public async Task OnRecenter()
{
SVGControl.Xaxis = ActiveGraph.Nodes[0].Xaxis - (SVGControl.Width / 2);
SVGControl.Yaxis = ActiveGraph.Nodes[0].Yaxis - (SVGControl.Height / 2);
SVGControl.OldXaxis = SVGControl.Xaxis;
SVGControl.OldYaxis = SVGControl.Yaxis;
await SVGControlChanged.InvokeAsync(SVGControl);
}
protected override async Task OnAfterRenderAsync(bool firstRender)
{
var x = Math.Round(ZoomService.GetMaxScale() - (PercentageZoom / 100.0), 2);
if (SVGControl.Scale != x)
{
SVGControl.Scale = x;
await SVGControlChanged.InvokeAsync(SVGControl);
}
}
public async Task Fit()
{
SVGControl.Xaxis = Nodes.Min(n => n.Xaxis - n.Size);
SVGControl.Yaxis = Nodes.Min(n => n.Yaxis - n.Size) - 105;
SVGControl.OldXaxis = SVGControl.Xaxis;
SVGControl.OldYaxis = SVGControl.Yaxis;
var width = Nodes.Max(n => n.Xaxis + n.Size) - SVGControl.Xaxis;
var height = Nodes.Max(n => n.Yaxis + n.Size) - SVGControl.Yaxis + 30;
SVGControl.Scale = Math.Max(width / Browser.Width, height / Browser.Height);
await SVGControlChanged.InvokeAsync(SVGControl);
}
public async Task OnScroll(WheelEventArgs e)
{
if (e.DeltaY > 0)
{
if (ZoomService.ZoomOut(SVGControl))
{
await SVGControlChanged.InvokeAsync(SVGControl);
}
}
else if (e.DeltaY < 0)
{
if (ZoomService.ZoomIn(SVGControl))
{
await SVGControlChanged.InvokeAsync(SVGControl);
}
}
}
public async Task SelectionZoom(double i)
{
SVGControl.Scale = i;
await SVGControlChanged.InvokeAsync(SVGControl);
}
public async Task Select(MenuEventArgs <MenuItem> e)
{
switch (e.Item.Text)
{
case "Copy":
Copy();
break;
case "Paste":
await Paste();
break;
case "Left":
case "Center":
case "Right":
case "Top":
case "Middle":
case "Bottom":
NodeService.Align(ActiveGraph.Nodes, e.Item.Text);
break;
case "Delete":
await DeleteActive.InvokeAsync("all");
break;
case "Edit":
case "Nodes":
case "Edges":
await ChangeMenu.InvokeAsync(NavChoice.Design);
break;
case "All Nodes":
await Activate("nodes");
break;
case "All Edges":
await Activate("edges");
break;
case "Everything":
await Activate("all");
break;
case "Insert Edge":
await InsertEdge();
break;
case "Insert Node":
NodeService.AddNode(Graph.Nodes, Options.Default, origin[0] * SVGControl.Scale + SVGControl.Xaxis, origin[1] * SVGControl.Scale + SVGControl.Yaxis);
await GraphChanged.InvokeAsync(Graph);
break;
case "Stop Algorithm":
if (StartAlgorithm.Done)
{
StartAlgorithm.Clear = true;
}
else
{
await Reset();
}
break;
case "Zoom In":
if (ZoomService.ZoomIn(SVGControl))
{
await SVGControlChanged.InvokeAsync(SVGControl);
}
break;
case "Zoom Out":
if (ZoomService.ZoomOut(SVGControl))
{
await SVGControlChanged.InvokeAsync(SVGControl);
}
break;
}
}