Fwd: Re: [Jsynthlib-devel] incompatible Scene class

[Jeff W. <jww...@ya...>]

Hiroo,

I tried drag & drop for every possible combination of
different window types. It appears to be working fine
now.

Jeff
--- Hiroo Hayashi <hir...@co...> wrote:

> From: Hiroo Hayashi <hir...@co...>
> To: JSynthLib Development
> <jsy...@li...>
> Subject: Re: [Jsynthlib-devel] incompatible Scene
> class
> Date: Tue, 21 Sep 2004 20:29:22 -0500
> 
> Hi,
> 
> Last night I checked in the various change for
> drag&drop (cut&paster,
> TransferHandler/Transferable) related code.
> 
> The most important update is that now we can
> drag&drop Scene and can
> drag&drop Patch and Scene between a LibraryFrame and
> a SceneFrame.  This
> has been a known bug for a long time.
> 
> Hiroo> Jeff> I'm getting the following exception
> when I try to drag
> Hiroo> Jeff> a patch from a bank window to a library
> window. Can
> Hiroo> Jeff> anyone reproduce this?
> Hiroo> 
> Hiroo> Hiroo> Yes, I can.  I guess my bug fix made
> this bug.  I'll take a look.
> 
> I also made a fix for this, but I don't understand
> why the fix is
> necessary.  For example if I drag&drop a Patch from
> a LibraryFrame to
> another LibraryFrame, you will see the following
> debug message if you
> run JSynthLib with debug option ('2').
> 
> DBG>PatchListTransferHandler.createTransferable
> [Roland TD6 Drumkit] f0 41 00 00 3f 12 41 62 00 00
> 41 63 75 53 74 69 .. 02 74 f7
> DBG>Patch.isDataFlavorSupported
>
java.awt.datatransfer.DataFlavor[mimetype=application/x-java-serialized-object;representationclass=[Lcore.IPatch;]
> DBG>Patch.getTransferData:
>
flavor=java.awt.datatransfer.DataFlavor[mimetype=application/x-java-serialized-object;representationclass=[Lcore.IPatch;]
> DBG>Patch.getTransferData: Patch=[Roland TD6
> Drumkit] f0 41 00 00 3f 12 41 62 00 00 41 63 75 53
> 74 69 .. 02 74 f7, MIDI-OX
> DBG>PatchTransferHandler.importData:
>
t=java.awt.dnd.DropTargetContext$TransferableProxy@57828d
> DBG>PatchTransferHandler.importData: Patch=[null] f0
> 41 00 00 3f 12 41 62 00 00 41 63 75 53 74 69 .. 02
> 74 f7MIDI-OX
> 
> This means that the Patch.driver field was set
> properly when
> Patch.getTransferData returns a patch.
> 
> But when PatchTransferHandler.importData receives
> the data, the value of driver
> field becomes 'null'.  Patch.driver field is private
> access now, and
> is set only by Patch.setDriver(IPatchDriver) method.
>  When the argument
> Patch.setDriver() is null, setDriver method sets
> driver field Generic
> Driver.  This means there is no way to set 'null' on
> Patch.driver field.
> 
> Scene also has similar problem.  driver field for a
> Patch in a Scene
> becomes 'null' when it is received by a importData
> method.
> 
> For now I've fixed this bug by adding the following
> code.
>         p.setDriver((IPatchDriver)
> DriverUtil.chooseDriver(p.getByteArray()));
> 
> This is very strange.  I don't understand why this
> line is required.  If
> you have any clue, let me know.
> -- 
> Hiroo Hayashi
> 
> 
> 
>
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