From 8c59f665835409cb66f9b18a15e2d22f84627d24 Mon Sep 17 00:00:00 2001
From: Paul Licameli <paul.licameli@audacityteam.org>
Date: Fri, 5 Jul 2019 13:21:26 -0400
Subject: [PATCH] ScrubbingToolBar eats less idle time after commit 192530d

---
 src/toolbars/ScrubbingToolBar.cpp |  2 --
 src/widgets/AButton.cpp           | 14 +++++++++-----
 2 files changed, 9 insertions(+), 7 deletions(-)

diff --git a/src/toolbars/ScrubbingToolBar.cpp b/src/toolbars/ScrubbingToolBar.cpp
index 4fe092ec7..bca717598 100644
--- a/src/toolbars/ScrubbingToolBar.cpp
+++ b/src/toolbars/ScrubbingToolBar.cpp
@@ -219,9 +219,7 @@ void ScrubbingToolBar::OnButton(wxCommandEvent &event)
 void ScrubbingToolBar::EnableDisableButtons()
 {
    const auto scrubButton = mButtons[STBScrubID];
-   scrubButton->SetEnabled(true);
    const auto seekButton = mButtons[STBSeekID];
-   seekButton->SetEnabled(true);
 
    AudacityProject *p = &mProject;
 
diff --git a/src/widgets/AButton.cpp b/src/widgets/AButton.cpp
index 197077c05..4463c89b5 100644
--- a/src/widgets/AButton.cpp
+++ b/src/widgets/AButton.cpp
@@ -575,9 +575,11 @@ bool AButton::WasControlDown()
 
 void AButton::Enable()
 {
-   wxWindow::Enable(true);
-   mEnabled = true;
-   Refresh(false);
+   bool changed = wxWindow::Enable(true);
+   if ( !mEnabled ) {
+      mEnabled = true;
+      Refresh(false);
+   }
 }
 
 void AButton::Disable()
@@ -589,10 +591,12 @@ void AButton::Disable()
 #ifndef __WXMSW__
    wxWindow::Enable(false);
 #endif
-   mEnabled = false;
    if (GetCapture()==this)
       ReleaseMouse();
-   Refresh(false);
+   if ( mEnabled ) {
+      mEnabled = false;
+      Refresh(false);
+   }
 }
 
 void AButton::PushDown()