Program does not appear in TaskBar

[jpn]

Presumably you wanted something like this:

int main(int argc, char *argv[]){
	QApplication app(argc, argv);
        QString stylesheet("");
        app.setStyleSheet(stylesheet);
	PMain pm(0);
	pm.show(); // <--
	return app.exec();
}
 
class PMain : public QMainWindow // <--
{
    ...
};
 
PMain::PMain(QWidget *parent) : QMainWindow(parent) {
	Log("P system started.");
	pui.setupUi(this); // <--
	rows = 10;
	connect(pui.actionSave, SIGNAL(triggered()), this, SLOT(s_Save()));
	connect(pui.actionSave_As, SIGNAL(triggered()), this, SLOT(s_SaveAs()));
	connect(pui.actionOpen, SIGNAL(triggered()), this, SLOT(s_Open()));
}

int main(int argc, char *argv[]){
	QApplication app(argc, argv);
        QString stylesheet("");
        app.setStyleSheet(stylesheet);
	PMain pm(0);
	pm.show(); // <--
	return app.exec();
}

class PMain : public QMainWindow // <--
{
    ...
};

PMain::PMain(QWidget *parent) : QMainWindow(parent) {
	Log("P system started.");
	pui.setupUi(this); // <--
	rows = 10;
	connect(pui.actionSave, SIGNAL(triggered()), this, SLOT(s_Save()));
	connect(pui.actionSave_As, SIGNAL(triggered()), this, SLOT(s_SaveAs()));
	connect(pui.actionOpen, SIGNAL(triggered()), this, SLOT(s_Open()));
}

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