public PhotoPuzzlePage4(ImageSource[] imageSources)
{
InitializeComponent();
// Loop through the rows and columns.
for (int row = 0; row < NUM; row++)
{
for (int col = 0; col < NUM; col++)
{
// But skip the last one!
if (row == NUM - 1 && col == NUM - 1)
{
break;
}
// Get the bitmap for each tile and instantiate it.
ImageSource imageSource = imageSources[NUM * row + col];
PhotoPuzzleTile tile = new PhotoPuzzleTile(row, col, imageSource);
// Add tap recognition.
TapGestureRecognizer tapGestureRecognizer = new TapGestureRecognizer
{
Command = new Command(OnTileTapped),
CommandParameter = tile
};
tile.GestureRecognizers.Add(tapGestureRecognizer);
// Add it to the array and the AbsoluteLayout.
tiles[row, col] = tile;
absoluteLayout.Children.Add(tile);
}
}
}
void OnContentViewSizeChanged(object sender, EventArgs args)
{
ContentView contentView = (ContentView)sender;
double width = contentView.Width;
double height = contentView.Height;
if (width <= 0 || height <= 0)
{
return;
}
// Orient StackLayout based on portrait/landscape mode.
stackLayout.Orientation = (width < height) ? StackOrientation.Vertical :
StackOrientation.Horizontal;
// Calculate tile size and position based on ContentView size.
tileSize = Math.Min(width, height) / NUM;
absoluteLayout.WidthRequest = NUM * tileSize;
absoluteLayout.HeightRequest = NUM * tileSize;
foreach (View view in absoluteLayout.Children)
{
PhotoPuzzleTile tile = (PhotoPuzzleTile)view;
// Set tile bounds.
AbsoluteLayout.SetLayoutBounds(tile, new Rectangle(tile.Col * tileSize,
tile.Row * tileSize,
tileSize,
tileSize));
}
}
async Task AnimateTile(int row, int col, int newRow, int newCol, uint length)
{
// The tile to be animated.
PhotoPuzzleTile animaTile = tiles[row, col];
// The destination rectangle.
Rectangle rect = new Rectangle(emptyCol * tileSize,
emptyRow * tileSize,
tileSize,
tileSize);
// Animate it!
await animaTile.LayoutTo(rect, length);
// Set layout bounds to same Rectangle.
AbsoluteLayout.SetLayoutBounds(animaTile, rect);
// Set several variables and properties for new layout.
tiles[newRow, newCol] = animaTile;
animaTile.Row = newRow;
animaTile.Col = newCol;
tiles[row, col] = null;
emptyRow = row;
emptyCol = col;
}
async void OnTileTapped(object parameter)
{
if (isBusy)
{
return;
}
isBusy = true;
PhotoPuzzleTile tappedTile = (PhotoPuzzleTile)parameter;
await ShiftIntoEmpty(tappedTile.Row, tappedTile.Col);
isBusy = false;
}