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1000 Java Tips ebook
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Easy Learn Java: Programming Articles, Examples and Tips - Page 348
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1060 Stories (530 Pages, 2 Per Page)
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Java: Sliders
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Introduction
A slider (JSlider class) lets the user easily select from a range
of integer values. Use sliders for integer input whenever you can. They are
easier for the user than text fields, and there is no possibility of illegal
input values, so your programming is simpler.
Constructors
The usual constructor is JSlider s = new JSlider(orientation, min, max, initial);
orientation: JSlider.HORIZONTAL or
JSlider.VERTICAL
min: The minimum value.
max: The maximum value.
initial: The initial value.
Example:
JSlider sl = new JSlider(JSlider.HORIZONTAL, 0, 20, 10);
Tick Marks
You can add both major and minor tick marks.
You must call setPaintTicks(true) to make the tick marks appear.
Here is an example that sets major tick marks every 10 values and minor tick
marks every 1 value:
sl.setMajorTickSpacing(10); // sets numbers for biggest tick marks
sl.setMinorTickSpacing(1); // smaller tick marks
sl.setPaintTicks(true); // display the ticks
Labels
To display the values next to the major tick marks:
sl.setPaintLabels(true);
Listeners and getting the slider value
See
Change Listener to see how to do something when the slider is changed.
Advanced Appearance
In addition to tick marks, you can specify text or icon labels at any values
that you specify using setLabelTable(...). You can also specify
which end of the slider should have the high or low values using
setInverted(true/false).
5 comments |   | Score: 0
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Posted by jalex on Friday, April 22, 2005 (00:00:00) (3689 reads)
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