chore: use tabStopDistance instead of tabStopWidth

[ouuan]

See:

• https://doc.qt.io/qt-5.14/qtextedit-obsolete.html
• https://doc.qt.io/qt-5/qtextedit.html#tabStopDistance-prop

[knarfS]

Please check for Qt version (>=5.10) when using tabStopDistance, as I have to use Qt 5.7.1 for cross compiling.

[ouuan]

Please check for Qt version (>=5.10) when using tabStopDistance, as I have to use Qt 5.7.1 for cross compiling.

So should I close this for backwards compatibility?

[ouuan]

Or check Qt version then use different functions?

[knarfS]

Checking the Qt version and using tabStopDistance for version >= 5.10 and else using tabStopWidth should be fine. This way QCodeEditor will use the new property if available but remains backward compatible.

Something like:

#if QT_VERSION >= 0x050A00
    const int defaultIndent = tabStopDistance() / fontMetrics().averageCharWidth();
#else
    const int defaultIndent = tabStopWidth() / fontMetrics().averageCharWidth();
#endif