More encapsulation and add new class Signal for handling custom events.

src/GUI/Trash.hpp

@@ -0,0 +1,40 @@
+#pragma once
+
+#include <wx/button.h>
+#include <wx/dataview.h>
+#include <wx/panel.h>
+#include <wx/sizer.h>
+#include <wx/treebase.h>
+#include <wx/treectrl.h>
+#include <wx/window.h>
+
+class cTrashPanel : public wxPanel
+{
+    public:
+        cTrashPanel(wxWindow* window, wxDataViewListCtrl& listCtrl);
+        ~cTrashPanel();
+
+    public:
+        wxTreeCtrl* GetTrashObject() { return m_pTrash; }
+        wxTreeItemId GetTrashRoot() { return m_TrashRoot; }
+
+    private:
+        // -------------------------------------------------------------------
+        // TrashPane event handlers
+        void OnShowTrashContextMenu(wxTreeEvent& event);
+        void OnClickRestoreTrashItem(wxCommandEvent& event);
+        void OnDragAndDropToTrash(wxDropFilesEvent& event);
+
+    private:
+        wxTreeItemId m_TrashRoot;
+        wxTreeCtrl* m_pTrash = nullptr;
+        wxButton* m_pRestoreTrashedItemButton = nullptr;
+        wxBoxSizer* m_pMainSizer = nullptr;
+        wxBoxSizer* m_pTrashSizer = nullptr;
+        wxBoxSizer* m_pButtonSizer = nullptr;
+
+    private:
+        wxWindow* m_pWindow = nullptr;
+        wxDataViewListCtrl& m_ListCtrl;
+        // friend class cListCtrl;
+};