diff options
Diffstat (limited to 'silx/gui/_glutils/font.py')
| -rw-r--r-- | silx/gui/_glutils/font.py | 32 |
1 files changed, 22 insertions, 10 deletions
diff --git a/silx/gui/_glutils/font.py b/silx/gui/_glutils/font.py index 566ae49..2be2c04 100644 --- a/silx/gui/_glutils/font.py +++ b/silx/gui/_glutils/font.py @@ -98,27 +98,39 @@ def rasterText(text, font, _logger.info("Trying to raster empty text, replaced by white space") text = ' ' # Replace empty text by white space to produce an image + if (devicePixelRatio != 1.0 and + not hasattr(qt.QImage, 'setDevicePixelRatio')): # Qt 4 + _logger.error('devicePixelRatio not supported') + devicePixelRatio = 1.0 + if not isinstance(font, qt.QFont): font = qt.QFont(font, size, weight, italic) + # get text size + image = qt.QImage(1, 1, qt.QImage.Format_RGB888) + painter = qt.QPainter() + painter.begin(image) + painter.setPen(qt.Qt.white) + painter.setFont(font) + bounds = painter.boundingRect( + qt.QRect(0, 0, 4096, 4096), qt.Qt.TextExpandTabs, text) + painter.end() + metrics = qt.QFontMetrics(font) - size = metrics.size(qt.Qt.TextExpandTabs, text) - bounds = metrics.boundingRect( - qt.QRect(0, 0, size.width(), size.height()), - qt.Qt.TextExpandTabs, - text) - if (devicePixelRatio != 1.0 and - not hasattr(qt.QImage, 'setDevicePixelRatio')): # Qt 4 - _logger.error('devicePixelRatio not supported') - devicePixelRatio = 1.0 + # This does not provide the correct text bbox on macOS + # size = metrics.size(qt.Qt.TextExpandTabs, text) + # bounds = metrics.boundingRect( + # qt.QRect(0, 0, size.width(), size.height()), + # qt.Qt.TextExpandTabs, + # text) # Add extra border and handle devicePixelRatio width = bounds.width() * devicePixelRatio + 2 # align line size to 32 bits to ease conversion to numpy array width = 4 * ((width + 3) // 4) image = qt.QImage(width, - bounds.height() * devicePixelRatio, + bounds.height() * devicePixelRatio + 2, qt.QImage.Format_RGB888) if (devicePixelRatio != 1.0 and hasattr(image, 'setDevicePixelRatio')): # Qt 5 |