protected override void OnPaintAdornments(PaintEventArgs pe)
{
base.OnPaintAdornments(pe);
if (Control != null)
{
FieldContextControl ctl = Control as FieldContextControl;
if (ctl != null)
{
string str;
Brush brsh = Brushes.Red;
if (ctl.AttachToField != null)
{
str = "->Field(" + ctl.AttachToField.FieldName + ")";
}
else
{
if (ctl.Record != null)
{
str = ctl.Record.RecordName;
}
else
{
str = "?";
}
str += ".[\"" + ctl.AttachToFieldName + "\"]";
if (ctl.AttachToParentRecord)
{
brsh = Brushes.Navy;
str = "≈>" + str;
}
}
using (Font f = new Font("Tahoma", 6, FontStyle.Bold))
using (Brush backBrush =
new LinearGradientBrush(new Rectangle(0, 0, 100, 14),
Color.FromArgb(0x80, Color.White),
Color.FromArgb(10, Color.Orange), 90))
Utils.DrawStringWithBackground(pe.Graphics, str, f, brsh, backBrush, 0, 0);
}//context!=null
}
}
private void doComponentRemoving(object sender, ComponentEventArgs e)
{
if (e.Component is ModelBase)
{
FieldContextControl ctl = Control as FieldContextControl;
if (ctl != null)
{
if (e.Component == ctl.AttachToRecord)
{
ctl.AttachToRecord = null;
}
else
if (e.Component == ctl.AttachToField)
{
ctl.AttachToField = null;
}
}
}
}
public override object EditValue(ITypeDescriptorContext context,
IServiceProvider provider, object value)
{
editorService = provider.GetService(typeof(IWindowsFormsEditorService)) as IWindowsFormsEditorService;
if (editorService == null)
{
return(value);
}
FieldContextControl control = context.Instance as FieldContextControl;
ListBox aListBox = new ListBox();
IEnumerable <string> fieldNames = null;
if (control != null)
{
if (control.Record != null)
{
fieldNames = control.Record.Fields.Select <Field, string>(item => item.FieldName);
}
else
if (control.AttachToRecord != null)
{
fieldNames = control.AttachToRecord.Fields.Select <Field, string>(item => item.FieldName);
}
else
{
Record rec = Utils.FindParentRecord(control); //try to get from parent
if (rec == null) //try to create surrogate
{
string typeName = Utils.FindParentRecordSurrogateTypeName(control);
if (typeName != null)
{
using (DesignerRecordBinding b = new DesignerRecordBinding(control))
try
{
b.AttachDesignTimeSurrogateRecord(typeName);
if (b.Record == null)
{
throw new WFormsException("Could not create surrogate record class");
}
fieldNames = b.Record.Fields.Select <Field, string>(item => item.FieldName);
}
catch (Exception error)
{
MessageBox.Show(
string.Format(string.Format(StringConsts.SURROGATE_CREATE_ERROR, typeName, error.Message),
"Field Lookup Designer"
));
}
}
}
else
{
fieldNames = rec.Fields.Select <Field, string>(item => item.FieldName);
}
}
}
int itemIdx = 0;
if (fieldNames != null)
{
foreach (string s in fieldNames)
{
aListBox.Items.Add(s);
if ((control != null) && (control.AttachToFieldName == s))
{
aListBox.SelectedIndex = itemIdx;
}
itemIdx++;
}
}
else
{
aListBox.Items.Add(string.Empty);
aListBox.SelectedIndex = 0;
}
aListBox.SelectedIndexChanged +=
new EventHandler(ItemSelected);
editorService.DropDownControl(aListBox);
if (aListBox.SelectedItem != null)
{
return(aListBox.SelectedItem.ToString());
}
else
{
return(string.Empty);
}
}
