how to synchronize 2 view's (Table & tree) scrolls.

[anda_skoa]

Do the two scrollbars have the same range?

If not, you might need to calculate the relative position and apply this to the other's range.

Cheers,
_

[prasad_N]

Do the two scrollbars have the same range?_

No, they are different. that is the reason I am just trying to adjust the header range to actual views range in below way, Now this range is getting changed but the behavior is same.

connect(m_header->horizontalScrollBar(), SIGNAL(rangeChanged(int,int)), this, SLOT(rangeChanged(int,int)));
void treeView::rangeChanged(int min, int max)
{
    //Eevn If I don't do this also, I could see same behavior 
    QScrollBar* s2 = horizontalScrollBar();
    m_header->horizontalScrollBar()->setRange(s2->minimum(), s2->maximum());
 
    qDebug() << "min = " << min << " max = " << max;
}

connect(m_header->horizontalScrollBar(), SIGNAL(rangeChanged(int,int)), this, SLOT(rangeChanged(int,int)));
void treeView::rangeChanged(int min, int max)
{
    //Eevn If I don't do this also, I could see same behavior 
    QScrollBar* s2 = horizontalScrollBar();
    m_header->horizontalScrollBar()->setRange(s2->minimum(), s2->maximum());
 
    qDebug() << "min = " << min << " max = " << max;
}

To copy to clipboard, switch view to plain text mode 

If not, you might need to calculate the relative position and apply this to the other's range._

could you elaborate this little more.

[anda_skoa]

could you elaborate this little more.

Let say one range is 0-100 and the other is 0-200, then a value of 20 in range 1 would be 40 in range 2

Something like

int range1 = r1Max - r1Min;
int value1 = value - r1Min;
double relValue = value1/double(range1);
 
int range2 = r2Max - r2Min;
int value2 = range2 * relValue;
value = value2 + r2Min;

int range1 = r1Max - r1Min;
int value1 = value - r1Min;
double relValue = value1/double(range1);

int range2 = r2Max - r2Min;
int value2 = range2 * relValue;
value = value2 + r2Min;

To copy to clipboard, switch view to plain text mode 

Cheers,
_

[prasad_N]

This is some how change the behavior But not exactly the way I wanted. Because of the (int/double) header is moving step by step instead in-sync with actual view.
Actual view is moving smoothly but header is moving step by step, this looks so odd to user, Even If I change both the header ranges to 0 to 100 I could see same behavior.

I am attaching more code here, Please have a look. simpletreemodel.zip
Qt5.4.0 & Compiled on Windows7.

[prasad_N]

Any help..?? Still struggling with this issue..!

[prasad_N]

Using Table view/Table widget with QTreeview and trying to sync is not working as expected, But after bit experiments using two tree views is working as expect (being both the ranges are same its working as expected. so suggesting to use same view in case you need sync).