8 DUIM-Gadgets Library
8.8 Value range gadgets
A value range gadget is any gadget whose value falls within a defined Dylan range.
Sliders, scroll bars, and scroll bars are all examples of value range gadgets. Value range gadgets provide immediate visual feedback of the value of the gadget at any time, as shown in Figure 8.7. In the case of sliders and scroll bars, the user can set the gadget-value by dragging the appropriate part of the gadget to a new point on the scale. Progress bars are typically used only to provide the user with feedback about the progress of a task.