Can we have checkbox in Header of QTreeView along with Sorting symbol

Qt Enthusiast

Hi All
Can we have a checkbox in Header of QTreeView along with Sorting symbox . When I click on checkbox , then I should be able to perform some actions

Ni.Sumi

Hi @qtEnthusiast ,

Seems this works for you.
https://forum.qt.io/topic/12626/how-to-add-check-box-inside-qtree-widget/3

Keep tracking the the QtreeView for the whether the checkbox is checked or not. you can find here.
http://stackoverflow.com/questions/8175122/qtreeview-checkboxes

Qt Enthusiast

As I understand it for each item in QtreeWidget . I am asking on common check box for header label in QtreeView it is different . LIke we have sorting mark in QtreeView like that

Ratzz

@Qt-Enthusiast
you can reimplement QHeaderView and you can make use of QMultiComboBox like this .
http://qt-apps.org/content/show.php/QMultiComboBox?content=149416

Qt Enthusiast

I could not make out for example (As I was not able to access the example code). if some one can elaborate on how implement checkbox in header of QTreeView/ I have following code using QTreeView

#include <QApplication>
#include <QSplitter>
#include <QTreeView>
#include <QListView>
#include <QTableView>
#include <QStandardItemModel>

int main( int argc, char **argv ) {

QApplication app( argc, argv );
QTreeView *tree = new QTreeView();
QListView *list = new QListView();
QTableView *table = new QTableView();
QSplitter splitter;
splitter.addWidget( tree );
splitter.addWidget( list );
splitter.addWidget( table );
QStandardItemModel model( 5, 2 );

for( int r=0; r<5; r++ )
for( int c=0; c<2; c++) {
QStandardItem *item = new QStandardItem( QString("Row:%0, Column:%1").arg(r).arg(c) );
if( c == 0 )
for( int i=0; i<3; i++ ) {
QStandardItem *child = new QStandardItem( QString("Item %0").arg(i) );
child->setEditable( false );
item->appendRow( child );
}
model.setItem(r, c, item);
}

model.setHorizontalHeaderItem( 0, new QStandardItem( "Foo" ) );
model.setHorizontalHeaderItem( 1, new QStandardItem( "Bar-Baz" ) );
tree->setModel( &model );
list->setModel( &model );
table->setModel( &model );
list->setSelectionModel( tree->selectionModel() );
table->setSelectionModel( tree->selectionModel() );
table->setSelectionBehavior( QAbstractItemView::SelectRows );
table->setSelectionMode( QAbstractItemView::SingleSelection );
splitter.show();
return app.exec();

}

Qt Enthusiast

I tried the example here in the link

https://wiki.qt.io/Qt_project_org_faq#How_can_I_insert_a_checkbox_into_the_header_of_my_view.3F

But I could not get how to connect slot on click/unclick of the check box . Can some one quide for the that . or its there any alternative way to implement check box in the header

mrjj

@Qt-Enthusiast
Hi that sample does not use a real checkbox so there is no signal.
but you can easy make your own signal for it.

class MyHeader : public QHeaderView
{
public:
....
protected:
  void paintSection(QPainter *painter, const QRect &rect, int logicalIndex) const ....
 signals: ///
 void CheckedChanged( bool state); /// define signal
  }
  void mousePressEvent(QMouseEvent *event)
  {
..... ...... ...
  // emit ur new signal
  emit CheckedChanged( isOn );
  }