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QLabel: set color of text and background
... I think it could be useful to anybody.
I step into the problem of setting RGBA colors (that is, RGB color with an Alpha value for transparency) for color display labels in my painting application.
As I came across the first answer, I was unable to set an RGBA color. I have also tried things like:
...
How to create a tag with Javascript?
...p; !window.opera)) {
styleNode.styleSheet.cssText = 'span { color: rgb(255, 0, 0); }';
} else {
var styleText = document.createTextNode('span { color: rgb(255, 0, 0); } ');
styleNode.appendChild(styleText);
}
document.getElementsByTagName('head')[0].appendChild(style...
How to debug a GLSL shader?
...o get lowest byte instead of three highest
gl_FrontColor=vec4(xAsColor.rgb,1);
else
gl_FrontColor=vec4(xAsColor.a,0,0,1);
After you get this on screen, you can just take any color picker, format the color as HTML (appending 00 to the rgb value if you don't need higher precision, and doing ...
Real world use cases of bitwise operators [closed]
...
I use them to get RGB(A) values from packed colorvalues, for instance.
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Programmatically saving image to Django ImageField
...put_file = StringIO()
img = Image.open(input_file)
if img.mode != "RGB":
img = img.convert("RGB")
img.save(output_file, "JPEG")
image.save(name+".jpg", ContentFile(output_file.getvalue()), save=False)
where image is the django ImageField or your_model_instance.image
here i...
How to make button look like a link?
... all common browsers:
button {
align-items: normal;
background-color: rgba(0,0,0,0);
border-color: rgb(0, 0, 238);
border-style: none;
box-sizing: content-box;
color: rgb(0, 0, 238);
cursor: pointer;
display: inline;
font: inherit;
height: auto;
padding: 0;
perspective-orig...
How to convert a PIL Image into a numpy array?
...lting array is in a different format than yours (3-d array or rows/columns/rgb in this case).
Then, after you make your changes to the array, you should be able to do either pic.putdata(pix) or create a new image with Image.fromarray(pix).
...
Printing Lists as Tabular Data
...rs by using the color option (by default it is set to None) and specifying RGB values.
Using the example from above:
import TableIt
myList = [
["", "a", "b"],
["x", "a + x", "a + b"],
["z", "a + z", "z + b"]
]
TableIt.printTable(myList, useFieldNames=True, color=(26, 156, 171))
The...
What's the best way to set a single pixel in an HTML5 canvas?
...() to draw a pixel (there should be no aliasing issues):
ctx.fillStyle = "rgba("+r+","+g+","+b+","+(a/255)+")";
ctx.fillRect( x, y, 1, 1 );
You can test the speed of these here: http://jsperf.com/setting-canvas-pixel/9 or here https://www.measurethat.net/Benchmarks/Show/1664/1
I recommend test...
How to get pixel data from a UIImage (Cocoa Touch) or CGImage (Core Graphics)?
...s and got the whole thing to compile. Here is the result:
+ (NSArray*)getRGBAsFromImage:(UIImage*)image atX:(int)x andY:(int)y count:(int)count
{
NSMutableArray *result = [NSMutableArray arrayWithCapacity:count];
// First get the image into your data buffer
CGImageRef imageRef = [imag...