示例#1
0
  /**
   * Aligns the first <code>rows</code> * <code>cols</code> components of <code>parent</code> in a
   * grid. Each component in a column is as wide as the maximum preferred width of the components in
   * that column; height is similarly determined for each row. The parent is made just big enough to
   * fit them all.
   *
   * @param rows number of rows
   * @param cols number of columns
   * @param initialX x location to start the grid at
   * @param initialY y location to start the grid at
   * @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) {
      // System.err.println("The first argument to makeCompactGrid must use SpringLayout.");
      logger.log("The first argument to makeCompactGrid must use SpringLayout." + exc);
      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);
  }
示例#2
0
  /**
   * Aligns the first <code>rows</code> * <code>cols</code> components of <code>parent</code> in a
   * grid. Each component is as big as the maximum preferred width and height of the components. The
   * parent is made just big enough to fit them all.
   *
   * @param rows number of rows
   * @param cols number of columns
   * @param initialX x location to start the grid at
   * @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) {
      // System.err.println("The first argument to makeGrid must use SpringLayout.");
      logger.log("The first argument to makeGrid must use SpringLayout." + exc);
      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)));
  }