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

        view = new BlockViewImpl(block, Y_AXIS);


        assertEquals(1, view.getResizeWeight(X_AXIS));
        assertEquals(isHarmony() ? 1 : 0, view.getResizeWeight(Y_AXIS));


        SizeRequirements r = view.calculateMajorAxisRequirements(Y_AXIS, null);
        assertEquals(44, r.minimum);
        assertEquals(400, r.maximum);
        assertEquals(44, (int)view.getMinimumSpan(Y_AXIS));
        assertEquals(400, (int)view.getMaximumSpan(Y_AXIS));
    }

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        view.setParent(null);
        assertFalse(propertiesMarker.isOccurred());
    }


    public void testCalculateMajorAxisRequirements() {
        SizeRequirements r = view.calculateMajorAxisRequirements(Y_AXIS, null);
        assertEquals(r.preferred, r.minimum);
        assertEquals(0, r.preferred);
        assertEquals(0, r.maximum);


        doc.getStyleSheet().addRule("p {width: 305pt}");
        view.setPropertiesFromAttributes();
        SizeRequirements sr = view.calculateMajorAxisRequirements(Y_AXIS, r);
        assertSame(r, sr);
        assertEquals(0, r.minimum);
        assertEquals(0, r.preferred);
        assertEquals(0, r.maximum);

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        assertEquals(400, maxSpan);




        doc.getStyleSheet().addRule("p {height: 45pt}");
        view.setPropertiesFromAttributes();
        SizeRequirements r = view.calculateMajorAxisRequirements(Y_AXIS, null);
        assertEquals(44, r.minimum); // 45 - 15 def. margin = 30 < 44
        assertEquals(isHarmony() ? 112 : 44, r.preferred);
        assertEquals(400, r.maximum);


        doc.getStyleSheet().addRule("p {height: 60pt}");

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        assertEquals(45, r.preferred);
        assertEquals(45, r.maximum);
    }


    public void testCalculateMinorAxisRequirements() {
        SizeRequirements r = view.calculateMinorAxisRequirements(X_AXIS, null);
        assertEquals(r.preferred, r.minimum);
        assertEquals((int)getMaxChildSpan(X_AXIS), r.preferred);
        assertEquals(Integer.MAX_VALUE, r.maximum);


        doc.getStyleSheet().addRule("p {height: 40pt}");
        view.setPropertiesFromAttributes();
        SizeRequirements sr = view.calculateMinorAxisRequirements(X_AXIS, r);
        assertSame(r, sr);
        assertEquals(r.preferred, r.minimum);
        assertEquals((int)getMaxChildSpan(X_AXIS), r.preferred);
        assertEquals(Integer.MAX_VALUE, r.maximum);

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        assertEquals(100, prefSpan);




        doc.getStyleSheet().addRule("p {width: 46pt}");
        view.setPropertiesFromAttributes();
        SizeRequirements r = view.calculateMinorAxisRequirements(X_AXIS, null);
        assertEquals(50, r.minimum);
        assertEquals(isHarmony() ? 100 : 50, r.preferred);
        assertEquals(Integer.MAX_VALUE, r.maximum);


        doc.getStyleSheet().addRule("p {width: 146pt}");

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        assertEquals(146, r.maximum);
    }


    public void testCalculateMinorAxisRequirementsOrthogonal() {
        view = new BlockViewImpl(block, X_AXIS);
        SizeRequirements r = view.calculateMinorAxisRequirements(Y_AXIS, null);
        assertEquals(r.preferred, r.minimum);
        assertEquals(0, r.preferred);
        assertEquals(Integer.MAX_VALUE, r.maximum);


        doc.getStyleSheet().addRule("p {width: 305pt}");
        view.setPropertiesFromAttributes();
        SizeRequirements sr = view.calculateMinorAxisRequirements(Y_AXIS, r);
        assertSame(r, sr);
        assertEquals(r.preferred, r.minimum);
        assertEquals(0, r.preferred);
        assertEquals(Integer.MAX_VALUE, r.maximum);

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        final int[] spans = new int[view.getViewCount()];
        final int target = 305;
        ((BlockViewImpl)view).layoutMinorAxis(target, X_AXIS, offsets, spans);
        for (int i = 0; i < view.getViewCount(); i++) {
            View child = view.getView(i);
            SizeRequirements sr =
                new SizeRequirements((int)child.getMinimumSpan(X_AXIS),
                                     (int)child.getPreferredSpan(X_AXIS),
                                     (int)child.getMaximumSpan(X_AXIS),
                                     child.getAlignment(X_AXIS));
            assertEquals(getChildSpan(target, sr), spans[i]);
            assertEquals(getChildOffset(target, spans[i], sr), offsets[i]);

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        final int[] spans = new int[view.getViewCount()];
        final int target = 451;
        ((BlockViewImpl)view).layoutMinorAxis(target, X_AXIS, offsets, spans);
        for (int i = 0; i < view.getViewCount(); i++) {
            View child = view.getView(i);
            SizeRequirements sr =
                new SizeRequirements((int)child.getMinimumSpan(X_AXIS),
                                     (int)child.getPreferredSpan(X_AXIS),
                                     (int)child.getMaximumSpan(X_AXIS),
                                     child.getAlignment(X_AXIS));
            assertEquals(getChildSpan(target, sr), spans[i]);
            assertEquals(getChildOffset(target, spans[i], sr), offsets[i]);

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    /**
     * Tests <code>baselineRequirements</code> with ordinary children along
     * major axis - Y.
     */
    public void testBaselineRequirements01() {
        SizeRequirements sr;
        final int axis = Y_AXIS;
        sr = view.baselineRequirements(axis, null);
        // The sizes to the left and to the right from the alignment point
        int left = getLeft(PREFERRED, axis);
        int right = getRight(PREFERRED, axis);
        int size = left + right;
        assertEquals(size, sr.minimum);
        assertEquals(size, sr.preferred);
        assertEquals(size, sr.maximum);
        assertEquals((float) left / (float) size, sr.alignment, 0.00001f);
        SizeRequirements another = view.baselineRequirements(axis, sr);
        assertSame(sr, another);
    }

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    public void testBaselineRequirements02() {
        if (!isHarmony()) {
            return;
        }
        makeFlexible();
        SizeRequirements sr;
        final int axis = Y_AXIS;
        sr = view.baselineRequirements(axis, null);
        // The sizes to the left and to the right from the alignment point
        int minL = getLeft(MINIMUM, axis);
        int minR = getRight(MINIMUM, axis);

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