I dont know if this can help you

There is an option called Focus Follows Mouse 

Focus Follows Mouse - The Mouse pointer will grab automatically change focus to a new window inisde this one app if you mouse over it, instead of having to click a window to get focus, then clicking to do something.

[http://wineskin.urgesoftware.com/tiki-index.php?page=Manual+4.6+Advanced+-+Options][1]


  [1]: http://wineskin.urgesoftware.com/tiki-index.php?page=Manual%204.6%20Advanced%20-%20Options

I have written a few different mouse logical layers (for bridging different input devices, etc.). I have found that hooking into the OS level WM_INPUT event is a sure way of getting **very** real-time mouse position information. There is also a less rigorous solution of just polling the mouse data you need from one of Windows&#39; very primitive DLLs. They are lightning fast. You could poll on a 10ms timer and never see performance loss on a modern machine.

I installed sublime text 2 to OSX 10.8.2. 
In my Mac, python 2.7.3 is installed.

In sublime text2, I just type

    print &#39;Hello&#39;

but error occurred like below. 

```none
/usr/bin/python: can&#39;t find &#39;__main__&#39; module in &#39;&#39;
[Finished in 0.2s with exit code 1]
```

How can I fix it?





sublime text2 python error message /usr/bin/python: can&#39;t find &#39;__main__&#39; module in &#39;&#39;

After using RSpec for several projects, I&#39;m giving minitest/unit a go. I&#39;m liking it so far, but I miss using describe/context blocks to group my tests/specs in a logical way. 

I know minitest/spec provides this functionality, but I like that minitest/unit feels a bit closer to barebones Ruby. 

Are there any gems that provide describe/context support for minitest/unit? Or, should I just live with my long, unorganized test files in minitest/unit?

How to organize minitest/unit tests?

We&#39;re making a user-space device driver for OS X that moves the cursor using Quartz Events, and we ran into a problem when games — especially ones that run in a windowed mode — can&#39;t properly capture the mouse pointer *(= contain/keep it within the boundaries of their windows)*. For example, it would go outside the game window and click on the desktop or nearby inactive applications.

We could fix this if only we could detect when an active application calls CGAssociateMouseAndMouseCursorPosition.

How would you do this? Any ideas are appreciated.

Detecting CGAssociateMouseAndMouseCursorPosition

We're making a user-space device driver for OS X that moves the cursor using Quartz Events, and we ran into a problem when games — especially ones that run in a windowed mode — can't properly capture the mouse pointer (= contain/keep it within the boundaries of their windows). For example, it would go outside the game window and click on the desktop or nearby inactive applications.
We could fix this if only we could detect when an active application calls CGAssociateMouseAndMouseCursorPosition.
How would you do this? Any ideas are appreciated.

How do you check if Java SDK is installed on a Mac?

Is there a command line for this?


How do I check if the Java JDK is installed on Mac?

I want to use the JRE 1.7 that I downloaded [from Oracle website][1].


  [1]: http://java.com/fr/download/mac_download.jsp?locale=fr

So I correctly install the .pkg file, and when I try `/Library/Internet\ Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/bin/java -version` in the terminal I get this :

&gt; java version &quot;1.7.0_11&quot; Java(TM) SE Runtime Environment (build
&gt; 1.7.0_11-b21) Java HotSpot(TM) 64-Bit Server VM (build 23.6-b04, mixed mode)

But in Eclipse I can&#39;t use anything else than JRE 1.6. When I go in Properties &gt; Java Build Path &gt; Add Library &gt; JRE System Library, I can&#39;t find the 1.7 (there is only option for it : `JavaSE-1.7 (unbound)` with this issue : 

&gt; No JREs in workspace compatible with specified execution environment: JavaSE-1.7

What should I do ? Thanks

How to install JRE 1.7 on Mac OS X and use it with Eclipse?

We&#39;ve stumbled upon a performance problem with Quartz Events, more specifically CGEventPost: during heavy GPU load CGEventPost can block. We&#39;ve created [a small benchmark application to demonstrate the issue][1]. This application is just a loop that creates, post and releases events.

Below you can see the results of running the application. The first run is on an idle system. The second run is with FurMark (GPU stress test) with the dials cranked up as much as possible.

* Inner is how long the inner loop takes, basically just creating, posting and releasing an event with Quartz Events.
* Outer is how long our program is waiting to be woken up (a sleep). Should be close to the time we sleep, but if the system is under pressure it could be delayed.
* Post is how long the event post takes.

&amp;nbsp;

	18:58:01.683 EventPerformance[4946:707] Measurements: (outer should be close to 10)
	18:58:01.684 EventPerformance[4946:707] inner (ms): 0.04, outer (ms): 11.02, CGEventPost (ms): 0.03
	18:58:01.684 EventPerformance[4946:707] inner (ms): 0.04, outer (ms): 11.02, CGEventPost (ms): 0.03
	18:58:01.685 EventPerformance[4946:707] inner (ms): 0.07, outer (ms): 10.26, CGEventPost (ms): 0.03
	18:58:01.685 EventPerformance[4946:707] inner (ms): 0.06, outer (ms): 10.85, CGEventPost (ms): 0.05
	18:58:01.686 EventPerformance[4946:707] inner (ms): 0.07, outer (ms): 10.41, CGEventPost (ms): 0.04
	18:58:01.686 EventPerformance[4946:707] inner (ms): 0.04, outer (ms): 10.39, CGEventPost (ms): 0.03
	18:58:01.686 EventPerformance[4946:707] inner (ms): 0.05, outer (ms): 11.02, CGEventPost (ms): 0.03
	18:58:01.687 EventPerformance[4946:707] inner (ms): 0.03, outer (ms): 10.67, CGEventPost (ms): 0.03
	18:58:01.687 EventPerformance[4946:707] inner (ms): 0.08, outer (ms): 10.09, CGEventPost (ms): 0.05
	18:58:01.688 EventPerformance[4946:707] Averages: (outer should be close to 10)
	18:58:01.688 EventPerformance[4946:707] avg inner (ms): 0.05, avg outer (ms): 10.64, avg post (ms): 0.03


Here we can see that posting the event takes about 0.03 ms on average. Also the thread seems to be woken up around 0.5ms too late. No spikes in CGEventPost.

	19:02:02.150 EventPerformance[5241:707] Measurements: (outer should be close to 10)
	19:02:02.151 EventPerformance[5241:707] inner (ms): 0.03, outer (ms): 10.23, CGEventPost (ms): 0.02
	19:02:02.151 EventPerformance[5241:707] inner (ms): 0.02, outer (ms): 10.54, CGEventPost (ms): 0.02
	19:02:02.151 EventPerformance[5241:707] inner (ms): 0.02, outer (ms): 11.01, CGEventPost (ms): 0.01
	19:02:02.152 EventPerformance[5241:707] inner (ms): 0.02, outer (ms): 10.74, CGEventPost (ms): 0.01
	19:02:02.152 EventPerformance[5241:707] inner (ms): 0.02, outer (ms): 10.20, CGEventPost (ms): 0.01
	19:02:02.152 EventPerformance[5241:707] inner (ms): 10.35, outer (ms): 11.01, CGEventPost (ms): 10.35
	19:02:02.152 EventPerformance[5241:707] inner (ms): 0.03, outer (ms): 10.02, CGEventPost (ms): 0.02
	19:02:02.153 EventPerformance[5241:707] inner (ms): 58.90, outer (ms): 10.11, CGEventPost (ms): 58.90
	19:02:02.153 EventPerformance[5241:707] inner (ms): 0.03, outer (ms): 10.12, CGEventPost (ms): 0.02
	19:02:02.153 EventPerformance[5241:707] Averages: (outer should be close to 10)
	19:02:02.371 EventPerformance[5241:707] avg inner (ms): 7.71, avg outer (ms): 10.44, avg post (ms): 7.71

When the system is under heavy GPU load, posting an event can take (spikes) milliseconds instead of microseconds. Under extreme GPU stress (&lt; 1 FPS), this value can take seconds. CGEventPost _sometimes_  seems to be waiting for the GPU to finish some work before returning. Our thread is still scheduled normally with no noticeable delay/spikes (outer).

Any ideas are appreciated.


  [1]: http://smoothmouse.com/storage/EventPerformance.zip

Weak performance of CGEventPost under GPU load

Brew doctor says: 

&gt; Warning: /usr/local/include isn&#39;t writable. This can happen if you &quot;sudo make install&quot; software that isn&#39;t managed by Homebrew.
&gt; 
&gt; If a brew tries to write a header file to this directory, the install
&gt; will fail during the link step.
&gt; 
&gt; You should probably `chown` /usr/local/include

I&#39;ve tried different commands to solve this but I&#39;m still stuck here.

I&#39;m running homebrew on 10.8.2


Brew doctor says: &quot;Warning: /usr/local/include isn&#39;t writable.&quot;

I&#39;m trying to install a gem using `gem install mygem` or update RubyGems using `gem update --system`, and it fails with this error:

```none
ERROR:  While executing gem ... (Gem::FilePermissionError)
You don&#39;t have write permissions for the /Library/Ruby/Gems/2.0.0 directory.
```

Does anyone have an idea how to solve this?

How to install a gem or update RubyGems if it fails with a permissions error

**To clarify the purpose of this question: I know HOW to create complicated views with both subviews and using drawRect. I&#39;m trying to fully understand the when&#39;s and why&#39;s to use one over the other.**

I also understand that it doesn&#39;t make sense to optimize that much ahead of time, and do something the more difficult way before doing any profiling. Consider that I&#39;m comfortable with both methods, and now really want a deeper understanding.

A lot of my confusion comes from learning how to make table view scroll performance really smooth and fast. Of course the original source of this method is from the [author behind twitter][1] for iPhone (formerly tweetie). **Basically it says that to make table scrolling buttery smooth, the secret is to NOT use subviews, but instead do all the drawing in one custom uiview.** Essentially it seems that using lots of subviews slows rendering down because they have lots of overhead, and are constantly re-composited over their parent views.

To be fair, this was written when the 3GS was pretty brand spankin new, and iDevices have gotten much faster since then. Still [this method][2] is [regularly][3] [suggested][4] on the [interwebs][5] and elsewhere for high performance tables. In fact it&#39;s a suggested method in [Apple&#39;s Table Sample Code][6], has been suggested in several WWDC videos ([Practical Drawing for iOS Developers][7]), and many iOS [programming books][8].

There are even [awesome looking tools][9] to design graphics and generate Core Graphics code for them.

**So at first I&#39;m lead to believe &quot;there’s a reason why Core Graphics exists. It’s FAST!&quot;**

But as soon as I think I get the idea &quot;Favor Core Graphics when possible&quot;, I start seeing that drawRect is often responsible for poor responsiveness in an app, is extremely expensive memory wise, and really taxes the CPU. Basically, that I should &quot;[Avoid overriding drawRect][10]&quot; (WWDC 2012 [iOS App Performance: Graphics and Animations][11])

So I guess, like everything, it&#39;s complicated. Maybe you can help myself and others understand the When&#39;s and Why&#39;s for using drawRect?

I see a couple obvious situations to use Core Graphics:

 1. You have dynamic data (Apple&#39;s Stock Chart example)
 2. You have a flexible UI element that can&#39;t be executed with a simple resizable image
 3. You are creating a dynamic graphic, that once rendered is used in multiple places

I see situations to avoid Core Graphics:

 1. Properties of your view need to be animated separately
 2. You have a relatively small view hierarchy, so any perceived extra effort using CG isn&#39;t worth the gain
 3. You want to update pieces of the view without redrawing the whole thing
 4. The layout of your subviews needs to update when the parent view size changes

**So bestow your knowledge. In what situations do you reach for drawRect/Core Graphics (that could also be accomplished with subviews)? What factors lead you to that decision? How/Why is drawing in one custom view recommended for buttery smooth table cell scrolling, yet Apple advises drawRect against for performance reasons in general? What about simple background images (when do you create them with CG vs using a resizable png image)?**

A deep understanding of this subject may not be needed to make worthwhile apps, but I don&#39;t love choosing between techniques without being able to explain why. My brain gets mad at me.

## Question Update ##

Thanks for the information everyone. Some clarifying questions here:

 1. If you are drawing something with core graphics, but can accomplish the same thing with UIImageViews and a pre-rendered png, should you always go that route?
 2. A similar question: Especially with [badass tools like this][12], when should you consider drawing interface elements in core graphics? (Probably when the display of your element is variable. e.g. a button with 20 different color variations. Any other cases?)
 3. Given my understanding in my answer below, could the same performance gains for a table cell possibly be gained by effectively capturing a snapshot bitmap of your cell after your complex UIView render&#39;s itself, and displaying that while scrolling and hiding your complex view? Obviously some pieces would have to be worked out. Just an interesting thought I had.


  [1]: http://atebits.tumblr.com/post/197580827/fast-scrolling-in-tweetie-with-uitableview
  [2]: http://engineering.twitter.com/2012/02/simple-strategies-for-smooth-animation.html
  [3]: http://volonbolon.net/post/634453483/optimizing-table-views-for-performance
  [4]: http://blog.giorgiocalderolla.com/2011/04/16/customizing-uitableviewcells-a-better-way/#comment-208
  [5]: http://nachbaur.com/blog/core-graphics-isnt-scary-honest
  [6]: http://developer.apple.com/library/ios/#samplecode/TableViewSuite/Listings/5_CustomTableViewCell_Classes_TimeZoneView_m.html#//apple_ref/doc/uid/DTS40007318-5_CustomTableViewCell_Classes_TimeZoneView_m-DontLinkElementID_42
  [7]: https://developer.apple.com/videos/wwdc/2011/?id=129
  [8]: http://www.amazon.com/iOS-Programming-Pushing-Limits-ebook/dp/B00AJPDJMC/ref=sr_1_2?ie=UTF8&amp;qid=1359786019&amp;sr=8-2&amp;keywords=ios6%20pushing%20the%20limits
  [9]: http://www.paintcodeapp.com
  [10]: http://screencast.com/t/jVbYIKiI
  [11]: https://developer.apple.com/videos/wwdc/2012/?id=238
  [12]: http://www.paintcodeapp.com

to drawRect or not to drawRect (when should one use drawRect/Core Graphics vs subviews/images and why?)

I have a series of user-customized images within an iOS app that are being animated in a simple, frame-by-frame flip book style.  

My question is this: is there a way to allow users to export their animation as an animated gif?  Ideally, I&#39;d like to enable them to email, social share (T/FB) or (worst case..) save an animated gif to their documents folder for retrieval via iTunes.   

I know how to save a .png to the photo library, and I found a way to record an animation as a QT file (http://www.cimgf.com/2009/02/03/record-your-core-animation-animation/), but I haven&#39;t found a way to just kick out a plain old animated gif.  Am I missing something in Core Animation or somewhere else? Are there any approaches, frameworks, or resources that anyone can recommend?  Sorry if the question is too general - struggling to find a starting point.


Create and export an animated gif via iOS?

I&#39;ve been trying to figure out a way to draw segments as illustrated in the following image:

![enter image description here][1]

I&#39;d like to:

 1. draw the segment
 2. include gradients
 3. include shadows
 4. animate the drawing from 0 to n angle

I&#39;ve been attempting to do this with `CGContextAddArc` and similar calls but not getting very far.

Can anyone help ?


  [1]: http://i.stack.imgur.com/oadFr.png

Draw segments from a circle or donut

Does anybody know of any controls that will replicate the iOS7 style blur views. 

I&#39;m assumming there can be some kind of UIView subclass that will replicate the behavior. 

I&#39;m talking about these type views which blur the background extremely thickly so that they have pull effects from the background view. 


![enter image description here][1]


![][2]


  [1]: http://i.stack.imgur.com/MIYZa.jpg
  [2]: http://i.stack.imgur.com/iUzLc.jpg

iOS 7 style Blur view

I&#39;m trying to learn JS and got an issue.

I tried many things and googled but all in vain. Following piece of code doesn&#39;t work as expected. I should get value of `i` on click but it always returns 6. I&#39;m pulling my hair out; please help.

    for (var i = 1; i &lt; 6; i++) {
    
        console.log(i);
    
        $(&quot;#div&quot; + i).click(
            function() {
                alert(i);
            }
        );
    }

[**jsfiddle**][1]


  [1]: http://jsfiddle.net/rmXcF/

JavaScript click handler not working as expected inside a for loop

What are the differences between jQuery `.mouseover()` and `.hover()` functions? If they are totally same why jQuery uses both?


  [1]: https://api.jquery.com/mouseover/
  [2]: https://api.jquery.com/hover/

When to choose mouseover() and hover() function?

I would like to simulate a whole click not just 

    document.getElementsByClassName()[0].click();

How do I do that?  Search results all seem to be about handling such events, not triggering them.



Simulating a mousedown, click, mouseup sequence in Tampermonkey?

How can you achieve either a hover event or active event in ReactJS when you do inline styling?

I&#39;ve found that the onMouseEnter, onMouseLeave approach is buggy, so hoping there is another way to do it.

Specifically, if you mouse over a component very quickly, only the onMouseEnter event is registered. The onMouseLeave never fires, and thus can&#39;t update state... leaving the component to appear as if it still is being hovered over. I&#39;ve noticed the same thing if you try and mimic the &quot;:active&quot; css pseudo-class. If you click really fast, only the onMouseDown event will register. The onMouseUp event will be ignored... leaving the component appearing active.

Here is a JSFiddle showing the problem: https://jsfiddle.net/y9swecyu/5/  

Video of JSFiddle with problem: https://vid.me/ZJEO

The code:

    var Hover = React.createClass({
        getInitialState: function() {
            return {
                hover: false
            };
        },
        onMouseEnterHandler: function() {
            this.setState({
                hover: true
            });
            console.log(&#39;enter&#39;);
        },
        onMouseLeaveHandler: function() {
            this.setState({
                hover: false
            });
            console.log(&#39;leave&#39;);
        },
        render: function() {
            var inner = normal;
            if(this.state.hover) {
                inner = hover;
            }
    
            return (
                &lt;div style={outer}&gt;
                    &lt;div style={inner}
                        onMouseEnter={this.onMouseEnterHandler}
                        onMouseLeave={this.onMouseLeaveHandler} &gt;
                        {this.props.children}
                    &lt;/div&gt;
                &lt;/div&gt;
            );
        }
    });
    
    var outer = {
        height: &#39;120px&#39;,
        width: &#39;200px&#39;,
        margin: &#39;100px&#39;,
        backgroundColor: &#39;green&#39;,
        cursor: &#39;pointer&#39;,
        position: &#39;relative&#39;
    }
    
    var normal = {
        position: &#39;absolute&#39;,
        top: 0,
        bottom: 0,
        left: 0,
        right: 0,
        backgroundColor: &#39;red&#39;,
        opacity: 0
    }
    
    var hover = {
        position: &#39;absolute&#39;,
        top: 0,
        bottom: 0,
        left: 0,
        right: 0,
        backgroundColor: &#39;red&#39;,
        opacity: 1
    }
    
    React.render(
        &lt;Hover&gt;&lt;/Hover&gt;,         
        document.getElementById(&#39;container&#39;)
    )



How do you Hover in ReactJS? - onMouseLeave not registered during fast hover over

I have a question regarding rounded corners and text background color for a custom `UIView`.

Basically, I need to achieve an effect like this (image attached - notice the rounded corners on one side) in a custom UIView:
![Background highlight][1]


  [1]: http://i.stack.imgur.com/BxJq5.png

I&#39;m thinking the approach to use is:

 - Use Core Text to get glyph runs.
 - Check highlight range.
 - If the current run is within the highlight range, draw a background rectangle with rounded corners and desired fill color before drawing the glyph run.
 - Draw the glyph run.

However, I&#39;m not sure whether this is the only solution (or for that matter, whether this is the most efficient solution).

Using a `UIWebView` is not an option, so I have to do it in a custom `UIView`.

My question being, is this the best approach to use, and am I on the right track? Or am I missing out something important or going about it the wrong way?

Content Type	Original Author	Original Content on Stackoverflow
Question	Dae	View Question on Stackoverflow
Solution 1 - Macos	Mauricio Gracia Gutierrez	View Answer on Stackoverflow
Solution 2 - Macos	Daniel	View Answer on Stackoverflow

Detecting CGAssociateMouseAndMouseCursorPosition

Macos Problem Overview

Macos Solutions

Solution 1 - Macos

Solution 2 - Macos

How to organize minitest/unit tests?

sublime text2 python error message /usr/bin/python: can't find 'main' module in ''

Attributions