Merge main

src/slic3r/GUI/MainFrame.hpp

@@ -40,6 +40,9 @@
 // Stable identifiers for MainFrame::m_tabpanel's built-in pages. These are
 // names rather than positional indices so optional pages cannot shift them.
 #define TAB_ID_HOME          "home"
+#ifdef SLIC3R_CAD
+#define TAB_ID_DESIGN        "design"
+#endif
 #define TAB_ID_PREPARE       "prepare"
 #define TAB_ID_PREVIEW       "preview"
 #define TAB_ID_MONITOR       "monitor"
@@ -65,6 +68,9 @@ namespace GUI
 class Tab;
 class PrintHostQueueDialog;
 class Plater;
+#ifdef SLIC3R_CAD
+class DesignPanel;
+#endif
 class MainFrame;
 class WebViewPanel;
 class ParamsDialog;
@@ -403,6 +409,17 @@ public:
     BBLTopbar*            m_topbar{ nullptr };
     PrintHostQueueDialog* printhost_queue_dlg() { return m_printhost_queue_dlg; }
     Plater*               m_plater { nullptr };
+#ifdef SLIC3R_CAD
+    // The tab page is the placeholder; m_design_panel stays null until the tab is first
+    // selected, so everything the Design panel builds stays off the startup path.
+    wxPanel*              m_design_page { nullptr };
+    DesignPanel*          m_design_panel { nullptr };
+    // Builds the Design panel if it does not exist yet and returns it (null only before the
+    // placeholder page itself exists). Main thread only -- it creates wx controls. Both the
+    // tab activation and the MCP socket go through this: the socket is driven headlessly,
+    // with nobody to click the tab, and without this every verb would answer "not ready".
+    DesignPanel*          ensure_design_panel();
+#endif
     //BBS: GUI refactor
     MonitorPanel*         m_monitor{ nullptr };