Create 2-dimensional contour plot from unstructured 3-dimensional data.  Means the points are randomly arranged in the XY plane.

Attached file shows an example of what I would like to achieve.  I think the contour plot Telerik does currently requires a structured grid, i.e. full grid of NxM points.

An exception is thrown when you try to update the items source of RadTreeListView in an async method.

The following error is observed.
InvalidOperationException: The calling thread cannot access this object because a different thread owns it

To work this around ensure that only the main UI thread updates the item source.

Hi

I would like to know if Progress Telerik has some plan to port their WPF controls to Avalonia (avaloniaui.net).

Thanks

Laurent

The display text (the text displayed when the controls is not focused) doesn't match the FormatString on startup of RadMaskedNumericInput. This happens if the FormatString is "00" and the initial value is set to 0. In this case, the initially displayed text is "0", instead of the expected "00". When you focus the masked input control and then lost the focus, the correct display text is shown.

To workaround this, you can override the CoerceDisplayTextOverride method of RadMaskedNumericInput and replace the returned value in case it is "0".

public class CustomMaskedNumericInput : RadMaskedNumericInput
{
	protected override string CoerceDisplayTextOverride()
	{
		var txt = base.CoerceDisplayTextOverride();
		if (txt == "\00")
		{
			txt = "00";
		}
		return txt;
	}
}

From the PDF Specification: "An ink annotation represents a freehand “scribble” composed of one or more disjoint paths. When opened, it displays a pop-up window containing the text of the associated note."

Sometimes the Ink annotations are imported as UnsupportedAnnotation and not displayed as expected. In such cases, the annotations could be removed from the RadFixedPage content in the following manner:

foreach (RadFixedPage page in document.Pages)
{
	List<Annotation> inkAnnotations = page.Annotations.Where(a => a.Type == AnnotationType.Ink).ToList();
	foreach (Annotation inkAnnotation in inkAnnotations)
	{
		page.Annotations.Remove(inkAnnotation);
	}
}

Can be reproduced in the WPF demo (Windows8 theme): the error description tooltip appears on the left of the control and with the red arrow on the left (see attachment). The tooltip should appear on the same side of the red adorned element (the red triangle, top right corner) and the tooltip arrow should point the control.

To work this around, you can disable the default behavior that happens on right click and then implement custom one from scratch. To do so, you can use the PreviewKeyDown event of RadVirtualGrid.

private void VirtualGrid_PreviewKeyDown(object sender, System.Windows.Input.KeyEventArgs e)
{
	var virtualGrid = (RadVirtualGrid)sender;
	if (e.Key == System.Windows.Input.Key.Right)
	{
		var currentCell = virtualGrid.CurrentCellInfo;
		var newCellIndex = Math.Min(currentCell.ColumnIndex + 1, virtualGrid.InitialColumnCount - 1);
		var nextCell = new VirtualGridCellInfo(currentCell.RowIndex, newCellIndex, vg);
		virtualGrid.CurrentCellInfo = nextCell;
		virtualGrid.SelectedCells.Clear();                
		virtualGrid.SelectedCells.Add(nextCell);

		var viewportWidth = this.panel.ViewportWidth - virtualGrid.RowHeaderWidth;
		var newCellX = (virtualGrid.ColumnWidth * nextCell.ColumnIndex) - this.panel.HorizontalOffset;
		if (newCellX >= viewportWidth)
		{
			var delta = virtualGrid.ColumnWidth + (newCellX - viewportWidth);
			this.panel.SetHorizontalOffset(this.panel.HorizontalOffset + delta);
		}
		e.Handled = true;
	}
}

private VirtualGridCompoundPanel panel;

private void VirtualGrid_Loaded(object sender, RoutedEventArgs e)
{
	var virtualGrid = (RadVirtualGrid)sender;
	this.panel = virtualGrid.FindChildByType<VirtualGridCompoundPanel>();            
}

If you press Ctrl+Up/Down to change the selection and currency in TreeListView, the CurrentCellChanged event is fired. However, the e.NewCell property of the event arguments is null.

To get the new cell, use the CurrentCellInfo property of RadTreeListView.

private void RadTreeListView_CurrentCellChanged(object sender, GridViewCurrentCellChangedEventArgs e)
{
	var treeListView = (RadTreeListView)sender;
	GridViewCellInfo currentCell = treeListView.CurrentCellInfo;
}

The EqualToRule does not work the same way in Excel and RadSpreasheet. 

When using string values with this rule, Excel requires using quotes while in RadSpreadsheet the quotes are interpreted as part of the value.