LetterLayout and CenteredLine [2000337]

class LetterLayout implements LayoutManager {
  private String[] lines;
  private Map<String, Component> map = new TreeMap<String, Component>();
  private RC[] rows;
  private RC[] cols;
  private Cell[][] cells;
  private int spacingX = 10, spacingY = 10;
  private int insetTop, insetBottom, insetLeft, insetRight;
  private int template;
  private boolean formWideLeftSide, formWideRightSide;

  private static final int STALACTITE = 1, LEFT_ALIGNED_ROW = 2, CENTERED_ROW = 3, FORM = 4, RIGHT_ALIGNED_ROW = 5;
  private boolean debug;

  public void setLeftBorder(int border) {
    insetLeft = border;
  }

  public void setRightBorder(int border) {
    insetRight = border;
  }

  public static JComponent withBorder(JComponent component, int border) {
    JPanel panel = new JPanel(new LetterLayout("C").setBorder(border));
    panel.add("C", component);
    return panel;
  }

  public static JPanel panel(String... lines) {
    return new JPanel(new LetterLayout(lines));
  }

  public static JPanel stalactitePanel() {
    return new JPanel(stalactite());
  }

  static class DummyComponent extends JComponent {
  }

  /**
   * info about one matrix cell
   */
  static class Cell {
    boolean aux; // part of a larger cell, but not top-left corner
    int minWidth, minHeight;
    Component component;
    int colspan, rowspan;
    double weightX, weightY;
  }

  /**
   * info about one matrix row / column
   */
  static class RC {
    int min;
    double weightSum;
    int start;
    int minEnd;
  }

  private LetterLayout(int template) {
    this.template = template;
  }

  public LetterLayout(String... lines) {
    this.lines = lines;
  }

  public void removeLayoutComponent(Component component) {
    map.values().remove(component);
  }

  public void layoutContainer(Container container) {
    prepareLayout(container);

    // do layout

    if (debug)
      System.out.println("Container size: " + container.getSize());

    Insets insets = getInsets(container);
    for (int r = 0; r < rows.length; r++) {
      for (int i = 0; i < cols.length;) {
        Cell cell = cells[i][r];
        if (cell.aux)
          ++i;
        else {
          if (cell.component != null) {
            int x1 = cols[i].start;
            int y1 = rows[r].start;
            int x2 = i + cell.colspan < cols.length ? cols[i + cell.colspan].start - spacingX : container.getWidth() - insets.right;
            int y2 = r + cell.rowspan < rows.length ? rows[r + cell.rowspan].start - spacingY : container.getHeight() - insets.bottom;

            if (debug)
              System.out.println("Layouting ("+i+", "+r+", " + cell.component.getClass().getName() + "): "+x1+" "+y1+" "+x2+" "+y2);

            cell.component.setBounds(x1, y1, x2 - x1, y2 - y1);
          }
          i += cells[i][r].colspan;
        }
      }
    }
  }

  private void prepareLayout(Container container) {
    applyTemplate(container);

    int numRows = lines.length, numCols = lines[0].length();
    for (int i = 1; i < numRows; i++) if (lines[i].length() != numCols)
      throw new IllegalArgumentException("Lines have varying length");
    cells = new Cell[numCols][numRows];
    rows = new RC[numRows];
    cols = new RC[numCols];

    for (int r = 0; r < numRows; r++) rows[r] = new RC();
    for (int i = 0; i < numCols; i++) cols[i] = new RC();
    for (int r = 0; r < numRows; r++) for (int i = 0; i < numCols; i++) cells[i][r] = new Cell();

    // define cells

    for (int r = 0; r < numRows; r++) {
      String line = lines[r];
      for (int i = 0; i < numCols;) {
        Cell cell = cells[i][r];
        if (cell.aux) {
          ++i;
          continue;
        }
        char ch = line.charAt(i);
        int iNext = i;
        do ++iNext; while (iNext < numCols && ch == line.charAt(iNext));
        int rNext = r;
        do ++rNext; while (rNext < numRows && ch == lines[rNext].charAt(i));

        cell.weightX = numCols == 1 || iNext > i + 1 ? 1.0 : 0.0;
        cell.weightY = numRows == 1 || rNext > r + 1 ? 1.0 : 0.0;

        Component c = map.get(String.valueOf(ch));
        cell.component = c;
        if (c != null) {
          cell.minWidth = c.getMinimumSize().width + spacingX;
          cell.minHeight = getMinimumHeight(c) + spacingY;
        }
        cell.colspan = iNext - i;
        cell.rowspan = rNext - r;

        if (cell.colspan == 1)
          cols[i].min = Math.max(cols[i].min, cell.minWidth);
        if (cell.rowspan == 1)
          rows[r].min = Math.max(rows[r].min, cell.minHeight);

        for (int r2 = r; r2 < rNext; r2++)
          for (int i2 = i; i2 < iNext; i2++)
            if (r2 != r || i2 != i)
              cells[i2][r2].aux = true;

        i = iNext;
      }
    }

    // determine minStarts, weightSums

    while (true) {
      for (int i = 0; i < numCols; i++) {
        int minStart = i == 0 ? 0 : cols[i - 1].minEnd;
        double weightStart = i == 0 ? 0.0 : cols[i - 1].weightSum;
        for (int r = 0; r < numRows; r++) {
          Cell cell = cells[i][r];
          if (!cell.aux) {
            RC rc = cols[i + cell.colspan - 1];
            rc.minEnd = Math.max(rc.minEnd, minStart + cell.minWidth);
            rc.weightSum = Math.max(rc.weightSum, weightStart + cell.weightX);
          }
        }
      }

      for (int r = 0; r < numRows; r++) {
        int minStart = r == 0 ? 0 : rows[r - 1].minEnd;
        double weightStart = r == 0 ? 0.0 : rows[r - 1].weightSum;
        for (int i = 0; i < numCols; i++) {
          Cell cell = cells[i][r];
          if (!cell.aux) {
            RC rc = rows[r + cell.rowspan - 1];
            rc.minEnd = Math.max(rc.minEnd, minStart + cell.minHeight);
            rc.weightSum = Math.max(rc.weightSum, weightStart + cell.weightY);
          }
        }
      }

      if (allWeightsZero(cols)) {
        for (int r = 0; r < numRows; r++)
          for (int i = 0; i < numCols; i++)
            cells[i][r].weightX = 1.0;
        continue;
      }

      if (allWeightsZero(rows)) {
        for (int r = 0; r < numRows; r++)
          for (int i = 0; i < numCols; i++)
            cells[i][r].weightY = 1.0;
        continue;
      }

      break;
    }

    // determine row, col starts

    Insets insets = getInsets(container);
    determineStarts(cols, insets.left, container.getWidth() - insets.left - insets.right + spacingX, spacingX);
    determineStarts(rows, insets.top, container.getHeight() - insets.top - insets.bottom + spacingY, spacingY);
  }

  private boolean allWeightsZero(RC[] rcs) {
    for (int i = 0; i < rcs.length; i++)
      if (rcs[i].weightSum != 0.0)
        return false;
    return true;
  }

  private static int getMinimumHeight(Component c) {
    if (c instanceof JTextArea) {
      return (int) ((JTextArea) c).getUI().getRootView((JTextArea) c).getPreferredSpan(javax.swing.text.View.Y_AXIS);
    }
    return c.getMinimumSize().height;
  }

  private void applyTemplate(Container container) {
    if (template == STALACTITE) {
      Component[] components = container.getComponents();

      lines = new String[components.length + 2];
      map.clear();
      for (int i = 0; i < components.length; i++) {
        String s = String.valueOf(makeIndexChar(i));
        map.put(s, components[i]);
        lines[i] = s;
      }
      lines[components.length] = lines[components.length + 1] = " ";
    } else if (template == FORM) {
      /* old method of calculating numRows:
      int numRows = 0;
      for (String key : map.keySet()) {
        if (key.length() == 1)
          numRows = Math.max(numRows, Character.toLowerCase(key.charAt(0))-'a');
      }*/
      Component[] components = container.getComponents();
      int numRows = components.length/2;

      lines = new String[numRows+2];
      map.clear();
      for (int row = 0; row < numRows; row++) {
        String lower = String.valueOf(makeIndexChar(row));
        String upper = String.valueOf(makeAlternateIndexChar(row));
        Component rightComponent = components[row * 2 + 1];
        if (rightComponent instanceof DummyComponent)
          upper = lower;
        lines[row] = (formWideLeftSide ? lower + lower : lower) + (formWideRightSide ? upper + upper : upper);
        map.put(lower, components[row*2]);
        if (!(rightComponent instanceof DummyComponent))
          map.put(upper, rightComponent);
      }
      lines[numRows] = lines[numRows+1] = (formWideLeftSide ? "  " : " ") + (formWideRightSide ? "  " : " ");
    } else if (template == LEFT_ALIGNED_ROW) {
      lines = new String[] { makeSingleRow(container) + RIGHT_CHAR + RIGHT_CHAR };
    } else if (template == CENTERED_ROW) {
      lines = new String[] { "" + LEFT_CHAR + LEFT_CHAR + makeSingleRow(container) + RIGHT_CHAR + RIGHT_CHAR };
    } else if (template == RIGHT_ALIGNED_ROW) {
      lines = new String[] { "" + LEFT_CHAR + LEFT_CHAR + makeSingleRow(container) };
    }
  }

  private String makeSingleRow(Container container) {
    Component[] components = container.getComponents();
    StringBuffer buf = new StringBuffer();
    map.clear();
    for (int i = 0; i < components.length; i++) {
      String s = String.valueOf(makeAlternateIndexChar(i));
      map.put(s, components[i]);
      buf.append(s);
    }
    return buf.toString();
  }

  private static void determineStarts(RC[] rcs, int start, int totalSize, int spacing) {
    int minTotal = rcs[rcs.length - 1].minEnd;
    double weightSum = rcs[rcs.length - 1].weightSum;
    //System.out.println("totalSize="+totalSize+",minTotal="+minTotal+",weightSum="+weightSum);
    int spare = (int) ((totalSize - minTotal) / (weightSum == 0.0 ? 1.0 : weightSum));
    int x = start, minSum = 0;
    double prevWeightSum = 0.0;
    for (int i = 0; i < rcs.length; i++) {
      int width = rcs[i].minEnd - minSum + (int) ((rcs[i].weightSum - prevWeightSum) * spare) - spacing;
      //System.out.println("i="+i+",prevws="+prevWeightSum+",ws="+rcs[i].weightSum+",min="+rcs[i].min+",width="+width);
      rcs[i].start = x;
      x += width + spacing;
      prevWeightSum = rcs[i].weightSum;
      minSum = rcs[i].minEnd;
    }
  }

  public void addLayoutComponent(String s, Component component) {
    map.put(s, component);
  }

  public Dimension minimumLayoutSize(Container container) {
    prepareLayout(container);
    Insets insets = getInsets(container);
    Dimension result = new Dimension(
      insets.left + cols[cols.length - 1].minEnd + insets.right - spacingX,
      insets.top + rows[rows.length - 1].minEnd + insets.bottom - spacingY);
    return result;
  }

  private Insets getInsets(Container container) {
    Insets insets = container.getInsets();
    return new Insets(insets.top + insetTop,
      insets.left + insetLeft,
      insets.bottom + insetBottom,
      insets.right + insetRight);
  }

  public Dimension preferredLayoutSize(Container container) {
    return minimumLayoutSize(container);
  }

  public LetterLayout setSpacing(int x, int y) {
    spacingX = x;
    spacingY = y;
    return this;
  }

  public LetterLayout setSpacing(int spacing) {
    return setSpacing(spacing, spacing);
  }

  public LetterLayout setBorder(int top, int left, int bottom, int right) {
    insetTop = top;
    insetLeft = left;
    insetBottom = bottom;
    insetRight = right;
    return this;
  }

  public LetterLayout setBorder(int inset) {
    return setBorder(inset, inset, inset, inset);
  }

  public LetterLayout setTopBorder(int inset) {
    insetTop = inset;
    return this;
  }

  /**
   * layout components from top to bottom; add components without letters!
   */
  public static LetterLayout stalactite() {
    return new LetterLayout(STALACTITE);
  }

  /**
   * layout components from left to right; add components without letters!
   */
  public static LetterLayout leftAlignedRow() {
    return new LetterLayout(LEFT_ALIGNED_ROW);
  }

  public static LetterLayout leftAlignedRow(int spacing) {
    return leftAlignedRow().setSpacing(spacing);
  }

  /**
   * layout components from left to right, center in container; add components without letters!
   */
  public static LetterLayout centeredRow() {
    return new LetterLayout(CENTERED_ROW);
  }

  public static LetterLayout rightAlignedRow() {
    return new LetterLayout(RIGHT_ALIGNED_ROW);
  }

  public static JPanel rightAlignedRowPanel(JComponent... components) {
    return makePanel(new LetterLayout(RIGHT_ALIGNED_ROW), components);
  }

  private static JPanel makePanel(LetterLayout letterLayout, JComponent[] components) {
    JPanel panel = new JPanel(letterLayout);
    for (JComponent component : components) {
      panel.add(component);
    }
    return panel;
  }

  /**
   * layout components from top to bottom; two components per row
   */
  public static LetterLayout form() {
    LetterLayout letterLayout = new LetterLayout(FORM);
    letterLayout.formWideLeftSide = true;
    letterLayout.formWideRightSide = true;
    return letterLayout;
  }

  /**
   * layout components from top to bottom; two components per row
   * left column is small, right column is wide
   */
  public static LetterLayout formWideRightSide() {
    LetterLayout letterLayout = new LetterLayout(FORM);
    letterLayout.formWideRightSide = true;
    return letterLayout;
  }

  public static Component getDummyComponent() {
    return new DummyComponent();
  }

  public static JPanel newPanel(String... lines) {
    return new JPanel(new LetterLayout(lines));
  }

  public boolean isDebug() {
    return debug;
  }

  public void setDebug(boolean debug) {
    this.debug = debug;
  }

  public static char makeIndexChar(int idx) {
    return (char) ('a' + idx*2);
  }

  public static char makeAlternateIndexChar(int idx) {
    return (char) ('b' + idx*2);
  }

  public static char LEFT_CHAR = ',', RIGHT_CHAR = '.';

  public static void main(String[] args) {
    System.out.println((int) makeIndexChar(0));
    System.out.println((int) makeAlternateIndexChar(0));
    System.out.println((int) makeIndexChar(32000));
    System.out.println((int) makeAlternateIndexChar(32000));
    System.out.println((int) LEFT_CHAR);
    System.out.println((int) RIGHT_CHAR);
  }
}

class CenteredLine extends JPanel {
  public CenteredLine(Component... components) {
    setLayout(LetterLayout.centeredRow());
    for (Component component : components)
      add(component);
  }

  public void add(String text) {
    add(new JLabel(text));
  }
}

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Snippet ID:	#2000337
Snippet name:	LetterLayout and CenteredLine
Eternal ID of this version:	#2000337/1
Text MD5:	7d44385396711bd148c22d53322eb0bd
Author:	stefan
Category:	javax
Type:	New Tinybrain snippet
Public (visible to everyone):	Yes
Archived (hidden from active list):	No
Created/modified:	2015-05-10 17:10:09
Source code size:	14850 bytes / 461 lines
Pitched / IR pitched:	No / Yes
Views / Downloads:	691 / 164
Referenced in:	[show references]

< > BotCompany Repo | #2000337 // LetterLayout and CenteredLine

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1	class LetterLayout implements LayoutManager {
2	private String[] lines;
3	private Map<String, Component> map = new TreeMap<String, Component>();
4	private RC[] rows;
5	private RC[] cols;
6	private Cell[][] cells;
7	private int spacingX = 10, spacingY = 10;
8	private int insetTop, insetBottom, insetLeft, insetRight;
9	private int template;
10	private boolean formWideLeftSide, formWideRightSide;
11
12	private static final int STALACTITE = 1, LEFT_ALIGNED_ROW = 2, CENTERED_ROW = 3, FORM = 4, RIGHT_ALIGNED_ROW = 5;
13	private boolean debug;
14
15	public void setLeftBorder(int border) {
16	insetLeft = border;
17	}
18
19	public void setRightBorder(int border) {
20	insetRight = border;
21	}
22
23	public static JComponent withBorder(JComponent component, int border) {
24	JPanel panel = new JPanel(new LetterLayout("C").setBorder(border));
25	panel.add("C", component);
26	return panel;
27	}
28
29	public static JPanel panel(String... lines) {
30	return new JPanel(new LetterLayout(lines));
31	}
32
33	public static JPanel stalactitePanel() {
34	return new JPanel(stalactite());
35	}
36
37	static class DummyComponent extends JComponent {
38	}
39
40	/**
41	* info about one matrix cell
42	*/
43	static class Cell {
44	boolean aux; // part of a larger cell, but not top-left corner
45	int minWidth, minHeight;
46	Component component;
47	int colspan, rowspan;
48	double weightX, weightY;
49	}
50
51	/**
52	* info about one matrix row / column
53	*/
54	static class RC {
55	int min;
56	double weightSum;
57	int start;
58	int minEnd;
59	}
60
61	private LetterLayout(int template) {
62	this.template = template;
63	}
64
65	public LetterLayout(String... lines) {
66	this.lines = lines;
67	}
68
69	public void removeLayoutComponent(Component component) {
70	map.values().remove(component);
71	}
72
73	public void layoutContainer(Container container) {
74	prepareLayout(container);
75
76	// do layout
77
78	if (debug)
79	System.out.println("Container size: " + container.getSize());
80
81	Insets insets = getInsets(container);
82	for (int r = 0; r < rows.length; r++) {
83	for (int i = 0; i < cols.length;) {
84	Cell cell = cells[i][r];
85	if (cell.aux)
86	++i;
87	else {
88	if (cell.component != null) {
89	int x1 = cols[i].start;
90	int y1 = rows[r].start;
91	int x2 = i + cell.colspan < cols.length ? cols[i + cell.colspan].start - spacingX : container.getWidth() - insets.right;
92	int y2 = r + cell.rowspan < rows.length ? rows[r + cell.rowspan].start - spacingY : container.getHeight() - insets.bottom;
93
94	if (debug)
95	System.out.println("Layouting ("+i+", "+r+", " + cell.component.getClass().getName() + "): "+x1+" "+y1+" "+x2+" "+y2);
96
97	cell.component.setBounds(x1, y1, x2 - x1, y2 - y1);
98	}
99	i += cells[i][r].colspan;
100	}
101	}
102	}
103	}
104
105	private void prepareLayout(Container container) {
106	applyTemplate(container);
107
108	int numRows = lines.length, numCols = lines[0].length();
109	for (int i = 1; i < numRows; i++) if (lines[i].length() != numCols)
110	throw new IllegalArgumentException("Lines have varying length");
111	cells = new Cell[numCols][numRows];
112	rows = new RC[numRows];
113	cols = new RC[numCols];
114
115	for (int r = 0; r < numRows; r++) rows[r] = new RC();
116	for (int i = 0; i < numCols; i++) cols[i] = new RC();
117	for (int r = 0; r < numRows; r++) for (int i = 0; i < numCols; i++) cells[i][r] = new Cell();
118
119	// define cells
120
121	for (int r = 0; r < numRows; r++) {
122	String line = lines[r];
123	for (int i = 0; i < numCols;) {
124	Cell cell = cells[i][r];
125	if (cell.aux) {
126	++i;
127	continue;
128	}
129	char ch = line.charAt(i);
130	int iNext = i;
131	do ++iNext; while (iNext < numCols && ch == line.charAt(iNext));
132	int rNext = r;
133	do ++rNext; while (rNext < numRows && ch == lines[rNext].charAt(i));
134
135	cell.weightX = numCols == 1 \|\| iNext > i + 1 ? 1.0 : 0.0;
136	cell.weightY = numRows == 1 \|\| rNext > r + 1 ? 1.0 : 0.0;
137
138	Component c = map.get(String.valueOf(ch));
139	cell.component = c;
140	if (c != null) {
141	cell.minWidth = c.getMinimumSize().width + spacingX;
142	cell.minHeight = getMinimumHeight(c) + spacingY;
143	}
144	cell.colspan = iNext - i;
145	cell.rowspan = rNext - r;
146
147	if (cell.colspan == 1)
148	cols[i].min = Math.max(cols[i].min, cell.minWidth);
149	if (cell.rowspan == 1)
150	rows[r].min = Math.max(rows[r].min, cell.minHeight);
151
152	for (int r2 = r; r2 < rNext; r2++)
153	for (int i2 = i; i2 < iNext; i2++)
154	if (r2 != r \|\| i2 != i)
155	cells[i2][r2].aux = true;
156
157	i = iNext;
158	}
159	}
160
161	// determine minStarts, weightSums
162
163	while (true) {
164	for (int i = 0; i < numCols; i++) {
165	int minStart = i == 0 ? 0 : cols[i - 1].minEnd;
166	double weightStart = i == 0 ? 0.0 : cols[i - 1].weightSum;
167	for (int r = 0; r < numRows; r++) {
168	Cell cell = cells[i][r];
169	if (!cell.aux) {
170	RC rc = cols[i + cell.colspan - 1];
171	rc.minEnd = Math.max(rc.minEnd, minStart + cell.minWidth);
172	rc.weightSum = Math.max(rc.weightSum, weightStart + cell.weightX);
173	}
174	}
175	}
176
177	for (int r = 0; r < numRows; r++) {
178	int minStart = r == 0 ? 0 : rows[r - 1].minEnd;
179	double weightStart = r == 0 ? 0.0 : rows[r - 1].weightSum;
180	for (int i = 0; i < numCols; i++) {
181	Cell cell = cells[i][r];
182	if (!cell.aux) {
183	RC rc = rows[r + cell.rowspan - 1];
184	rc.minEnd = Math.max(rc.minEnd, minStart + cell.minHeight);
185	rc.weightSum = Math.max(rc.weightSum, weightStart + cell.weightY);
186	}
187	}
188	}
189
190	if (allWeightsZero(cols)) {
191	for (int r = 0; r < numRows; r++)
192	for (int i = 0; i < numCols; i++)
193	cells[i][r].weightX = 1.0;
194	continue;
195	}
196
197	if (allWeightsZero(rows)) {
198	for (int r = 0; r < numRows; r++)
199	for (int i = 0; i < numCols; i++)
200	cells[i][r].weightY = 1.0;
201	continue;
202	}
203
204	break;
205	}
206
207	// determine row, col starts
208
209	Insets insets = getInsets(container);
210	determineStarts(cols, insets.left, container.getWidth() - insets.left - insets.right + spacingX, spacingX);
211	determineStarts(rows, insets.top, container.getHeight() - insets.top - insets.bottom + spacingY, spacingY);
212	}
213
214	private boolean allWeightsZero(RC[] rcs) {
215	for (int i = 0; i < rcs.length; i++)
216	if (rcs[i].weightSum != 0.0)
217	return false;
218	return true;
219	}
220
221	private static int getMinimumHeight(Component c) {
222	if (c instanceof JTextArea) {
223	return (int) ((JTextArea) c).getUI().getRootView((JTextArea) c).getPreferredSpan(javax.swing.text.View.Y_AXIS);
224	}
225	return c.getMinimumSize().height;
226	}
227
228	private void applyTemplate(Container container) {
229	if (template == STALACTITE) {
230	Component[] components = container.getComponents();
231
232	lines = new String[components.length + 2];
233	map.clear();
234	for (int i = 0; i < components.length; i++) {
235	String s = String.valueOf(makeIndexChar(i));
236	map.put(s, components[i]);
237	lines[i] = s;
238	}
239	lines[components.length] = lines[components.length + 1] = " ";
240	} else if (template == FORM) {
241	/* old method of calculating numRows:
242	int numRows = 0;
243	for (String key : map.keySet()) {
244	if (key.length() == 1)
245	numRows = Math.max(numRows, Character.toLowerCase(key.charAt(0))-'a');
246	}*/
247	Component[] components = container.getComponents();
248	int numRows = components.length/2;
249
250	lines = new String[numRows+2];
251	map.clear();
252	for (int row = 0; row < numRows; row++) {
253	String lower = String.valueOf(makeIndexChar(row));
254	String upper = String.valueOf(makeAlternateIndexChar(row));
255	Component rightComponent = components[row * 2 + 1];
256	if (rightComponent instanceof DummyComponent)
257	upper = lower;
258	lines[row] = (formWideLeftSide ? lower + lower : lower) + (formWideRightSide ? upper + upper : upper);
259	map.put(lower, components[row*2]);
260	if (!(rightComponent instanceof DummyComponent))
261	map.put(upper, rightComponent);
262	}
263	lines[numRows] = lines[numRows+1] = (formWideLeftSide ? " " : " ") + (formWideRightSide ? " " : " ");
264	} else if (template == LEFT_ALIGNED_ROW) {
265	lines = new String[] { makeSingleRow(container) + RIGHT_CHAR + RIGHT_CHAR };
266	} else if (template == CENTERED_ROW) {
267	lines = new String[] { "" + LEFT_CHAR + LEFT_CHAR + makeSingleRow(container) + RIGHT_CHAR + RIGHT_CHAR };
268	} else if (template == RIGHT_ALIGNED_ROW) {
269	lines = new String[] { "" + LEFT_CHAR + LEFT_CHAR + makeSingleRow(container) };
270	}
271	}
272
273	private String makeSingleRow(Container container) {
274	Component[] components = container.getComponents();
275	StringBuffer buf = new StringBuffer();
276	map.clear();
277	for (int i = 0; i < components.length; i++) {
278	String s = String.valueOf(makeAlternateIndexChar(i));
279	map.put(s, components[i]);
280	buf.append(s);
281	}
282	return buf.toString();
283	}
284
285	private static void determineStarts(RC[] rcs, int start, int totalSize, int spacing) {
286	int minTotal = rcs[rcs.length - 1].minEnd;
287	double weightSum = rcs[rcs.length - 1].weightSum;
288	//System.out.println("totalSize="+totalSize+",minTotal="+minTotal+",weightSum="+weightSum);
289	int spare = (int) ((totalSize - minTotal) / (weightSum == 0.0 ? 1.0 : weightSum));
290	int x = start, minSum = 0;
291	double prevWeightSum = 0.0;
292	for (int i = 0; i < rcs.length; i++) {
293	int width = rcs[i].minEnd - minSum + (int) ((rcs[i].weightSum - prevWeightSum) * spare) - spacing;
294	//System.out.println("i="+i+",prevws="+prevWeightSum+",ws="+rcs[i].weightSum+",min="+rcs[i].min+",width="+width);
295	rcs[i].start = x;
296	x += width + spacing;
297	prevWeightSum = rcs[i].weightSum;
298	minSum = rcs[i].minEnd;
299	}
300	}
301
302	public void addLayoutComponent(String s, Component component) {
303	map.put(s, component);
304	}
305
306	public Dimension minimumLayoutSize(Container container) {
307	prepareLayout(container);
308	Insets insets = getInsets(container);
309	Dimension result = new Dimension(
310	insets.left + cols[cols.length - 1].minEnd + insets.right - spacingX,
311	insets.top + rows[rows.length - 1].minEnd + insets.bottom - spacingY);
312	return result;
313	}
314
315	private Insets getInsets(Container container) {
316	Insets insets = container.getInsets();
317	return new Insets(insets.top + insetTop,
318	insets.left + insetLeft,
319	insets.bottom + insetBottom,
320	insets.right + insetRight);
321	}
322
323	public Dimension preferredLayoutSize(Container container) {
324	return minimumLayoutSize(container);
325	}
326
327	public LetterLayout setSpacing(int x, int y) {
328	spacingX = x;
329	spacingY = y;
330	return this;
331	}
332
333	public LetterLayout setSpacing(int spacing) {
334	return setSpacing(spacing, spacing);
335	}
336
337	public LetterLayout setBorder(int top, int left, int bottom, int right) {
338	insetTop = top;
339	insetLeft = left;
340	insetBottom = bottom;
341	insetRight = right;
342	return this;
343	}
344
345	public LetterLayout setBorder(int inset) {
346	return setBorder(inset, inset, inset, inset);
347	}
348
349	public LetterLayout setTopBorder(int inset) {
350	insetTop = inset;
351	return this;
352	}
353
354	/**
355	* layout components from top to bottom; add components without letters!
356	*/
357	public static LetterLayout stalactite() {
358	return new LetterLayout(STALACTITE);
359	}
360
361	/**
362	* layout components from left to right; add components without letters!
363	*/
364	public static LetterLayout leftAlignedRow() {
365	return new LetterLayout(LEFT_ALIGNED_ROW);
366	}
367
368	public static LetterLayout leftAlignedRow(int spacing) {
369	return leftAlignedRow().setSpacing(spacing);
370	}
371
372	/**
373	* layout components from left to right, center in container; add components without letters!
374	*/
375	public static LetterLayout centeredRow() {
376	return new LetterLayout(CENTERED_ROW);
377	}
378
379	public static LetterLayout rightAlignedRow() {
380	return new LetterLayout(RIGHT_ALIGNED_ROW);
381	}
382
383	public static JPanel rightAlignedRowPanel(JComponent... components) {
384	return makePanel(new LetterLayout(RIGHT_ALIGNED_ROW), components);
385	}
386
387	private static JPanel makePanel(LetterLayout letterLayout, JComponent[] components) {
388	JPanel panel = new JPanel(letterLayout);
389	for (JComponent component : components) {
390	panel.add(component);
391	}
392	return panel;
393	}
394
395	/**
396	* layout components from top to bottom; two components per row
397	*/
398	public static LetterLayout form() {
399	LetterLayout letterLayout = new LetterLayout(FORM);
400	letterLayout.formWideLeftSide = true;
401	letterLayout.formWideRightSide = true;
402	return letterLayout;
403	}
404
405	/**
406	* layout components from top to bottom; two components per row
407	* left column is small, right column is wide
408	*/
409	public static LetterLayout formWideRightSide() {
410	LetterLayout letterLayout = new LetterLayout(FORM);
411	letterLayout.formWideRightSide = true;
412	return letterLayout;
413	}
414
415	public static Component getDummyComponent() {
416	return new DummyComponent();
417	}
418
419	public static JPanel newPanel(String... lines) {
420	return new JPanel(new LetterLayout(lines));
421	}
422
423	public boolean isDebug() {
424	return debug;
425	}
426
427	public void setDebug(boolean debug) {
428	this.debug = debug;
429	}
430
431	public static char makeIndexChar(int idx) {
432	return (char) ('a' + idx*2);
433	}
434
435	public static char makeAlternateIndexChar(int idx) {
436	return (char) ('b' + idx*2);
437	}
438
439	public static char LEFT_CHAR = ',', RIGHT_CHAR = '.';
440
441	public static void main(String[] args) {
442	System.out.println((int) makeIndexChar(0));
443	System.out.println((int) makeAlternateIndexChar(0));
444	System.out.println((int) makeIndexChar(32000));
445	System.out.println((int) makeAlternateIndexChar(32000));
446	System.out.println((int) LEFT_CHAR);
447	System.out.println((int) RIGHT_CHAR);
448	}
449	}
450
451	class CenteredLine extends JPanel {
452	public CenteredLine(Component... components) {
453	setLayout(LetterLayout.centeredRow());
454	for (Component component : components)
455	add(component);
456	}
457
458	public void add(String text) {
459	add(new JLabel(text));
460	}
461	}