dehengxu / achartengine Goto Github PK

When you have a graph and you are able to pan, the data is visible on the left 
side of the axis. I don't think that should happen.

It would be super helpful if this were registered in a maven repo somewhere.

Hi, thanks for sharing this library to android world, 
I have one problem when use pie chart today.
In the source code of AbstractChart line 15 in drawLegend()
I saw , currentY += 15;

this is not right cause I will set the font size large than 15px in high 
resolution device, if I do so, for example set to 32px, the legend text will 
overlap each other.

I think the increase of currentY should depends on legend text size not 15, 
thanks.

/Dennis

What steps will reproduce the problem?
1. build a simple pie-chart with a 2 row big legend (for example 5 entries)
2. try to view the chartintent on wilfire emulator (320 × 240 px)

What is the expected output? What do you see instead?
there are 2 possibities
1. the chart is shrinked that small that all data is visible
2. there must be a vertical scroll bar to view the data at the end of the chart


What version of the product binary library are you using?
Version 0.5

Can minimum/maximum zoom limits been implemented to prevent users from zooming 
in to much and zooming out beyond the intended range.

Add a parameter for specifying the spacing between bars in bar charts.

Chart titles should be above the chart.  Instead they currently are inside the 
plot area (i.e. the top of the title is at the same level as the top of the Y 
axis).

I created a chart, and because I would like to have the background white, I was 
wondering if it was possible to either have the labels moved slighly to the 
left, so they no longer appear in the chart, but only left to it, or have an 
option to change the background color beyond the chart area.

Other than that very good library created here:)

I'm so sorry i cannot check out the source with eclipse form
Http://achartengine.googlecode.com/svn/trunk/ achartengine-read-only.

Please fix it ! Could you send it to my email? [email protected]
THX.

A nice function would be to be able to click and automatically zoom in on that 
point.

What steps will reproduce the problem?
1. Modified ChartDemo's BudgetPieChart.java to change data legend title
   from "Project" to "Events".

2. The legend shows "Project-1 ... n, no matter what title you use in the 
   call to buildCategoryDataset at line 55.


What is the expected output? I expect to be able to change the legend with
the dataset values.

What do you see instead? The legend for the data series is always "Project-1 .. 
n.

Please provide a source code snippet that we can use to replicate the issue.

Line 55 was:
  return ChartFactory.getPieChartIntent(context, buildCategoryDataset("Project budget", values), renderer);


I changed to:
    return ChartFactory.getPieChartIntent(context, buildCategoryDataset("Events Percent", values), renderer);


What version of the product binary library are you using?
0.5.0

Please provide any additional information below.

Hello!

I found you library some days ago when i was looking for a chart library for 
android. i tried it in a small project and i liked it at once.

Espacially the Zoom feature looks good. The only thing I miss is the 
possibility to zoom with "pinch to zoom", not only with the buttons.

Do you have planned something like this?

Regards,
Harald

What steps will reproduce the problem?
1. Create any graph with AChartEngine
2. Use another view on top of this graph ( I had a sliding drawer, from 
miscWidget on GoogleCode )
3. Move the sliding drawer

What is the expected output? What do you see instead?
The size of the graph was not the correct one.


Please provide a source code snippet that we can use to replicate the 
issue.


What version of the product binary library are you using?
Hum.. The last one ??

Please provide any additional information below.

Actually, I kind of fix it :
Changing graphicalView from :
 @Override
  protected void onDraw(Canvas canvas) {
    super.onDraw(canvas);
    canvas.getClipBounds(mRect);
    int top = mRect.top;
    int left = mRect.left;
    int width = mRect.width();
    int height = mRect.height();
    mChart.draw(canvas, left, top, width, height);
  }

To :
 @Override
  protected void onDraw(Canvas canvas) {
    super.onDraw(canvas);
    canvas.getClipBounds(mRect);
    int top = mRect.top;
    int left = mRect.left;
    //int width = mRect.width();
    //int height = mRect.height();
    int width = canvas.getWidth();
    int height = canvas.getHeight();
    mChart.draw(canvas, left, top, width, height);
  }


Note that it implies that the full graph view will be drawned every time, 
even if half of it is hidden. But I don't think it is such a big deal...

This library is actually quite good.  I initially discounted it because I saw 
the screenshots and it looked ugly.  After downloading it and playing with some 
of the options, you can actually make some pretty eye-popping graphs out of 
this thing.  And the API is simple to figure out.

If you update your screenshots, more people will use this awesome library!
Thanks for putting this together.

Is it possible to convert a chart to a bitmap file? It would be very helpful!

Thanks.

we are getting the data messed up , so we are not able to refine it ,
zooming & scrolling will take of it


we are currently using 0.4.0

Waiting for reply

What steps will reproduce the problem?
1. draw a bar chart with poitive & negative values & display values

What is the expected output? What do you see instead?
values put on top of positive bars, negative values put below negative values. 
Instead the negative values are rendered unreadable in the bars, see attached 
snapshot.

What version of the product binary library are you using?
0.5

What steps will reproduce the problem?
1. build a category data set with an array of doubles where some of the values 
in the array are 0.0
2.
3.

What is the expected output? What do you see instead?
Text labels are stacked on top of each other


Please provide a source code snippet that we can use to replicate the issue.
double[] values = new double[0.0, 0.0, 1.0, 2.0, 0.0];
CategorySeries series = buildCategoryDataset("Voting Results", values, answers);


What version of the product binary library are you using?
0.5.0


Please provide any additional information below.

What steps will reproduce the problem?
I have a Scrollview with some other views inside and a chart at the top.
When I scroll down and the chart gets out of screen at the top, it suddenly 
shrinks, because it wants to fit in the remaining space.

I looked at the code and changed the following thing to fix it for me:
In GraphicalView.java, Method onDraw at the beginning

    canvas.getClipBounds(mRect);
    int top = mRect.top;
    int left = mRect.left;
    int width = mRect.width();
    int height = mRect.height();

to

    int top = 0;
    int left = 0;
    int width = getMeasuredWidth();
    int height = getMeasuredHeight();


Now the chart just scrolls out as expected.

Cheers,
Harald

What steps will reproduce the problem?
1.
2.
3.

What is the expected output? What do you see instead?


Please provide a source code snippet that we can use to replicate the issue.


What version of the product binary library are you using?


Please provide any additional information below.

I need to change the underfill color per point on my graph.
Currently I am getting around this by doing multiple series and cleverly 
placing them however an inbuilt feature would be great.

Besides the zoom in/zoom out buttons, a zoom reset button would be handy.

It would be nice to have some kind of spline curves (smoothed curves) in 
addition to (edgy) line charts.
would need some kind of interpolation.

best regards, achim

Hello!

Our project recently switched to achartengine. I just spot an issue with 
Android 1.5:

Could not find method android.view.MotionEvent.getX, referenced from method 
org.achartengine.GraphicalView.handleTouch
E/AndroidRuntime( 2946): java.lang.VerifyError: org.achartengine.GraphicalView
E/AndroidRuntime( 2946):    at 
org.achartengine.ChartFactory.getBarChartView(ChartFactory.java:144)

Using achartengine-0.6.0.r140.jar
Is there a way to avoid this?
Or maybe achartengine explicitely does not support Android 1.5?

Thank you!

Downstream issue: https://code.google.com/p/ankidroid/issues/detail?id=422

The back ground is white,so I have to change the grid color ,but the I can't 
get it in the API.

The key at the bottom of the chart should show the 'style' of the data series 
as well (i.e. circle/square, etc).

Make chart axis labels not overlap with the tick lines or the axis lines.
Add some configuration parameters for this.

if you use a lot of textlabels on x-axis, they are rendered on top of each 
other. It would be nice to have a mehtod to rotate them (e.g. for 90 degrees in 
the first step, free rotation in future releases)

What steps will reproduce the problem?
1. Create a chart
2. Display chart with startActivity(ChartFactory.getLineChartIntent(this,
dataset, renderer));
3. Observe created chart

What is the expected output? What do you see instead?

The titlebar contains my application's overall title with no way to set the
title.

Please provide a source code snippet that we can use to replicate the issue.

Please see above

What version of the product binary library are you using?

0.3.0

Please provide any additional information below.

Can the
Zoom In
Zoom Out
Zoom Reset

Functions be made public interfaces so I can call them from my own themed, 
rendered and placed buttons.

What steps will reproduce the problem?
1.  Attempt to make a barchart with only one series
2. It doesn't work- get error and must force stop
3.

What is the expected output? What do you see instead?


Please provide a source code snippet that we can use to replicate the issue.

must use XYMultipleSeriesDataset - makeBarChartIntent depends on it.  

What version of the product binary library are you using?

0.5

Please provide any additional information below.


Thanks,
Eric

You need to replace ArrayList<Double> in XYSeries.java on TreeMap<Double, 
Double> and do every consequent action. 

The only visible part of chart should be drawn. Now it paints all the chart, no 
matter if you can only see 5% of the chart by zooming.

I replaced array lists by maps. Before it started to work slow after 2000 
points. Now no matter how many points there are there, it works as same as in 
the beginning. Here's the code http://pastebin.com/JHnaLUsB

it's not perfect, but you can get the main idea.

Is it possible to get a callback on pinch zoom ?

When my chart zooms I turn on values at point to give that extra level of 
detail and need to do it when they pinch to zoom in/out to turn it on & off 
again.

When you have a a Y value with 4 or more digits, the values on the left side of 
the Y-axis will overlap the Y-label or fall of the screen.
Adding a option to set the margins (or do it automatically) will fix this.

When panning, you can keep on panning, beyond the limits. It should probably be 
better to set limits for panning.

I have several charts on my display at one time. They are each added to a 
separate LinearLayout, the first two weighted (equally), the 3rd is set to a 
fixed size of 100dip:
<linearlayout android:orientation="vertical">
   <linearlayout id="chart1" android:layout_weight="1" />
   <linearlayout id="chart2" android:layout_weight="1" />
   <linearlayout id="chart3" android:layout_height="100dp" />
</linearlayout>

i programmatically add the View to each of the linearLayout elements.

What is the expected output? What do you see instead?
I expect to be able to see the full chart, including the key & all axis text. 
for the 3rd chart, and the first two (if they have > 1 line of key text), the 
bottom of the chart is cropped. 


Please provide a source code snippet that we can use to replicate the issue.


What version of the product binary library are you using?
tested both on v0.5 and repository revision r56

Please provide any additional information below.
in the attached screenshot, the second chart (one with green line) should have 
three rows in its key/legend, but it is only showing one.
the last chart ('computer inaccuracy') is missing the key/legend altogether.

Looking at your code, this shouldn't be that difficult

Support for null values should be added such as line or bar charts should not 
be rendered for these.

Enhancement request for the legend to only be as large as it needs to be. 
Currently it is either controlled directly by the end-user or defaulted to 1/5 
of the chart's height.

I directly include achartengine's source code in my app's source code, so if I 
end up implementing this, I'll refer you to my solution.

What steps will reproduce the problem?
1. Add <uses-sdk android:minSdkVersion="4"/> to AndroidManifest.xml in the Demo 
program and any app use this api.
2. Install the Demo apk 
3. Run the Demo apk

What is the expected output? What do you see instead?
Without <uses-sdk android:minSdkVersion="4"/> in AndroidManifest.xml, the 
labels look normal. When add this line, the label becomes tiny. 

Please provide a source code snippet that we can use to replicate the issue.
I downloaded the Demo code and insert <uses-sdk android:minSdkVersion="4"/> in 
AndroidManifest.xml. This is the only change.

What version of the product binary library are you using?
Tested on the 1.5 and 2.2

Please provide any additional information below.

In GraphicView, line 238, 
(mRenderer.isPanXEnabled() || mRenderer.isZoomYEnabled() || 
mRenderer.isZoomXEnabled() || mRenderer
            .isZoomYEnabled())

the secondary condition should be isPanXEnable().

/Dennis

I like your new pan/zoom functions! I don't know what is on your todo
list, but I like the option to only zoom horizontal (or vertical for
other people). This is because I have a lot of data I want to display,
wherein the max/min Y values are staying the same, but the x-ax is
getting more points, the more time the app is recording.
I fixed this manually, by just removing the zoomparts and pan parts
for the y-axis, but maybe more people would like this function.

What steps will reproduce the problem?
1. Display a MultipleXY Line graph
2. Zoom in
3. Pan fully to the left
4. Try to pan to the right

What is the expected output? What do you see instead?
I expect the data to pan to the right, but that doesn't work. Before I pan 
fully to the left, I can also pan to the right..



What version of the product binary library are you using?
svn rev 97

Please provide any additional information below.
- I have set only X-panning and have set a limit for panning. The limit works, 
but stops working when panning to the left (to zero).
I don't know if I'm doing something wrong, or this is a bug..

The charts look 1E6 times better with anti-aliasing enabled.  Here's a patch.
The patch can be applied from within the directory trunk/achartengine with
the command:
patch -p1 < anti_aliasing.patch

What steps will reproduce the problem?
1. Pass any integer x > 720 or x < -720 and getAngle()'s value will not be 
between 0-360

example:

passing 1080 will return 720


Please provide a source code snippet that we can use to replicate the issue.

From org.achartengine.util.MathHelper.java:

public static int getAngle(int angle) {
    if (angle < 0) {
      return ANGLE + angle;
    }
    if (angle > ANGLE) {
      return angle - ANGLE;
    }
    return angle;
  }


What version of the product binary library are you using?
0.5.0


Please provide any additional information below.

This can be fixed with:

public static int getAngle(int angle) {
    return angle % ANGLE;
  }

What steps will reproduce the problem?
1. extend Activity not ListActivity
2. create a Barchart intent with 5  different SERIES


What is the expected output? What do you see instead?
I expected 5 different Bars with a width as seen in the examples, but i got 
bars which are more equal to lines than bars.

Please provide a source code snippet that we can use to replicate the issue.
private static final int SERIES_NR = 5;

//in dataset
 for (int i = 0; i < SERIES_NR; i++) {
          CategorySeries series = new CategorySeries("SeriesName");

        .......

series.add(value);
dataset.addSeries(series.toXYSeries());

What version of the product binary library are you using?
Current Version in Trunk

Please provide any additional information below.

What steps will reproduce the problem?
1. hold phone sideways
2. load a graph
3.

What is the expected output? What do you see instead? I expect a graph but 
instead I get force close


Please provide a source code snippet that we can use to replicate the issue.
        String[] titles = new String[] { "" };

        int[] colors = new int[] { Color.BLUE };
        PointStyle[] styles = new PointStyle[] { PointStyle.POINT };
        XYMultipleSeriesRenderer renderer = buildRenderer(colors, styles);
        // try catch to keep it from crashing if values are null
        try{
        setChartSettings(renderer, "", "Time", Units, dateValues[0].getTime(),
                dateValues[dateValues.length - 1].getTime() , MIN - .2, MAX + .2, Color.GRAY, Color.LTGRAY);
        } catch (Exception e) {
            e.printStackTrace();
        }
        renderer.setYLabels(8);
        renderer.setXLabels(4);
        Intent intent = ChartFactory.getTimeChartIntent(this, buildDateDataset(titles, dates, values),
                renderer,  "MM/dd hh:mm aa");
        startActivity(intent);


What version of the product binary library are you using? 5.0


Please provide any additional information below.

I want to draw a line in a bar chart. Currently, there is no way to mix a line 
chart with a bar chart. Can you provide a way to mix line chart with bar chart ?

Thanks.

Bug is in conversion long -> double -> long. The first one is in 
TimeSeries.add(), the second one stays in TimeChart.drawXLabels().
Because of trimming of numbers sometimes it is impossible to restore Date 
class to draw labels.

with the new, zoom-enabled library, the GraphicalView does not call the super's 
implementation of onTouchEvent, which causes a loss of functionality.
For example, I want my application to launch an activity if the chart is 
selected, but using the new library, this event will be caught by your code. 
even if pan/zoom is disabled, I cannot use a touch/click/select event.
Please add:
return super.onTouchEvent(event)
instead of 'return true', so the default behavior persists. It might be good to 
skip the above call if pan/zoom are enabled (i.e. return true in the if() 
block).