1.通過QPalette設定顏

//通過QPalette設定顏色--QPalette::ColorRole
QPalette p = widget->palette();
p.setColor(QPalette::Base,color);
widget->setPalette(p);

2.QComboBox下拉框

//QComboBox下拉框
QComboBox *comboBox =new QComboBox;
comboBox->addItem(tr("text1"));
comboBox->addItem(tr("text2"));
//獲取當前下拉框所在的位置
int index =
 
 comboBox->currentIndex();

3.新增所有顏色下拉框

//新增所有顏色下拉框
QStringList colorList = QColor::colorNames();
QString color;
foreach(color,colorList)
{
	QPixmap pix(QSize(70,20));
	pix.fill(QColor(color));
	comboBox->addItem(QIcon(pix),NULL);
	comboBox->setIconSize(QSize(70,20));
	comboBox->setSizeAdjustPolicy
 
(QComboBox::AdjustToContents);
}