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I'm making an application in Qt to show bitcoin charts (perhaps to trade in the future as well).
I want it to be presented in the traditional OHLC (Open High Low Close) format.
So far the only ways I found to chart the price data was in Python (and not easy to update in realtime at all). Anyone knows a good chart library for C++/Qt that I can use here?
I see Qt, has Qt charts, but that's a paid library and I want my project to be free.
The QCustomPlot library can create OHLC and candlestick charts:
The class you're looking for there is the QCPFinancial plottable. For realtime display, you can change all the data with setData(...) and access or modify existing values with the data() method.
I've used QWT for live charts in biomedical applications and liked it a lot.
http://qwt.sourceforge.net/
It has a trade plot class you could have a look at:
http://qwt.sourceforge.net/class_qwt_plot_trading_curve.html
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This is a chart that represents a stat per hour. This was taken from last.fm website which shows the no. of "scrobbles" (songs played) per hour.
Is this kind of chart possible with chart.js? I have been able to find a highcharts equivalent of what I am looking for:
Highcharts Windrose Example
I am already using chart.js within my application and don't want to use 2 libraries to do one job. The closest I have been able to find a chart.js equivalent is this polar chart
Can anyone please guide me to a resource that will help me build something like this? Or if you know a better way to represent stat by hour, I am open to that as well.
Thanks.
It can not be done "out of the box" with chart.js
However chart.js exposed a lot of the canvas api, so you need to write your own chart.js plugin and register a own chart type.
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I need a custom Rich-Edit control for making a text processing application. It must be Open-Source so that I can add my own feature. The windows default Rich-Edit controls are buggy for me cause I'm using my own font ( Bangla Font ). I've used all version of windows Rich-Edit but none those works well for me.
So now I need an owner drawn Rich-Edit control which must be Open-Source and also should include all the features of windows rich edit control.
I've searched on Google but have not found any useful.
If anybody know, Please give me the website link.
Take a look at Scintilla
It's Open Source and Notepad++ uses it.
EDIT: since Scintilla isn't really made for that kind of rich edit you could download Open Office's source code and find out how they do it.
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I'd like to use a web service or a different solution to retrieve the names of all higher education institutions (universities, colleges, technical schools etc.) wordwide. This will enable the users of a job application web app to enter/select the higher education institution they attended in a consistent manner.
Could you please point out to such a resource?
You could use dbpedia.
Example query to get 50 universities:
SELECT ?university
WHERE {
?university rdf:type <http://dbpedia.org/ontology/University>
} LIMIT 50
You could use it at dbpedia sparql. You could also search for generic educational institution, college, etc.
Or you could simply use wikipedia universities list
EDIT:
List of 9000 universities, included country and web. Data is easy to extract as dataset its in CSV format. Link to github project
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I am looking for a API/web service for me to retrieve a list of landmarks, points of interest (and their GPS coordinates) near a given city. I tried google places including the query Place Search and type point_of_interest, but the results do not seem satisfactory.
For example, to Paris, I need an answer:
Eiffel Tower, Arc de Triomphe, Champs Elysees, ...
What would you advise me to find such information.
A couple options:
Foursquare Venues Platform
Factual Places API
Google places has the flag "point_of_interest" but only to show, not for search (see Table 2 in https://developers.google.com/places/documentation/supported_types)
Google Earth on the other hand has what you need. See the icons for Tourist destination, Monument and Historical Place in https://support.google.com/earth/answer/180709?hl=en#what
However I am not sure if there is an API for this data, or if you need to find a way to extract it from GE.
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I'm needing to do some screen layout proposals, and really like the look of the pictures used in Joel's Mercurial tutorial, example here:
http://hginit.com/01.html
Can someone enlighten me on what tool(s) will generate this kind of output?
I guess a related question would be if people have a favorite screen mock up tool? It's not a requirement for me that the mockup be "functional".
Thanks!
Mike
It looks like balsamiq to me; the Comic Sans is a dead giveaway...
Edit: I’ve used balsamiq for screen mock-ups, and it’s very good. The only downside is that it is not free. And it uses Comic sans! ;)
I agree with Sébastien, but would like to point out that Pencil might enable you to produce similar-looking mockups.
this looks like toolbar buttons used in the command line window
it took me a sec to realize you have to set the window widget's properties to display the buttons as shown to get them to show up