void create() { setTitle("Test Application"); setGeometry(Geometry(128, 128, 640, 480 )); layout.append(bProcess); layout.append(lvOutput); layout.append(baseN); layout.append(baseR); unsigned bn = integer(baseN.text()), br = integer(baseR.text()); if (br>=0 && br<=bn) { lstring hdr; for (unsigned i = 0; i < br; ++i) { hdr.append((string){i>0?",":"","B",i+1}); } lvOutput.setHeaderText(hdr); } bProcess.setText("Draw!"); bProcess.onActivate = [&]() { lvOutput.reset(); }; //Hook it all up append(layout); onClose = [&layout] { // layout.setSkipGeomUpdates(true); //Example of skipping pointless update calculations. OS::quit(); }; setVisible(); }