drag-and-drop

问题 I am trying to create a windows form onto which I can drop a file/folder. I have the following code in a WinForms app public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void Form1_DragEnter(object sender, DragEventArgs e) { Debug.Print("DragEnter"); } private void Form1_DragDrop(object sender, DragEventArgs e) { MessageBox.Show("Dropped!"); } } I have set the AllowDrop property to true. I've tried running the application in debug within Visual Studio. Based

问题 I have a WPF TreeView with one level of child items. I am using the HierarchicalDataTemplate for the top-level items, so the child items are bound to a backing data list. When I'm doing dragging and dropping I want to find out where in the target list the new items should go to. I have broken the scenarios down into the following cases: I am on on empty part of the target TreeView I am hovering on or near one of the top-level TreeViewItem s (dropped item must go to the back of the list) I am

问题 I made my own drag and drop functionality. I wanted to do this with a RelativeLayout , but this seems not to work very well. At the beginning i can tell each View I want to drag on which position it should be by setting it below the View before. But when I want to drag a View, all the other Views beneath it are moved too, because they want to keep the order in which I set them. But what other layout can I use for this? I have to use this drag and drop functionality on different screen sizes,

问题 Hi i'm implementing a visual editor where users are allowed to drag images onto the page, and drag other images inside these previously dragged images (kind of 'add another image'). I basically only need the mouse coordinates during the drag: the element hiliting etc... i do with custom functions based on these coordinates. The problem is, while on Webkit I can get them with event.clientX and event.clientY, under Firefox (v.16.0.1 OSX) their 'counterparts' pageX and pageY are always zero in

问题 I currently have some dropdown menus which open on mouse over. I'm implementing some drag-n-drop features using draggable and droppable from jquery ui. It seems that the mouseover events for the menus do not fire when dragging, is there a way to allow them to work? I've implemented it as follows (simplified): $('#some_id').draggable({ helper: 'clone', opacity: 0.35, zIndex: 20000, cursor: 'move' }); $('#some_menu').live('mouseenter click', function(){jThis.find('div').addClass('opened');});

问题 I'm looking for a way to implement both resizing and drag 'n' drop for columns (not rows) within a predefined table using jQuery. I've done a bit of Googling and haven't really found anything that fits the bill as many require you to essentially reconstruct your table using jQuery. I simply want to plug this functionality in, not have my entire table structure dictated by a third-party. Does anyone know of any plugins that might help me to do this, and if not are there any jQuery Gurus out

问题 I am working on drag and drop between two different fragments visible at same time on UI. I want to drag view from one fragment into the other fragment. I am able to drag it between the fragment but what i am facing not good is that i can't listen onDrag on second fragment for the view of first fragment. In Short the OnDragListener on second fragment should listen for the views dragged from first fragment. I have searched alot on google and stackoverflow. Didn't find any answer. Drag and Drop

问题 I think the solution to this is staring me in the face, but I can't seem to find it. So, I'm making a site that has a small file upload section. The upload section will have a place to upload an image for different devices and device orientations (i.e. iPhone, iPad, portrait and landscape). I can easily figure out how to implement the drag & drop on the individual device icons, but if the user misses the drop area, the browser will just navigate to that image on their system. How do I disable

问题 I am looking for a way to allow users to upload Outlook emails to a web-based system in a simple manner. I can get this to work in a manual fashion for the users. They can drag and drop the email from Outlook to their desktop, which creates a .msg file. This works very nicely, esp. if there are attachments in the email which are also stored in the .msg file. This file can then be uploaded using a traditional "input type=file" html field. I would like to simplify this process, if possible. I

问题 I have an NSCollectionView bound to an NSArrayController. I want to get drag and drop working, so I create a delegate and implement the methods -(BOOL)collectionView:(NSCollectionView *)collectionView canDragItemsAtIndexes:(NSIndexSet *)indexes withEvent:(NSEvent*)event -(BOOL)collectionView:(NSCollectionView *)collectionView acceptDrop:(id < NSDraggingInfo >)draggingInfo index:(NSInteger)index dropOperation:(NSCollectionViewDropOperation)dropOperation -(NSDragOperation)collectionView: