Add WBaseWidget, a base class for holding logic common to all Mixxx widgets.

Since this class does not inherit QWidget, widget classes can inherit from a
QWidget descendent and also inherit from WBaseWidget without causing
multiple-inheritance diamond issues. This was a regular issue with WWidget.

1 files changed, 3 insertions, 1 deletions

diff --git a/src/widget/wlibrarysidebar.cpp b/src/widget/wlibrarysidebar.cpp
index d3e3d0655d..4632206002 100644
--- a/src/widget/wlibrarysidebar.cpp
+++ b/src/widget/wlibrarysidebar.cpp
@@ -9,7 +9,9 @@
 
 const int expand_time = 250;
 
-WLibrarySidebar::WLibrarySidebar(QWidget* parent) : QTreeView(parent) {
+WLibrarySidebar::WLibrarySidebar(QWidget* parent)
+        : QTreeView(parent),
+          WBaseWidget(this) {
     //Set some properties
     setHeaderHidden(true);
     setSelectionMode(QAbstractItemView::SingleSelection);