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Complex title in WinGrid
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I have a requirement to add a clickable link to the title of the WinGrid. The link should open a default email client. I was looking at the following possible solution:

1. Create a widget containing wingrid with hidden title and place a label with link instead of title.

2. Generate bitmap for the title and add event handler which will open default email client.

3. Somehow customize WinGrid title, which I don't know how to do because it looks like it take basic Text type only.

What do you think would be be the best way to do it? Did you have similar requirements?

Thank you.

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  • 69832
    Verified Answer
    Offline posted

    I originally set out to replace the TextUIElement in the caption area with a FormattedTextUIElement but the OnLinkClicked method never got called and it took less time to derive an element from TextUIElement and make it look like a link than it would have to try to figure out why the FormattedTextUIElement wasn't working. I'm sure I missed something simple so you can replace the LinkElement class here (see below) with that if you like:

    this.ultraGrid.DisplayLayout.CaptionVisible = DefaultableBoolean.True;
    this.ultraGrid.CreationFilter = new GridCaptionLinkCreationFilter( "somebody@somewhere.com" );

    #region LinkElement class
    public class LinkElement : TextUIElement
    {
        public LinkElement( UIElement parentElement, string text ) : base( parentElement, text ){}

        protected override void OnClick()
        {
            //  TODO: Open link
        }

        protected override void InitAppearance(ref AppearanceData appData, ref AppearancePropFlags flags)
        {
            if ( (flags & AppearancePropFlags.TextHAlign) == AppearancePropFlags.TextHAlign )
            {
                flags &= ~AppearancePropFlags.TextHAlign;
                appData.TextHAlign = HAlign.Center;
            }

            if ( (flags & AppearancePropFlags.FontUnderline) == AppearancePropFlags.FontUnderline )
            {
                flags &= ~AppearancePropFlags.FontUnderline;
                appData.FontData.Underline = DefaultableBoolean.True;
            }

            if ( (flags & AppearancePropFlags.ForeColor) == AppearancePropFlags.ForeColor )
            {
                flags &= ~AppearancePropFlags.ForeColor;
                appData.ForeColor = SystemColors.HotTrack;
            }

            if ( (flags & AppearancePropFlags.Cursor) == AppearancePropFlags.Cursor )
            {
                flags &= ~AppearancePropFlags.Cursor;
                appData.Cursor = Cursors.Hand;
            }

            base.InitAppearance(ref appData, ref flags);
        }
    }
    #endregion LinkElement class

    #region GridCaptionLinkCreationFilter class
    private class GridCaptionLinkCreationFilter : IUIElementCreationFilter
    {
        private string linkText = null;
        public GridCaptionLinkCreationFilter( string linkText )
        {
            this.linkText = linkText;
        }

        #region IUIElementCreationFilter Members

        public void AfterCreateChildElements(UIElement parent)
        {
            CaptionAreaUIElement captionAreaElement = parent as CaptionAreaUIElement;
            if ( captionAreaElement != null )
            {
                UIElement element = captionAreaElement.GetDescendant( typeof(TextUIElement) );
                if ( element != null )
                {
                    Rectangle rect = element.Rect;
                    captionAreaElement.ChildElements.Remove( element );
                    LinkElement linkElement =
                        new LinkElement( captionAreaElement, this.linkText );

                    linkElement.Rect = rect;
                    captionAreaElement.ChildElements.Add( linkElement );
                }
            }
        }

        public bool BeforeCreateChildElements(UIElement parent)
        {
            return false;
        }

        #endregion
    }
    #endregion GridCaptionLinkCreationFilter class

     

    EDIT

    I just remembered what it was, you have to wrap the text you assign in an anchor (<a></a>) tag. So the LinkElement implementation then becomes this:

    #region LinkElement class
    public class LinkElement : Infragistics.Win.FormattedLinkLabel.FormattedTextUIElement
    {
        public LinkElement( UIElement parentElement, string text ) : base( parentElement)
        {
            this.Value = new Infragistics.Win.FormattedLinkLabel.ParsedFormattedTextValue(text);
        }


        protected override void OnLinkClicked(Infragistics.Win.FormattedLinkLabel.LinkClickedEventArgs e)
        {
            base.OnLinkClicked(e);
        }

    }
    #endregion LinkElement class

     

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