Examples of java.awt.Checkbox

java.awt.Checkbox
A check box is a graphical component that can be in either an "on" (true) or "off" (false) state. Clicking on a check box changes its state from "on" to "off," or from "off" to "on."
The following code example creates a set of check boxes in a grid layout:
```
 setLayout(new GridLayout(3, 1)); add(new Checkbox("one", null, true)); add(new Checkbox("two")); add(new Checkbox("three")); 
```
This image depicts the check boxes and grid layout created by this code example:

The button labeled one is in the "on" state, and the other two are in the "off" state. In this example, which uses the GridLayout class, the states of the three check boxes are set independently.
Alternatively, several check boxes can be grouped together under the control of a single object, using the CheckboxGroup class. In a check box group, at most one button can be in the "on" state at any given time. Clicking on a check box to turn it on forces any other check box in the same group that is on into the "off" state. @version 1.89 10/31/08 @author Sami Shaio @see java.awt.GridLayout @see java.awt.CheckboxGroup @since JDK1.0

   private Panel createLogLevelBoxes()
   {
      Panel container = new Panel();
      container.setLayout(new GridLayout(1, 7));


      Checkbox error = new Checkbox("ERROR", null, true);
      error.addItemListener(new LogLevelListener());
      container.add(error);


      Checkbox warning = new Checkbox("WARN", null, true);
      warning.addItemListener(new LogLevelListener());
      container.add(warning);


      Checkbox info = new Checkbox("INFO", null, true);
      info.addItemListener(new LogLevelListener());
      container.add(info);


      if (true/*log.CALL*/) { // log.CALL=true/false: check for dead code elimination
         Checkbox calls = new Checkbox("CALL", null, false);
         calls.addItemListener(new LogLevelListener());
         container.add(calls);
      }


      if (true/*log.TIME*/) {
         Checkbox time = new Checkbox("TIME", null, false);
         time.addItemListener(new LogLevelListener());
         container.add(time);
      }


      if (true/*log.TRACE*/) {
         Checkbox trace = new Checkbox("TRACE", null, false);
         trace.addItemListener(new LogLevelListener());
         container.add(trace);
      }


      if (true/*log.DUMP*/) {
         Checkbox dump = new Checkbox("DUMP", null, false);
         dump.addItemListener(new LogLevelListener());
         container.add(dump);
      }
      return container;
   }

View Full Code Here

            titlePanel2.setLayout( new BorderLayout() );
            titlePanel2.add( titlePanel, BorderLayout.WEST );
            buildCommand( panel, gridBag, c, getRes().getString( "Set Console Title" ), "console_title", titlePanel2 );
            
            m_childCommand = new TextField( getRes().getString( "(Please enter command)" ) );
            m_childDetached = new Checkbox( getRes().getString( "Detached  (Professional)" ), false);
            Panel childPanel = new Panel();
            childPanel.setLayout( new BorderLayout() );
            childPanel.add( new Label( getRes().getString( "Command: " ) ), BorderLayout.WEST );
            childPanel.add( m_childCommand, BorderLayout.CENTER );
            childPanel.add( m_childDetached, BorderLayout.EAST );

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            remove.addActionListener(this);
            remove.setToolTipText(Messages.getString("AWTFileSelector.removeSelected")); //$NON-NLS-1$
            z.add(remove);
        }
        if (showHiddenFilesSwitch) {
            showHiddenFiles = new Checkbox(Messages.getString("AWTFileSelector.hiddentFiles"));             //$NON-NLS-1$
            showHiddenFiles.addItemListener(new ItemListener() {


                public void itemStateChanged(ItemEvent e) {
                    refresh();
                }

View Full Code Here


        tDestAlter = new TextField();


        tDestAlter.addActionListener(this);


        cTransfer = new Checkbox("Transfer to destination table", true);


        cTransfer.addItemListener(this);


        cDrop = new Checkbox("Drop destination table (ignore error)", true);


        cDrop.addItemListener(this);


        cCreate = new Checkbox("Create destination table", true);


        cCreate.addItemListener(this);


        cDropIndex = new Checkbox("Drop destination index (ignore error)",
                                  true);


        cDropIndex.addItemListener(this);


        cIdxForced = new Checkbox("force Idx_ prefix for indexes names",
                                  false);


        cIdxForced.addItemListener(this);


        cCreateIndex = new Checkbox("Create destination index", true);


        cCreateIndex.addItemListener(this);


        cDelete = new Checkbox("Delete rows in destination table", true);


        cDelete.addItemListener(this);


        cInsert = new Checkbox("Insert into destination", true);


        cInsert.addItemListener(this);


        cFKForced = new Checkbox("force FK_ prefix for foreign key names",
                                 false);


        cFKForced.addItemListener(this);


        cAlter = new Checkbox("Alter destination table", true);


        cAlter.addItemListener(this);
        p.add(createLabel("Source table"));
        p.add(tSourceTable);
        p.add(cTransfer);

View Full Code Here

        super(client);
    }


    public Object createComponentInstance(Object parent, DomNode element)
    {
        Checkbox chkbox = new Checkbox();
        return chkbox;
    }

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        return chkbox;
    }


    public Object updateUI(Object com, DomNode element)
    {
        Checkbox chkbox = (Checkbox) com;
        String label = (String) element.getAttribute("label");
        chkbox.setLabel(label);
        String state = element.getAttribute("state");
        if (state.equalsIgnoreCase("true"))
        {
            chkbox.setState(true);
        } else
        {
            chkbox.setState(false);
        }
        return com;
    }

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        handleEvent(e);
    }


    public void handleEvent(AWTEvent e)
    {
        Checkbox cb = (Checkbox) e.getSource();
        postEvent(e.getSource(), "true", false); //has event
        postEvent(e.getSource(), "-value", String.valueOf(cb.getState()), true);
    }

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    public void processInput(BridgeComponentPeer peer, BridgeInputContext context, Map inputForm)
    {
        //the checking
        if (hasEvent(peer, inputForm))
        {
            Checkbox cbox = (Checkbox) peer.getComponent();
            cbox.setState(!cbox.getState()); //toggle the checkbox
            postEvent(context, new ItemEvent(cbox, ItemEvent.ITEM_STATE_CHANGED, cbox, cbox.getState()
                    ? ItemEvent.SELECTED
                    : ItemEvent.DESELECTED));
        } else if (hasGroupEvent(peer, inputForm))
        {
            Checkbox cbox = (Checkbox) peer.getComponentObject();
            CheckboxGroup grp = cbox.getCheckboxGroup();
            /*
             * should not need to fire unselection Checkbox selected = grp.getSelectedCheckbox(); context.getEventQueue().postEvent(
             * new ItemEvent(selected, ItemEvent.ITEM_STATE_CHANGED, selected, ItemEvent.DESELECTED));
             */
            grp.setSelectedCheckbox(cbox);

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     * @param form the input form
     * @return true if there's group event
     */
    protected boolean hasGroupEvent(BridgePeer peer, Map form)
    {
        Checkbox cbox = (Checkbox) peer.getComponentObject();
        CheckboxGroup grp = cbox.getCheckboxGroup();
        if (grp != null)
        {
            //in a button group
            BridgeCheckboxGroupPeer grppeer = (BridgeCheckboxGroupPeer) peer.getBridgeToolkit().getContext().getPeer(grp);
            if (grppeer != null)

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    /**
     * {@inheritDoc}
     */
    public boolean hasEvent(BridgePeer peer, Map form)
    {
        Checkbox cbox = (Checkbox) peer.getComponentObject();
        if (super.hasEvent(peer, form))
        {
            Object value = form.get(peer.getId() + "-value");
            boolean b = value != null && (value.equals("1") || value.equals("true"));
            return cbox.getState() != b;
        }
        //if state is not the same - like a toggle
        //(only applies if the form is always submitted)
        return false;
    }

View Full Code Here

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