Move wxQtTreeItemEditorFactory to its own header

include/wx/qt/private/treeitemfactory.h

@@ -0,0 +1,100 @@
+#ifndef _WX_TREEITEM_FACTORY_H_
+#define _WX_TREEITEM_FACTORY_H_
+
+#include <QtWidgets/QItemEditorFactory>
+
+#include "wx/recguard.h"
+#include "wx/textctrl.h"
+
+// wxQT Doesn't have a mechanism for "adopting" external widgets so we have to
+// create an instance of wxTextCtrl rather than adopting the control QT would
+// create.
+//
+// Unfortunately the factory is given an internal widget as the parent for
+// editor.
+//
+// To work around these issues we create a wxTextCtl parented by the wxListCtrl
+// then recalculate its position relative to the internal widget.
+class wxQtListTextCtrl : public wxTextCtrl
+{
+public:
+    wxQtListTextCtrl(wxWindow* parent, QWidget* actualParent)
+        : wxTextCtrl(parent, wxID_ANY, wxEmptyString,
+            wxDefaultPosition, wxDefaultSize,
+            wxNO_BORDER),
+        m_actualParent(actualParent),
+        m_moving(0)
+    {
+
+        Bind(wxEVT_MOVE, &wxQtListTextCtrl::onMove, this);
+    }
+
+    void onMove(wxMoveEvent &event)
+    {
+        // QWidget::move generates a QMoveEvent so we need to guard against
+        // reentrant calls.
+        wxRecursionGuard guard(m_moving);
+        if (guard.IsInside())
+        {
+            event.Skip();
+            return;
+        }
+
+        const QPoint eventPosition = wxQtConvertPoint(event.GetPosition());
+        const QPoint globalPosition = m_actualParent->mapToGlobal(eventPosition);
+
+        // For some reason this always gives us the offset from the header info
+        // the internal control. So we need to treat this as an offset rather
+        // than a position.
+        QWidget* widget = GetHandle();
+        const QPoint offset = widget->mapFromGlobal(globalPosition);
+
+        widget->move(eventPosition + offset);
+    }
+
+private:
+    QWidget* m_actualParent;
+    wxRecursionGuardFlag m_moving;
+
+    wxDECLARE_NO_COPY_CLASS(wxQtListTextCtrl);
+};
+
+// QT doesn't give us direct access to the editor within the QTreeWidget.
+// Instead, we'll supply a factory to create the widget for QT and keep track
+// of it ourselves.
+class wxQtTreeItemEditorFactory : public QItemEditorFactory
+{
+public:
+    explicit wxQtTreeItemEditorFactory(wxWindow* parent)
+        : m_parent(parent),
+        m_textCtrl(NULL)
+    {
+    }
+
+    QWidget* createEditor(int WXUNUSED(userType), QWidget* parent) const wxOVERRIDE
+    {
+        m_textCtrl = new wxQtListTextCtrl(m_parent, parent);
+        m_textCtrl->SetFocus();
+        return m_textCtrl->GetHandle();
+    }
+
+    wxTextCtrl* GetEditControl()
+    {
+        return m_textCtrl;
+    }
+
+    void ClearEditor()
+    {
+        delete m_textCtrl;
+        m_textCtrl = NULL;
+    }
+
+private:
+    wxWindow* m_parent;
+    mutable wxTextCtrl* m_textCtrl;
+
+    wxDECLARE_NO_COPY_CLASS(wxQtTreeItemEditorFactory);
+};
+
+#endif //_WX_TREEITEM_FACTORY_H_
+