Qt 筛选框的实现 含头文件和cpp文件

#include "dialog_shaix.h" #include "ui_dialog_shaix.h" Dialog_shaix::Dialog_shaix(QWidget *parent) : QWidget(parent), ui(new Ui::Dialog_shaix) { ui->setupUi(this); pt_up = new QPushButton(this); pt_up->setIcon(QIcon(":/images/add.png")); pt_up->setIconSize(QSize(20,20)); pt_up->setText("升序"); this->pt_up->setFlat(true); pt_up->setFocusPolicy(Qt::NoFocus);//设置不聚焦 pt_up->setLayoutDirection(Qt::RightToLeft); pt_down = new QPushButton(this); pt_down->setIcon(QIcon(":/images/add.png")); pt_down->setIconSize(QSize(20,20)); pt_down->setText("降序"); this->pt_down->setFlat(true); pt_down->setFocusPolicy(Qt::NoFocus);//设置不聚焦 pt_down->setLayoutDirection(Qt::RightToLeft); pt_shaixuan = new QPushButton(this); pt_shaixuan->setIcon(QIcon(":/images/add.png")); pt_shaixuan->setIconSize(QSize(20,20)); pt_shaixuan->setText("筛选"); this->pt_shaixuan->setFlat(true); pt_shaixuan->setFocusPolicy(Qt::NoFocus);//设置不聚焦 pt_shaixuan->setLayoutDirection(Qt::RightToLeft); //搜索框 m_pSearchLineEdit = new QLineEdit(this); pSearchButton = new QPushButton(this); pSearchButton->setCursor(Qt::PointingHandCursor); pSearchButton->setFixedSize(20, 20); pSearchButton->setToolTip(QStringLiteral("搜索")); pSearchButton->setStyleSheet("QPushButton{border-image:url(:/image/main_data.png); background:transparent;} \ QPushButton:hover{border-image:url(:/image/main_data.png)} \ QPushButton:pressed{border-image:url(:/image/main_data.png)}"); //防止文本框输入内容位于按钮之下 QMargins margins = m_pSearchLineEdit->textMargins(); m_pSearchLineEdit->setTextMargins(margins.left(), margins.top(), pSearchButton->width(), margins.bottom()); m_pSearchLineEdit->setPlaceholderText(QStringLiteral("请输入搜索内容")); QHBoxLayout *pSearchLayout = new QHBoxLayout(); pSearchLayout->addStretch(); pSearchLayout->addWidget(pSearchButton); pSearchLayout->setSpacing(0); pSearchLayout->setContentsMargins(0, 0, 0, 0); m_pSearchLineEdit->setLayout(pSearchLayout); connect(pSearchButton, SIGNAL(clicked(bool)), this, SLOT(search())); treeview = new QTreeView(this); hboxlayout = new QHBoxLayout(this); pt_ok = new QPushButton("确定",this); pt_ok->resize(20,20); pt_close = new QPushButton("取消",this); pt_close->resize(20,20); hboxlayout->addSpacing(10); hboxlayout->addWidget(pt_ok); hboxlayout->addWidget(pt_close); ui->verticalLayout->addWidget(pt_up);//vboxlayout->addWidget(lable); ui->verticalLayout->addWidget(pt_down);//vboxlayout->addWidget(lable); ui->verticalLayout->addWidget(pt_shaixuan);//vboxlayout->addWidget(lable); ui->verticalLayout->addWidget(m_pSearchLineEdit);//vboxlayout->addWidget(lable); ui->verticalLayout->addWidget(treeview);//vboxlayout->addWidget(lable); ui->verticalLayout->addLayout(hboxlayout);//vboxlayout->addWidget(lable); ui->verticalLayout->setStretch(0,1); ui->verticalLayout->setStretch(0,1); ui->verticalLayout->setStretch(0,1); ui->verticalLayout->setStretch(0,1); ui->verticalLayout->setStretch(0,8); ui->verticalLayout->setStretch(0,1); connect(pt_up,SIGNAL(clicked()),this,SLOT(pt_up_clicked())); connect(pt_down,SIGNAL(clicked()),this,SLOT(pt_down_clicked())); connect(pt_shaixuan,SIGNAL(clicked()),this,SLOT(pt_shaixuan_clicked())); connect(pt_ok,SIGNAL(clicked()),this,SLOT(pt_ok_clicked())); connect(pt_close,SIGNAL(clicked()),this,SLOT(pt_close_clicked())); inittreeview(); //treeview->verticalHeader()->setVisible(false); / treeview->setHeaderHidden(true); //隐藏表头 treeview->expandAll();//默认展开所有 } Dialog_shaix::~Dialog_shaix() { delete ui; } void Dialog_shaix::inittreeview() //初始话treeview { QStandardItemModel* model = new QStandardItemModel(treeview); // model->setHorizontalHeaderLabels(QStringList()<<QStringLiteral("dgs")<<QStringLiteral("info")); // model->setHorizontalHeaderLabels(QStringList()<<QStringLiteral(" ")); QStandardItem* first = new QStandardItem("全选");//添加光缆1的 model->appendRow(first); first->setCheckable(true); first->setTristate(true); //model->setData(model->index(i,1),glid,Qt::DisplayRole); if(english_name != nullptr) { // qDebug()<<english_name<<m_map.keys(); // m_map.keys().size() for (int i=0;i<m_map.keys().size();i++) { QStandardItem* section = new QStandardItem(m_map.keys().at(i)); section->setCheckable(true); //section->setTristate(true); first->appendRow(section); //QStandardItem* secondDes = new QStandardItem(QString("第%1钟").arg(i)); //first->setChild(section->index().row(),1,secondDes); first->setChild(section->index().row(),0,section); } } connect(model,SIGNAL(itemChanged(QStandardItem*)),this,SLOT(treeItemChanged(QStandardItem*))); treeview->setModel(model); first->setCheckState( Qt::Checked);//默认为全选 treeview->expandAll();//默认展开所有 } void Dialog_shaix::treeItemChanged(QStandardItem *item) //有变化时进行触发 { if ( item == nullptr ) return ; if ( item->isCheckable ()) { //如果条目是存在复选框的，那么就进行下面的操作 Qt::CheckState state = item->checkState (); //获取当前的选择状态 if ( item->isTristate ()) { //如果条目是三态的，说明可以对子目录进行全选和全不选的设置 if ( state != Qt::PartiallyChecked ) { //当前是选中状态，需要对其子项目进行全选 treeItem_checkAllChild ( item , state == Qt::Checked ? true : false ); } } else { //说明是两态的，两态会对父级的三态有影响 //判断兄弟节点的情况 treeItem_CheckChildChanged (item); } // } } //当前是选中状态，需要对其子项目进行全选 void Dialog_shaix::treeItem_checkAllChild(QStandardItem * item, bool check) { if(item == nullptr) return; int rowCount = item->rowCount(); for(int i=0;i<rowCount;++i) { QStandardItem* childItems = item->child(i); treeItem_checkAllChild_recursion(childItems,check); } if(item->isCheckable()) item->setCheckState(check ? Qt::Checked : Qt::Unchecked); } void Dialog_shaix::treeItem_checkAllChild_recursion(QStandardItem * item,bool check) { if(item == nullptr) return; int rowCount = item->rowCount(); for(int i=0;i<rowCount;++i) { QStandardItem* childItems = item->child(i); treeItem_checkAllChild_recursion(childItems,check); } if(item->isCheckable()) item->setCheckState(check ? Qt::Checked : Qt::Unchecked); } void Dialog_shaix::pt_up_clicked() { QMessageBox::warning(this,tr("提示"),tr("功能开发中。。。。"),QMessageBox::Ok); } void Dialog_shaix::pt_down_clicked() { QMessageBox::warning(this,tr("提示"),tr("功能开发中。。。。"),QMessageBox::Ok); } void Dialog_shaix::pt_shaixuan_clicked() { QMessageBox::warning(this,tr("提示"),tr("功能开发中。。。。"),QMessageBox::Ok); } void Dialog_shaix::pt_ok_clicked() { emit sendtree_change();//发送变化 this->close(); } void Dialog_shaix::pt_close_clicked() { this->close(); } void Dialog_shaix::search() //搜索按钮按下 { QMessageBox::warning(this,tr("提示"),tr("搜索功能开发中。。。。"),QMessageBox::Ok); } void Dialog_shaix::get_name(QString head_name)//得到单机按钮所在列的列明 { QSqlQuery query; QString selectSql=QString("select * from name where name2='%1';").arg(head_name); query.ex