add QPainter widget

[jpn]

Well, actually this is not really a Qt but pure C++ issue. It should be something more like:

QLabel* l = new QLabel; // don't just declare a pointer, actually allocate something
l->setPixmap(pm); // use "->", not "."
mainLayout->addWidget(l);

QLabel* l = new QLabel; // don't just declare a pointer, actually allocate something
l->setPixmap(pm); // use "->", not "."
mainLayout->addWidget(l);

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