From 80adb54acfc5a42462e4e84ba17e36ee2d2c4f4b Mon Sep 17 00:00:00 2001
From: Leonardo Zide <leozide@gmail.com>
Date: Tue, 29 Dec 2020 14:42:59 -0800
Subject: [PATCH] Always keep 1 context valid.

---
 common/lc_mainwindow.cpp | 3 ---
 common/lc_viewwidget.cpp | 9 +++++++--
 2 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/common/lc_mainwindow.cpp b/common/lc_mainwindow.cpp
index d0136001..fb096382 100644
--- a/common/lc_mainwindow.cpp
+++ b/common/lc_mainwindow.cpp
@@ -83,9 +83,6 @@ void lcModelTabWidget::Clear()
 		View->Clear();
 	mViews.RemoveAll();
 	mActiveView = nullptr;
-	lcViewWidget* Widget = (lcViewWidget*)layout()->itemAt(0)->widget();
-	delete Widget->GetView();
-	Widget->SetView(nullptr);
 }
 
 lcMainWindow::lcMainWindow()
diff --git a/common/lc_viewwidget.cpp b/common/lc_viewwidget.cpp
index 7a5010c1..94bcae22 100644
--- a/common/lc_viewwidget.cpp
+++ b/common/lc_viewwidget.cpp
@@ -51,12 +51,14 @@ QSize lcViewWidget::sizeHint() const
 
 void lcViewWidget::SetView(lcView* View)
 {
-	mView = View;
-
 	if (View)
 	{
 		if (context())
+		{
+			makeCurrent();
 			View->mContext->SetGLContext(context());
+		}
+
 		View->SetWidget(this);
 		const float Scale = GetDeviceScale();
 		View->SetSize(width() * Scale, height() * Scale);
@@ -64,6 +66,9 @@ void lcViewWidget::SetView(lcView* View)
 		if (hasFocus())
 			View->SetFocus(true);
 	}
+
+	delete mView;
+	mView = View;
 }
 
 void lcViewWidget::SetPreviewPosition(const QRect& ParentRect)