Test of wxWidgets DrawEllipticArc()

arc.cpp

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

class ArcFrame : public wxFrame
{
public:
    ArcFrame()
        : wxFrame(NULL, wxID_ANY, "DrawEllipticArc() test")
    {
        const auto canvas = new wxWindow(this, wxID_ANY, wxDefaultPosition,
                                         wxSize(300, 200),
                                         wxFULL_REPAINT_ON_RESIZE);
        const auto panel = new wxPanel(this);

        const auto startAngle = new wxSpinCtrl(panel);
        startAngle->SetRange(-720, 720);

        const auto endAngle = new wxSpinCtrl(panel);
        endAngle->SetRange(-720, 720);

        const auto drawArc = [=](wxCommandEvent&) { canvas->Refresh(); };

        startAngle->Bind(wxEVT_SPINCTRL, drawArc);
        endAngle->Bind(wxEVT_SPINCTRL, drawArc);

        canvas->Bind(wxEVT_PAINT, [=](wxPaintEvent&) {
            wxPaintDC dc(canvas);
            dc.DrawEllipticArc(wxPoint(0, 0), canvas->GetClientSize(),
                               startAngle->GetValue(), endAngle->GetValue());
        });

        const auto sizerControls = new wxBoxSizer(wxHORIZONTAL);
        sizerControls->Add(startAngle, wxSizerFlags().Centre().Border());
        sizerControls->Add(endAngle, wxSizerFlags().Centre().Border());
        panel->SetSizer(sizerControls);

        const auto sizer = new wxBoxSizer(wxVERTICAL);
        sizer->Add(panel, wxSizerFlags().Expand());
        sizer->Add(canvas, wxSizerFlags(1).Expand());

        SetSizerAndFit(sizer);
        Show();
    }
};

class ArcApp : public wxApp
{
public:
    bool OnInit() override
    {
        new ArcFrame();
        return true;
    }
};

wxIMPLEMENT_APP(ArcApp);