//對於qdialog
//modal, mothod 1 (shake effect)
qdialog dlg(this);
// dlg.setwindowflags(qt::framelesswindowhint);//設定這個屬性dialog顯示不出來
dlg.setwindowflags(qt::framelesswindowhint | qt::dialog);//只有同時設定這連個屬性才能正常顯示dialog
dlg.move(100,100);
dlg.resize(400,300);
qpushbutton *btn = new qpushbutton("click", &dlg);
btn->show();
connect(btn, signal(clicked(bool)), &dlg, slot(close()));
dlg.exec();
// //modal, mothod 2 (shake effect)
// qdialog *pdlg = new qdialog(this);
// pdlg->setmodal(true);
// pdlg->setwindowflags(qt::framelesswindowhint | qt::dialog);
// qpushbutton *btn = new qpushbutton("click", pdlg);
// btn->show();
// connect(btn, signal(clicked(bool)), pdlg, slot(close()));
// pdlg->show();
// pdlg->resize(400,300);//必須放在此處
// //modal, mothod 3 (no shake effect)
// qdialog *pdlg = new qdialog();
// pdlg->setmodal(true);
// pdlg->setwindowflags(qt::framelesswindowhint);
// pdlg->show();
// //nomodal, mothod 1
// qdialog *pdlg = new qdialog(this);
// pdlg->setwindowflags(qt::framelesswindowhint);
// pdlg->show();
//對於qwidget
// qwidget *pwgt = new qwidget();//此處不能指定父視窗this,只能是0（null）或無參;
//// pwgt->setattribute(qt::wa_showmodal, true);//also ok
// pwgt->show();
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