implement file browser dialog

engine/app_dialogs.cpp

@@ -1,6 +1,7 @@
 #include "pch.h"
 #include "app.h"
 #include "node_dialog_open.h"
+#include "node_dialog_browse.h"
 
 void App::dialog_newdoc()
 {
@@ -75,6 +76,37 @@ void App::dialog_open()
     }
 }
 
+void App::dialog_browse()
+{
+    if (canvas)
+    {
+        // load thumbnail test
+        auto dialog = std::make_shared<NodeDialogBrowse>();
+        dialog->m_manager = &layout;
+        dialog->data_path = data_path;
+        dialog->init();
+        dialog->create();
+        dialog->loaded();
+
+        layout[main_id]->add_child(dialog);
+        layout[main_id]->update();
+
+        dialog->btn_ok->on_click = [this, dialog](Node*)
+        {
+            canvas->reset_camera();
+            layers->clear();
+            canvas->m_canvas->project_open(dialog->selected_path);
+            doc_name = dialog->selected_name;
+            if (auto docname = layout[main_id]->find<NodeText>("txt-docname"))
+                docname->set_text(("Panodoc: " + doc_name).c_str());
+            for (auto& i : canvas->m_canvas->m_order)
+                layers->add_layer(canvas->m_canvas->m_layers[i].m_name.c_str());
+            dialog->destroy();
+            ActionManager::clear();
+        };
+    }
+}
+
 void App::dialog_save()
 {
     if (canvas)