Added context menu, set badge via remote.

app/assets/javascripts/app/controllers/widget/electron_events.coffee

@@ -1,10 +1,86 @@
 class Widget
   constructor: ->
     return if !window.require
-    ipcRenderer = window.require('electron').ipcRenderer
+    electron = window.require('electron')
-    return if !ipcRenderer
+    return if !electron
+    remote = electron.remote
     App.Event.bind('online_notification_counter', (e) ->
-      ipcRenderer.send('set-badge', e)
+      setBadge(e)
     )
 
+    Menu = remote.Menu
+    MenuItem = remote.MenuItem
+
+    createDefault = ->
+      menu = new Menu()
+      menu.append(new MenuItem({
+        label: 'Cut',
+        role: 'cut'
+      }))
+      menu.append(new MenuItem({
+        label: 'Copy',
+        role: 'copy'
+      }))
+      menu.append(new MenuItem({
+        label: 'Paste',
+        role: 'paste'
+      }))
+      menu.append(new MenuItem({
+        label: 'Select All',
+        role: 'selectall'
+      }))
+      menu
+
+    menu = createDefault()
+    window.addEventListener('contextmenu', (e) ->
+      menu.popup(remote.getCurrentWindow())
+      false
+    )
+
+    badgeDataURL = (text) ->
+      scale = 2 # should rely display dpi
+      size = 16 * scale
+      canvas = document.createElement('canvas')
+      canvas.setAttribute('width', size)
+      canvas.setAttribute('height', size)
+      ctx = canvas.getContext('2d')
+
+      # circle
+      ctx.fillStyle = '#FF1744' # Material Red A400
+      ctx.beginPath()
+      ctx.arc(size / 2, size / 2, size / 2, 0, Math.PI * 2)
+      ctx.fill()
+
+      # text
+      ctx.fillStyle = '#ffffff'
+      ctx.textAlign = 'center'
+      ctx.textBaseline = 'middle'
+      ctx.font = (11 * scale) + 'px sans-serif'
+      ctx.fillText(text, size / 2, size / 2, size)
+
+      canvas.toDataURL()
+
+    setBadgeWindows = (content) ->
+      sendBadge = (dataURL, description) ->
+        electron.ipcRenderer.send('win32-overlay', {
+          overlayDataURL: dataURL,
+          description: description,
+          content: content,
+        })
+
+      if content isnt ''
+        dataURL = badgeDataURL.createDataURL(content.toString())
+        sendBadge(dataURL, 'You have unread messages (' + content + ')')
+      else
+        sendBadge(null, 'You have no unread messages')
+
+    setBadgeOSX = (content) ->
+      remote.app.dock.setBadge(content)
+
+    setBadge = (content) ->
+      if process.platform is 'win32'
+        setBadgeWindows(content)
+      else if process.platform is 'darwin'
+        setBadgeOSX(content)
+
 App.Config.set('aaa_electron_events', Widget, 'Navigations')