{"id":3831,"date":"2021-12-14T09:01:06","date_gmt":"2021-12-14T09:01:06","guid":{"rendered":"http:\/\/truelogic.org\/wordpress\/?p=3831"},"modified":"2021-12-14T09:01:07","modified_gmt":"2021-12-14T09:01:07","slug":"4b-wxwidgets-submenu","status":"publish","type":"post","link":"https:\/\/truelogic.org\/wordpress\/2021\/12\/14\/4b-wxwidgets-submenu\/","title":{"rendered":"4b. wxWidgets – Submenu"},"content":{"rendered":"\n

OVERVIEW<\/strong><\/p>\n\n\n\n

In this section, we will add a submenu to the File menu from the previous section and we will put the event handler on the menubar object so that all the menu items will be handled within a single click handler.<\/p>\n\n\n\n

SAMPLE CODE<\/strong><\/p>\n\n\n\n

menus.h<\/pre>\n\n\n
\n#include <wx\/wxprec.h>\n#ifndef WX_PRECOMP\n\t#include <wx\/wx.h>\n#endif\n#include <wx\/menu.h>\n\nclass Menus: public wxFrame {\n\n\tpublic:\n\t\tMenus(const wxString& title);\n\t\tvoid OnMenuItem(wxCommandEvent &evt);\n\n\t\twxMenuBar *mb;\n\t\twxMenu *mnuFile;\n\t\twxMenu *mnuEdit;\n\t\twxMenu *submenu;\n\n};\n\nconst int ID_NEW = 101;\nconst int ID_SAVE = 102;\nconst int ID_OPEN = 103;\n\nconst int ID_SUB_ONE = 201;\nconst int ID_SUB_TWO = 202;\nconst int ID_SUB_THREE = 203;\n\n\n\n<\/pre><\/div>\n\n\n
menus.cpp<\/pre>\n\n\n
\n#include "menus.h"\n\nMenus::Menus(const wxString& title):\n\twxFrame(NULL, -1, title, wxDefaultPosition, wxSize(500,300)) {\n\n\tmb = new wxMenuBar();\n\tmnuFile = new wxMenu();\n\twxMenuItem *mniFileNew = new wxMenuItem(mnuFile, ID_NEW, wxT("&New.."));\n\n\tmnuFile->Append(mniFileNew);\n\tmnuFile->Append(ID_SAVE, wxT("&Save.."));\n\tmnuFile->Append(ID_OPEN, wxT("&Open.."));\n\tmnuFile->AppendSeparator();\n\n\tsubmenu = new wxMenu();\n\tsubmenu->Append(ID_SUB_ONE, wxT("Menu item one"));\n\tsubmenu->Append(ID_SUB_TWO, wxT("Menu item two"));\n\tsubmenu->Append(ID_SUB_THREE, wxT("Menu item three"));\n\n\tmnuFile->AppendSubMenu(submenu, wxT("&Submenu"));\n\t\n\tmnuFile->AppendSeparator();\n\tmnuFile->Append(wxID_EXIT, wxT("&Quit"));\n\n\tmb->Bind(wxEVT_MENU, &Menus::OnMenuItem, this);\n\n\tmnuEdit = new wxMenu();\n\tmnuEdit->Append(-1, wxT("Copy\\tCtrl-C"));\n\tmnuEdit->Append(-1, wxT("Paste\\tCtrl-V"));\n\tmnuEdit->Append(-1, wxT("Cut\\tCtrl-X"));\n\n\tmb->Append(mnuFile, wxT("&File"));\n\tmb->Append(mnuEdit, wxT("&Edit"));\n\n\tSetMenuBar(mb);\n}\n\nvoid Menus::OnMenuItem(wxCommandEvent &evt) {\n\n\tint eventId= evt.GetId();\n\twxString strId = wxT("");\n\tstrId = wxString::Format(wxT("%d"), evt.GetId());\n\twxPuts(strId);\n\tif (eventId == ID_NEW) \n\t\twxLogMessage("New file menuitem");\n\telse if (eventId == ID_SAVE )\n\t\twxLogMessage("Save file menuitem");\n\telse if (eventId == ID_OPEN) \n\t\twxLogMessage("Open file menuitem");\n\telse if (eventId == wxID_EXIT)\n\t\tClose(true);\n}\n\n\n\n<\/pre><\/div>\n\n\n
The output is given below<\/p>\n\n\n\n
\"\"<\/figure>\n","protected":false},"excerpt":{"rendered":"
OVERVIEW In this section, we will add a submenu to the File menu from the previous section and we will put the event handler on […]<\/a><\/p>\n<\/div>","protected":false},"author":1,"featured_media":3595,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[302,365],"tags":[],"class_list":["post-3831","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cc","category-wxwidgets"],"_links":{"self":[{"href":"https:\/\/truelogic.org\/wordpress\/wp-json\/wp\/v2\/posts\/3831","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/truelogic.org\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/truelogic.org\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/truelogic.org\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/truelogic.org\/wordpress\/wp-json\/wp\/v2\/comments?post=3831"}],"version-history":[{"count":3,"href":"https:\/\/truelogic.org\/wordpress\/wp-json\/wp\/v2\/posts\/3831\/revisions"}],"predecessor-version":[{"id":3835,"href":"https:\/\/truelogic.org\/wordpress\/wp-json\/wp\/v2\/posts\/3831\/revisions\/3835"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/truelogic.org\/wordpress\/wp-json\/wp\/v2\/media\/3595"}],"wp:attachment":[{"href":"https:\/\/truelogic.org\/wordpress\/wp-json\/wp\/v2\/media?parent=3831"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/truelogic.org\/wordpress\/wp-json\/wp\/v2\/categories?post=3831"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/truelogic.org\/wordpress\/wp-json\/wp\/v2\/tags?post=3831"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}