QPainter Constructor Syntax Question

[Lykurg]

Since I already gave an example of creating the object on the heap,

...which were wrong. You are missing a *.
But anyway. What do you don't like with

QPainter p(this);

QPainter p(this);

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Would

QPainter p;

QPainter p;

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satisfy you? If so great, because

QPainter p(this);

QPainter p(this);

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is just a shorthand for

QPainter p;
p.begin(this);

QPainter p;
p.begin(this);

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Or please elaborate, what puzzles you exactly.