Model View customized requirement

Vinoth Rajendran4

Hi All,

Initial project requirement was as below,

Hence I used GridView to implement this.

But now the requirement is changed, the expectation is

But its expected we follow the index such as
p1 = 0'th index,
p2 = 1st index,
p3 = 2nd index,
p4 = 3rd index,
p5 = 4th index,
p6 = 5th index,
p7 = 6th index.

The model data comes from C++ backend. currently backend is implemented by sub classing QAbstractListModel.

Please let me know, how to approach this problem.

Thanks!

fcarney

Just put empty data in the blank ones.

Vinoth Rajendran4

@fcarney : But those empty data also have index. I don't want index to be associated with empty data.

Vinoth Rajendran4

If not possible with GridView, is there any other model view using which this can be achieved ?

GrecKo

Will you always have only 7 items? Should it only be the layout you displayed or the empty cells can shift?

JonB

@Vinoth-Rajendran4 said in Model View customized requirement:

But those empty data also have index. I don't want index to be associated with empty data.

So what exactly do you want then?

Anyway, ISTM you have two choices:

Subclass/derive from some QLayout (e.g. possibly QGridlayout) and implement your desired layout with "blank" cells.
Interpose a QAbstractProxyModel-derived class (QIdentityProxyModel should be a good starting point) and have that deal with the indexes so that it returns "invalid index" where you want blanks in the QGridLayout. This means that while the proxy model returns some blank indexes your underlying model does not have to have such "gaps" in it.

EDIT
Oh, I'm so sorry, I only just noticed this is GridView/QML, not widgets application. I will leave the above in, I don't know is is meshes with how to do things in QML...? Hopefully the second option is still applicable?

Vinoth Rajendran4

@GrecKo : empty cells can shift dynamically.

GrecKo

How are the cell positions determined?

A GridLayout + a Repeater could work.