在MFC的Tree(CTreeCtrl)中为特定树项添加图标 [英] Add icon for specific tree items in Tree(CTreeCtrl) in MFC

问题描述

我们可以为特定的树项目添加图标吗?

Can we add icons for specific tree items?

我正在使用以下功能添加带有图标的项目:

I am adding items with icon using following function:

HTREEITEM InsertItem(LPCTSTR lpszItem,int nImage,int nSelectedImage,HTREEITEM hParent = TVI_ROOT,HTREEITEM hInsertAfter = TVI_LAST);

HTREEITEM InsertItem(LPCTSTR lpszItem,int nImage,int nSelectedImage,HTREEITEM hParent = TVI_ROOT,HTREEITEM hInsertAfter = TVI_LAST);

要跳过某个项目的图标，我将nImage和nSelectedImage的值设为-1.这样，图标就不会出现，但是空间就要来了.

To skip icon for an item, i am using -1 value for nImage and nSelectedImage. By doing this, icon is not appearing but space is coming.

推荐答案

您是否看过 CTreeCtrl :: SetItem ?

最简单的方法是填充并传递 TVITEM 结构.

The easiest is to fill and pass a TVITEM structure.

typedef struct tagTVITEM {
  UINT      mask;
  HTREEITEM hItem;
  UINT      state;
  UINT      stateMask;
  LPTSTR    pszText;
  int       cchTextMax;
  int       iImage;
  int       iSelectedImage;
  int       cChildren;
  LPARAM    lParam;
} TVITEM, *LPTVITEM;

您将mask设置为TVIF_IMAGE并指定iImage值.

首先，您需要创建一个CImageList对象，该对象在CTreeCtrl的持续时间内保持有效.您通常将其作为变量添加到类中.示例:

To begin, you need to create a CImageList object that stays valid for the duration of the CTreeCtrl. You usually add it to the class as a variable. Example:

m_imgList.Create(IDB_BMP_CHECK_IMAGELIST, 16, 10, 0x0000FF00);

初始化后，您可以调用 CTreeCtrl :: SetImageList .示例:

Once it is initialised you can call CTreeCtrl::SetImageList. Example:

m_treeCtrl.SetImageList(&m_imgList, LVSIL_SMALL);

此后，您可以使用图像索引值.

Thereafter you can use the image index values.

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