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- 11-04-2012, 11:35 PM #1
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Action Listening/Handling Troubles.
Alright guys, in advance I thank you for reading this. I am doing a project and the prompt is here: http://pafbla.org/handbook/12-13-Pol...rogramming.PDF. You don't really need to read the prompt to fix my problem. So far I have some code (which will be below my ramblings) but I have not put in any ActionHandler yet. I kind of know the basics to ActionHandling (as in I've read numerous tutorials and can sort of get by). However, when you run the code below there is a JButton and a JComboBox. The JComboBox has 4 options besides the Default. So here is what my goal is: When either the JButton is Clicked, or one of the 4 (not including the "Select One" option...) selections in the JComboBox, a new screen appears. This will from there I want to be able to design the layout and content just like the first "panel". However, some of you may think it would be more beneficial to add a main or home button option throughout the entire program so they can get back to this original screen. I unfortunately don't know how to do that. Thanks! Code:
Java Code://Gaeron Friedrichs import javax.swing.*; import java.awt.*; public class swing { String[] options = {"Select One", "New Employee", "New Employer", "Edit Employee", "Edit Employer"}; JComboBox combobox = new JComboBox(options); public swing(){ frame(); } public void frame (){ JFrame frame = new JFrame("Employee Assessment Tool - Gaeron Friedrichs"); Container panel = frame.getContentPane(); SpringLayout layout = new SpringLayout(); panel.setLayout(layout); frame.setSize(950, 600); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); JLabel label = new JLabel("EAT (Employee Assessment Tool) is a system used for employee assessment and evaluation. Please select an option below."); label.setFont(new Font("Serif", Font.PLAIN, 18)); panel.add(label); layout.putConstraint(SpringLayout.HORIZONTAL_CENTER, label, 0, SpringLayout.HORIZONTAL_CENTER, panel); layout.putConstraint(SpringLayout.NORTH, label, -150, SpringLayout.VERTICAL_CENTER, panel); JLabel label2 = new JLabel("Gaeron Friedrichs 2012-2013"); label2.setFont(new Font("Serif",Font.PLAIN, 10)); panel.add(label2); layout.putConstraint(SpringLayout.HORIZONTAL_CENTER, label2, 0, SpringLayout.HORIZONTAL_CENTER, panel); layout.putConstraint(SpringLayout.VERTICAL_CENTER, label2, -30, SpringLayout.SOUTH, panel); JButton button = new JButton ("New Evaluation"); button.setToolTipText("Create a New Evaluation"); panel.add(button); layout.putConstraint(SpringLayout.HORIZONTAL_CENTER, button, -200, SpringLayout.HORIZONTAL_CENTER, panel); layout.putConstraint(SpringLayout.SOUTH, button, -50, SpringLayout.VERTICAL_CENTER, panel); combobox.setSelectedIndex(0); panel.add(combobox); combobox.setToolTipText("Select from other options."); layout.putConstraint(SpringLayout.EAST, combobox, 200, SpringLayout.HORIZONTAL_CENTER, panel); layout.putConstraint(SpringLayout.SOUTH, combobox, -50, SpringLayout.VERTICAL_CENTER, panel); } public static void main (String[] args){ new swing(); } }
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Re: Action Listening/Handling Troubles.
So what have you tried? Where are you stuck?
- 11-04-2012, 11:52 PM #3
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Re: Action Listening/Handling Troubles.
Well I did have the action handler in there before, but redid the whole thing without even touching the action handler. I can get the action handler in, put it in, no problem. And I could have a message or dialog box come up no problem once a certain thing has occurred. But I was always under the impression that message or dialog boxes were just for messages or dialogs? I need a new "panel" "window" whatever you would refer to it as, so I can take data from the user then assign it later to various strings, arrays, and write it into text files. I hope that helps a little bit more?
- 11-05-2012, 01:52 AM #4
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Re: Action Listening/Handling Troubles.
Alright, so I read some more and kept trying and I did manage to get it to work. I ended up doing it within button.addActionListener...Although, I do know that you can do it outside of (in this case) public void frame1(). However, I could not manage to get that to work. You guys are the experts, or at least know much more than I do. Should I keep it like how I have it? Or do it a better way (which may have to be elaborated on a little). Other than that, thank you so much for your help!
Java Code://Gaeron Friedrichs import javax.swing.*; import java.awt.*; import java.awt.event.*; public class GUI { String[] options = {"Select One", "New Employee", "New Employer", "Edit Employee", "Edit Employer"}; JComboBox combobox = new JComboBox(options); public GUI(){ frame1(); } public void frame1 (){ JFrame frame = new JFrame("Employee Assessment Tool - Gaeron Friedrichs"); frame.setVisible(true); Container panel = frame.getContentPane(); SpringLayout layout = new SpringLayout(); panel.setLayout(layout); frame.setSize(950, 600); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); JLabel label = new JLabel("EAT (Employee Assessment Tool) is a system used for employee assessment and evaluation. Please select an option below."); label.setFont(new Font("Serif", Font.PLAIN, 18)); panel.add(label); layout.putConstraint(SpringLayout.HORIZONTAL_CENTER, label, 0, SpringLayout.HORIZONTAL_CENTER, panel); layout.putConstraint(SpringLayout.NORTH, label, -150, SpringLayout.VERTICAL_CENTER, panel); JLabel label2 = new JLabel("Gaeron Friedrichs 2012-2013"); label2.setFont(new Font("Serif",Font.PLAIN, 10)); panel.add(label2); layout.putConstraint(SpringLayout.HORIZONTAL_CENTER, label2, 0, SpringLayout.HORIZONTAL_CENTER, panel); layout.putConstraint(SpringLayout.VERTICAL_CENTER, label2, -30, SpringLayout.SOUTH, panel); JButton button = new JButton ("New Evaluation"); button.setToolTipText("Create a New Evaluation"); panel.add(button); //button.addActionListener(AL1); layout.putConstraint(SpringLayout.HORIZONTAL_CENTER, button, -200, SpringLayout.HORIZONTAL_CENTER, panel); layout.putConstraint(SpringLayout.SOUTH, button, -50, SpringLayout.VERTICAL_CENTER, panel); button.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { JFrame frame = new JFrame("Employee Assessment Tool - Gaeron Friedrichs"); frame.setVisible(true); Container panel = frame.getContentPane(); SpringLayout layout = new SpringLayout(); panel.setLayout(layout); frame.setSize(950, 600); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); JLabel label = new JLabel("You clicked a button"); panel.add(label); } }); combobox.setSelectedIndex(0); panel.add(combobox); combobox.setToolTipText("Select from other options."); layout.putConstraint(SpringLayout.EAST, combobox, 200, SpringLayout.HORIZONTAL_CENTER, panel); layout.putConstraint(SpringLayout.SOUTH, combobox, -50, SpringLayout.VERTICAL_CENTER, panel); } }
Java Code:class MethCaller { public static void main (String[] args) { new GUI(); } }
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Re: Action Listening/Handling Troubles.
For starters your anonymous inner class ActionListener looks good. Next, if you absolutely must show a secondary window, you should have it be a dialog window, either modal or non-modal so that it is secondary to the main window. A JDialog would work well for this and in many ways is built similar to how you'd build your JFrame except that you'd pass the main JFrame in as a parameter to the dialog's constructor. The API will tell you what the constructor needs.
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