Hello,

any1 know how to catch "QTreeWidget Horizontal header double click event"?
this is my QtreeWidget, what i wont is when i double click on horizontal header item, Tree should check all the item in that selected column ..
any ideas ??

.H fie
Qt Code: 
  1. ifndef MAINWINDOW_H
  2. #define MAINWINDOW_H
  3.  
  4. #include <QMainWindow>
  5.  
  6. namespace Ui {
  7.     class MainWindow;
  8. }
  9.  
  10. class MainWindow : public QMainWindow
  11. {
  12.     Q_OBJECT
  13.  
  14. public:
  15.     explicit MainWindow(QWidget *parent = 0);
  16.     ~MainWindow();
  17.     void initTree();
  18.  
  19. private:
  20.     Ui::MainWindow *ui;
  21.  
  22. private slots:
  23.  
  24. };
  25.  
  26. #endif // MAINWINDOW_H
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.CPP file
Qt Code: 
  1. #include "mainwindow.h"
  2. #include "ui_mainwindow.h"
  3. #include <QTreeWidget>
  4. #include <QTreeWidgetItem>
  5. #include "MyStyle.h"
  6. #include <QMultiMap>
  7.  
  8. QTreeWidget* pTree;
  9. QList<QTreeWidgetItem*> lstWidgets;
  10. QList<QTreeWidgetItem*> lstSubItems;
  11.  
  12.  
  13. MainWindow::MainWindow(QWidget *parent) :    QMainWindow(parent),    ui(new Ui::MainWindow)
  14. {
  15.     ui->setupUi(this);
  16.     pTree = NULL;
  17.     initTree();
  18.     QSize size(540,870);
  19.     this->resize(size);
  20.     this->setMinimumSize(size);
  21.     this->setMaximumSize(size);
  22.     ui->gridLayout->addWidget(pTree);
  23. }
  24.  
  25. MainWindow::~MainWindow()
  26. {
  27.     delete ui;
  28. }
  29.  
  30. void MainWindow::initTree()
  31. {
  32.     pTree = new QTreeWidget(this);
  33.     pTree->setGeometry(10,10,520,850);
  34.     pTree->setMaximumSize(520,850);
  35.     pTree->show();
  36.  
  37.     QStringList lstheadrs;
  38.     lstheadrs.append(" \n \n \n \n \n \n ");
  39.     lstheadrs.append("1");
  40.     lstheadrs.append("2");
  41.     lstheadrs.append("3");
  42.     lstheadrs.append("4");
  43.     lstheadrs.append("5");
  44.     lstheadrs.append("6");
  45.     lstheadrs.append("7");
  46.     lstheadrs.append("8");
  47.     lstheadrs.append("9");
  48.     lstheadrs.append("10");
  49.     lstheadrs.append("11");
  50.     lstheadrs.append("12");
  51.     pTree->setHeaderLabels(lstheadrs);
  52.     //------SET COLUMN WIDTH---------------
  53.     pTree->setColumnWidth(0,190);
  54.     for(int i = 1; i<=12; i++)
  55.     {
  56.         pTree->setColumnWidth(i,25);
  57.     }
  58.     MyStyle *headerStyl = new MyStyle(this->style());
  59.     pTree->setStyle(headerStyl);
  60.  
  61.     //==========================================================================================================//
  62.     QTreeWidgetItem *Node1 =  new QTreeWidgetItem(pTree, QStringList(QObject::tr("1")));
  63.     Node1->addChild(new QTreeWidgetItem(QStringList(QObject::tr("1.1"))));
  64.     Node1->addChild(new QTreeWidgetItem(QStringList(QObject::tr("1.2"))));
  65.     Node1->addChild(new QTreeWidgetItem(QStringList(QObject::tr("1.3"))));
  66.     pTree->expandItem(Node1);
  67.     for(int iChild=0; iChild<Node1->childCount() ; iChild++)
  68.         for(int i=1; i<lstheadrs.length(); i++)
  69.             Node1->child(iChild)->setCheckState(i,Qt::Unchecked);
  70.  
  71.     lstWidgets.append(Node1);
  72.      //==========================================================================================================//
  73.     QTreeWidgetItem *Node2 =  new QTreeWidgetItem(pTree, QStringList(QObject::tr("2")));
  74.     Node2->addChild(new QTreeWidgetItem(QStringList(QObject::tr("2.1"))));
  75.     Node2->addChild(new QTreeWidgetItem(QStringList(QObject::tr("2.2"))));
  76.     Node2->addChild(new QTreeWidgetItem(QStringList(QObject::tr("2.3"))));
  77.     Node2->addChild(new QTreeWidgetItem(QStringList(QObject::tr("2.4"))));
  78.     Node2->addChild(new QTreeWidgetItem(QStringList(QObject::tr("2.5"))));
  79.     Node2->addChild(new QTreeWidgetItem(QStringList(QObject::tr("2.6"))));
  80.     Node2->addChild(new QTreeWidgetItem(QStringList(QObject::tr("2.7"))));
  81.     Node2->addChild(new QTreeWidgetItem(QStringList(QObject::tr("2.8"))));
  82.     Node2->addChild(new QTreeWidgetItem(QStringList(QObject::tr("2.9"))));
  83.     Node2->addChild(new QTreeWidgetItem(QStringList(QObject::tr("2.10"))));
  84.     pTree->expandItem(Node2);
  85.     for(int iChild=0; iChild<Node2->childCount() ; iChild++)
  86.         for(int i=1; i<lstheadrs.length(); i++)
  87.             Node2->child(iChild)->setCheckState(i,Qt::Unchecked);
  88.  
  89.      lstWidgets.append(Node2);
  90.      //==========================================================================================================//
  91.     QTreeWidgetItem *Node3 = new QTreeWidgetItem(pTree,QStringList(QObject::tr("3")));
  92.  
  93.     QTreeWidgetItem *node3sub1 = new QTreeWidgetItem(Node3, QStringList(QObject::tr("3.1")));
  94.     node3sub1->addChild(new QTreeWidgetItem(QStringList(QObject::tr("3.1.1"))));
  95.     node3sub1->addChild(new QTreeWidgetItem(QStringList(QObject::tr("3.1.2"))));
  96.     node3sub1->addChild(new QTreeWidgetItem(QStringList(QObject::tr("3.1.3"))));
  97.     Node3->addChild(node3sub1);
  98.     for(int iChild=0; iChild<node3sub1->childCount(); iChild++)
  99.         for(int i=1; i<lstheadrs.length(); i++)
  100.             node3sub1->child(iChild)->setCheckState(i,Qt::Unchecked);
  101.  
  102.     QTreeWidgetItem *node3sub2 = new QTreeWidgetItem(Node3, QStringList(QObject::tr("3.2")));
  103.     node3sub2->addChild(new QTreeWidgetItem(QStringList(QObject::tr("3.2.1"))));
  104.     node3sub2->addChild(new QTreeWidgetItem(QStringList(QObject::tr("3.2.2"))));
  105.     node3sub2->addChild(new QTreeWidgetItem(QStringList(QObject::tr("3.2.3"))));
  106.     Node3->addChild(node3sub2);
  107.     for(int iChild=0; iChild<node3sub2->childCount(); ++iChild)
  108.         for(int i=1; i<lstheadrs.length(); i++)
  109.             node3sub2->child(iChild)->setCheckState(i,Qt::Unchecked);
  110.  
  111.     QTreeWidgetItem *node3sub3 = new QTreeWidgetItem(Node3, QStringList(QObject::tr("3.3")));
  112.     node3sub3->addChild(new QTreeWidgetItem(QStringList(QObject::tr("3.3.1"))));
  113.     node3sub3->addChild(new QTreeWidgetItem(QStringList(QObject::tr("3.3.2"))));
  114.     node3sub3->addChild(new QTreeWidgetItem(QStringList(QObject::tr("3.3.3"))));
  115.     Node3->addChild(node3sub3);
  116.     for(int iChild=0; iChild<node3sub3->childCount(); iChild++)
  117.         for(int i=1; i<lstheadrs.length(); i++)
  118.             node3sub3->child(iChild)->setCheckState(i,Qt::Unchecked);
  119.  
  120.  
  121.     Node3->addChild(new QTreeWidgetItem(QStringList(QObject::tr("3.4"))));
  122.     Node3->addChild(new QTreeWidgetItem(QStringList(QObject::tr("3.5"))));
  123.     Node3->addChild(new QTreeWidgetItem(QStringList(QObject::tr("3.6"))));
  124.     Node3->addChild(new QTreeWidgetItem(QStringList(QObject::tr("3.7"))));
  125.     Node3->addChild(new QTreeWidgetItem(QStringList(QObject::tr("3.8"))));
  126.     Node3->addChild(new QTreeWidgetItem(QStringList(QObject::tr("3.9"))));
  127.     Node3->addChild(new QTreeWidgetItem(QStringList(QObject::tr("3.10"))));
  128.  
  129.     pTree->expandItem(Node3);
  130.     for(int iChild=0; iChild<Node3->childCount() ; iChild++)
  131.         for(int i=1; i<lstheadrs.length(); i++)
  132.             Node3->child(iChild)->setCheckState(i,Qt::Unchecked);
  133.  
  134.     lstWidgets.append(Node3);
  135.     lstWidgets.append(node3sub1);
  136.     lstWidgets.append(node3sub2);
  137.     lstWidgets.append(node3sub3);
  138.      //==========================================================================================================//
  139.     QTreeWidgetItem *node4 = new QTreeWidgetItem(pTree, QStringList(QObject::tr("4")));
  140.     node4->addChild(new QTreeWidgetItem(QStringList(QObject::tr("4.1"))));
  141.     node4->addChild(new QTreeWidgetItem(QStringList(QObject::tr("4.2"))));
  142.     pTree->expandItem(node4);
  143.     for(int iChild=0; iChild<node4->childCount() ; iChild++)
  144.         for(int i=1; i<lstheadrs.length(); i++)
  145.             node4->child(iChild)->setCheckState(i,Qt::Unchecked);
  146.  
  147.     lstWidgets.append(node4);
  148.      //==========================================================================================================//
  149.     QTreeWidgetItem *node5 = new QTreeWidgetItem(pTree, QStringList(QObject::tr("5")));
  150.     node5->addChild(new QTreeWidgetItem(QStringList(QObject::tr("5.1"))));
  151.     node5->addChild(new QTreeWidgetItem(QStringList(QObject::tr("5.2"))));
  152.     node5->addChild(new QTreeWidgetItem(QStringList(QObject::tr("5.3"))));
  153.     node5->addChild(new QTreeWidgetItem(QStringList(QObject::tr("5.4"))));
  154.     pTree->expandItem(node5);
  155.     for(int iChild=0; iChild<node5->childCount() ; iChild++)
  156.         for(int i=1; i<lstheadrs.length(); i++)
  157.             node5->child(iChild)->setCheckState(i,Qt::Unchecked);
  158.  
  159.     lstWidgets.append(node5);
  160. }
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