UltraDateTimeEditor followup | Infragistics Forums

Hi Steve,

I took another look at this and it's very confusing to keep track of all the variations.

First, there are two different styles for the MonthCalendar. The style you see when you run AppStylist is the older style. Microsoft updated this control with a newer style that uses the system themes at some point.

When you run AppStylist, you are always seeing the old style MonthCalendar, regardless of your system theme.

When you create a new project in Visual Studio, depending on the version, Microsoft adds a line of code to your Main method which enables Visual Styles.

Application.EnableVisualStyles();

AppStylist is not doing this, which is why you see the old-style MonthCalendar on the AppStylist canvas.

So between the different OS themes, and EnableVisualStyles, there are a huge range of combinations here to deal with.

When Visual Styles are enabled and you are running under a theme which supports them, there is nothing you can do. The Color properties of the MonthCalendar are ignored.

In the older style,things get more complicated.

In addition to BackColor and ForeColor, I noticed that there are two other properties on he MonthCalendar: TitleBackColor and TitleForeColor. These properties affect the Title area of the MonthCalendar which includes the Month and Year, and the scrollbuttons, but does NOT include the days of the week. But, for some unfathomable reason, the days of the week, which are not in the title area and are drawn on the area of the control that uses the control's BackColor are using the TitleAreaBackColor to draw their text.

This seems like it's pretty clearly a bug in the MonthCalendar. But again, there's nothing we can do about this, except report it to Microsoft. And since this only applies to the old style, I don't expect Microsoft will be fixing it any time soon.

Of course, none of this helps you get what you need here.

So my question at this point is.. what is your goal here?

If your goal is to ensure that the text in the date dropdown is always readable to your users, then it should be possible for you to modify the isl file to uses colors that will be readable in all cases. You just have to make sure that you use a TitleAreaBackColor that has sufficient contrast so that it displays correctly against the BackColor you are using and also the TitleAreaForeColor.

The down side of this approach is that some users will see the themed dropdown, which probably won't look very good since it won't match the rest of your application.

If you goal is to always have the date dropdown by styled and match the rest of your application, then you will have to use something other than the MonthCalendar. That means either using UltraCalendarCombo (which does not have masking capability) or creating your own editor. The latter probably sounds like a pretty daunting task, but it's really not that bad.

What you can do is use the UltraMaskEdit control, or even the UltraDateTimeEditor, and use the ButtonsRight collection to add a DropDownEditorButton with an UltraMonthViewMulti control on it. This will combine masking and a style-able calendar control. You will have to write a little code to handle the interaction between the two, but it's not a huge amount of code and we could probably whip up a sample for you if you need it.

To answer your question - No, there is no way to change the default editor for the column. At least not in v9.1. In later versions (10.1 and up, if I am not mistaken), I am pretty sure there is a way to do this by deriving a class from the UltraWinGrid and overriding a method. This was something we added when we implemented our GanttView control.