Encapsulate your manual scribbling tool from lab exercise 4a.3 as a panel named DrawingPanel in a simple Java GUI frame named DrawingController. You don’t need to include a GUI control panel in this application.

Make sure that this GUI application runs properly.

Add a text field to the GUI frame that allows the user to specify the stroke weight. Do this as follows:

1. Declare a JTextField object to hold the stroke weight value;
2. In DrawingPanel:
   1. Include a mutator method that sets the strokeWeight - Don’t worry about checking the validity of the given value, we’ll deal with that next week;
3. In your DrawingController constructor method:
   1. Initialize that object to be a new JTextField named weightField with an initial value of “1” and a width of 3 characters (using new JTextField("1", 3));
   2. Register the current GUI controller object as the listener for this text field (using addActionListener(this));
   3. Add this field to your GUI frame (using add(weightField, BorderLayout.SOUTH)) - Note that you also need to modify the add for DrawingPanel so that it places that panel on the BorderLayout.NORTH;
4. In your DrawingController class definition:
   1. Specify that your GUI frame class implements the ActionListener interface (using implements ActionListener);
   2. Override the definition of actionPerformed() to implement this algorithm:

      Set weightValue = the integer value of the text in weightField.
      Ask DrawingPanel to set its weight value to weightValue.

Make sure that this GUI application runs properly.

Add a button to the interface to tells the drawing panel to use a random color. Do this as follows:

1. Declare a JButton object;
2. In DrawingPanel:
   1. Include a mutator method that sets the stroke color to a random color - Let the panel choose the new color rather than having the controller choose it (panels know about this sort of thing, controllers don’t). Note that in Java, colors are simply integers. However, you can still use the color method to return a color (e.g. int c = color(40, 40, 40);).
3. In your DrawingController constructor method:
   1. Initialize that object to be a new JButton with the label “random”;
   2. Register the current GUI controller object as the listener for this button;
   3. Build a new JPanel to hold your control panel as follows:
      1. Declare and initialize a new JPanel object named controlPanel;
      2. Set its layout manager to be a new FlowLayout (using controlPanel.setLayout(new FlowLayout()));
      3. Add to your new button to the control panel (using controlPanel.add(myWeightField)) - Note that you also need to modify the add for weightField so that you add it to the control panel as well;
      4. Add the control panel to the main GUI frame (using add(controlPanel));
4. In your actionPerformed() method:
   1. Modify the method implement this upgraded algorithm:

      Receive the current GUI action event from the calling program.
      Set weightValue = the integer value of the text in myWeightField.
      Ask the DrawingPanel object to set its weight value to weightValue.
      If the action event indicates that the random color button was pressed
               Tell the DrawingPanel object to set its color to a random color.

      Note that you can check the value of the action command using eventParameter.getActionCommand().equals("random") where “random” is the label written on the button.

Make sure that this GUI application runs properly.

Add an additional button that sets the color to white (the same as the sketch background) so that you can “rub out” mistakes.

Save this version of your program so that you can submit it.