Implement Qml drag and drop

src/ui/NhekoDropArea.cpp

@@ -0,0 +1,39 @@
+#include "NhekoDropArea.h"
+
+#include <QMimeData>
+
+#include "ChatPage.h"
+#include "timeline/InputBar.h"
+#include "timeline/TimelineModel.h"
+#include "timeline/TimelineViewManager.h"
+
+#include "Logging.h"
+
+NhekoDropArea::NhekoDropArea(QQuickItem *parent)
+  : QQuickItem(parent)
+{
+        setFlags(ItemAcceptsDrops);
+}
+
+void
+NhekoDropArea::dragEnterEvent(QDragEnterEvent *event)
+{
+        event->acceptProposedAction();
+}
+
+void
+NhekoDropArea::dragMoveEvent(QDragMoveEvent *event)
+{
+        event->acceptProposedAction();
+}
+
+void
+NhekoDropArea::dropEvent(QDropEvent *event)
+{
+        if (event) {
+                auto model = ChatPage::instance()->timelineManager()->getHistoryView(roomid_);
+                if (model) {
+                        model->input()->insertMimeData(event->mimeData());
+                }
+        }
+}