1.使用代码设置渐变
QLinearGradient linearGrad(QPointF(0, 0), QPointF(200, 200)); linearGrad.setColorAt(0, Qt::blue); linearGrad.setColorAt(1, Qt::white); linearGrad.setCoordinateMode(QGradient::StretchToDeviceMode); QBrush brush(linearGrad); item1->setBackground(brush);
2.QPixmap图片的缩放
Qsize picSize(600,400); //将pixmap缩放成picSize大小然后保存在scaledPixmap中 按比例缩放: QPixmap scaledPixmap = pixmap.scaled(picSize, Qt::KeepAspectRatio); 不按照比例缩放 QPixmap scaledPixmap = pixmap.scaled(picSize);
3.设置窗口不在任务栏显示并置顶
setWindowFlags(Qt::Tool | Qt::X11BypassWindowManagerHint | Qt::WindowStaysOnTopHint
);
4.QLineEdit去掉右键菜单
_ui->_passwordEdit->setContextMenuPolicy(Qt::NoContextMenu);//去掉右键菜单
5.去除QString中的空格
QString str = " lots\t of\nwhitespace\r\n "; str = str.trimmed(); // str == "lots\t of\nwhitespace" QString str = " lots\t of\nwhitespace\r\n "; str = str.simplified(); // str == "lots of whitespace";
6.QLabel实现超链接
ui->_userWebConnect->setOpenExternalLinks(true); ui->_userWebConnect->setText("<a href = \"http://zkuyun.com/\>显示的内容</a>");
7.QTreeView去掉父节点的下拉
treeView->setRootIsDecorated(false); // UI控件里，在右边的设置属性里找到 QTreeView那栏，将rootIs Decorated 复选框，不要勾选
Qt杂项设置(QLabel超链接、图片缩放、窗口不在任务栏显示并置顶等)
原文：http://www.cnblogs.com/zw-h/p/4032992.html