Re: [platform-swt-dev] Mac OS 10.4 Finder drag and drop development

[Randy Hudson <hudsonr@xxxxxxxxxx>]

The timing is not very good.  OS
X 10.4 was only just released.  If something like drag and drop is
broken on previously working software (Eclipse 3.0), it could possibly
be Apple's bug that gets patched in the OS in the coming weeks.
Given that we are already in the 3.1
endgame, I would put efforts somewhere else.

10.4 support is great idea for 3.1.1.

-Randy

Mike Wilson <Mike_Wilson@xxxxxxxxxx>
Sent by: platform-swt-dev-bounces@xxxxxxxxxxx

05/17/2005 02:11 PM

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Subject	Re: [platform-swt-dev] Mac OS 10.4 Finder drag and drop development

10.4 is not a *reference* platform. Given that a significant
portion of 
the Mac community is in the process of upgrading to 10.4, it would be 
silly to not try and make this work. [note: this is not an opportunity
to 
start a discussion of the merits of 10.4 and whether or not you should
upgrade.]

McQ.




Randy Hudson <hudsonr@xxxxxxxxxx> 
Sent by: platform-swt-dev-bounces@xxxxxxxxxxx
05/17/05 10:35
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Re: [platform-swt-dev] Mac OS 10.4 Finder drag and drop development







10.4 is not a supported platform. 
http://www.eclipse.org/eclipse/development/eclipse_project_plan_3_1.html#TargetOperatingEnvironments


-Randy 



Eric Zimmerman <eric@xxxxxxxxxxx> 
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05/16/2005 08:02 PM 

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Subject
[platform-swt-dev] Mac OS 10.4 Finder drag and drop development








Drag and Drop to and from the finder in Mac OS 10.4 does not work 
(Already submitted as a bug).  I have spent the last couple of days
working on a fix but, I seem to be stuck.

I have fixed the drop source capabilities within eclipse by adding type
'furl' to the FileTransfer Class and implementing the correct 
nativeToJava switch to do the processing: (Following the guidelines 
here: http://developer.apple.com/technotes/tn/tn2022.html)

if (transferData.type == FURLID) {
           int encoding = OS.CFStringGetSystemEncoding();
           int count = transferData.data.length;
           String[] fileNames = new String[count];
           for (int i = 0; i < count; i++)
{
               System.out.println("url:
" + new 
String(transferData.data[i]));
               byte[] urlData = transferData.data[i];
               int url = "">
OS.CFURLCreateWithBytes(OS.kCFAllocatorDefault, urlData, urlData.length,
encoding, 0);
               if (url == 0) return
null;
               try {
                   int path
= OS.CFURLCopyFileSystemPath(url, 
OS.kCFURLPOSIXPathStyle);
                   if (path
== 0) return null;
                   try {
                    
  int length = OS.CFStringGetLength(path);
                    
  if (length == 0) return null;
                    
  char[] buffer = new char[length];
                    
  CFRange range = new CFRange();
                    
  range.length = length;
                    
  OS.CFStringGetCharacters(path, range, buffer);
                    
  fileNames[i] = new String(buffer);
                    
  System.out.println("filename: " + fileNames[i]);
                   } finally
{
                    
  OS.CFRelease(path);
                   }
               } finally {
                   OS.CFRelease(url);
               }
           }
           return fileNames;
       }

I had to wrap the CFURLCreateWithBytes native method into the swt-pi 
library in order to accomplish this.

I then figured the issue with drag out was probably the reciprical 
problem so I implemented the javaToNative furl processing:

if (transferData.type == FURLID) {
           System.out.println("Requesting
furlid transfer");
           byte[][] data = "" byte[files.length][];
           for (int i = 0; i < data.length;
i++) {
               File file = new File(files[i]);
               boolean isDirectory =
file.isDirectory();
               String fileName = files[i];
               char[] chars = new char[fileName.length()];
               fileName.getChars(0,
chars.length, chars, 0);
               int cfstring = 
OS.CFStringCreateWithCharacters(OS.kCFAllocatorDefault, chars, 
chars.length);
               if (cfstring == 0) return;
               try {
                   int url
= "">
OS.CFURLCreateWithFileSystemPath(OS.kCFAllocatorDefault, cfstring, 
OS.kCFURLPOSIXPathStyle, isDirectory);
                   if (url
== 0) return;
                   try {
                    
  int encoding = OS.CFStringGetSystemEncoding();
                    
  int theData = 
OS.CFURLCreateData(OS.kCFAllocatorDefault, url, encoding, true);
                    
  if(theData == 0) return;
                    
  try {
                    
      int length = OS.CFDataGetLength(theData);
                    
      byte[] buffer = new byte[length];
                    
      CFRange range = new CFRange();
                    
      range.length = length;
                    
      OS.CFDataGetBytes(theData, range, buffer);
                    
      System.out.println("FURL: " + new 
String(buffer));
                    
      data[i] = buffer;
                    
  } finally {
                    
      OS.CFRelease(theData);
                    
  }
                   } finally
{
                    
  OS.CFRelease(url);
                   }
               } finally {
                   OS.CFRelease(cfstring);
               }
           }
           transferData.data = "">
           transferData.result = 0;
       }

To do this I also needed to wrap CFURLCreateData, CFDataGetLength, and
CFDataGetBytes in the swt-pi library.  This code seems to function
correctly as a dragflavor since it is accepted by most applications 
other than the finder.

Whenever I attempt to drag from my application in the finder I get a 
positive result back from the trackDrag method that should indicate the
finder accepted my drag, but nothing shows up in the finder. :-(

I believe I have done most of the work to make this happen but am just
missing a little step to finish it off.  If anybody can give me some
advice on where to look or something to try I will submit all of my 
wrappers and code that are developed.

Thanks,

Eric
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