From fbe69615284c2bacedb23510c292ac8021df845d Mon Sep 17 00:00:00 2001
From: Hajime Hoshi <hajimehoshi@gmail.com>
Date: Tue, 20 Apr 2021 22:53:15 +0900
Subject: [PATCH] internal/uidriver/glfw: Bug fix: Delay to enable SetSize
 callback

On Linux, the SetSize callback is invoked with an unexpected value
at the initial phase. Just delay it until the initialization
finishes.
---
 internal/uidriver/glfw/ui.go | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/internal/uidriver/glfw/ui.go b/internal/uidriver/glfw/ui.go
index 2a1f5fa6c..fa73b3d2e 100644
--- a/internal/uidriver/glfw/ui.go
+++ b/internal/uidriver/glfw/ui.go
@@ -814,7 +814,6 @@ func (u *UserInterface) init() error {
 	if err := u.createWindow(); err != nil {
 		return err
 	}
-	u.setSizeCallbackEnabled = true
 
 	setSize := func() {
 		ww, wh := u.getInitWindowSize()
@@ -849,6 +848,10 @@ func (u *UserInterface) init() error {
 		g.SetWindow(u.nativeWindow())
 	}
 
+	// Enable the SetSize callback after all the initialization finishes. Or, unexpected the callback
+	// is fired unexpectedly at the initial phase with a very small size on Linux.
+	u.setSizeCallbackEnabled = true
+
 	return nil
 }