I have a Windows HDC handle from an external library that I d like to use QPainter functionality to draw on. Is there any way in Qt to create a QPaintDevice from a HDC handle?
这样做的一种方式:
利用Windows AP,将HWND从C获得。
HWND handle = WindowFromDC(hdc);
assert(handle != NULL);
然后是后级的QWidget,以便接触受保护的成员。 采用这一方法,利用这一成员创建QWidget:)。 在这个例子中,我称之为QWidgetWrapper子级。
QWidgetWrapper *w = new QWidgetWrapper();
w->create((Wld)main_window);
请注意,Wld是Qt的“Platform附属窗口识别器”类型。
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