public async void CreateMinimap()
{
await Task.Delay(300);
var brushes = new Brush[]
{
Brushes.RoyalBlue,
Brushes.Coral,
Brushes.Crimson,
Brushes.HotPink,
Brushes.LimeGreen,
Brushes.BlueViolet,
};
int index = 0;
Brush get_random_brush()
{
return(brushes[(index++) % brushes.Length]);
}
var timer = new DispatcherTimer();
var canvas = new Canvas()
{
Background = Brushes.Gray,
Opacity = 0.8,
};
Console.WriteLine(canvas.Width);
Dictionary <INodeControl, Border> map = new Dictionary <INodeControl, Border>();
var nodesControl = NetworkView.FindChild <NodeItemsControl>();
var scrollViewer = this.FindChild <InfiniteScrollViewer>();
var visualBrush = new VisualBrush();
MiniMap.Background = visualBrush;
var thumb = new Thumb()
{
Width = ActualWidth * scrollViewer.Scale,
Height = ActualHeight * scrollViewer.Scale,
Background = Brushes.RoyalBlue,
Opacity = 0.5,
BorderBrush = Brushes.Yellow,
BorderThickness = new Thickness(2)
};
Point start;
Point translate;
thumb.PreviewMouseDown += (s, e) =>
{
start = e.GetPosition(scrollViewer);
translate = scrollViewer.GetTranslateToPosition();
update_thumb(thumb, scrollViewer);
};
thumb.DragDelta += (s, e) =>
{
var rect = NetworkView.ItemsRect.ValidateRect(ActualWidth, ActualHeight)
.ToOffset(scrollViewer.ViewRectOffset);
var p = Mouse.GetPosition(scrollViewer) - start;
var x = e.HorizontalChange * (rect.Width / MiniMap.Width);
var y = e.VerticalChange * (rect.Height / MiniMap.Height);
x = MathExtensions.Clamp(x, rect.Left, rect.Right);
y = MathExtensions.Clamp(y, rect.Left, rect.Right);
scrollViewer.TranslateX(-x);
scrollViewer.TranslateY(-y);
update_thumb(thumb, scrollViewer);
};
MiniMap.Children.Add(thumb);
timer.Interval = TimeSpan.FromMilliseconds(30);
timer.Tick += (s, e) =>
{
var rect = NetworkView.ItemsRect.ValidateRect(ActualWidth, ActualHeight).ToOffset(scrollViewer.ViewRectOffset);
var point = scrollViewer.TransformPoint(0, 0);
thumb.Width = ActualWidth * (1.0 / scrollViewer.Scale);
thumb.Height = ActualHeight * (1.0 / scrollViewer.Scale);
thumb.Width = MiniMap.Width * (thumb.Width / rect.Width);
thumb.Height = MiniMap.Height * (thumb.Height / rect.Height);
Canvas.SetLeft(thumb, point.X / (rect.Width / MiniMap.Width));
Canvas.SetTop(thumb, point.Y / (rect.Height / MiniMap.Height));
canvas.Width = rect.Width;
canvas.Height = rect.Height;
foreach (var node in nodesControl.GetNodes())
{
if (map.ContainsKey(node) is false)
{
map[node] = new Border()
{
Width = node.ActualWidth * (rect.Width / rect.Height),
Height = node.ActualHeight * (rect.Width / rect.Height),
Background = get_random_brush()
};
}
if (canvas.Children.Contains(map[node]) is false)
{
canvas.Children.Add(map[node]);
}
var converted_x = node.X - rect.Left;
Canvas.SetLeft(map[node], converted_x);
Canvas.SetTop(map[node], node.Y - rect.Top);
}
foreach (var key_value in map)
{
if (nodesControl.Items.Contains(key_value.Key.DataContext) is false)
{
canvas.Children.Remove(key_value.Value);
}
}
visualBrush.Visual = canvas;
};
timer.Start();
}
public ViewportDrag(NetworkView networkView, MouseEventArgs mouseEventArgs)
{
PrevPosition = mouseEventArgs.GetPosition(networkView);
NetworkView = networkView;
_scrollViewer = NetworkView.FindChild <InfiniteScrollViewer>(x => true);
}
public ViewportDragController(NetworkView networkView)
{
NetworkView = networkView;
_scrollViewer = NetworkView.FindChild <InfiniteScrollViewer>(x => true);
}