A Qt widget, subclass of QLineEdit, for entering commands, with features common in modern shells such as TAB-completion, history, history-search.

Demo application included.

Use the widget just like a QLineEdit widget.

Signals:

• execute(const QString &cmd) emitted when Return is pressed with some text typed in;
• askCompletion(const QString &cmd, int cursorPos) emitted when Tab is pressed;
• escape() emitted when Esc is pressed and the field is empty.

Slots:

• setHistory(const QStringList &history) for setting the history (the history is not managed by the widget, it must be maintained by the host application, e.g.: in reaction to the execute(const QString &cmd) signal, the command is executed, it is also appended to the history list, and setHistory(const QStringList &history) is called to sync the widget's history);
• setCompletion(const QStringList &completion) for setting the list of completion (in reaction to askCompletion(const QString &cmd, int cursorPos) signal);
• acceptCompletion() accepts the current completion (selected text); bound to Return key;
• cancelCompletion() discards the current completion (selected text); bound to Esc key;
• setToolTipAtCursor(const QString &tip) show a tooltip placed at cursor position (useful for implementing calltips).

If you want to contribute with development, fork and make a pull requests. PRs are very welcome!

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