QTableWidget issues

[wysota]

When I say parent, I mean what "display object" I need to use to get tables in one area and bigger table scrolling with that area.

I think I don't understand

But, correct me if I am wrong, QScrollArea can only have one child widget. Am I wright.

Basically you're right but in the end you're wrong - QScrollArea may have a single child widget which in turn has many-many-many child widgets of its own, resulting in the scrollarea having multiple widgets displayed in it.

The whole problem seems to be (at least that's my point of view at the moment) which display object to use, so tables can be shown in it as child widgets.

I still don't understand what you mean by "display object". My answer (QWidget) still stands... It is a "display object" after all...

That means, to have autoscroll, when lower table is formed (because tables are not created at the same time, lower table needs to be created when item is selected in upper table), so the user can scroll that big display object in which are tables. So, which display object to use?

QScrollArea?

I think you should just open Qt Designer and start experimenting. Just remember you won't be able to place a scrollarea with child widgets directly on a form, so eventually you'll have to subclass and implement some of the details manually.

[Djony]

"Display object" is that big white background in which are those tables placed (look at the picture again). That's what I mean when I write "display object". If that object is QscrollArea, I can place one table in it. What to do with the lower table? And that white background should be resized when I place lower table in it. The scrollbar of that background "display object" should become longer. I hope I've explained it now

[wysota]

"Display object" is that big white background in which are those tables placed (look at the picture again). That's what I mean when I write "display object".

Oh, then that's perfectly legitimate QWidget

If that object is QscrollArea, I can place one table in it. What to do with the lower table? And that white background should be resized when I place lower table in it. The scrollbar of that background "display object" should become longer. I hope I've explained it now

You should read about layouts...

[Djony]

Now that I have solved some things, back to this problem Are you suggesting me to place two qtablewidgets on one layout, which would be an item of QScroll Area? (Asking just to clarify... ) But, will Layout resize itself automatically when tables get bigger (number of rows for tables is unpredictable)?

[wysota]

Please read about layouts before asking such questions

[Djony]

Ok, I will stop with that for now (although I don't quite get it beside reading the link you gave me). Is it possible to fill cell table with colors like they are colored on picture (multiple colors, size of colored areas in proportion to percentage...)?

P.S.
I am wondering the same thing when we are talking about display of whole application. Is it possible to do it that way? To look and behave on described manner? Sorry for asking so much questions, but I am such a newbie

[wysota]

Ok, I will stop with that for now (although I don't quite get it beside reading the link you gave me). Is it possible to fill cell table with colors like they are colored on picture (multiple colors, size of colored areas in proportion to percentage...)?

Yes. Reimplement the delegate if you want to change the looks of items in Q*{View,Widget}

P.S.
I am wondering the same thing when we are talking about display of whole application. Is it possible to do it that way? To look and behave on described manner? Sorry for asking so much questions, but I am such a newbie

Yes. QPalette and/or subclassing and reimplementing paintEvents/styles/etc. are your friends.

[Djony]

Thank you for the answer.
If I understood you right, you mean to make class which inherits qtablewidgetitem and implement a method of that class which colors the cell in adequate manner? But, the question is, how can I control the size of areas in one cell (if you look at the picture, you will notice that there are 3 areas in one cell: green, red, blue parts). The height is the height of cells, but width? Thanx for any replies!

[wysota]

If I understood you right, you mean to make class which inherits qtablewidgetitem and implement a method of that class which colors the cell in adequate manner?

No, I meant to subclass QItemDelegate or QAbstractItemDelegate and reimplement painting and/or drawBackground routines.

But, the question is, how can I control the size of areas in one cell (if you look at the picture, you will notice that there are 3 areas in one cell: green, red, blue parts). The height is the height of cells, but width?

You have to reimplement the delegate's paint or drawDisplay() methods and draw the rectangles yourself.

[Djony]

How can I get positions and dimensions of these rectangles? They are inside table cells.

[wysota]

You get the width of the whole cell rectangle. You can then calculate lengths of each of the bars knowing the percentage to be displayed.

[Djony]

Thanx for reply, but I don't get it completely. I am looking at some examples in Qt Assistant and I can't catch when are those methods from QItemDelegate's class child called. Where is in my case, drawDisplay() method called?