From f722fb1155cb3d198c450a68d7db82a0bf6318bf Mon Sep 17 00:00:00 2001
From: Jonas Kümmerlin <jonas@kuemmerlin.eu>
Date: Thu, 11 Jun 2020 14:37:45 +0200
Subject: concerted effort to reduce unneccessary redraws on transparent
 backgrounds

---
 widgetfactory.cpp | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'widgetfactory.cpp')

diff --git a/widgetfactory.cpp b/widgetfactory.cpp
index 25d0ce1..67d5c5c 100644
--- a/widgetfactory.cpp
+++ b/widgetfactory.cpp
@@ -178,7 +178,12 @@ commonPanelMessage(void *closure, HWND hwnd, UINT msg, WPARAM wparam, LPARAM lpa
     }
 
     if (msg == WM_SIZE && priv->bgmode == BG_GRADIENT) {
+        // HACK doing the invalidation before the layout leads to unnecessary
+        // redraws. I have no idea why, but switching the order of the calls
+        // makes the problem mostly go away.
+        LRESULT rv = ALF_Panel_DefWindowProc(hwnd, msg, wparam, lparam);
         ALF_InvalidateBackground(hwnd);
+        return rv;
     }
 
     return ALF_Panel_DefWindowProc(hwnd, msg, wparam, lparam);
-- 
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