Bug Tracker : Table « SWT JFace Eclipse « Java






Bug Tracker

Bug Tracker

/*******************************************************************************
 * All Right Reserved. Copyright (c) 1998, 2004 Jackwind Li Guojie
 * 
 * Created on Mar 3, 2004 7:53:44 PM by JACK $Id$
 *  
 ******************************************************************************/
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Arrays;
import java.util.Comparator;

import org.eclipse.jface.action.Action;
import org.eclipse.jface.action.Separator;
import org.eclipse.jface.action.ToolBarManager;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.TableEditor;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.MessageBox;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Table;
import org.eclipse.swt.widgets.TableColumn;
import org.eclipse.swt.widgets.TableItem;
import org.eclipse.swt.widgets.Text;
import org.eclipse.swt.widgets.ToolBar;

public class BugTracker {
  Display display = new Display();
  Shell shell = new Shell(display);

  Table table;

  Image bugIcon = new Image(shell.getDisplay(), "java2s.gif");

  public BugTracker() {
    GridLayout gridLayout = new GridLayout();
    shell.setLayout(gridLayout);
    shell.setText("Bug Tracking System");

    // Action.
    Action actionAddNew = new Action("New bug") {
      public void run() {
          // Append.
  TableItem item = new TableItem(table, SWT.NULL);
        item.setImage(bugIcon);
        table.select(table.getItemCount() - 1);
      }
    };

    Action actionDelete = new Action("Delete selected") {
      public void run() {
        int index = table.getSelectionIndex();
        if (index < 0) {
          System.out.println("Please select an item first. ");
          return;
        }
        MessageBox messageBox = new MessageBox(shell, SWT.YES | SWT.NO);
        messageBox.setText("Confirmation");
        messageBox.setMessage(
          "Are you sure to remove the bug with id #"
            + table.getItem(index).getText(0));
        if (messageBox.open() == SWT.YES) {
          table.remove(index);
        }
      }
    };

    Action actionSave = new Action("Save") {
      public void run() {
        saveBugs();
      }
    };

    ToolBar toolBar = new ToolBar(shell, SWT.RIGHT | SWT.FLAT);

    ToolBarManager manager = new ToolBarManager(toolBar);
    manager.add(actionAddNew);
    manager.add(actionDelete);
    manager.add(new Separator());
    manager.add(actionSave);
    manager.update(true);

    table = new Table(shell, SWT.BORDER | SWT.FULL_SELECTION);
    table.setLayoutData(new GridData(GridData.FILL_BOTH));

    table.setLinesVisible(true);
    table.setHeaderVisible(true);

    TableColumn tcID = new TableColumn(table, SWT.LEFT);
    tcID.setText("ID");

    TableColumn tcSummary = new TableColumn(table, SWT.NULL);
    tcSummary.setText("Summary");

    TableColumn tcAssignedTo = new TableColumn(table, SWT.NULL);
    tcAssignedTo.setText("Assigned to");

    TableColumn tcSolved = new TableColumn(table, SWT.NULL);
    tcSolved.setText("Solved");

    tcID.setWidth(60);
    tcSummary.setWidth(200);
    tcAssignedTo.setWidth(80);
    tcSolved.setWidth(50);

    table.pack();

    // Table editor.
    final TableEditor editor = new TableEditor(table);

    table.addListener(SWT.MouseDown, new Listener() {
      public void handleEvent(Event event) {
        // Locate the cell position.
        Point point = new Point(event.x, event.y);
        final TableItem item = table.getItem(point);
        if (item == null)
          return;
        int column = -1;
        for (int i = 0; i < table.getColumnCount(); i++) {
          Rectangle rect = item.getBounds(i);
          if (rect.contains(point))
            column = i;
        }
        if (column != 3)
          return;

        // Cell position located, now open the table editor.

        final Button button = new Button(table, SWT.CHECK);
        button.setSelection(
          item.getText(column).equalsIgnoreCase("YES"));

        editor.horizontalAlignment = SWT.LEFT;
        editor.grabHorizontal = true;

        editor.setEditor(button, item, column);

        final int selectedColumn = column;
        Listener buttonListener = new Listener() {
          public void handleEvent(final Event e) {
            switch (e.type) {
              case SWT.FocusOut :
                item.setText(
                  selectedColumn,
                  button.getSelection() ? "YES" : "NO");
                button.dispose();
                break;
              case SWT.Traverse :
                switch (e.detail) {
                  case SWT.TRAVERSE_RETURN :
                    item.setText(
                      selectedColumn,
                      button.getSelection()
                        ? "YES"
                        : "NO");
                    //FALL THROUGH
                  case SWT.TRAVERSE_ESCAPE :
                    button.dispose();
                    e.doit = false;
                }
                break;
            }
          }
        };

        button.addListener(SWT.FocusOut, buttonListener);
        button.addListener(SWT.Traverse, buttonListener);

        button.setFocus();

      }
    });

    table.addListener(SWT.MouseDown, new Listener() {
      public void handleEvent(Event event) {
        // Locate the cell position.
        Point point = new Point(event.x, event.y);
        final TableItem item = table.getItem(point);
        if (item == null)
          return;
        int column = -1;
        for (int i = 0; i < table.getColumnCount(); i++) {
          Rectangle rect = item.getBounds(i);
          if (rect.contains(point))
            column = i;
        }
        if (column < 0 || column >= 3)
          return;

        // Cell position located, now open the table editor.

        final Text text = new Text(table, SWT.NONE);
        text.setText(item.getText(column));

        editor.horizontalAlignment = SWT.LEFT;
        editor.grabHorizontal = true;

        editor.setEditor(text, item, column);

        final int selectedColumn = column;
        Listener textListener = new Listener() {
          public void handleEvent(final Event e) {
            switch (e.type) {
              case SWT.FocusOut :
                item.setText(selectedColumn, text.getText());
                text.dispose();
                break;
              case SWT.Traverse :
                switch (e.detail) {
                  case SWT.TRAVERSE_RETURN :
                    item.setText(
                      selectedColumn,
                      text.getText());
                    //FALL THROUGH
                  case SWT.TRAVERSE_ESCAPE :
                    text.dispose();
                    e.doit = false;
                }
                break;
            }
          }
        };

        text.addListener(SWT.FocusOut, textListener);
        text.addListener(SWT.Traverse, textListener);

        text.setFocus();
      }

    });

    loadBugs();

    table.addListener(SWT.Selection, new Listener() {
      public void handleEvent(Event event) {
        System.out.println("Selected: " + table.getSelection()[0]);
      }
    });
    
    Listener sortListener = new Listener() {
      public void handleEvent(Event event) {
        if(! (event.widget instanceof TableColumn))
          return;
        TableColumn tc = (TableColumn)event.widget;
        sortTable(table, table.indexOf(tc));
        System.out.println("The table is sorted by column #" + table.indexOf(tc));
      }
    };
    
    for(int i=0; i<table.getColumnCount(); i++)
      ((TableColumn)table.getColumn(i)).addListener(SWT.Selection, sortListener);

    shell.pack();
    shell.open();
    //textUser.forceFocus();

    // Set up the event loop.
    while (!shell.isDisposed()) {
      if (!display.readAndDispatch()) {
        // If no more entries in event queue
        display.sleep();
      }
    }

    display.dispose();
  }
  
  /**
   * Sorts the given table by the specified column.
   * @param columnIndex
   */
  public static void sortTable(Table table, int columnIndex) {
    if(table == null || table.getColumnCount() <= 1)
      return;
    if(columnIndex < 0 || columnIndex >= table.getColumnCount())
      throw new IllegalArgumentException("The specified column does not exist. ");
    
    final int colIndex = columnIndex;
    Comparator comparator = new Comparator() {
      public int compare(Object o1, Object o2) {
        return ((TableItem)o1).getText(colIndex).compareTo(((TableItem)o2).getText(colIndex));
      }

      public boolean equals(Object obj) {
        return false;
      }
    };
    
    TableItem[] tableItems = table.getItems();
    Arrays.sort(tableItems, comparator);
    
    for(int i=0; i<tableItems.length; i++) {
      TableItem item = new TableItem(table, SWT.NULL);
      for(int j=0; j<table.getColumnCount(); j++) {
        item.setText(j, tableItems[i].getText(j));
        item.setImage(j, tableItems[i].getImage(j));
      }
      tableItems[i].dispose();
    }
  }

  private void saveBugs() {
    // Save bugs to a file.
    DataOutputStream out = null;
    try {
      File file = new File("bugs.dat");

      out = new DataOutputStream(new FileOutputStream(file));

      for (int i = 0; i < table.getItemCount(); i++) {
        TableItem item = table.getItem(i);
        out.writeUTF(item.getText(0));
        out.writeUTF(item.getText(1));
        out.writeUTF(item.getText(2));
        out.writeBoolean(item.getText(3).equalsIgnoreCase("YES"));
      }
    } catch (IOException ioe) {
      // Ignore.
    } finally {
      try {
        if (out != null)
          out.close();
      } catch (IOException e) {
        e.printStackTrace();
      }
    }
  }

  private void loadBugs() {
    // Load bugs from a file.
    DataInputStream in = null;

    try {
      File file = new File("bugs.dat");
      if (!file.exists())
        return;
      in = new DataInputStream(new FileInputStream(file));

      while (true) {
        String id = in.readUTF();
        String summary = in.readUTF();
        String assignedTo = in.readUTF();
        boolean solved = in.readBoolean();

        TableItem item = new TableItem(table, SWT.NULL);
        item.setImage(bugIcon);
        item.setText(
          new String[] {
            id,
            summary,
            assignedTo,
            solved ? "Yes" : "No" });
      }

    } catch (IOException ioe) {
      // Ignore.

    } finally {
      try {
        if (in != null)
          in.close();
      } catch (IOException e) {
        e.printStackTrace();
      }
    }
  }

  public static void main(String[] args) {
    new BugTracker();
  }
}
           
       








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