From c1a990c0e2451a1c98734b35557182327561988b Mon Sep 17 00:00:00 2001
From: Vadim Lopatin <coolreader.org@gmail.com>
Date: Tue, 30 May 2017 11:50:05 +0300
Subject: [PATCH] fix #358

---
 src/dlangui/platforms/console/consoleapp.d | 4 ++++
 src/dlangui/platforms/sdl/sdlapp.d         | 4 ++++
 src/dlangui/platforms/windows/winapp.d     | 4 ++++
 3 files changed, 12 insertions(+)

diff --git a/src/dlangui/platforms/console/consoleapp.d b/src/dlangui/platforms/console/consoleapp.d
index 20501eea..94c12365 100644
--- a/src/dlangui/platforms/console/consoleapp.d
+++ b/src/dlangui/platforms/console/consoleapp.d
@@ -23,6 +23,10 @@ class ConsoleWindow : Window {
     }
     /// show window
     override void show() {
+        if (!_mainWidget) {
+            Log.e("Window is shown without main widget");
+            _mainWidget = new Widget();
+        }
         _visible = true;
     }
     private dstring _windowCaption;
diff --git a/src/dlangui/platforms/sdl/sdlapp.d b/src/dlangui/platforms/sdl/sdlapp.d
index c4a6ef2a..e67aff19 100755
--- a/src/dlangui/platforms/sdl/sdlapp.d
+++ b/src/dlangui/platforms/sdl/sdlapp.d
@@ -342,6 +342,10 @@ class SDLWindow : Window {
 
     override void show() {
         Log.d("SDLWindow.show() - ", windowCaption);
+        if (!_mainWidget) {
+            Log.e("Window is shown without main widget");
+            _mainWidget = new Widget();
+        }
         if (_mainWidget && !(_flags & WindowFlag.Resizable)) {
             _mainWidget.measure(SIZE_UNSPECIFIED, SIZE_UNSPECIFIED);
             SDL_SetWindowSize(_win, _mainWidget.measuredWidth, _mainWidget.measuredHeight);
diff --git a/src/dlangui/platforms/windows/winapp.d b/src/dlangui/platforms/windows/winapp.d
index 1049cb96..77f110fd 100644
--- a/src/dlangui/platforms/windows/winapp.d
+++ b/src/dlangui/platforms/windows/winapp.d
@@ -427,6 +427,10 @@ class Win32Window : Window {
         return _drawbuf;
     }
     override void show() {
+        if (!_mainWidget) {
+            Log.e("Window is shown without main widget");
+            _mainWidget = new Widget();
+        }
         ReleaseCapture();
         if (!(_flags & WindowFlag.Resizable) && _mainWidget) {
             _mainWidget.measure(SIZE_UNSPECIFIED, SIZE_UNSPECIFIED);