SpinCtrl.cpp

#include <wx/app.h>
#include <wx/frame.h>
#include <wx/panel.h>
#include <wx/spinctrl.h>
#include <wx/stattext.h>

namespace SpinCtrlExample {
  class Frame : public wxFrame {
  public:
    Frame() : wxFrame {nullptr, wxID_ANY, "SpinCtrl example"} {
      spinCtrl1->SetValue(50);
      spinCtrl1->Bind(wxEVT_SPINCTRL, [&](wxCommandEvent& event) {
        text->SetLabel(wxString::Format("value = %d", spinCtrl1->GetValue()));
      });
    }
    
  private:
    wxPanel* panel = new wxPanel {this};
    wxSpinCtrl* spinCtrl1 = new wxSpinCtrl {panel, 100, wxEmptyString, {80, 50}};
    wxStaticText* text = new wxStaticText {panel, wxID_ANY, "value = 50", {80, 100}};
  };

  class Application : public wxApp {
    auto OnInit() -> bool override {return (new Frame)->Show();}
  };
}

wxIMPLEMENT_APP(SpinCtrlExample::Application);