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Hi, I've got one remark, you use a boolean bAddEntity for adding entities. Instead of setting that boolean where you do it, you could set it only if the line is realy drawn. This way an entity only is added if it realy is needed. if (state.workingLine.intersects(dataArea)) { // Set boolean bAddEntit...

Hi all, Several days ago someone posted a question about clicking on lines. I did some more research and came up with the following: Graphics2D has a method hit(Rectangle, Shape, boolean) that checks if Reactangle intersects with Shape. What I did for now is to get the EntityCollection of a chart an...

You left out the drawing of the entities completely? You could, for a start, use a boolean, so that an entity only is created if a line is drawn (like I do in the XYLineAndShapeRenderer).

Alexander

Hi all,

Can someone reply to this, if this is a correct way to solve this problem?

TiA,

Alexander

Hi all, I am working on something to make it possible to detect line clicks on XY chart. What I came up with is the following: Edit the XYLineAndShapeRenderer to create polygons for every line, create something like a XYEntityItem, add this "XYLineItem" to a List, make this List available to the out...

Hi, Thx for the code, will look into it a little more. Looks like I will have to change it so it doesn't use a TimeSeries anymore. I also tried to draw everything in at once using drawPolyline, but this gave some strange behaviour. If I resized my screen to become larger, at one point (something abo...

Hi, thx for the hints. Looking at the LineAndShape renderer I see that you use 2 separate passes for drawing the shapes and the lines, is there a reason to do it that way? Doing the drawing/creating of lines and shapes in one step makes much more sense, now it has to calculate the position for every...

Great to hear that!

I will finalize my code some time this week, if you are interested I'm willing to post it here so you can use it.

I really need a very fast chart component, so if you have any more suggestions I'd like to hear it. I don't mind hacking in the jfreechart code.

Alexander

Hi,

Did you get this working? I also need to be able to determine if a click was on a line.

TiA,

Alexander

Hi,

This is kinda off topic for this forum, but are you using sax or dom? Sax is faster as dom. Besides that, what parser do you use? Might be some parser that is faster, but I don't remember which ones are fast/slow.

Also take a look at the properties of the parser, enable/disable validation etc.

Hi, I do have the same problem, but need to be able to show much more datapoints. I did look at the jfreechart code myself, and came up with some adjustments for XY charts. I do not know what type of chart you want to use. But in case of XY charts the following might help: In StandardXYItemRenderer ...

Hi all,

Just wondering, did anyone get a reply to this thread? I'm also interested in this code, but wondering if someone ever got a reply.

Alexander

Hi, In an older release there was an example of panning a XY chart. That example doesn't work with the 1.0.0rc, but the way it works is simple. And I think it can also be used on the gantt chart you want. What the example does is add a mouselistener and a mousemotionlistener to the chart panel. Usin...

Hi,

Same here, and besides only showing, we also need zooming/panning on these large datasets.

Alexander

Hi again,

It looks like JFreeChart is using a Line2D to draw the lines. So I need to do something else to get better performance. Does someone know of some ways to get better performance?

TiA