We use a RadDiagram for what is essentially graphic-art layout.  At times, subpixel positioning and extents really are correct for this use case.  We have shapes correctly positioned and displaying at subpixel accuracy; however, the selection outline always snaps to a pixel.

This is particularly relevant when zoomed in on a piece of art, e.g., aligning semi-transparent edges.  It looks odd to have the selection outline lie outside of the visible extents of the art.  Furthermore, when moving the art by mouse, the interaction is odd in that the art appears to move smoothly while the selection outline pops from pixel to pixel.  This confused our users as to what was really happening as they positioned things.

The relevant code for this is in RadDiagram.UpdateManipulationAdorner, which uses Math.Floor and Math.Ceiling to snap the line to pixel borders.  This was apparently put in to solve issues of blurriness from having a, say, 1-pixel selection outline lie at a sub-pixel position.  Perhaps a dependency property to control whether this snapping happens?

If you have two nested containers and a shape inside the inner container a wrong connector will be activated if you try to create connection (target) to the shape. This can be reproduced with the MVVM SDK example. Try to connect the "Polo" shape to the "Bugatti" shape. The auto connector of the "Bugatti" shape will not be activated when the endpoint of the connection is inside the shape. It will be activated only if you directly hover over the connector.

When you start resize operation on a grouped ContainerShape and Shape in it the Container shape size can not be shrink-ed more than the previous BottomRight position of the shape in it (despite that the shape size is changed and there is space for the collapsing).


Available in LIB version: 2016.1.21

A small glitch appears when the pencil tool is used. The glitch is demonstrated in the attached image.

When you paste a big image (bigger than 1024px) it gets blurry

When you switch between two different positions and zoom levels leads to a wrong visualization of the diagram items.

Windows DPI is 125 % (you need to sign out from win 10 then sign in again in order to apply the setting successfully).

Diagram is hosted in RibbonWindow.

The diagram ruler does not show the ticks and labels on the left of the zero tick (label). The Position property of Diagram could (0,0) or (500, 0), (300, 0) etc...

Check the attached image for better illustration.

Workaround could be replacing the RibbonWindow with MS Window.

Add an option to customize the available colors in the SettingsPane control:

The middle point in this context is a point that is located on the line segment that is positioned after the middle length of the line. Add a property on the RadDiagramConnection class that returns the middle point. The property should be DependencyProperty so it can be bound with OneWayToSource mode in order to be able to notify the bound view model (if such is presented).

Currently, you can get this information by combining the CalculateMiddlePointOfLine and AllPoints methods of the ConnectionUtilities class.

var allConnectionPoints = Telerik.Windows.Diagrams.Core.ConnectionUtilities.ConnectionUtilities.AllPoints(radDiagramConnection);
var startAndEndPoints = new Tuple<Point, Point>(radDiagramConnection.StartPoint, radDiagramConnection.EndPoint);
Point middlePoint = Telerik.Windows.Diagrams.Core.ConnectionUtilities.CalculateMiddlePointOfLine(startAndEndPoints, allConnectionPoints);

Implement "Item to Item Snapping" during item resize operation.

DECLINED: Duplicate with https://feedback.telerik.com/Project/143/Feedback/Details/101276-diagram-implement-item-to-item-snapping-during-resize

Currently there is no straightforward way to notify that a point is added/removed from the ConnectionPoints collection of the RadDiagramConnection. 

Declined: Duplicate with http://feedback.telerik.com/Project/143/Feedback/Details/113488-diagrams-add-an-event-notifying-that-connectionpoint-is-added-or-removed

User sometimes need to use a Static Ruler which does not scale when you zoom the Diagram. Or when you pan. Just line with star 0, ticks, end 1024 for example. This line does not move and does nto scale.

There is no easy way to achieve this. UpdateScale method is private. It could be protected.

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In Q1 2014 SP DiagamRuler will draw itself and its ticks when its Diagram property is NOT set.

When an implicit theme is applied in the project the ShapeStyleSelector property of the RadDiagrams doesn't work. More specifically the selector is never called.

Create example with data base tables that visualizes self referencing business objects.

The shape positions are not correct in Firefox after HTML export if there are connection caps.

When using TreeLayout.Right if a shape has a single child that is shorter (in terms of height) the tops of the shapes are aligned, this means the centers of the shapes do not align and so the connection is 'crooked'. It would surely make more sense if the centres of the shapes were aligned.