transparency – Page 2

How to create a semi transparent window in WPF that allows mouse events to pass through

July 31, 2023 by Tarik

I’ve had similar problem and found a solution: public static class WindowsServices { const int WS_EX_TRANSPARENT = 0x00000020; const int GWL_EXSTYLE = (-20); [DllImport(“user32.dll”)] static extern int GetWindowLong(IntPtr hwnd, int index); [DllImport(“user32.dll”)] static extern int SetWindowLong(IntPtr hwnd, int index, int newStyle); public static void SetWindowExTransparent(IntPtr hwnd) { var extendedStyle = GetWindowLong(hwnd, GWL_EXSTYLE); SetWindowLong(hwnd, GWL_EXSTYLE, extendedStyle … Read more

How to convert rgba to a transparency-adjusted-hex?

July 28, 2023 by Tarik

It depends on the background to which your transparent color will be applied. But if you know the color of the background (e.g. white), you can calculate the RGB color resulting of the RGBA color applied to the specific background. It’s just the weighted average between the color and the background, the weight being the … Read more

How to CREATE a transparent gif (or png) with PIL (python-imaging)

July 25, 2023 by Tarik

The following script creates a transparent GIF with a red circle drawn in the middle: from PIL import Image, ImageDraw img = Image.new(‘RGBA’, (100, 100), (255, 0, 0, 0)) draw = ImageDraw.Draw(img) draw.ellipse((25, 25, 75, 75), fill=(255, 0, 0)) img.save(‘test.gif’, ‘GIF’, transparency=0) and for PNG format: img.save(‘test.png’, ‘PNG’)

Adjusting Text background transparency

July 24, 2023 by Tarik

The alpha passed to plt.text() will change the transparency of the text font. To change the background you have to change the alpha using Text.set_bbox(): t = plt.text(0.5, 0.5, ‘text’, transform=ax.transAxes, fontsize=30) t.set_bbox(dict(facecolor=”red”, alpha=0.5, edgecolor=”red”)) #changed first dict arg from “color=”red”” to “facecolor=”red”” to work on python 3.6 To remove the border of the text … Read more

ImageButton doesn’t highlight on click with Transparent background

July 21, 2023 by Tarik

I came across this same problem. Finally, I got a sample of a code with that attribute: android:background=”?android:selectableItemBackground” This attibute will give a transparent background with selectable highlight to any View (Button, ImageButton, TextView…) WITHOUT MORE CODING!!!

How to make a surface with a transparent background in pygame

July 15, 2023 by Tarik

This should do it: image = pygame.Surface([640,480], pygame.SRCALPHA, 32) image = image.convert_alpha() Make sure that the color depth (32) stays explicitly set else this will not work.

Transparent hollow or cut out shape in HTML

June 28, 2023 by Tarik

You can achieve a transparent cut out circle with 2 different techniques : 1.SVG The following examples use an inline svg. The first snippet uses the mask element to cut out the transparent circle and the second hollow circle is made with a path element. The circle is made with 2 arc commands : With … Read more

How do I make a transparent border with CSS so that contents don’t shift position? [duplicate]

June 26, 2023 by Tarik

You can use “transparent” as a colour. In some versions of IE, that comes up as black, but I’ve not tested it out since the IE6 days. http://www.researchkitchen.de/blog/archives/css-bordercolor-transparent.php

PNG Transparency with PHP

June 11, 2023 by Tarik

I have had success doing it like this in the past: $thumb = imagecreatetruecolor($newwidth, $newheight); imagealphablending($thumb, false); imagesavealpha($thumb, true); $source = imagecreatefrompng($fileName); imagealphablending($source, true); imagecopyresampled($thumb, $source, 0, 0, 0, 0, $newwidth, $newheight, $width, $height); imagepng($thumb,$newFilename); I found the output image quality much better using imagecopyresampled() than imagecopyresized()

Is it possible to use transparency in an iPhone app icon?

June 9, 2023 by Tarik

Apple may have updated the interface guidelines since this question was asked, but transparency is now expressly not allowed. See more here: https://developer.apple.com/ios/human-interface-guidelines/icons-and-images/app-icon/