Yes, I have tried that without success... Blanks were my first though... ;-)

/Henrik

Hi Henrik,

Sorry about that, I should have commented the code the first time. :)

    public class AddNewBoxHiddenCaption_DrawFilter : IUIElementDrawFilter
    {

        #region IUIElementDrawFilter Members

        bool IUIElementDrawFilter.DrawElement(DrawPhase drawPhase, ref UIElementDrawParams drawParams)
        {
            // We should only get in here for a DependentTextUIElement that is a child of an 
            // AddNewBoxUIElement - because that's what GetPhasesToFilter is returning. 
            // Just to be safe, we could do some sanity checks here.
            //
            if (drawParams.Element is DependentTextUIElement == false)
            {
                Debug.Fail("DrawElement is firing for an element that is not a DependentTextUIElement; unexpected.");
                return false;
            }

            if (drawParams.Element.Parent is AddNewBoxUIElement == false)
            {
                Debug.Fail("DrawElement is firing for an element that is not a child of the AddNewBoxUIElement; unexpected.");
                return false;
            }


            switch (drawPhase)
            {
                case DrawPhase.BeforeDrawForeground:
                    // Return true to indicate to the grid that the drawing of the foreground for this 
                    // element has already been handled. The grid will not draw any foreground, and 
                    // since we did not draw anything, either, the foreground drawing is effectively
                    // cancelled. 
                    //
                    return true;
                default:
                    // GetPhasesToFilter never returns any other phase besides BeforeDrawForeground. So
                    // we should never get here. 
                    Debug.Fail("DrawElement is firing for a pahse other than BeforeDrawForeground; unexpected.");
                    break;
            }

            // Do nothing. 
            return false;
        }

        DrawPhase IUIElementDrawFilter.GetPhasesToFilter(ref UIElementDrawParams drawParams)
        {
            // Look for a DependentTextUIElement that is a child of the AddNewBoxUIElement. 
            // This is the element that draws the AddNewBox caption. 
            //
            if (drawParams.Element is DependentTextUIElement &&
                drawParams.Element.Parent is AddNewBoxUIElement)
            {
                // Fire the BeforeDrawForeGround phase. 
                return DrawPhase.BeforeDrawForeground;
            }

            // Do nothing. 
            return DrawPhase.None;
        }

        #endregion
    }

It works, even if I use InitializeLayout. I missed to set a character instead of a null string as AddNewBox.Prompt. Sorry for that...

Before we close this thread, could you please write a few lines explaining what this code really does? I haven't been working with drawfilters before and i suppose that this code in some way or another cancels the draw operation for the addnewbox prompt text...

thanks for a good solution!

/henrik

The code you have here looks fine to me. Are you saying this is not working?

Maybe InitializeLayout is too late. Try using Form_Load.

Hello Mike!

Thanks for the code. I have implemented to code in my project (except for the *region* thing) . unfortunately I am not sure how to use this since I haven't used any drawfilters before. I am not sure what they do...

What I did was the following: (in the initializelayout event of the form)

ug.DrawFilter = df (ug ismy ultra

I suppose that you will have to explain this a bit more for me to understand... sorry for that ...

/Henrik

Hi,

Sorry, that was a bad suggestion. Setting the ForeColor will not work, since it just gets overriden by the isl file.

You will need to use a DrawFilter. In this case, it's a pretty simple one:

    public class AddNewBoxHiddenCaption_DrawFilter : IUIElementDrawFilter
    {

        #region IUIElementDrawFilter Members

        bool IUIElementDrawFilter.DrawElement(DrawPhase drawPhase, ref UIElementDrawParams drawParams)
        {
            return true;
        }

        DrawPhase IUIElementDrawFilter.GetPhasesToFilter(ref UIElementDrawParams drawParams)
        {
            if (drawParams.Element is DependentTextUIElement &&
                drawParams.Element.Parent is AddNewBoxUIElement)
            {
                return DrawPhase.BeforeDrawForeground;
            }

            return DrawPhase.None;
        }

        #endregion
    }