Qt QToolButton和QListWidget的使用

#include "mainwindow.h" #include "ui_mainwindow.h" #include <QMenu> #include <QDebug> #include <QMessageBox> //为QToolButton按钮设置Action void MainWindow::setActionsForButton() { ui->tBtnListIni->setDefaultAction(ui->actListIni); ui->tBtnListClear->setDefaultAction(ui->actListClear); ui->tBtnListInsert->setDefaultAction(ui->actListInsert); ui->tBtnListAppend->setDefaultAction(ui->actListAppend); ui->tBtnListDelete->setDefaultAction(ui->actListDelete); ui->tBtnSelALL->setDefaultAction(ui->actSelALL); //全选 ui->tBtnSelNone->setDefaultAction(ui->actSelNone); //空选 ui->tBtnSelInvs->setDefaultAction(ui->actSelInvs); //反选 } void MainWindow::createSelectionMenu() { //创建下拉菜单 QMenu *menuSelection = new QMenu(this); menuSelection->addAction(ui->actSelALL); menuSelection->addAction(ui->actSelNone); menuSelection->addAction(ui->actSelInvs); //listWidget上方的tBtnSelectItem按钮 ui->tBtnSelectItem->setPopupMode(QToolButton::MenuButtonPopup); ui->tBtnSelectItem->setToolButtonStyle(Qt::ToolButtonTextBesideIcon); ui->tBtnSelectItem->setDefaultAction(ui->actSelPopMenu); ui->tBtnSelectItem->setMenu(menuSelection); //工具栏上的下拉式菜单按钮 QToolButton *pmBtn = new QToolButton(this); pmBtn->setPopupMode(QToolButton::InstantPopup); pmBtn->setToolButtonStyle(Qt::ToolButtonTextUnderIcon); pmBtn->setDefaultAction(ui->actSelPopMenu); pmBtn->setMenu(menuSelection); ui->toolBar->addWidget(pmBtn); ui->toolBar->addSeparator(); //添加分割器 ui->toolBar->addAction(ui->actQuit); //添加退出action } MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent) , ui(new Ui::MainWindow) { ui->setupUi(this); setCentralWidget(ui->splitter); ui->listWidget->setContextMenuPolicy(Qt::CustomContextMenu); setActionsForButton(); createSelectionMenu(); } MainWindow::~MainWindow() { delete ui; } //“初始化列表”Action void MainWindow::on_actListIni_triggered() { QListWidgetItem *pmItem; QIcon aIcon; aIcon.addFile(":/images/icons/check2.ico"); bool chk = ui->chkBoxListEditable->isChecked(); ui->listWidget->clear(); for(int i=0; i<10; i++) { QString str = QString("Item %1").arg(i); pmItem = new QListWidgetItem(); pmItem->setText(str); pmItem->setIcon(aIcon); pmItem->setCheckState(Qt::Checked); if(chk) pmItem->setFlags(Qt::ItemIsSelectable | Qt::ItemIsUserCheckable |Qt::ItemIsEditable |Qt::ItemIsEnabled); else pmItem->setFlags( Qt::ItemIsUserCheckable |Qt::ItemIsSelectable |Qt::ItemIsEnabled); ui->listWidget->addItem(pmItem); } } //“清除列表”Action void MainWindow::on_actListClear_triggered() { ui->listWidget->clear(); } //“插入项”Action void MainWindow::on_actListInsert_triggered() { QIcon aIcon(":/images/icons/check2.ico"); bool chk = ui->chkBoxListEditable->isChecked(); QString str = QString("Item insert"); QListWidgetItem *pmItem = new QListWidgetItem(); pmItem->setText(str); pmItem->setIcon(aIcon); pmItem->setCheckState(Qt::Checked); if(chk) pmItem->setFlags(Qt::ItemIsSelectable | Qt::ItemIsEditable |Qt::ItemIsUserCheckable |Qt::ItemIsEnabled); else pmItem->setFlags( Qt::ItemIsSelectable |Qt::ItemIsUserCheckable |Qt::ItemIsEnabled); ui->listWidget->insertItem(ui->listWidget->currentRow(),pmItem); } //“删除当前项”Action void MainWindow::on_actListDelete_triggered() { int row = ui->listWidget->currentRow(); QListWidgetItem *pmItem = ui->listWidget->takeItem(row); delete pmItem; } //“添加项”Action void MainWindow::on_actListAppend_triggered() { QIcon aIcon(":/images/icons/check2.ico"); bool chk = ui->chkBoxListEditable->isChecked(); QString str = QString("Item add"); QListWidgetItem *pmItem = new QListWidgetItem(); pmItem->setText(str); pmItem->setIcon(aIcon); pmItem->setCheckState(Qt::Checked); if(chk) pmItem->setFlags(Qt::ItemIsSelectable | Qt::ItemIsEditable |Qt::ItemIsUserCheckable |Qt::ItemIsEnabled); else pmItem->setFlags( Qt::ItemIsSelectable |Qt::ItemIsUserCheckable |Qt::ItemIsEnabled); ui->listWidget->addItem(pmItem); } //"全选"Action void MainWindow::on_actSelALL_triggered() { QListWidgetItem *pmItem; int cnt = ui->listWidget->count(); for(int i = 0; i < cnt; ++i) { pmItem = ui->listWidget->item(i); //遍历拿到每个item pmItem->setCheckState(Qt::Checked); } } //"空选"Action void MainWindow::on_actSelNone_triggered() { QListWidgetItem *pmItem; int cnt = ui->listWidget->count(); for(int i = 0; i < cnt; ++i) { pmItem = ui->listWidget->item(i); //遍历拿到每个item pmItem->setCheckState(Qt::Unchecked); } } //"反选"Action void MainWindow::on_actSelInvs_triggered() { QListWidgetItem *pmItem; int cnt = ui->listWidget->count(); for(int i = 0; i < cnt; ++i) { pmItem = ui->listWidget->item(i); //遍历拿到每个item if(pmItem->checkState() == Qt::Checked) pmItem->setCheckState(Qt::Unchecked); else pmItem->setCheckState(Qt::Checked); } } //listWidget的currentItemChanged()信号 void MainWindow::on_listWidget_currentItemChanged(QListWidgetItem *current, QListWidgetItem *previous) { QString str; if(current != NULL) { if(previous == NULL) str = "当前: " +current->text(); else str ="前一项："+previous->text()+ ";当前: " +current->text(); ui->currentLineEdit->setText(str); ui->plainTextEdit->appendPlainText("currentItemChanged()信号被发射"); } } //是否允许排序 void MainWindow::on_chkBoxSorting_clicked(bool checked) { ui->listWidget->setSortingEnabled(checked); //qDebug()<<"chkBoxSorting:"<<ui->chkBoxSorting->click(); qDebug() <<"chkBoxSorting:" <<ui->chkBoxSorting->checkState(); qDebug() <<"checked" <<checked; } //升序排序 void MainWindow::on_tBtnSortAsc_clicked() { if(ui->chkBoxSorting->checkState()) ui->listWidget->sortItems(Qt::AscendingOrder); else QMessageBox::information(this,"友情提醒","请打开允许排序按钮"); } //降序排序 void MainWindow::on_tBtnSortDes_clicked() { if(ui->chkBoxSorting->checkState()) ui->listWidget->sortItems(Qt::DescendingOrder); else QMessageBox::information(this,"友情提醒","请打开允许排序按钮"); } void MainWindow::on_tBtnClearText_clicked() { ui->plainTextEdit->clear(); } void MainWindow::on_tBtnAddLine_2_clicked() { ui->plainTextEdit->appendPlainText(""); } //鼠标右键加载出action列表 void MainWindow::on_listWidget_customContextMenuRequested(const QPoint &pos) { Q_UNUSED(pos) ui->tBtnListIni->setDefaultAction(ui->actListIni); ui->tBtnListClear->setDefaultAction(ui->actListClear); ui->tBtnListInsert->setDefaultAction(ui->actListInsert); ui->tBtnListAppend->setDefaultAction(ui->actListAppend); ui->tBtnListDelete->setDefaultAction(ui->actListDelete); ui->tBtnSelALL->setDefaultAction(ui->actSelALL); //全选 ui->tBtnSelNone->setDefaultAction(ui->actSelNone); //空选 ui->tBtnSelInvs->setDefaultAction(ui->actSelInvs); //反选 QMenu *pmMenuList = new QMenu(this); pmMenuList->addAction(ui->actListIni); pmMenuList->addAction(ui->actListClear); pmMenuList->addAction(ui->actListInsert); pmMenuList->addActi