QTreeView自定义树的样式

• 先上一张效果图如下::

• 用 qt 绘制出所需要的线的样式： 

line.png

绘制代码： 

    QImage pixmap(50,36, QImage::Format_ARGB32);  //绘图设备
    
    QPen pen;           //画笔
    pen.setWidth(1);
    pen.setColor(Qt::black);
    pen.setStyle(Qt::DotLine);
    QPainter p(&pixmap);//画家
    p.setPen(pen);
    p.drawLine(15, 20, 40, 20);
    p.drawLine(15, 0, 15, 20);
   
    pixmap.save("../line.png");

• 网上找的加减号图标 

 

 

•  给树添加样式（结合以上素材）

ui.treeView->setStyleSheet( "QTreeView::item{height: 30px;show-decoration-selected: 0;}"
			                    "QTreeView::branch:open:has-children         
                               {image:url(:/tree/Resources/commit/ctr/jian.png);}"
                                "QTreeView::branch:closed:has-children 
                               {image:url(:/tree/Resources/commit/ctr/jia.png); }"
								"QTreeView::branch:has-siblings:adjoins-item
                            {border-image:  url(:/tree/Resources/tree/branch_more.png) 0;}"
								"QTreeView::branch:!has-children:!has-siblings:adjoins-item 
                              {border-image: url(:/tree/Resources/tree/branch_end.png) 0;}"
							 );

ui.treeView->expandAll();        //初始化树的状态为展开