It seems I cannot get away without having button specs on the new columns. So I’ve added a ButtonSpecs collection to the column class of each of the following types…

• DateTimePicker
• MaskedTextBox
• NumericUpDown
• DomainUpDown
• ComboBox

Here you can see a couple of example images…

To make life a little easier for the developer I have added a ButtonSpecClick event onto the columns that is fired whenever any button spec is clicked for any cell in that column. This event has parameters that made it easy to get hold of the column, cell and button spec instances involved in that click. Stops you needing to walk around the data structures finding your way from the button spec to the cell and then the column, which although not hard is certainly a pain to work out each time you need to do it.

Note that there are no button specs on the already defined Krypton columns  TextBox/CheckBox/Button/Link. This is because they work in a different way that makes it impractical to add them. All the new columns have an instance of an actual control that is used when editing the cell. So when you click on a numeric column it uses a KryptonNumericUpDown instance perform the drawing and editing. As the KryptonNumericUpDown already has support for button specs this makes it possible to add that capability by moving the button specs from the column collection into the control for the duration of editing. But the TextBox/CheckBox/Button/Link columns all perform drawing by using direct calls to the renderer and adding extra code to simulate the presence of buttons is not a pleasant thought.

This entry was posted on Monday, January 11th, 2010 at 2:55 pm and is filed under Krypton Toolkit. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.