Button Attributes (XForms (Forms Library) - Version 1.2 (Rev. 4) A Graphical User Interface Toolkit for X)

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### 16.5 Button Attributes

For normal buttons the first color argument (`col1`) to `fl_set_object_color()` controls the normal color and the second (`col2`) the color the button has when pushed. For lightbuttons `col1` is the color of the light when off and `col2` the color when on. For round buttons, `col1` is the color of the circle and `col2` the color of the circle that is placed inside it when pushed. For round3dbutton, `col1` is the color of the inside of the circle and `col2` the color of the embedded circle. For bitmapbuttons, `col1` is the normal box color (or bitmap background if boxtype is not `FL_NO_BOX`) and `col2` is used to indicate the focus color. The foreground color of the bitmap is controlled by label color (as set via `fl_set_object_lcolor()`. For scrollbutton, `col1` is the overall boundbox color (if boxtype is not `FL_NO_BOX`), `col2` is the arrow color. The label of a scrollbutton must be a string with a number between 1 and 9 (except 5), indicating the arrow direction like on the numerical key pad. The label can have an optional prefix `#` to indicate uniform scaling. For example, the label `"#9"` tells that the arrow should be pointing up-right and the arrow has the identical width and height regardless the overall bounding box size.