Method pqPythonTextArea

Qt/Python/pqPythonTextArea.cxx:14–79

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pqPythonTextArea::pqPythonTextArea(QWidget* parent)
  : QWidget(parent)
  , TextEdit(new QTextEdit(this))
  , LineNumberArea(new pqPythonLineNumberArea(this, *this->TextEdit))
  , SyntaxHighlighter(new pqPythonSyntaxHighlighter(this, *this->TextEdit))
  , FileIO(new pqPythonFileIO(this, *this->TextEdit))
{
  this->TextEdit->setUndoRedoEnabled(false);
  this->TextEdit->setAcceptDrops(false);
  this->TextEdit->setAcceptRichText(false);
  this->TextEdit->setContextMenuPolicy(Qt::NoContextMenu);

  // Install the Undo/Redo event filter
  this->TextEdit->installEventFilter(this);

  // Prepare the HBoxLayout for the text widget and the line area widget
  QHBoxLayout* layout = new QHBoxLayout();
  layout->addWidget(this->LineNumberArea);
  layout->addWidget(this->TextEdit);
  layout->setContentsMargins(0, 0, 0, 0);
  layout->setSpacing(0);
  this->setLayout(layout);

  this->connect(this->TextEdit.data(), &QTextEdit::cursorPositionChanged,
    [this]() { this->LineNumberArea->update(); });

  this->connect(this->TextEdit->document(), &QTextDocument::blockCountChanged,
    [this](int) { this->LineNumberArea->updateGeometry(); });

  this->connect(this->TextEdit->verticalScrollBar(), &QScrollBar::valueChanged,
    [this](int) { this->LineNumberArea->update(); });

  this->connect(this->TextEdit.data(), &QTextEdit::textChanged,
    [this]()
    {
      const QString text = this->TextEdit->toPlainText();
      const int cursorPosition = this->TextEdit->textCursor().position();

      // Push a new command to the stack (which calls redo, thus applying the command)
      this->UndoStack.push(new pqPythonUndoCommand(
        *this->TextEdit, this->SyntaxHighlighter, this->lastEntry, { text, cursorPosition }));

      // Save the last entry
      this->lastEntry = { text, cursorPosition };

      const int vScrollBarValue = this->TextEdit->verticalScrollBar()->value();
      this->TextEdit->verticalScrollBar()->setValue(vScrollBarValue);

      const int hScrollBarValue = this->TextEdit->horizontalScrollBar()->value();
      this->TextEdit->horizontalScrollBar()->setValue(hScrollBarValue);

      this->FileIO->contentChanged();
    });

  this->connect(
    this->FileIO.data(), &pqPythonFileIO::fileSaved, this, &pqPythonTextArea::fileSaved);
  this->connect(
    this->FileIO.data(), &pqPythonFileIO::fileOpened, this, &pqPythonTextArea::fileOpened);