various: encapsulate all code in the olive namespace to avoid name collisions

Large-scale code cleanup. Also adds a license to the top of all files that were
missing it.

app/widget/timeruler/seekablewidget.cpp

@@ -1,3 +1,23 @@
+/***
+
+  Olive - Non-Linear Video Editor
+  Copyright (C) 2019 Olive Team
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+***/
+
 #include "seekablewidget.h"
 
 #include <QMouseEvent>
@@ -6,6 +26,8 @@
 
 #include "common/qtutils.h"
 
+OLIVE_NAMESPACE_ENTER
+
 SeekableWidget::SeekableWidget(QWidget* parent) :
   TimelineScaledWidget(parent),
   time_(0),
@@ -199,3 +221,5 @@ void SeekableWidget::DrawPlayhead(QPainter *p, int x, int y)
 
   p->setRenderHint(QPainter::Antialiasing, false);
 }
+
+OLIVE_NAMESPACE_EXIT

app/widget/timeruler/seekablewidget.h

@@ -1,3 +1,23 @@
+/***
+
+  Olive - Non-Linear Video Editor
+  Copyright (C) 2019 Olive Team
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+***/
+
 #ifndef SEEKABLEWIDGET_H
 #define SEEKABLEWIDGET_H
 
@@ -6,6 +26,8 @@
 #include "widget/timelinewidget/view/timelineplayhead.h"
 #include "widget/timelinewidget/timelinescaledobject.h"
 
+OLIVE_NAMESPACE_ENTER
+
 class SeekableWidget : public TimelineScaledWidget
 {
   Q_OBJECT
@@ -85,4 +107,6 @@ private:
 
 };
 
+OLIVE_NAMESPACE_EXIT
+
 #endif // SEEKABLEWIDGET_H

app/widget/timeruler/timeruler.cpp

@@ -28,6 +28,8 @@
 #include "config/config.h"
 #include "core.h"
 
+OLIVE_NAMESPACE_ENTER
+
 TimeRuler::TimeRuler(bool text_visible, bool cache_status_visible, QWidget* parent) :
   SeekableWidget(parent),
   text_visible_(text_visible),
@@ -312,3 +314,5 @@ void TimeRuler::UpdateHeight()
 
   setFixedHeight(height);
 }
+
+OLIVE_NAMESPACE_EXIT

app/widget/timeruler/timeruler.h

@@ -27,6 +27,8 @@
 #include "common/timerange.h"
 #include "seekablewidget.h"
 
+OLIVE_NAMESPACE_ENTER
+
 class TimeRuler : public SeekableWidget
 {
   Q_OBJECT
@@ -70,4 +72,6 @@ private:
 
 };
 
+OLIVE_NAMESPACE_EXIT
+
 #endif // TIMERULER_H