added "File -> Open" menu item to main menu

addresses #2

src/Ation.js

@@ -40,7 +40,7 @@ class Ation {
 			if (!this.windowManager.mainWindow)
 				return null;
 
-			const result = await dialog.showOpenDialog(this.mainWindow, {
+			const result = await dialog.showOpenDialog(this.windowManager.mainWindow, {
 				title   : "open file",
 				filters : [
 					{
@@ -57,7 +57,8 @@ class Ation {
 			const basePath     = path.dirname(result.filePaths[0]);
 			const data         = parser(fileContents);
 
-			return [basePath, data];
+
+			this.windowManager.mainWindow.send("Ation::openFile", [basePath, data]);
 	}
 }
 Ation.Instances = 0;

src/MainMenu.js

@@ -15,6 +15,16 @@ class MainMenu {
 			...(process.platform === "darwin" ? [{
 				role : "appMenu"
 			}] : []),
+			{
+				label   : "File",
+				submenu : [
+					{
+						label       : "Open",
+						accelerator : "CommandOrControl+O",
+						click       : () => this.app.openFile()
+					}
+				]
+			},
 			{
 				role : "windowMenu"
 			}

src/WindowManager.js

@@ -17,7 +17,7 @@ class WindowManager {
 
 		app.whenReady().then(() => this.init());
 
-		ipcMain.handle("WindowManager::openFile", async () => this.app.openFile());
+		ipcMain.on("WindowManager::openFileDialog", () => this.app.openFile());
 	}
 
 	init() {