Add score

src/mainwindow.cpp

@@ -68,6 +68,9 @@ void MainWindow::ballCaught(Ball* ball) {
     if (m_spawnInterval < MIN_SPAWN_SPEED)
         m_spawnInterval = MIN_SPAWN_SPEED;
     deleteBall(ball);
+    m_score++;
+
+    ui->label->setText("Score: " + QString::number(m_score));
 }
 
 void MainWindow::onBallSpawn() {

src/mainwindow.h

@@ -39,6 +39,7 @@ class MainWindow : public QMainWindow {
     void keyReleaseEvent(QKeyEvent* event) override;
 
   private:
+    int m_score;
     float m_spawnInterval;
     QTimer m_spawnTimer;
     Ui::MainWindow* ui;

src/mainwindow.ui

@@ -13,7 +13,21 @@
   <property name="windowTitle">
    <string>MainWindow</string>
   </property>
-  <widget class="QWidget" name="centralwidget"/>
+  <widget class="QWidget" name="centralwidget">
+   <widget class="QLabel" name="label">
+    <property name="geometry">
+     <rect>
+      <x>10</x>
+      <y>0</y>
+      <width>101</width>
+      <height>21</height>
+     </rect>
+    </property>
+    <property name="text">
+     <string>Score: 0</string>
+    </property>
+   </widget>
+  </widget>
   <widget class="QMenuBar" name="menubar">
    <property name="geometry">
     <rect>