diff --git a/SoftwareDesign/Code/2-3-4/mainwindow.cpp b/SoftwareDesign/Code/2-3-4/mainwindow.cpp
index 41a26bd..0e7b38a 100644
--- a/SoftwareDesign/Code/2-3-4/mainwindow.cpp
+++ b/SoftwareDesign/Code/2-3-4/mainwindow.cpp
@@ -2,14 +2,39 @@
 #include "ui_mainwindow.h"
 
 MainWindow::MainWindow(QWidget *parent)
-    : QMainWindow(parent)
-    , ui(new Ui::MainWindow)
-{
-    ui->setupUi(this);
+    : QMainWindow(parent), ui(new Ui::MainWindow) {
+  ui->setupUi(this);
+  ui->centralwidget->setMouseTracking(true);
+  setMouseTracking(true);
 }
 
-MainWindow::~MainWindow()
-{
-    delete ui;
-}
+MainWindow::~MainWindow() { delete ui; }
 
+void MainWindow::mousePressEvent(QMouseEvent *e) {
+  if (e->button() == Qt::LeftButton)
+    ui->l1->setText("Left button press");
+  else
+    ui->l1->setText("Right button press");
+}
+void MainWindow::mouseReleaseEvent(QMouseEvent *e) {
+  if (e->button() == Qt::LeftButton)
+    ui->l1->setText("Left button release");
+  else
+    ui->l1->setText("Right button release");
+}
+void MainWindow::mouseDoubleClickEvent(QMouseEvent *e) {
+  if (e->button() == Qt::LeftButton)
+    ui->l1->setText("Left button double click");
+  else
+    ui->l1->setText("Right button double click");
+}
+void MainWindow::mouseMoveEvent(QMouseEvent *e) {
+  QPoint pos = e->globalPos();
+  ui->l2->setText(QString("(%1,%2)").arg(pos.rx()).arg(pos.ry()));
+}
+void MainWindow::wheelEvent(QWheelEvent *e) {
+  if (e->delta() > 0)
+    ui->l1->setText("scroll up");
+  else
+    ui->l1->setText("scroll down");
+}
diff --git a/SoftwareDesign/Code/2-3-4/mainwindow.h b/SoftwareDesign/Code/2-3-4/mainwindow.h
index f904d83..5e927f1 100644
--- a/SoftwareDesign/Code/2-3-4/mainwindow.h
+++ b/SoftwareDesign/Code/2-3-4/mainwindow.h
@@ -2,8 +2,8 @@
 #define MAINWINDOW_H
 
 #include <QMainWindow>
-#include <QWheelEvent>
 #include <QMouseEvent>
+#include <QWheelEvent>
 
 QT_BEGIN_NAMESPACE
 namespace Ui {
@@ -22,6 +22,10 @@ private:
   Ui::MainWindow *ui;
 
 protected:
-  void mouseEvent(QMouseEvent *e);
+  void mousePressEvent(QMouseEvent *e);
+  void mouseReleaseEvent(QMouseEvent *e);
+  void mouseDoubleClickEvent(QMouseEvent *e);
+  void mouseMoveEvent(QMouseEvent *e);
+  void wheelEvent(QWheelEvent *e);
 };
 #endif // MAINWINDOW_H
diff --git a/SoftwareDesign/Code/2-3-4/mainwindow.ui b/SoftwareDesign/Code/2-3-4/mainwindow.ui
index ac966a0..ad126f4 100644
--- a/SoftwareDesign/Code/2-3-4/mainwindow.ui
+++ b/SoftwareDesign/Code/2-3-4/mainwindow.ui
@@ -14,12 +14,12 @@
    <string>4490</string>
   </property>
   <widget class="QWidget" name="centralwidget">
-   <widget class="QLabel" name="label">
+   <widget class="QLabel" name="l2">
     <property name="geometry">
      <rect>
-      <x>110</x>
+      <x>450</x>
       <y>160</y>
-      <width>77</width>
+      <width>311</width>
       <height>25</height>
      </rect>
     </property>
@@ -27,12 +27,12 @@
      <string>TextLabel</string>
     </property>
    </widget>
-   <widget class="QLabel" name="label_2">
+   <widget class="QLabel" name="l1">
     <property name="geometry">
      <rect>
-      <x>330</x>
+      <x>160</x>
       <y>160</y>
-      <width>77</width>
+      <width>221</width>
       <height>25</height>
      </rect>
     </property>