C++ QTextEdit::clear方法代码示例

void
CSAVE_WORKSHEET::
saveWorksheet(QTabWidget * tabWidget)
{
    QTextEdit * textEdit = new QTextEdit();
    QString fileName = QFileDialog::getSaveFileName(this,tr("Save PM Worksheet"), "",tr("PM Worksheet (*.pmw);;All Files (*)"));
    textEdit->clear();
    textEdit->hide();

    if (fileName.isEmpty())
            return;
    else
    {
        QFile file(fileName);
        QTextStream out(&file);

        if (!file.open(QIODevice::WriteOnly))
        {
            QMessageBox::information(this, tr("Unable to open file"),file.errorString());
            return;
        }

        for ( int i = 0; i < tabWidget->count(); i++ )
        {
            tabWidget->setCurrentIndex(i); // set to Master PM
            QTableWidget *table = dynamic_cast<QTableWidget *>(tabWidget->currentWidget()); // get control

            QString itemData;
            textEdit->append("[ SECTION ] "+tabWidget->tabText(i));

            for ( int j = 0; j < table->rowCount(); j++ )
            {
                for ( int k = 0; k < 12; k++ )
                {
                     itemData.append(table->item(j,k)->text()+" | ");
                }

                textEdit->append(itemData.trimmed());
                itemData.clear();
            }

            out << textEdit->toPlainText() << endl;
            textEdit->clear();
        }
    }

    tabWidget->setCurrentIndex(2);
    QMessageBox::information(this, "Information", "\n Saved worksheet successfully.", QMessageBox::Ok);
}

void ClipboardDialog::on_listWidgetFormats_currentItemChanged(
        QListWidgetItem *current, QListWidgetItem *)
{
    ui->actionRemove_Format->setEnabled(current != NULL);

    QTextEdit *edit = ui->textEditContent;
    QString mime = current ? current->text() : QString();

    edit->clear();
    const QByteArray bytes = m_data.value(mime).toByteArray();
    if ( mime.startsWith(QString("image")) ) {
        edit->document()->addResource( QTextDocument::ImageResource,
                                       QUrl("data://1"), bytes );
        edit->setHtml( QString("<img src=\"data://1\" />") );
    } else {
        QTextCodec *codec = QTextCodec::codecForName("utf-8");
        if (mime == QLatin1String("text/html"))
            codec = QTextCodec::codecForHtml(bytes, codec);
        else
            codec = QTextCodec::codecForUtfText(bytes, codec);
        edit->setPlainText( codec ? codec->toUnicode(bytes) : QString() );
    }

    ui->labelProperties->setText(
        tr("<strong> mime:</strong> %1 <strong>size:</strong> %2 bytes")
            .arg(escapeHtml(mime))
            .arg(QString::number(bytes.size())));
}

void ExplorerPane::clearErrors()
{
    QTextEdit *errorWidget = dynamic_cast<QTextEdit *>(errorsPage);
    if (errorWidget)
    {
        errorWidget->clear();
    }
}

void ExplorerPane::clearSimulator()
{
    // Output page
    QTextEdit *outputWidget = dynamic_cast<QTextEdit *>(outputPage);
    if (outputWidget)
    {
        outputWidget->clear();
    }
}

/**
 * Clears text from the currently selected tab
 * @brief MainWindow::clearTab
 */
void MainWindow::clearTab()
{
    if(ui->tabgrpConversations->currentIndex() == 0)
        ui->txtConvo->clear();
    else
    {
        QTextEdit* txtConv = ui->tabgrpConversations->currentWidget()->findChild<QTextEdit*>(CONVO_TAB_TXT_ID);
        txtConv->clear();
    }
}

/**
 * Gets the conversation corresponding to the
 * currently selected tab, and sends whatever's in its
 * message text-box to all participants of the conversation.
 * @brief MainWindow::sendConvoMessage
 */
void MainWindow::sendConvoMessage()
{
    Conversation *cdata = convos->at(ui->tabgrpConversations->currentIndex()-1);
    QTextEdit* txtMsg = ui->tabgrpConversations->currentWidget()->findChild<QTextEdit*>(CONVO_TAB_MSG_ID);
    QTextEdit* txtConv = ui->tabgrpConversations->currentWidget()->findChild<QTextEdit*>(CONVO_TAB_TXT_ID);

    if(txtMsg->toPlainText().length() > 0)
    {
        controller->sendConvoMessage(cdata, txtMsg->toPlainText());
        addTextToConvo(txtConv, controller->myName() + "|" + txtMsg->toPlainText());
        txtMsg->clear();
    }
}

//слот - удаление корабля
void MyServer::slotDeleteShip(){

    //считываем номер текущей страницы
    //(номер удаляемого корабля)
    int num = logNumber->text().toInt();

    //получаем адрес лога удаляемого корабля
    QTextEdit *txt = (QTextEdit*) txtStack->widget(num-1);

    int idOfDeleted = shipList.at(num-1)->id;

    //удаляем корабль из вектора
    shipList.remove(num-1);

    shipCounter--;

    //если это был последний корабль
    if(shipCounter==0){
        txt->clear();                           //очищаем лог
        deleteShipButton->setEnabled(false);    //отключаем кнопку удаления
    }
    //иначе
    else{

        txtStack->removeWidget(txt);  //удаляем лог

        if(num > shipCounter){                            //если номер лога больше количества кораблей
            logNumber->setText(QString::number(num-1));   //обновляем номер
            txtStack->setCurrentIndex(num-2);
        }
        else{
            txtStack->setCurrentIndex(num-1);
        }

        delete txt;
    }

    //если в итоге оказались на первом логе
    if(!txtStack->currentIndex()){
        prevButton->setEnabled(false);
    }

    //если в итоге оказались на последнем логе
    if((txtStack->currentIndex()+1)==shipCounter){
        nextButton->setEnabled(false);
    }

    messageLabel->setText(QString("Ship (ID: %1) - deleted").arg(idOfDeleted+1));
    logNumbersOfRemovedShips.append(num);         //добавить в список номер лога удаленного корабля

}

    void editMenuActivated(QAction *action)
    {
        QWidget* w = qApp->focusWidget();
        QTextEdit* te = qobject_cast<QTextEdit*>(w);
        QLineEdit* le = qobject_cast<QLineEdit*>(w);

        if (action == selectAction) {
            highlighting = this;
            return;
        }
        highlighting = 0;

        if (action == copyAction) {
            if (te) {
                if (te->hasEditFocus()) {
                    te->copy();
                } else {
                    QTextCursor c = te->textCursor();
                    te->selectAll();
                    te->copy();
                    te->setTextCursor(c);   // reset selection
                }
            } else if (le) {
                if (le->hasEditFocus()) {
                    le->copy();
                } else {
                    qApp->clipboard()->setText(le->text());
                }
            }
        } else if (action == pasteAction) {
            // assumes clipboard is not empty if 'Paste' is able to be
            // activated, otherwise the line/textedit might be cleared
            // without pasting anything back into it
            if (te) {
                if (!te->hasEditFocus())
                    te->clear();
                te->paste();
                if (!te->hasEditFocus()) {
                    te->moveCursor(QTextCursor::Start);
                    te->ensureCursorVisible();
                }
            } else if (le) {
                if (!le->hasEditFocus())
                    le->clear();
                le->paste();
                if (!le->hasEditFocus())
                    le->home(false);
            }
        }
    }

void
CSAVE_WORKSHEET::
updateMasterPm( QTabWidget * tabWidget)
{
    QTextEdit * textEdit = new QTextEdit();
    textEdit->clear();
    textEdit->hide();
    tabWidget->hide();

    // reset tab3 row count
    tabWidget->setCurrentIndex(3);
    QTableWidget * table3 = dynamic_cast<QTableWidget *>(tabWidget->currentWidget());
    table3->setRowCount(0);

    for ( int i = 0; i < tabWidget->count()-1; i++ )
    {
        tabWidget->setCurrentIndex(i);
        QTableWidget *table = dynamic_cast<QTableWidget *>(tabWidget->currentWidget()); // get control
        for ( int j = 0; j < table->rowCount(); j++ )
        {
            QString itemData;
            for ( int k = 0; k < 12; k++ )
                 itemData.append(table->item(j,k)->text().trimmed().toLatin1()+" | ");

            table3->insertRow(table3->rowCount());
            for ( int col = 0; col < 12; col++ )
            {
                QTableWidgetItem * item = new QTableWidgetItem(itemData.split("|").at(col).trimmed());

                if ( col == 0 )
                    item->setTextAlignment(Qt::AlignVCenter | Qt::AlignLeft);
                else
                    item->setTextAlignment(Qt::AlignCenter);

                item->setFlags(item->flags() & ~Qt::ItemIsEditable);
                table3->setItem(table3->rowCount()-1,col,item);
            }
        }
    }
    tabWidget->show();
}

void ClipboardDialog::on_listWidgetFormats_currentItemChanged(
        QListWidgetItem *current, QListWidgetItem *)
{
    ui->actionRemove_Format->setEnabled(current != NULL);

    QTextEdit *edit = ui->textEditContent;
    QString mime = current ? current->text() : QString();

    edit->clear();
    const QByteArray bytes = m_data.value(mime).toByteArray();
    if ( mime.startsWith(QString("image")) ) {
        edit->document()->addResource( QTextDocument::ImageResource,
                                       QUrl("data://1"), bytes );
        edit->setHtml( QString("<img src=\"data://1\" />") );
    } else {
        edit->setPlainText( dataToText(bytes, mime) );
    }

    ui->labelProperties->setText(
                tr("<strong>Size:</strong> %1 bytes", "Size of data in bytes").arg(bytes.size()) );
}