1.145.1 Instance variables

slider-default: int|real|function

The default selection or function to get it. Used by slider->restore.

slider <-> drag: bool

When @on, dialog_item<-message will be activated on each drag-event received by the slider. Otherwise, dialog_item<-message will only be sent when the mouse-button is released.

Defaults: @off (only send at mouse-up).

slider <- format: [name]

Format specification used to represent the textual values. The specification is as for the C printf() call (see also string->format). The default format for floating point values is %f and for integers %d. The following defines a slider in 0.01 steps from 0.0 .. 1.0:

?- new(S, slider(value, 0.0, 1.0, 0.5)),
   send(S, format, '%.2f').

slider <- high: int|real

Together with slider<-low this variable describes the (including) range.

See also

- slider-selection
- slider-low

dialog_item <- label_font: font*

Font used to print the dialog_item<-label if slider<-show_label equals @on.

See also

slider-show_label

slider <- low: int|real

Lowest value for slider<->selection. See slider->high.

See also

- slider-selection
- slider-high

slider <- selection: int|real

Current value. An integer for which slider<-low <= slider<-selection <= slider<-high.

See also

- slider-high
- slider-low

slider <- show_label: bool

When @on, the dialog_item<-label of the slider is printed at the left-side in dialog_item<-label_font.

Defaults: @on

See also

- slider-show_value
- slider-label_font

slider <- show_value: bool

When @on, the current value is printed in textual format too. It will be printed in slider<-value_font.

Defaults: @on

See also

- slider-value_font
- slider-show_label

slider <- value_font: font

@see slider-show_value

slider-width: int

Length of the bar-part of the slider in pixels.

Defaults: 200 pixels.