I want to make a QToolBar have 3 columns of buttons when docked on the left side of the QMainWindow, but have 1 row when docked on the top of the main window. Is this possible?
I have a tried using a QToolBar with a custom layout, but the normal re-size behavior of the QToolBar doesn’t work (doesn’t hide widgets behind an expand button when its too small). The non-working expand button isn’t that big of a deal, but the bigger problem is that the custom layout prevents the main window from being smaller than the toolbar.
I was able to get my desired behavior by putting each row of Tool Buttons in a QHBoxLayout, putting that layout in a empty QWidget, and calling toolBar->addWidget( widget ) for each row. This gives me a grid toolbar when the toolbar is mounted on the left, and single horizontal bar when mounted on the top.
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I have 2 QTabWidgets in a window that contain QWidgets and a additional button intended to collapse the tab content which controls visibility. Either both are visible or one is hidden.
When I set the widget visibility using the code below, the widgets disappear, but the tab widget doesn't resize.
for(int i = 0; i < tabWidget->count(); i++) {
tabWidget->widget(i)->setVisible(!hide);
}
I am left with a blank box and a frame around the edge, but nothing in the window resizes
What I would like to happen is for the tab widget that is still visible to expand to take up the whole window, but for the other tab widget's bar to still be visible.
It is possible to hide just the tab bar. Is there any way to hide the tab content and leave the bar visible?
Here are a couple of options, one of which is similar to hiding tabs in a QTabWidget.
1. Replace the tabs with dummy widgets.
You still want the tabs to show, so swap them out with an empty widget so the calculated height of the contents of the QTabWidget is 0.
2. Hide the contents of the tab's widget rather than the widget itself.
You most likely have a layout within these widgets, the layout spacing and margins will show as empty space. You would need to work out the details of hiding the contents easily.
3. Set the maximum height of the QTabWidget
Set the maximum height of the QTabWidget to the height of the QTabWidget's QTabBar.
if (hide) {
tabWidget->setMaximumHeight(tabWidget->tabBar()->height());
} else {
tabWidget->setMaximumHeight(QWIDGETSIZE_MAX); // Default maximum size for qWidgets
}
I did not see that setting QSizePolicy on either of the tab widgets had an effect. Tested on Qt 5.13.1.
I'm getting started with Qt and decided to build a full-screen text editor. I want to have a button (button with arrow in screenshot) attached to a QDockWidget which opens and closes it so the button is always visible to the right side of the screen and stay anchored to it when dock is visible or resized.
My current app is a simple fullscreen textEdit set to centeralwidget in Mainwindow.
I haven't found a way to do this yet with layouts or existing addAnchor() functions so any help or direction is appreciated.
You can achieve what you want by using a container for your text edit and the button. A QWidget instance can be used as an "invisible"*** container for other widgets.
So in Qt Designer you add a widget as a central widget of the main-window, inside this widget you add the text edit and the button, then you set a vertical layout for this container widget.
Don't forget to restrict the docking widget to only dock to the right side, you can do that with: dock->setAllowedAreas(Qt::DockWidgetArea::RightDockWidgetArea); //assuming dock is the pointer to your QDockWidget.
In case you want the dockWidget to be able to dock to any side and the button to follow, you can do that too, but it get a little bit more complicated. Basically you need to connect a slot to dockLocationChanged of your dockWidget and based on where it's docked you need to set-up a new layout for the container widget to be vertical or horizontal and the order of the textEdit and the button based on the side the dock happened.
LE:*** you will most likely need to set the margins you want, since both the widget and it's layout can have them and the actual content might have higher spacing than you want.
I have QWidget, used Lay Out in a Grid, then a QLabel, but there are some spaces between the QWidget and QLabel. How can I make them the same size and not break the layout?
I'm using this from UI editor.
When you select the widget, in the UI editor's property pane you should see the options for the layout that belongs to it (the options have a red background, and they're usually at the bottom of the list). Amongst the options are ones for setting the margin in pixels between widgets in the layout, if you set it to 0 it should solve your problem.
I'm trying to get a widget placed on a page in a QStackedWidget to resize automatically when the parent QStackedWidget resizes. This simple task seems impossible to do with Qt Creator. Adding a layout to the page does not seem to do anything, the layout just stays at whatever size it's designed as, and will not resize. This is (I think?) because the layout is being added into the page widget as a child and not directly attached to the page widget. There seems to be no way to actually add a layout to page.
How do a get a widget to resize in a QStackedWidget with Qt Creator???
As a side comment, I really wish Qt would abandon it's layout system, it is far far harder to use then an anchoring based system.
Qt Creator treats widgets as if they already have a layout on them which you can access from the context menu (right-click) of the widget in the designer or from the widget list at the right. This means that you only have to drop layouts (from the palette) on a widget if you want to divide that top level layout into further sub layouts. The image below shows this context menu.
Notice the widget icons on the right that show a crossed-out red circle. This indicates that no top-level layout has been defined for those widgets. Once a layout type has been chosen, the red circle will disappear and the icon will reflect your layout choice.
In your case, after you drop a QStackedWidget on your main widget, you can right-click the main widget, select "Lay out" and choose "Lay Out Horizontally". This will make the stacked widget fill the entire main widget and resize with it.
Likewise, if you drop any widgets on one of the "page" widgets, you can then right-click the page widget and assign a top level layout for that which will cause those widgets to resize accordingly with the page widget.
I am new to QT and I am creating a widget that has a gridlayout. The gridlayout contains a matrix of QLineEdit widgets. The window resizes to fit the layout but when layout is large it goes off screen. When I maximize the screen, the QLineEdit widgets are resized to fit the screen and for large layouts they become extremely small.
I want to be able to resize the window without resizing the QLineEdit widgets and add scroll bars to navigate.
I tried the following with no luck:
Window->resize(QSize(500,500));
QScrollArea *scrollArea = new QScrollArea;
scrollArea->setWidget(Window);
where window is the widget containing the layout. Also, the window closes when after executing "scrollArea->setWidget(Window);" and I dont why.
If someone can help me out I would really appreciate it.
Thank You!
For disabling the vertical resize on the widgets, why don't you just use the setFixedHeight() method on the widgets?
For the menu bar, why don't you take it out of the widget that is scrollable. You can have a layout for the window that contains the menu bar and then the widget that contains everything else (scrollable part). Is that what you are looking for?
I fixed my problem by creating a QMainWindow with the menu bar. Then created a widget which includes the layout, set the Scroll Area to the widget. Finally set the central widget of the main widow to the scroll area.