alpha

enable user interaction by changing alpha swift iOS

由 混江龙づ霸主 提交于 2020-01-11 12:58:14
问题 I have a view with the tap function (user interaction is enabled). If I set it without changing alpha it works well. But if I try to change alpha of this view with delay, it cannot be tapped during this animation. Could somebody help? Here is my code: import UIKit class ViewController: UIViewController { var myView = UIView() var n = 0 override func viewDidLoad() { super.viewDidLoad() setView() changeAlpha() } func changeAlpha() { UIView.animate(withDuration: 5) { self.myView.alpha = 0.1 } }

How to set opacity of background colour of graph wit Matplotlib

由 只谈情不闲聊 提交于 2020-01-08 19:40:21
问题 I've been playing around with Matplotlib and I can't figure out how to change the background colour of the graph, or how to make the background completely transparent. 回答1: If you just want the entire background for both the figure and the axes to be transparent, you can simply specify transparent=True when saving the figure with fig.savefig . e.g.: import matplotlib.pyplot as plt fig = plt.figure() plt.plot(range(10)) fig.savefig('temp.png', transparent=True) If you want more fine-grained

How to set opacity of background colour of graph wit Matplotlib

由 大兔子大兔子 提交于 2020-01-08 19:40:02
问题 I've been playing around with Matplotlib and I can't figure out how to change the background colour of the graph, or how to make the background completely transparent. 回答1: If you just want the entire background for both the figure and the axes to be transparent, you can simply specify transparent=True when saving the figure with fig.savefig . e.g.: import matplotlib.pyplot as plt fig = plt.figure() plt.plot(range(10)) fig.savefig('temp.png', transparent=True) If you want more fine-grained

Rust 1.0.0-alpha 即将释出

由 走远了吗. 提交于 2020-01-07 19:16:37
【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> Rust 1.0.0-alpha 即将释出 发行说明和参考资料： Version 1.0.0-alpha (January 2015) ---------------------------------- * ~2300 changes, numerous bugfixes * Highlights * The language itself is considered feature complete for 1.0, though there is a significant amount of cleanup and bugfixes remaining. * Nearly 50% of the public API surface of the standard library has been declared 'stable'. Those interfaces will not change. * Most crates that are not `std` have been moved out of the Rust distribution into the Cargo ecosystem so they can evolve separately and don't need to be

Rust 1.0.0-alpha 释出

由 不打扰是莪最后的温柔 提交于 2020-01-07 18:28:47
【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 今天Rust 1.0.0-alpha 按计划如期释出。 有几个地方或以帮助大家感受这一门语言 1、官方提供的《 A 30-minute Introduction to Rust 》。可以在30分钟内对Rust语言有基本的了解。 2、官方出版的电子书 《 The Rust Programming Language 》。 官方首次发布该电子书，也是官方发布的第一本编程书，相比之前为新手准备的Guide，该书更有层次，更全面，还有很多编程实践在里面，可以更好地 帮助新手系统的了解语言的全貌。 【推荐】 3、由Steve Klabnik维护的《 Rust by Example 》。它为Rust的每功能点提供一个示例程序，并且由浅入深、分门别类的组织在一起，学完一个示例可以按下一步，继续学习第二个示例，为新手提供了一个良好的实践向导。此外它还提供了一个可以做实验的沙盒，用户不用安装Rust也可以写代码，做实验。 【推荐】 详细请看：http://doc.rust-lang.org/1.0.0-alpha/ 来源： oschina 链接： https://my.oschina.net/u/10896/blog/365726

Uncaught TypeError: Cannot read property 'alpha' of undefined 报错解决

由 匆匆过客 提交于 2020-01-06 22:17:06
先附上报错的代码： < ! DOCTYPE html > < html lang = "en" > < head > < meta charset = "UTF-8" > < title > 动态改变图片的焦点 < / title > < / head > < body > < script type = "text/javascript" > function visible ( cursor , i ) { if ( i == 0 ) cursor . filters . alpha . opacity = 100 ; else cursor . filters . alpha . opacity = 50 ; } < / script > < table border = "0" cellspacing = "0" cellpadding = "0" > < tr > < td align = "center" > < img src = "images/3.jpg" border = "0" style = "filter:alpha(opacity=100)" onMouseOver = "visible(this,1)" onMouseOut = "visible(this,0)" width = "148" HEIGHT = "148" > < / td > < /

UIView not transparent to all views underneath

由 不打扰是莪最后的温柔 提交于 2020-01-05 05:48:09
问题 I am working on an iOS application and I am having the following problem: I have a UIView which background color has alpha = 0.8 , but I do not want it to be see-through for all elements underneath it. I am making it transparent by adding the following code to its Draw(CGRect rect) method: var gctx = UIGraphics.GetCurrentContext(); gctx.AddEllipseInRect(new CGRect(rect.Location, rect.Size)); gctx.SetFillColor(UIColor.FromRGB(255, 255, 255).ColorWithAlpha(0.8f).CGColor); However, in this way

How do I set the WINDOWCLASSX hbrBackground alpha channel? (C++)

由 淺唱寂寞╮ 提交于 2020-01-04 18:30:35
问题 So, I have a WINDOWCLASSX that I want to set the background to, including the alpha channel, but I only saw an "RGB" macro; no RGBA. So how do I set alpha on hbrBackground? Here is my code: WNDCLASSEX wincl; wincl.hInstance = hThisInstance; wincl.lpszClassName = szClassName; wincl.lpfnWndProc = WindowProcedure; wincl.style = CS_DBLCLKS; wincl.cbSize = sizeof (WNDCLASSEX); wincl.hIcon = LoadIcon (GetModuleHandle(0), MAKEINTRESOURCE(IDI_MYAPP)); wincl.hIconSm = LoadIcon (GetModuleHandle(0),

Seamlessly layering transparent sprites in OpenGL ES

由 你离开我真会死。 提交于 2020-01-04 09:59:15
问题 I am working on an Android app, based on the LibGDX framework (Though I don't think that should affect this problem too much), and I am having trouble finding a way to get the results I want when drawing using transparent sprites. The problem is that the sprites visibly layer on top of each other where they overlap, similar to what is displayed in this image : This is pretty unsightly for some of what I want to do, and even completely breaks other parts. What I would like them to do is merge
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