//Adds a scale bar element to the layout and if there is already a map on the form we link it to the first one
private void _btnScaleBar_Click(object sender, EventArgs e)
{
LayoutScaleBar lsb = _layoutControl.CreateScaleBarElement() as LayoutScaleBar;
List <LayoutElement> mapElements = _layoutControl.LayoutElements.FindAll(delegate(LayoutElement o) { return(o is LayoutMap); });
if (mapElements.Count > 0)
{
lsb.Map = mapElements[0] as LayoutMap;
}
lsb.LayoutControl = _layoutControl;
_layoutControl.AddElementWithMouse(lsb);
}
/// <summary>
/// Edits a value based on some user input which is collected from a character control.
/// </summary>
/// <param name="context">Contains the scalebar and legend.</param>
/// <param name="provider">The service provider.</param>
/// <param name="value">The selected item.</param>
/// <returns>Returns the selected item.</returns>
public override object EditValue(ITypeDescriptorContext context, IServiceProvider provider, object value)
{
_dialogProvider = provider?.GetService(typeof(IWindowsFormsEditorService)) as IWindowsFormsEditorService;
if (context == null)
{
return(null);
}
LayoutScaleBar scaleBar = context.Instance as LayoutScaleBar;
LayoutLegend legend = context.Instance as LayoutLegend;
LayoutControl lc = null;
if (scaleBar?.LayoutControl != null)
{
lc = scaleBar.LayoutControl;
}
else if (legend?.LayoutControl != null)
{
lc = legend.LayoutControl;
}
ListBox lb = new();
if (lc == null)
{
return(null);
}
foreach (LayoutElement le in lc.LayoutElements.FindAll(o => o is LayoutMap))
{
lb.Items.Add(le);
}
lb.SelectedItem = value;
lb.SelectedValueChanged += LbSelectedValueChanged;
_dialogProvider?.DropDownControl(lb);
return(lb.SelectedItem);
}