From 8fc4e33b97372d93b1bcc4b598e5c8e2f15652d8 Mon Sep 17 00:00:00 2001
From: crupest <crupest@outlook.com>
Date: Fri, 3 Jan 2020 00:43:46 +0800
Subject: ...

---
 src/ui/render/window_render_object.cpp | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

(limited to 'src/ui/render/window_render_object.cpp')

diff --git a/src/ui/render/window_render_object.cpp b/src/ui/render/window_render_object.cpp
index 1001be87..43269d09 100644
--- a/src/ui/render/window_render_object.cpp
+++ b/src/ui/render/window_render_object.cpp
@@ -21,7 +21,9 @@ class WindowRenderHost : public IRenderHost,
   void InvalidateLayout() override;
 
   void InvalidatePaint() override {
-    render_object_->GetWindow()->GetNativeWindow()->RequestRepaint();
+    if (const auto native_window =
+            render_object_->GetWindow()->ResolveNativeWindow())
+      native_window->RequestRepaint();
   }
 
   IEvent<AfterLayoutEventArgs>* AfterLayoutEvent() override {
@@ -61,7 +63,10 @@ WindowRenderObject::WindowRenderObject(Window* window)
 }
 
 void WindowRenderObject::Relayout() {
-  const auto client_size = window_->GetNativeWindow()->GetClientSize();
+  const auto native_window = window_->ResolveNativeWindow();
+  const auto client_size = native_window
+                               ? native_window->GetClientSize()
+                               : Size{100, 100};  // a reasonable assumed size
   Measure(client_size);
   Layout(Rect{Point{}, client_size});
 }
-- 
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