/// <summary>
/// Creates a new instance the given <paramref name="from">source node</paramref>
/// and the possible target <paramref name="nodes"/>.
/// </summary>
/// <remarks>
/// Pressing the "Show Path" button will set the DialogResult.OK and close the dialog.
/// It is up to the caller to fetch the ToItem and get the shortest path.
/// </remarks>
/// <param name="from">The source node.</param>
/// <param name="nodes">The nodes to choose the target from.</param>
public ShortestPathDialog(INode from, List <INode> nodes)
{
From = from;
Nodes = nodes;
InitializeComponent();
toComboBox.DataSource = Nodes;
// render the From node in the canvasControl
var bounds = new RectD(0, 0, fromControl.Width, fromControl.Height);
var layout = new RectD(0, 0, 240, 80);
canvasControl.Size = new Size((int)bounds.Width, (int)bounds.Height);
canvasControl.HorizontalScrollBarPolicy = ScrollBarVisibility.Never;
canvasControl.VerticalScrollBarPolicy = ScrollBarVisibility.Never;
canvasControl.Graph.CreateNode(layout, from.Style, from.Tag);
canvasControl.ContentRect = bounds;
canvasControl.FitContent();
// render the canvasControl in a Bitmap
bitmap = new Bitmap(canvasControl.Size.Width, canvasControl.Size.Height, PixelFormat.Format32bppArgb);
using (Graphics g = Graphics.FromImage(bitmap)) {
g.SmoothingMode = SmoothingMode.HighQuality;
g.Clear(Color.Transparent);
ContextConfigurator cc = new ContextConfigurator(canvasControl.ContentRect);
var renderContext = cc.CreateRenderContext(canvasControl, g);
canvasControl.RenderContent(renderContext, g);
}
fromControl.Image = bitmap;
}
/// <summary>
/// Paint the style representation.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private static void styleListBox_DrawItem(object sender, DrawItemEventArgs e)
{
ListBox listBox = (ListBox)sender;
int i = e.Index;
e.DrawBackground();
INode node = listBox.Items[i] as INode;
var bounds = e.Bounds;
InsetsD insets = new InsetsD(2);
var canvasControl = new GraphControl();
canvasControl.Size = new Size(bounds.Width - (int)insets.HorizontalInsets,
bounds.Height - (int)insets.VerticalInsets);
Bitmap bm = new Bitmap(canvasControl.Size.Width, canvasControl.Size.Height);
Graphics g = Graphics.FromImage(bm);
canvasControl.HorizontalScrollBarPolicy = ScrollBarVisibility.Never;
canvasControl.VerticalScrollBarPolicy = ScrollBarVisibility.Never;
var dummyNode = canvasControl.Graph.CreateNode(node.Layout.ToRectD(), node.Style, node.Tag);
foreach (var label in node.Labels)
{
canvasControl.Graph.AddLabel(dummyNode, label.Text, label.LayoutParameter, label.Style, label.PreferredSize, label.Tag);
}
foreach (var port in node.Ports)
{
canvasControl.Graph.AddPort(dummyNode, port.LocationParameter, port.Style, port.Tag);
}
canvasControl.ContentRect = new RectD(0, 0, 70, 70);
canvasControl.FitContent();
e.DrawBackground();
g.SmoothingMode = SmoothingMode.HighQuality;
g.Clear(Color.White);
ContextConfigurator cc = new ContextConfigurator(canvasControl.ContentRect);
var renderContext = cc.CreateRenderContext(canvasControl, g);
canvasControl.RenderContent(renderContext, g);
var listGraphics = e.Graphics;
var oldClip = listGraphics.Clip;
listGraphics.IntersectClip(bounds);
listGraphics.Clear(listBox.BackColor);
listGraphics.DrawImage(bm, bounds.X + (int)insets.Left, bounds.Y + (int)insets.Top, bm.Width, bm.Height);
listGraphics.Clip = oldClip;
e.DrawFocusRectangle();
canvasControl.Dispose();
g.Dispose();
bm.Dispose();
}