various: created derived class for widget derivations of

TimelineScaledObject

Minor code cleanup, faster than deriving both QWidget and
TimelineScaledObject each time.

app/widget/timebased/timebased.cpp

@@ -8,7 +8,7 @@
 #include "widget/timelinewidget/undo/undo.h"
 
 TimeBasedWidget::TimeBasedWidget(bool ruler_text_visible, bool ruler_cache_status_visible, QWidget *parent) :
-  QWidget(parent),
+  TimelineScaledWidget(parent),
   viewer_node_(nullptr),
   auto_max_scrollbar_(false),
   points_(nullptr)

app/widget/timebased/timebased.h

@@ -9,7 +9,7 @@
 #include "widget/timelinewidget/timelinescaledobject.h"
 #include "widget/timeruler/timeruler.h"
 
-class TimeBasedWidget : public QWidget, public TimelineScaledObject
+class TimeBasedWidget : public TimelineScaledWidget
 {
   Q_OBJECT
 public:

app/widget/timelinewidget/timelinescaledobject.cpp

@@ -77,3 +77,8 @@ void TimelineScaledObject::SetScale(const double& scale)
 
   ScaleChangedEvent(scale_);
 }
+
+TimelineScaledWidget::TimelineScaledWidget(QWidget *parent) :
+  QWidget(parent)
+{
+}

app/widget/timelinewidget/timelinescaledobject.h

@@ -1,6 +1,8 @@
 #ifndef TIMELINESCALEDOBJECT_H
 #define TIMELINESCALEDOBJECT_H
 
+#include <QWidget>
+
 #include "common/rational.h"
 
 class TimelineScaledObject
@@ -41,4 +43,10 @@ private:
 
 };
 
+class TimelineScaledWidget : public QWidget, public TimelineScaledObject
+{
+public:
+  TimelineScaledWidget(QWidget* parent = nullptr);
+};
+
 #endif // TIMELINESCALEDOBJECT_H

app/widget/timeruler/timeruler.cpp

@@ -31,7 +31,7 @@
 #include "core.h"
 
 TimeRuler::TimeRuler(bool text_visible, bool cache_status_visible, QWidget* parent) :
-  QWidget(parent),
+  TimelineScaledWidget(parent),
   scroll_(0),
   text_visible_(text_visible),
   centered_text_(true),

app/widget/timeruler/timeruler.h

@@ -30,7 +30,7 @@
 #include "widget/timelinewidget/timelinescaledobject.h"
 #include "widget/timelinewidget/view/timelineplayhead.h"
 
-class TimeRuler : public QWidget, public TimelineScaledObject
+class TimeRuler : public TimelineScaledWidget
 {
   Q_OBJECT
 public: