qt pixmap直线
时间: 2023-09-07 14:13:22 浏览: 145
在QT中,可以使用QPixmap和QPainter来绘制直线。可以通过以下步骤实现:
1. 在代码中创建一个QPixmap对象,并设置其大小和格式,例如:QPixmap pixmap(800, 600);。
2. 创建一个QPainter对象,并将其与QPixmap关联,例如:QPainter painter(&pixmap);。
3. 使用QPainter的drawLine()函数绘制直线,指定直线的起点和终点坐标,例如:painter.drawLine(0, 0, 500, 500);。这将在QPixmap上绘制一条从原点到(500, 500)的直线。
4. 最后,在窗口的paintEvent()函数中,将QPixmap绘制到窗口上,例如:painter.drawPixmap(0, 0, pixmap);。
通过以上步骤,您可以在QT中使用QPixmap和QPainter绘制直线。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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