Re: Drag and Drop Problems

• Subject: Re: Drag and Drop Problems
• From: Scott Adler <email@hidden>
• Date: Wed, 31 Mar 2004 18:53:49 -0800

I figured out my problem. The javadoc fro dragOver(DragSourceDragEvent dsde) says that getLocation() returns screen coordinates. This is what gets returned on Windows, while the Mac returns a point in the containing window's coordinate system. This is a bug, I think.

if fixed with the following code:

Point locPt = new Point(dsde.getLocation());

if (isMacintosh)
{
locPt = SwingUtilities.convertPoint(SwingUtilities.getWindowAncestor(this), locPt, this);
}
else
{
SwingUtilities.convertPointFromScreen(locPt, this);
}





Timothy Wall wrote:

My biggest issue is that it hangs at seemingly random points in the drag, eventually coming back after five minutes or so.

I have several automated drag/drop tests that have to be left out of the automated test suite, since they tend to lock up the test run. And this is with a bare minimum D&D implementation with nothing else being done.

On Mar 31, 2004, at 3:19 PM, Tom Condon wrote:

It turns out to be 24 pixels.

Drag and Drop really needs a lot of work on OS X Java. I does not
behave at all like it does on Windows.

I never get my dragExit() method called until I release the mouse.

It does not seem to let me change the cursor to the one I want.

You would think that something as important to the Mac UI as DnD would
be a bigger priority at Apple for Java. It does not seem well
implemented or tested. I hope someone is listening....

I am very frustrated that I have to turn my PC to do development.
GGGrrrrrrrrrr.





Greg Guerin wrote:

Tom Condon <email@hidden> wrote:

In my dragOver() method I get the
position of the event and print it out to standard out after using
SwingUtilities.convertPointFromScreen(). The y value of the point seems to
be off by
about 20 pixels.

Maybe it's a coincidence or maybe it's a clue, but "about 20 pixels" is the
height of a Frame/JFrame's title bar. I forget whether this is reflected
in the Frame's insets or not.

-- GG
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