DragWidget::DragWidget(QWidget *parent) : QWidget(parent) { QFile dictionaryFile(":/dictionary/words.txt"); dictionaryFile.open(QIODevice::ReadOnly); QTextStream inputStream(&dictionaryFile); int x = 5; int y = 5; while (!inputStream.atEnd()) { QString word; inputStream >> word; if (!word.isEmpty()) { DragLabel *wordLabel = new DragLabel(word, this); wordLabel->move(x, y); wordLabel->show(); wordLabel->setAttribute(Qt::WA_DeleteOnClose); x += wordLabel->width() + 2; if (x >= 195) { x = 5; y += wordLabel->height() + 2; } } } QPalette newPalette = palette(); newPalette.setColor(QPalette::Window, Qt::white); setPalette(newPalette); setAcceptDrops(true); setMinimumSize(400, qMax(200, y)); setWindowTitle(tr("Draggable Text")); }
DragWidget::DragWidget(QWidget *parent) : QWidget(parent) { QFile dictionaryFile(":/words.txt"); if (dictionaryFile.exists() == false) { qDebug() << "words file doesn't exist"; // 因为此时QT的时间循环尚未开始,故exit, quit, closeAllWindows 都不起作用。 // qApp->exit(-1); // qApp->quit(); // qApp->closeAllWindows(); QTimer::singleShot(0, qApp, SLOT(quit())); } dictionaryFile.open(QIODevice::ReadOnly); QTextStream inputStream(&dictionaryFile); int x = 5; int y = 5; while (inputStream.atEnd() == false) { QString word; inputStream >> word; if (word.isEmpty() == false) { DragLabel *wordLabel = new DragLabel(word, this); wordLabel->move(x, y); wordLabel->show(); x += wordLabel->width() + 2; if (x >= 195) { x = 5; y += wordLabel->height() + 2; } } } QPalette newPalette = palette(); newPalette.setColor(QPalette::Window, Qt::yellow); setPalette(newPalette); // 接受鼠标拖拽, that's important! setAcceptDrops(true); setMinimumSize(400, qMax(200, y)); setWindowTitle("Dragable Text"); }
//! [0] DragWidget::DragWidget(QWidget *parent) : QWidget(parent) { QFile dictionaryFile(":/dictionary/words.txt"); dictionaryFile.open(QFile::ReadOnly); QTextStream inputStream(&dictionaryFile); //! [0] //! [1] int x = 5; int y = 5; while (!inputStream.atEnd()) { QString word; inputStream >> word; if (!word.isEmpty()) { DragLabel *wordLabel = new DragLabel(word, this); wordLabel->move(x, y); wordLabel->show(); x += wordLabel->width() + 2; if (x >= 245) { x = 5; y += wordLabel->height() + 2; } } } //! [1] //! [2] QPalette newPalette = palette(); newPalette.setColor(QPalette::Window, Qt::white); setPalette(newPalette); setMinimumSize(400, qMax(200, y)); setWindowTitle(tr("Fridge Magnets")); //! [2] //! [3] setAcceptDrops(true); }
FridgeMagnet::FridgeMagnet(QWidget *parent) : QWidget(parent) { setWindowTitle(tr("Fridge Magnets")); setAcceptDrops(true); // QString fileName; fileName = qmPath + "/words.txt"; QFile dictionaryFile(fileName); dictionaryFile.open(QFile::ReadOnly); QTextStream inputStream(&dictionaryFile); int x = 5; int y = 5; while (! inputStream.atEnd()) { QString word; inputStream >> word; if (!word.isEmpty()) { DragLabel *wordLabel = new DragLabel(word, this); wordLabel->move(x, y); wordLabel->show(); wordLabel->setAttribute(Qt::WA_DeleteOnClose); x += wordLabel->width() + 2; if (x >= 245) { x = 5; y += wordLabel->height() + 2; } } } }
//! [0] DragWidget::DragWidget(QWidget *parent) : QWidget(parent) { QFile dictionaryFile(":/dictionary/words.txt"); dictionaryFile.open(QFile::ReadOnly); QTextStream inputStream(&dictionaryFile); //! [0] //! [1] int x = 5; int y = 5; while (!inputStream.atEnd()) { QString word; inputStream >> word; if (!word.isEmpty()) { DragLabel *wordLabel = new DragLabel(word, this); wordLabel->move(x, y); wordLabel->show(); wordLabel->setAttribute(Qt::WA_DeleteOnClose); x += wordLabel->width() + 2; #if defined(Q_WS_MAEMO_5) || defined(Q_WS_SIMULATOR) if (x >= 345) { #else if (x >= 245) { #endif x = 5; y += wordLabel->height() + 2; } } } //! [1] //! [2] #ifndef Q_WS_S60 //Fridge magnets is used for demoing Qt on S60 and themed backgrounds look better than white QPalette newPalette = palette(); newPalette.setColor(QPalette::Window, Qt::white); setPalette(newPalette); #endif setMinimumSize(400, qMax(200, y)); setWindowTitle(tr("Fridge Magnets")); //! [2] //! [3] setAcceptDrops(true); } //! [3] //! [4] void DragWidget::dragEnterEvent(QDragEnterEvent *event) { //! [4] //! [5] if (event->mimeData()->hasFormat("application/x-fridgemagnet")) { if (children().contains(event->source())) { event->setDropAction(Qt::MoveAction); event->accept(); } else { event->acceptProposedAction(); //! [5] //! [6] } //! [6] //! [7] } else if (event->mimeData()->hasText()) { event->acceptProposedAction(); } else { event->ignore(); } } //! [7] //! [8] void DragWidget::dragMoveEvent(QDragMoveEvent *event) { if (event->mimeData()->hasFormat("application/x-fridgemagnet")) { if (children().contains(event->source())) { event->setDropAction(Qt::MoveAction); event->accept(); } else { event->acceptProposedAction(); } } else if (event->mimeData()->hasText()) { event->acceptProposedAction(); } else { event->ignore(); } } //! [8] //! [9] void DragWidget::dropEvent(QDropEvent *event) { if (event->mimeData()->hasFormat("application/x-fridgemagnet")) { const QMimeData *mime = event->mimeData(); //! [9] //! [10] QByteArray itemData = mime->data("application/x-fridgemagnet"); QDataStream dataStream(&itemData, QIODevice::ReadOnly); QString text; QPoint offset; dataStream >> text >> offset; //! [10] //! [11] DragLabel *newLabel = new DragLabel(text, this); newLabel->move(event->pos() - offset); newLabel->show(); newLabel->setAttribute(Qt::WA_DeleteOnClose); if (event->source() == this) { event->setDropAction(Qt::MoveAction); event->accept(); } else { event->acceptProposedAction(); } //! [11] //! [12] } else if (event->mimeData()->hasText()) { QStringList pieces = event->mimeData()->text().split(QRegExp("\\s+"), QString::SkipEmptyParts); QPoint position = event->pos(); foreach (QString piece, pieces) { DragLabel *newLabel = new DragLabel(piece, this); newLabel->move(position); newLabel->show(); newLabel->setAttribute(Qt::WA_DeleteOnClose); position += QPoint(newLabel->width(), 0); }