gradient

The OnPaintBackground method is never invoked for control derived from Button

≡放荡痞女 提交于 2019-11-29 17:03:13
I've made a class GradientButton which suppose to be a Button which is filled with gradient background. I draw gradient filling in the OnPaintBackground() method. Unfortunately it is never invoked, of course I added a GradientButton to a Form via toolbox: public class GradientButton : Button { public Color Color1 { get; set; } public Color Color2 { get; set; } public float Angle { get; set; } public GradientButton() { Color1 = Color.YellowGreen; Color2 = Color.LightGreen; Angle = 30; } protected override void OnPaintBackground(PaintEventArgs e) { base.OnPaintBackground(e); Debug.WriteLine(

Issue with ComposeShader on Android 4.1.1

独自空忆成欢 提交于 2019-11-29 17:02:48
问题 I'm just trying to implement a color picker for my android application, and ran into a strange issue on Android 4.1.1. The following code does not create the expected gradients on Android 4.1.1, but it does on 2.3.7: Shader fadeInRight = new LinearGradient(0, 0, pWidth, 0, 0x00000000, 0xFF000000, Shader.TileMode.CLAMP); Shader blackToWhite = new LinearGradient(0, 0, 0, pHeight, 0xFF000000, 0xFFFFFFFF, Shader.TileMode.CLAMP); Shader whiteMask = new ComposeShader(blackToWhite, fadeInRight,

How to fill matplotlib bars with a gradient?

若如初见. 提交于 2019-11-29 16:54:59
I would be very interested in filling matplotlib/seaborn bars of a barplot with different gradients exactly like done here (not with matplotlib as far as I understood): I have also checked this related topic Pyplot: vertical gradient fill under curve? . Is this only possible via gr-framework: or are there alternative strategies? Just as depicted in Pyplot: vertical gradient fill under curve? one may use an image to create a gradient plot. Since bars are rectangular the extent of the image can be directly set to the bar's position and size. One can loop over all bars and create an image at the

Gradient status bar with BottomNavigationView

痴心易碎 提交于 2019-11-29 16:10:41
In my Application I want to show gradient status bar. Also i have used BottomNavigationView . So issue is when i am doing status bar gradient the bottom navigation bar of android overlaps the BottomNavigationView . I have tried below solutions : how to set status bar background as gradient color or a drawable in android Google Now gradient/shadow on status bar & navigation bar How to apply gradient to status bar in android? How to remove button bar at the bottom screen My code is as below : -- > In java code i tried : if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) { Window w =

Color interpolation between 3 colors

孤街浪徒 提交于 2019-11-29 15:11:34
问题 I use the following equation to get a nice color gradient from colorA to colorB, but I have no idea how to do the same for 3 colors, so the gradient goes from colorA to colorB to colorC colorT = colorA * p + colorB * (1.0 - p); where "p" is the a percentage from 0.0 to 1.0 Thanks 回答1: Well, for 3 colors, you can just to the same with p = 0.0 to 2.0: if p <= 1.0 colorT = colorA * p + colorB * (1.0 - p); else colorT = colorB * (p - 1.0) + colorC * (2.0 - p); Or scale it so you can still use p =

Fast computation of a gradient of an image in matlab

半世苍凉 提交于 2019-11-29 14:41:07
问题 I was trying to optimize my code and found that one of my code is a bottleneck. My code was : function [] = one(x) I = imread('coins.png'); I = double(I); I = imresize(I,[x x]); sig=.8; % scale parameter in Gaussian kernel G=fspecial('gaussian',15,sig); % Caussian kernel Img_smooth=conv2(I,G,'same'); % smooth image by Gaussiin convolution [Ix,Iy]=gradient(Img_smooth); f=Ix.^2+Iy.^2; g=1./(1+f); % edge indicator function. end I tried to run it like this : clear all;close all; x=4000;N=1; tic

Animating Linear Gradient using CSS

独自空忆成欢 提交于 2019-11-29 14:15:17
I want to move my gradient that has multiple colors smoothly but the problem is that the animation is not smooth it just changes its position at every step. here is <style> .animated { width:300px; height:300px; border:1px solid black; animation:gra 5s infinite; animation-direction:reverse; -webkit-animation:gra 5s infinite; -webkit-animation-direction:reverse; animation-timing-function:linear; -webkit-animation-timing-function:linear; } @keyframes gra { 0% { background: -webkit-gradient(linear, left top, right bottom, color-stop(0%, #ff670f), color-stop(21%, #ff670f), color-stop(56%, #ffffff)

OpenCV: how to apply rainbow gradient map on an image?

强颜欢笑 提交于 2019-11-29 14:08:26
问题 Say we had an image we somehow modified via openCV: And now we would love to apply to it Gradient Map (like one we can apply via photoshop): So I wonder how to apply gradient map (rainbow colors) via openCV? 回答1: Here is a method to create false/pseudo-color images using Python, conversion to c++ should be very straightforward. Overview: Open your image as grayscale, and RGB Convert the RGB image to HSV (Hue, Saturation, Value/Brightness) color space. This is a cylindrical space, with hue

How to make cells have a gradient background?

前提是你 提交于 2019-11-29 12:50:10
I have inserted a table view on my view controller and I was wondering how can I give the cells in the table view a gradient background? Can I edit each cell individually to give it a different color gradient background for each cell? For example, each cell is labeled after an index in the trainingLevels array, how could I make to where each has a different color gradient background? Here's my code: import UIKit class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSource { var trainingLevels = ["Ball Handling", "Shooting", "Defense", "Advanced Drills", "Vertimax Drills",

Can you use rgba colours in gradients produced with Internet Explorer’s filter property?

穿精又带淫゛_ 提交于 2019-11-29 11:54:23
Internet Explorer’s filter CSS property ( -ms-filter from IE 8) allows you to do CSS gradients, a bit like the -webkit-gradient and -moz-gradient properties (see e.g. question 213750 ). However, the syntax doesn’t seem to allow for rgba colours, so you can’t do a gradient from a colour to transparent. Is there any way to achieve gradients that end in transparency in IE? Stop colors can be specified in #AARRGGBB notation, where AA represents the alpha. For example, #ffff0000 is fully-opaque red. This produces a 100% red to 50% black horizontal gradient: filter: progid:DXImageTransform.Microsoft