In my QT application I use a QTabWidget for the base navigation. This QTabWidget I setup in the ui. In some of the tabs of the QTabWidget I need to have QStackedWidget to be able to "drill down in the view".
I tried adding the QStackedWidget inside the ui also but it automatically adds a page to the stack. I want to add the pages for the QStackedWidget in code instead. If I in the code try to do this the stackedWidget already have a standard page so myWidget will be the second in the stack.
MyWidget *myWidget = new MyWidget(ui.stackedWidget);
ui.stackedWidget->addWidget(myWidget);
What is the best and easiest way to setup a QStackedWidget inside QTabWidget tab?
How about:
QTabWidget *myTabWidget = new QTabWidget(this);
QStackedWidget *myStackedWidget = new QStackedWidget(myTabWidget);
myTabWidget->addTab(myStackedWidget, "Stacked Widget");
Also you can remove all existing stack pages in Qt's Designer/Creator. Just right-click on the stacked widget and remove all existing pages. Then you can add the needed pages in the code using addWidget().
I'd say - create it in ui, just like you do (this way it's easier to layout/position, add other widgets on the tab later, etc), but simply remove all existing pages (added by designer) from code and add your new ones.
Actually Designer from Qt 4.6 allows to delete all pages from stacked widget - you need to right click, go to submenu "Page X of Y", and choose Delete. Repeat until all pages are gone :)
Maybe this got added to the Designer just recently, so you may still need to remove them from the code if you have an earlier version of Qt.
Speaking of keeping stuff inside ui against keeping it in code i'd vote for "as much in UI-file as possible" :)
Related
I am new to Qt Designer so this question may be stupid but I'm really stucked.
I'm creating an app using Qt Designer and PyQt5. My app contains a few screens and I want to switch between them by clicking the button.
The first screen consists of a button (button_1) and a label (label_1) placed in a vertical layout. The second screen also consist of a button (button_2) and a label (label_2), but these are different widgets with different size and content. And I want to place button_2 and label_2 in a horizontal layout.
Previously I didn't use layouts. I just created one .ui file and put button_2 and label_2 above button_1 and label_1. They were overlapping but it didn't affect the performance because I made the button_2 and label_2 invisible when button_1 and label_1 are shown and vice versa. But now I need to make the window resizable, and I need to put the widgets in a layout.
The first thought was to create two separate .ui files and set them using loadUi command when it comes to switching between screens. But I need to use just one .ui file. Is this possible? How can I create two independent layouts? Or maybe there is another way to solve my proble. Any help is very much appreciated.
I think that in this case your best option is to use a QStackedWidget as a container for your labels and buttons. To create a stacked widget in Qt Designer you can drag a Stacked Widget from the container group on the left to the parent widget. This will create a stack with two pages. Each page can then be set up independently. Whatever layout you and widgets you add to a particular page will only be visible when that page is shown. You can add additional pages if you like by right-clicking on the stacked widget and selecting Insert Page from the context menu.
To navigate between the pages in Qt Designer you can choose the correct widget in the tree in the Object Inspector, use the two black arrows in the top-right corner of the stacked widget, or use the context menu of the stacked widget. To navigate between the pages in your python script you would need to use QStackedWidget.setCurrentIndex().
I want to know how to create a QLabel in QtCreator Design mode that is hidden by default?In the properties list in the right hand side panel , there's not any option regarding visibility and also adding label->hide() to setupUi function (after compiling ui file and adding to the project headers) makes no difference.
Designer doesn't expose the visible property. You could hand-edit the UI file, but that will be overwritten next time you edit in Designer. It's best to leave it visible in Designer, and just write a line of code after you call setupUi() to hide the widget you don't want to be initially shown.
I'm using Qt Creator 4.5.0 and am trying to create a QDockWidget that I could modify in the builtin designer (I do this all the time with QDialogs and QMainWindows, so this is the first time trying with a QDockWidget). But I'm having no luck with being able to add any widget elements of any kind to the QDockWidget.
Here are the steps I've taken
In the Projects tree on the left, right click on the project and select "Add New..."
In the window that pops up select "Qt" on the left side, then select "Qt Designer Form Class", then select "Choose"
On this page expand the section for "Widgets", then select "QDockWidget", then select "Next"
On this page give the class a name (for me it's "ImageFilesDockWidget"), then click "Next"
On this page select "Finish" to add the files to the project.
From here the "ImageFilesDockWidget.ui" file will automatically show up, so I tried to add some widgets to the view, but nothing would get added. For example, if I clicked and dragged a pushbutton into the center of the dockwidget, then it displayed a red circle with a line through it to indicate I couldn't add the item.
If anyone has run into this problem and knows how to make it work, then that'd be an immense help to me.
Thanks in advance.
update
Currently I'm able to use the designer to customize a standard QWidget object (call it "ImageFilesWidget.ui"). So at the moment my solution is to add a standard QDockWidget to my QMainWindow in the designer, then (still in the designer) I promote the dockWidgetContents from a standard QWidget to my ImageFilesWidget class.
It seems like the problem is when qtcreator 4.5 creates the dockwidgets ui file for you, it doesn't include the "dockWidgetContents" widget that is included in previous versions. Just manually put <widget class="QWidget" name="dockWidgetContents"/> under the "windowTitle" property of the dockwidget and you'll be able to add ui elements to it.
I started developing an application, I designed a empty QMainWindow wit just the menu bar. and created two new QWidgets and designed the features of my application on each.
Here is the thing: How do I add and interchange the last two QWidgets inside my QMainWindow?, so QMainWindow will show one set of features of my application at once.
Perhaps you are looking for QStackedWidget
(from Qt: The QStackedWidget class provides a stack of widgets where only one widget is visible at a time.)
You can find it insde the Containers group
Add a StackedWidget into your MainWindow, then
Directly edit the widget at present page by Qt designer(use the upper-right arrows to switch between differetn widgets). Notice that
in StackedWidget you have to create another signal sender, ex: a
combobox to decide which widget should be shown), or
If your custom widget contains some customized and hand-crafted
funcationalites that Qt doesn't have, you might need the widget
promotion. (otherwise, skip this)
I want to use a common control (QTreeView) in two different tab pages in QTabWidget.
how to do this ?
I added a tabwidget and controls in tab pages in Qt designer.
using qt creator version 2.4.1 in Win 7.
You can't have the same QTreeView in two different QTabWidget pages. When you add any widget to a layout, that layout takes ownership of the widget. Since there can only be one owner, you're stuck with one parent per widget.
But you can fake it. Give your main page a grid layout. Put a QTabBar running along the top, your QTreeView on the left (or wherever), and a QStackedLayout on the right. Connect the tab bar and the stacked layout so changing tabs in the bar changes the visible page in the stack layout.
That should be just what you're looking for - just be prepared to fight with QTabBar to get it to display like you want it to...
Alternatively, just live with having two separate tree views - they'll both be viewing the same model, after all, so the bulk of the data won't be duplicated. Saves you a fight with QTabBar, too.
Hope that helps!