void ISymbolCollectionRelocationHandler.PrepareForRelocation(SymbolCollection aCollection, uint aOldBase, uint aNewBase)
{
// This is invoked when a map file is activated. Because we've probably not yet read the
// source content, we will synchronously parse the map file now so that we have a full set
// of symbols available to the client.
if (aCollection.IsEmptyApartFromDefaultSymbol)
{
// This will read into the original map source and original map collection.
iOriginalMapSource.Read(TSynchronicity.ESynchronous);
// If the specified aCollection is a clone, i.e. not the original, then we may need
// to copy symbols over.
if (iOriginalMapSource.Count > 0)
{
SymbolCollection primaryMapCollection = iOriginalMapSource[0];
if (aCollection != primaryMapCollection)
{
aCollection.Clone(primaryMapCollection);
}
}
}
}
public void DrawPreview()
{
using (System.Drawing.Graphics gr = System.Drawing.Graphics.FromHwnd(panelPreview.Handle))
{
Rectangle rect = new Rectangle(0, 0, panelPreview.Width, panelPreview.Height);
using (SolidBrush brush = new SolidBrush(Color.White))
{
gr.FillRectangle(brush, rect);
}
if (GraphicsEngine.Current.Engine != null)
{
using (var bitmap = GraphicsEngine.Current.Engine.CreateBitmap(rect.Width, rect.Height))
using (var canvas = bitmap.CreateCanvas())
{
new SymbolPreview(null).Draw(canvas, rect.ToCanvasRectangle(), _symbol?.Clone(null) as ISymbol, false);
gr.DrawImage(bitmap.ToGdiBitmap(), new Point(rect.X, rect.Y));
}
}
using (Pen pen = new Pen(Color.Gray, 0))
{
pen.DashStyle = System.Drawing.Drawing2D.DashStyle.Dot;
gr.DrawLine(pen, 0, rect.Height / 2, rect.Width, rect.Height / 2);
gr.DrawLine(pen, rect.Width / 2, 0, rect.Width / 2, rect.Height);
}
}
}
