cross-platform | 易学教程

Write once run anywhere browser plugin tool/framework/language?

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问题 I'm looking to create a browser plugin which would run in all of the major browsers, the only problem is that it seems I have to re-create the plugin in every browser. Is there some tool or framework or language I can write a plugin with where it will automatically work on all major browsers? All I need the button to do is scrape webpage content off the active page and from a few of the linked pages, then send it to a program with sockets or named pipes. 回答1: Maybe these "frameworks" can help

How to compile Cocos2d-X with Marmalade?

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问题 Does any body know a tutorial, or a three simple step in order to compile the code the I wrote with Cocos2d-x with Marmalade? I want to take the code I already compiled and used in Cocos2d-X, insert into a marmalade project, and compile. In lots of places is written as easy, but I have difficult with this. I'll really appreciate if someone has some easy step to follow: "Maramalade + cocos2d-x for dummies style :) " Thanks, Adrian. 回答1: I think this post on Marmalade forum may help you. 回答2:

Communicate between c++ applications and web applications

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What are the various ways I can achieve communication (like function calls) from a web application to a c++ application? I've developed the c++ application to do image processing and want to display and transmit the result in real time to a web-page displayed on a browser. Nothing will 'transmit to a web browser'. Web browsers have to ask, and then you can respond with the data you want to display. As per @The MYYN, you can just have the C++ code drop suitable files and the browser can ask for them. Or, you can set up some sort of webapp. If you use Ajax you can get the browser to poll for

Qt Application switches focus to a different application after using a file open dialog

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I'm porting one of my Qt apps to Windows after developing on OSX. I didn't have this problem with OSX, but it happens now under Windows 8. When I open and select a file with QFileDialog::getOpenFileName() , the focus switches to some other app and I have to alt-tab back into mine. How do I make Qt revert to the main app once the file is selected in the dialog instead of doing this? You probably just forgot to set the parent for the QFileDialog - you need to pass the pointer to the current window to getOpenFileName : QString fileName = QFileDialog::getOpenFileName(this, tr("Open File"), "", tr(

git pull errors

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I'm trying to pull a commit made on a Linux machine into a Windows machine. I'm getting this error message: error: git checkout-index: unable to create file my/folder/name/: (Invalid argument) On the Linux machine there appeared to be 2 such 'name' folders called: 'name' and 'Name' . Even after uniting them under 'name' and re-committing, I still get the same error message. On Windows I have git version 1.7.3.1.msysgit.0 and on Linux I have git version 1.7.5.4. I did find a bunch of seemingly related SO questions of this nature, but none had a clear or relevant solution. UPDATE: The files are

Apple deprecating Java. Will Apple-specific customizations still work with other JREs/JVMs?

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Apple "deprecated" Java and will stop supporting it in the future. Assuming that Oracle will take over support for Java on the Mac, is there a way to be sure that Apple-specific hacks like those "put the menubar at the top of the screen" or "use the native theme by default" will be supported the same way on other JREs/JVMs targeting Apple's platform? Is there some industry standard or precedence how situations like these are handled or is this an additional burden for the individual developer (== yet another runtime to test)? Is it common practice to start from the perspective of the former

CMake: how to add compiler flags to non-default compiler

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问题 Hello I want to build a project with intel compiler. With default gcc I usually run: cmake -DCMAKE_CXX_FLAGS=-I/some/path /path/to/project And this works fine. cmake -DCMAKE_CXX_COMPILER=icpc -DCMAKE_C_COMPILER=icc -DCMAKE_CXX_FLAGS=-I/some/path /path/to/project When I try to use non-default compiler it does not path CMAKE_CXX_FLAGS variable content to compiler at all. How to fix this? Correct Answer is: You need to specify the type of the CMAKE_CXX_FLAGS variable: -DCMAKE_CXX_FLAGS:STRING=-I

How to set ContentPage orientation or screen orientation on particular page in Xamarin.Forms cross platform

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How to set Content-Page orientation or screen orientation on particular page in Xamarin.Forms cross platform. I have set ScreenOrientation = ScreenOrientation . Portrait at property of all platform but I want to show some page show in both variation means Portrait and Landscape, so how to set on page in `xamarin.forms. set screen orientation not device wise but set on page-wise some pages show in Landscape & some page show in Portrait in xamarin forms cross- platform You can do this by creating a dependency using DependencyService for specific platforms. Try doing this: Interface public

What is currently the most comfortable and reliable cross-platform Perl module to do parallel downloads?

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问题 I'm going to have to download a number of datasets via simply POSTing at an url and getting XML in return. I will be able to speed this up by doing more than one request at a time, but here's the hook: It will need to run on both Windows and Linux, so threads and forks are both out . (Since this is purely IO-bound i don't think they're needed either.) Additionally my coworkers aren't on a very high level of perl understanding, but need to be able to grasp how to use it (not necessarily what's

Platform independent math library

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问题 Is there a publically available library that will produce the exact same results for sin, cos, floor, ceil, exp and log on 32 bit and 64 bit linux, solaris and possibly other platforms? I am considering the following alternatives: a) cephes compiled with gcc -mfpmath=sse and the same optimization levels on each platform ... but its not clear that this would work. b) MPFR but I am worried that this would be too slow. Regarding precision (edited): For this particular application I don't really