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

   * @param yPad
   *          y padding between cells
   */
  public static void makeCompactGrid(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 makeCompactGrid must use SpringLayout.");
      return;
    }


    // Align all cells in each column and make them the same width.
    Spring x = Spring.constant(initialX);
    for (int c = 0; c < cols; c++) {
      Spring width = Spring.constant(0);
      for (int r = 0; r < rows; r++) {
        width = Spring.max(width, getConstraintsForCell(r, c, parent, cols).getWidth());
      }
      for (int r = 0; r < rows; r++) {
        SpringLayout.Constraints constraints = getConstraintsForCell(r, c, parent, cols);
        constraints.setX(x);
        constraints.setWidth(width);
      }
      x = Spring.sum(x, Spring.sum(width, Spring.constant(xPad)));
    }


    // Align all cells in each row and make them the same height.
    Spring y = Spring.constant(initialY);
    for (int r = 0; r < rows; r++) {
      Spring height = Spring.constant(0);
      for (int c = 0; c < cols; c++) {
        height = Spring.max(height, getConstraintsForCell(r, c, parent, cols).getHeight());
      }
      for (int c = 0; c < cols; c++) {
        SpringLayout.Constraints constraints = getConstraintsForCell(r, c, parent, cols);
        constraints.setY(y);
        constraints.setHeight(height);
      }
      y = Spring.sum(y, Spring.sum(height, Spring.constant(yPad)));
    }


    // Set the parent's size.
    SpringLayout.Constraints pCons = layout.getConstraints(parent);
    pCons.setConstraint(SpringLayout.SOUTH, y);
    pCons.setConstraint(SpringLayout.EAST, x);
  }

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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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      e.printStackTrace();
    }
  }


  private void createGUI() {
    SpringLayout springLayout = new SpringLayout();
    getContentPane().setLayout(springLayout);


    JLabel label = new JLabel("MobWrite as a Collaborative Editor");
    label.setFont(new Font("SansSerif", Font.PLAIN, 18));
    springLayout.putConstraint(SpringLayout.NORTH, label, 10, SpringLayout.NORTH, getContentPane());
    springLayout.putConstraint(SpringLayout.WEST, label, 10, SpringLayout.WEST, getContentPane());
    springLayout.putConstraint(SpringLayout.EAST, label, -10, SpringLayout.EAST, getContentPane());
    getContentPane().add(label);


    demo_editor_title = new JTextField();
    springLayout.putConstraint(SpringLayout.NORTH, demo_editor_title, 6, SpringLayout.SOUTH, label);
    springLayout.putConstraint(SpringLayout.WEST, demo_editor_title, 10, SpringLayout.WEST, getContentPane());
    springLayout.putConstraint(SpringLayout.EAST, demo_editor_title, -10, SpringLayout.EAST, getContentPane());
    getContentPane().add(demo_editor_title);


    JScrollPane scrollPane = new JScrollPane();
    springLayout.putConstraint(SpringLayout.NORTH, scrollPane, 6, SpringLayout.SOUTH, demo_editor_title);
    springLayout.putConstraint(SpringLayout.WEST, scrollPane, 10, SpringLayout.WEST, getContentPane());
    springLayout.putConstraint(SpringLayout.EAST, scrollPane, -10, SpringLayout.EAST, getContentPane());
    springLayout.putConstraint(SpringLayout.SOUTH, scrollPane, -10, SpringLayout.SOUTH, getContentPane());
    getContentPane().add(scrollPane);


    demo_editor_text = new JTextArea();
    demo_editor_text.setLineWrap(true);
    demo_editor_text.setWrapStyleWord(true);

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     * @param initialY y location to start the grid at
     * @param xPad x padding between cells
     * @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) {
            Freedomotic.logger.warning("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),

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                lastCons.getConstraint(SpringLayout.EAST)));
    }


    /* 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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     * @param xPad x padding between cells
     * @param yPad y padding between cells
     */
    public static void makeCompactGrid(Container parent, int rows, int cols, int initialX, int initialY, int xPad,
            int yPad) {
        SpringLayout layout;


        try {
            layout = (SpringLayout) parent.getLayout();
        } catch (ClassCastException exc) {
            Freedomotic.logger.warning("The first argument to makeCompactGrid must use SpringLayout.");


            return;
        }


        //Align all cells in each column and make them the same width.
        Spring x = Spring.constant(initialX);


        for (int c = 0; c < cols; c++) {
            Spring width = Spring.constant(0);


            for (int r = 0; r < rows; r++) {
                width =
                        Spring.max(width,
                        getConstraintsForCell(r, c, parent, cols).getWidth());
            }


            for (int r = 0; r < rows; r++) {
                SpringLayout.Constraints constraints = getConstraintsForCell(r, c, parent, cols);
                constraints.setX(x);
                constraints.setWidth(width);
            }


            x = Spring.sum(x,
                    Spring.sum(width,
                    Spring.constant(xPad)));
        }


        //Align all cells in each row and make them the same height.
        Spring y = Spring.constant(initialY);


        for (int r = 0; r < rows; r++) {
            Spring height = Spring.constant(0);


            for (int c = 0; c < cols; c++) {
                height =
                        Spring.max(height,
                        getConstraintsForCell(r, c, parent, cols).getHeight());
            }


            for (int c = 0; c < cols; c++) {
                SpringLayout.Constraints constraints = getConstraintsForCell(r, c, parent, cols);
                constraints.setY(y);
                constraints.setHeight(height);
            }


            y = Spring.sum(y,
                    Spring.sum(height,
                    Spring.constant(yPad)));
        }


        //Set the parent's size.
        SpringLayout.Constraints pCons = layout.getConstraints(parent);
        pCons.setConstraint(SpringLayout.SOUTH, y);
        pCons.setConstraint(SpringLayout.EAST, x);
    }

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        this.setVisible(true);
        this.setPreferredSize(new Dimension(500, 500));
        this.rows = rows;
        this.cols = cols;
        table = new ArrayList<Component>();
        this.setLayout(new SpringLayout());
    }

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        cmbCategory.setEnabled(!isActive);
    }


    public final void retrievePlugins(final IPluginCategory category) {
        politeWaitingMessage(true);
        pnlMain.setLayout(new SpringLayout());
        pnlMain.removeAll();
        pnlMain.setBackground(Color.white);
        pnlMain.repaint();
        EventQueue.invokeLater(new Runnable() {
            @Override

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     */
    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) {
            Freedomotic.logger.warning("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,

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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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