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Problem with Canvas and JFreeChart 1.0.13 [message #1806623]

Sun, 12 May 2019 10:21

Jean-Pascal Laux

Messages: 82
Registered: December 2011

Member

I migrate my RCP application to RAP.
My application uses a lot of JFreeChart graphs and I add some problems :

- Dotted lines are drawn as solid lines
- Graphs seem to be zoomed and owerflow the view (the picture seems blurry)
- Some fonts seem to be changed by anothers

I have attached capture screens for the second point.

Attachment: firefox.png
(Size: 50.61KB, Downloaded 227 times)
Attachment: chrome.png
(Size: 52.09KB, Downloaded 226 times)
Attachment: ie.png
(Size: 50.75KB, Downloaded 225 times)
Attachment: rcp.png
(Size: 28.68KB, Downloaded 201 times)

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Re: Problem with Canvas and JFreeChart 1.0.13 [message #1806738 is a reply to message #1806623]

Tue, 14 May 2019 13:59

Dmitry Dukhov

Messages: 195
Registered: February 2013

Senior Member

You generate chart as image through JFreeChart. RAP does not deal with JFreeChart, only get ready images.
try use for your java app
System.setProperty("java.awt.headless", "true");

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Re: Problem with Canvas and JFreeChart 1.0.13 [message #1806743 is a reply to message #1806738]

Tue, 14 May 2019 15:18

Jean-Pascal Laux

Messages: 82
Registered: December 2011

Member

Thanks but setting this property does not work.

I don't generate image. I am able to interact with the chart (zoom, save, hide/unhide graph)
It is like if the destination canvas is larger than the canvas itself.

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Re: Problem with Canvas and JFreeChart 1.0.13 [message #1806760 is a reply to message #1806743]

Tue, 14 May 2019 19:44

Dmitry Dukhov

Messages: 195
Registered: February 2013

Senior Member

>I am able to interact with the chart (zoom, save, hide/unhide graph)
But how?
This is AWT library and use for web java script is impossible. only for native java app

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Re: Problem with Canvas and JFreeChart 1.0.13 [message #1806814 is a reply to message #1806760]

Wed, 15 May 2019 15:04

Jean-Pascal Laux

Messages: 82
Registered: December 2011

Member

I think you are right.
Only mouse events are captured and the image is updated.

It seems that BasicStroke does not work.

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Re: Problem with Canvas and JFreeChart 1.0.13 [message #1806826 is a reply to message #1806814]

Wed, 15 May 2019 17:58

Dmitry Dukhov

Messages: 195
Registered: February 2013

Senior Member

I use https://git.eclipse.org/c/rap/incubator/org.eclipse.rap.incubator.chart.git

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Re: Problem with Canvas and JFreeChart 1.0.13 [message #1806828 is a reply to message #1806826]

Wed, 15 May 2019 20:16

Jean-Pascal Laux

Messages: 82
Registered: December 2011

Member

My source code is used for generate RCP and RAP applucation.
I have refactoring it to solve most of the issues i have.
For chart, the last issue is BasicStroke.

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