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

      pref = Math.max((int) v.getPreferredSpan(axis), pref);
      max = Math.max((int) v.getMaximumSpan(axis), max);
  }


  if (r == null) {
      r = new SizeRequirements();
      r.alignment = 0.5f;
  }
  r.preferred = (int) pref;
  r.minimum = min;
  r.maximum = max;

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     * @param r the <code>SizeRequirements</code> object;
     *    if <code>null</code> one will be created
     * @return the newly initialized <code>SizeRequirements</code> object
     */
    protected SizeRequirements baselineRequirements(int axis, SizeRequirements r) {
        SizeRequirements totalAscent = new SizeRequirements();
        SizeRequirements totalDescent = new SizeRequirements();
        
        if (r == null) {
            r = new SizeRequirements();
        }
        
        r.alignment = 0.5f;


        int n = getViewCount();

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        };
    }


    public void testCalculateMinorAxisRequirements01() {
        view = new ParagraphViewImpl(doc.getParagraphElement(10), factory);
        SizeRequirements sr =
            view.calculateMinorAxisRequirements(View.X_AXIS, null);
        assertEquals(4 * CHAR_WIDTH, sr.minimum);
        assertEquals((isHarmony() ? 13 : 12) * CHAR_WIDTH, sr.preferred);
        assertEquals(Integer.MAX_VALUE, sr.maximum);
    }

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        assertEquals(Integer.MAX_VALUE, sr.maximum);
    }


    public void testCalculateMinorAxisRequirements02() throws Exception {
        view = new ParagraphViewImpl(doc.getParagraphElement(20), factory);
        SizeRequirements sr =
            view.calculateMinorAxisRequirements(View.X_AXIS, null);
        assertEquals(8 * CHAR_WIDTH, sr.minimum);
        assertEquals((isHarmony() ? 14 : 13) * CHAR_WIDTH, sr.preferred);
        assertEquals(Integer.MAX_VALUE, sr.maximum);
    }

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                result.setGlyphPainter(BlockViewTest.InlineViewFactory.painter);
                return result;
            }
        };
        view = new ParagraphViewImpl(doc.getParagraphElement(10), factory);
        SizeRequirements sr =
            view.calculateMinorAxisRequirements(View.X_AXIS, null);


        final View layoutPool = ((ParagraphViewImpl)view).getLayoutPool();
        int min = 0;
        int pref = 0;

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                };
                return result;
            }
        };
        view = new ParagraphViewImpl(doc.getParagraphElement(10), factory);
        SizeRequirements sr =
            view.calculateMinorAxisRequirements(View.X_AXIS, null);
        assertEquals(8 * CHAR_WIDTH, sr.minimum);
        assertEquals(13 * CHAR_WIDTH, sr.preferred);
        assertEquals(Integer.MAX_VALUE, sr.maximum);
    }

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    protected void tearDown() throws Exception {
        super.tearDown();
    }


    public void testCalculateAlignedPositions() {
        SizeRequirements total = new SizeRequirements(100, 100, Integer.MAX_VALUE, 0.5f);
        SizeRequirements[] children = new SizeRequirements[] {
                new SizeRequirements(25, 25, 25, 0.5f), new SizeRequirements(50, 50, 50, 0.5f) };
        int[] offsets = new int[children.length];
        int[] spans = new int[children.length];
        SizeRequirementsHelper.calculateAlignedPositions(100, total, children, offsets, spans);
        assertEquals(38, offsets[0]);
        assertEquals(25, offsets[1]);
        assertEquals(25, spans[0]);
        assertEquals(50, spans[1]);
        total = new SizeRequirements(100, 1000, Integer.MAX_VALUE, 0.5f);
        children = new SizeRequirements[] { new SizeRequirements(50, 50, 250, 0.5f),
                new SizeRequirements(100, 100, 500, 0.5f) };
        offsets = new int[children.length];
        spans = new int[children.length];
        SizeRequirementsHelper.calculateAlignedPositions(200, total, children, offsets, spans);
        assertEquals(0, offsets[0]);
        assertEquals(0, offsets[1]);

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            @Override
            public float getAlignment(int axis) {
                return axis == X_AXIS ? 0.312f : 0.213f;
            }
        };
        SizeRequirements xSR = view.calculateMinorAxisRequirements(View.X_AXIS, null);
        assertEquals(-19, xSR.minimum);
        assertEquals(-13, xSR.preferred);
        assertEquals(Integer.MAX_VALUE, xSR.maximum);
        assertEquals(0.5f, xSR.alignment, 1e-5f);
        SizeRequirements ySR = view.calculateMinorAxisRequirements(View.Y_AXIS, xSR);
        assertSame(xSR, ySR);
        assertEquals(7, xSR.minimum);
        assertEquals(13, xSR.preferred);
        assertEquals(Integer.MAX_VALUE, xSR.maximum);
        assertEquals(0.5f, xSR.alignment, 1e-5f);

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        view = new ListViewImpl(listU);


        assertEquals(0.5f, view.getAlignment(View.X_AXIS), 0);
        assertEquals(0.5f, view.getAlignment(View.Y_AXIS), 0);


        SizeRequirements r = view.calculateMajorAxisRequirements(View.Y_AXIS,
                                                                 null);
        assertEquals(0.5f, r.alignment, 0);


        r = view.calculateMajorAxisRequirements(View.X_AXIS, r);
        assertEquals(0.5f, r.alignment, 0);

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        view = new BlockViewImpl(block, Y_AXIS);


        assertEquals(0, view.getAlignment(X_AXIS), 0);
        assertEquals(0, view.getAlignment(Y_AXIS), 0);


        SizeRequirements r = view.calculateMajorAxisRequirements(Y_AXIS, null);
        assertEquals(0.5f, r.alignment, 0);


        r = view.calculateMajorAxisRequirements(X_AXIS, r);
        assertEquals(0.5f, r.alignment, 0);
    }

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