import java.net.*; import java.io.*; import javax.swing.*; import java.util.regex.*; import java.util.*; import java.awt.*; import java.util.List; public class main { public static void main(String[] args) { JFrame frame = new JFrame("A JavaX Frame"); JPanel panel = new JPanel(new GridLayout(2, 1)); final JTextArea textArea = new JTextArea(); panel.add(new JScrollPane(textArea)); JButton btnBla = new JButton("Bla"); panel.add(new CenteredLine(btnBla)); frame.add(panel); frame.setBounds(100, 100, 500, 400); frame.setVisible(true); exitOnFrameClose(frame); } static void exitOnFrameClose(JFrame frame) { frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); } } 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)); } } 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); } }
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ID | Author/Program | Comment | Date |
---|---|---|---|
904 | #1000604 (pitcher) | 2015-08-20 15:28:24 | |
898 | #1000610 (pitcher) | 2015-08-18 00:07:07 |
Snippet ID: | #2000434 |
Snippet name: | #635 converted to Java |
Eternal ID of this version: | #2000434/1 |
Text MD5: | ce68a58fe0490d509ae666c4b08ff61d |
Author: | stefan |
Category: | |
Type: | New Tinybrain snippet |
Public (visible to everyone): | Yes |
Archived (hidden from active list): | No |
Created/modified: | 2015-07-05 13:24:53 |
Source code size: | 15634 bytes / 494 lines |
Pitched / IR pitched: | No / Yes |
Views / Downloads: | 902 / 182 |
Referenced in: | [show references] |