These classes allow you to turn any CPView in a Cappuccino app into a file upload drop zone. It supports multiple files dropped at once. It works in Safari and Chrome. Firefox support is possible, but hasn't been added.
The most useful classes are:
- DCFileDropController.j
- DCFileUploadManager.j
- DCFileUpload.j
Import these classes:
@import "DCFileDropController.j"
@import "DCFileUploadManager.j"
Apply a DCFileDropController to any CPView:
var fileDropUploadController = [[DCFileDropController alloc]
initWithView:anyView
dropDelegate:self
uploadURL:[CPURL URLWithString:@"upload.php"]
uploadManager:[DCFileUploadManager sharedManager]];
If you want to change visual state of the view, you can do that with this dropDelegate method:
- (void)fileDropUploadController:(DCFileDropController *)theController setState:(BOOL)visible {
if (visible) {
[theController.view setBackgroundColor:[CPColor colorWithRed:0.0 green:0.0 blue:1.0 alpha:0.2]];
} else {
[theController.view setBackgroundColor:[CPColor clearColor]];
}
}
If you want to display progress, you can set the DCFileUploadManager delegate:
[[DCFileUploadManager sharedManager] setDelegate:uploadsPanel];
And process it with this method:
- (void)fileUploadManagerDidChange:(DCFileUploadManager *)theManager {
var fileUploads = [theManager fileUploads];
}
This technique is based on code from CSS Ninja.