MidiPlayer: Fix crash when dropping a midi file

Window must be locked or MidiRunThread crashes with a segment violation. Change-Id: I9d5d0fa477475a9b5ba877aea3d6583690aacb2b Reviewed-on: https://review.haiku-os.org/c/1080 Reviewed-by: Barrett17 <[email protected]>
2019-02-25 11:57:46 +00:00
parent 5b88998b2d
commit 65c0d507d3
1 changed files with 8 additions and 7 deletions
@@ -427,17 +427,18 @@ MidiPlayerWindow::_StopHook(int32 arg)
 void
 MidiPlayerWindow::StopHook()
 {
-	Lock();
+	if (Lock()) {
 		// we may be called from the synth's thread

-	fIsPlaying = false;
+		fIsPlaying = false;

-	fScopeView->SetPlaying(false);
-	fScopeView->Invalidate();
-	fPlayButton->SetEnabled(true);
-	fPlayButton->SetLabel(B_TRANSLATE("Play"));
+		fScopeView->SetPlaying(false);
+		fScopeView->Invalidate();
+		fPlayButton->SetEnabled(true);
+		fPlayButton->SetLabel(B_TRANSLATE("Play"));

-	Unlock();
+		Unlock();
+	}
 }