/
MainPanel.java
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/
MainPanel.java
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// -*- mode:java; encoding:utf-8 -*-
// vim:set fileencoding=utf-8:
// @homepage@
package example;
import java.awt.*;
import java.util.Optional;
import javax.swing.*;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeCellRenderer;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.tree.TreeCellRenderer;
import javax.swing.tree.TreeModel;
import javax.swing.tree.TreePath;
public final class MainPanel extends JPanel {
private MainPanel() {
super(new BorderLayout());
JTree tree1 = new JTree(makeModel()) {
@Override public boolean getScrollableTracksViewportWidth() {
return true;
}
@Override public void updateUI() {
super.updateUI();
setCellRenderer(new TableOfContentsTreeCellRenderer());
setBorder(BorderFactory.createTitledBorder("TreeCellRenderer"));
}
};
tree1.setRootVisible(false);
// TEST: tree1.setRowHeight(40);
JTree tree2 = new TableOfContentsTree(makeModel());
tree2.setRootVisible(false);
// tree2.setLargeModel(false);
// TEST: tree2.setRowHeight(40);
JScrollPane s1 = new JScrollPane(tree1);
JScrollPane s2 = new JScrollPane(tree2);
JSplitPane split = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT, s1, s2);
split.setResizeWeight(.5);
add(split);
setPreferredSize(new Dimension(320, 240));
}
private static DefaultTreeModel makeModel() {
DefaultMutableTreeNode root = new DefaultMutableTreeNode("root");
root.add(new DefaultMutableTreeNode(new TableOfContents("1. Introduction", 1)));
DefaultMutableTreeNode s1 = new DefaultMutableTreeNode(new TableOfContents("2. Chapter", 1));
s1.add(new DefaultMutableTreeNode(new TableOfContents("2.1. Section", 2)));
s1.add(new DefaultMutableTreeNode(new TableOfContents("2.2. Section", 4)));
s1.add(new DefaultMutableTreeNode(new TableOfContents("2.3. Section", 8)));
root.add(s1);
DefaultMutableTreeNode s2 = new DefaultMutableTreeNode(new TableOfContents("3. Chapter", 10));
s2.add(new DefaultMutableTreeNode(new TableOfContents("ddd", 12)));
s2.add(new DefaultMutableTreeNode(new TableOfContents("eee", 24)));
s2.add(new DefaultMutableTreeNode(new TableOfContents("fff", 38)));
root.add(s2);
return new DefaultTreeModel(root);
}
public static void main(String[] args) {
EventQueue.invokeLater(MainPanel::createAndShowGui);
}
private static void createAndShowGui() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (UnsupportedLookAndFeelException ignored) {
Toolkit.getDefaultToolkit().beep();
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException ex) {
ex.printStackTrace();
return;
}
JFrame frame = new JFrame("@title@");
frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
frame.getContentPane().add(new MainPanel());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
}
class TableOfContents {
private final String title;
private final Integer page;
protected TableOfContents(String title, int page) {
this.title = title;
this.page = page;
}
// public String getTitle() {
// return title;
// }
public Integer getPage() {
return page;
}
@Override public String toString() {
return title;
}
}
class TableOfContentsTreeCellRenderer extends DefaultTreeCellRenderer {
protected static final BasicStroke READER = new BasicStroke(
1f, BasicStroke.CAP_BUTT, BasicStroke.JOIN_MITER, 1f, new float[] {1f}, 0f);
protected int pn = -1;
protected final Point pnPt = new Point();
protected int rxs;
protected int rxe;
protected boolean isSynth;
protected final JPanel renderer = new JPanel(new BorderLayout()) {
@Override protected void paintComponent(Graphics g) {
super.paintComponent(g);
if (pn >= 0) {
String str = String.format("%3d", pn);
FontMetrics metrics = g.getFontMetrics();
// int xx = pnPt.x - getX() - metrics.stringWidth(str);
Graphics2D g2 = (Graphics2D) g.create();
g2.setPaint(isSynth ? getForeground() : getTextNonSelectionColor());
g2.drawString(str, pnPt.x - getX() - metrics.stringWidth(str), pnPt.y);
g2.setStroke(READER);
g2.drawLine(rxs, pnPt.y, rxe - getX() - metrics.stringWidth("000"), pnPt.y);
g2.dispose();
}
}
@Override public Dimension getPreferredSize() {
Dimension d = super.getPreferredSize();
d.width = Short.MAX_VALUE;
return d;
}
};
@Override public void updateUI() {
super.updateUI();
isSynth = getUI().getClass().getName().contains("Synth");
if (isSynth) {
// System.out.println("XXX: FocusBorder bug?, JDK 1.7.0, Nimbus start LnF");
setBackgroundSelectionColor(new Color(0x0, true));
}
}
@Override public Component getTreeCellRendererComponent(JTree tree, Object value, boolean selected, boolean expanded, boolean leaf, int row, boolean hasFocus) {
Component c = super.getTreeCellRendererComponent(
tree, value, selected, expanded, leaf, row, hasFocus);
return Optional.ofNullable(value)
.filter(DefaultMutableTreeNode.class::isInstance)
.map(DefaultMutableTreeNode.class::cast)
.map(DefaultMutableTreeNode::getUserObject)
.filter(TableOfContents.class::isInstance)
.map(TableOfContents.class::cast)
.<Component>map(toc -> {
renderer.removeAll();
renderer.add(c, BorderLayout.WEST);
if (isSynth) {
renderer.setForeground(c.getForeground());
}
int gap = c instanceof JLabel ? ((JLabel) c).getIconTextGap() : 0;
Dimension d = c.getPreferredSize();
d.height = tree.isFixedRowHeight() ? tree.getRowHeight() : d.height;
pnPt.setLocation(tree.getWidth() - gap, c.getBaseline(d.width, d.height));
pn = toc.getPage();
rxs = d.width + gap;
rxe = tree.getWidth() - tree.getInsets().right - gap;
renderer.setOpaque(false);
return renderer;
})
.orElseGet(() -> {
pn = -1;
return c;
});
}
// @Override public Component getTreeCellRendererComponent(JTree tree, Object value, boolean selected, boolean expanded, boolean leaf, int row, boolean hasFocus) {
// Component c = super.getTreeCellRendererComponent(
// tree, value, selected, expanded, leaf, row, hasFocus);
// if (value instanceof DefaultMutableTreeNode && c instanceof JLabel) {
// JLabel l = (JLabel) c;
// DefaultMutableTreeNode n = (DefaultMutableTreeNode) value;
// Object o = n.getUserObject();
// if (o instanceof TableOfContents) {
// TableOfContents toc = (TableOfContents) o;
// int gap = l.getIconTextGap();
// Dimension d = l.getPreferredSize();
// Insets ins = tree.getInsets();
//
// p.removeAll();
// p.add(l, BorderLayout.WEST);
// if (isSynth) {
// p.setForeground(l.getForeground());
// }
//
// pnPt.setLocation(tree.getWidth() - gap, l.getBaseline(d.width, d.height));
// pn = toc.page;
// rxs = d.width + gap;
// rxe = tree.getWidth() - ins.right - gap;
//
// p.setOpaque(false);
// return p;
// }
// }
// pn = -1;
// return c;
// }
}
// // TEST:
// class ShortTableOfContentsTreeCellRenderer extends DefaultTreeCellRenderer {
// protected static final String READER = "... ";
// protected final Point pt = new Point();
// protected String pn;
// protected boolean isSynth;
// protected final JPanel p = new JPanel(new BorderLayout()) {
// @Override protected void paintComponent(Graphics g) {
// super.paintComponent(g);
// if (pn != null) {
// g.setColor(isSynth ? getForeground() : getTextNonSelectionColor());
// g.drawString(pn, pt.x - getX(), pt.y);
// }
// }
//
// @Override public Dimension getPreferredSize() {
// Dimension d = super.getPreferredSize();
// d.width = Short.MAX_VALUE;
// return d;
// }
// };
//
// @Override public void updateUI() {
// super.updateUI();
// isSynth = getUI().getClass().getName().contains("Synth");
// if (isSynth) {
// // System.out.println("XXX: FocusBorder bug?, JDK 1.7.0, Nimbus start LnF");
// setBackgroundSelectionColor(new Color(0x0, true));
// }
// }
//
// @Override public Component getTreeCellRendererComponent(JTree tree, Object value, boolean selected, boolean expanded, boolean leaf, int row, boolean hasFocus) {
// Component c = super.getTreeCellRendererComponent(
// tree, value, selected, expanded, leaf, row, hasFocus);
// if (value instanceof DefaultMutableTreeNode && c instanceof JLabel) {
// JLabel l = (JLabel) c;
// DefaultMutableTreeNode n = (DefaultMutableTreeNode) value;
// Object o = n.getUserObject();
// if (o instanceof TableOfContents) {
// TableOfContents toc = (TableOfContents) o;
// FontMetrics metrics = l.getFontMetrics(l.getFont());
// int gap = l.getIconTextGap();
//
// p.removeAll();
// p.add(l, BorderLayout.WEST);
// if (isSynth) {
// p.setForeground(l.getForeground());
// }
//
// pn = String.format("%s%3d", READER, toc.page);
// pt.x = tree.getWidth() - metrics.stringWidth(pn) - gap;
// pt.y = (l.getIcon().getIconHeight() + metrics.getAscent()) / 2;
// p.setOpaque(false);
//
// return p;
// }
// }
// pn = null;
// return c;
// }
// }
class TableOfContentsTree extends JTree {
protected static final BasicStroke READER = new BasicStroke(
1f, BasicStroke.CAP_BUTT, BasicStroke.JOIN_MITER, 1f, new float[] {1f}, 0f);
protected boolean isSynth;
protected TableOfContentsTree(TreeModel model) {
super(model);
}
@Override public void updateUI() {
super.updateUI();
setBorder(BorderFactory.createTitledBorder("JTree#paintComponent(...)"));
isSynth = getUI().getClass().getName().contains("Synth");
}
// protected Rectangle getVisibleRowsRect() {
// Insets i = getInsets();
// Rectangle visRect = getVisibleRect();
// //if (visRect.width == 0 && visRect.height == 0 && getVisibleRowCount() > 0) {
// if (visRect.isEmpty() && getVisibleRowCount() > 0) {
// // The tree doesn't have a valid bounds yet. Calculate
// // based on visible row count.
// visRect.width = 1;
// visRect.height = getRowHeight() * getVisibleRowCount();
// } else {
// visRect.x -= i.left;
// visRect.y -= i.top;
// }
// // we should consider a non-visible area above
// Class<JScrollPane> clz = JScrollPane.class;
// Optional.ofNullable(SwingUtilities.getAncestorOfClass(clz, this))
// .filter(clz::isInstance).map(clz::cast)
// .map(JScrollPane::getHorizontalScrollBar)
// .filter(JScrollBar::isVisible)
// .ifPresent(bar -> {
// int height = bar.getHeight();
// visRect.y -= height;
// visRect.height += height;
// });
// // Container container = SwingUtilities.getAncestorOfClass(JScrollPane.class, this);
// // if (container instanceof JScrollPane) {
// // JScrollPane pane = (JScrollPane) container;
// // JScrollBar bar = pane.getHorizontalScrollBar();
// // if (bar != null && bar.isVisible()) {
// // int height = bar.getHeight();
// // visRect.y -= height;
// // visRect.height += height;
// // }
// // }
// return visRect;
// }
@Override protected void paintComponent(Graphics g) {
g.setColor(getBackground());
g.fillRect(0, 0, getWidth(), getHeight());
super.paintComponent(g);
Graphics2D g2 = (Graphics2D) g.create();
int pageNumMaxWidth = g.getFontMetrics().stringWidth("000");
int maxX = (int) SwingUtilities.calculateInnerArea(this, null).getMaxX();
Rectangle rect = getVisibleRect();
for (int i = 0; i < getRowCount(); i++) {
Rectangle r = getRowBounds(i);
if (rect.intersects(r)) {
drawReader(g2, pageNumMaxWidth, maxX, r, i);
}
}
g2.dispose();
}
private void drawReader(Graphics2D g2, int pageNumMaxWidth, int maxX, Rectangle r, int i) {
TreePath path = getPathForRow(i);
DefaultMutableTreeNode node = (DefaultMutableTreeNode) path.getLastPathComponent();
Object o = node.getUserObject();
if (o instanceof TableOfContents) {
TableOfContents toc = (TableOfContents) o;
String pn = Integer.toString(toc.getPage());
TreeCellRenderer tcr = getCellRenderer();
g2.setPaint(getTextSelectionColor(i, tcr));
int x1 = maxX - g2.getFontMetrics().stringWidth(pn);
// int y = (int) (.5 + r.y + (r.height + fm.getAscent()) * .5);
int y = r.y + ((Component) tcr).getBaseline(r.width, r.height);
g2.drawString(pn, x1, y);
int gap = 5;
int x2 = maxX - pageNumMaxWidth;
Stroke s = g2.getStroke();
g2.setStroke(READER);
g2.drawLine(r.x + r.width + gap, y, x2 - gap, y);
g2.setStroke(s);
}
}
private Paint getTextSelectionColor(int i, TreeCellRenderer renderer) {
Paint paint;
if (isSynth && isRowSelected(i) && renderer instanceof DefaultTreeCellRenderer) {
paint = ((DefaultTreeCellRenderer) renderer).getTextSelectionColor();
} else {
paint = getForeground();
}
return paint;
}
}