transparent

来源： https://stackoverflow.com/questions/17729433/html-png-image-transparent

来源： https://stackoverflow.com/questions/17729433/html-png-image-transparent

问题 I'm creating a round context menu using QFrame. To make round corner, I used Qt style sheet. Here is my CSS this->setStyleSheet("QFrame#ShareContextMenu{background-color:rgb(255,255,255); border-width:1px; border-color :rgb(0,0,0); border-radius:10px; border-style:solid;} QPushButton{background-color:rgba(255,255,255,0);} QPushButton::hover{background-color:rgba(125,125,125,50); border-radius:5px;}"); How can I remove the white background marked with red circles in this picture?. Edit: Here

问题 I am trying to use some video resources. And I wanna get rid of the background and change the color as I want. I used VideoView for easy implementation. However, it gave black background. I don't want that. So, I am trying to use TextureVideoView. implementation 'com.sprylab.android.texturevideoview:texturevideoview:1.2.1' However, when I play the webm files, it seems it's not transparency. What's the reason??? It's weird because I also exported and played a few clips to Webm with alpha

问题 Currently we get a free opaque white/black background for swiftUI modal. Is there anyway to remove the free opaque color and make the modal view transparent? In the image below, the end result should be able to see the image even with modal presented. 回答1: based on this code snippet you can create viewcontroller extension and modify your presentation. here is modified code: struct ViewControllerHolder { weak var value: UIViewController? init(_ value: UIViewController?) { self.value = value }

问题 I'm drawing an image using rgb pixel data. I need to set transparent background color for that image. What value I can set for alpha to be a transparent image? Or is there any other solution for this? 回答1: If I understand what you need, you basically want to turn specific colors on an image transparent. To do that you need to use getImageData check out mdn for an explanation on pixel manipulation. Heres some sample code var imgd = ctx.getImageData(0, 0, imageWidth, imageHeight), pix = imgd

问题 I'm drawing an image using rgb pixel data. I need to set transparent background color for that image. What value I can set for alpha to be a transparent image? Or is there any other solution for this? 回答1: If I understand what you need, you basically want to turn specific colors on an image transparent. To do that you need to use getImageData check out mdn for an explanation on pixel manipulation. Heres some sample code var imgd = ctx.getImageData(0, 0, imageWidth, imageHeight), pix = imgd

问题 I need to have a (crossdomain) iframe with dynamic width and height. My question is, Can I create an iframe with 100% size and a transparent background that will show the parent of this iframe, behind it ? Can I attach a css property or a transparent gif for the iframe background to make that effect ? Thanks. 回答1: yes you can (if i understand your question correctly) heres the code if you have edit access to the iframe content put this in the head (of the iframe) <style type="text/css"> <!--

问题 How can I make a transparent tabPage? I found solutions like set both Form's BackColor and TransparencyKey to a color like Color.LimeGreen or override OnPaintBackground with a empty method but TabPage doesn't have neither TransparencyKey property nor OnPaintBackground` method. How can I do that? 回答1: TabControl is a native Windows component, it always draws the tab pages opaque with no built-in support for transparency. Solving this requires a little helping of out-of-the-box thinking, a tab

问题 This question already has answers here : Shape with a slanted side (responsive) (3 answers) Closed 4 years ago . I want to be able to create a transparent background using only CSS but with an angle on one end. I've found various ways of trying to do it, but can't quite get it. I don't really want to use any scripting, just CSS. Background image would need to look like this: 回答1: You could do it using borders: http://jsfiddle.net/wNhjb/ #shape { height: 0; width: 80px; border-top: 80px solid