Is there any possibility to make DockWidgetArea in QMainWindow scrollable? I have many instances of QDockWidget that cannot fit into the area without scrolling. Basically, I need to have two “side bars”, one on the left, second on the right of the main window. These side bars has to be floatable on the whole and so be able to be moved to secondary monitor.
I have tried adding three instances of QMainWindow into the horizontal layout, used the middle one for showing the main application content and the rest as a dock areas – their central widget has zero size.
It works except that I am not able to add a scrollbar into these "dock areas". More precisely, I can add a QScrollBar as a central widget of these QMainWindows, but it breaks docking ability and that is all.
In Qt 4 there was QDockArea widget, but in Qt 5 one has only a minimal control of the dock areas behavior.
Is there any solution for that?
Related
I have a program, preliminary look of which is in the first photo. Here, the project tree takes all space below it, and the 3D-viewport and the text edit widget are stacked vertically:
However, when I try to turn that text edit into a dock widget, it places itself under the project tree as well:
I would like the layout to be as in the first photo, and the text edit to be a dock widget at the same time, but I couldn't figure, how to do this, at least in the Qt Designer. Is it possible?
Thanks)
I think QMainWindow::setCorner is what you're looking for...
QMainWindow main_window(...);
main_window.setCorner(Qt::BottomLeftCorner, Qt::LeftDockWidgetArea);
The above code should cause the bottom left corner of the QMainWindow to be occupied by the left dock area rather than the bottom dock area.
I want to allow a user using my application to be able to drag a boundary between two widgets in my window which will resize the two (i.e. you drag it down and the top one will get bigger while the bottom gets smaller, and vice-versa).
Is there anything in Qt designer that will allow a user to resize an element in the window, within certain constraints?
Thank you
What you're describing is called a QSplitter widget. In Qt Designer, you can create one by selecting 2 or more widgets, and then clicking the splitter button on the toolbar at the top. It's in the same location as the layout buttons. It will place those widgets inside a QSplitter. You still need to place the splitter widget inside another layout. It will create a handle between them to let you resize the portion that each widget gets.
You're looking for the QDockWidget. It can do all that you described above and more. The user can dock the widget to different sides of the window, changing which widget is on the top or bottom. You can customize the minimum and maximum sizes, as well as default sizes.
I use grid layout (horizontal and vertical too). I like the fact that when resizing the window fills the entire window contents. but this extension is poorly managed. I often want to change the size of only one column in grid layout without changing the size of the window. such as in Windows Explorer. there are two columns - the left list of directories and their contents to the left to the right. and i can always press mouse button therebetween and pulling change the mutual sizes of columns in relation to each other.
how can I do this in Qt?
You need to use a QSplitter rather than a QGridLayout in this specific case (where you just want 2 widgets shown together). QSplitters are draggable.
You are looking for QSplitter
(The following is the procedure in the Qt Designer)
Group your widgets, and click Lay Out Horizontally/Vertically in Splitter
Put this group into another layout (QGridLayout, for example) to automatically expand it.
Congrats! Your Layout is now draggable(from step1) and expandable(from step2).
In my Qt program, I programmatically generate a modal QDialog. I want to show two widgets in this dialog window: A custom widget showing a camera output and a QTableWidget, showing the pixel coordinates of the corners found in the camera image. I generate a QHBoxLayout and add my custom widget and the QTableWidget into it. Then I set this QHBoxLayout as the Layout of the QDialog window. What I want to achieve is to share the available space in the QDialog's window area equally between my custom QWidget and the QTableWidget, horizontally, by using a QHBoxLayout. But I always end up with QTableWidget occupying the whole QDialog area, by overlapping my custom widget. How can I instruct these two widgets to exactly share the QDialog area?? Note that I first add my custom widget and then the QTableWidget into the QHBoxLayout.
Make sure on your custom widget you've specified a minimumSizeHint and a sizeHint, this instructs the QLayout manager that the widget requires a specific space. To have them split equally you'll be best off detecting the size of the QDialog and then specifying the width for both by removing the boundary sizes (spacing between widgets + space to QDialog edge) and dividing it up.
I am using qt designer and python. I want to make a layout where a user can drag widgets to control the size while at the same time scaling properly with the window. Basically all 3d modeling programs have this function, usually it has a top left right and perspective view. The user can drag the edges to resize each view and it will maintain that aspect ratio when the main window is resized. My question is similar to this: active resizing of widgets inside mainwindow but I would like to do it in qt designer.
So what I have found is the layout horizontal/vertical splitter. However I am only able to layout two widgets horizontally, and another two widgets horizontally, then grid layout. This makes it look similar to what I want except I want the top and bottom horizontal layouts to also be re-size able.
Thanks
Edit:
I have been able to do this with putting both horizontal split views in a group box and then splitting the two group boxes, however that makes each widget independent and does not let the user grab the middle axis to control all 4 views.
You are essentially asking for a splitter than works across two axes - no such standard widget exists. So you will have to create your own.