deletevideodialog.java

来自「本人写的一个简单VCD租赁系统」· Java 代码 · 共 176 行

//************************************************
//DeleteVideoDialog.java
//This class is used to create an GUI dialog for
//deleting videos from the stock.
//Created by Xiaobin Lin               3/Dec/2004
//************************************************

package Main;

import javax.swing.*;
import javax.swing.WindowConstants.*;
import javax.swing.event.*;
import java.awt.*;
import java.awt.event.*;

public class DeleteVideoDialog extends JDialog {
    
    //Constructor: automatically invoked when a new instance of DeleteVideoDialog is created
    public DeleteVideoDialog(java.awt.Frame parent, boolean modal, VideoSet vSet, LendingSet lSet) {
        super(parent, modal);
        videoSet = vSet;
        lendingSet = lSet;
        tableHandlerVideo = new TableHandler(videoSet);
        rowSelected = -1;
        initComponents();
    }
    
    // This method is called from within the constructor to
    // initialize the GUI for the delete-video dialog.
    private void initComponents() {
        scrollPaneVideo = new JScrollPane();
        tableVideo = new JTable();
        labelTableName = new JLabel();
        panelMessage = new JPanel();
        textAreaStep = new JTextArea();
        labelSteps = new JLabel();
        labelNotes = new JLabel();
        textAreaNotes = new JTextArea();
        buttonDelete = new JButton();
        buttonCancel = new JButton();

        getContentPane().setLayout(null);

        setDefaultCloseOperation(DISPOSE_ON_CLOSE);
        setTitle("Delete a Video");
        setName("dialogDeleteVideo");
        setResizable(false);
        scrollPaneVideo.setFont(new Font("Times New Roman", 0, 12));
        tableVideo.setFont(new Font("Times New Roman", 0, 12));
        tableVideo.setModel(tableHandlerVideo);
        tableVideo.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
        ListSelectionModel rowSM = tableVideo.getSelectionModel();
        rowSM.addListSelectionListener(new ListSelectionListener() {
            public void valueChanged(ListSelectionEvent e) {
                //Ignore extra messages.
                if (e.getValueIsAdjusting()) return;

                ListSelectionModel lsm = (ListSelectionModel)e.getSource();
                if (lsm.isSelectionEmpty()) {
                    buttonDelete.setEnabled(false);
                } else {
                    rowSelected = lsm.getMinSelectionIndex();
                    videoIndex = rowSelected;
                    buttonDelete.setEnabled(true);
                }
            }
        });
        scrollPaneVideo.setViewportView(tableVideo);

        getContentPane().add(scrollPaneVideo);
        scrollPaneVideo.setBounds(180, 40, 380, 290);

        labelTableName.setFont(new Font("Times New Roman", 1, 14));
        labelTableName.setText("Video Table");
        getContentPane().add(labelTableName);
        labelTableName.setBounds(180, 10, 130, 20);

        panelMessage.setLayout(null);

        panelMessage.setFont(new Font("Times New Roman", 0, 12));
        textAreaStep.setEditable(false);
        textAreaStep.setFont(new Font("Times New Roman", 1, 12));
        textAreaStep.setText("Select a video from the video\ntable then click the \"delete\" \nbutton.");
        textAreaStep.setFocusable(false);
        textAreaStep.setOpaque(false);
        panelMessage.add(textAreaStep);
        textAreaStep.setBounds(10, 50, 160, 60);

        labelSteps.setFont(new Font("Times New Roman", 1, 14));
        labelSteps.setText("Steps");
        panelMessage.add(labelSteps);
        labelSteps.setBounds(10, 10, 40, 20);

        labelNotes.setFont(new Font("Times New Roman", 1, 14));
        labelNotes.setText("Notes");
        panelMessage.add(labelNotes);
        labelNotes.setBounds(10, 200, 40, 20);

        textAreaNotes.setEditable(false);
        textAreaNotes.setFont(new Font("Times New Roman", 1, 12));
        textAreaNotes.setText("When a video is deleted, the\nlending record regarding this\nvideo will be deleted as well.");
        textAreaNotes.setFocusable(false);
        textAreaNotes.setOpaque(false);
        panelMessage.add(textAreaNotes);
        textAreaNotes.setBounds(10, 240, 160, 80);

        getContentPane().add(panelMessage);
        panelMessage.setBounds(0, 0, 180, 330);

        buttonDelete.setFont(new Font("Times New Roman", 0, 12));
        buttonDelete.setText("Delete");
        buttonDelete.setEnabled(false);
        buttonDelete.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent evt) {
                buttonDeleteActionPerformed(evt);
            }
        });

        getContentPane().add(buttonDelete);
        buttonDelete.setBounds(380, 350, 80, 23);

        buttonCancel.setFont(new Font("Times New Roman", 0, 12));
        buttonCancel.setText("Cancel");
        buttonCancel.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent evt) {
                buttonCancelActionPerformed(evt);
            }
        });

        getContentPane().add(buttonCancel);
        buttonCancel.setBounds(470, 350, 80, 23);

        Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
        setBounds((screenSize.width-570)/2, (screenSize.height-420)/2, 570, 420);
    }//the end of initComponents

    //when cancel button is pressed
    private void buttonCancelActionPerformed(ActionEvent evt) {
        exitDialog();
    }
    
    //when delete button is pressed
    private void buttonDeleteActionPerformed(ActionEvent evt) {
        int posInLendingSet = lendingSet.findVideo(videoIndex);
        if (posInLendingSet != -1){
             lendingSet.removeLending(posInLendingSet);        
        }
        videoSet.removeVideo(videoIndex);
        exitDialog();
    }
    
    //close dialog
    private void exitDialog(){
        setVisible(false);
        dispose();        
    }
    
    // Variables declaration - GUI-related
    private JButton buttonCancel;
    private JButton buttonDelete;
    private JLabel labelNotes;
    private JLabel labelSteps;
    private JLabel labelTableName;
    private JPanel panelMessage;
    private JScrollPane scrollPaneVideo;
    private JTable tableVideo;
    private JTextArea textAreaNotes;
    private JTextArea textAreaStep;
    // Variables declaration - non-GUI-related
    private VideoSet videoSet;
    private LendingSet lendingSet;
    private TableHandler tableHandlerVideo;
    private int rowSelected;
    private int videoIndex;
}