I am having trouble horizontally resizing a QTableWidget within a QTabWidget.
If the QTableWidget is on its own in my MainWindow, it resizes horizontally without any problems (or limits). As soon as I place the QTableWidget inside the QTabWidget I seem to hit a maximum width for the QTablewidget. I can resize it horizontally, but only so far. I do not seem to have this limitation vertically.
My sizePolicies are set to Expanding for both directions.
Anyone have any ideas?
Thanks!
EDIT:
I took some screenshots to try and clear things up. The 'QTableWidget' that is not within the 'QTabWidget' stretches much further horizontally.
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I'm trying to follow the example at the below link to have a picture (in a qlabel) shown in a scrollable area.
https://doc.qt.io/qt-5/qtwidgets-widgets-imageviewer-example.html
I'm using Qt Designer to make the ui instead of hardcoding everything. So I have a QLabel, in a QWidget (with a grid layout assigned to it), in a QScrollArea.
From the tutorial, they state the following for the sizepolicy of the QLabel:
We set imageLabel's [QLabel] size policy to ignored, making the users able to scale the image to whatever size they want when the Fit to Window option is turned on. Otherwise, the default size policy (preferred) will make scroll bars appear when the scroll area becomes smaller than the label's minimum size hint.
Setting it to ignored fits to the window, as expected and as stated. Setting it to preferred provides scroll bars when the image is larger than the scroll area, also as expected and as stated. My issue is that when the sizepolicy is set to preferred, the resize function of the QLabel doesn't work. It always stays at the default size of the loaded image. The only way that I'm able to get the resize function to work is when I don't assign a layout/break the layout to the widget in the QScrollArea, but then no scrollbars will appear when the image is larger than the QScrollArea.
Does anyone have any ideas of how to make the resize function and scrollbars work at the same time?
Thanks in advance for any help. I'm trying to learn qt5 still and this seems like it'd be a simple thing to do, but it's slowly driving me crazy.
When I maximize my window, I want to restrict a vertical layout (and the entire row below it also) so that it has a specific size (lets say a width of 200). How can I achieve this? Below is what I get now. The buttons are stretched too far. I want them to keep a width of 200.
To stop the buttons stretching, use the following steps in Qt Designer:
click on scrollArea in the Object Inspector
click on Break Layout on the toolbar
click on scrollArea in the Object Inspector
click on Lay Out in a Grid on the toolbar
click on scrollAreaWidgetContents in the Object Inspector
scroll down to the bottom of the Property Editor
change layoutColumnStretch to 0,1
These steps should remove an empty column from the scroll-area grid-layout, and make the second column stretch to take up the available space when the window is resized.
You just need to restrict the maximum width of all widgets (in this case the buttons) within the layouts of this grid column to the expected size, else they'll just keep expanding. You may also have to fiddle the horizontal size policy; I seem to remember that buttons were a bit tricky in this regard (or was that the height?), but can't test it right now.
The layout size contraint you tried only applies to the layout's direct parent widget, if it has one, which isn't the case for the vertical layouts here.
When I resize a JavaFX window, I get the red highlighted spaces
at the bottom and right. I’ve tried a lot in the SceneBuilder to auto-maximize the “Bottom Left Control” by specifying a larger height & width alongside a “Pref Height” and “Pref Width” but nothing worked.
Of course I could register a resize listener that resizes the controls at runtime imperatively but that’s not really a nice solution. Is there a declarative way where this magic is done behind the scenes and where I have to merely set some flag to accomplish this?
I have an widget x with fixed size. Then at first I took a QScrollArea and then a QGridLayout which I set as the layout of scrollAreaWidgetContent. Then I started adding some widget x in the layout at (0,0), (0,1), (1,0), (1,1)... of grid layout. Then when I ran the program, strangely when I shrink the window vertically, the widgets overlap.
And as expected, when I increase the window size vertically, they are not overlapped anymore.
But strange thing is this problem does not occurring when I shrink window horizontally. For example,
My question is, why this is happening and more importantly, keeping in mind I want to use gridlayout, how to solve this problem?
As you said in your question:
Your widget has a fixed size, so the layout does not shrink them when there is no space left.
So the question is: what do you want to happen when you shrink the window?
If you want to shrink your widget you have to change the sizePolicy of your widgets from "Fixed" to "Preferred".
If you want to reduce the number of widgets in the layout, then you could add an event handler in the resize event and remove them
If you want to disallow the shrinking of the window, then you need to set the sizePolicy of the scrollarea to a fixed or minimumSize
I have a window containing a QScrollArea with a couple widgets in it.
Until now, I was creating the QScrollArea and its child widgets in the constructor of my window, and then I was resizing the window vertically to fit its content using resize(400, sizeHint().height()). So far, so good.
Now, I'm adding or removing widgets in the QScrollArea at runtime. What should I do, after having added or removed widgets, to make the window fits its content vertically? Should I call adjustSize()? resize(sizeHint())? Should there be a call to layout->activate() or maybe updateGeometry() first? Which size policies actually matter in this case? The ones of the window, or of the scroll area, or both? I tried to set them all to Expanding.
I'm using Qt 4.6 on Windows.
It seems that calling resize(sizeHint()) (without any other magic) after widgets were added to the scroll area actually does the trick. Somehow missed that the first time.