java – 突出显示用于JTable文件处理的TableCell中的subString
作者：互联网
如何将包含在TableTell中的文本同步到JTextField(然后通过DocumentListener传递String到RowFilter),如果包含与JTextField / Document中的String值相同,
然后在同步的TableCell(s)中突出显示(意味着f.e.更改文本Color.Red)相同的文本
我知道通过使用一些黑客是可能的
1 /使用getTableCellRendererComponent
2 /使用prepareRenderer
是否存在另一种可能正确的方式
来自JTable教程的一点点修改代码
import java.awt.*;
import java.util.regex.PatternSyntaxException;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.table.*;
public class TableFilterSorter extends JPanel {
private boolean DEBUG = false;
private static final long serialVersionUID = 1L;
public TableFilterSorter() {
super(new BorderLayout(5, 5));
final JTextField filterCpText = new JTextField();
filterCpText.setFont(new Font("Serif", Font.BOLD, 28));
filterCpText.setForeground(Color.BLUE);
filterCpText.setBackground(Color.LIGHT_GRAY);
JPanel filterCpPanel = new JPanel();
filterCpPanel.setLayout(new BorderLayout(5, 5));
filterCpPanel.setBorder(BorderFactory.createEmptyBorder(1, 1, 1, 1));
filterCpPanel.setBackground(Color.LIGHT_GRAY);
filterCpPanel.setPreferredSize(new Dimension(300, 30));
filterCpPanel.add(filterCpText, BorderLayout.CENTER);
add(filterCpPanel, BorderLayout.NORTH);
final JTable table = new JTable(new MyTableModel());
table.setPreferredScrollableViewportSize(new Dimension(500, 160));
table.setFillsViewportHeight(true);
JScrollPane scrollPane = new JScrollPane(table);
add(scrollPane, BorderLayout.CENTER);
TableModel myTableModel = table.getModel();
final TableRowSorter<TableModel> sorter = new TableRowSorter<TableModel>(myTableModel);
table.setRowSorter(sorter);
filterCpText.getDocument().addDocumentListener(new DocumentListener() {
private void searchFieldChangedUpdate(DocumentEvent evt) {
String text = filterCpText.getText();
if (text.length() == 0) {
sorter.setRowFilter(null);
table.clearSelection();
} else {
try {
sorter.setRowFilter(RowFilter.regexFilter("(?i)" + text, 4));
table.clearSelection();
} catch (PatternSyntaxException pse) {
JOptionPane.showMessageDialog(null, "Bad regex pattern",
"Bad regex pattern", JOptionPane.ERROR_MESSAGE);
}
}
}
@Override
public void insertUpdate(DocumentEvent evt) {
searchFieldChangedUpdate(evt);
}
@Override
public void removeUpdate(DocumentEvent evt) {
searchFieldChangedUpdate(evt);
}
@Override
public void changedUpdate(DocumentEvent evt) {
searchFieldChangedUpdate(evt);
}
});
}
private class MyTableModel extends AbstractTableModel {
private static final long serialVersionUID = 1L;
private String[] columnNames = {"First Name", "Last Name", "Sport", "# of Years", "Vegetarian"};
private Object[][] data = {
{"Mary", "Campione", "Snowboarding", new Integer(5), false},
{"Alison", "Huml", "Rowing", new Integer(3), true},
{"Kathy", "Walrath", "Knitting", new Integer(2), false},
{"Sharon", "Zakhour", "Speed reading", new Integer(20), true},
{"Philip", "Milne", "Pool", new Integer(10), false},
{"Mary", "Campione", "Snowboarding", new Integer(5), false},
{"Alison", "Huml", "Rowing", new Integer(3), true},
{"Kathy", "Walrath", "Knitting", new Integer(2), false},
{"Sharon", "Zakhour", "Speed reading", new Integer(20), true},
{"Philip", "Milne", "Pool", new Integer(10), false},};
@Override
public int getColumnCount() {
return columnNames.length;
}
@Override
public int getRowCount() {
return data.length;
}
@Override
public String getColumnName(int col) {
return columnNames[col];
}
@Override
public Object getValueAt(int row, int col) {
return data[row][col];
}
@Override
public Class<?> getColumnClass(int c) {
return getValueAt(0, c).getClass();
}
@Override
public boolean isCellEditable(int row, int col) {
if (col < 2) {
return false;
} else {
return true;
}
}
@Override
public void setValueAt(Object value, int row, int col) {
if (DEBUG) {
System.out.println("Setting value at " + row + "," + col
+ " to " + value + " (an instance of " + value.getClass() + ")");
}
data[row][col] = value;
fireTableCellUpdated(row, col);
if (DEBUG) {
System.out.println("New value of data:");
printDebugData();
}
}
private void printDebugData() {
int numRows = getRowCount();
int numCols = getColumnCount();
for (int i = 0; i < numRows; i++) {
System.out.print(" row " + i + ":");
for (int j = 0; j < numCols; j++) {
System.out.print(" " + data[i][j]);
}
System.out.println();
}
System.out.println("--------------------------");
}
}
private static void createAndShowGUI() {
JFrame frame = new JFrame("TableDemo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
TableFilterSorter newContentPane = new TableFilterSorter();
newContentPane.setOpaque(true);
frame.setContentPane(newContentPane);
frame.setLocation(150, 150);
frame.pack();
frame.setVisible(true);
}
public static void main(String[] args) {
javax.swing.SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
createAndShowGUI();
}
});
}
}
解决方法:
JXTable可以通过荧光笔实现这一点 – 请参阅swinglabs-demos作为示例(搜索演示中的MatchingTextHighlighter) – 画家应用了背景突出显示.
您可以在渲染器中的某个位置手动执行此类操作.如果使用JLabel作为renderingComponent,您基本上必须找到需要背景突出显示的部分文本并绘制该区域的背景(下面是用于查找区域的代码片段,演示示例中的c& p).或者你可以考虑使用JTextField作为渲染组件：adv是Highlighter(来自javax.swing.text)是内置的,disadv是文本comps作为渲染器的常见问题;-)
/**
* Finds the rectangles that contain rendered characters that match the
* pattern.
*
* @param object an optional configuration parameter. This may be null.
* @param width width of the area to paint.
* @param height height of the area to paint.
* @return a <code>List</code> of <code>Rectangle</code>s marking characters
* to highlight
*/
protected List<Rectangle> findHighlightAreas(JLabel object, int width,
int height) {
String text = object.getText();
insets = object.getInsets(insets);
viewR.x = 0 + insets.left;
viewR.y = 0 + insets.bottom;
viewR.width = width - insets.right;
viewR.height = height - insets.top;
// Reset the text and view rectangle x any y coordinates.
// These are not set to 0 in SwingUtilities.layoutCompoundLabel
iconR.x = iconR.y = 0;
textR.x = textR.y = 0;
FontMetrics fm = object.getFontMetrics(object.getFont());
String clippedText = SwingUtilities.layoutCompoundLabel(object, fm,
text, object.getIcon(), object.getVerticalAlignment(), object
.getHorizontalAlignment(), object
.getVerticalTextPosition(), object
.getHorizontalTextPosition(), viewR, iconR, textR,
object.getIconTextGap());
int xOffset = calculateXOffset(object, viewR, textR);
String textToSearch = clippedText;
// Check to see if the text will be clipped
if (!object.getText().equals(clippedText)) {
// TODO There has to be a better way that assuming ellipses
// are the last characters of the text
textToSearch = clippedText.substring(0, clippedText.length() - 3);
}
return createHighlightAreas(textToSearch, fm, xOffset, height);
}
/**
* Creates the rectangles that contain matched characters in the given text.
*
* @param text the text to search
* @param fm the font metrics of the rendered font
* @param xOffset the x offset at which text rendering starts
* @param height the height of painted highlights
* @return a <code>List</code> of highlight areas to paint
*/
protected List<Rectangle> createHighlightAreas(String text, FontMetrics fm,
int xOffset, int height) {
SearchPredicate predicate = (SearchPredicate) getHighlightPredicate();
Matcher matcher = predicate.getPattern().matcher(text);
List<Rectangle> highlightAreas = null;
int startFrom = 0;
while (startFrom < text.length() && matcher.find(startFrom)) {
if (highlightAreas == null) {
highlightAreas = new ArrayList<Rectangle>();
}
int start = matcher.start();
int end = matcher.end();
if (start == end) {
// empty matcher will cause infinite loop
break;
}
startFrom = end;
int highlightx;
int highlightWidth;
if (start == 0) {
// start highlight from the start of the field
highlightx = textR.x + xOffset;
} else {
// Calculate the width of the unhighlighted text to
// get the start of the highlighted region.
String strToStart = text.substring(0, start);
highlightx = textR.x + fm.stringWidth(strToStart) + xOffset;
}
// Get the width of the highlighted region
String highlightText = text.substring(start, end);
highlightWidth = fm.stringWidth(highlightText);
highlightAreas.add(new Rectangle(highlightx, 0, highlightWidth,
height));
}
if (highlightAreas == null) {
highlightAreas = Collections.emptyList();
} else {
coalesceHighlightAreas(highlightAreas);
}
return highlightAreas;
}
/**
* Joins highlight rectangles that mark adjacent horizontal areas into
* single rectangles. This is useful to renderers that vary horizontally,
* such a horizontal gradient - the gradient will not restart when there are
* two adjacent highlight areas.
*
* @param highlightAreas a <code>List</code> of <code>Rectangle</code>s.
*/
protected void coalesceHighlightAreas(List<Rectangle> highlightAreas) {
Collections.sort(highlightAreas, X_AXIS_RECTANGLE_COMPARATOR);
int i = 0;
while (i < highlightAreas.size() - 1) {
Rectangle r1 = highlightAreas.get(i);
Rectangle r2 = highlightAreas.get(i + 1);
if (r1.x + r1.width == r2.x) {
r1.width += r2.width;
highlightAreas.remove(i + 1);
} else {
i++;
}
}
}
/**
* Calculates the x offset of highlights based on component orientation and
* text direction.
*
* @param component the renderer component
* @param viewR the view rectangle of the renderer component
* @param textR the text rectangle of the renderer component
* @return the number of pixels to offset the highlight from the left edge
* of the component
*/
protected int calculateXOffset(JLabel component, Rectangle viewR,
Rectangle textR) {
int horizAlignment = component.getHorizontalAlignment();
boolean leftToRight = component.getComponentOrientation()
.isLeftToRight();
if (horizAlignment == SwingConstants.LEFT
|| (horizAlignment == SwingConstants.LEADING && leftToRight)
|| (horizAlignment == SwingConstants.TRAILING && !leftToRight)) {
return 0;
} else if (horizAlignment == SwingConstants.RIGHT
|| (horizAlignment == SwingConstants.TRAILING && !leftToRight)
|| (horizAlignment == SwingConstants.LEADING && leftToRight)) {
return viewR.width - textR.width;
} else if (horizAlignment == SwingConstants.CENTER) {
return (viewR.width - textR.width) / 2;
}
throw new AssertionError("Unknown horizonal alignment "
+ horizAlignment);
}
标签：rowfilter,highlighting,java,swing,jtable 来源： https://codeday.me/bug/20190916/1807824.html