Tracking issue of tao interface for Gtk

[wusyong]

We are going to have a new unified interface to build window after tauri-apps/wry#163. It should cover most usage in Tauri. But there are still many missing features for gtk. Below is the list of features (but not limited to):

• [ ] window methods (see comment below)
• [ ] events (see comment below)
• [x] platform traits (need to discuss what traits and methods are needed)
• [x] monitor module
  • [x] MonitorHandle
  • [x] VideoMode

[wusyong]

Missing window methods:

• [x] raw_window_handle
• [ ] set_ime_position
• [x] set_cursor_position
• [x] current_monitor
• [x] available_monitor
• [x] primary_monitor

[wusyong]

Missing events:

• [ ] DeviceEvent #591
  • [ ] Added
  • [ ] Button
  • [x] Key
  • [ ] Motion
  • [ ] MouseMotion
  • [ ] MouseWheel
  • [ ] Removed
  • [ ] Text
• [x] LoopDestroyed
• [x] MainEventsCleared
• [x] NewEvents
  • [x] Init
  • [x] Poll
  • [x] ResumeTimeReached
  • [x] WaitCancelled
• [x] RedrawEventsCleared
• [x] RedrawRequested
• [x] Resumed
• [x] Suspended
• [x] UserEvent
• [ ] WindowEvent
  • [ ] AxisMotion
  • [x] CloseRequested
  • [x] CursorEntered
  • [x] CursorLeft
  • [x] CursorMoved
  • [x] Destroyed
  • [x] Focused
  • [x] Moved
  • [X] Resized
  • [ ] DroppedFile
  • [ ] HoveredFile
  • [ ] HoveredFileCancelled
  • [x] KeyboardInput
  • [x] ModifiersChanged
  • [x] MouseInput
  • [ ] MouseWheel
  • [X] delta
  • [ ] phase (currently a wrong value is used)
  • [ ] ReceivedCharacter
  • [ ] ScaleFactorChanged
  • [ ] ~ThemeChanged~ Unsupported
  • [ ] Touch
  • [ ] TouchpadPressure