The MVT is created with a few different GUI objects. Almost every tool uses the Plot2DPanel. It was also useful to create a number of GUI objects that are used over and over again. These include:

• TextBoxPanel: most of the gui text boxes on both the input panels and the options boxes use this. It simply consists of a JLabel and a JTextField. However, has the following useful methods:
  • public Function getFunction() which parses the string as a function in the text field and returns a Function or throws an exception due to an error.
  • public Variable getVariable() which parses the string as a variable in the text field and returns a Variable or throws an exception due to an error.
  • public double getDoubleValue() which parses the string as a double in the text field and returns a double or throws an exception due to an error. This uses the Parser.parseNumber() method which allows the user to enter a number like "pi" into such a box.
  • public double getIntegerValue() which parses the string as a integer in the text field and returns a int or throws an exception due to an error.
• InputPanel: Each tool has a panel at the bottom where most of the basic input is performed. This includes entering the function(s) and endpoints or other basic input. This class extends a JPanel and has no basic functionality beyond that. It is used for consistent structure amoung the tools more than anything.
• OptionsPanel: Like the InputPanel, this is used for basic structure. Since each tool has a set of options available. This is usually available for creating the options
• ColorListBox: Since most tools allow the option of various colors for the components. This is a simple way to choose the color. This is a simple version of the JColorChooser class.