QTreeWidget with Buttons and other widgets

main.cpp

#include "treewidgetbutton.h"
#include <QApplication>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    TreeWidgetButton w;
    w.show();

    return a.exec();
}

treewidgetbutton.cpp

#include "treewidgetbutton.h"
#include "ui_treewidgetbutton.h"
#include <QPushButton>
#include <QTreeWidgetItem>
#include <QDebug>
#include <QList>
#include <QLabel>

TreeWidgetButton::TreeWidgetButton(QWidget *parent) :
    QDialog(parent),
    ui(new Ui::TreeWidgetButton)
{
    ui->setupUi(this);


    // Push buttons to be added
    QPushButton *topLevelButton = new QPushButton("Top Level Button");
    QPushButton *childButton1 = new QPushButton("Child Button 1");
    QPushButton *childButton = new QPushButton("Child Button 0");
    QPushButton *nestedChildButton = new QPushButton("Nested Child");

//    // Connecting the button signals with corresponding slots
    connect(childButton1, SIGNAL(clicked(bool)), this, SLOT(onchildButton1Clicked(bool)));
    connect(topLevelButton, SIGNAL(clicked(bool)), this, SLOT(onTopLevelButtonClicked(bool)));


    QTreeWidgetItem *topLevelItem = new QTreeWidgetItem();
    QTreeWidgetItem *childItem1 = new QTreeWidgetItem();
    QTreeWidgetItem *childItem = new QTreeWidgetItem();
    QTreeWidgetItem *nestedChildItem = new QTreeWidgetItem();

    ui->treeWidget->addTopLevelItem(topLevelItem);

    // Adding children to the topLevelItem
    topLevelItem->addChild(childItem);
    topLevelItem->addChild(childItem1);

    // Adding a child node to a child [Nested Child]
    childItem->addChild(nestedChildItem);

    ui->treeWidget->setItemWidget(topLevelItem, 0, topLevelButton);
    ui->treeWidget->setItemWidget(childItem, 0, childButton);
    ui->treeWidget->setItemWidget(childItem1, 0, childButton1);
    ui->treeWidget->setItemWidget(nestedChildItem, 0, nestedChildButton);

}

void TreeWidgetButton::onTopLevelButtonClicked(bool clicked)
{
    ui->label->setText("Top Level Button was Clicked");
}

void TreeWidgetButton::onchildButton1Clicked(bool clicked)
{
    ui->label->setText("Child Button 1 was Clicked");
}

TreeWidgetButton::~TreeWidgetButton()
{
    delete ui;
}

treewidgetbutton.h

#ifndef TREEWIDGETBUTTON_H
#define TREEWIDGETBUTTON_H

#include <QDialog>

namespace Ui {
class TreeWidgetButton;
}

class TreeWidgetButton : public QDialog
{
    Q_OBJECT

public:
    explicit TreeWidgetButton(QWidget *parent = 0);
    ~TreeWidgetButton();

protected slots:
    void onTopLevelButtonClicked(bool clicked);
    void onchildButton1Clicked(bool clicked);

private:
    Ui::TreeWidgetButton *ui;
};

#endif // TREEWIDGETBUTTON_H

TreeWidgetButton.pro

#-------------------------------------------------
#
# Project created by QtCreator 2016-09-13T10:02:21
#
#-------------------------------------------------

QT       += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = TreeWidgetButton
TEMPLATE = app


SOURCES += main.cpp\
        treewidgetbutton.cpp

HEADERS  += treewidgetbutton.h

FORMS    += treewidgetbutton.ui

treewidgetbutton.ui

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
 <class>TreeWidgetButton</class>
 <widget class="QDialog" name="TreeWidgetButton">
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>400</width>
    <height>300</height>
   </rect>
  </property>
  <property name="windowTitle">
   <string>TreeWidgetButton</string>
  </property>
  <layout class="QGridLayout" name="gridLayout">
   <item row="0" column="0">
    <widget class="QTreeWidget" name="treeWidget">
     <column>
      <property name="text">
       <string>Button Column</string>
      </property>
     </column>
    </widget>
   </item>
   <item row="1" column="0">
    <widget class="QLabel" name="label">
     <property name="text">
      <string>Which Button Was Clicked</string>
     </property>
    </widget>
   </item>
  </layout>
 </widget>
 <layoutdefault spacing="6" margin="11"/>
 <resources/>
 <connections/>
</ui>