http://imagej.273.s1.nabble.com/dragging-an-big-image-tp3691912p3691917.html
> Hello mailing list readers.
>
> Thank you for your help respectively interest. I implemented the
> thread, which watches if the user is dragging the image, but I
> cannot find the right command in imagej to move the image.
>
> I added the functionality explained in my first mail and now I need
> the basic functionality, that the scrolling tool(hand) normally has
> in imagej. Is there a way to call this functionality explicitly?
>
> @Prodanov Dimiter: I have to ask my employer, if I can give you the
> source files. I will write you soon...
>
> Kind regards, Michael
>
>
>
> -------- Original-Nachricht --------
>> Datum: Mon, 22 Jun 2009 18:18:30 +0200
>> Von: Michael Schmid <
[hidden email]>
>> An:
[hidden email]
>> Betreff: Re: dragging an big image
>
>> Hi Michael,
>>
>> you need a listener to 'mouse dragged' events and a second background
>> thread that moves the image and loads the missing parts (interface
>> Runnable).
>> Here is a rough concept:
>>
>> public class LargeImageViewer implements MouseListener,
>> MouseMotionListener, Runnable {
>> //Class vars
>> x0, y0; //position of mouse down
>> deltaX, deltaY; //how much the image has been dragged
>> Thread backgroundThread;
>>
>> in constructor (or setup if plugin):
>> get foreground image, get canvas thereof
>> canvas.addMouseListener(this);
>> canvas.addMouseMotionListener(this);
>>
>> destructor, mouseReleased, close or whereever:
>> canvas.removeMouseListener(this);
>> canvas.removeMouseMotionListener(this);
>>
>> public void MouseDragged(MouseEvent e) {
>> deltaX = e.getX()-x0;
>> deltaY = e.getY()-y0;
>> synchronized(this) {notify();}
>> }
>>
>> public void mousePressed ...
>> record x0, y0
>> backgroundThread = new Thread(this, "ImageDragger");
>> backgroundThread.start();
>>
>>
>> public void mouseReleased ...
>> backgroundThread.interrupt();
>>
>> public void run() {
>> while (true) { //i.e., while mouse down
>> update display(deltaX, deltaY);
>> synchronized(this) {
>> try {wait();}
>> catch(InterruptedException) {return;}
>> }
>> }
>> }
>>
>> Michael
>> ________________________________________________________________
>>
>> On 22 Jun 2009, at 16:49, Michael Strupp wrote:
>>
>>> Hello ImageJ community
>>>
>>> I'm writing a plugin for imagej, to view some images that are much
>>> larger than the windowsize and the RAM. The plugin only loads the
>>> parts of the image which are currently displayed in the viewer. I
>>> overwrote the drag tool from imagej to navigate, so I can see all
>>> parts of the image, which get loaded after the user navigated.
>>> This all works fine so far, but now I want to improve the usability
>>> of the plugin. The problem is, that the image does not move while
>>> the user drags the image, instead it waits some seconds and then
>>> the new image part gets shown.
>>>
>>> I hope some people here have experience with such a problem.
>>>
>>> Kind regards,
>>> Michael
>
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