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Real mouse position in canvas [duplicate]
...mouse handler, you can get the mouse X/Y like this:
function handleMouseDown(e){
mouseX=parseInt(e.clientX-offsetX);
mouseY=parseInt(e.clientY-offsetY);
}
Here is an illustrating code and fiddle that shows how to successfully track mouse events on the canvas:
http://jsfiddle.net/m1...
GestureDetect 扩展：手势检测扩展，识别滑动、点击和长按手势 · App Inventor 2 中文网
... Community 论坛帖子整理，原作者为 AryanGupta。
原始链接：https://community.kodular.io/t/free-gesturedetect-recognize-swipe-up-down-right-left-and-doubleclick/94542
文档翻译和整理：AI2中文网
最后更新：2024年12月9日
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Gzip versus minify
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The downsize on minification depends on a lot of factors.... one of them is how much you code is commented. More comments, more savings. Anyway... minification is important today specially because of mobile users.
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How accurately should I store latitude and longitude?
... 0.111 m
7 0.0000001 1.11 cm
8 0.00000001 1.11 mm
ref : https://en.wikipedia.org/wiki/Decimal_degrees#Precision
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How do you manage databases in development, test, and production?
...se Migrator.NET. This allows you to version your database and move up and down between versions. Your schema is specified in C# code.
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Which is faster: while(1) or while(2)?
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Voted down because I'm sick of conventions. The developer has this puny opportunity to write a number he likes, then someone boring comes and nags about why it isn't 1.
– Utkan Gezer
Aug 11 '1...
Bash function to find newest file matching pattern
...cut -d' ' -f2
For a more useful script, see the find-latest script here: https://github.com/l3x/helpers
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How do I clear a search box with an 'x' in bootstrap 3?
...cel button with the CSS used in the following example:
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"/>
<style>
input[type="search"]::-webkit-search-cancel-button {
-webkit-appearance: searchfield-cancel-button;
}
<...
How do I keep two side-by-side divs the same height?
... you are developing a responsive design and you want your second div to go down in smaller screens you will need to set .row to display: block; in your media query.
– Nick Zulu
Dec 30 '13 at 2:10
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Timer function to provide time in nano seconds using C++
...moves from one processor to another...
However this StackOverflow answer https://stackoverflow.com/a/4588605/34329 states that QPC should work fine on any MS OS after Win XP service pack 2.
This article shows that Windows 7 can determine if the processor(s) have an invariant TSC and falls back to...