QFileDialog on WIndows

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
main.cpp
-------------
#include "mainwindow.h"
#include <QApplication>

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

    return a.exec();
}

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
mainwindow.h
-------------
#define MAINWINDOW_H

#include <QMainWindow>
#include "ui_mainwindow.h"

namespace Ui {
class MainWindow;
}

class MainWindow : public QMainWindow
{
    Q_OBJECT

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

protected slots:
    void on_toolButton_clicked();

private:
    Ui::MainWindow *ui;
};

#endif // MAINWINDOW_H

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
mainwindow.cpp
---------------
#include <QtWidgets>
#include <QCoreApplication>

#include "mainwindow.h"
#include "ui_mainwindow.h"

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
}

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

void MainWindow::on_toolButton_clicked()
{
    // create a generic FileDialog
    QFileDialog dialog(NULL, tr("Select a disk image"));
    dialog.setNameFilter(tr("Image Files (*.img *.IMG);;*.*"));
    dialog.setFileMode(QFileDialog::AnyFile);  // should be default
    dialog.setViewMode(QFileDialog::Detail);   // should be default
    dialog.setAcceptMode(QFileDialog::AcceptOpen);  // should be default
    dialog.setOption(QFileDialog::DontConfirmOverwrite, true);

    QString fileLocation = NULL;
    if (dialog.exec())
    {
        // selectedFiles returns a QStringList - only expecting 1 filename,
        //  so use the zero'th element from that list
        fileLocation = (dialog.selectedFiles())[0];
    }

    if (!fileLocation.isNull())
    {
        ui->label->setText(fileLocation);
    }
}

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
mainwindow.ui
----------------
<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
 <class>MainWindow</class>
 <widget class="QMainWindow" name="MainWindow">
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>400</width>
    <height>300</height>
   </rect>
  </property>
  <property name="windowTitle">
   <string>MainWindow</string>
  </property>
  <widget class="QWidget" name="centralWidget">
   <widget class="QToolButton" name="toolButton">
    <property name="geometry">
     <rect>
      <x>180</x>
      <y>110</y>
      <width>25</width>
      <height>19</height>
     </rect>
    </property>
    <property name="text">
     <string>...</string>
    </property>
   </widget>
   <widget class="QLabel" name="label">
    <property name="geometry">
     <rect>
      <x>45</x>
      <y>170</y>
      <width>291</width>
      <height>21</height>
     </rect>
    </property>
    <property name="text">
     <string>TextLabel</string>
    </property>
   </widget>
  </widget>
  <widget class="QMenuBar" name="menuBar">
   <property name="geometry">
    <rect>
     <x>0</x>
     <y>0</y>
     <width>400</width>
     <height>21</height>
    </rect>
   </property>
  </widget>
  <widget class="QToolBar" name="mainToolBar">
   <attribute name="toolBarArea">
    <enum>TopToolBarArea</enum>
   </attribute>
   <attribute name="toolBarBreak">
    <bool>false</bool>
   </attribute>
  </widget>
  <widget class="QStatusBar" name="statusBar"/>
 </widget>
 <layoutdefault spacing="6" margin="11"/>
 <resources/>
 <connections/>
</ui>

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dlgTest.pro
-------------
#-------------------------------------------------
#
# Project created by QtCreator 2014-04-21T15:21:13
#
#-------------------------------------------------

QT       += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = dlgTest
TEMPLATE = app


SOURCES += main.cpp\
        mainwindow.cpp

HEADERS  += mainwindow.h

FORMS    += mainwindow.ui