PyQt 5.9.2、Python 3.6.6、Windows 10我想根据其容器小部件的当前宽度动态隐藏/显示小部件。如果space小于整个宽度的 10% 按钮“一”被隐藏,则按钮“二”。当用户使容器变大时,按钮会再次显示:“两个”,然后是“一个”。这是我的实现的一个非常基本的版本,它大部分都有效,但有一个大问题。我开始调整大小,按钮“一”隐藏,但随后出现了一些限制,容器无法再缩小。我必须释放鼠标按钮并再次启动该过程以隐藏按钮“二”。import sysfrom PyQt5 import QtWidgetsform, space, widgets = None, None, Nonedef resize_event(event): if free_space_width() < 0: visible_w = [w for w in widgets if w.isVisible()] if len(visible_w) > 1: # do not hide the last one for w in visible_w: w.hide() if free_space_width(w.width()) >= 0: break # enough space else: invisible_w = [w for w in widgets if not w.isVisible()] for w in reversed(invisible_w): if free_space_width(-w.width()) < 0: break w.show()def free_space_width(shift=0): "Free space should be at least 10% of the bar width" return space.width() + shift - 0.1 * form.width()if __name__ == '__main__': app = QtWidgets.QApplication(sys.argv) form = QtWidgets.QWidget() layout = QtWidgets.QHBoxLayout(form) layout.setSpacing(0) # for simplicity form.resize(480, 64) form.resizeEvent = resize_event widgets = [QtWidgets.QPushButton("test button %d" % (i + 1), form) for i in range(3)] for i in widgets: layout.addWidget(i) space = QtWidgets.QWidget(form) # stretchable space s_policy = space.sizePolicy() s_policy.setHorizontalStretch(1) space.setSizePolicy(s_policy) layout.addWidget(space) form.show() sys.exit(app.exec_())
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largeQ
TA贡献2039条经验 获得超8个赞
那么一些约束就出现了,容器的大小不能减小
layout.setSizeConstraint(QtWidgets.QLayout.SetNoConstraint)
我认为你应该像这样在这段代码下实现它。
layout = QtWidgets.QHBoxLayout(form)
layout.setSpacing(0) # for simplicity
layout.setSizeConstraint(QtWidgets.QLayout.SetNoConstraint)
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