Re: Decreasing seams in scaled windows

The lines of markers and indicators can be made thicker with the
SCI_MARKERSETSTROKEWIDTH and SCI_INDICSETSTROKEWIDTH APIs, This is not
automatic so requires application code.

Changing Haven's MainWindow::rescale code like the following switches
between single pixel and double pixel lines at 170%. The points at
which different thicknesses are applied is up to the application
designer. It looks like
https://www.scintilla.org/QtScaleStrokeWidth.png at 175% on Windows.

void MainWindow::rescale() {
        const qreal scale = isScaled() ? devicePixelRatioF() : 1.0;
        Call(SCI_SETMARGINWIDTHN, 0, lround(scale * 40));
        Call(SCI_SETMARGINWIDTHN, 1, lround(scale * 16));
        Call(SCI_SETMARGINWIDTHN, 2, lround(scale * 13));

        const int strokeWidth = scale > 1.7 ? 200 : 100;
        for (int mark = SC_MARKNUM_FOLDEREND; mark <=
SC_MARKNUM_FOLDEROPEN; mark++) {
                Call(SCI_MARKERSETSTROKEWIDTH, mark, strokeWidth);
        }

        Call(SCI_INDICSETSTROKEWIDTH, INDIC_CONTAINER, strokeWidth);
}


Neil

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