From b2c56940ebe4ac5ec8875616ec7bd07765cd4be8 Mon Sep 17 00:00:00 2001
From: Paul Rouget <me@paulrouget.com>
Date: Thu, 22 Aug 2019 07:55:17 +0200
Subject: [PATCH] Resize Servo on surface resize

---
 .../hololens/ServoApp/ServoControl/ServoControl.cpp    | 10 ++++++++++
 support/hololens/ServoApp/ServoControl/ServoControl.h  |  7 +++++--
 2 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/support/hololens/ServoApp/ServoControl/ServoControl.cpp b/support/hololens/ServoApp/ServoControl/ServoControl.cpp
index ef172357bfe..56c4938490e 100644
--- a/support/hololens/ServoApp/ServoControl/ServoControl.cpp
+++ b/support/hololens/ServoApp/ServoControl/ServoControl.cpp
@@ -51,6 +51,8 @@ void ServoControl::OnLoaded(IInspectable const &, RoutedEventArgs const &) {
       });
   panel.ManipulationDelta(
       std::bind(&ServoControl::OnSurfaceManipulationDelta, this, _1, _2));
+  Panel().SizeChanged(
+      std::bind(&ServoControl::OnSurfaceResized, this, _1, _2));
   InitializeConditionVariable(&mGLCondVar);
   InitializeCriticalSection(&mGLLock);
   CreateRenderSurface();
@@ -100,6 +102,14 @@ void ServoControl::OnSurfaceClicked(IInspectable const &,
   e.Handled(true);
 }
 
+void ServoControl::OnSurfaceResized(IInspectable const &,
+                                    SizeChangedEventArgs const &e) {
+  auto size = e.NewSize();
+  auto w = size.Width * mDPI;
+  auto h = size.Height * mDPI;
+  RunOnGLThread([=] { mServo->SetSize(w, h); });
+}
+
 void ServoControl::GoBack() {
   RunOnGLThread([=] { mServo->GoBack(); });
 }
diff --git a/support/hololens/ServoApp/ServoControl/ServoControl.h b/support/hololens/ServoApp/ServoControl/ServoControl.h
index fd708cd93f0..54d1caf8c12 100644
--- a/support/hololens/ServoApp/ServoControl/ServoControl.h
+++ b/support/hololens/ServoApp/ServoControl/ServoControl.h
@@ -62,7 +62,7 @@ struct ServoControl : ServoControlT<ServoControl>, public servo::ServoDelegate {
     mOnCaptureGesturesStartedEvent.remove(token);
   }
 
-    winrt::event_token OnCaptureGesturesEnded(EventDelegate const &handler) {
+  winrt::event_token OnCaptureGesturesEnded(EventDelegate const &handler) {
     return mOnCaptureGesturesEndedEvent.add(handler);
   };
   void OnCaptureGesturesEnded(winrt::event_token const &token) noexcept {
@@ -118,7 +118,10 @@ private:
 
   void OnSurfaceManipulationDelta(
       IInspectable const &,
-      Windows::UI::Xaml::Input::ManipulationDeltaRoutedEventArgs const &e);
+      Windows::UI::Xaml::Input::ManipulationDeltaRoutedEventArgs const &);
+
+  void OnSurfaceResized(IInspectable const &,
+                        Windows::UI::Xaml::SizeChangedEventArgs const &);
 
   template <typename Callable> void RunOnUIThread(Callable);
   void RunOnGLThread(std::function<void()>);