[reactos] 01/01: [SNDVOL32] Disable the balance trackbar for mono channels.

[Eric Kohl]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=45f0d7413c1eec69fe672…

commit 45f0d7413c1eec69fe6728fcd26acc561d93f46f
Author:     Eric Kohl <eric.kohl(a)reactos.org>
AuthorDate: Mon Feb 11 21:16:32 2019 +0100
Commit:     Eric Kohl <eric.kohl(a)reactos.org>
CommitDate: Mon Feb 11 21:16:32 2019 +0100

    [SNDVOL32] Disable the balance trackbar for mono channels.
    
    CORE-15743
---
 base/applications/sndvol32/dialog.c | 37 ++++++++++++++++++++++++++-----------
 1 file changed, 26 insertions(+), 11 deletions(-)

diff --git a/base/applications/sndvol32/dialog.c b/base/applications/sndvol32/dialog.c
index 8ff9a490b4..a93a638034 100644
--- a/base/applications/sndvol32/dialog.c
+++ b/base/applications/sndvol32/dialog.c
@@ -562,21 +562,36 @@ EnumConnectionsCallback(
                                   }
                               }
 
-                              /* Set the balance trackbar */
-                              wID = (PrefContext->Count + 1) * IDC_LINE_SLIDER_HORZ;
-
-                              /* get dialog control */
-                              hDlgCtrl = GetDlgItem(PrefContext->MixerWindow->hWnd,
wID);
+                              if (Line->cChannels == 1)
+                              {
+                                  /* Disable the balance trackbar for mono channels */
+                                  wID = (PrefContext->Count + 1) *
IDC_LINE_SLIDER_HORZ;
 
-                              if (hDlgCtrl != NULL)
+                                  /* get dialog control */
+                                  hDlgCtrl =
GetDlgItem(PrefContext->MixerWindow->hWnd, wID);
+                                  if (hDlgCtrl != NULL)
+                                  {
+                                      EnableWindow(hDlgCtrl, FALSE);
+                                  }
+                              }
+                              else if (Line->cChannels == 2)
                               {
-                                  /* check state */
-                                  LRESULT OldPosition = SendMessageW(hDlgCtrl,
TBM_GETPOS, 0, 0);
+                                  /* Set the balance trackbar */
+                                  wID = (PrefContext->Count + 1) *
IDC_LINE_SLIDER_HORZ;
+
+                                  /* get dialog control */
+                                  hDlgCtrl =
GetDlgItem(PrefContext->MixerWindow->hWnd, wID);
 
-                                  if (OldPosition != balancePosition)
+                                  if (hDlgCtrl != NULL)
                                   {
-                                      /* update control state */
-                                      SendMessageW(hDlgCtrl, TBM_SETPOS, (WPARAM)TRUE,
balancePosition);
+                                      /* check state */
+                                      LRESULT OldPosition = SendMessageW(hDlgCtrl,
TBM_GETPOS, 0, 0);
+
+                                      if (OldPosition != balancePosition)
+                                      {
+                                          /* update control state */
+                                          SendMessageW(hDlgCtrl, TBM_SETPOS,
(WPARAM)TRUE, balancePosition);
+                                      }
                                   }
                               }
                           }