amCharts & amMap blog

FEATURE ADDED:
A new setting, <group_to_full_periods_only> added. This setting affects the chart only if your data contains minutes or seconds. If this is set to false, the chart will try to group data to 10 and 30 sec or min intervals. Otherwise the chart will group to full periods only (seconds -> minutes -> hours…). Note, the default value is “false”. This means the default behavior of the chart was changed – you should set it to “true” in case you want to keep the old behavior.

FEATURE ADDED:
Legend can now show change of the value/percents comparing to the previous date. Previously you could only show the change comparing to the first value of the selected period.

If you want to show percent change of a value comparing to a previous value, use:
{close.percents.single}

If you want to show value change comparing with previous value, use:
{close.change.single}

Download Stock chart

We have just released an update for amCharts flex charting components, with some nice new features:

• coordinateToValue(coordinate) method added to ValueAxis. Converts coordinate (pixels) to value.
• recalculateToPercents property added to valueAxis. If you set it to true, values will be recalculated to percents, using first selected data items value as base value. To show percent values in balloons or legend, use [[percents.value]], [[percents.close]] tags. There is a checkbox “racalculate to percents” in candlestick example. Check it to see this feature in action.
• graphs can have a different dataProviders from main chart’s data provider. Note: only categories available in chart’s dataProvider will be visible.
• zoomToValues(startValue, endValue) method added to ValueAxis. It can only be used with XY chart.
• When zooming XY chart, value axes dispatch axisZoomed event, with startValue and endValue properties.
• invalidateData() method added to AmChart.

Some minor bugs were fixed.

Download flex components

The most exciting news about version 1.4.0.0 is that we added XY (or Scatter/Bubble) and Radar (Polar) charts.

Upgrading from previous version

The new chart types caused some changes in the structure, so there will be several things you’ll need to do when migrating from previous versions. We are sorry for this inconvenience but we feel it is the absolutely necessary change for the sake of consistency in all future versions.

1. AmCartesianChart class renamed to AmSerialChart – simply change the name in your applications.

2. “cartesian” folder with classes like AmGraph, ChartScrollbar, ChartCursor changed to “chartClasses” – if you import one of these classes in your Actionscript, you should change the path to the class.

3. AmChart, AmBalloon, AmLegend classes were moved from com.amcharts to com.amcharts.chartClasses. Change the paths to these classes too.

4. Even if you do not use these classes in your ActionScript, but only mxml, Flex builder can cache the old paths to these classes and show errors when compiling application. The most easy way to solve this is to remove all your amChart objects from the application, save it and bring it back exactly as it was. Now the application should compile properly.

5. CartesianChartEvent is renamed to SerialChartEvent.

6. PieChartEvent and SerialChartEvent (previously CartesianChartEvent) do not have dataUpdated event type anymore. dataUpdated event is now AmChartEvent’s type.

The final version of Flex components will be released on February 8. We do not plan adding new features during this time. The structure won’t change again.

Download Flex charting components

Best regards,

amCharts team.

We have just released a new amStock 1.2.2.0 version with a whole slew of fixes and enhancements. [Download]

• A new setting <balloon_text> was added to <data_set_selector> group. Sometimes data set title doesn’t fit in the drop-down. If you set a value like {title} here, the roll-over balloon will display full title so users can read it. You can also display {short} title and a {description} in this balloon.
• A new setting, <disable_custom_cursors> was added. If you set it to true, custom hand and resize arrow cursors will be disabled.
• A new setting, <chart><events><show_date> was added. If you set it to false, the date will not be displayed in the balloon (when you roll-over the event bullet)
• When user clicks on a predefined period button, this JavaScript function is called: amPeriodSelected(chart_id, type, count, id);
• Now you can select predefined period with this JavaScript function:

  flashMovie.selectPeriod(id);

  id is the pid attribute: <period type="DD" count="10" pid="p1">10D</period> or order number of your period if you don’t have pid attribute.

• amClickedOn and amRolledOver JavaScript functions now return Array of objects containing data set title, short title, id and values of a clicked date:

  amClickedOn(chart_id, date, period, data_object)

  data_object’s structure:

  a) when data is not grouped into longer periods:
      values:
        volume:
          close: 21010110
      id: 0
      short: ES
      title: East Stock

  b) when data is grouped into longer periods:
      values:
        volume:
          close: 16344710
          high: 21587410
          low: 16344710
          sum: 90934150
          open: 16509710
      id: 1
      short: ES
      title: East Stock

• FIX:In some cases event bullets were incorrectly placed above the graph.

Since v 1.3.2.0 beta we added additional swc file to the package of our Flex components  – amChartsFB4.swc. This file was compiled for use with Flash Builder 4 (aka Gumbo) – enjoy!

Note, because of naming conflict style “depth” was changed to “depth3D” in this version (both in Flex 3 and Flash Builder 4 components). So if your charts were 3D, you should change this style name in your applications.

We just released the new version of amStock 1.2.1.0 [Download]

New features

• A new setting, <update_on_release_only> was added to <scroller> settings group. If you set it to true, the chart will not update while dragging or resizing scrollbar. The view will be updated only when you release mouse button. This is useful if you work with large data sets and want to make your chart work faster.
• Stripping unnecessary symbols from your data
  A new setting, <strip_symbols> was added to <csv> settings group. For example:
  <data_sets>
     <data_set>
        <csv>
           <strip_symbols>",</strip_symbols>
  Means the data parser will strip all " and , from your data before parsing.
• The chart can be scrolled with mouse wheel. Note, the chart must have focus (click once on the chart) in order this feature to work. This feature will not work if wmode is set to transparent or opaque (in your HTML).

We are happy to announce the release of the new version of amCharts Flex Components. The following features were added since the first release:

• candlestick and OHLC (open/high/low/close) graph types are now supported.
• negativeLineColor and negativeFillColors styles added to AmGraph. These styles allow coloring of negative part of line graph or negative columns with different color.
• Cartesian charts can be scrolled and zoomed with mouse wheel.
• Cartesian charts now support rotated axis values.
• Columns can now have rounded corners.
• Custom bullets can be used.
• Cartesian charts now support guides – both vertical and horizontal.

These are all main features we planned to add to Cartesian chart component until the final release.  We plan to add XY and Radar charts to the component set before the end of 2009.

We’ve updated our ASP.NET Controls for amCharts to support new features of 1.6.4.0 version of flash components. A couple of bugs were fixed along the way. Here’s a change log:

• FEATURES ADDED: XyChart: FillColor, FillAlpha and MinMax properties added
• FEATURE ADDED: ColumnChart: ColumnHoverColor property added.
• FEATURE ADDED: ColumnChart: ColumnCornerRadiusTop and ColumnCornerRadiusBottom properties added
• BUGFIX: PreloaderForeColor and PreloaderBackgroundColor where not rendered properly when using know color names (Black, White, etc.)
• BUGFIX: PieChart: when custom Colors where not set and AppendSettingsToExternal property was set to true, custom colors in external settings file where overridden by defaults
• BUGFIX: LineChart: YRightGridXxx settings were not applied unless some non-default setting was set on the YLeftGridXxx

Download ASP.NET Controls for amCharts.