Hi Mike,

thanks, but the manual does not describe how to show the dotted line around the checkbox itself. It only shows how to remove the dotted line.

thanks

Stefan

 Hi Stefan,

Oh, sorry, I misread the question. Doesn't the UltraTextEditor show a focus rectangle when it has focus? I am pretty sure it does this automatically. If not, you would have to draw it yourself using a DrawFilter. 

For the next one looking for the complete solution, here it is

public partial class MyCheckEditor : UltraCheckEditor
    {
        private const int PenWidth = 1;

        public MyCheckEditor()
        {
            InitializeComponent();
            if (!DesignMode)
            {
                CreationFilter = new FocusCreationFilter();
                DrawFilter = new FocusDrawFilter();
            }
        }

        private class FocusDrawFilter : IUIElementDrawFilter
        {
            private bool _wasMyCheckEditorMoved;

            DrawPhase IUIElementDrawFilter.GetPhasesToFilter(ref UIElementDrawParams drawParams)
            {
                if (drawParams.Element is UltraCheckControlUIElement)
                {
                    return DrawPhase.BeforeDrawElement;
                }
                if (drawParams.Element is CheckIndicatorUIElement)
                {
                    return DrawPhase.BeforeDrawElement;
                }
                return DrawPhase.None;
            }

            bool IUIElementDrawFilter.DrawElement(DrawPhase drawPhase, ref UIElementDrawParams drawParams)
            {
                if (drawParams.Element is UltraCheckControlUIElement)
                {
                    // move the UltraCheckEditor to the left for the same number of pixels
                    // as the width of the pen because we moved every child element
                    // to leave enough space to draw the left side of the focus rectangle
                    if(!_wasMyCheckEditorMoved)
                    {
                        Control control = drawParams.ControlElement.Control;
                        control.Size = new Size(control.Width + PenWidth, control.Height);
                        control.Location = new Point(control.Location.X - PenWidth, control.Location.Y);
                        _wasMyCheckEditorMoved = true;
                    }
                }
                else if (drawParams.Element is CheckIndicatorUIElement)
                {
                    if (drawParams.ControlElement.Control.Focused &&
                        (drawParams.ControlElement.Control.Text == null
                        || drawParams.ControlElement.Control.Text.Trim() == string.Empty))
                    {
                        Rectangle elementRect = drawParams.Element.Rect;
                        Pen pen = new Pen(Color.Black, PenWidth);
                        pen.DashStyle = DashStyle.Dot;
                        //draw the focus rectangle outside the checkbox
                        drawParams.Graphics.DrawRectangle(pen, elementRect.X - PenWidth, elementRect.Y - PenWidth, elementRect.Width + PenWidth, elementRect.Height + PenWidth);
                        return false;
                    }
                }
                return false;
            }
        }

        private class FocusCreationFilter  : IUIElementCreationFilter
        {
            #region Implementation of IUIElementCreationFilter

            bool IUIElementCreationFilter.BeforeCreateChildElements(UIElement parent)
            {
                return false;
            }

            void IUIElementCreationFilter.AfterCreateChildElements(UIElement parent)
            {
                if (parent is CheckEditorCheckBoxUIElement)
                {
                    // move every child element to the right for the same number of pixels
                    // as the width of the pen to leave enough space to draw the left side of
                    // the focus rectangle
                    foreach (var element in parent.ChildElements)
                    {
                        element.Rect = new Rectangle(element.Rect.X + PenWidth, element.Rect.Y, element.Rect.Width, element.Rect.Height);
                    }
                }
            }
            #endregion
        }
    }

Thanks. I think I figured this out

Please I have the same issue as you.

Please how did you implement the DrawFilter?

OysterInnovations

You won't be able to move the actual rectangle of the element without using a CreationFilter, I don't believe, since at this point the main UIElement has positioned its child element.

-Matt

Hi,

I have implemented a drawfilter to draw a dotted line around the checkIndicatorUIElement. This works fine ;-) BUT since the Element is also drawn completely to the left ( x = 0 ) I want to move it a couple to pixels to the right. Somehow the location property is not the right way....

Maybe you could give me a hint what to do:

drawParams.Graphics.DrawRectangle(new System.Drawing.Pen(System.Drawing.Color.Red), elementRect.X , elementRect.Y + 1, elementRect.Width, elementRect.Height);

else

return Infragistics.Win.DrawPhase.BeforeDrawElement;

else