|
|
| (4 intermediate revisions by one other user not shown) |
| Line 1: |
Line 1: |
| __NOTOC__
| | {{ Moved To Community | KDE_Visual_Design_Group/HIG/Slider }} |
| | |
| == Purpose ==
| |
| A ''slider'' is a widget with which a user may set a value by moving an indicator, usually in a horizontal fashion. The user may also click on a point on the slider to change the setting. It is different from a scrollbar in that it is typically used to adjust a value without changing the format of the display or the other information on the screen. A slider is used to set defined, contiguous values or a range of discrete values. It is a good choice when values have a relative quantity, not a numeric value. Usually, changes made on the slider are shown immediately. That instant feedback supports input that is not necessarily precise. Compared with spin controls a slider provides faster changes within a larger range but with lower accuracy. Sliders are almost solely operable by mouse.
| |
| | |
| == Guidelines ==
| |
| === Is this the right control ===
| |
| * Use a slider when adjusting the value relative to its current value is more important than choosing an absolute value.
| |
| * Use a slider when it is useful for the user to control the rate of change of the value in real time.
| |
| * If the value is open-ended on one or both ends, consider using a [[../Spin_Box|Spin Box]] instead.
| |
| === Behavior ===
| |
| * Try to give immediate feedback while user makes a selection.
| |
| * Size the control so that a user can easily set the desired value.
| |
| * Do not use a non-linear scale, e.g. logarithmic.
| |
| === Appearance ===
| |
| * Mark significant values along the length of the slider with text or tick marks.
| |
| * Label the slider with a text label to its left, using sentence capitalization. Provide an access key in the label that allows the user to give focus directly to the slider.
| |
| * Label the range of values; use tick marks and value label; don't label every tick mark.
| |
| | |
| == Implementation ==
| |
| * {{qt|QSlider}}
| |
| | |
| [[Category:Usability]][[Category:Behavior]][[Category:Editing_and_Manipulation]][[Category:Constrained_input]]
| |
Latest revision as of 12:09, 4 August 2016
