[ULC-developer] Problem, using a CheckBox CellEditor/-Renderer

[Daniel . Backhausen]

Hello!

We encountered a problem using checkboxes as cell editor/renderer. For
unknown reason, checking the boxes doesn't work so well since the newest
ULC version (6.1/6.1.1). We have several checkboxes in a table, to set
options to different entries. The first column works like a radio button,
where only one tableentry may have that option checked.

May be the attached snipped will help you to show the problem. You have to
play with it and try to uncheck the only checkbox of the first column.
After the alert window is shown, the checkboxs' de-/selection doesn't
work(!) so fine any longer. It seems, the 'fireTableDataChanged()' doesn't
make his job because of a focus problem.


Thank you and best regards,
Daniel Backhausen


------------------ BEGIN: SNIPPED ------------------

package com.canoo.snipped;

import java.awt.event.MouseListener;
import java.util.Enumeration;

import com.ulcjava.base.application.AbstractApplication;
import com.ulcjava.base.application.ApplicationContext;
import com.ulcjava.base.application.IEditorComponent;
import com.ulcjava.base.application.IRendererComponent;
import com.ulcjava.base.application.ULCAlert;
import com.ulcjava.base.application.ULCCheckBox;
import com.ulcjava.base.application.ULCDialog;
import com.ulcjava.base.application.ULCFrame;
import com.ulcjava.base.application.ULCListSelectionModel;
import com.ulcjava.base.application.ULCMenuItem;
import com.ulcjava.base.application.ULCPopupMenu;
import com.ulcjava.base.application.ULCScrollPane;
import com.ulcjava.base.application.ULCTable;
import com.ulcjava.base.application.event.IListSelectionListener;
import com.ulcjava.base.application.event.IWindowListener;
import com.ulcjava.base.application.event.ListSelectionEvent;
import com.ulcjava.base.application.event.WindowEvent;
import com.ulcjava.base.application.table.AbstractTableModel;
import com.ulcjava.base.application.table.ITableCellEditor;
import com.ulcjava.base.application.table.ITableCellRenderer;
import com.ulcjava.base.application.table.ULCTableColumn;
import com.ulcjava.base.client.UITable;
import com.ulcjava.base.development.DevelopmentRunner;

public class ULCCheckBoxCellEditorSnipped extends AbstractApplication {
  private ULCFrame frame;

  public void start() {
    this.frame = new ULCFrame("ULCTable CheckBox CellEditor Sample");

    frame.setSize(100, 250);

    ULCMyTable table = new ULCMyTable();
    table.setModel(new DummyTableModel());

    ULCPopupMenu pop = new ULCPopupMenu("Test");
    pop.add(new ULCMenuItem("ABC"));
    table.setComponentPopupMenu(pop);
    table.getSelectionModel().addListSelectionListener(new
    IListSelectionListener() {
      public void valueChanged(ListSelectionEvent event) {
        System.out.println("Selection changed -> "
            + "Row: " +
      ((ULCListSelectionModel)event.getSource()).getMinSelectionIndex());
      }
    });

    for (Enumeration columns = table.getColumnModel().getColumns();
      columns.hasMoreElements() ;) {
      final ULCTableColumn column = (ULCTableColumn) columns.nextElement();
      column.setCellRenderer(new ITableCellRenderer() {
        public IRendererComponent getTableCellRendererComponent(ULCTable
          arg0, Object arg1, boolean arg2, boolean arg3, int arg4) {
          return new ULCCheckBox();
        }
      });
      column.setCellEditor(new ITableCellEditor() {
        public IEditorComponent getTableCellEditorComponent(ULCTable arg0,
          Object arg1, int arg2) {
          return new ULCCheckBox();
        }
      });
    }

    frame.add(new ULCScrollPane(table));
    frame.setVisible(true);
    frame.setDefaultCloseOperation(ULCDialog.DISPOSE_ON_CLOSE);
    frame.addWindowListener(new IWindowListener() {
      public void windowClosing(WindowEvent arg0) {
        ApplicationContext.terminate();
      }
    });
  }

  public static void main(String[] args) {
    DevelopmentRunner.setApplicationClass(ULCCheckBoxCellEditorSnipped.class);

    DevelopmentRunner.main(args);
  }

  private class DummyTableModel extends AbstractTableModel {
    private int currentRow = 0;

    public int getRowCount() {
      return 10;
    }

    public int getColumnCount() {
      return 5;
    }

    public Object getValueAt(int row, int column) {
      switch (column) {
        case 0:
          return (row == currentRow) ? Boolean.TRUE : Boolean.FALSE;
        default:
          return (Math.random() < 0.5) ? Boolean.TRUE : Boolean.FALSE;
      }
    }

    public boolean isCellEditable(int rowIndex, int columnIndex) {
      return true;
    }

    public void setValueAt(Object value, int row, int column) {
      if (column == 0) {
        if (row == currentRow) {
          final ULCAlert alert = new ULCAlert(frame, "Warning", "You can´t
          uncheck me!", "Okidoki");
          alert.show();
          fireTableCellUpdated(row, column);
        } else {
          this.currentRow = row;
          fireTableDataChanged();
        }
      }
    }
  }

  public static class ULCMyTable extends ULCTable {
    protected String typeString() {
      return UIMyTable.class.getName();
    }
  }

  public static class UIMyTable extends UITable {
    protected void postInitializeState() {
      super.postInitializeState();
      MouseListener[] list = getBasicComponent().getMouseListeners();

      for (int i = 0; i < list.length; i++) {
        MouseListener l = list[i];
        getBasicComponent().removeMouseListener(l);
        if (i == 4) {
          list[4] = list[3];
          list[3] = l;
        }
      }

      for (int j = 0; j < list.length; j++) {
        getBasicComponent().addMouseListener(list[j]);
      }
    }
  }
}

------------------ END: SNIPPED ------------------

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