QT下 TableWidget 实现右键菜单栏，以及TableWidget整体美化工作。

转载请注明出处： http://blog.csdn.net/elfprincexu
QT TableWidget 是一个很常用的widget， 可以实现类似excel表格的效果。现在讲解一下如何实现右键菜单项选择。先附图如下

代码当中，
cpp 文件当中：
_tableWidget->setContextMenuPolicy(Qt::CustomContextMenu);
connect (_tableWidget, SIGNAL(customContextMenuRequested(QPoint)), SLOT(customMenuRequested(QPoint)))  	// right click connection

void MyClass::customMenuRequested(QPoint pos)
{
QTableWidgetItem* selecteditem = _tableWidget->itemAt(pos) ;	//get right click pos item
/*
* do sth  relative with current selected item
*  QString finalStr = selecteditem->text();
*/
QMenu* menu = new QMenu(this);
QAction* action = new QAction(tr(&Open Directory), this);
action->setData(finalStr )	;	// set data, for later in slot, we can get necessary info
menu->addAction(action);
menu->popup(_tableWidget->viewport()->mapToGlobal(pos)) ; 		//show the menu at right click pos
connect (action, SIGNAL(triggered()), this, SLOT(openDirectory));
}

void myClass::openDirectory()
{
QAction* action = qobject_cast<QAction*> (sender());
if (action == 0) return;

QString str = action->data();	//get previous data saved by us

//do sth relative with the action
QProcess proc;
proc.setWorkingDirectory(str);		// set current path as str we got
proc.start("gnone-Terminal");		// open a new terminal
bool result = proc.waitForStarted(1000);
result& = proc.waitForFinished(1000);

if (result) qDebug()<<"success";
else qDebug()<<"failure";

}

头文件中添加一个slot：
void customMenuRequested(QPoint pos);
void openDirectory();

附上tablewidge常用修饰代码： header 字体颜色，伸缩框样式，整行选取等

// set header for tablewidget
_tableWidget->setColumnCount(2);
QStringList headers;
headers<<"Creation Time"<<"GenDebug Name" ;
_tableWidget->setHorizontalHeaderLabels(headers);
// only selecting entire rows
_tableWidget->setSelectionBehavior(QAbstractItemView::SelectRows);
// only single row selection
_tableWidget->setSelectionMode(QAbstractItemView::SingleSelection);
// forbidden edit
_tableWidget->setEditTriggers(QAbstractItemView::NoEditTriggers);
// customcontext menu
_tableWidget->setContextMenuPolicy(Qt::CustomContextMenu);

// set header font, bold
QFont font = _tableWidget->horizontalHeader()->font();
font.setBold(true);
_tableWidget->horizontalHeader()->setFont(font);
_tableWidget->horizontalHeader()->setStretchLastSection(true);
_tableWidget->horizontalHeader()->resizeSection(0,150);
// set selection mode
_tableWidget->setStyleSheet("selection-background-color: darkblue");  // selection background color :blue
// set header height
_tableWidget->horizontalHeader()->setFixedHeight(25);
// set header bg color, horizontalscroll vericalscrollbar style
_tableWidget->horizontalHeader()->setStyleSheet("QHeaderView::section{background:skyblue;}");
_tableWidget->horizontalScrollBar()->setStyleSheet("QScrollBar{background:transparent; height:10px;}"
"QScrollBar::handle{background:lightgray; border:2px solid transparent; border-radius:5px;}"
"QScrollBar::handle:hover{background:gray;}"
"QScrollBar::sub-line{background:transparent;}"
"QScrollBar::add-line{background:transparent;}");
_tableWidget->verticalScrollBar()->setStyleSheet("QScrollBar{background:transparent; width: 10px;}"
"QScrollBar::handle{background:lightgray; border:2px solid transparent; border-radius:5px;}"
"QScrollBar::handle:hover{background:gray;}"
"QScrollBar::sub-line{background:transparent;}"
"QScrollBar::add-line{background:transparent;}");
// no highlight to header
_tableWidget->horizontalHeader()->setHighlightSections(false);