public override object EditValue(System.ComponentModel.ITypeDescriptorContext context, IServiceProvider provider, object value)
{
if (context != null && context.Instance != null && provider != null)
{
ParameterValue pv = context.Instance as ParameterValue;
if (pv == null)
{
MapItem item = context.Instance as MapItem;
if (item != null)
{
pv = item.Item.Value as ParameterValue;
}
}
if (pv == null)
{
pv = value as ParameterValue;
}
if (pv != null)
{
IWindowsFormsEditorService edSvc = (IWindowsFormsEditorService)provider.GetService(typeof(IWindowsFormsEditorService));
if (edSvc != null)
{
IMathExpression mew = value as IMathExpression;
if (mew == null)
{
mew = pv.MathExpression;
if (mew == null)
{
MathNodeRoot r = new MathNodeRoot();
r.Name = pv.Name;
mew = r;
}
}
System.Drawing.Point curPoint = System.Windows.Forms.Cursor.Position;
rc.X = curPoint.X;
rc.Y = curPoint.Y;
IMathEditor dlg = mew.CreateEditor(rc);
//
MathPropertyGrid pg = null;
Type t = edSvc.GetType();
PropertyInfo pif0 = t.GetProperty("OwnerGrid");
if (pif0 != null)
{
object g = pif0.GetValue(edSvc, null);
pg = g as MathPropertyGrid;
}
IMethod imScope = pv.ScopeMethod;
if (imScope == null)
{
imScope = mew.ScopeMethod;
if (imScope == null)
{
if (pg != null)
{
imScope = pg.ScopeMethod;
}
}
}
//
dlg.ActionContext = pv.ActionContext;
dlg.SetScopeMethod(imScope);
dlg.VariableMapTargetType = typeof(ParameterValue);
dlg.MathExpression = (IMathExpression)mew.Clone();
dlg.MathExpression.ScopeMethod = imScope;
dlg.MathExpression.EnableUndo = true;
if (edSvc.ShowDialog((Form)dlg) == DialogResult.OK)
{
mew = dlg.MathExpression;
if (value != pv)
{
value = mew;
pv.SetValue(value);
}
else
{
pv.SetValue(mew);
}
if (pg != null)
{
pg.OnValueChanged(mew, EventArgs.Empty);
}
}
}
}
}
return(value);
}
