moved timeline interactivity to separate classes

app/widget/timelineview/tool/pointer.cpp

@@ -0,0 +1,109 @@
+/***
+
+  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 "widget/timelineview/timelineview.h"
+
+TimelineView::PointerTool::PointerTool(TimelineView *parent) :
+  Tool(parent)
+{
+}
+
+void FlipControlAndShiftModifiers(QMouseEvent* e) {
+  if (e->modifiers() & Qt::ControlModifier & Qt::ShiftModifier) {
+    return;
+  }
+
+  if (e->modifiers() & Qt::ShiftModifier) {
+    e->setModifiers((e->modifiers() | Qt::ControlModifier) & ~Qt::ShiftModifier);
+  } else if (e->modifiers() & Qt::ControlModifier) {
+    e->setModifiers((e->modifiers() | Qt::ShiftModifier) & ~Qt::ControlModifier);
+  }
+}
+
+void TimelineView::PointerTool::MousePress(QMouseEvent *event)
+{
+  FlipControlAndShiftModifiers(event);
+
+  parent()->QGraphicsView::mousePressEvent(event);
+}
+
+void TimelineView::PointerTool::MouseMove(QMouseEvent *event)
+{
+  FlipControlAndShiftModifiers(event);
+
+  parent()->QGraphicsView::mouseMoveEvent(event);
+
+  if (!parent()->dragging_) {
+    // Let's see if there's anything selected to drag
+    if (parent()->itemAt(event->pos()) != nullptr) {
+      QList<QGraphicsItem*> selected_items = parent()->scene_.selectedItems();
+
+      foreach (QGraphicsItem* item, selected_items) {
+        TimelineViewGhostItem* ghost = new TimelineViewGhostItem();
+        TimelineViewClipItem* clip_item = static_cast<TimelineViewClipItem*>(item);
+
+        ClipBlock* clip = clip_item->clip();
+
+        ghost->SetIn(clip->in());
+        ghost->SetOut(clip->out());
+        ghost->SetScale(parent()->scale_);
+
+        ghost->setPos(clip_item->pos());
+
+        parent()->ghost_items_.append(ghost);
+
+        parent()->scene_.addItem(ghost);
+      }
+
+      parent()->drag_start_ = event->pos();
+    }
+
+    parent()->dragging_ = true;
+  } else if (!parent()->ghost_items_.isEmpty()) {
+    QPoint movement = event->pos() - parent()->drag_start_;
+
+    rational time_movement = parent()->ScreenToTime(movement.x());
+
+    // Validate movement
+    foreach (TimelineViewGhostItem* ghost, parent()->ghost_items_) {
+      rational validator = ghost->In() + time_movement;
+      if (validator < 0) {
+        time_movement = rational(0) - ghost->In();
+      }
+    }
+
+    // Perform movement
+    foreach (TimelineViewGhostItem* ghost, parent()->ghost_items_) {
+      ghost->SetInAdjustment(time_movement);
+      ghost->SetOutAdjustment(time_movement);
+    }
+  }
+}
+
+void TimelineView::PointerTool::MouseRelease(QMouseEvent *event)
+{
+  FlipControlAndShiftModifiers(event);
+
+  parent()->QGraphicsView::mouseReleaseEvent(event);
+
+  parent()->ClearGhosts();
+
+  parent()->dragging_ = false;
+}