From 0fe75ad08f4ff665a11638baeb1a3e0a41bce249 Mon Sep 17 00:00:00 2001
From: Andy Williams <andy@andy.xyz>
Date: Thu, 14 Feb 2019 22:59:25 +0000
Subject: [PATCH] Fix issue where SetFullScreen() would not work before Run()

Fixes #119
---
 driver/gl/window.go | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/driver/gl/window.go b/driver/gl/window.go
index 9a44c0b29f..f30aae47c5 100644
--- a/driver/gl/window.go
+++ b/driver/gl/window.go
@@ -36,6 +36,7 @@ type window struct {
 	fullScreen bool
 	fixedSize  bool
 	padded     bool
+	visible    bool
 
 	mousePos fyne.Position
 	onClosed func()
@@ -57,8 +58,11 @@ func (w *window) FullScreen() bool {
 }
 
 func (w *window) SetFullScreen(full bool) {
+	w.fullScreen = full
+	if !w.visible {
+		return
+	}
 	runOnMainAsync(func() {
-		w.fullScreen = full
 		monitor := w.getMonitorForWindow()
 		mode := monitor.GetVideoMode()
 
@@ -234,13 +238,19 @@ func (w *window) detectScale() float32 {
 
 func (w *window) Show() {
 	runOnMainAsync(func() {
+		w.visible = true
 		w.viewport.Show()
+
+		if w.fullScreen {
+			w.SetFullScreen(true)
+		}
 	})
 }
 
 func (w *window) Hide() {
 	runOnMainAsync(func() {
 		w.viewport.Hide()
+		w.visible = false
 	})
 }