Qwidget剪贴板的使用

/.h文件、
 #ifndef CLIPBOARDDEMO_H
 #define CLIPBOARDDEMO_H#include <QWidget>
class ClipboardDemo : public QWidget
 {
     Q_OBJECTpublic:
     ClipboardDemo(QWidget *parent = 0);private slots:
     void setClipboard();
     void getClipboard();
 };#endif // CLIPBOARDDEMO_H
 ///.cpp文件
 #include "clipboarddemo.h"
 #include <QVBoxLayout>
 #include <QTextEdit>
 #include <QLabel>
 #include <QPushButton>
 #include <QMessageBox>
 #include <QApplication>
 #include <QClipboard>
 ClipboardDemo::ClipboardDemo(QWidget *parent)
     : QWidget(parent)
 {
     QVBoxLayout *mainLayout = new QVBoxLayout(this);
     QHBoxLayout *northLayout = new QHBoxLayout;
     QHBoxLayout *southLayout = new QHBoxLayout;    QTextEdit *editor = new QTextEdit;
     QLabel *label = new QLabel;
     label->setText("Text Input: ");
     label->setBuddy(editor);
     QPushButton *copyButton = new QPushButton;
     copyButton->setText("Set Clipboard");
     QPushButton *pasteButton = new QPushButton;
     pasteButton->setText("Get Clipboard");    northLayout->addWidget(label);
     northLayout->addWidget(editor);
     southLayout->addWidget(copyButton);
     southLayout->addWidget(pasteButton);
     mainLayout->addLayout(northLayout);
     mainLayout->addLayout(southLayout);    connect(copyButton, SIGNAL(clicked()), this, SLOT(setClipboard()));
     connect(pasteButton, SIGNAL(clicked()), this, SLOT(getClipboard()));
 }void ClipboardDemo::setClipboard()
 {
     QClipboard *board = QApplication::clipboard();
     board->setText("Text from Qt Application");
 }void ClipboardDemo::getClipboard()
 {
     QClipboard *board = QApplication::clipboard();
     QString str = board->text();
     QMessageBox::information(NULL, "From clipboard", str);
 }