public MainWindow()
{
InitializeComponent();
grid = Graph;// new VirtualCanvas();
grid.SmallScrollIncrement = new Size(_tileWidth + _tileMargin, _tileHeight + _tileMargin);
//Scroller.Content = grid;
object v = Scroller.GetValue(ScrollViewer.CanContentScrollProperty);
Canvas target = grid.ContentCanvas;
zoom = new MapZoom(target);
pan = new Pan(target, zoom);
rectZoom = new RectangleSelectionGesture(target, zoom, ModifierKeys.Control);
rectZoom.ZoomSelection = true;
autoScroll = new AutoScroll(target, zoom);
zoom.ZoomChanged += new EventHandler(OnZoomChanged);
grid.VisualsChanged += new EventHandler <VisualChangeEventArgs>(OnVisualsChanged);
ZoomSlider.ValueChanged += new RoutedPropertyChangedEventHandler <double>(OnZoomSliderValueChanged);
grid.Scale.Changed += new EventHandler(OnScaleChanged);
grid.Translate.Changed += new EventHandler(OnScaleChanged);
grid.Background = new SolidColorBrush(Color.FromRgb(0xd0, 0xd0, 0xd0));
grid.ContentCanvas.Background = Brushes.White;
AllocateNodes();
}
public Size MeasureText(VirtualCanvas parent, string label)
{
if (_parent != parent)
{
FontFamily fontFamily = (FontFamily)parent.GetValue(TextBlock.FontFamilyProperty);
FontStyle fontStyle = (FontStyle)parent.GetValue(TextBlock.FontStyleProperty);
FontWeight fontWeight = (FontWeight)parent.GetValue(TextBlock.FontWeightProperty);
FontStretch fontStretch = (FontStretch)parent.GetValue(TextBlock.FontStretchProperty);
_fontSize = (double)parent.GetValue(TextBlock.FontSizeProperty);
_typeface = new Typeface(fontFamily, fontStyle, fontWeight, fontStretch);
_parent = parent;
}
FormattedText ft = new FormattedText(label, CultureInfo.CurrentUICulture,
FlowDirection.LeftToRight, _typeface, _fontSize, Brushes.Black);
return(new Size(ft.Width, ft.Height));
}
public UIElement CreateVisual(VirtualCanvas parent)
{
if (_visual == null)
{
switch (_shape)
{
case TestShapeType.Curve:
{
PathGeometry g = new PathGeometry();
PathFigure f = new PathFigure();
f.StartPoint = _points[0];
g.Figures.Add(f);
for (int i = 0, n = _points.Length; i < n; i += 3)
{
BezierSegment s = new BezierSegment(_points[i], _points[i + 1], _points[i + 2], true);
f.Segments.Add(s);
}
Path p = new Path();
p.Data = g;
p.Stroke = Stroke;
p.StrokeThickness = 2;
//DropShadowBitmapEffect effect = new DropShadowBitmapEffect();
//effect.Opacity = 0.8;
//effect.ShadowDepth = 3;
//effect.Direction = 270;
//c.BitmapEffect = effect;
_visual = p;
break;
}
case TestShapeType.Ellipse:
{
Canvas c = new Canvas();
Ellipse e = new Ellipse();
c.Width = e.Width = _bounds.Width;
c.Height = e.Height = _bounds.Height;
c.Children.Add(e);
Size s = MeasureText(parent, Label);
double x = (_bounds.Width - s.Width) / 2;
double y = (_bounds.Height - s.Height) / 2;
TextBlock text = new TextBlock();
text.Text = Label;
Canvas.SetLeft(text, x);
Canvas.SetTop(text, y);
c.Children.Add(text);
e.StrokeThickness = 2;
e.Stroke = Stroke;
e.Fill = Fill;
//DropShadowBitmapEffect effect = new DropShadowBitmapEffect();
//effect.Opacity = 0.8;
//effect.ShadowDepth = 3;
//effect.Direction = 270;
//c.BitmapEffect = effect;
_visual = c;
break;
}
case TestShapeType.Rectangle:
{
Border b = new Border();
b.CornerRadius = new CornerRadius(3);
b.Width = _bounds.Width;
b.Height = _bounds.Height;
TextBlock text = new TextBlock();
text.Text = Label;
text.VerticalAlignment = VerticalAlignment.Center;
text.HorizontalAlignment = HorizontalAlignment.Center;
b.Child = text;
b.Background = Fill;
//DropShadowBitmapEffect effect = new DropShadowBitmapEffect();
//effect.Opacity = 0.8;
//effect.ShadowDepth = 3;
//effect.Direction = 270;
//b.BitmapEffect = effect;
_visual = b;
break;
}
}
}
return(_visual);
}
