added gap node and block improvements

app/node/block/gap/CMakeLists.txt

@@ -0,0 +1,22 @@
+# 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/>.
+
+set(OLIVE_SOURCES
+  ${OLIVE_SOURCES}
+  node/block/gap/gap.h
+  node/block/gap/gap.cpp
+  PARENT_SCOPE
+)

app/node/block/gap/gap.cpp

@@ -0,0 +1,17 @@
+#include "gap.h"
+
+GapBlock::GapBlock()
+{
+}
+
+rational GapBlock::length()
+{
+  return length_;
+}
+
+void GapBlock::set_length(const rational &length)
+{
+  length_ = length;
+
+  RefreshSurrounds();
+}

app/node/block/gap/gap.h

@@ -0,0 +1,41 @@
+/***
+
+  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 TIMELINEBLOCK_H
+#define TIMELINEBLOCK_H
+
+#include "node/block/block.h"
+
+/**
+ * @brief Node that represents the end of the Timeline as well as a time traversal Node
+ */
+class GapBlock : public Block
+{
+public:
+  GapBlock();
+
+  virtual rational length() override;
+  virtual void set_length(const rational &length) override;
+
+private:
+  rational length_;
+};
+
+#endif // TIMELINEBLOCK_H