QSpacerItem * my_spacer = new QSpacerItem(0,1000, QSizePolicy::Expanding, QSizePolicy::Expanding); I am supplying some example code. The goal is to show the hierarchy, and where QFormLayout would cause trouble.

2015年11月19日 · In pyQt5 , the QSpacerItem and QSizePolicy classes are now a part of QtWidgets so you'd want to create a vertical spacer in this manner... verticalSpacer = QtWidgets.QSpacerItem(20, 40, QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Expanding)

2019年7月2日 · groupBox2Layout->addWidget(groupBox2Spacer); masim.cpp:60:22: error: no matching member function for call to 'addWidget' qgridlayout.h:102:17: note: candidate function not viable: no known conversion from 'QSpacerItem *' to 'QWidget *' for 1st argument qgridlayout.h:103:10: note: candidate function not viable: requires at least 3 arguments, but ...

2013年12月8日 · A QSpacerItem is an adjustable blank space. Using vbox.addStretch(1) will add a zero-width spacer-item that expands vertically from the top of the layout downwards. Using hbox.addStretch(1) will add a zero-height spacer-item that expands horizontally from the left of the layout rightwards.

2014年3月4日 · QSpacerItem* spc = new QSpacerItem(5000000, 0, QSizePolicy::Expanding, QSizePolicy::Expanding); I wanted to know what was the correct way. I am currently setting the width to a very large number.

2015年9月30日 · spacerItem = QSpacerItem(20,80,QSizePolicy.Minimum,QSizePolicy.Expanding) n = self.grid.rowCount() + 1 self.grid.addItem(spacerItem, n, 1) self.grid.setRowStretch(n, 100) I want the spacerItem to be always the last Element in my Layout, so when i add a new Widget, i want to remove the spacerItem , add the new Widget and then append the ...

2012年5月29日 · 2) Use a QSpacerItem as a placeholder and set it's visibility to the opposite of the QWidget you want to hide but preserve it's position+size in the layout. 3) You can use a special container widget (inherit from QWidget) which gets/synchronizes it's size based on it's child/children widgets' size.

2019年5月27日 · You don't need to handle the QSpacerItem yourself (the documentation lists the methods you should use instrad of creating the QSpacerItem). If you want to add a space with a specific size, you can use QVBoxLayout::addSpacing() :

2014年5月5日 · I've added a QSpacerItem to a layout using its addStretch() method. layout->addStretch(1); now i'd like to delete it but i didn't have any reference to it. how can I browse all QLayoutItem an...

2012年8月1日 · QSpacerItem changeSize attracts bug. Ask Question Asked 12 years, 7 months ago. Modified 12 years, 7 ...