Qt大作业————记事本——Day4

剪切 复制 粘贴等操作

//剪切
void MainWindow::on_actionCut_triggered()
{
    ui->textEdit->cut();
    ui->actionPaste->setEnabled(true);
}

//撤销
void MainWindow::on_actionUndo_triggered()
{
    ui->textEdit->undo();
}

//复制
void MainWindow::on_actionCopy_triggered()
{
    ui->textEdit->copy();
    ui->actionPaste->setEnabled(true);
}

//粘贴
void MainWindow::on_actionPaste_triggered()
{
    ui->textEdit->paste();
}

//恢复
void MainWindow::on_actionHuiFu_triggered()
{
    ui->textEdit->redo();
}

void MainWindow::on_textEdit_undoAvailable(bool b)
{
   ui->actionUndo->setEnabled(b);
}

void MainWindow::on_textEdit_copyAvailable(bool b)
{
     ui->actionCopy->setEnabled(b);
     ui->actionCut->setEnabled(b);
}

void MainWindow::on_textEdit_redoAvailable(bool b)
{
    ui->actionHuiFu->setEnabled(b);
}