android - achartengine time chart set initial range -

solution

instead of using setinitialrange() had set initial x-values using setxaxismin() setxaxismax(). little bit confusing, think.

original question

i'm working on project involving acharteninge library drawing time diagrams works excellent far. user capable of switching between various graphs (one xymultipleseriesdataset plus 1 timeseries per graph) via separate buttons. far, achartengine displays x values when graph shown.

however, asked display data captured in first 3 hours when graph shown, information relevant. nevertheless, user should still able scroll data captured after first 3 hours meaning limiting x-axis maximum value not option.

for example: there 2 curves. first curve drawn using data captured on period of 4 hours, while second curve created out of data captured on 18 hours.

in current version programme displays data of graph gets displayed meaning first curve shows 3 hours of relevant data while 1 hour of not important information shown too. "ratio" of second curve 3 15 (highly significant data vs regular data). result, different amount of high important information shown when user compares 2 curves making harder user compare data, has adjust zoom manually.

edit 01.04.2015 15:46

for setting initial range use xymultipleseriesrenderer instance's method setinitialrange(double[] initialrange); not affect graph @ all. below can see statement (currentlyprocessedcurve.getrecordstart() instance of joda's datetime , furhtermore it's x value of first displayed point):

public static final int chart_x_axis_initial_max = 3; public static final int chart_margin_pan = 45; ... double[] initialrange = { currentlyprocessedcurve.getrecordstart().minusminutes(applicationsettings.chart_margin_pan).todate().gettime(), currentlyprocessedcurve.getrecordstart().plushours(applicationsettings.chart_x_axis_initial_max).todate().gettime(), 0, 600 }; currentdatasetrenderer.setinitialrange(initialrange); 

tide (edit end)

the screenshot below approximately shows how curve should (just making clear: please consider graphs' shapes, should equal --> i'm trying say: know x-axis , y-axis label of 2 screenshots different, don't have better pictures yet):

desired initial range

finally, following screenshot shows how curve looks when displayed:

for enabling user compare curves have locked y-axis zoom.

any highly appreciated. in advance!

have consider pan option?

with option can limit axis maximum, , chart show important data on start, while user can scroll left or right (wherever have less important data points).

all need is:

• set pan enabled axis need
• set pan limits (so user can't scroll past last data point)

hope helps, cheers.