This function trades accuracy for speed, and is usually suitable for this purpose. This particular approach uses the QPoint::manhattanLength() function to get a rough estimate of the distance between where the mouse click occurred and the current cursor position. Qt ::DropAction dropAction = drag - >exec( Qt ::CopyAction | Qt ::MoveAction) If ((event - >pos() - dragStartPosition). If ( !(event - >buttons() & Qt ::LeftButton)) Void DragWidget ::mouseMoveEvent( QMouseEvent *event) However, the simplest way to enable dragging from a widget is to reimplement the widget's mousePressEvent() and start a drag and drop operation: In most applications, it is a good idea to begin a drag and drop operation only after a mouse button has been pressed and the cursor has been moved a certain distance. To start a drag, create a QDrag object, and call its exec() function. For using drag and drop inside a Qt Quick scene, please read the documentation for the Qt Quick Drag, DragEvent, and DropArea items, as well as the Qt Quick Drag and Drop examples. The rest of the document focuses mainly on how to implement drag and drop in C++. These quantities provide sensible default values that are compliant with the underlying windowing system for you to use if you provide drag and drop support in your controls. A value of 0 means that there is no such limit. QStyleHints::startDragVelocity() indicates how fast (in pixels/second) the user has to move the mouse to start a drag.QStyleHints::startDragDistance() indicates how far the user has to move the mouse while holding down a mouse button before the movement will be interpreted as dragging.QStyleHints::startDragTime() describes the amount of time in milliseconds that the user must hold down a mouse button over an object before a drag will begin.The QStyleHints object provides some properties that are related to drag and drop operations: $.Support for MIME-based drag and drop data transferĮvent which is sent to a widget when a drag and drop action enters itĮvent that is sent to a widget when a drag and drop action leaves itĮvent which is sent while a drag and drop action is in progressĮvent which is sent when a drag and drop action is completedĬonverts between a MIME type and a Uniform Type Identifier (UTI) format set a handler to upload the files when the submit button is clicked you should possibly put code in here to clean up afterwards runs after all files have been uploaded or otherwise dealt with this pushes the done() callback into the global mentioned earlier it also fills in the filename so that it's obvious which meta boxes this is just to clone meta boxes for the user to fill in for each file this is the important custom function you need to supply other important parameters related to upload, read the documentation for details Url: 'upload.php', // upload handler, handles each file separately, can also be a function taking the file and returning a url If you want meta boxes to appear for each file, then you need to append the appropriate html on a per file basis to allow the user to fill them in.Ī summary of the code I would suggest is below: var uploads_to_call = // the global to store all the file upload callbacksįallback_id: 'upload_button', // an identifier of a standard file input element, becomes the target of "click" events on the dropzone You also need to store references to the done() functions that are provided to your custom function for each file, so that you can call them later, causing the files to be uploaded. To use the jquery extension you've chosen, you need to take advantage of the beforeSend option, and supply your own function. You should also download and use a later version of jquery than the one bundled with that sample code. You need to download and use the latest version from its project home for this to work. The sample code you have linked to appears to be using, which is written by Weixi Yen.
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