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samples/Sample 5 - File Loading/main.cpp

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+#include <AppCore/App.h>
+#include <AppCore/Window.h>
+#include <AppCore/Overlay.h>
+#include <AppCore/JSHelpers.h>
+
+using namespace ultralight;
+
+///
+///  Welcome to Sample 5!
+///
+///  In this sample we'll show how to load assets from the local file system.
+///
+///  __FileSystem API__
+///
+///  Ultralight uses the FileSystem interface (part of the Platform API) to load file:/// URLs and
+///  handle JavaScript FileSystem API requests.
+///
+///  AppCore provides default FileSystem implementations for Windows, macOS, and Linux
+///  out-of-the-box. 
+///
+///   * On Windows/Linux, it will use ./assets/ as the base file path.
+///   * On macOS, it will use the app bundle's @resource_path
+///
+///  You can configure the base file system path by passing your own Settings to App::Create.
+///
+///  When building your application, it's best to use a CMake script to copy these assets to your
+///  application's output folder/bundle. Look at the CMakeLists.txt of this sample for an example.
+///
+///  __Custom FileSystem API__
+///
+///  You can provide your own FileSystem implementation in case you need greater control over file
+///  loading. This is useful if you're using your own data format and/or need to encrypt or
+///  compress resources.
+///
+///  See <Ultralight/platform/FileSystem.h> for more information.
+///
+class MyApp : public WindowListener {
+  RefPtr<App> app_;
+  RefPtr<Window> window_;
+  RefPtr<Overlay> overlay_;
+public:
+  MyApp() {
+    ///
+    /// Create our main App instance.
+    ///
+    app_ = App::Create();
+
+    ///
+    /// Create our Window using default window flags.
+    ///
+    window_ = Window::Create(app_->main_monitor(), 450, 700, false, kWindowFlags_Titled);
+
+    ///
+    /// Set the title of our window.
+    ///
+    window_->SetTitle("Ultralight Sample 5 - File Loading");
+
+    window_->set_listener(this);
+
+    ///
+    /// Create an Overlay using the same dimensions as our Window.
+    ///
+    overlay_ = Overlay::Create(window_, window_->width(), window_->height(), 0, 0);
+
+    ///
+    /// Load a file from the FileSystem.
+    ///
+    ///  **IMPORTANT**: Make sure `file:///` has three (3) forward slashes.
+    ///
+    overlay_->view()->LoadURL("file:///app.html");
+  }
+
+  virtual ~MyApp() {}
+
+  ///
+  /// Inherited from WindowListener, called when the Window is closed.
+  /// 
+  /// We exit the application when the window is closed.
+  ///
+  virtual void OnClose(ultralight::Window* window) override {
+    app_->Quit();
+  }
+
+  ///
+  /// Inherited from WindowListener, called when the Window is resized.
+  /// 
+  /// (Not used in this sample)
+  ///
+  virtual void OnResize(ultralight::Window* window, uint32_t width, uint32_t height) override {}
+
+  void Run() {
+    app_->Run();
+  }
+};
+
+int main() {
+  MyApp app;
+  app.Run();
+
+  return 0;
+}