{"id":135,"date":"2023-02-21T16:34:23","date_gmt":"2023-02-21T08:34:23","guid":{"rendered":"https:\/\/zkxx.xyz\/?p=135"},"modified":"2023-02-21T17:10:03","modified_gmt":"2023-02-21T09:10:03","slug":"qt-%e9%a1%b9%e7%9b%ae%e8%a7%86%e5%9b%be%e7%bb%84item-views%e4%b8%8e%e9%a1%b9%e7%9b%ae%e6%8e%a7%e4%bb%b6%e7%bb%84item-widget","status":"publish","type":"post","link":"https:\/\/zkxx.xyz\/index.php\/2023\/02\/21\/qt-%e9%a1%b9%e7%9b%ae%e8%a7%86%e5%9b%be%e7%bb%84item-views%e4%b8%8e%e9%a1%b9%e7%9b%ae%e6%8e%a7%e4%bb%b6%e7%bb%84item-widget\/","title":{"rendered":"Qt \u9879\u76ee\u89c6\u56fe\u7ec4(Item Views)\u4e0e\u9879\u76ee\u63a7\u4ef6\u7ec4(Item Widget)"},"content":{"rendered":"\n<h4 class=\"wp-block-heading\">\u9879\u76ee\u89c6\u56fe\u7ec4(Item Views)<\/h4>\n\n\n\n<p>\u9879\u76ee\u89c6\u56fe\u7ec4\u5982\u56fe\u6240\u793a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"266\" height=\"169\" src=\"https:\/\/zkxx.xyz\/wp-content\/uploads\/2023\/02\/image-23.png\" alt=\"\" class=\"wp-image-137\"\/><\/figure>\n\n\n\n<p>\u9879\u76ee\u89c6\u56fe\u7ec4\u5404\u4e2a\u63a7\u4ef6\u540d\u79f0\u89e3\u91ca:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>List View \uff1a\u6e05\u5355\u89c6\u56fe<\/li>\n\n\n\n<li>Tree View \uff1a\u6811\u89c6\u56fe<\/li>\n\n\n\n<li>Table View \uff1a\u8868\u89c6\u56fe<\/li>\n\n\n\n<li>Column View \uff1a\u5217\u89c6\u56fe<\/li>\n\n\n\n<li>Undo View \uff1a\u64a4\u9500\u5217\u8868<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">\u9996\u5148\u4ecb\u7ecd\u4e00\u4e0bTable View \u548c Table Widget\u7684\u533a\u522b<\/h4>\n\n\n\n<p>\u533a\u522b\u5982\u4e0b\u8868<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>\u533a\u522b <br><br>  <br> <br> <\/td><td>QTableView<\/td><td>QTableWidget<\/td><\/tr><tr><td>\u7ee7\u627f\u5173\u7cfb<\/td><td><\/td><td>QTableWidget\u7ee7\u627f\u81eaQTableView<\/td><\/tr><tr><td>\u4f7f\u7528\u6570\u636e\u6a21\u578bsetModel<\/td><td>\u53ef\u4ee5\u4f7f\u7528setModel\u8bbe\u7f6e\u6570\u636e\u6a21\u578b<\/td><td>setModel\u662f\u79c1\u6709\u51fd\u6570\uff0c\u4e0d\u80fd\u4f7f\u7528\u8be5\u51fd\u6570\u8bbe\u7f6e\u6570\u636e\u6a21\u578b<\/td><\/tr><tr><td>\u663e\u793a\u590d\u9009\u6846<\/td><td>\u6ca1\u6709\u51fd\u6570\u5b9e\u73b0\u590d\u9009\u6846<\/td><td>QTableWidgetItem\u7c7b\u4e2d\u7684setCheckState (Qt::Checked); \u53ef\u4ee5\u8bbe\u7f6e\u590d\u9009\u6846<\/td><\/tr><tr><td>\u4e0eQSqlTableModel\u7ed1\u5b9a<\/td><td>QTableView\u80fd\u4e0eQSqlTableModel\u7ed1\u5b9a<\/td><td>QTableWidget\u4e0d\u80fd\u4e0eQSqlTableModel\u7ed1\u5b9a<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6a21\u578b\uff1a\u6240\u6709\u7684\u6a21\u578b\u90fd\u57fa\u4e8eQAbstractItemModel\u7c7b\uff0c\u8be5\u7c7b\u4e3a\u62bd\u8c61\u57fa\u7c7b\u3002<\/li>\n\n\n\n<li>\u89c6\u56fe\uff1a\u6240\u6709\u7684\u89c6\u56fe\u90fd\u662f\u4eceQAbstractItemView\u7ee7\u627f\u3002<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">Item Views\u548cItem Widgets\u7684\u5173\u7cfb\u548c\u533a\u522b<\/h4>\n\n\n\n<p>\u8fd9\u4e24\u7c7b\u63a7\u4ef6\u90fd\u53ef\u4ee5\u5b9e\u73b0\u754c\u9762\u7684\u8868\u9879\u89c6\u56fe\u5c55\u793a\uff0c\u4e8c\u8005\u4e4b\u95f4\u5b58\u5728\u5173\u7cfb\u548c\u533a\u522b\uff1a<br>1\u3001Item Views\uff08Model-Based\uff09\u7c7b\u5185\u7684\u63a7\u4ef6\u662fItem Widgets\uff08Item-Based\uff09\u5185\u5bf9\u5e94\u63a7\u4ef6\u7684\u7236\u7c7b\uff0c\u5982QTreeWidget\u662f\u4eceQTreeView\u6d3e\u751f\u7684\uff1b<\/p>\n\n\n\n<p>2\u3001Item Views\uff08Model-Based\uff09\u7684\u5bf9\u8c61\u8fdb\u884c\u6570\u636e\u64cd\u4f5c\u76f8\u5bf9\u6bd4\u8f83\u590d\u6742\uff0c\u4f46\u5904\u7406\u53ca\u5c55\u793a\u5927\u6570\u636e\u91cf\u65f6\u6027\u80fd\u9ad8\uff0c\u800cItem Widgets\u7684\u6570\u636e\u64cd\u4f5c\u6bd4\u8f83\u7b80\u5355\uff0c\u4f46\u5904\u7406\u53ca\u5c55\u793a\u5927\u6570\u636e\u91cf\u65f6\u6027\u80fd\u76f8\u5bf9\u4f4e\uff1b<\/p>\n\n\n\n<p>3\u3001Item Views\u7c7b\u63a7\u4ef6\u662fMVC\uff08Model\u3001View\u3001Controller\uff09\u67b6\u6784\u7684\u4e00\u79cd\u7b80\u5316\uff0c\u6570\u636e\u548c\u5c55\u73b0\u53ca\u5b9e\u73b0\u903b\u8f91\u5206\u5f00\uff0c\u6570\u636e\u5728Model\u4e2d\u5b58\u50a8\u548c\u64cd\u4f5c\uff0cView\u8d1f\u8d23\u5c55\u73b0\u3001\u754c\u9762\u64cd\u4f5c\u53ca\u903b\u8f91\u63a7\u5236\uff1bItem Widgets\u5219\u5c06\u6570\u636e\u3001\u5c55\u73b0\u53ca\u63a7\u5236\u5408\u5e76\u5728\u4e00\u8d77\uff0c\u5f00\u53d1\u4e2d\u6ca1\u6709Item Views\u7075\u6d3b\uff0c\u5b9e\u9645\u4e0aItem Widgets\u5c31\u662f\u5728Item Views\u7684\u57fa\u7840\u4e0a\u7ed1\u5b9a\u4e86\u4e00\u4e2a\u9ed8\u8ba4\u7684\u5b58\u50a8\u5e76\u63d0\u4f9b\u4e86\u76f8\u5173\u65b9\u6cd5\u3002<\/p>\n\n\n\n<p>InterView \u6846\u67b6\u63d0\u4f9b\u4e86\u4e00\u4e9b\u5e38\u89c1\u7684\u6a21\u578b\u7c7b\u548c\u89c6\u56fe\u7c7b\uff0c\u5982 QStandardItemModel\u3001QDirModel\u3001QStringListModel\u3001QProxyModel\u548cQColumnView\u3001QHeaderView\u3001QListView\u3001QTableView\u3001QTreeView\u3002\u5176\u4e2d\uff0cQDirModel\u53ef\u4ee5\u901a\u8fc7\u6811\u72b6\u65b9\u5f0f\u663e\u793a\u67d0\u4e2a\u76ee\u5f55\u4e0b\u6240\u6709\u7684\u5b50\u76ee\u5f55\u4ee5\u53ca\u76f8\u5173\u4fe1\u606f\uff1bQProxyModel\u7528\u4e8e\u5c06\u65e7\u7684Model\u7c7b\u578b\u8fc7\u6e21\u5230\u65b0\u7684\u7c7b\u578b\u4e0a\uff1bQStandardItemModel\u4f7f\u7528\u6700\u7b80\u5355\u7684Grid\u65b9\u5f0f\u663e\u793aModel\u3002\u800c\u4e14\u6211\u4eec\u8fd8\u53ef\u4ee5\u4eceQAbstractItemModel\uff0cQAbstractProxyModel\uff0cQAbstractTableModel\u4e2d\u7ee7\u627f\u51fa\u7b26\u5408\u81ea\u5df1\u8981\u6c42\u7684Model\u3002 \u6162\u6162\u6765\u5427 \u4ee5\u540e\u518d\u770b\u3002<\/p>\n\n\n\n<p>\u76f8\u5bf9\u4e8e\u4f7f\u7528\u73b0\u6709\u7684\u6a21\u578b\u548c\u89c6\u56fe\uff0cQt\u8fd8\u63d0\u4f9b\u4e86\u66f4\u4e3a\u4fbf\u6377\u7684\u7c7b\u7528\u4e8e\u5904\u7406\u5e38\u89c1\u7684\u4e00\u4e9b\u6570\u636e\u6a21\u578b\u3002\u4ed6\u4eec\u5c06\u6a21\u578b\u548c\u89c6\u56fe\u5408\u4e8c\u4e3a\u4e00\uff0c\u56e0\u6b64\u4fbf\u4e8e\u5904\u7406\u4e00\u4e9b\u5e38\u89c4\u7684\u6570\u636e\u7ed3\u6784\u3002\u4f7f\u7528\u8fd9\u4e9b\u7c7b\u578b\u867d\u7136\u7b80\u5355\u65b9\u4fbf\uff0c\u4f46\u662f\u4e5f\u5931\u53bb\u4e86\u6a21\u578b\/\u89c6\u56fe\u7ed3\u6784\u7684\u7075\u6d3b\u6027\uff0c\u56e0\u6b64\u9700\u8981\u89c1\u673a\u884c\u4e8b\u3002<\/p>\n\n\n\n<p>QTableWidget\u7ee7\u627f\u81eaQTableView\u3002QSqlTableModel\u80fd\u591f\u4e0eQTableView\u7ed1\u5b9a\uff0c\u4f46\u662f\u4e0d\u80fd\u548cQTableWidget\u7ed1\u5b9a\u3002\u6bd4\u5982\u4e0b\u9762\u8fd9\u6bb5\u4ee3\u7801<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: cpp; title: ; notranslate\" title=\"\">\n    QSqlTableModel *model = new QSqlTableModel;\n    model-&gt;setTable(&quot;employee&quot;);\n    model-&gt;setEditStrategy(QSqlTableModel::OnManualSubmit);\n    model-&gt;select();\n    model-&gt;removeColumn(0);  \/\/ \u4e0d\u663e\u793aID\n    model-&gt;setHeaderData(0,Qt::Horizontal,tr(&quot;name&quot;));\n    model-&gt;setHeaderData(1,Qt::Horizontal,tr(&quot;Salary&quot;));\n    QTableView *view = new QTableView;\n    view-&gt;setModel(model);\n    view-&gt;show();\n<\/pre><\/div>\n\n\n<p>\u9700\u8981\u6ce8\u610f\u5f97\u662f\u89c6\u56fe\u4e0e\u6a21\u578b\u8fdb\u884c\u7ed1\u5b9a\u65f6\uff0c\u6a21\u578b\u5fc5\u987b\u4f7f\u7528new\u521b\u5efa\uff0c\u5426\u5219\u89c6\u56fe\u4e0d\u80fd\u968f\u7740\u6a21\u578b\u5f97\u6539\u53d8\u800c\u6539\u53d8\u3002<\/p>\n\n\n\n<p>\u5178\u578b\u9519\u8bef\uff1a<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: cpp; title: ; notranslate\" title=\"\">\nQStandardItemModel model(4,2);\nmodel.setHeaderData(0,Qt::Horizontal,tr(Label));\nmodel.setHeaderData(1,Qt::Horizontal,tr(Quantity));\nui-&gt;tableView-&gt;setModel(&amp;model);\nfor(int row = 0; row &lt; 4; row++)\n{\n    for(int column = 0; column &lt; 2; column++)\n    {\n        QModelIndex index = model.index(row,column,QModelIndex());\n        model.setData(index,QVariant((row+1) * (column+1)));\n    }\n}\n<\/pre><\/div>\n\n\n<p>\u6b63\u786e\u7684\u5199\u6cd5\u5e94\u8be5\u662f\u8fd9\u6837\u7684:<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: cpp; title: ; notranslate\" title=\"\">\nQStandardItemModel *model;\nmodel = new QStandardItemModel(4,2);\nmodel-&gt;setHeaderData(0,Qt::Horizontal,tr(Label));\nmodel-&gt;setHeaderData(1,Qt::Horizontal,tr(Quantity));\nui-&gt;tableView-&gt;setModel(model);\nfor(int row = 0; row &lt; 4; row++)\n{\n    for(int column = 0; column &lt; 2; column++)\n    {\n        QModelIndex index = model-&gt;index(row,column,QModelIndex());\n        model-&gt;setData(index,QVariant((row+1) * (column+1)));\n    }\n}\n<\/pre><\/div>\n\n\n<h4 class=\"wp-block-heading\">\u9879\u76ee\u63a7\u4ef6\u7ec4(Item Widgets)<\/h4>\n\n\n\n<p>\u9879\u76ee\u63a7\u4ef6\u7ec4\u5982\u56fe\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"287\" height=\"125\" src=\"https:\/\/zkxx.xyz\/wp-content\/uploads\/2023\/02\/image-22.png\" alt=\"\" class=\"wp-image-136\"\/><\/figure>\n\n\n\n<p>\u5404\u4e2a\u63a7\u4ef6\u540d\u79f0\u89e3\u91ca\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>List Widget \uff1a\u6e05\u5355\u63a7\u4ef6<\/li>\n\n\n\n<li>Tree Widget \uff1a\u6811\u578b\u63a7\u4ef6<\/li>\n\n\n\n<li>Table Widget \uff1a\u8868\u63a7\u4ef6<\/li>\n<\/ul>\n\n\n\n<p>\u4f8b\u5b50\uff1a<\/p>\n\n\n\n<p>\u521b\u5efa\u4e00\u4e2a\u5177\u6709\u590d\u9009\u6846\u7684\u6811\u5f62\u63a7\u4ef6\u3002<\/p>\n\n\n\n<p>\u5728Qt\u4e2d\uff0c\u6811\u5f62\u63a7\u4ef6\u79f0\u4e3aQTreeTable\uff0c\u800c\u63a7\u4ef6\u91cc\u7684\u6811\u8282\u70b9\u79f0\u4e3aQTreeWidgetItem\u3002\u8fd9\u79cd\u63a7\u4ef6\u6709\u7684\u65f6\u5019\u975e\u5e38\u6709\u7528\uff0c\u6bd4\u5982\u7fa4\u53d1\u90ae\u4ef6\u9700\u8981\u4e00\u4e2a\u6811\u5f62\u7684\u591a\u9009\u6846\u63a7\u4ef6\u3002<\/p>\n\n\n\n<p>\u9700\u6c42\uff1a<\/p>\n\n\n\n<p>\u5f53\u9009\u4e2d\u9876\u5c42\u6811\u8282\u70b9\uff0c\u5b50\u8282\u70b9\u5168\u90e8\u88ab\u9009\u4e2d\uff0c\u53d6\u6d88\u540c\u4e0a\uff0c\u5f53\u5b50\u8282\u70b9\u88ab\u9009\u4e2d\u7684\u65f6\u5019\uff0c\u7236\u8282\u70b9\u663e\u793a\u90e8\u5206\u9009\u4e2d\u7684\u72b6\u6001\u3002<\/p>\n\n\n\n<p>\u4f7f\u7528Qt\u8bbe\u8ba1\u5668\u8fdb\u884c\u754c\u9762\u8bbe\u8ba1\uff0c\u7136\u540e\u901a\u8fc7\u4fe1\u53f7\u4e0e\u69fd\u8fdb\u884c\u94fe\u63a5\uff0c\u6539\u53d8\u4fe1\u53f7(itemChanged(QTreeWidgetItem *item,int column)),\u5b9e\u73b0\u8fd9\u4e2a\u4fe1\u53f7\u5373\u53ef\u3002<\/p>\n\n\n\n<p>\u5b9e\u73b0\uff1a<\/p>\n\n\n\n<p>\u65b0\u5efa\u4e00\u4e2aWidget\u81ea\u5e26ui\u7684\u9879\u76ee\uff0c\u8fd9\u4e2a\u4e0d\u591a\u8bf4\u4e86\u3002<\/p>\n\n\n\n<p>\u5728\u8bbe\u8ba1\u5668\u4e2d\u5c06QTree Widget\u63a7\u4ef6\u62d6\u8fdbwidget\u3002<\/p>\n\n\n\n<p>\u5728widget.h\u4e2d\u6dfb\u52a0\u5982\u4e0b\u5934\u6587\u4ef6\u4ee5\u53ca\u4ee3\u7801\uff1a<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: cpp; title: ; notranslate\" title=\"\">\n#include&lt;QTreeWidgetItem&gt;\n\npublic:\nvoid init(); \/\/\u521d\u59cb\u5316\u51fd\u6570 void updateParentItem(QTreeWidgetItem *item);\npublic slots:\nvoid onTreeItemChanged(QTreeWidgetItem *item,int column);\n<\/pre><\/div>\n\n\n<p>\u63a5\u4e0b\u6765\u5728widget.cpp\u4e2d\u5b9e\u73b0\u4e0a\u9762\u7684\u51fd\u6570\uff0c\u5e76\u4e14\u5728\u6784\u9020\u51fd\u6570\u4e2d\u8c03\u7528\uff1a<\/p>\n\n\n\n<p>\u6784\u9020\u51fd\u6570\u6dfb\u52a0\u5982\u4e0b\u4ee3\u7801\uff1a<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: cpp; title: ; notranslate\" title=\"\">\ninit();\nconnect(ui-&gt;treeWidget,SIGNAL(itemChanged(QTreeWidgetItem,int)),this,SLOT(onTreeItemChanged(QTreeWidgetItem, int)));\n<\/pre><\/div>\n\n\n<p>init()\u5b9e\u73b0<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: cpp; title: ; notranslate\" title=\"\">\nvoid myTreeWidget::init()\n{\n    ui-&gt;treeWidget-&gt;clear();\n    QTreeWidgetItem *group1 = new QTreeWidgetItem(ui-&gt;treeWidget);\n    group1-&gt;setText(0,tr(\u4e8c\u6b21));\n    group1-&gt;setFlags(Qt::ItemIsUserCheckable|Qt::ItemIsEnabled|Qt::ItemIsSelectable);\n    group1-&gt;setCheckState(0,Qt::Unchecked);\n    QTreeWidgetItem *subItem11 = new QTreeWidgetItem(group1);\n    subItem11-&gt;setCheckState(0,Qt::Unchecked);\n    subItem11-&gt;setFlags(Qt::ItemIsUserCheckable|Qt::ItemIsEnabled|Qt::ItemIsSelectable);\n    subItem11-&gt;setText(0,subItem11);\n    QTreeWidgetItem *subItem12 = new QTreeWidgetItem(group1);\n    subItem12-&gt;setCheckState(0,Qt::Unchecked);\n    subItem12-&gt;setFlags(Qt::ItemIsUserCheckable|Qt::ItemIsEnabled|Qt::ItemIsSelectable);\n    subItem12-&gt;setText(0,subItem12);\n\n    QTreeWidgetItem *subItem13 = new QTreeWidgetItem(group1);\n    subItem13-&gt;setCheckState(0,Qt::Unchecked);\n    subItem13-&gt;setFlags(Qt::ItemIsUserCheckable|Qt::ItemIsEnabled|Qt::ItemIsSelectable);\n    subItem13-&gt;setText(0,subItem13);\n\n    QTreeWidgetItem *subItem14 = new QTreeWidgetItem(group1);\n    subItem14-&gt;setCheckState(0,Qt::Unchecked);\n    subItem14-&gt;setFlags(Qt::ItemIsUserCheckable|Qt::ItemIsEnabled|Qt::ItemIsSelectable);\n    subItem14-&gt;setText(0,subItem14);\n\n    QTreeWidgetItem *group2 = new QTreeWidgetItem(ui-&gt;treeWidget);\n    group2-&gt;setText(0,tr(\u4e09\u6b21));\n    group2-&gt;setFlags(Qt::ItemIsUserCheckable|Qt::ItemIsEnabled|Qt::ItemIsSelectable);\n    group2-&gt;setCheckState(0,Qt::Unchecked);\n    QTreeWidgetItem *subItem21 = new QTreeWidgetItem(group2);\n    subItem21-&gt;setCheckState(0,Qt::Unchecked);\n    subItem21-&gt;setFlags(Qt::ItemIsUserCheckable|Qt::ItemIsEnabled|Qt::ItemIsSelectable);\n    subItem21-&gt;setText(0,subItem21);\n\n    QTreeWidgetItem *subItem22 = new QTreeWidgetItem(group2);\n    subItem22-&gt;setCheckState(0,Qt::Unchecked);\n    subItem22-&gt;setFlags(Qt::ItemIsUserCheckable|Qt::ItemIsEnabled|Qt::ItemIsSelectable);\n    subItem22-&gt;setText(0,subItem22);\n\n    QTreeWidgetItem *subItem23 = new QTreeWidgetItem(group2);\n    subItem23-&gt;setCheckState(0,Qt::Unchecked);\n    subItem23-&gt;setFlags(Qt::ItemIsUserCheckable|Qt::ItemIsEnabled|Qt::ItemIsSelectable);\n    subItem23-&gt;setText(0,subItem23);\n\n    QTreeWidgetItem *subItem24 = new QTreeWidgetItem(group2);\n    subItem24-&gt;setCheckState(0,Qt::Unchecked);\n    subItem24-&gt;setFlags(Qt::ItemIsUserCheckable|Qt::ItemIsEnabled|Qt::ItemIsSelectable);\n    subItem24-&gt;setText(0,subItem24);\n}\n<\/pre><\/div>\n\n\n<p><br>onTreeItemChanged\u51fd\u6570\u5b9e\u73b0<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\nvoid myTreeWidget::onTreeItemChanged(QTreeWidgetItem *item, int column)\n{\n    QString itemText = item-&gt;text(0);\n    int count = item-&gt;childCount();\n    if(Qt::Checked == item-&gt;checkState(0))\n    {\n        if(count&gt;0)\n        {\n            for(int i = 0; i &amp;lt; count; i++) \n                item-&gt;child(i)-&gt;setCheckState(0,Qt::Checked);\n        \n        }\n       else   \/\/\u662f\u5b50\u8282\u70b9\n           updateParentItem(item);\n\n    }\n    else if(Qt::Unchecked == item-&gt;checkState(0))\n    {\n        if(count&gt;0)\n        {\n            for(int i = 0; i &amp;lt; count; i++) \n                item-&gt;child(i)-&gt;setCheckState(0,Qt::Unchecked);\n\n        }\n        else    \/\/\u662f\u5b50\u8282\u70b9\n            updateParentItem(item);\n\n    }\n}\n<\/pre><\/div>\n\n\n<p>updateParentItem\u51fd\u6570\u5b9e\u73b0<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: cpp; title: ; notranslate\" title=\"\">\nvoid myTreeWidget::updateParentItem(QTreeWidgetItem *item)\n{\n    QTreeWidgetItem *parent = item-&gt;parent();\n    if(parent == NULL)\n        return;\n\n    int selectedCount = 0;\n    int childCount = parent-&gt;childCount();\n    for (int i = 0; i &lt; childCount; i++) \n    {\n        QTreeWidgetItem *childItem = parent-&gt;child(i);\n        if(childItem-&gt;checkState(0) == Qt::Checked)\n            selectedCount++;\n\n    }\n    if(selectedCount &lt;= 0)  \/\/\u672a\u9009\u4e2d\u72b6\u6001 \n        parent-&gt;setCheckState(0,Qt::Unchecked);\n\n    else if(selectedCount &gt; 0 &amp;&amp; selectedCount &lt; childCount) \n        parent-&gt;setCheckState(0,Qt::PartiallyChecked);\n\n    else if(selectedCount == childCount)\n        parent-&gt;setCheckState(0,Qt::Checked);\n\n}\n<\/pre><\/div>\n\n\n<p>\u65b9\u4fbf\u4f7f\u7528\u6211\u4eec\u6253\u5f00\u8bbe\u8ba1\u5668 \u53f3\u952eTreeWidget\u63a7\u4ef6\u9009\u62e9DoubleChicked\uff0c\u8bbe\u7f6e\u5176\u53cc\u51fb\u6539\u53d8\u72b6\u6001<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: cpp; title: ; notranslate\" title=\"\">\nvoid myTreeWidget::on_treeWidget_itemDoubleClicked(QTreeWidgetItem *item, int column)\n{\n    QTreeWidgetItem *parent = item-&gt;parent();\n    if(parent == NULL)\n        return;\n\n    if(Qt::Unchecked == item-&gt;checkState(0))\n        item-&gt;setCheckState(0,Qt::Checked);\n\n    else if(Qt::Checked == item-&gt;checkState(0))\n        item-&gt;setCheckState(0,Qt::Unchecked);\n\n}\n<\/pre><\/div>\n\n\n<p>\u6548\u679c\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"641\" height=\"476\" src=\"https:\/\/zkxx.xyz\/wp-content\/uploads\/2023\/02\/image-24.png\" alt=\"\" class=\"wp-image-138\" srcset=\"https:\/\/zkxx.xyz\/wp-content\/uploads\/2023\/02\/image-24.png 641w, https:\/\/zkxx.xyz\/wp-content\/uploads\/2023\/02\/image-24-300x223.png 300w\" sizes=\"auto, (max-width: 641px) 100vw, 641px\" \/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>\u9879\u76ee\u89c6\u56fe\u7ec4(Item Views) \u9879\u76ee\u89c6\u56fe\u7ec4\u5982\u56fe\u6240\u793a \u9879\u76ee\u89c6\u56fe\u7ec4\u5404\u4e2a\u63a7\u4ef6\u540d\u79f0\u89e3\u91ca: \u9996\u5148\u4ecb\u7ecd\u4e00\u4e0bTable  [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[20],"tags":[],"class_list":["post-135","post","type-post","status-publish","format-standard","hentry","category-qt"],"_links":{"self":[{"href":"https:\/\/zkxx.xyz\/index.php\/wp-json\/wp\/v2\/posts\/135","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/zkxx.xyz\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/zkxx.xyz\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/zkxx.xyz\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/zkxx.xyz\/index.php\/wp-json\/wp\/v2\/comments?post=135"}],"version-history":[{"count":5,"href":"https:\/\/zkxx.xyz\/index.php\/wp-json\/wp\/v2\/posts\/135\/revisions"}],"predecessor-version":[{"id":145,"href":"https:\/\/zkxx.xyz\/index.php\/wp-json\/wp\/v2\/posts\/135\/revisions\/145"}],"wp:attachment":[{"href":"https:\/\/zkxx.xyz\/index.php\/wp-json\/wp\/v2\/media?parent=135"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/zkxx.xyz\/index.php\/wp-json\/wp\/v2\/categories?post=135"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/zkxx.xyz\/index.php\/wp-json\/wp\/v2\/tags?post=135"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}