create NodeDialogOpen and bind it to the layout template

engine/canvas.cpp

@@ -2,6 +2,7 @@
 #include "log.h"
 #include "canvas.h"
 
+ui::Canvas* ui::Canvas::I;
 glm::vec3 ui::Canvas::m_plane_origin[6] = {
     { 0, 0,-1}, // front
     { 1, 0, 0}, // right
@@ -597,6 +598,7 @@ void ui::Canvas::project_open(std::string data_path)
     fclose(fp);
     LOG("project restore from %s", name);
 }
+
 ui::Image ui::Canvas::thumbnail_generate(int w, int h)
 {
     // save viewport and clear color states
@@ -657,6 +659,7 @@ ui::Image ui::Canvas::thumbnail_generate(int w, int h)
 
     return std::move(image);
 }
+
 ui::Image ui::Canvas::thumbnail_read(std::string data_path)
 {
     static char name[128];
@@ -677,6 +680,7 @@ ui::Image ui::Canvas::thumbnail_read(std::string data_path)
     LOG("project thumbnail read from %s", name);
     return std::move(thumb);
 }
+
 ///////////////////////////////////////////////////////////////////////////////////////////
 
 void ui::Layer::destroy()