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转自:http://my.oschina.net/voler/blog/345722
目录[-]
https://github.com/leichaojian/qt/tree/master/drop1
https://github.com/leichaojian/qt/tree/master/drop
https://github.com/leichaojian/qt/tree/master/drop3
https://github.com/leichaojian/qt/tree/master/drop4
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MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui( new Ui::MainWindow) { ui->setupUi( this ); textEdit = new QTextEdit; setCentralWidget(textEdit); } |
如果我们想在主框架中得到响应的文件信息,则我们必须亲自实现文件拖放操作。
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//当用户拖动文件到窗口部件上时候,就会触发dragEnterEvent事件 void MainWindow::dragEnterEvent(QDragEnterEvent *event) { //如果为文件,则支持拖放 if (event->mimeData()->hasFormat( "text/uri-list" )) event->acceptProposedAction(); } //当用户放下这个文件后,就会触发dropEvent事件 void MainWindow::dropEvent(QDropEvent *event) { //注意:这里如果有多文件存在,意思是用户一下子拖动了多个文件,而不是拖动一个目录 //如果想读取整个目录,则在不同的操作平台下,自己编写函数实现读取整个目录文件名 QList<QUrl> urls = event->mimeData()->urls(); if (urls.isEmpty()) return ; //往文本框中追加文件名 foreach(QUrl url, urls) { QString file_name = url.toLocalFile(); textEdit->append(file_name); } } |
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void Dialog::moveCurrentItem(QListWidget *source, QListWidget *target) { if (source->currentItem()) { QListWidgetItem *newItem = source->currentItem()->clone(); target->addItem(newItem); target->setCurrentItem(newItem); delete source->currentItem(); } } |
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void ProjectListWidget::mousePressEvent(QMouseEvent *event) { //获取鼠标按下时候的坐标 if (event->button() == Qt::LeftButton) startPos = event->pos(); QListWidget::mousePressEvent(event); } void ProjectListWidget::mouseMoveEvent(QMouseEvent *event) { if (event->buttons() & Qt::LeftButton) { int distance = (event->pos() - startPos).manhattanLength(); //如果长度大于推荐的拖动起始距离,则认为是拖动(存在用户手抖的情况) if (distance >= QApplication::startDragDistance()) performDrag(); } QListWidget::mouseMoveEvent(event); } //有文件拖动到窗口上时,触发此dragEnterEvent事件 void ProjectListWidget::dragEnterEvent(QDragEnterEvent *event) { //当为同一个应用程序的一部分时,event->source()返回启动这个拖动窗口部件的指针 ProjectListWidget *source = qobject_cast<ProjectListWidget *>(event->source()); if (source && source != this ) { //确认是一个移动的操作 event->setDropAction(Qt::MoveAction); event->accept(); } } void ProjectListWidget::dragMoveEvent(QDragMoveEvent *event) { ProjectListWidget *source = qobject_cast<ProjectListWidget *>(event->source()); if (source && source != this ) { event->setDropAction(Qt::MoveAction); event->accept(); } } void ProjectListWidget::dropEvent(QDropEvent *event) { ProjectListWidget *source = qobject_cast<ProjectListWidget *>(event->source()); if (source && source != this ) { //得到数据并增加到列表中 addItem(event->mimeData()->text()); event->setDropAction(Qt::MoveAction); event->accept(); } } void ProjectListWidget::performDrag() { //当前被拖动的选项 QListWidgetItem *item = currentItem(); if (item) { QMimeData *mimeData = new QMimeData; mimeData->setText(item->text()); QDrag *drag = new QDrag( this ); drag->setMimeData(mimeData); drag->setPixmap(QPixmap( ":/images/person.png" )); //进行拖动操作 if (drag->exec(Qt::MoveAction) == Qt::MoveAction) delete item; } } |
http://blog.csdn.net/emdfans/article/details/41721955
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原文地址:http://www.cnblogs.com/findumars/p/5599427.html