实现如上的一个多级menu， Qt 中实现非常简单。 首先明确一个概念， QMenu表示“容器”， QAction表示具体的项。 所有上图中”其他”，“发票”等都要是QMenu， 而代充类型、有发票都要是QAction， 所以代码实现就非常简单了。
1. 构造
1 pMenu_ = new QMenu(tbaTableView_);
2 pBatchEditMenu_ = new QMenu(pMenu_);
3 pBatchEditOtherMenu_ = new QMenu(pBatchEditMenu_);
4 batchOtherBillMenu_ = new QMenu(pBatchEditMenu_);
5 batchOtherWarrantyMenu_ = new QMenu(pBatchEditMenu_);
6 batchOtherAutoSendMenu_ = new QMenu(pBatchEditMenu_);
7 batchOtherRecommendMenu_ = new QMenu(pBatchEditMenu_);
8 batchOtherDiscountMenu_ = new QMenu(pBatchEditMenu_);
2.析构
1 delete batchOtherBillMenu_;
2 delete batchOtherWarrantyMenu_;
3 delete batchOtherAutoSendMenu_;
4 delete batchOtherRecommendMenu_;
5 delete batchOtherDiscountMenu_;
6 delete pBatchEditOtherMenu_;
7 delete pBatchEditMenu_;
8 delete addItemsTimer_;
9 delete pMenu_;
注意顺序。
3. 代码实现
1 pBatchEditOtherMenu_ -> setTitle(tr( " 其他(Q) " ));
2 batchOtherBillMenu_ -> setTitle(tr( " 发票 " ));
3 batchOtherBillMenu_ -> addAction(tr( " 有发票 " ), this ,SLOT(haveBillBatchEdit()));
4 batchOtherBillMenu_ -> addAction(tr( " 无发票 " ), this ,SLOT(noBatchEdit()));
5 batchOtherRecommendMenu_ -> setTitle(tr( " 橱窗推荐 " ));
6 batchOtherDiscountMenu_ -> setTitle(tr( " 会员打折 " ));
7 pBatchEditMenu_ -> addMenu(pBatchEditOtherMenu_);
8 pBatchEditOtherMenu_ -> addMenu(batchOtherBillMenu_);
4. 快捷键以及分割线
1 QAction * openDetailPage = pMenu_ -> addAction(tr( " 打开宝贝页面 " ));
2 openDetailPage -> setShortcut(QKeySequence(tr( " Ctrl+B " )));
3 pMenu_ -> addSeparator();
