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How to check if a row is selected in a table (QT4)

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vgkanis

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Monday, March 19th 2007, 10:30pm

How to check if a row is selected in a table (QT4)

Firstly,

Does anybody know the difference between QTableView and QTableWidget. They say that QTableView is closer to the QTable class of Qt3, but I think that QTableWidget is closer, and this is the one that I am using.

Now, back to my question....

I want to let the user modify the number of rows that a table has, by adding or deleting rows. The first task is straight forward, but how do you do the second one. I tried to use the itemClicked SIGNAL but that did not work. I need to find a way to check which items, and consequently which row(s) are selected.

Thank you for your help,
Vasilis

This post has been edited 1 times, last edit by "vgkanis" (Mar 20th 2007, 2:00pm)

Manivannan_1984

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Tuesday, March 20th 2007, 6:51am

RE: How to check if a row is selected in a table (QT4)

Try this signal... it will alow you to keep tracking of current item

Quoted

void currentChanged ( int index )
[PHP]

Quoted

U can make anything, but nothing can make U.

vgkanis

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Tuesday, March 20th 2007, 2:24pm

RE: How to check if a row is selected in a table (QT4)

Quoted

Originally posted by Manivannan_1984
Try this signal... it will alow you to keep tracking of current item

Quoted

void currentChanged ( int index )


I used the

Source code

 
1

currentRow()


function, and it works. Of course this function works only if you do not alter the selectionMode. I had set it to SingleSelection and it did not work.

vgkanis

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Monday, March 26th 2007, 11:42pm

RE: How to check if a row is selected in a table (QT4)

The currentRow function has one flaw: You need to actually select the row. If you simple click on a cell, the row is not selected.
Therefore, I am back to my initial problem; How do I know which row is selected?

I know that there is the cellPressed signal, which does a pretty good job. But, it does not work when the table's cells consist of widgets, and this is my case.

vgkanis

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Wednesday, March 28th 2007, 7:34pm

RE: How to check if a row is selected in a table (QT4)

With the following code

Source code

 
1

int rows=QTableWidget->currentIndex().row()


I do get the selected row. But, because I am using widgets, I need to manually select the row. The row is not selected if I click on a cell, no matter what the setSelectionBehavior and setSelectionMode are set to.

Is this a bug in QTableWidget?

SABROG

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Wednesday, March 28th 2007, 7:55pm

I set

Source code

 
1

Table->setSelectionBehavior(QAbstractItemView::SelectRows);


and i still can edit any cells with dbl click and keyboard, but selected cell don't see

vgkanis

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Wednesday, March 28th 2007, 8:06pm

Try

Source code

 
1

Table->setSelectionMode(QAbstractItemView::SingleSelection )

SABROG

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Wednesday, March 28th 2007, 8:17pm

If this ?

Source code

 
1

int row = Table->row(Table->currentItem());


or this

Source code

 
1

int row = Table->currentItem()->row();

This post has been edited 1 times, last edit by "SABROG" (Mar 28th 2007, 8:20pm)

vgkanis

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Wednesday, March 28th 2007, 8:21pm

I think it will work.

But, my problem is that the row is not selected when I click on a cell. In other words, the row is selected only if I clicked on the column header.

This post has been edited 1 times, last edit by "vgkanis" (Mar 28th 2007, 8:22pm)

SABROG

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Wednesday, March 28th 2007, 8:23pm

For this you must use:

Source code

 
1

Table->setSelectionBehavior(QAbstractItemView::SelectRows);


But you can't see what cell you select, but can edit any cell.

vgkanis

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Wednesday, March 28th 2007, 8:29pm

Correct,
But at the same time, the row is not selected.