Breakout: Add player lives game mechanic and pause functionality

Author: https://github.com/bcoles
Commit: https://github.com/SerenityOS/serenity/commit/0cc970bd07c
Pull-request: https://github.com/SerenityOS/serenity/pull/4465

Games/Breakout/Game.cpp

@@ -29,6 +29,7 @@
 #include <LibGUI/Application.h>
 #include <LibGUI/MessageBox.h>
 #include <LibGUI/Painter.h>
+#include <LibGfx/Font.h>
 #include <LibGfx/StandardCursor.h>
 
 namespace Breakout {
@@ -39,6 +40,7 @@ Game::Game()
     auto level_dialog = LevelSelectDialog::show(m_board, window());
     if (level_dialog != GUI::Dialog::ExecOK)
         m_board = -1;
+    set_paused(false);
     start_timer(16);
     reset();
 }
@@ -56,6 +58,9 @@ void Game::reset_paddle()
 
 void Game::reset()
 {
+    m_lives = 3;
+    m_pause_count = 0;
+    m_cheater = false;
     reset_ball();
     reset_paddle();
     generate_bricks();
@@ -63,6 +68,8 @@ void Game::reset()
 
 void Game::generate_bricks()
 {
+    m_bricks = {};
+
     Gfx::Color colors[] = {
         Gfx::Color::Red,
         Gfx::Color::Green,
@@ -105,8 +112,24 @@ void Game::generate_bricks()
     }
 }
 
+void Game::set_paused(bool paused)
+{
+    m_paused = paused;
+
+    if (m_paused) {
+        set_override_cursor(Gfx::StandardCursor::None);
+        m_pause_count++;
+    } else {
+        set_override_cursor(Gfx::StandardCursor::Hidden);
+    }
+
+    update();
+}
+
 void Game::timer_event(Core::TimerEvent&)
 {
+    if (m_paused)
+        return;
     tick();
 }
 
@@ -125,10 +148,23 @@ void Game::paint_event(GUI::PaintEvent& event)
         if (!brick.dead)
             painter.fill_rect(enclosing_int_rect(brick.rect), brick.color);
     }
+
+    int msg_width = font().width(String::formatted("Lives: {}", m_lives));
+    int msg_height = font().glyph_height();
+    painter.draw_text({ (game_width - msg_width - 2), 2, msg_width, msg_height }, String::formatted("Lives: {}", m_lives), Gfx::TextAlignment::Center, Color::White);
+
+    if (m_paused) {
+        const char* msg = m_cheater ? "C H E A T E R" : "P A U S E D";
+        int msg_width = font().width(msg);
+        int msg_height = font().glyph_height();
+        painter.draw_text({ (game_width / 2) - (msg_width / 2), (game_height / 2) - (msg_height / 2), msg_width, msg_height }, msg, Gfx::TextAlignment::Center, Color::White);
+    }
 }
 
 void Game::keyup_event(GUI::KeyEvent& event)
 {
+    if (m_paused)
+        return;
     switch (event.key()) {
     case Key_Left:
         m_paddle.moving_left = false;
@@ -143,6 +179,8 @@ void Game::keyup_event(GUI::KeyEvent& event)
 
 void Game::keydown_event(GUI::KeyEvent& event)
 {
+    if (m_paused)
+        return;
     switch (event.key()) {
     case Key_Escape:
         GUI::Application::the()->quit();
@@ -160,6 +198,8 @@ void Game::keydown_event(GUI::KeyEvent& event)
 
 void Game::mousemove_event(GUI::MouseEvent& event)
 {
+    if (m_paused)
+        return;
     float new_paddle_x = event.x() - m_paddle.rect.width() / 2;
     new_paddle_x = max(0.0f, new_paddle_x);
     new_paddle_x = min(game_width - m_paddle.rect.width(), new_paddle_x);
@@ -185,7 +225,13 @@ void Game::reset_ball()
 void Game::hurt()
 {
     stop_timer();
-    GUI::MessageBox::show(window(), "Ouch!", "Breakout", GUI::MessageBox::Type::Warning, GUI::MessageBox::InputType::OK);
+    m_lives--;
+    if (m_lives <= 0) {
+        update();
+        GUI::MessageBox::show(window(), "You lose!", "Breakout", GUI::MessageBox::Type::Information, GUI::MessageBox::InputType::OK);
+        reset();
+    }
+    sleep(1);
     reset_ball();
     reset_paddle();
     start_timer(16);
@@ -194,7 +240,12 @@ void Game::hurt()
 void Game::win()
 {
     stop_timer();
-    GUI::MessageBox::show(window(), "You win!", "Breakout", GUI::MessageBox::Type::Information, GUI::MessageBox::InputType::OK);
+    update();
+    if (m_cheater) {
+        GUI::MessageBox::show(window(), "You cheated not only the game, but yourself.", "Breakout", GUI::MessageBox::Type::Information, GUI::MessageBox::InputType::OK);
+    } else {
+        GUI::MessageBox::show(window(), "You win!", "Breakout", GUI::MessageBox::Type::Information, GUI::MessageBox::InputType::OK);
+    }
     reset();
     start_timer(16);
 }
@@ -268,6 +319,9 @@ void Game::tick()
 
     m_ball = new_ball;
 
+    if (m_pause_count > 50)
+        m_cheater = true;
+
     update();
 }
 

Games/Breakout/Game.h

@@ -39,6 +39,8 @@ public:
 
     virtual ~Game() override;
 
+    void set_paused(bool paused);
+
 private:
     Game();
 
@@ -94,7 +96,11 @@ private:
         }
     };
 
+    bool m_paused;
+    int m_lives;
     int m_board;
+    long m_pause_count;
+    bool m_cheater;
     Ball m_ball;
     Paddle m_paddle;
     Vector<Brick> m_bricks;

Games/Breakout/main.cpp

@@ -59,16 +59,24 @@ int main(int argc, char** argv)
 
     auto window = GUI::Window::construct();
     window->resize(Breakout::Game::game_width, Breakout::Game::game_height);
+    window->set_resizable(false);
+    window->set_double_buffering_enabled(false);
+    window->set_title("Breakout");
     auto app_icon = GUI::Icon::default_icon("app-breakout");
     window->set_icon(app_icon.bitmap_for_size(16));
-    window->set_title("Breakout");
-    window->set_double_buffering_enabled(false);
-    window->set_main_widget<Breakout::Game>();
+    auto& game = window->set_main_widget<Breakout::Game>();
     window->show();
 
     auto menubar = GUI::MenuBar::construct();
 
     auto& app_menu = menubar->add_menu("Breakout");
+    app_menu.add_action(GUI::Action::create_checkable("Pause", { {}, Key_P }, [&](auto& action) {
+        game.set_paused(action.is_checked());
+        return;
+    }));
+
+    app_menu.add_separator();
+
     app_menu.add_action(GUI::CommonActions::make_quit_action([](auto&) {
         GUI::Application::the()->quit();
         return;