C++ QDragEnterEvent类代码示例

bool FormFile::eventFilter(QObject *watched, QEvent *event)
{
    if(watched == ui->lvServer)
    {
        if(event->type() == QEvent::DragEnter)
        {
            QDragEnterEvent* dee = dynamic_cast<QDragEnterEvent*>(event);
            dee->acceptProposedAction();
            return true;
        }
        else if(event->type() == QEvent::Drop)
        {
            QDropEvent* de = dynamic_cast<QDropEvent*>(event);
            QList<QUrl>urls = de->mimeData()->urls();
            if(urls.isEmpty())
            {
                return true;
            }
            QString path = urls.first().toLocalFile();
            //上传文件
            updateFile(path, path.split("/").last());
            return true;
        }
    }

    return QWidget::eventFilter(watched, event);
}

bool DockedMdiArea::event(QEvent *event)
{
    // Listen for desktop file manager drop and emit a signal once a file is
    // dropped.
    switch (event->type()) {
    case QEvent::DragEnter: {
        QDragEnterEvent *e = static_cast<QDragEnterEvent*>(event);
        if (!uiFiles(e->mimeData()).empty()) {
            e->acceptProposedAction();
            return true;
        }
    }
        break;
    case QEvent::Drop: {
        QDropEvent *e = static_cast<QDropEvent*>(event);
        const QStringList files = uiFiles(e->mimeData());
        const QStringList::const_iterator cend = files.constEnd();
        for (QStringList::const_iterator it = files.constBegin(); it != cend; ++it) {
            emit fileDropped(*it);
        }
        e->acceptProposedAction();
        return true;
    }
        break;
    default:
        break;
    }
    return QMdiArea::event(event);
}

// Eventfilter: Only needed under Windows.
// Without this, files dropped in the line edit have URL-encoding.
// This eventfilter decodes the filenames as needed by KDiff3.
bool OpenDialog::eventFilter(QObject* o, QEvent* e)
{
   if ( e->type()==QEvent::DragEnter )
   {
      QDragEnterEvent* d = static_cast<QDragEnterEvent*>(e);
      d->setAccepted( d->mimeData()->hasUrls() );
      return true;
   }
   if (e->type()==QEvent::Drop)
   {
      QDropEvent* d = static_cast<QDropEvent*>(e);

      if ( !d->mimeData()->hasUrls() )
         return false;

      QList<QUrl> lst = d->mimeData()->urls();

      if ( lst.count() > 0 )
      {
         static_cast<QLineEdit*>(o)->setText( QDir::toNativeSeparators( lst[0].toLocalFile() ) );
         static_cast<QLineEdit*>(o)->setFocus();
      }
       
      return true;
   }
   return false;
}

bool QDesignerToolBar::eventFilter( QObject *o, QEvent *e )
{
    if ( !o || !e || o->inherits( "QDockWindowHandle" ) || o->inherits( "QDockWindowTitleBar" ) )
	return QToolBar::eventFilter( o, e );

    if ( o == this && e->type() == QEvent::MouseButtonPress &&
	 ( ( QMouseEvent*)e )->button() == LeftButton ) {
	mousePressEvent( (QMouseEvent*)e );
	return TRUE;
    }

    if ( o == this )
	return QToolBar::eventFilter( o, e );

    if ( e->type() == QEvent::MouseButtonPress ) {
	QMouseEvent *ke = (QMouseEvent*)e;
	fixObject( o );
	if ( !o )
	    return FALSE;
	buttonMousePressEvent( ke, o );
	return TRUE;
    } else if(e->type() == QEvent::ContextMenu ) {
	QContextMenuEvent *ce = (QContextMenuEvent*)e;
	fixObject( o );
	if( !o )
	    return FALSE;
	buttonContextMenuEvent( ce, o );
	return TRUE;
    } else if ( e->type() == QEvent::MouseMove ) {
	QMouseEvent *ke = (QMouseEvent*)e;
	fixObject( o );
	if ( !o )
	    return FALSE;
	buttonMouseMoveEvent( ke, o );
	return TRUE;
    } else if ( e->type() == QEvent::MouseButtonRelease ) {
	QMouseEvent *ke = (QMouseEvent*)e;
	fixObject( o );
	if ( !o )
	    return FALSE;
	buttonMouseReleaseEvent( ke, o );
	return TRUE;
    } else if ( e->type() == QEvent::DragEnter ) {
	QDragEnterEvent *de = (QDragEnterEvent*)e;
	if ( de->provides( "application/x-designer-actions" ) ||
	     de->provides( "application/x-designer-actiongroup" ) ||
	     de->provides( "application/x-designer-separator" ) )
	    de->accept();
    } else if ( e->type() == QEvent::DragMove ) {
	QDragMoveEvent *de = (QDragMoveEvent*)e;
	if ( de->provides( "application/x-designer-actions" ) ||
	     de->provides( "application/x-designer-actiongroup" ) ||
	     de->provides( "application/x-designer-separator" ) )
	    de->accept();
    }

    return QToolBar::eventFilter( o, e );
}

bool CloudView::eventFilter(QObject *obj, QEvent *event)
{
    if (obj == mHeader) {
        static QPoint oldPos;
        if (event->type() == QEvent::MouseButtonPress) {
            QMouseEvent *ev = (QMouseEvent *)event;
            oldPos = ev->globalPos();

            return true;

        } else if (event->type() == QEvent::MouseMove) {
            QMouseEvent *ev = (QMouseEvent *)event;
            const QPoint delta = ev->globalPos() - oldPos;

            MainWindow *win = seafApplet->mainWindow();
            win->move(win->x() + delta.x(), win->y() + delta.y());

            oldPos = ev->globalPos();
            return true;
        }

    } else if (obj == mDropArea) {
        if (event->type() == QEvent::DragEnter) {
            QDragEnterEvent *ev = (QDragEnterEvent *)event;
            if (ev->mimeData()->hasUrls() && ev->mimeData()->urls().size() == 1) {
                const QUrl url = ev->mimeData()->urls().at(0);
                if (url.scheme() == "file") {
                    QString path = url.toLocalFile();
#if defined(Q_OS_MAC) && (QT_VERSION <= QT_VERSION_CHECK(5, 4, 0))
                    path = utils::mac::fix_file_id_url(path);
#endif
                    if (QFileInfo(path).isDir()) {
                        ev->acceptProposedAction();
                    }
                }
            }
            return true;
        } else if (event->type() == QEvent::Drop) {
            QDropEvent *ev = (QDropEvent *)event;
            const QUrl url = ev->mimeData()->urls().at(0);
            QString path = url.toLocalFile();
#if defined(Q_OS_MAC) && (QT_VERSION <= QT_VERSION_CHECK(5, 4, 0))
            path = utils::mac::fix_file_id_url(path);
#endif
            ev->setDropAction(Qt::CopyAction);
            ev->accept();
            showCreateRepoDialog(path);
            return true;
        }
    }

    return QWidget::eventFilter(obj, event);
}

bool MainWindow::eventFilter(QObject *object, QEvent *event)
{
    if (event->type() == QEvent::DragEnter)
    {
        QDragEnterEvent *dragEvent = (QDragEnterEvent*)event;
        // accept only folders
        QList<QUrl> urls = dragEvent->mimeData()->urls();
        for (const QUrl url: urls)
        {
            if (url.isLocalFile())
            {
                QFileInfo info(url.toLocalFile());

                if (info.isFile())
                {
                    return false;
                }
            }
        }
        dragEvent->setDropAction(Qt::LinkAction);
        dragEvent->acceptProposedAction();

        return true;
    }
    else if (event->type() == QEvent::Drop)
    {
        QList<QUrl> urls = ((QDropEvent*)event)->mimeData()->urls();
        QStringList files;

        for (const QUrl url: urls)
        {
            if (url.isLocalFile())
            {
                QFileInfo info(url.toLocalFile());

                if (info.isFile())
                    files.append(url.toLocalFile());
                else if (info.isDir())
                    filesList->addFolder(info.absoluteFilePath());
            }
        }

        filesList->addFiles(files);

        return true;
    }

    return QMainWindow::eventFilter(object, event);
}

bool KDMUsersWidget::eventFilter( QObject *, QEvent *e )
{
	if (e->type() == QEvent::DragEnter) {
		QDragEnterEvent *ee = (QDragEnterEvent *)e;
		ee->setAccepted( K3URLDrag::canDecode( ee ) );
		return true;
	}

	if (e->type() == QEvent::Drop) {
		userButtonDropEvent( (QDropEvent *)e );
		return true;
	}

	return false;
}

bool ContextHelp::eventFilter( QObject * watched, QEvent * e )
{
// 	kDebug() << k_funcinfo << "watched="<<watched<<endl;
	
	if ( (watched != m_pEditor) && (watched != m_pEditor->editorViewport()) )
		return false;
	
	switch ( e->type() )
	{
		case QEvent::DragEnter:
		{
			QDragEnterEvent * dragEnter = static_cast<QDragEnterEvent*>(e);
			
			if ( !QString( dragEnter->format() ).startsWith("ktechlab/") )
				break;
			
			dragEnter->acceptAction();
			return true;
		}
			
		case QEvent::Drop:
		{
			QDropEvent * dropEvent = static_cast<QDropEvent*>(e);
			
			if ( !QString( dropEvent->format() ).startsWith("ktechlab/") )
				break;
			
			dropEvent->accept();
			
			QString type;
			QDataStream stream( dropEvent->encodedData( dropEvent->format() ) /*, IO_ReadOnly */ );
			stream >> type;
			
			LibraryItem * li = itemLibrary()->libraryItem( type );
			if ( !li )
				return true;
			
			m_pEditor->insertURL( "ktechlab-help:///" + type, li->name() );
			return true;
		}
			
		default:
			break;
	}
	
	return false;
}

bool CloudView::eventFilter(QObject *obj, QEvent *event)
{
    if (obj == mHeader) {
        static QPoint oldPos;
        if (event->type() == QEvent::MouseButtonPress) {
            QMouseEvent *ev = (QMouseEvent *)event;
            oldPos = ev->globalPos();

            return true;

        } else if (event->type() == QEvent::MouseMove) {
            QMouseEvent *ev = (QMouseEvent *)event;
            const QPoint delta = ev->globalPos() - oldPos;

            MainWindow *win = seafApplet->mainWindow();
            win->move(win->x() + delta.x(), win->y() + delta.y());

            oldPos = ev->globalPos();
            return true;
        }

    } else if (obj == mDropArea) {
        if (event->type() == QEvent::DragEnter) {
            QDragEnterEvent *ev = (QDragEnterEvent *)event;
            if (ev->mimeData()->hasUrls() && ev->mimeData()->urls().size() == 1) {
                const QUrl url = ev->mimeData()->urls().at(0);
                if (url.isLocalFile()) {
                    QString path = url.toLocalFile();
                    if (QFileInfo(path).isDir()) {
                        ev->acceptProposedAction();
                    }
                }
            }
            return true;
        } else if (event->type() == QEvent::Drop) {
            QDropEvent *ev = (QDropEvent *)event;
            const QUrl url = ev->mimeData()->urls().at(0);
            QString path = url.toLocalFile();
            showCreateRepoDialog(path);
            return true;
        }
    }

    return QWidget::eventFilter(obj, event);
}

bool SessionListWidget::event(QEvent *event)
{
#ifndef QUTIM_MOBILE_UI
	if (event->type() == QEvent::ToolTip) {
		if (QHelpEvent *help = static_cast<QHelpEvent*>(event)) {
			int index = indexAt(help->pos()).row();
			if (index != -1) {
				ChatUnit *unit = session(index)->getUnit();
				ToolTip::instance()->showText(help->globalPos(), unit, this);
				return true;
			}
		}
	} else if (event->type() == QEvent::DragEnter) {
		QDragEnterEvent *dragEvent = static_cast<QDragEnterEvent*>(event);
		if (const MimeObjectData *data = qobject_cast<const MimeObjectData*>(dragEvent->mimeData())) {
			ChatUnit *u = qobject_cast<ChatUnit*>(data->object());
			if (u)
				dragEvent->acceptProposedAction();
		}
		return true;
	} else if (event->type() == QEvent::Drop) {
		QDropEvent *dropEvent = static_cast<QDropEvent*>(event);
		if (const MimeObjectData *mimeData
				= qobject_cast<const MimeObjectData*>(dropEvent->mimeData())) {
			if (ChatUnit *u = qobject_cast<ChatUnit*>(mimeData->object())) {
				ChatLayerImpl::get(u,true)->activate();
				dropEvent->setDropAction(Qt::CopyAction);
				dropEvent->accept();
				return true;
			}
		}
	} else 
#endif
	if (event->type() == QEvent::ContextMenu) {
		QContextMenuEvent *ev = static_cast<QContextMenuEvent*>(event);
		ChatSessionImpl *s = session(row(itemAt(ev->pos())));
		if(s) {
			s->unit()->showMenu(ev->globalPos());
			return true;
		}

	}
	return QListWidget::event(event);
}

bool EditTagDialog::eventFilter(QObject* o, QEvent* e) {
  if (o == ui_->art) {
    switch (e->type()) {
      case QEvent::MouseButtonRelease:
        cover_menu_->popup(static_cast<QMouseEvent*>(e)->globalPos());
        break;

      case QEvent::DragEnter: {
        QDragEnterEvent* event = static_cast<QDragEnterEvent*>(e);
        if (AlbumCoverChoiceController::CanAcceptDrag(event)) {
          event->acceptProposedAction();
        }
        break;
      }

      case QEvent::Drop: {
        const QDropEvent* event = static_cast<QDropEvent*>(e);
        const QModelIndexList sel =
            ui_->song_list->selectionModel()->selectedIndexes();
        Song* song = GetFirstSelected();

        const QString cover =
            album_cover_choice_controller_->SaveCover(song, event);
        if (!cover.isEmpty()) {
          UpdateCoverOf(*song, sel, cover);
        }

        break;
      }

      default:
        break;
    }
  }
  return false;
}

bool ClassSpaceChecker::eventFilter(QObject *object, QEvent *evt)
{
	if(evt->type() == QEvent::FocusOut) 
	{
		if(object == ui.tableWidgetResult)
		{
			ui.lineEdit_Result->setText(prevTotalResultStr_);
		}
		return QMainWindow::eventFilter(object, evt);
	}

	if(object == ui.comboBox_JarFile 
		|| object == ui.lineEdit_MapFile
		) 
	{
		if(evt->type() == QEvent::DragEnter)
		{
			QDragEnterEvent *e = (QDragEnterEvent*)evt;
			const QMimeData *mimeData = e->mimeData();
			if (mimeData->hasUrls())
			{
				int cnt = 0;
				QList<QUrl> urlList = mimeData->urls();
				for (int i = 0; i < urlList.size(); ++i)
				{
					QString path = urlList.at(i).toLocalFile();
					if( !QFileInfo(path).isFile() )
						continue;

					if(path.indexOf(".jar", 0, Qt::CaseInsensitive) < 0 
						&& path.indexOf(".zip", 0, Qt::CaseInsensitive) < 0
						&& path.indexOf(".txt", 0, Qt::CaseInsensitive) < 0
						)
						continue;

					if(urlList.size() == 1) 
					{
						if(object == ui.comboBox_JarFile)
						{
							if(path.indexOf(".jar", 0, Qt::CaseInsensitive) < 0 
								&& path.indexOf(".zip", 0, Qt::CaseInsensitive) < 0
								)
								continue;
						}
						else if(object == ui.lineEdit_MapFile)
						{
							if(path.indexOf(".txt", 0, Qt::CaseInsensitive) < 0)
								continue;
						}
					}

					cnt++;
				}
				if( cnt > 0 )
					e->acceptProposedAction();
			}
			qDebug() << evt << mimeData->text();
		}
		else if(evt->type() == QEvent::DragLeave)
		{
			QDragLeaveEvent *e = (QDragLeaveEvent*)evt;
			e->accept();
		}
		else if(evt->type() == QEvent::DragMove)
		{
			QDragMoveEvent *e = (QDragMoveEvent*)evt;
			e->acceptProposedAction();
		}
		else if(evt->type() == QEvent::Drop)
		{
			QDropEvent *e = (QDropEvent*)evt;
			const QMimeData* mimeData = e->mimeData();

			if (mimeData->hasUrls())
			{
				QList<QUrl> urlList = mimeData->urls();

				for (int i = 0; i < urlList.size(); ++i)
				{
					QString path = urlList.at(i).toLocalFile();

					if(path.indexOf(".txt", 0, Qt::CaseInsensitive) >= 0)
						ui.lineEdit_MapFile->setText(path);
					if(path.indexOf(".jar", 0, Qt::CaseInsensitive) >= 0 || path.indexOf(".zip", 0, Qt::CaseInsensitive) >= 0)
					{
						checkAndJarFilePreset(path);
					}
				}
			}
		}
	}
	return QMainWindow::eventFilter(object, evt);
}

bool
PlayerWidget::eventFilter(QObject *object, QEvent *event)
{
	if(object == m_layeredWidget) {
		if(event->type() == QEvent::DragEnter) {
			QDragEnterEvent *dragEnterEvent = static_cast<QDragEnterEvent *>(event);
			KUrl::List urls = KUrl::List::fromMimeData(dragEnterEvent->mimeData());
			if(!urls.isEmpty())
				dragEnterEvent->accept();
			else
				dragEnterEvent->ignore();
			return true;
		} else if(event->type() == QEvent::DragMove) {
			return true;            // eat event
		} else if(event->type() == QEvent::Drop) {
			QDropEvent *dropEvent = static_cast<QDropEvent *>(event);

			KUrl::List urls = KUrl::List::fromMimeData(dropEvent->mimeData());
			if(!urls.isEmpty()) {
				for(KUrl::List::ConstIterator it = urls.begin(), end = urls.end(); it != end; ++it) {
					const KUrl &url = *it;

					if(url.protocol() != "file")
						continue;

					app()->openVideo(url);
					break;
				}
			}

			return true;            // eat event
		} else if(event->type() == QEvent::KeyPress) {
			// NOTE: when on full screen mode, the keyboard input is received but
			// for some reason it doesn't trigger the correct actions automatically
			// so we process the event and handle the issue ourselves.

			QKeyEvent *keyEvent = static_cast<QKeyEvent *>(event);
			return app()->triggerAction(QKeySequence((keyEvent->modifiers() & ~Qt::KeypadModifier) + keyEvent->key()));
		} else if(event->type() == QEvent::MouseMove) {
			QMouseEvent *mouseEvent = static_cast<QMouseEvent *>(event);
			if(mouseEvent->globalPos() != m_currentCursorPos) {
				m_currentCursorPos = mouseEvent->globalPos();
				if(m_layeredWidget->cursor().shape() == Qt::BlankCursor)
					m_layeredWidget->unsetCursor();
				if(m_fullScreenControls->isAttached())
					m_fullScreenControls->toggleVisible(true);
			}
		}
	} else if(object == m_infoControlsGroupBox || object->parent() == m_infoControlsGroupBox) {
		if(event->type() != QEvent::MouseButtonRelease)
			return QWidget::eventFilter(object, event);

		QMouseEvent *mouseEvent = static_cast<QMouseEvent *>(event);

		if(mouseEvent->button() != Qt::RightButton)
			return QWidget::eventFilter(object, event);

		KMenu menu;
		QAction *action = menu.addAction(i18n("Show editable position control"));
		action->setCheckable(true);
		action->setChecked(app()->playerConfig()->showPositionTimeEdit());

		if(menu.exec(mouseEvent->globalPos()) == action)
			app()->playerConfig()->toggleShowPositionTimeEdit();

		return true;                    // eat event
	}

	return QWidget::eventFilter(object, event);
}

bool MainWindow::eventFilter(QObject *watched, QEvent *event)
{
    switch (event->type())
    {
        case QEvent::KeyRelease:
        {
            QKeyEvent *keyEvent = static_cast<QKeyEvent*>(event);
            //int mask = Qt::ControlModifier | Qt::ShiftModifier | Qt::AltModifier;

            //if(keyEvent->modifiers() == mask)
            //{
            //}

            break;
        }
        case QEvent::DragEnter:
        {


            QDragEnterEvent *dragEnterEvent = static_cast<QDragEnterEvent*>(event);
            const QMimeData* mimeData = dragEnterEvent->mimeData();

            // check for our needed mime type, here a file or a list of files
            if (!mimeData->hasUrls())
                break;

            QList<QUrl> urlList = mimeData->urls();

            for (int i = 0; i < urlList.size(); ++i)
            {
                qDebug() << urlList.at(i).toString();
                if (urlList.at(i).toString().endsWith(".torrent"))
                {
                    dragEnterEvent->acceptProposedAction();
                    return true;
                }
            }

            break;
        }
        case QEvent::Drop:
        {
            QDropEvent *dropEvent = static_cast<QDropEvent*>(event);
            const QMimeData* mimeData = dropEvent->mimeData();

            // check for our needed mime type, here a file or a list of files
            if (!mimeData->hasUrls())
                break;

            QStringList pathList;
            QList<QUrl> urlList = mimeData->urls();

            // extract the local paths of the files
            for (int i = 0; i < urlList.size(); ++i)
            {
                pathList.append(urlList.at(i).toLocalFile());
            }

            //addTorrents(pathList);
            return true;
        }
        default:
            break;
    }

    return QObject::eventFilter(watched, event);
}

bool HashBox::eventFilter(QObject* object, QEvent* event)
{
	if (object == dropWidget) {
		if (event->type() == QEvent::DragEnter) {
			QDragEnterEvent* dragEnterEvent = static_cast<QDragEnterEvent*>(event);
			if (dragEnterEvent) {
				/* print out mimeType */
				showFormats("HashBox::dragEnterEvent", dragEnterEvent->mimeData()->formats());

				if (dragEnterEvent->mimeData()->hasUrls()) {
					std::cerr << "HashBox::dragEnterEvent() Accepting Urls" << std::endl;
					dragEnterEvent->acceptProposedAction();
				} else {
					std::cerr << "HashBox::dragEnterEvent() No Urls" << std::endl;
				}
			}
		} else if (event->type() == QEvent::Drop) {
			QDropEvent* dropEvent = static_cast<QDropEvent*>(event);
			if (dropEvent) {
				if (Qt::CopyAction & dropEvent->possibleActions()) {
					/* print out mimeType */
					showFormats("HashBox::dropEvent", dropEvent->mimeData()->formats());

					QStringList files;

					if (dropEvent->mimeData()->hasUrls()) {
						std::cerr << "HashBox::dropEvent() Urls:" << std::endl;

						QList<QUrl> urls = dropEvent->mimeData()->urls();
						QList<QUrl>::iterator uit;
						for (uit = urls.begin(); uit != urls.end(); ++uit) {
							QString localpath = uit->toLocalFile();
							std::cerr << "Whole URL: " << uit->toString().toStdString() << std::endl;
							std::cerr << "or As Local File: " << localpath.toStdString() << std::endl;

							if (localpath.isEmpty() == false) {
								//Check that the file does exist and is not a directory
								QDir dir(localpath);
								if (dir.exists()) {
									std::cerr << "HashBox::dropEvent() directory not accepted." << std::endl;
									QMessageBox mb(tr("Drop file error."), tr("Directory can't be dropped, only files are accepted."), QMessageBox::Information, QMessageBox::Ok, 0, 0, this);
									mb.exec();
								} else if (QFile::exists(localpath)) {
									files.push_back(localpath);
								} else {
									std::cerr << "HashBox::dropEvent() file does not exists."<< std::endl;
									QMessageBox mb(tr("Drop file error."), tr("File not found or file name not accepted."), QMessageBox::Information, QMessageBox::Ok, 0, 0, this);
									mb.exec();
								}
							}
						}
					}

					addAttachments(files,mDefaultTransferFlags);

					dropEvent->setDropAction(Qt::CopyAction);
					dropEvent->accept();
				} else {
					std::cerr << "HashBox::dropEvent() Rejecting uncopyable DropAction" << std::endl;
				}
			}
		}
	}
	// pass the event on to the parent class
	return QScrollArea::eventFilter(object, event);
}