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I need a Qt widget that will allow me to display a map.
It needs to be able to:
Run without a network connection to a map or tile server. A simple bitmap would be fine.
Place widgets, lines and graphics on the map, given latitude and longitude.
Calculate distances between points.
Compile on Linux and Windows.
What would you suggest?
Thanks,
sqqqrly
I'd recommend taking a looking at Marble.
It's included with KDE-edu, but if I recall correctly, the Marble library does not have any dependencies beyond just Qt, it's also under the LGPL, and it's cross-platform. You should be able to place widgets and various other things on the surface.
Quantum GIS is the leader of the pack.
There is a map editor written for OpenStreetMap, which uses Qt.
http://www.merkaartor.org/
For map rendering they uses Webkit, I guess, but not really sure. Try to contact the author or read the source.
Hi every one QMapControl and ArcGIS could be a good try.
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I need to develop an interactive graph visualization, which will run againsta a Neo4J engine. It is expected to have rich visualization features like representing edges accoding to certain attributes (eg. visual width depending on attributes like amount).
By 'interactive' I mean that the end user should be able to click on a node in order to expand neighbour nodes and relationships.
I could not find such a graph visualization library so far. Open source would be a plus.
Depending on what you need exactly, our Sandbox may be what you are looking for. Perhaps we cannot offer you all the plusses you may want, but it's a start.
Disclosure : I work for Graphileon
Popoto JS is a nice open source tool.
It doesnt offer the specific feature you're asking for, but it is definitely worth a look.
IMO there is no such open source tool available as of right now, that supports exploring, visualizing and interacting with Neo4j graph.
You could use https://github.com/johnymontana/neovis.js that can visualize data from Neo4j and draw visualizations based of certain attributes and add interactivity to it. There is also https://www.ayalpinkus.nl/shinglejs/ which looks cool.
I am currently doing something similar and look up to payable versions like https://linkurio.us/ or https://cambridge-intelligence.com/keylines/
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I would like to know whether there any drawing tools available to map a given use case solution in terms of EIPs. There is a stencil available for MS Visio and a SVG alternative for OpenOffice. The shapes in the stencil is good but does not seem like the best graphics for a presentation. Any alternatives available for drawing EIPs? Thanks in advance.
diagrams.net has a set of EIP stencils built-in. I'm not sure if it addresses the issues in the question, but the tool is free. (I'm a developer on the project).
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Btw you could automate that. Check this:
http://camel.apache.org/visualisation.html
Use camel:dot maven goal
I've created an OmniGraffle EIP stencil years ago for the book Spring Integration in Action. I pushed it to Graffletopia, but I cannot find it there quickly. Let me know if you are interested in the OmniGraffle stencil and I'll search a bit more.
What is wrong with the stencils? Those are simply the shapes presented in the book Enterprise Integration Patterns. Looking at a presentation from the author of the book, I don't think the shapes look bad in presentation: http://www.eaipatterns.com/docs/jaoo_hohpeg_enterpriseintegrationpatterns.pdf.
I am not aware of any tools to draw EIP scenarios other than say Visio, Open Office Draw or similar tools. There are some IDEs to create routes (Fuse IDE and Talend Open Studio for instance), but these are really just to create runnable EIP implementations, not for presentation.
Late to the party, but Lucidchart (online cloud-based diagram tool) has an Enterprise Integration Pattern stencil, too.
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i'm trying to start a 2D game in Qt. I'm trying to find any tutorials on how to start developing it...
Any good tutorial there on internet? (If it's possible Qt 4.7+)
OpenGl by itself in Qt is not different from Opengl without Qt. The only difference is the way you create your OpenGl window.
You need to derive the QGLWidget class and overload the PaintGL-memberfunction. Take a look at the HelloGL example (which is already quite extensive).
Now that you have your OpenGl window look for normal OpenGl tutorials which are available all over the internet.
If you're using Qt for 2D games, I'd let Qt handle the OpenGL aspect of it and just use QGraphicsScene et al.
If you consider using a Qt/QML based engine, giving you the advantages of cross-platform support and many useful game components for handling multiple display resolutions & aspect ratios, animations, particles, physics, multi-touch, gestures, path finding and more (API reference), take a look at V-Play (v-play.net).
They also provide you with several tutorials for different skill levels and come with ready-to-use game templates for the most successful game genres like tower defense, platform games or puzzle games. (V-Play examples & demos)
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I have a series of cities that I need to programmaticly draw arcs between on a global map. The arcs also have to be labeled with a series of values. Output needs to be png or something similar (i.e. I am not looking for a javascript solution.)
Any suggestions on ways of doing this? I can choose language or tool (so long as it is free).
From your description, any language would do. Java, Python, C# etc. They each have graphics libraries that make it easy to draw lines and text and output images.
Ah, found one that will work perfectly myself.
http://scipy.org/Cookbook/Matplotlib/Maps
Processing might fit your bill
http://processing.org/exhibition/
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Can anybody recommend a Bar Code web server control for formats 39 and 128 formats?
UPDATE: I posted this after being given a choice of 3 controls we'd never heard of. I was hoping to get a recommendation from somebody who is using something that is popular, stable and a commercial product. It looks like we will just go with one of the choices our manager sent. If you are reading this after the fact, and have a good recommendation, please add it for others needing one in the future. thx
There is a series of articles on CodeProject articles that do just that:
Drawing Barcodes in Windows Part 1 - Code 39
Drawing Barcodes in Windows Part 5 - Code 128
Another one:
Barcode Image Generation Library
Another way, using barcode Fonts, but simple to use in ASP.Net
Barcodes in ASP.NET applications
Actually, implementing you own barcode drawing routines is not too hard if you stick with simple 1D barcodes.
The best book ever on the subject is The Bar Code Book. It's one of these absolute reference books that you just want to keep and read out of pure nerdy pleasure.
There is also an open source ASP.NET barcode generation framework on www.codeplex.com:
http://www.codeplex.com/BarcodeRender
I did have a problem with the Interleaved 2 of 5 symbology, but I believe it was added rather recently. Perhaps the other symbologies are more stable.
Guys... don't go too far. There are Windows Fonts (TrueType fonts / TTF) that can easily be used to draw bar codes. the Graphics object is your friend.
You definitely should check out these two options:
1) www.idautomation.com
2) barbeque open source library (Java) to generate barcodes.
Both are excellent!