问题
I have a few things for a QLineEdit's QCompleter I'm interested in customizing. I want to make it behave similar to the address / search bar in Chrome.
- How can I limit the number of rows that are displayed? For example, even if there are 15 matches, I only want the QCompleter to show 5.
- How can I resize the popup window? For example, I want to make the popup window nice and snug. As per the above example, I want the popup window to resize to 5 rows exactly without any showing any ugly scroll bars.
- How can I move the popup window? For example, I want to adjust the vertical position of the popup window so that it's slightly below the parent widget.
- How can I format the shown popup window's list items? For example, I want to bold the part of the word that is matching.
回答1:
- To limit the number of rows: change the model to a QStringListModel using QCompleter.setModel, and set a fixed number of items before the popup is shown. Also ensure that maxVisibleItems is set appropriately (default is seven).
- The popup window should resize to the correct height
automatically. The width of the popup can be calculated by adding together the
width of the margins (
popup.width() - popup.viewport().width()), the width of the frame (2 * popup.frameWidth()), and the width of the longest string (popup.fontMetrics().boundingRect(string).width()). - The positioning (and width) of the popup can be controlled by passing an
appropriate
QRectto QCompleter.complete. - The format of the list items could be controlled by setting an item delegate on the popup. See this answer for an example of a rich-text item delegate. (But note that this will effect how the popup width is calculated).
回答2:
Though I've never tried the Same The Documentation Clearly States to use maxVisibleItems(int maxItem) to restrict number items visible.
and as with customization of the PopUp Window I thing You need to make a subclass of QAbstractItemView and pass it on QCompleter::setPopup(QAbstractItemView * popup)
set setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff)
来源：https://stackoverflow.com/questions/7946359/how-can-i-customize-the-qcompleter-popup-window-in-pyqt