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| namespace WpfApplication1
{
/// <summary>
/// Logique d'interaction pour MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
private Random rnd = new Random();
private List<Shape> shapes = new List<Shape>();
private Ellipse ellipEraser = new Ellipse();
public MainWindow()
{
InitializeComponent();
this.Loaded += new RoutedEventHandler(MainWindow_Loaded);
}
void MainWindow_Loaded(object sender, RoutedEventArgs e)
{
FillCanvas();// populate (peuplement du canvas avec quelques rectangles de test)
// ajout de la gomme au canvas
UpdateShapes();
}
private void FillCanvas()
{
for (int i = 1; i < 21; i++)
{
Shape rect = new Rectangle();
SetShape(rect,new Point(),false);
shapes.Add(rect);
UpdateShapes();
}
}
private void SetShape(Shape shp, Point ptClicked, bool IsInteractive)
{
if (!IsInteractive)
{
double x, y;
shp.Fill = Brushes.Yellow;
shp.Stroke = Brushes.Red;
shp.Width = 10;
shp.Height = 5;
x = rnd.Next(5, 350);
y = rnd.Next(10, 250);
Canvas.SetLeft(shp, x);
Canvas.SetTop(shp, y);
}
else
{
double x, y;
shp.Fill = Brushes.Yellow;
shp.Stroke = Brushes.Red;
shp.Width = 10;
shp.Height = 5;
x = ptClicked.X;
y = ptClicked.Y;
Canvas.SetLeft(shp, x);
Canvas.SetTop(shp, y);
}
}
private void SetEraserShape(Ellipse shpEllip)
{
double x, y;
shpEllip.Fill = Brushes.Magenta;
shpEllip.Stroke = Brushes.Black;
shpEllip.Width = 12;
shpEllip.Height = 8;
shpEllip.Visibility = Visibility.Collapsed;
x = -12;
y = -8;
Canvas.SetLeft(shpEllip, x);
Canvas.SetTop(shpEllip, y);
}
// handlers mouse
private void chart_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
Point pointClicked = e.GetPosition(chart);
if (cmdAdd.IsChecked == true)
{
Shape shape = new Rectangle();
SetShape(shape, pointClicked, true);
Canvas.SetLeft(shape, pointClicked.X);
Canvas.SetTop(shape, pointClicked.Y);
shapes.Add(shape);
UpdateShapes();
}
}
private void chart_MouseMove(object sender, MouseEventArgs e)
{
Point pointClicked = e.GetPosition(chart);
Canvas.SetLeft(ellipEraser, pointClicked.X);
Canvas.SetTop(ellipEraser, pointClicked.Y);
if (cmdEraser.IsChecked == true)
{
ellipEraser.Visibility = Visibility.Visible;
//Rectangle currentShape = GetRectangle(pointClicked);
Rectangle currentShape = GetRectangle();
if (currentShape != null)
{
shapes.Remove(currentShape);
UpdateShapes();
}
}
else if (cmdQuitEraser.IsChecked == true)
{
Canvas.SetLeft(ellipEraser, -12);
Canvas.SetTop(ellipEraser, -8);
ellipEraser.Visibility = Visibility.Collapsed;
UpdateShapes();
}
}
private void chart_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
//if (cmdQuitEraser.IsChecked == true)
//{
// Canvas.SetLeft(ellipEraser, -12);
// Canvas.SetTop(ellipEraser, -8);
// ellipEraser.Visibility = Visibility.Collapsed;
// UpdateShapes();
//}
}
private void UpdateShapes()
{
chart.Children.Clear();
// ajout de la gomme au canvas
ellipEraser = new Ellipse();
SetEraserShape(ellipEraser);
chart.Children.Add(ellipEraser);
foreach (var item in shapes)
{
chart.Children.Add(item);
}
}
// obtient le rectangle "intersectionnel" avec la gomme
private Rectangle GetRectangle()
{
Shape shapeIntersected = null;
Point eraserP1 = new Point(Canvas.GetLeft(ellipEraser), Canvas.GetTop(ellipEraser));
Point eraserP2 = new Point(eraserP1.X + ellipEraser.Width, eraserP1.Y + ellipEraser.Height);
Rect rcEraser = new Rect(eraserP1, eraserP2);
foreach (Shape item in shapes)
{
Point itemP1 = new Point(Canvas.GetLeft(item), Canvas.GetTop(item));
Point itemP2 = new Point(itemP1.X + item.Width, itemP1.Y + item.Height);
Rect rcItem = new Rect(itemP1, itemP2);
lblrect.Content = rcItem.ToString();
if (rcItem.IntersectsWith(rcEraser ))
{
shapeIntersected = item;
break;
}
}
return (Rectangle)shapeIntersected;
}
}
} |
