Initial commit

Lts/Common/LtsScriptTimeline/track_drag_handler.cpp

@@ -0,0 +1,183 @@
+#include "track_drag_handler.h"
+
+#include "track_content_widget.h"
+#include "track_entry.h"
+#include "tools.h"
+
+#include "track_widget.h"
+#include "script_timeline.h"
+
+#include <LtsWidgets/lts_message_dialog.h>
+
+#include <QDragEnterEvent>
+#include <QDropEvent>
+#include <QDrag>
+#include <QMimeData>
+#include <QGuiApplication>
+#include <QApplication>
+
+#include <QDebug>
+
+
+namespace LtsScriptTimeline
+{
+
+void DragHandler::dragEnterEvent(QDragEnterEvent *event)
+{
+  if (m_tcw->isMultiLineMultiSelectionMode()) // in multiline selection mode, ignore enter events from other tracks
+  {
+    if (event->source() != m_tcw)
+    {
+      event->ignore();
+      return;
+    }
+    else
+    {
+      for (const auto &tcw : qAsConst(m_tcwCorresponding))
+        tcw->dragEnter(tcw->selectedItemsToData(tcw->m_tools->getTime(m_dragStartPos.x())));
+    }
+  }
+
+  m_tcw->dragEnd();
+
+  if (!event->mimeData()->hasFormat(TrackContentWidget::mime))
+    return;
+
+  if (m_tcw->dragEnter(event->mimeData()->data(TrackContentWidget::mime)))
+    event->acceptProposedAction();
+}
+
+
+void DragHandler::dragLeaveEvent(QDragLeaveEvent *event)
+{
+  if (m_tcw->isMultiLineMultiSelectionMode())
+  {
+    event->ignore();
+    for (const auto &tcw : qAsConst(m_tcwCorresponding))
+      tcw->dragEnd();
+  }
+
+  m_tcw->dragEnd();
+}
+
+
+void DragHandler::dropEvent(QDropEvent *event)
+{
+  int dropPos = event->pos().x();
+  int dropTime = m_tcw->m_tools->getTime(dropPos, m_tcw->m_isFilter) - m_tcw->m_dragOffsetTime;
+
+  /*
+   * If set, check other track content widget for collisions to avoid parallel topics of same type,
+   * since not all topics can be played on both screens at the same time.
+   */
+  for (const auto &tcw : qAsConst(m_tcwCorresponding))
+  {
+    bool hasParallelTopicsOfSameType = TrackContentWidget::checkForParallelTopics(tcw, m_tcw->m_preview, dropTime);
+
+    if (hasParallelTopicsOfSameType)
+    {
+      new LtsWidgets::LtsMessageDialogNew(m_tcw, TrackContentWidget::parallelError(), QObject::tr("Error"));
+      break;
+    }
+  }
+
+  if (m_tcw->dragDrop(dropPos))
+    event->acceptProposedAction();
+  else
+    emit m_tcw->signalMultiLineMultiSelectionDone(0);
+}
+
+
+void DragHandler::dragMoveEvent(QDragMoveEvent *event)
+{
+  int pos = event->pos().x();
+
+  if (m_tcw->dragMove(pos))
+    event->acceptProposedAction();
+
+  // only called from the master
+  if (m_tcw->isMultiLineMultiSelectionMode())
+    emit m_tcw->signalMultiLineMultiSelectionMove(pos);
+}
+
+
+void DragHandler::mousePressEvent(QMouseEvent *event)
+{
+  if (event->buttons() != Qt::LeftButton)
+    return;
+  m_dragStartPos = event->pos();
+}
+
+
+void DragHandler::mouseMoveEvent(QMouseEvent *event) // before a drag is started - drag is started here
+{
+  if (event->buttons() != Qt::LeftButton)
+    return;
+
+  QPoint cursorPos = m_tcw->mapFromGlobal(event->globalPos());
+
+  // check if it's a drag *pun unintended*
+  if (!m_tcw->m_mainSelected /* only allow drag if there was ANY te under the cursor */
+      || ((cursorPos - m_dragStartPos).manhattanLength() < QApplication::startDragDistance()
+          && (m_dragStartPos - cursorPos).manhattanLength() < QApplication::startDragDistance()))
+    return;
+
+  QVector<TrackEntry *> selected = m_tcw->getSelectedEntries();
+
+  if (selected.isEmpty())
+    return;
+
+  int cursorPosTime = m_tcw->m_tools->getTime(m_dragStartPos.x());
+
+  QMimeData *mimeData = new QMimeData();
+  mimeData->setData(TrackContentWidget::mime, m_tcw->selectedItemsToData(cursorPosTime));
+
+  QDrag *drag = new QDrag(m_tcw);
+  drag->setMimeData(mimeData);
+
+  if (m_tcw->isMultiLineMultiSelectionMode())
+    emit m_tcw->signalMultiLineMultiSelectionStart(cursorPosTime);
+
+  QVector<TrackEntry *> selectedOld = m_tcw->m_selected; // copy list, only delete OLD selection [NOTE: m_selected has to be fetched BEFORE exec(), otherwise m_select has changed (due to new / moved TEs!)
+
+  if (drag->exec(Qt::MoveAction) == Qt::MoveAction)
+  {
+    if (!m_tcw->isMultiLineMultiSelectionMode())
+    {
+      // move action - TEs were moved
+      for (auto i = selectedOld.begin(); i != selectedOld.end(); ++i)
+        emit m_tcw->signalTrackEntryDeleted((*i)->m_topicId); // triggers the deletion of old filters
+      qDeleteAll(selectedOld);
+    }
+  }
+  else // user pressed escape while dragging
+  {
+    emit m_tcw->signalMultiLineMultiSelectionDone(-1);
+  }
+}
+
+
+void DragHandler::keyPressEvent(QKeyEvent *event)
+{
+  switch (event->key())
+  {
+    case Qt::Key_Left:
+    {
+      emit m_tcw->signalMoveAll(-1);
+      break;
+    }
+
+    case Qt::Key_Right:
+    {
+      emit m_tcw->signalMoveAll(1);
+      break;
+    }
+
+    default:
+    {
+      break;
+    }
+  }
+}
+
+} // namespace LtsScriptTimeline