C++ QListWidgetItem::whatsThis方法代码示例

void PlaylistWindow::savePlaylist()
{
	//保存配置
	QFile *playlistFile = new QFile("playlist.txt");
	if (!playlistFile->open(QIODevice::WriteOnly | QIODevice::Text)){
		qDebug() << "save playlist file failed" << endl;
	}
	QString playlistStr = "{\nplaylist:\n[\n";
	for (int i = 0; i < listWidget->count(); i++) {
		QString listitem = "{\n";
		QListWidgetItem *item = listWidget->item(i);
		if (item->whatsThis() == "") {
			//local file
			listitem += "\"is_local\":\"1\",\n";
			listitem += "\"name\":\"" + QString(item->toolTip()) + "\"\n";

		}
		else {
			listitem += "\"is_local\": \"0\",\n";
			listitem += "\"name\":\"" + QString(item->toolTip()) + "\",\n";
			listitem += "\"link\":\"" + QString(playlist->media(i).canonicalUrl().toString()) + "\",\n";
			listitem += "\"id\":\"" + QString(item->whatsThis()) + "\"\n";
		}
		listitem += "},\n";
		playlistStr += listitem;
	}

	playlistStr += "]\n}";

	playlistFile->write(playlistStr.toLocal8Bit());
	playlistFile->close();
}

// =================
//    PRIVATE SLOTS
// =================
void DirWidget::startLoadThumbs(){
  //This just runs through the dir and loads all the thumbnails as needed
  if(DEBUG){ qDebug() << "Start Loading Thumbnails:" << needThumbs; }
  if(needThumbs.isEmpty()){ return; }
  needThumbs.removeDuplicates(); //just in case
  //QTime updatetime = QTime::currentTime().addMSecs(500);
  for(int i=0; i<needThumbs.length() && !stopload; i++){
    if(showDetails){
      //Use the tree widget
      QList<QTreeWidgetItem*> items = treeWidget->findItems(needThumbs[i], Qt::MatchExactly);
      if(items.isEmpty()){ continue; } //invalid item for some reason
      if(stopload){ return; } //stop right now
      QTreeWidgetItem *it = items.first();
      it->setIcon(0, QIcon( QPixmap(it->whatsThis(0).section("::::",1,100)).scaled(listWidget->iconSize(),Qt::IgnoreAspectRatio, Qt::FastTransformation) ) );
    }else{
      //Use the list widget
      QList<QListWidgetItem*> items = listWidget->findItems(needThumbs[i], Qt::MatchExactly);
      if(items.isEmpty()){ continue; }
      if(stopload){ return; } //stop right now
      QListWidgetItem *it = items.first();
      it->setIcon(QIcon( QPixmap(it->whatsThis().section("::::",1,100)).scaled(listWidget->iconSize(),Qt::IgnoreAspectRatio, Qt::FastTransformation) ) );
    }
    //if(QTime::currentTime() > updatetime){ QApplication::processEvents(); updatetime = QTime::currentTime().addMSecs(500); }//keep the UI snappy while loading a directory
  }
}

void TodoDialog::on_newItemEdit_textChanged(const QString &arg1) {
    // search notes when at least 2 characters were entered
    if (arg1.count() >= 2) {
        QList<QString> noteNameList = CalendarItem::searchAsUidList(
                arg1, ui->todoListSelector->currentText());
        firstVisibleTodoListRow = -1;

        for (int i = 0; i < ui->todoList->count(); ++i) {
            QListWidgetItem *item = ui->todoList->item(i);
            if (noteNameList.indexOf(item->whatsThis()) < 0) {
                item->setHidden(true);
            } else {
                if (firstVisibleTodoListRow < 0) {
                    firstVisibleTodoListRow = i;
                }
                item->setHidden(false);
            }
        }
    } else {  // show all items otherwise
        firstVisibleTodoListRow = 0;

        for (int i = 0; i < ui->todoList->count(); ++i) {
            QListWidgetItem *item = ui->todoList->item(i);
            item->setHidden(false);
        }
    }

    // let's highlight the text from the search line edit
    searchForSearchLineTextInNoteTextEdit();
}

/**
 * @brief Searches a todo item by uid in the todo list
 * @param uid
 * @return Returns the row of the todo item in the todo list, returns -1 if not found
 */
int TodoDialog::findTodoItemRowByUID(QString uid) {
    int count = ui->todoList->count();
    if (count == 0) {
        return -1;
    }

    for (int i = 0; i < count; i++) {
        QListWidgetItem *item = ui->todoList->item(i);
        if (item->whatsThis() == uid) {
            return i;
        }
    }

    return -1;
}

void ObjectExplorer::groupItemSelectionChanged()
{
  for(int i=0; i<mObjectList->count(); i++){
    mObjectList->item(i)->setHidden(true);
  }

  QString groupName;
  QListWidgetItem * item = nullptr;
  QList<QListWidgetItem *> items;
  items = mGroupList->selectedItems();
  for(int i=0; i<items.size(); i++)
  {
    groupName = items.at(i)->text();
    for(int j=0; j<mObjectList->count(); j++){
      item = mObjectList->item(j);
      if(item->whatsThis() == groupName){
        item->setHidden(false);
      }
    }
  }
}

void MobileApp::downloadStart()
{
    downloadsList.clear();
    hashs.clear();

    for (int i=0; i<ui->downloadListWidget->count(); i++)
    {
        QListWidgetItem *item = ui->downloadListWidget->item(i);
        if (item->checkState() == Qt::Checked)
        {
            //Generate download urls
            int n;
            if (ToNum(item->whatsThis(), &n))
            {
                if (groups.size() > n)
                {
                    for (int j=0; j<groups[n].books.size(); j++)
                    {
                        if (groups[n].books[j].needToDownload)
                        {
                            QString url = groups[n].books[j].URL;
                            downloadsList << url;
                            hashs << groups[n].books[j].hash;
                        }
                    }
                }
            }
        }
    }
    downloadNum = downloadsList.size();

    ui->downloadInfo->toolTip() = "";

    ui->downloadListWidget->setEnabled(false);
    ui->downloadBTN->setEnabled(false);


    // download the next file in downloadsList.
    downloadNext();
}