QToolTip::showText() for tree view

Ayush Gupta

I need to add the functionality that when user tries to enter some invalid value in a tree view
I need to show some tool tip to the user.

I am trying to achieve it using
QToolTip::showText() but not able to succeed.

jsulm

@Ayush-Gupta said in QToolTip::showText() for tree view:

I am trying to achieve it using
QToolTip::showText() but not able to succeed.

Well, then you should show how you're trying to use it, else we can only guess...

Ayush Gupta

I am trying below code for my tree view
QToolTip::showText(QPoint(0,0),"Test");

jsulm

@Ayush-Gupta This is clear, but where and when do you call showText()?

mrjj

@Ayush-Gupta said in QToolTip::showText() for tree view:

QToolTip::showText(QPoint(0,0),"Test");

That will show a tool tip up in top corner of the screen.

Is that the issue ?

If yes, please understand that ToolTip operates in screen coordinates so
you have to translate the rect of the cell to global coordinates for the tooltip to be place correctly.

Here is a sample for when you click on cell. you will will most likely use
another signal to trigger it.

void MainWindow::on_treeView_clicked(const QModelIndex &index)
{
    // get the rect of the cell from index
    QRect cellRect = ui->treeView->visualRect(index);
    // then use mapToGlobal to convert it to globals and show tool tip
    QToolTip::showText(ui->treeView->viewport()->mapToGlobal( cellRect.topLeft() ), "the text", this);    
}

alt text

Ayush Gupta

@mrjj said in QToolTip::showText() for tree view:

cellRect

I tried with this code but still the text is showing in wrong position i.e in upper left corner of treeview

JonB

@Ayush-Gupta
Confirm (debug out) what the cellRect.topLeft() is returning for you?

Ayush Gupta

it shows
QPoint(0,0)

mrjj

@Ayush-Gupta

I would guess you then use an invalid index.
so please check your index before use with
index.isValid()

If you ask visualRect(index); for an invalid index, you get invalid rect and hence 0,0

So that is most likely what you are seeing.

Ayush Gupta

@mrjj I tried
index.isValid() it returns true for me.

JonB

This post is deleted!

mrjj

@Ayush-Gupta

Without your actual code and details
i cannot guess why it does not work for you
since it worked well in a sample.

Ayush Gupta

I am using QSortFilterProxyModel also in my tree view with my custom model?
Would it be a cause ?

mrjj

@Ayush-Gupta

Yes it might
and would explain the index be valid but has no
VisualRect we can count on.

I did not test it.

Please see if using
proxy->mapToSource(Index);

Does return a valid cell rect.
Look the returned QRect and see if it has valid values or not.

Ayush Gupta

doing that I got
ASSERT: "!"QSortFilterProxyModel: index from wrong model passed to mapToSource

mrjj

@Ayush-Gupta

ok, please consult the docs and make sure you are using it as intended. :)
also check the index you use is valid etc.