use-real-combo-box

Arguments: combo-box-column-mixin

Returns true or nil to indicate whether the argument, which must be an instance of grid-column and of the mixin class combo-box-column-mixin, uses a standard combo-box control to show its drop-down list of choices, rather than using whatever simulation of a combo-box control is used by default (the default is nil).

This provides a choice for alternative styles for grid-widget combo-box cells, and an application may use whichever one is more suitable for it. This property may be set either by calling the setf of this function or by passing the :use-real-combo-box initarg to make-instance.

In the current Windows implementation, the default value of nil causes a pop-up menu to be used. The menu will always be as wide as needed in order to display the complete string for each choice. A value of true causes a Windows combo-box to be used instead. The combo-box will always be just as wide as the grid-column is, and therefore may clip some of the choice strings. The combo-box may be closed by pressing alt-uparrow, as with a standalone combo-box control. Alt-downarrow may be used to open either type, as an alternative to pressing either the spacebar or the return key. The two styles have different borders.

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This page was not revised from the 8.1 page.
Created 2010.1.21.