http://www.java2s.com/Code/Java/SWT-JFace-Eclipse/SWTStyledText.htm 下有个SWT的StyledText例子
这个例子的演示效果为：按下F1后，界面开始使用粗体，再按一下，取消粗体
如何添加对数字字符着色的功能点？
解决方案如下：
①添加private boolean doColor = false;
②修改这段代码，添加对数字字符的判断（48-57是键盘上对应的那些数字，其余的是数字键盘对应的0到9）
styledText.addKeyListener(new KeyAdapter() {
public void keyPressed(KeyEvent e) {
switch (e.keyCode) {
case SWT.F1:
toggleBold();
break;
case 48:
case 49:
case 50:
case 51:
case 52:
case 53:
case 54:
case 55:
case 56:
case 57:
case 16777264:
case 16777265:
case 16777266:
case 16777267:
case 16777268:
case 16777269:
case 16777270:
case 16777271:
case 16777272:
toggleColoring();
break;
default:
// ignore everything else
}
③仿照toggleBold() 写出toggleColoring()
private void toggleColoring() {
Point selectionRange = styledText.getSelectionRange();
StyleRange style = new StyleRange(
selectionRange.x,
selectionRange.y,
ColorConstants.blue,
null,
SWT.NORMAL);
styledText.setStyleRange(style);
doColor = true;
}
④修改
styledText.addExtendedModifyListener(new ExtendedModifyListener() {
public void modifyText(ExtendedModifyEvent event) {
if (doBold) {
StyleRange style = new StyleRange(
event.start,
event.length,
null,
null,
SWT.BOLD);
styledText.setStyleRange(style);
}
}
});
这样一来，当敲出数字的时候，数字就被染上色了。
注意
if (doColor) {
..
event.start - event.length,
...
}
里的这句代码event.start - event.length，能保证刚刚被敲出的数字也被着色！如果仿照if(doBold)里的写成event.start ，则不可以！
自问自答，希望给后来者一些帮助
抱歉，写错了，第4个步奏为： styledText.addExtendedModifyListener(new ExtendedModifyListener() { public void modifyText(ExtendedModifyEvent event) {if (doColor) { StyleRange style = new StyleRange( event.start - event.length, event.length, ColorConstants.blue, null, SWT.NORMAL); styledText.setStyleRange(style); doColor = false; } } });
附带一张运行图
package swt_jface.demo4;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;
public class WrapLines {
Display display = new Display();
Shell shell = new Shell(display);
Text text1;
Text text2;
String line = "abcdefghijklmnopqrstuvwxyz0123456789";
private void init() {
text1 = new Text(shell, SWT.BORDER | SWT.MULTI);
//text.setTextLimit(12);
text1.setText(line);
text2 = new Text(shell, SWT.BORDER | SWT.WRAP);
text2.setText(line);
}
public WrapLines() {
shell.setLayout(new GridLayout(2, true));
(new Label(shell, SWT.NULL)).setText("SWT.BORDER |\nSWT.MUTLI");
(new Label(shell, SWT.NULL)).setText("SWT.BORDER |\nSWT.WRAP");
init();
GridData gridData = new GridData(GridData.FILL_BOTH);
text1.setLayoutData(gridData);
gridData = new GridData(GridData.FILL_BOTH);
text2.setLayoutData(gridData);
shell.pack();
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
display.dispose();
}
public static void main(String[] args) {
new WrapLines();
}
}
