Examples of javax.swing.SizeRequirements

javax.swing.SizeRequirements
For the convenience of layout managers, calculates information about the size and position of components. All size and position calculation methods are class methods that take arrays of SizeRequirements as arguments. The SizeRequirements class supports two types of layout:

tiled
The components are placed end-to-end, starting either at coordinate 0 (the leftmost or topmost position) or at the coordinate representing the end of the allocated span (the rightmost or bottommost position).
aligned
The components are aligned as specified by each component's X or Y alignment value.

Each SizeRequirements object contains information about either the width (and X alignment) or height (and Y alignment) of a single component or a group of components:

minimum
The smallest reasonable width/height of the component or component group, in pixels.
preferred
The natural width/height of the component or component group, in pixels.
maximum
The largest reasonable width/height of the component or component group, in pixels.
alignment
The X/Y alignment of the component or component group.

Warning: Serialized objects of this class will not be compatible with future Swing releases. The current serialization support is appropriate for short term storage or RMI between applications running the same version of Swing. As of 1.4, support for long term storage of all JavaBeans™ has been added to the java.beans package. Please see {@link java.beans.XMLEncoder}. @see Component#getMinimumSize @see Component#getPreferredSize @see Component#getMaximumSize @see Component#getAlignmentX @see Component#getAlignmentY @author Timothy Prinzing

   *
   * @param harness the test harness to use
   */
  private void test1(TestHarness harness)
  {
    SizeRequirements req1 = new SizeRequirements(282, 282, 282, 0.5F);
    SizeRequirements req2 = new SizeRequirements(599, 599, 2147483647, 0.5F);
    SizeRequirements[] els = new SizeRequirements[]{req1, req2};
    // Only the alignment field of total is used.
    SizeRequirements total = SizeRequirements.getAlignedSizeRequirements(els);
    int[] offsets = new int[2];
    int[] spans = new int[2];
    SizeRequirements.calculateAlignedPositions(112, total, els, offsets, spans);
    harness.check(offsets[0], 0);
    harness.check(offsets[1], 0);

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              return new ParagraphView(e) {
                @Override
                protected SizeRequirements calculateMinorAxisRequirements(
                    int axis, SizeRequirements r) {
                  if (r == null) {
                    r = new SizeRequirements();
                  }
                  float pref = layoutPool
                      .getPreferredSpan(axis);
                  float min = layoutPool.getMinimumSpan(axis);
                  // Don't include insets, Box.getXXXSpan will

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        }


        protected SizeRequirements
            calculateMinorAxisRequirements(final int axis,
                                           final SizeRequirements r) {
            SizeRequirements result = super.calculateMinorAxisRequirements(axis,
                                                                           r);
            // This view is not resizable along Y (minor axis)
            result.maximum = result.preferred;
            return result;
        }

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        protected SizeRequirements
            calculateMajorAxisRequirements(final int axis,
                                           final SizeRequirements r) {


            SizeRequirements result =
                super.calculateMajorAxisRequirements(axis, r);
            result.alignment = getAlignByJustification();
            return result;
        }

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        protected SizeRequirements
            calculateMinorAxisRequirements(final int axis,
                                           final SizeRequirements r) {


            SizeRequirements result = baselineRequirements(axis, r);
            lineSpace = (int)(result.preferred * lineSpacing);
            return result;
        }

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    }


    public int getResizeWeight(final int axis) {
        isAxisValid(axis);


        final SizeRequirements sr = getTotalRequirements(axis);
        return sr.minimum == sr.maximum ? 0 : 1;
    }

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        return SizeRequirementsHelper.getTiledSizeRequirements(sr, r);
    }


    protected SizeRequirements calculateMinorAxisRequirements(final int axis,
            final SizeRequirements r)  {
        final SizeRequirements result = r != null ? r : new SizeRequirements();
        final SizeRequirements[] children = getRequirements(axis);


        int min  = 0;
        int pref = 0;

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                                  final int axis) {
        for (int i = 0; i < getViewCount(); i++) {
            View child = getView(i);


            if (requirements[i] == null) {
                requirements[i] = new SizeRequirements();
            }


            requirements[i].minimum   = (int)child.getMinimumSpan(axis);
            requirements[i].preferred = (int)child.getPreferredSpan(axis);
            requirements[i].maximum   = (int)child.getMaximumSpan(axis);

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    }


    protected SizeRequirements
        calculateMinorAxisRequirements(final int axis,
                                       final SizeRequirements sr) {
        SizeRequirements result = sr != null ? sr : new SizeRequirements();
        result.minimum = (int)layoutPool.getMinimumSpan(axis);
        result.preferred = (int)layoutPool.getPreferredSpan(axis);
        result.maximum = Integer.MAX_VALUE;
        result.alignment = ALIGN_CENTER;
        return result;

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     */
    public static SizeRequirements
        getTiledSizeRequirements(final SizeRequirements[] children,
                                 final SizeRequirements sr) {


        SizeRequirements result = (sr != null) ? sr : new SizeRequirements();
        result.minimum   = 0;
        result.preferred = 0;
        result.maximum   = 0;
        result.alignment = 0.5f;

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