第一次单击 ListWidget 的项目会引发错误？
我想问你一个问题。当我第一次单击 listwidget 的项目时，我看到应用程序输出中有一些文本行：
QPainter::begin: Paint device returned engine == 0, type: 3
QPainter::setWorldTransform: Painter not active
QPainter::worldTransform: Painter not active
QPainter::setWorldTransform: Painter not active
QPainter::setBrush: Painter not active
QPainter::setRenderHint: Painter must be active to set rendering hints
QPainter::setRenderHint: Painter must be active to set rendering hints
QPainter::setClipping: Painter not active, state will be reset by begin
这是一个错误吗？如何在应用程序输出中隐藏/禁用这些文本行？
I want to ask you a question. When I click on listwidget's item first time, I see there are some text lines in application output:
QPainter::begin: Paint device returned engine == 0, type: 3
QPainter::setWorldTransform: Painter not active
QPainter::worldTransform: Painter not active
QPainter::setWorldTransform: Painter not active
QPainter::setBrush: Painter not active
QPainter::setRenderHint: Painter must be active to set rendering hints
QPainter::setRenderHint: Painter must be active to set rendering hints
QPainter::setClipping: Painter not active, state will be reset by begin
Is it an error? How can I do to hide/disable these text lines in app output?
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这些都是QT的警告信息。
您可能遇到图像问题，原因是type == 3，
请检查设备类型。
Those are warning messages of QT.
You are probably having a problem with an image cause type == 3
Check this out for device types.