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();