When we released the Charts 1.0.0 in early July we set as the target to provide 2 additional releases during this year. I’m happy to announce that the first one of those releases (1.1.0) is now available in the Customer Portal.
In this Blog post I’ll go through the new functionality and changes included in this release. If you are new to Qt Commercial Charts, please take a look at the previous blog posts to get the basics what you can do with Charts.
The focus in making this release was to further improve the existing functionality and introduce some new functionality based on the received feedback. Unfortunately we also had to make some changes that break the binary and source compatibility between 1.0.0 and 1.1.0 releases. We are deeply sorry about the inconvenience.
New Chart Types
For this release we set as the goal to provide couple of new chart types (or actually variations of existing chart types): Horizontal Bar Chart and Donut Chart.
Also the placement of labels inside the pie slices has been improved so that you can use also tangential and rotated alignment.
New Axis features
For the Axis handling we have introduced different Axis types in order to show different types of data. For example showing Date and Time values is now easier. We have also added capabilities to format the value axis labels.
Line Chart Performance improvements
Many of the questions we had after the first release were related to using Charts for drawing rapidly updating line charts (updating speed and number of data points charts can draw). In order to better accommodate this kind of use cases we introduced two changes to the Line Chart: New data replacement method with better performance in XYSeries and Line drawing was also optimized. With the changes made you can create line charts with thousands of data points updating at 60fps. We also introduced a new example application that can be used for testing the performance in a particular use case.
Full list of changes can be found from the README file included in the source package.
Thank you for all of you that have provided valuable feedback and improvement ideas for the further development of the Charts.
Get the Charts now
Qt Commercial Charts 1.1.0 release is now available in the Customer Portal as well as through the Qt Commercial SDK. It is released as a source package.
As always with Qt Commercial, the charts are fully covered by our standard support. If you have any issues using them, just contact our support team through the Customer Portal.
Not a Qt Commercial Customer Yet?
You can test out the Qt Commercial Charts 1.1.0 and the rest of Qt Commercial by downloading a 30-day free evaluation of Qt Commercial. Let us know what you think!
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I have downloaded Qt Commercial Charts 1.1.0 source with license key. I have compiled the source with: qmake config+=release;mingw32-make; mingw32-make install. Now the question is: how to use the license key and I found *.prl file but not *.dll or *.a in \lib\release folder. When I tried to use it in my application it was giving a compilation error ‘permission denied’ against the use of library. Waiting for your suggestions. Thank you.
@K: This might be related to known issues with Qt 4.8.3 MinGW package. A new package that fixes the should be available shortly. You can also test with Qt 4.8.2 if this was the case.
Any roadmap for future development? I’m still looking for multiple axes on the same plot.
Multiple axis support is coming out in next release and we plan to get the release out during November.
Hello,
This lib is great for my needs.
What about tooltip on areas and point ?
Guillaume
@Inglese
There is a clicked() signal in the QXYSeries which you can use to implement tooltip.
In the next release we will have an example application on that.
Hi thanks for the quick answer.
I saw the clicked signal, but what i was looking for is a real tooltip (text shown when user hovered a QAreaSeries and points).
Yes, hovered signal is not in the QXYSeries. We will investigate if we could introduce it in the next release.
Thanks you for the feedback.
A good lib. However, there are serval probloms.
1. Performance are not good;
2. Anohter commen chart, spectrogram, is not support.
3. No tooltip?
Thanks for the feedback.
If you can provide us some information about the use case and environment perhaps we can see if we can do something for the issues you are experiencing. Please use the Customer Portal.
Spectrogram is not supported. We would be interested in hearing about the use case and the structure of the data.
Tooltip can be added to the application. However as stated above XYSeries is currently missing the hovered signal.
Once the chart is zoom / panned how to reset the chart ?