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TextInputPanel.java
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// TextInputPanel.java
// Copyright (c) 2012 Andrew Downing
// Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
// The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
/** panel to receive text input from user */
public class TextInputPanel extends JPanel implements ActionListener {
private JTextField textField; /**< input text field */
private JButton button; /**< button to submit input */
private JLabel lblActionMsg; /**< label for displaying message or error when button clicked */
private ActionListener action; /**< reference to action to perform when button clicked */
/** constructor for text input panel */
public TextInputPanel(String instruction, String btnText, boolean passwordInput, ActionListener btnAction, Color backColor, Insets insets) {
// start setting up layout and contraints
GridBagConstraints gbc = new GridBagConstraints();
setBackground(backColor);
setLayout(new GridBagLayout());
gbc.weightx = 0.5;
gbc.insets = insets;
gbc.gridx = 0;
// instantiate components
if (passwordInput) {
textField = new JPasswordField(20);
}
else {
textField = new JTextField(20);
}
button = new JButton(btnText);
lblActionMsg = new JLabel();
// add components
gbc.gridy = 0;
add(new JLabel(instruction), gbc);
gbc.gridy = 1;
add(textField, gbc);
gbc.gridy = 2;
add(button, gbc);
gbc.gridy = 3;
add(lblActionMsg, gbc);
// register button listener
button.addActionListener(this);
// store reference to button action
action = btnAction;
}
/** reset text field and action message text */
public void reset() {
textField.setText("");
lblActionMsg.setText("");
}
/** display specified action message, allowing HTML formatting */
public void setActionMsg(String message) {
lblActionMsg.setText("<html>" + message + "</html>");
}
/** display specified action message in red text, allowing HTML formatting */
public void setActionError(String message) {
lblActionMsg.setText("<html><span style='color: red'>" + message + "</span></html>");
}
/** called when button clicked, and triggers new action event containing clicked text field's text */
public void actionPerformed(ActionEvent ae) {
action.actionPerformed(new ActionEvent(this, ActionEvent.ACTION_PERFORMED, textField.getText()));
textField.setText("");
}
}