Examples of javax.swing.SpringLayout$SpringProxy

javax.swing.SpringLayout
A Constraints object holds the constraints that govern the way a component's size and position change in a container controlled by a SpringLayout. A Constraints object is like a Rectangle, in that it has x, y, width, and height properties. In the Constraints object, however, these properties have Spring values instead of integers. In addition, a Constraints object can be manipulated as four edges -- north, south, east, and west -- using the constraint property.
The following formulas are always true for a Constraints object (here WEST and x are synonyms, as are and NORTH and y):
```
 EAST = WEST + WIDTH SOUTH = NORTH + HEIGHT HORIZONTAL_CENTER = WEST + WIDTH/2 VERTICAL_CENTER = NORTH + HEIGHT/2 ABSOLUTE_BASELINE = NORTH + RELATIVE_BASELINE 
```
For example, if you have specified the WIDTH and WEST (X) location the EAST is calculated as WEST + WIDTH. If you instead specified the WIDTH and EAST locations the WEST (X) location is then calculated as EAST - WIDTH.
[RELATIVE_BASELINE is a private constraint that is set automatically when the SpringLayout.Constraints(Component) constructor is called or when a constraints object is registered with a SpringLayout object.]
Note: In this document, operators represent methods in the Spring class. For example, "a + b" is equal to Spring.sum(a, b), and "a - b" is equal to Spring.sum(a, Spring.minus(b)). See the {@link Spring Spring API documentation}for further details of spring arithmetic.
Because a Constraints object's properties -- representing its edges, size, and location -- can all be set independently and yet are interrelated, a Constraints object can become over-constrained. For example, if the WEST, WIDTH and EAST edges are all set, steps must be taken to ensure that the first of the formulas above holds. To do this, the Constraints object throws away the least recently set constraint so as to make the formulas hold. @since 1.4


    add(panelA, "A");


    JPanel panel = new JPanel();


    SpringLayout layout = new SpringLayout();
    panel.setLayout(layout);


    layout.putConstraint(NORTH, lblRefresh, 5, NORTH, panel);
    layout.putConstraint(NORTH, spnRefresh, 5, SOUTH, lblRefresh);
    layout.putConstraint(NORTH, lblSeconds, 5, SOUTH, spnRefresh);
    layout.putConstraint(NORTH, lblRules, 5, SOUTH, lblSeconds);
    layout.putConstraint(NORTH, scrollRules, 5, SOUTH, lblRules);
    layout.putConstraint(SOUTH, scrollRules, -5, NORTH, btnAddRule);
    layout.putConstraint(SOUTH, btnAddRule, -5, SOUTH, panel);
    layout.putConstraint(SOUTH, btnRemoveRule, -5, SOUTH, panel);


    layout.putConstraint(WEST, lblRefresh, 5, WEST, panel);
    layout.putConstraint(WEST, spnRefresh, 5, WEST, panel);
    layout.putConstraint(WEST, lblSeconds, 5, WEST, panel);
    layout.putConstraint(WEST, lblRules, 5, WEST, panel);
    layout.putConstraint(WEST, scrollRules, 5, WEST, panel);
    layout.putConstraint(EAST, scrollRules, -5, EAST, panel);
    layout.putConstraint(WEST, btnAddRule, 5, WEST, panel);
    layout.putConstraint(WEST, btnRemoveRule, 5, EAST, btnAddRule);


    panel.add(lblRefresh);
    panel.add(spnRefresh);
    panel.add(lblSeconds);
    panel.add(lblRules);

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    previewTextField.setFont(font);
  }


  private void defineLayout() {
    Container container = getContentPane();
    SpringLayout layout = new SpringLayout();
    container.setLayout(layout);


    JLabel fontLabel = new JLabel(Translator.tr("Font family"));
    JLabel sizeLabel = new JLabel(Translator.tr("Font size"));
    JLabel previewLabel = new JLabel(Translator.tr("Preview"));


    container.add(fontLabel);
    container.add(fontFamilyCombo);
    container.add(sizeLabel);
    container.add(fontSizeCombo);
    container.add(previewLabel);
    container.add(previewTextField);


    previewTextField.setPreferredSize(new Dimension(300, 100));


    container.add(okButton);
    container.add(cancelButton);


    layout.putConstraint(SpringLayout.WEST, fontLabel, 5, SpringLayout.WEST,
        container);
    layout.putConstraint(SpringLayout.WEST, fontFamilyCombo, 5,
        SpringLayout.WEST, container);
    layout.putConstraint(SpringLayout.WEST, sizeLabel, 5, SpringLayout.WEST,
        container);
    layout.putConstraint(SpringLayout.WEST, fontSizeCombo, 5, SpringLayout.WEST,
        container);
    layout.putConstraint(SpringLayout.WEST, previewLabel, 5, SpringLayout.WEST,
        container);
    layout.putConstraint(SpringLayout.WEST, previewTextField, 5, SpringLayout.WEST,
        container);
    layout.putConstraint(SpringLayout.EAST, okButton, -5, SpringLayout.WEST,
        cancelButton);
    layout.putConstraint(SpringLayout.EAST, cancelButton, -5,
        SpringLayout.EAST, container);


    layout.putConstraint(SpringLayout.NORTH, fontLabel, 5, SpringLayout.NORTH,
        container);
    layout.putConstraint(SpringLayout.NORTH, fontFamilyCombo, 5,
        SpringLayout.SOUTH, fontLabel);
    layout.putConstraint(SpringLayout.NORTH, sizeLabel, 5, SpringLayout.SOUTH,
        fontFamilyCombo);
    layout.putConstraint(SpringLayout.NORTH, fontSizeCombo, 5, SpringLayout.SOUTH,
        sizeLabel);
    layout.putConstraint(SpringLayout.NORTH, previewLabel, 5, SOUTH, fontSizeCombo);
    layout.putConstraint(SpringLayout.NORTH, previewTextField, 5, SOUTH, previewLabel);
    layout.putConstraint(SpringLayout.NORTH, okButton, 15, SpringLayout.SOUTH,
        previewTextField);
    layout.putConstraint(SpringLayout.NORTH, cancelButton, 15,
        SpringLayout.SOUTH, previewTextField);


    Constraints containerCons = layout.getConstraints(container);
    Constraints fontCons = layout.getConstraints(previewTextField);
    Constraints okCons = layout.getConstraints(okButton);


    containerCons.setWidth(Spring.sum(Spring.constant(5),
        fontCons.getConstraint(EAST)));
    containerCons.setHeight(Spring.sum(Spring.constant(5),
        okCons.getConstraint(SOUTH)));

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  }


  private void placeComponents() {
    JLabel lblTypes = new JLabel(Translator.tr("Log types"));


    SpringLayout layout = new SpringLayout();
    setLayout(layout);


    layout.putConstraint(NORTH, lblTypes, 5, NORTH, this);
    layout.putConstraint(NORTH, scrollTypes, 5, SOUTH, lblTypes);
    layout.putConstraint(NORTH, btnAdd, 5, SOUTH, scrollTypes);
    layout.putConstraint(NORTH, btnRename, 5, SOUTH, btnAdd);
    layout.putConstraint(NORTH, btnRemove, 5, SOUTH, btnRename);


    layout.putConstraint(WEST, lblTypes, 5, WEST, this);
    layout.putConstraint(WEST, scrollTypes, 5, WEST, this);
    layout.putConstraint(EAST, scrollTypes, -5, EAST, this);
    layout.putConstraint(WEST, btnAdd, 5, WEST, this);
    layout.putConstraint(EAST, btnAdd, -5, EAST, this);
    layout.putConstraint(WEST, btnRename, 5, WEST, this);
    layout.putConstraint(EAST, btnRename, -5, EAST, this);
    layout.putConstraint(WEST, btnRemove, 5, WEST, this);
    layout.putConstraint(EAST, btnRemove, -5, EAST, this);


    add(lblTypes);
    add(scrollTypes);
    add(btnAdd);
    add(btnRename);

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    defineLayout();
  }


  private void defineLayout() {
    Container container = getContentPane();
    SpringLayout layout = new SpringLayout();
    container.setLayout(layout);


    JLabel _lookAndFeel = new JLabel(Translator.tr("Look and feel"));
    JLabel _language = new JLabel(Translator.tr("Language"));


    container.add(_lookAndFeel);
    container.add(lookAndFeelComboBox);


    if (languageComboBox.getModel().getSize() > 0) {
      container.add(_language);
      container.add(languageComboBox);
    }


    container.add(okButton);
    container.add(cancelButton);


    layout.putConstraint(SpringLayout.WEST, _lookAndFeel, 5,
        SpringLayout.WEST, container);
    layout.putConstraint(SpringLayout.WEST, lookAndFeelComboBox, 5,
        SpringLayout.WEST, container);
    layout.putConstraint(SpringLayout.WEST, _language, 5,
        SpringLayout.WEST, container);
    layout.putConstraint(SpringLayout.WEST, languageComboBox, 5,
        SpringLayout.WEST, container);
    layout.putConstraint(SpringLayout.EAST, okButton, -5, SpringLayout.WEST,
        cancelButton);
    layout.putConstraint(SpringLayout.EAST, cancelButton, -5,
        SpringLayout.EAST, container);


    layout.putConstraint(SpringLayout.NORTH, _lookAndFeel, 5,
        SpringLayout.NORTH, container);
    layout.putConstraint(SpringLayout.NORTH, lookAndFeelComboBox, 5,
        SpringLayout.SOUTH, _lookAndFeel);
    layout.putConstraint(SpringLayout.NORTH, _language, 5,
        SpringLayout.SOUTH, lookAndFeelComboBox);
    layout.putConstraint(SpringLayout.NORTH, languageComboBox, 5,
        SpringLayout.SOUTH, _language);
    layout.putConstraint(SpringLayout.NORTH, okButton, 15, SpringLayout.SOUTH,
        languageComboBox);
    layout.putConstraint(SpringLayout.NORTH, cancelButton, 15,
        SpringLayout.SOUTH, languageComboBox);


    Constraints containerCons = layout.getConstraints(container);
    Constraints okCons = layout.getConstraints(okButton);


    containerCons.setWidth(Spring.constant(270));
    containerCons.setHeight(Spring.sum(Spring.constant(5),
        okCons.getConstraint(SOUTH)));

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        // ROTATION PANEL
        rotationPanel.setBorder(BorderFactory.createTitledBorder(GettextResource.gettext(
                config.getI18nResourceBundle(), "Rotation")));
        rotationPanel.setPreferredSize(new Dimension(200, 95));
        rotationPanel.setMinimumSize(new Dimension(160, 90));
        rotationPanelLayout = new SpringLayout();
        rotationPanel.setLayout(rotationPanelLayout);


        rotationBox = new JComboBox();
        rotationBox.addItem("90");
        rotationBox.addItem("180");
        rotationBox.addItem("270");
        rotationPagesBox = new JComboBox();
        rotationPagesBox.addItem(new StringItem(ValidationUtility.ALL_STRING, GettextResource.gettext(config
                .getI18nResourceBundle(), "All")));
        rotationPagesBox.addItem(new StringItem(ValidationUtility.EVEN_STRING, GettextResource.gettext(config
                .getI18nResourceBundle(), "Even")));
        rotationPagesBox.addItem(new StringItem(ValidationUtility.ODD_STRING, GettextResource.gettext(config
                .getI18nResourceBundle(), "Odd")));


        rotateComboLabel.setText(GettextResource.gettext(config.getI18nResourceBundle(),
                "Clockwise rotation (degrees):"));
        rotatePagesComboLabel.setText(GettextResource.gettext(config.getI18nResourceBundle(), "Pages:"));


        StringBuffer sb1 = new StringBuffer();
        sb1.append("<html><body><b>" + GettextResource.gettext(config.getI18nResourceBundle(), "Rotation") + "</b>");
        sb1.append("<p> "
                + GettextResource.gettext(config.getI18nResourceBundle(), "Set the rotation degrees (clockwise).")
                + "</p>");
        sb1.append("<p> "
                + GettextResource.gettext(config.getI18nResourceBundle(), "Set the pages that will be rotated.")
                + "</p>");
        sb1.append("</body></html>");
        rotateHelpLabel = new JHelpLabel(sb1.toString(), true);


        rotationPanel.add(rotateHelpLabel);
        rotationPanel.add(rotateComboLabel);
        rotationPanel.add(rotationBox);
        rotationPanel.add(rotatePagesComboLabel);
        rotationPanel.add(rotationPagesBox);
        rotationPanel.add(rotateHelpLabel);


        topConst.fill = GridBagConstraints.HORIZONTAL;
        topConst.weightx = 0.0;
        topConst.weighty = 0.0;
        topConst.gridwidth = 3;
        topConst.gridheight = 1;
        topConst.gridx = 0;
        topConst.gridy = 1;
        topPanel.add(rotationPanel, topConst);


        // DESTINATION_PANEL
        destinationPanelLayout = new SpringLayout();
        destinationPanel.setLayout(destinationPanelLayout);
        TitledBorder titledBorder = BorderFactory.createTitledBorder(GettextResource.gettext(config
                .getI18nResourceBundle(), "Destination folder"));
        destinationPanel.setBorder(titledBorder);
        destinationPanel.setPreferredSize(new Dimension(200, 160));
        destinationPanel.setMinimumSize(new Dimension(160, 150));


        // END_DESTINATION_PANEL


        destinationPanel.add(destinationTextField);
        topConst.fill = GridBagConstraints.HORIZONTAL;
        topConst.weightx = 0.0;
        topConst.weighty = 0.0;
        topConst.gridwidth = 3;
        topConst.gridheight = 1;
        topConst.gridx = 0;
        topConst.gridy = 2;
        topPanel.add(destinationPanel, topConst);


        GridBagConstraints c = new GridBagConstraints();
        c.fill = GridBagConstraints.BOTH;
        c.ipady = 5;
        c.weightx = 1.0;
        c.weighty = 1.0;
        c.gridwidth = 3;
        c.gridx = 0;
        c.gridy = 0;
        add(topPanel, c);
        // BROWSE_BUTTON
        browseButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                JFileChooser fileChooser = SharedJFileChooser.getInstance(SharedJFileChooserType.NO_FILTER,
                        JFileChooser.DIRECTORIES_ONLY, destinationTextField.getText());
                if (fileChooser.showOpenDialog(browseButton.getParent()) == JFileChooser.APPROVE_OPTION) {
                    File chosenFile = fileChooser.getSelectedFile();
                    if (chosenFile != null) {
                        destinationTextField.setText(chosenFile.getAbsolutePath());
                    }


                }
            }
        });
        destinationPanel.add(browseButton);
        // END_BROWSE_BUTTON


        overwriteCheckbox.setSelected(true);
        destinationPanel.add(overwriteCheckbox);


        outputCompressedCheck.addItemListener(new CompressCheckBoxItemListener(versionCombo));
        outputCompressedCheck.setSelected(true);


        destinationPanel.add(outputCompressedCheck);
        destinationPanel.add(versionCombo);
        destinationPanel.add(outputVersionLabel);


        // HELP_LABEL_DESTINATION
        String helpTextDest = "<html><body><b>"
                + GettextResource.gettext(Configuration.getInstance().getI18nResourceBundle(),
                        "Destination output directory")
                + "</b>"
                + "<p>"
                + GettextResource.gettext(Configuration.getInstance().getI18nResourceBundle(),
                        "To choose a folder browse or enter the full path to the destination output directory.")
                + "</p>"
                + "<p>"
                + GettextResource.gettext(Configuration.getInstance().getI18nResourceBundle(),
                        "Check the box if you want to overwrite the output files if they already exist.")
                + "</p>"
                + "<p>"
                + GettextResource.gettext(Configuration.getInstance().getI18nResourceBundle(),
                        "Check the box if you want compressed output files.")
                + " "
                + GettextResource.gettext(Configuration.getInstance().getI18nResourceBundle(),
                        "PDF version 1.5 or above.")
                + "</p>"
                + "<p>"
                + GettextResource.gettext(Configuration.getInstance().getI18nResourceBundle(),
                        "Set the pdf version of the ouput document.") + "</p>" + "</body></html>";
        destinationHelpLabel = new JHelpLabel(helpTextDest, true);
        destinationPanel.add(destinationHelpLabel);
        // END_HELP_LABEL_DESTINATION
        outputOptionsPanel.setBorder(BorderFactory.createTitledBorder(GettextResource.gettext(config
                .getI18nResourceBundle(), "Output options")));
        outputOptionsPanel.setPreferredSize(new Dimension(200, 55));
        outputOptionsPanel.setMinimumSize(new Dimension(160, 50));
        outputOptionsPanelLayout = new SpringLayout();
        outputOptionsPanel.setLayout(outputOptionsPanelLayout);


        outPrefixLabel.setText(GettextResource.gettext(config.getI18nResourceBundle(), "Output file names prefix:"));
        outputOptionsPanel.add(outPrefixLabel);

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    final Caption labelInputDir = new Caption("Input Directory: ");
    final Caption labelStyleMapFile = new Caption("TypeSystem or AE Descriptor File: ");


    JPanel controlPanel = new JPanel();
    controlPanel.setBorder(BorderFactory.createEmptyBorder(4, 4, 4, 4));
    controlPanel.setLayout(new SpringLayout());


    // Once we add components to controlPanel, we'll
    // call SpringUtilities::makeCompactGrid on it.


    // controlPanel.setLayout(new GridLayout(4, 2, 8, 4));

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    JPanel southernPanel = new JPanel();
    southernPanel.setLayout(new BoxLayout(southernPanel, BoxLayout.Y_AXIS));


    JPanel controlsPanel = new JPanel();
    controlsPanel.setLayout(new SpringLayout());


    Caption displayFormatLabel = new Caption("Results Display Format:");
    controlsPanel.add(displayFormatLabel);


    JPanel displayFormatPanel = new JPanel();

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    labelEncoding = new Caption("Character Encoding: ");


    JPanel controlPanel = new JPanel();
    controlPanel.setBorder(BorderFactory.createEmptyBorder(4, 4, 4, 4));
    controlPanel.setLayout(new SpringLayout());


    // Once we add components to controlPanel, we'll
    // call SpringUtilities::makeCompactGrid on it.


    // controlPanel.setLayout(new GridLayout(4, 2, 8, 4));

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   * @param yPad
   *          y padding between cells
   */
  public static void makeGrid(Container parent, int rows, int cols, int initialX, int initialY,
          int xPad, int yPad) {
    SpringLayout layout;
    try {
      layout = (SpringLayout) parent.getLayout();
    } catch (ClassCastException exc) {
      System.err.println("The first argument to makeGrid must use SpringLayout.");
      return;
    }


    Spring xPadSpring = Spring.constant(xPad);
    Spring yPadSpring = Spring.constant(yPad);
    Spring initialXSpring = Spring.constant(initialX);
    Spring initialYSpring = Spring.constant(initialY);
    int max = rows * cols;


    // Calculate Springs that are the max of the width/height so that all
    // cells have the same size.
    Spring maxWidthSpring = layout.getConstraints(parent.getComponent(0)).getWidth();
    Spring maxHeightSpring = layout.getConstraints(parent.getComponent(0)).getWidth();
    for (int i = 1; i < max; i++) {
      SpringLayout.Constraints cons = layout.getConstraints(parent.getComponent(i));


      maxWidthSpring = Spring.max(maxWidthSpring, cons.getWidth());
      maxHeightSpring = Spring.max(maxHeightSpring, cons.getHeight());
    }


    // Apply the new width/height Spring. This forces all the
    // components to have the same size.
    for (int i = 0; i < max; i++) {
      SpringLayout.Constraints cons = layout.getConstraints(parent.getComponent(i));


      cons.setWidth(maxWidthSpring);
      cons.setHeight(maxHeightSpring);
    }


    // Then adjust the x/y constraints of all the cells so that they
    // are aligned in a grid.
    SpringLayout.Constraints lastCons = null;
    SpringLayout.Constraints lastRowCons = null;
    for (int i = 0; i < max; i++) {
      SpringLayout.Constraints cons = layout.getConstraints(parent.getComponent(i));
      if (i % cols == 0) { // start of new row
        lastRowCons = lastCons;
        cons.setX(initialXSpring);
      } else { // x position depends on previous component
        cons.setX(Spring.sum(lastCons.getConstraint(SpringLayout.EAST), xPadSpring));
      }


      if (i / cols == 0) { // first row
        cons.setY(initialYSpring);
      } else { // y position depends on previous row
        cons.setY(Spring.sum(lastRowCons.getConstraint(SpringLayout.SOUTH), yPadSpring));
      }
      lastCons = cons;
    }


    // Set the parent's size.
    SpringLayout.Constraints pCons = layout.getConstraints(parent);
    pCons.setConstraint(SpringLayout.SOUTH, Spring.sum(Spring.constant(yPad), lastCons
            .getConstraint(SpringLayout.SOUTH)));
    pCons.setConstraint(SpringLayout.EAST, Spring.sum(Spring.constant(xPad), lastCons
            .getConstraint(SpringLayout.EAST)));
  }

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  }


  /* Used by makeCompactGrid. */
  private static SpringLayout.Constraints getConstraintsForCell(int row, int col, Container parent,
          int cols) {
    SpringLayout layout = (SpringLayout) parent.getLayout();
    Component c = parent.getComponent(row * cols + col);
    return layout.getConstraints(c);
  }

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