Question

我已经创建了treeview，我可以添加一些项目。基本上我想树视图所有目录和文件与图标相关联。所以我有这些功能：

向treeview添加项目

HTREEITEM AddItemToTree(HWND hwndTree, char *text, int nLevel)
{
    TVINSERTSTRUCT tvins;
    static HTREEITEM hPrev = (HTREEITEM)TVI_FIRST;
    static HTREEITEM hRootItem = NULL;
    static HTREEITEM hPrevLev2Item = NULL;
    AddIconToTree(hwndTree, text); //////////// THIS IS THE FUNCTION BELOW...
    tvi.mask = TVIF_TEXT | TVIF_IMAGE | TVIF_SELECTEDIMAGE | TVIS_STATEIMAGEMASK;
    tvi.iImage = 0;
    tvi.iSelectedImage = 0;
    tvi.pszText = GetFileNameFromPath(text);
    tvins.hInsertAfter = hPrev;
    tvins.item = tvi;

    if(nLevel == 1)
    {
        tvins.hParent = TVI_ROOT;
    }
    else if(nLevel == 2)
    {
        tvins.hParent = hRootItem;
    }
    else
    {
        TVITEM tviSetup;
        tviSetup.hItem = hPrev;
        tviSetup.mask = TVIF_PARAM;
        TVITEM * tviLocal = &tviSetup;
        TreeView_GetItem(hwndTree, tviLocal);

        if(nLevel > tviLocal->lParam)
        {
            tvins.hParent = hPrev;
        }
        else
        {
            HTREEITEM hPrevLocal = TreeView_GetParent(hwndTree, hPrev);
            tviLocal->hItem = hPrevLocal;
            TreeView_GetItem(hwndTree, tviLocal);
            for(int i = nLevel; i <= tviLocal->lParam;)
            {
                HTREEITEM hPrevLocalTemp = TreeView_GetParent(hwndTree, hPrevLocal);
                hPrevLocal = hPrevLocalTemp;
                tviLocal->hItem = hPrevLocal;
                TreeView_GetItem(hwndTree, tviLocal);
            }
            tviLocal->mask = TVIF_TEXT;
            TreeView_GetItem(hwndTree, tviLocal);
            tvins.hParent = hPrevLocal;

        }
    }

    hPrev = (HTREEITEM)SendMessage(hwndTree, TVM_INSERTITEM, 0, (LPARAM)(LPTVINSERTSTRUCT)&tvins);

    if(hPrev == 0)
    {
        return false;
    }
    if(nLevel == 1)
    {
        hRootItem = hPrev;
    }

    return hPrev;
}

向TREEVIEW添加图标：

int AddIconToTree(HWND hwndTree, char *strPath)
{
    SHFILEINFO sfi;
    memset(&sfi, 0, sizeof(sfi));
    SHGetFileInfo(strPath, FILE_ATTRIBUTE_NORMAL, &sfi, sizeof(sfi), SHGFI_ICON | SHGFI_USEFILEATTRIBUTES | SHGFI_SMALLICON);
    int index = sfi.iIcon;

    ICONINFO iconinfo;
    GetIconInfo(sfi.hIcon, &iconinfo);
    HBITMAP hBitmap = iconinfo.hbmColor;
    DestroyIcon(sfi.hIcon);

    himg = ImageList_Create(16, 16, ILC_COLOR32, 1, 1);
    int iImageList = ImageList_Add(himg, hBitmap, NULL);
    DeleteObject(hBitmap);

    //TreeView_SetImageList(hwndTree, himg, TVSIL_NORMAL);
    SendMessage(hwndTree, TVM_SETIMAGELIST, (WPARAM)TVSIL_NORMAL, (LPARAM)(HIMAGELIST)himg);
    MessageBox(hwnd, strPath, "Path:", MB_OK); /* Because of this msgbox I found out what is
    really happening, because without it everything I have seen when I run the program was
    treeview with icon of the last file, which was folder...So blank icon.*/
    return index;
}

我的主要问题是，当我设置一些图标时，它不仅设置为我想要的一个项目，而且设置在树视图中的所有项目上。所以基本上每个项目的图标都会被新项目的图标覆盖。顺便说一下，我知道如果我想得到文件夹的图标，我需要使用FILE_ATTRIBUTE_DIRECTORY ... 这就是它。任何帮助都会受到极大的关注！提前谢谢： - ）

Answer 1

在AddIconToTree功能中，您每次都会创建一个全新的图像列表，其中只会有一个图标。您需要维护相同的图像列表并向其添加其他图标，而不是为每个项目重新创建它。

或者，您可以使用SHGetImageList函数获取shell图像列表的句柄，然后直接将其分配给树。如果您不需要将任何自己的图像添加到树的图像列表中，这是一种更简单的方式来显示文件和文件夹的系统图标，因为shell图像列表可以处理所有这些图像。

// To initialise the tree's image list - do this one time only
HIMAGELIST himg;
if (SUCCEEDED(SHGetImageList(SHIL_SMALL, IID_IImageList, reinterpret_cast<void**>(&himg))))
    SendMessage(hwndTree, TVM_SETIMAGELIST, (WPARAM)TVSIL_NORMAL, (LPARAM)himg);

然后您的AddIconToTree功能变为：

int AddIconToTree(HWND hwndTree, char *strPath)
{
    SHFILEINFO sfi;
    memset(&sfi, 0, sizeof(sfi));

    // SHGFI_SYSICONINDEX will return the icon's index within the shell image list
    SHGetFileInfo(strPath, FILE_ATTRIBUTE_NORMAL, &sfi, sizeof(sfi),
        SHGFI_SYSICONINDEX | SHGFI_USEFILEATTRIBUTES);
    return sfi.iIcon;
}

当您实际向列表中添加项目时，请确保将索引分配给项目：

tvi.mask = TVIF_TEXT | TVIF_IMAGE | TVIF_SELECTEDIMAGE | TVIS_STATEIMAGEMASK;
tvi.iImage = tvi.iSelectedImage = AddIconToTree(hwndTree, text);

TreeView添加Shell图标

1 个答案: