Chapter 12, Problem 13AW

Explanation of Solution

Slider control:

• A “Slider” is a control that permits the user to graphically adjust a number within a range of values.
• It shows an image of a “slider knob” that can be dragged along a track.
  • It can be oriented horizontally or vertically.
• “Slider” control is created with the help of “Slider” class.
  • It is available in the “javafx.scene.control” package.
• The range of “Slider” control is represented by a numeric value.
  • The minimum range’s value is present at the one end of “Slider”.
  • The maximum range’s value is present at the other end of “Slider”.
• “Slider” controls contains a numeric value, and as the user moves the knob along the track, the numeric value is adjusted correspondingly.
• The “Slider” class contains two constructors such as no-argument constructor and argument constructor.
  • “no-argument” constructor:
    • It creates a “Slider” with a minimum value of “0”and a maximum value of “100”.
    • In this constructor, the initial value will be assigned to “0”.
    • No tick marks will be showed in this constructor.
    • Example: Slider exampleSlider = new Slider();
  • “argument” constructor:
    • This constructor accepts three arguments.
      • Minimum value
      • Maximum value
      • Initial value
    • Example: Slider exampleSlider = new Slider(0.0, 60.0, 35.0);
      • From the above example, the minimum value is “0”, maximum value is “60” and the initial value is “35”.
    • Methods in “Slider” class is used to set the tick marks, their spacing and label appearance.
• The “Slider” controls are oriented horizontally by default.

Example:

The example for creates the horizontal slider is shown below:

//create a slider...