moved some files around for better organization

app/widget/handmovableview/CMakeLists.txt

@@ -0,0 +1,22 @@
+# Olive - Non-Linear Video Editor
+# Copyright (C) 2020 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}
+  widget/handmovableview/handmovableview.h
+  widget/handmovableview/handmovableview.cpp
+  PARENT_SCOPE
+)

app/widget/handmovableview/handmovableview.cpp

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+/***
+
+  Olive - Non-Linear Video Editor
+  Copyright (C) 2020 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 "handmovableview.h"
+
+#include <QMouseEvent>
+
+#include "core.h"
+
+namespace olive {
+
+HandMovableView::HandMovableView(QWidget* parent) :
+  QGraphicsView(parent),
+  dragging_hand_(false)
+{
+  connect(Core::instance(), &Core::ToolChanged, this, &HandMovableView::ApplicationToolChanged);
+}
+
+void HandMovableView::ApplicationToolChanged(Tool::Item tool)
+{
+  if (tool == Tool::kHand) {
+    setDragMode(ScrollHandDrag);
+  } else {
+    setDragMode(default_drag_mode_);
+  }
+
+  ToolChangedEvent(tool);
+}
+
+bool HandMovableView::HandPress(QMouseEvent *event)
+{
+  if (event->button() == Qt::MiddleButton) {
+    pre_hand_drag_mode_ = dragMode();
+    dragging_hand_ = true;
+
+    setDragMode(ScrollHandDrag);
+
+    // Transform mouse event to act like the left button is pressed
+    QMouseEvent transformed(event->type(),
+                            event->localPos(),
+                            Qt::LeftButton,
+                            Qt::LeftButton,
+                            event->modifiers());
+
+    QGraphicsView::mousePressEvent(&transformed);
+
+    return true;
+  }
+
+  return false;
+}
+
+bool HandMovableView::HandMove(QMouseEvent *event)
+{
+  if (dragging_hand_) {
+    // Transform mouse event to act like the left button is pressed
+    QMouseEvent transformed(event->type(),
+                            event->localPos(),
+                            Qt::LeftButton,
+                            Qt::LeftButton,
+                            event->modifiers());
+
+    QGraphicsView::mouseMoveEvent(&transformed);
+  }
+  return dragging_hand_;
+}
+
+bool HandMovableView::HandRelease(QMouseEvent *event)
+{
+  if (dragging_hand_) {
+    // Transform mouse event to act like the left button is pressed
+    QMouseEvent transformed(event->type(),
+                            event->localPos(),
+                            Qt::LeftButton,
+                            Qt::LeftButton,
+                            event->modifiers());
+
+    QGraphicsView::mouseReleaseEvent(&transformed);
+
+    setDragMode(pre_hand_drag_mode_);
+
+    dragging_hand_ = false;
+
+    return true;
+  }
+
+  return false;
+}
+
+void HandMovableView::SetDefaultDragMode(QGraphicsView::DragMode mode)
+{
+  default_drag_mode_ = mode;
+  setDragMode(default_drag_mode_);
+}
+
+const QGraphicsView::DragMode &HandMovableView::GetDefaultDragMode() const
+{
+  return default_drag_mode_;
+}
+
+}

app/widget/handmovableview/handmovableview.h

@@ -0,0 +1,59 @@
+/***
+
+  Olive - Non-Linear Video Editor
+  Copyright (C) 2020 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 HANDMOVABLEVIEW_H
+#define HANDMOVABLEVIEW_H
+
+#include <QGraphicsView>
+
+#include "tool/tool.h"
+
+namespace olive {
+
+class HandMovableView : public QGraphicsView
+{
+  Q_OBJECT
+public:
+  HandMovableView(QWidget* parent = nullptr);
+
+protected:
+  virtual void ToolChangedEvent(Tool::Item tool){Q_UNUSED(tool)}
+
+  bool HandPress(QMouseEvent* event);
+  bool HandMove(QMouseEvent* event);
+  bool HandRelease(QMouseEvent* event);
+
+  void SetDefaultDragMode(DragMode mode);
+  const DragMode& GetDefaultDragMode() const;
+
+private:
+  bool dragging_hand_;
+  DragMode pre_hand_drag_mode_;
+
+  DragMode default_drag_mode_;
+
+private slots:
+  void ApplicationToolChanged(Tool::Item tool);
+
+};
+
+}
+
+#endif // HANDMOVABLEVIEW_H