private void tilesetsViewModel_PropertyChanged(object sender, PropertyChangedEventArgs e)
{
if (e.PropertyName == "Selected")
{
// WARNING: see TilesetsViewModel.cs - Selected property.
BrushBucket brushBucket = editor.GetBrushBucketForSelectedTileset();
if (brushBucket != null)
{
// Generate view models, set selected.
brushes = new ObservableCollection <BrushViewModel>(brushBucket.Brushes.Select(b => new BrushViewModel(b)));
selected = brushes.FirstOrDefault(b => b.WrapsBrush(brushBucket.SelectedBrush));
}
else
{
// Clear data.
brushes = null;
selected = null;
}
if (PropertyChanged != null)
{
// Notify users.
PropertyChanged(this, new PropertyChangedEventArgs("Brushes"));
PropertyChanged(this, new PropertyChangedEventArgs("Selected"));
}
}
}
private void sheetCanvas_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
// Check if there is brush selected and tile set selected.
if (tilesetsViewModel.Selected == null)
{
return;
}
if (brushesViewModel.Selected == null)
{
return;
}
// Get mouse position
System.Windows.Point position = Mouse.GetPosition(gridBorder);
int positionX = (int)position.X / tilesetsViewModel.Selected.TileWidth;
int positionY = (int)position.Y / tilesetsViewModel.Selected.TileHeight;
// Get bucket.
BrushBucket brushBucket = editor.GetBrushBucketForSelectedTileset();
// Keep selected brush in bounds.
TileBrush brush = brushBucket.SelectedBrush;
if (positionX + brush.DisplayWidth > tilesetsViewModel.Selected.Columns)
{
positionX = tilesetsViewModel.Selected.Columns - brush.DisplayWidth;
}
if (positionY + brush.DisplayHeight > tilesetsViewModel.Selected.Rows)
{
positionY = tilesetsViewModel.Selected.Rows - brush.DisplayHeight;
}
// Select wanted index.
brush.SelectIndex(positionX, positionY);
// Reconstruct selection grid.
ReconstructSelectionGrid();
}