internal void FinalRefreshAfterUpdate()
{
UpdateBackgroundGrid();
PlaceWordStatus status = RecolorizeAllWords();
viewModel.UpdateStatus(status);
}
private void RecolorizeWord(WordAndCanvas wac, PlaceWordStatus status)
{
bool isInSelection = m_Sel.WordAndCanvasList?.Contains(wac) ?? false;
switch (status)
{
case PlaceWordStatus.Valid:
if (isInSelection)
{
wac.WordCanvas.SetColor(SelectedValidForeground, SelectedValidBackground);
}
else
{
wac.WordCanvas.SetColor(NormalValidForeground, NormalValidBackground);
}
break;
case PlaceWordStatus.TooClose:
if (isInSelection)
{
wac.WordCanvas.SetColor(SelectedTooCloseForeground, SelectedTooCloseBackground);
}
else
{
wac.WordCanvas.SetColor(NormalTooCloseForeground, NormalTooCloseBackground);
}
break;
case PlaceWordStatus.Invalid:
if (isInSelection)
{
wac.WordCanvas.SetColor(SelectedInvalidForeground, SelectedInvalidBackground);
}
else
{
wac.WordCanvas.SetColor(NormalInvalidForeground, NormalInvalidBackground);
}
break;
default:
throw new ArgumentOutOfRangeException(nameof(status), status, null);
}
}
internal PlaceWordStatus RecolorizeWordAndCanvasList(List <WordAndCanvas> wordAndCanvasList)
{
PlaceWordStatus result = PlaceWordStatus.Valid;
foreach (WordAndCanvas wac in wordAndCanvasList)
{
var layout = viewModel.GetLayoutExcludingWordPosition(wac.WordPosition);
PlaceWordStatus status = EditorViewModel.CanPlaceWordInLayout(layout, wac);
RecolorizeWord(wac, status);
if (status == PlaceWordStatus.TooClose && result == PlaceWordStatus.Valid)
{
result = PlaceWordStatus.TooClose;
}
else if (status == PlaceWordStatus.Invalid && result != PlaceWordStatus.Invalid)
{
result = PlaceWordStatus.Invalid;
}
}
return(result);
}
// Separate from MainGrid_MouseDown to reduce complexity
private Action <Point> GetMouseDownMoveAction()
{
// Need a layout without moved word to validate placement
m_FixedLayout = viewModel.GetLayoutExcludingWordPositionList(m_Sel.WordAndCanvasList.Select(wac => wac.WordPosition));
// Reverse-transform mouse Grid coordinates into DrawingCanvas coordinates
Matrix m = MainMatrixTransform.Matrix;
m.Invert(); // To convert from screen transformed coordinates into ideal grid
// coordinates starting at (0,0) with a square side of UnitSize
List <Vector> clickOffsetList = new List <Vector>(m_Sel.WordAndCanvasList.Count);
clickOffsetList.AddRange(m_Sel.WordAndCanvasList
.Select(wac => new Point((double)wac.WordCanvas.GetValue(Canvas.LeftProperty), (double)wac.WordCanvas.GetValue(Canvas.TopProperty)))
.Select(canvasTopLeft => canvasTopLeft - m.Transform(previousMousePosition)));
// When moving, point is current mouse in ideal grid coordinates
return(point =>
{
// Just move selected WordCanvas
for (int i = 0; i < m_Sel.WordAndCanvasList.Count; i++)
{
double preciseTop = point.Y + clickOffsetList[i].Y;
double preciseLeft = point.X + clickOffsetList[i].X;
WordCanvas wc = m_Sel.WordAndCanvasList[i].WordCanvas;
wc.SetValue(Canvas.TopProperty, preciseTop);
wc.SetValue(Canvas.LeftProperty, preciseLeft);
// Round position to closest square on the grid
int top = (int)Math.Floor(preciseTop / UnitSize + 0.5);
int left = (int)Math.Floor(preciseLeft / UnitSize + 0.5);
PlaceWordStatus status = EditorViewModel.CanPlaceWordAtPositionInLayout(m_FixedLayout, m_Sel.WordAndCanvasList[i].WordPosition, new PositionOrientation(top, left, m_Sel.WordAndCanvasList[i].WordPosition.IsVertical));
RecolorizeWord(m_Sel.WordAndCanvasList[i], status);
}
});
}
// Helper to reduce cyclomatic complexity
private PlaceWordStatus CanPlaceHorizontalWord(WordPosition wordPosition, bool withTooClose)
{
PlaceWordStatus result = PlaceWordStatus.Valid;
int row = wordPosition.StartRow;
int column = wordPosition.StartColumn;
// Free cell left
if (IsOccupiedSquare(row, column - 1))
{
if (withTooClose)
{
result = PlaceWordStatus.TooClose;
}
else
{
return(PlaceWordStatus.Invalid);
}
}
// Free cell right
if (IsOccupiedSquare(row, column + wordPosition.Word.Length))
{
if (withTooClose)
{
result = PlaceWordStatus.TooClose;
}
else
{
return(PlaceWordStatus.Invalid);
}
}
for (int i = 0; i < wordPosition.Word.Length; i++)
{
char l = GetLetter(row, column + i);
if (l == wordPosition.Word[i])
{
// It's OK to already have a matching letter only if it only belongs to a crossing word (of opposite direction)
foreach (WordPosition loop in GetWordPositionsFromSquare(row, column + i))
{
if (loop.IsVertical == wordPosition.IsVertical)
{
return(PlaceWordStatus.Invalid);
}
}
}
else
{
// We need an empty cell for this letter
if (l != '\0')
{
return(PlaceWordStatus.Invalid);
}
// We need a free cell above and below, or else we're too close
if (IsOccupiedSquare(row - 1, column + i) || IsOccupiedSquare(row + 1, column + i))
{
if (withTooClose)
{
result = PlaceWordStatus.TooClose;
}
else
{
return(PlaceWordStatus.Invalid);
}
}
}
}
return(result);
}