Hello all, Here is a patch for the Qt driver. It fixes a couple of minor bugs, and it also adds the possibility to pass PLplot command line arguments to the qtext driver (embedded widget in a Qt application) and handles flush and clear for the interactive devices. However, there still are issues with these implementations:
- Command line arguments for the qtext driver: The user has to pass argc and argv to plsetqtdev (the function that associates the widget to the device). But in order to create a QApplication, the user has to pass argc and argv to the QApplication constructor before, which filters out the arguments it recognizes, including the "-bg" argument (conflict between Qt and PLplot). I believe the only way to fix this other than changing "-bg" into something else in PLplot is to make a deep copy of argv before passing it to the QApplication constructor and passing this copy to plsetqtdev. Thus, it's up to the application developer to handle such matters. You can see this issue with qt_example: "qt_example -bg FF000" will display a Qt warning message and go on with the default bg colour "qt_example -cmap0 _whatever_" will work properly - flushing: it works, but example x17c is *slow* (about 30 times slower than xwin on my system!). This is because the Qt driver will replot everything from the last clear() everytime the flush is done. This is linked to the way the driver was designed, and despite my efforts, I haven't found a quick and easy way to fix this. I still plan to fix this, but it will require some redesign. In the meantime, people who wish to use the Qt driver to animate stuff may be happy to use the new "lines_antialiasing" command-line option which allows to (dis/en)able lines antialiasing (enabled by default), which makes the driver about 5 times slower than xwin. Despite these flaws, as this update adds features and should not break anything, I believe it's worth adding to the svn trunk. Alban
qt_patch.gz
Description: qt_patch.gz
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