How to remove the space between widgets while applying layout.
in the QT if i apply any layout to widget like, QBoxLayout or QGridlayout that time automatically taking space between Widgets. i need to remove the space.
How to remove the space?
look for QLayout::setSpacing() function
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I have a small program which contains a QGroupBox with other widgets like this:
I tried many ways to manage the size of the QGroupBox to make the height as the same as the rest of the parts. Except for the way of using setMaximumHeight, because I want the size to change dynamically with the window size too. what else can I do to manage the layout?
Right now there are three items in a layout. The layout will try to fill the available space. QLineEdit and QSpinBox (or whatever your second widget is) have SizePolicy.vertical == fixed, so all extra space goes to the QGroupBox.
You have these choices:
Add a vertical spacer as fourth item below the groupbox to your layout.
Set maximum height of your groupbox - then the remaining space will be evenly spaced between the items.
Adjust the size of your window / widget / dialog (in Qt Designer or via code).
I have a QDialog window like this and I want to delete the space between 'Length', 'n', 'm' and corresponding QLineEdit input boxes. How can I achieve that ?
If you use gridlayout, I am not sure why your output looks like that. Generally Qt will not leave huge empty space like that, There are three possibility I can think of:
You have many SPACE after Length:, M: or N:
The layoutHorizontalSpacing is too large in your grid manager.
The layoutColumnStretch was set to in favor of label in your grid manager, should be "0,0", not "1,0". I mean, stretch of Label should not be higher than lineedit.
Still, I would use a simple form layout in your application.
All you need to do is reset the alignment of the labels:
label.setAlignment(QtCore.Qt.AlignRight | QtCore.Qt.AlighVCenter)
This can also be done in via the Property Editor in Qt Designer.
You have to decide what to do with the space you want to remove :
Reduce the whole widget : it depends on the surrounding layout, adding an horizontal layout on right or left of it will put the space out of your widget.
Space on the left of your labels : you can align the label text to the right as ekhumoro suggested, or directly reduce and align to the right the whole frame by adding an horizontal spacer on its left (in the surrounding layout).
Space on the right of your line-edits : like above you can add horizontal spacers or reduce and align the frame.
Expand the line-edits : remove their fixed width (default horizontal policy is expanding) or set a bigger one.
The point is : the space has to be somewhere except if you reduce the parent widget or enlarge some the inner widgets. Size-policy is useful to tell which widget should take the available space, spacers are useful to let empty space between widgets.
I am having some trouble making a new QT widget fill all the available space.
I want to add a widget (a QGLWidget) to the verticle layout (mVisual) and have the layout resize so that mVisual occupies the maximal amount of area.
My layout looks as follows:
The code I have is
ui.setupUi(this);
mWidget = new glStream();
//mWidget->setMinimumHeight(480);
//mWidget->setMinimumWidth(480);
ui.mVisual->addWidget(mWidget);
The problem is that if I don't manually set the width or height I can't even see my widget when I add it!
The only thing I can think of is to perform some sort or arithmetic like parentSize-lytControlsSize, but this feels dirty and like MFC.
How can I layout my widgets so that one layout (mVisual) is minimal, while the other is maximal?
if you put your widget in a Layout, widget fill all available space in their parent area, and if you want to fill without margins, set Layout margins to 0.
So I have a dialog that consists of one QGridLayout that has two columns of widgets (labels and comboboxes). Depending on the selections of the comboboxes some rows might be hidden.
I figured out that having the dialog call self.layout().setSizeConstraint(QLayout.SetFixedSize) as it shows/hides the comboboxes would make the dialog change size accordingly.
But then I realized that the layout was still showing the vertical spacing of empty rows, thus making the dialog show too much space here and there.
How can I get rid of this? Is there a way to have the layout resize to show only vertical spacing of rows that have visible widgets?
I think I found the solution. Using QVBoxLayout instead of QGridLayout somehow makes widgets and their vertical spacing go away when a widget is hidden.
You might need to use QLayout::takeAt ( int index ) to take out the item, once the visibility is set to false & use QLayout::addItem ( QLayoutItem * item ) when you need it back in your layout.
Keep in mind that if an item is removed, other items will be renumbered. So you have to plan what you do accordingly. Refer the documentation .
do anybody know how to create a stretchable separator between two Widgets in a QBoyLayout?
So that the user can easily change the stretch factor for the cols/rows.
Something like that you can see in the picture:
thanks.
I think a QSplitter would fit best for your need. You can click and drag it to adjust how much space each widget gets.
What you are looking for is a Splitter Layout:
Another common way to manage the layout of objects on a form is to
place them in a splitter. These splitters arrange the objects
horizontally or vertically in the same way as normal layouts, but also
allow the user to adjust the amount of space allocated to each object.