{"id":564,"date":"2024-05-21T15:14:21","date_gmt":"2024-05-21T07:14:21","guid":{"rendered":"https:\/\/www.cuishaofeng.com\/?p=564"},"modified":"2024-10-22T14:38:35","modified_gmt":"2024-10-22T06:38:35","slug":"ttreeview%e3%80%81ttreenodes%e5%92%8cttreenode","status":"publish","type":"post","link":"https:\/\/www.cuishaofeng.com\/?p=564","title":{"rendered":"TTreeView\u3001TTreeNodes\u548cTTreeNode"},"content":{"rendered":"
<\/div>\n

TTreeView\u7531\u8282\u70b9\u6784\u6210\uff0c\u5efa\u6811\u901a\u8fc7\u5bf9TreeView.items\u5c5e\u6027\u8fdb\u884c\u64cd\u4f5c\u3002Items\u662f\u4e00\u4e2aTTreeNodes\u5bf9\u8c61\uff0c\u8fd9\u662f\u4e00\u4e2aTTreeNode\u96c6\u3002<\/p>\n\n\n\n

\u5e38\u7528\u7684\u5c5e\u6027<\/h3>\n\n\n\n
    \n
  1. Count\uff0c\u7ed3\u70b9\u4e2a\u6570\uff1b<\/li>\n\n\n\n
  2. Item[index]\uff0c\u901a\u8fc7index\u5f97\u5230\u7ed3\u70b9\uff1b<\/li>\n\n\n\n
  3. TTreeNode.Data\uff0c\u6307\u5411\u4e00\u4e2a\u6307\u9488\uff0c\u53ef\u4ee5\u5b58\u5bf9\u8c61\uff0c\u5b58\u6307\u9488\uff0c\u4e5f\u53ef\u4ee5\u5b58\u6574\u6570\uff1b<\/li>\n\n\n\n
  4. TTreeNode.Text\uff0c\u6811\u7ed3\u70b9\u7684\u6587\u672c\uff1b<\/li>\n\n\n\n
  5. TTreeNode.ImageIndex\uff0cTTreeNode.SelectedIndex\uff0c\u5206\u522b\u662f\u6811\u7ed3\u70b9\u56fe\u6807\u5e8f\u53f7\uff0c\u6811\u7ed3\u70b9\u9009\u4e2d\u65f6\u56fe\u6807\u5e8f\u53f7\uff0c\u7528\u4e8e\u8bbe\u7f6e\u6811\u7ed3\u70b9\u7684\u56fe\u6807\uff1b<\/li>\n\n\n\n
  6. TTreeNode.Expanded\u5c5e\u6027\u8868\u660e\u662f\u5426\u6240\u6709\u7684\u5b50\u9879\u90fd\u5168\u90e8\u5c55\u5f00\uff1b<\/li>\n\n\n\n
  7. TTreeNode.HasChildren\u5c5e\u6027\u8868\u660e\u4e00\u4e2a\u9879\u662f\u5426\u6709\u5b50\u9879\uff1b<\/li>\n\n\n\n
  8. TTreeNode.Focused\u5c5e\u6027\u786e\u5b9a\u7126\u70b9\u662f\u5426\u843d\u5728\u6b64\u8282\u70b9\u4e0a\uff0c\u88abFocus\u65f6\u4f1a\u4e00\u4e2a\u6807\u51c6\u7684\u65b9\u6846\u56f4\u4f4f\uff0c\u53ea\u80fd\u6709\u4e00\u4e2a\u8282\u70b9\u4f1a\u88ab\u805a\u7126\u3002\u00a0<\/li>\n\n\n\n
  9. TTreeNode.Selected\u5c5e\u6027\u8868\u660e\u4e00\u4e2a\u8282\u70b9\u662f\u5426\u88ab\u9009\u4e2d\uff0c\u540c\u6837\u53ea\u6709\u4e00\u4e2a\u8282\u70b9\u4f1a\u88ab\u9009\u4e2d\u3002<\/li>\n<\/ol>\n\n\n\n

    \u5e38\u7528\u7684\u65b9\u6cd5<\/h3>\n\n\n\n
      \n
    1. GetFirstNode\u00a0\u5f97\u5230\u6839\u7ed3\u70b9\uff1b<\/li>\n\n\n\n
    2. TTreeNode.GetNext\u00a0\u5f97\u5230\u672c\u8282\u70b9\u7684\u4e0b\u4e00\u4e2a\u7ed3\u70b9\uff0c\u914d\u5408GetFirstNode\u53ef\u4ee5\u904d\u5386\u6574\u4e2a\u6811\uff1b<\/li>\n\n\n\n
    3. AddFirst\u00a0\u6dfb\u52a0\u7b2c\u4e00\u4e2a\u6839\u8282\u70b9\uff0c\u6b64\u51fd\u6570\u6dfb\u52a0\u7684\u8282\u70b9\u603b\u6392\u5728\u524d\u9762\uff0c\u9664\u975e\u540e\u6765\u53c8\u4f7f\u7528\u6b64\u51fd\u6570\u6dfb\u52a0\u4e86\u4e00\u4e2a\u8282\u70b9\uff0c\u5219\u540e\u6dfb\u52a0\u7684\u8282\u70b9\u5c06\u6392\u5728\u524d\u9762\u3002\u8fd4\u56de\u65b0\u6dfb\u52a0\u7684\u8282\u70b9\u3002<\/li>\n\n\n\n
    4. AddChild<\/strong>\u6dfb\u52a0\u4e00\u4e2a\u5b50\u8282\u70b9\uff0c\u8981\u6c42\u6709\u7236\u8282\u70b9\u4f5c\u4e3a\u5176\u53c2\u6570\u3002\u8fd4\u56de\u65b0\u6dfb\u52a0\u7684\u8282\u70b9\u3002<\/li>\n\n\n\n
    5. Add\u6dfb\u52a0\u4e00\u4e2a\u5144\u5f1f\u8282\u70b9\uff0c\u8981\u6c42\u6709\u5144\u5f1f\u8282\u70b9\u4f5c\u4e3a\u5176\u53c2\u6570\u3002\u8fd4\u56de\u65b0\u6dfb\u52a0\u7684\u8282\u70b9\u3002<\/li>\n\n\n\n
    6. TTreeNode\u7684\u4e00\u4e9b\u7ed3\u70b9\u5173\u7cfb\u65b9\u6cd5\uff1aGetFirstChild,\u00a0GetLastChild,\u00a0GetPrevChild, and\u00a0GetNextChild\u5206\u522b\u8fd4\u56de\u5f53\u524d\u9879\u5b50\u9879\u7684\u7b2c\u4e00\u4e2a\u3001\u6700\u540e\u4e00\u4e2a\u548c\u524d\u4e00\u4e2a\u3001\u540e\u4e00\u4e2a\u9879\u3002GetNextSibling\u3001\u00a0GetPrevSibling\u5219\u8fd4\u56de\u5728\u540c\u4e00Level\u4e0b\u7684\u4e0b\u4e00\u4e2a\u548c\u4e0a\u4e00\u4e2a\u9879\u3002<\/li>\n<\/ol>\n\n\n\n

      \u5e38\u7528\u7684\u4e8b\u4ef6<\/h3>\n\n\n\n
        \n
      1. \u5f53\u4ece\u4e00\u4e2a\u8282\u70b9\u8df3\u5230\u53e6\u4e00\u4e2a\u8282\u70b9\uff0c\u4f1a\u89e6\u53d1TTreeView.OnChange<\/strong>\u4e8b\u4ef6\u3002\u8be5\u4e8b\u4ef6\u4e2d\uff0c\u5c06\u4f20\u9012node,\u5373\u5f53\u524d\u88ab\u9009\u4e2d\u7684\u8282\u70b9\u3002<\/li>\n\n\n\n
      2. \u5f53\u4fee\u6539\u4e00\u4e2a\u8282\u70b9\u7684text\u65f6\uff0c\u4f1a\u89e6\u53d1TTreeView.OnEdit\u4e8b\u4ef6\u3002<\/li>\n<\/ol>\n\n\n\n

        TreeView\u7684\u5e38\u89c1\u4f7f\u7528\u65b9\u6cd5<\/h2>\n\n\n\n

        \u6dfb\u52a0\u3001\u5220\u9664\u548c\u7f16\u8f91\u6811\u7ed3\u70b9<\/h3>\n\n\n\n
          \n
        1. \u7528AddFirst, AddFirstChild, AddChild\u7b49\u5148\u6dfb\u52a0\u6839\u8282\u70b9\uff0c\u5982Treeview.Items.AddFirst( nil, ‘Root’)\uff1b\u7136\u540e\u4ee5\u6b64\u4e3a\u57fa\u7840\uff0c\u6dfb\u52a0\u6b64\u9879\u7684\u5b50\u8282\u70b9\u3002<\/li>\n\n\n\n
        2. \u5220\u9664\u8282\u70b9\uff1aTreeview.Selected.Delete<\/li>\n\n\n\n
        3. \u7f16\u8f91\u8282\u70b9\u5185\u5bb9\uff1aTreeview.Selected.EditText<\/li>\n\n\n\n
        4. \u4e3a\u4e86\u63d0\u5347\u6548\u7387\uff0c\u907f\u514d\u754c\u9762\u5927\u5e45\u95ea\u52a8\uff0c\u6700\u597d\u4f7f\u7528TreeView.Items.BeginUpdate \u548c\u00a0TreeView.Items.EndUpdate \u65b9\u6cd5\uff1b<\/li>\n<\/ol>\n\n\n\n

          \u8bbe\u7f6e\u6811\u7ed3\u70b9\u56fe\u6807<\/h3>\n\n\n\n
            \n
          1. ImageIndex\uff1a\u5728\u5e38\u6001\u65f6\u9009\u7528\u7684\u56fe\u7684\u5e8f\u53f7\uff1b<\/li>\n\n\n\n
          2. SelectedIndex\uff1a\u5f53\u8282\u70b9\u88ab\u9009\u4e2d\u65f6\u5728TimageList \u4e2d\u9009\u4ec0\u4e48\u6837\u7684\u56fe\u8c61\uff1b<\/li>\n<\/ol>\n\n\n\n
            Items.BeginUpdate;\n  Items.Clear;\n  \/\/ \u5efa\u7acb\u7b2c\u4e00\u5c42\u8282\u70b9\n  AddElemntType2Tree(AElementTypeID, AAddNoChildNode);\n  \/\/ \u5efa\u7acb\u7b2c\u4e8c\u5c42\u8282\u70b9\n  if Items.GetFirstNode <> nil then\n  begin\n    oNode := Items[0]; \/\/ \u9009\u62e9\u7b2c\u4e00\u4e2a\u6784\u4ef6\u7c7b\u578b\u7ed3\u70b9\n    while oNode <> nil do\n    begin\n      UpdateTreeNode(oNode, ASelectedElementID);\n      oNode := oNode.getNextSibling;\n    end;\n  end;\n  \/\/ \u5c55\u5f00\n  if Selected <> nil then\n    Selected.Expanded := True\n  else if Items.Count > 0 then\n  begin\n    oNode := Items.GetFirstNode;\n    Assert(oNode <> nil);\n    \/\/ \u9009\u4e2d\u7b2c\u4e00\u4e2a\u8282\u70b9\u7684\u7b2c\u4e00\u4e2a\u5b50\u8282\u70b9(\u82e5\u5b58\u5728\u5219\u4e3a\u7b2c\u4e00\u4e2a\u6784\u4ef6\u7c7b\u578b\u4e0b\u7684\u7b2c\u4e00\u4e2a\u6784\u4ef6)\u3002\n    Selected := oNode.getFirstChild();\n    \/\/ \u82e5\u6ca1\u6709\u9009\u4e2d\u6784\u4ef6\uff0c\u5219\u9009\u4e2d\u7b2c\u4e00\u4e2a\u6784\u4ef6\u7c7b\u578b\u8282\u70b9\uff0c\u5426\u5219\u5c55\u5f00\u8282\u70b9\u3002\n    if Selected = nil then\n      Selected := oNode\n    else\n      Selected.Expanded := True;\n  end;\n  Items.EndUpdate;<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
            TTreeView\u7531\u8282\u70b9\u6784\u6210\uff0c\u5efa\u6811\u901a\u8fc7\u5bf9TreeView.items\u5c5e\u6027\u8fdb\u884c\u64cd\u4f5c\u3002Items\u662f\u4e00\u4e2aTTreeNodes\u5bf9\u8c61\uff0c\u8fd9\u662f\u4e00\u4e2aTTreeNode\u96c6\u3002 \u5e38\u7528\u7684\u5c5e\u6027 \u5e38\u7528\u7684\u65b9\u6cd5 \u5e38\u7528\u7684\u4e8b\u4ef6 TreeView\u7684\u5e38\u89c1\u4f7f\u7528\u65b9\u6cd5 \u6dfb\u52a0\u3001\u5220\u9664\u548c\u7f16\u8f91…<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[13],"tags":[60],"topic":[],"_links":{"self":[{"href":"https:\/\/www.cuishaofeng.com\/index.php?rest_route=\/wp\/v2\/posts\/564"}],"collection":[{"href":"https:\/\/www.cuishaofeng.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.cuishaofeng.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.cuishaofeng.com\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.cuishaofeng.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=564"}],"version-history":[{"count":1,"href":"https:\/\/www.cuishaofeng.com\/index.php?rest_route=\/wp\/v2\/posts\/564\/revisions"}],"predecessor-version":[{"id":565,"href":"https:\/\/www.cuishaofeng.com\/index.php?rest_route=\/wp\/v2\/posts\/564\/revisions\/565"}],"wp:attachment":[{"href":"https:\/\/www.cuishaofeng.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=564"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.cuishaofeng.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=564"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.cuishaofeng.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=564"},{"taxonomy":"topic","embeddable":true,"href":"https:\/\/www.cuishaofeng.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftopic&post=564"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}