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I using the navigation drawer with the new component NavController, I have seven fragments each fragment represent navition drawer menu item

I need to access some view components in each fragment like Recyclerview and Adapter from MainActivity to use it on onOptionsItemSelected like this

I'm having trouble with the layout of the following program. I want to insert a QHBoxLayout into the first row (or any row for that matter) of a QVBoxLayout. Goal is to achieve something like this:

Here is what I have so far:

everyone, I am working on a project that retrieves data from firestore and some of that contains URL for an image. when I start the app I notice a delay when loading the image. so I thought about what I've seen in the Facebook app that when loading an image showing a view with some animation to inform the user that the app still loading in the background, any help, please.

this is how I retrieve the data

I'm new to Qt framework. In new application I want to create list with customised items. These items are quite simple and must contain title label, thumbnail and description label (picture here)

For now I don't want to play with custom drawing and all that stuff becuase I think it's easier to do items I want with proper widget/layout so I decided to use QListwidget and subclassed QAbstractItemModel (KeyframeModel) and QListWidgetItem (TileWidgetItem).

After some coding it looks how I wanted but strange thing happens to QListWidget (grid mode) when I add some items. In my case a QListWidget is resizable (due to how it's embedded inside main layout) and number of columns should be dependent on list and items width. Items are fixed size (at least for now). But when I resize the list one of the items at some list's width is misaligned and not I don't know what's going on. Below are te screenshots from app:

Pic. 1 List initial state (right after start)

Pic. 2 List after resizing #1

Pic. 3 List after resizing #2

Resizing #2 is a few pixels wider than resizing #1 and resizing #1 is hard to get (border case) - few pixels width less and I've got 2 columns (it's okay) but some pixels more and I end up with case #2. In all cases number of columns is okay.

Sometimes also last item is misaligned after program start right-away like here (right after start like in pic. 1 but as you can see different result despite same list width). I wonder why is it so inconsistent after start-up.

Do I missing something? Do I must do some parts in different way? Or is it just some glitches in debug mode?

Below I post some code:

Application:

I have a file :

Hello I have a problem with setting the visibility of the cardView part.

I have a parent container in one of my activities which make a call to it's child containers consisting of a horizontal scrollview as one of the objects. Sort of like a recyclerview with row objects placed inside where there is a common row/item layout consisting of a horizontal scroll view.

My objective is to sync the positions of the horizontalscrollview such that, when i am scrolling horizontally on one of the objects from position 1 to position 2, all the other items containing horizontal scrollview get updated from position 1 to position 2.

Here's my main container code: (Activity code)

I have three different layouts cardsListLayout , titleLayout , cardMagazineLayoutand there may be more in the future, which used as a views on onCreateViewHolder method.

I want to switch between views in onCreateViewHolder method so when user choose from AlertDialog list

this onOptionsItemSelected in MainActivity Where there is menu Item "change the layout" so that when the user presses it it appears AlertDialog list

I have an Activity with Fragments as the main content. This Activity has a Toolbar with a TextView inside: