumn(tile);
var desiredRowSpan = TileViewAttachedProperties.GetRowSpan(tile);
var desiredColumnSpan = TileViewAttachedProperties.GetColumnSpan(tile);
this.MarkCells(desiredRow, desiredColumn, desiredRowSpan, desiredColumnSpan, false);
}
this.MarkCells(row, column, rowSpan, columnSpan, true);
foreach (var tile in overlappingTiles)
{
var desiredRow = TileViewAttachedProperties.GetRow(tile);
var desiredColumn = TileViewAttachedProperties.GetColumn(tile);
var desiredRowSpan = TileViewAttachedProperties.GetRowSpan(tile);
var desiredColumnSpan = TileViewAttachedProperties.GetColumnSpan(tile);
this.FindEmptyFirstCell(desiredRow, desiredColumn, desiredRowSpan, desiredColumnSpan, new bool[this.RowsCount, this.ColumnsCount]);
var slot = this.freeSlot;
if (slot.Key != -1)
{
TileViewAttachedProperties.SetRow(tile, slot.Key);
TileViewAttachedProperties.SetColumn(tile, slot.Value);
this.MarkCells(slot.Key, slot.Value, desiredRowSpan, desiredColumnSpan, true);
}
this.freeSlot = new KeyValuePair <int, int>(-1, -1);
}
}