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我有一个SWT文本字段,其内容长度将动态变化。我需要使整个文本可见。我正在使用下面的代码来做到这一点。动态调整SWT文本字段的大小
public class MyDynamicDialog extends TrayDialog {
Text errorMessageText;
ScrolledComposite scrolledComposite;
Shell shell;
DynamicData dynamicData;
public MyDynamicDialog (final Shell shell) {
super(shell);
this.shell = shell;
}
public MyDynamicDialog (final Shell shell, final DynamicData dynamicData) {
super(shell);
this.shell = shell;
this.dynamicData = dynamicData;
}
@Override
protected Control createDialogArea(final Composite parent) {
final GridLayout layout = new GridLayout();
parent.setLayout(layout);
this.scrolledComposite = new ScrolledComposite(parent, SWT.V_SCROLL | SWT.BORDER);
this.scrolledComposite.setExpandHorizontal(true);
this.scrolledComposite.setExpandVertical(false);
final Composite composite = new Composite(this.scrolledComposite, SWT.NONE);
final GridLayout gridLayout = new GridLayout();
gridLayout.numColumns = 2;
composite.setLayout(gridLayout);
composite.setSize(400, 400);
this.scrolledComposite.setContent(composite);
this.scrolledComposite.addControlListener(new ControlAdapter() {
@Override
public void controlResized(final ControlEvent e) {
final Rectangle clientArea =
MyDynamicDialog.this.scrolledComposite.getClientArea();
final Point minSize = MyDynamicDialog.this.scrolledComposite.getContent().computeSize(clientArea.width, SWT.DEFAULT);
MyDynamicDialog.this.scrolledComposite.getContent().setSize(minSize);
}
});
createErrorMessageText(composite);
return parent;
}
private void createErrorMessageText(final Composite parent) {
final GridData errText = new GridData(/*200, SWT.DEFAULT*/);
errText.grabExcessHorizontalSpace = true;
errText.horizontalSpan = 3;
errText.horizontalAlignment = GridData.FILL;
this.errorMessageText = new Text(parent, SWT.READ_ONLY /*| SWT.WRAP | SWT.MULTI*/);
this.errorMessageText.setLayoutData(errText);
this.errorMessageText.addModifyListener(new ModifyListener() {
public void modifyText(final ModifyEvent e) {
final int columns = MyDynamicDialog.this.errorMessageText.getText().length() + 3;
final GC gc = new GC (MyDynamicDialog.this.errorMessageText);
final FontMetrics fm = gc.getFontMetrics();
final int width = columns * fm.getAverageCharWidth();
final int height = fm.getHeight();
gc.dispose();
MyDynamicDialog.this.errorMessageText.setSize (MyDynamicDialog.this.errorMessageText.computeSize (width, height));
MyDynamicDialog.this.errorMessageText.redraw();
MyDynamicDialog.this.errorMessageText.getParent().layout();
}
});
}
}
有了这个代码,当文本是大,它超出屏幕。我无法在运行时调整文本字段的大小。我还尝试在调整文本框大小后再次调用滚动合成器上的侦听器。但没有一个可行。请指出可能是错的。