Take a look at the MultiPhotoFrame sample source: http://developer.apple.com/library/mac/#samplecode/MultiPhotoFrame/Introduc tion/Intro.html
The dragged images are animated as they enter/exit views by tracking the mouse using this NSDraggingSource Protocol method: - (void)draggingSession:(NSDraggingSession *)session movedToPoint:(NSPoint)screenPoint Also, check out the following WWDC 2011 video. It explains how to change "drag images in flight." https://developer.apple.com/videos/wwdc/2011/?id=115 I'm writing similar code at the moment. Chuck On 3/6/13 11:28 PM, "Muthulingam Ammaiappan" <muthulinga...@gmail.com> wrote: >Hi Friends, > >i had developed the custom list view which is having NSView as a cell with >variable sizes to represent the video clips in the timeline. > >and i had implemented the drag and drop for reordering functionality... >that is working as per the expectation... > >but i wanted to add the animation while doing the drag and drop like in >"iPhoto"... > >(when user drag the item if the mouse co-ords enters the in between region >then the corresponding elements will animate... and animation will end and >it comeback its original position once the mouse left the coords).... > >here i am including the drag and drop code.... please help me how i can >implement the above mentioned animation while doing drag and drop... > > >Thanks & Regards, >Muthu > > > > >- (NSDragOperation)draggingEntered:(id <NSDraggingInfo>)sender > >{ > >NSDragOperation theOperation = NSDragOperationNone; > > self.highlightForDragAcceptance = YES; > > > >BOOL dropHighlight = _highlightForDragAcceptance; > > > > > > downLocation = [self convertPoint: [sender draggingLocation] >fromView: >[self superview]]; > > > > > > > > dropindex = [self indexOfCellAtPoint:downLocation]; > > > > > > theOperation = [timelineViewController validateDrop:sender proposedCell: >dropindex > > proposedDropHighlight: dropHighlight]; > > > > > return theOperation; > >} > > >- (NSDragOperation)draggingUpdated:(id <NSDraggingInfo>)sender > >{ > >NSDragOperation theOperation = NSDragOperationNone; > > self.highlightForDragAcceptance = YES; > > > > BOOL dropHighlight = _highlightForDragAcceptance; > > > > currentLocation = [self convertPoint: [sender draggingLocation] >fromView: >[self superview]]; > > > > > > > NSUInteger _numberOfCells = [[timelineViewController collection] >count]; > > NSArray * sprites = [timelineViewController collection]; > > > > > > > > dropindex = [self indexOfCellAtPoint:currentLocation]; > > > > > > > > theOperation = [timelineViewController validateDrop:sender >proposedCell: >dropindex > > proposedDropHighlight: dropHighlight]; > > > > > >return theOperation; > >} > > > >- (void)draggingExited:(id <NSDraggingInfo>)sender > >{ > >#pragma unused(sender) > > > > self.highlightForDragAcceptance = NO; > >} > > >- (BOOL)prepareForDragOperation:(id<NSDraggingInfo>)sender > >{ > > sender.animatesToDestination = YES; > > > >return YES; > >} > > > >- (BOOL)performDragOperation:(id <NSDraggingInfo>)sender > >{ > > BOOL highlight = _highlightForDragAcceptance; > > > > > > > >BOOL accepted = [timelineViewController acceptDrop:sender cellindex: >dropindex dropHighlight:highlight]; > > self.highlightForDragAcceptance = NO; > > > >return accepted; > >} > > > >- (void)concludeDragOperation:(id <NSDraggingInfo>)sender > >{ > >#pragma unused(sender) > >} > > > >- (void)draggingEnded:(id <NSDraggingInfo>)sender > >{ > >#pragma unused(sender) > > self.highlightForDragAcceptance = NO; > > [self deselectSelectedObjects]; > >} > > > > >- (BOOL)wantsPeriodicDraggingUpdates > >{ > >return YES; > >} > > > > >- (BOOL)writeCellsWithIndexes:(NSIndexSet*)indexes toPasteboard:( >NSPasteboard *)dragPasteboard > >{ > > [dragPasteboard declareTypes: [NSArray arrayWithObjects: >NSStringPboardType, nil] owner: self]; > >[dragPasteboard setString: @"Just Testing" forType: NSStringPboardType]; > > return YES; > > >} > > >- (NSDragOperation)validateDrop:(id <NSDraggingInfo>)info proposedCell:( >NSUInteger)index > > proposedDropHighlight:(BOOL)dropHighlight; > >{ > >return NSDragOperationCopy; > >} > > >- (BOOL)acceptDrop:(id <NSDraggingInfo>)info cellindex:(NSUInteger)index >dropHighlight:(BOOL)dropHighlight > >{ > > NSLog(@"Accept Drop"); > > NSLog(@"selection index:%i",[spritesController selectionIndex]); > > NSLog(@"drop index:%i",index); > > > > MVSprite *temp = [collection objectAtIndex: [spritesController >selectionIndex]]; > > > > [spritesController >removeObjectAtArrangedObjectIndex:[spritesController >selectionIndex]]; > > [spritesController insertObject:temp atArrangedObjectIndex:index]; > > > > > > > > NSArray * sprites = [self collection]; > > > int count = [sprites count]; > > > > >//layout the subviews > > > for (int i=0; i<count; i++) > > { > > MVSprite * current = [sprites objectAtIndex:i]; > > if(i == 0) > > { > > current.start = 0; > > current.end = current.start + current.duration; > > [current setAnimate:YES]; > > [current.spriteView setSpriteViewFrame]; > > > > }else{ > > MVSprite * previous = [sprites objectAtIndex:i-1]; > > > > current.start = previous.end; > > current.end = current.start + current.duration; > > [current setAnimate:YES]; > > [current.spriteView setSpriteViewFrame]; > > > > } > > > > } > >} >_______________________________________________ > >Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) > >Please do not post admin requests or moderator comments to the list. >Contact the moderators at cocoa-dev-admins(at)lists.apple.com > >Help/Unsubscribe/Update your Subscription: >https://lists.apple.com/mailman/options/cocoa-dev/chucks%40veladg.com > >This email sent to chu...@veladg.com _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. 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