Sumir
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Swing JViewport and zooming
I am using a JScrollPane to display some graphical objects for my application. I'm trying to allow the ability to zoom in and out. I decided to use the JViewport class but I can't seem to figure out which methods to use, or how to do it. The web had nothing on this topic. I bought an advanced Swing book, but it hasn't arrived yet. HELPPPPP!!!!!
Has anyone done this before? Any help would be greatly appreciated
Has anyone done this before? Any help would be greatly appreciated
ASKER
Thanks yongsing, but I really do not want to increase the size of each object on my panel when I am trying to zoom. It is like looking at a cell under a microscope. When you want to zoom in you don't expand the cell, you expand your view of the cell.
That is why I want to use the JViewport class, but I can't seem to get it to work. Has anyone used it successfully?
That is why I want to use the JViewport class, but I can't seem to get it to work. Has anyone used it successfully?
I don't think JViewport is designed for zooming.
It merely provides a window onto a larger canvas, it provides no support for zooming in or out of that canvas.
To implement what you want you will need to develop your own class.
It merely provides a window onto a larger canvas, it provides no support for zooming in or out of that canvas.
To implement what you want you will need to develop your own class.
ASKER
objects,
Your comment is very insightful. No wonder I couldn't get it to do zooming. So do you suggest any way I can do the zooming?
Your comment is very insightful. No wonder I couldn't get it to do zooming. So do you suggest any way I can do the zooming?
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Hi Sumir,
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You've requested to delete this question, but its status has remained as 'Pending Delete' because one or more comments have been added. Normally, the only way to fully delete such a Question is to post a message to Community Support and ask for assistance.
EE is making a one-time database sweep to purge the Pending Delete Questions automatically. During this sweep:
Sumir -- To allow the deletion to proceed: Do nothing.
EXPERTS -- Please DON'T POST a comment except to contest this deletion.
In the future, please refer to https://www.experts-exchange.com/jsp/cmtyHelpDesk.jsp#8 for instruction on deleting questions.
DanRollins -- EE database cleanup volunteer
Hmm, I explained why the JViewport was not suitable and offered an alternative.
Thank you, finalized today by Moondancer - EE Moderator
https://www.experts-exchange.com/jsp/qManageQuestion.jsp?ta=java&qid=20169876
objects suggested using one of the drawImage() methods in the Graphics class to scale the image.