From 554e9dbab9f8b0667920b67b42fe3c13abbac19f Mon Sep 17 00:00:00 2001
From: FunkyFr3sh <cc.red.alert.1@googlemail.com>
Date: Thu, 11 Feb 2021 00:50:09 +0100
Subject: [PATCH] "maximize" on titlebar double click

---
 src/wndproc.c | 35 ++++++++++++++++++++++++++++++++++-
 1 file changed, 34 insertions(+), 1 deletion(-)

diff --git a/src/wndproc.c b/src/wndproc.c
index da11f60..ff5818a 100644
--- a/src/wndproc.c
+++ b/src/wndproc.c
@@ -473,7 +473,40 @@ LRESULT CALLBACK fake_WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam
         }
         case WM_NCLBUTTONDBLCLK:
         {
-            util_toggle_fullscreen();
+            if (g_ddraw->resizable)
+            {
+                RECT work_rc;
+                RECT client_rc;
+
+                if (real_GetClientRect(g_ddraw->hwnd, &client_rc) && 
+                    SystemParametersInfo(SPI_GETWORKAREA, 0, &work_rc, 0))
+                {
+                    if (client_rc.right != g_ddraw->width || client_rc.bottom != g_ddraw->height)
+                    {
+                        util_set_window_rect(
+                            (work_rc.right / 2) - (g_ddraw->width / 2),
+                            (work_rc.bottom / 2) - (g_ddraw->height / 2),
+                            g_ddraw->width, 
+                            g_ddraw->height, 
+                            0);
+                    }
+                    else if (
+                        util_unadjust_window_rect(
+                            &work_rc, 
+                            GetWindowLong(g_ddraw->hwnd, GWL_STYLE), 
+                            FALSE, 
+                            GetWindowLong(g_ddraw->hwnd, GWL_EXSTYLE)))
+                    {
+                        util_set_window_rect(
+                            work_rc.left, 
+                            work_rc.top, 
+                            work_rc.right - work_rc.left, 
+                            work_rc.bottom - work_rc.top, 
+                            0);
+                    }
+                }
+            }
+
             return 0;
         }
         case WM_SYSKEYDOWN: