qtreewidget 显示保存xml文件
此文是读取和存储已知结构的xml,对于未知结构的xml,可以用递归方法读取和遍历。可参考文章:Qt遍历不规则树的节点。
1、QTreewidget设置
1 2 3 4 5 | //折叠图标(三角图标)换成自定义图标 ui->treeWidget->setStyleSheet("QTreeView::branch:has-children:!has-siblings:closed,\ QTreeView::branch:closed:has-children:has-siblings{border-image: none; image: url(:/images/plus.png);}\ QTreeView::branch:open:has-children:!has-siblings,\ QTreeView::branch:open:has-children:has-siblings{border-image: none; image: url(:/images/minus.png);}"); |
2、显示保存xml
头文件
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 | #ifndef PROCESSDEVICEXML_H #define PROCESSDEVICEXML_H #include <QObject> #include <QDomElement> #include <QTreeWidget> #include "public.h" #define ManageDeviceStr "ManageDevice" #define SystemStr "System" #define SubSystemStr "SubSystem" #define DeviceStr "Device" #define NameStr "name" #define TypeStr "type" #define DeviceXmlName "DeviceItem.xml" class ProcessDeviceXml : public QObject { Q_OBJECT public : explicit ProcessDeviceXml(QObject *parent = nullptr ); bool OpenXml(QString fileName, QList<DeviceInfo>& listDev, QTreeWidget* pTreeWg = NULL); void ShowXml(QDomElement &docElem, QList<DeviceInfo> &listDev, QTreeWidget *treeWg); bool SaveXML(QString fileName, QTreeWidget *pTreeWg); bool AddTreeItem(QTreeWidget *pTreeWg, QTreeWidgetItem *clickedItem, int itemType); bool delTreeItem(QTreeWidget *pTreeWg, QTreeWidgetItem *clickedItem, int nType); signals: public slots: private : }; #endif // PROCESSDEVICEXML_H |
源文件:
显示图标时,要换成自己的图标路径;如果出现编译不通过,需要根据情况修改一下。
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 | #include "processdevicexml.h" #include <QTextStream> #include <QMessageBox> #include <QFile> #include <QDebug> #include "public.h" #include "adddevicedlg.h" #include "extern.h" ProcessDeviceXml::ProcessDeviceXml(QObject *parent) : QObject(parent) { } bool ProcessDeviceXml::OpenXml(QString fileName, QList<DeviceInfo>& listDeviceName, QTreeWidget* pTreeWg) { QFile file(fileName); if (file.open(QIODevice::ReadOnly)) { QDomDocument dom; QString errorStr; int errorLine; int errorCol; if (!dom.setContent(&file, true , &errorStr, &errorLine, &errorCol)) { qDebug() << errorStr << "line: " << errorLine << "col: " << errorCol; file.close(); return false ; } else { pTreeWg->clear(); QDomElement docElem = dom.documentElement(); ShowXml(docElem, listDeviceName, pTreeWg); pTreeWg->expandAll(); } file.close(); return true ; } else { file.close(); return false ; } } void ProcessDeviceXml::ShowXml(QDomElement& docElem, QList<DeviceInfo>& listDev, QTreeWidget* treeWg) { //根节点 QTreeWidgetItem *projectItem = new QTreeWidgetItem(treeWg); QString projectName = docElem.attribute(NameStr); projectItem->setText(0, projectName); projectItem->setData(0, Qt::UserRole, QString::number(TypeProject)); projectItem->setIcon(0, QIcon(QStringLiteral( ":/image/system.png" ))); projectItem->setWhatsThis(0, SystemStr); listDev.clear(); QDomNode systemNode = docElem.firstChild(); while (!systemNode.isNull()) { DeviceInfo devInfo; devInfo.listDevName.clear(); QDomElement elementSystem = systemNode.toElement(); // try to convert the node to an element. if (elementSystem.tagName() == QStringLiteral(SystemStr)) { QTreeWidgetItem *systemItem = new QTreeWidgetItem(projectItem); //系统节点 QString strSystemName = elementSystem.attribute(NameStr); devInfo.qstrSystemName = strSystemName; systemItem->setText(0, strSystemName); systemItem->setData(0, Qt::UserRole, QString::number(TypeSystem)); systemItem->setIcon(0, QIcon(QStringLiteral( ":/image/system.png" ))); systemItem->setWhatsThis(0, SystemStr); //子系统节点 QDomNode subsystemNode = systemNode.firstChild(); while (!subsystemNode.isNull()) { QDomElement elementDev = subsystemNode.toElement(); if (elementDev.tagName() == QStringLiteral(SubSystemStr)) { QString strDevName = elementDev.attribute(NameStr); QTreeWidgetItem *subsystemItem = new QTreeWidgetItem(systemItem); subsystemItem->setText(0, strDevName); subsystemItem->setIcon(0, QIcon(QStringLiteral( ":/image/subSystem.png" ))); subsystemItem->setData(0, Qt::UserRole, QString::number(TypeSubsystem)); subsystemItem->setWhatsThis(0, SubSystemStr); QDomNode devNode = subsystemNode.firstChild(); while (!devNode.isNull()) { QDomElement elementDev = devNode.toElement(); if (elementDev.tagName() == QStringLiteral(DeviceStr)) { QString strDevName = elementDev.attribute(NameStr); QTreeWidgetItem *devItem = new QTreeWidgetItem(subsystemItem); devItem->setText(0, strDevName); devItem->setIcon(0, QIcon(QStringLiteral( ":/Qimage/device.png" ))); devItem->setWhatsThis(0, DeviceStr); devItem->setData(0, Qt::UserRole, QString::number(TypeDevice)); devInfo.listDevName.push_back(strDevName); } devNode = devNode.nextSibling(); } } subsystemNode = subsystemNode.nextSibling(); } } //下一个分组节点 listDev.push_back(devInfo); systemNode = systemNode.nextSibling(); } return ; } bool ProcessDeviceXml::SaveXML(QString fileName, QTreeWidget* pTreeWg) { QTreeWidgetItem *rootItem = pTreeWg->invisibleRootItem(); //树的根节点 int countSystem = rootItem->childCount(); if (countSystem <= 0) //列表树没有项 { return false ; } QFile db(fileName); if (!db.open(QIODevice::WriteOnly | QIODevice::Truncate)) return false ; //只写方式打开,并清空以前的信息 QDomDocument doc; QDomProcessingInstruction instruction; instruction = doc.createProcessingInstruction( "xml" , "version=\"1.0\" encoding=\"UTF-8\"" ); doc.appendChild(instruction); QDomElement root = doc.createElement(ManageDeviceStr); QString projectName = p_globalObject->getProjectName(); QDomAttr elementProjAttr = doc.createAttribute(NameStr); elementProjAttr.setValue(projectName); root.setAttributeNode(elementProjAttr); doc.appendChild(root); //添加根元素 QTreeWidgetItem* projectItem = rootItem->child(0); countSystem = projectItem->childCount(); for ( int i = 0; i < countSystem; i++) { QTreeWidgetItem *systemItem = projectItem->child(i); QString systemName = systemItem->text(0); QDomElement elementSystem = doc.createElement(SystemStr); QDomAttr elementSystemAttr = doc.createAttribute(NameStr); elementSystemAttr.setValue(systemName); elementSystem.setAttributeNode(elementSystemAttr); root.appendChild(elementSystem); int countSubsystem = systemItem->childCount(); for ( int j = 0; j < countSubsystem; j++) { QTreeWidgetItem *subsystemItem = systemItem->child(j); QDomElement elementSubsystem = doc.createElement(SubSystemStr); //子系统项属性name QString subsystemName = subsystemItem->text(0); QDomAttr elementSubsystemNameAttr = doc.createAttribute(NameStr); elementSubsystemNameAttr.setValue(subsystemName); elementSubsystem.setAttributeNode(elementSubsystemNameAttr); elementSystem.appendChild(elementSubsystem); int coutDev = subsystemItem->childCount(); for ( int k = 0; k < coutDev; k++) { QTreeWidgetItem *devItem = subsystemItem->child(k); QString devName = devItem->text(0); QDomElement elementChn = doc.createElement(DeviceStr); QDomAttr elementChnAttr = doc.createAttribute(NameStr); elementChnAttr.setValue(devName); elementChn.setAttributeNode(elementChnAttr); elementSubsystem.appendChild(elementChn); } } } QTextStream out(&db); out.setCodec( "UTF-8" ); doc.save(out, 4); db.close(); return true ; } bool ProcessDeviceXml::AddTreeItem(QTreeWidget* pTreeWg, QTreeWidgetItem* clickedItem, int itemType) { QString qstrCaption; int nType = TypeDevice; switch (itemType) { case TypeProject: //添加系统 qstrCaption = "添加系统" ; nType = TypeSystem; break ; case TypeSystem: //添加分系统 qstrCaption = "添加子系统" ; nType = TypeSubsystem; break ; case TypeSubsystem: //添加设备 case TypeDevice: qstrCaption = "添加设备" ; nType = TypeDevice; break ; default : break ; } AddDeviceDlg dlg; dlg.SetCaption(qstrCaption); if (dlg.exec() == QDialog::Rejected){ return false ; } QString txt = dlg.GetTxt(); QTreeWidgetItem *item = new QTreeWidgetItem(clickedItem); item->setText(0, txt); item->setData(0, Qt::UserRole, QString::number(nType)); item->setIcon(0, QIcon(QStringLiteral( ":image/group.png" ))); item->setWhatsThis(0, qstrCaption); pTreeWg->expandItem(clickedItem); return true ; } |
分类:
Qt
, qtreewidget/qtreeview
标签:
qtreewidget
, xml
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