CtreeCtrl展开时更换图标

最新推荐文章于 2019-01-18 16:22:06 发布

原创最新推荐文章于 2019-01-18 16:22:06 发布 · 304 阅读

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CC 4.0 BY-SA版权

本文介绍如何在C++树控件中实现展开与折叠时图标的变化，通过`voidCTreeCtrlEx::OnTvnItemexpanded`函数进行操作。

void CTreeCtrlEx::OnTvnItemexpanded(NMHDR *pNMHDR, LRESULT *pResult)
{
	LPNMTREEVIEW pNMTreeView = reinterpret_cast<LPNMTREEVIEW>(pNMHDR);
	TVITEM tviNew = pNMTreeView->itemNew;
	if (pNMTreeView->action == 1)
	{
		//设置非展开的图标
		SetItemImage(tviNew.hItem,ICON_FOLDER_FILE_T,ICON_FOLDER_FILE_T);
		
	}
	else
	{
		//设置展开的图标
		SetItemImage(tviNew.hItem,ICON_FOLDER_FILE_OPEN_T,ICON_FOLDER_FILE_OPEN_T);
	}
	*pResult = 0;
}