From cd7552ae1ce7f6c92d03b7d0a83fe4aec073aeff Mon Sep 17 00:00:00 2001
From: Jonas Kümmerlin <jonas@kuemmerlin.eu>
Date: Sat, 5 Jan 2019 12:19:03 +0100
Subject: make combobox look better on NT 3.51

still broken on Win32s for whatever reason
---
 alf/alfcombobox.cpp | 36 ++++++++++++++++++++++++++++--------
 1 file changed, 28 insertions(+), 8 deletions(-)

diff --git a/alf/alfcombobox.cpp b/alf/alfcombobox.cpp
index 8afdace..a6e846f 100644
--- a/alf/alfcombobox.cpp
+++ b/alf/alfcombobox.cpp
@@ -24,6 +24,13 @@ ALF__ComboItemHeight(HWND hwnd)
         SelectFont(hDc, oldfont);
     }
 
+    if (LOBYTE(LOWORD(GetVersion())) < 4) {
+            // baseline alignment for NT3.x/Win32s
+            // ideally, this would only be applied for the ODS_COMOBOXEDIT state,
+            // but that state is not sent pre-Win95.
+            height += 2;
+        }
+
     ReleaseDC(hwnd, hDc);
     return height;
 }
@@ -42,9 +49,7 @@ ALF__ComboWindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
 
     if (uMsg == WM_CREATE) {
         ALFComboCreateParams *params = (ALFComboCreateParams*)((CREATESTRUCT*)lParam)->lpCreateParams;
-        DWORD comboStyle = params->comboStyle;
-        if (LOBYTE(LOWORD(GetVersion())) >= 4)
-            comboStyle |= CBS_OWNERDRAWFIXED | CBS_HASSTRINGS;
+        DWORD comboStyle = params->comboStyle | CBS_OWNERDRAWFIXED | CBS_HASSTRINGS;
 
         HWND hwndCombo = CreateWindowEx(0,
                                         TEXT("COMBOBOX"),
@@ -186,6 +191,13 @@ ALF__ComboWindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
             LONG y = lpdis->rcItem.top;
             LONG x = lpdis->rcItem.left;
 
+            if (LOBYTE(LOWORD(GetVersion())) < 4) {
+                // baseline alignment for NT3.x/Win32s
+                // ideally, this would only be applied for the ODS_COMOBOXEDIT state,
+                // but that state is not sent pre-Win95.
+                y += 1;
+            }
+
             // add left padding like an edit control
             TEXTMETRIC tm;
             ZeroMemory(&tm, sizeof(tm));
@@ -233,13 +245,21 @@ ALF__ComboWindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
             SetWindowPos(hwndChild, NULL, 0, 1, pos->cx, 200, SWP_NOZORDER|SWP_NOACTIVATE|SWP_NOCOPYBITS);
             SendMessage(hwndChild, CB_SETEDITSEL, 0, (LPARAM)sel);
 
+            DWORD heightOffset = 0;
             if (LOBYTE(LOWORD(GetVersion())) >= 4) {
-                SendMessage(hwndChild, CB_SETITEMHEIGHT, (WPARAM)-1, pos->cy - 8);
-
-                int h = ALF__ComboItemHeight(hwnd);
-                if (h)
-                    SendMessage(hwndChild, CB_SETITEMHEIGHT, (WPARAM)0, h);
+                heightOffset = - 2*app->compatFn->GetSystemMetricsForDpi(
+                            SM_CYEDGE, ALF_CentipointsToPixels(GetParent(hwnd), 7200))
+                            - 4;
+            } else {
+                heightOffset = -2;
             }
+
+            SendMessage(hwndChild, CB_SETITEMHEIGHT, (WPARAM)-1, pos->cy + heightOffset);
+
+            int h = ALF__ComboItemHeight(hwnd);
+            if (h)
+                SendMessage(hwndChild, CB_SETITEMHEIGHT, (WPARAM)0, h);
+
         }
     }
 
-- 
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