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Type: Bug
Resolution: Done
Priority: P1: Critical
Fix Version/s: 5.15.3, 5.15.6, 6.2.0 Beta4, 6.3.0 Alpha
Affects Version/s: 5.15.5, 6.1.2
Component/s: Charts
Labels:
- Reported_by_support_standard
Environment:
Win 10, MSVC2019

Commits:
4b056cf30d5870f73ec467a963fcaaa6ec6fab46 (qt/qtcharts/dev) 49f0741a2d4c2387b924ef09ff0a25075728a66f (qt/qtcharts/6.1) cd24c65966db0398b17526560f75b258a6cf5952 (qt/qtcharts/6.2) 5e97554bdd41d7bbdf4c5386cd0ccdb3d4d519ff (qt/tqtc-qtcharts/5.15)

Some axis labels are missing from both vertical and horizontal axes even in simple examples. The problem did not exist in 5.15.4.

Steps to reproduce the problem:

Run the attached example

EDIT by jimis:

The X axis label disappearing is because of this check in horizontalaxis.cpp, function HorizontalAxis::updateGeometry():

        // Label overlap detection - compensate one pixel for rounding errors.
        // This is not needed for color axis as its labels don't collide with other labels
        if ((labelItem->pos().x() < last_label_max_x && labelItem->toPlainText() == ellipsis)
            || forceHide
            || (labelItem->pos().x() + (widthDiff / 2.0))       < (axisRect.left() - 1.0)    // This test comes out true!!!
            || (labelItem->pos().x() + (widthDiff / 2.0) - 1.0) > axisRect.right()) {
            if (axis()->type() != QAbstractAxis::AxisTypeColor)
                labelItem->setVisible(false);
        } else {
            labelItem->setVisible(true);
            last_label_max_x = boundingRect.width() + labelItem->pos().x();
        }