On mouse down in thumb, issue SB_THUMBTRACK with current position.

On mouse up in thumb, issue SB_THUMBPOSITION followed by SB_ENDSCROLL.

On mouse down in thumb, issue SB_THUMBTRACK with current position.
ff42c017 · Duane Clark · Alexandre Julliard · 1d8d0171 · ff42c017
Commit ff42c017 authored Aug 03, 2002 by Duane Clark Committed by Alexandre Julliard Aug 03, 2002
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Showing with 12 additions and 1 deletion

scroll.c controls/scroll.c +12 -1

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--- a/controls/scroll.c
+++ b/controls/scroll.c
@@ -1102,6 +1102,18 @@ static void SCROLL_HandleScrollEvent( HWND hwnd, INT nBar, UINT msg, POINT pt)
        break;
    }

+    if (msg == WM_LBUTTONDOWN)
+    {
+
+        if (hittest == SCROLL_THUMB)
+        {
+            UINT val = SCROLL_GetThumbVal( infoPtr, &rect, vertical,
+                                 trackThumbPos + lastMousePos - lastClickPos );
+            SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
+                            MAKEWPARAM( SB_THUMBTRACK, val ), (LPARAM)hwndCtl );
+        }
+    }
+
    if (msg == WM_LBUTTONUP)
    {
 	hittest = SCROLL_trackHitTest;
@@ -1114,7 +1126,6 @@ static void SCROLL_HandleScrollEvent( HWND hwnd, INT nBar, UINT msg, POINT pt)
            SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
                            MAKEWPARAM( SB_THUMBPOSITION, val ), (LPARAM)hwndCtl );
        }
-        else
        SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
                          SB_ENDSCROLL, (LPARAM)hwndCtl );
    }