Questions tagged [2d-context-api]
22 questions
3
votes
0 answers
Implementing filters on React Virtualized Table
Implementing filters on React Virtualized Infinite Loader.Every Time the filter is applied, the filtered data appends to the already rendered row instead of rendering the filtered data in the table.
Also Used Context API's to have a common source of…
NotSoTechie
- 31
- 1
- 2
3
votes
1 answer
How do you cache images to be drawn later in canvas2d in dart?
So, I got how to draw images in canvas using dart, which goes something like this:
///create the image element with given source
ImageElement myImage = new ImageElement(src:"myImage.png");
///load the image
…
Hassan Hayat
- 1,056
- 8
- 20
2
votes
2 answers
Canvas drawImage with high quality - Javascript
I'm using konva.js to draw elements on an HTML Canvas. When the user finishes its design in the canvas, the creation can be exported into a PDF file. In this context, my HTML structure is the following:
a div "canvas" to append all the canvas
a div…
soalrib
- 589
- 3
- 9
- 31
2
votes
2 answers
Edit a property in an array of objects in React based on an ID
I have an array of objects created in the new "Context API" like this ...
const reducer = (state, action) => {
switch (action.type) {
case "DELETE_CONTACT":
return {
...state,
contacts:…
Ruby
- 2,207
- 12
- 42
- 71
2
votes
3 answers
How to divide a circle into three equal parts with HTML5 canvas?
How can I divide a circle into three equal parts with HTML5 canvas 2D context API like above figure?
I was trying this
Can somebody suggest a better way? probably with percentages (or in degrees) instead of hard-coded coordinates?
var can =…
Mithun Sreedharan
- 49,883
- 70
- 181
- 236
1
vote
1 answer
React Native: How do I rerender only one specific flatlist item when changing its background color or other prop using context API and useReducer?
I need some help, I'm working on a small personal project, it is a quiz app, I have json data for questions, I'm using flat list to render quiz questions and each list item shows question on top and four options to choose correct answer from.
When…
Irfan Dev
- 11
- 2
1
vote
0 answers
Firebase Authentication using contextAPI and useReducer hook
I'm creating a shopping cart with both auth and cart functionality using firebase , so on the register functionality it throws no error at the console but its not registering as well
Here is my authReducer content together with the initialState…
Joshua Ndeleva
- 11
- 6
1
vote
1 answer
Context API is not Changing it's State at Global Level in React
This is My App.js File
import 'bootstrap/dist/css/bootstrap.min.css';
import Run from './Signupin/mainpage';
import Exp from './afterlogin/patirel/patmain';
import Exp1 from './afterlogin/adminrel/designdb';
import Exp2 from…
ABHI SHEK
- 85
- 6
1
vote
2 answers
Props value is Undefined while passing through Context API in REACT
My Provider File of Context API (Exp file)
import react form 'react';
import {createContext} from "react";
export const ContextforFile = createContext();
export function ContextData(props){
let rdata=props.data
return(
<>
{rdata}
…
ABHI SHEK
- 85
- 6
1
vote
1 answer
React Context data is empty after routed to next Page
I have a small dummy react application, I have created a "Home Page" after the user is logged on the home page context is set for user credentials from the home page and I am able to get it on the home page. but I have created another page "profile"…
nodeDev
- 131
- 1
- 11
1
vote
1 answer
Performance difference between 'source-over' and 'destination-over' globalCompositeOperation for HTML canvas
Having reviewed the various globalCompositeOperation options for drawing on a 2D canvas, it occurs to me that destination-over is essentially the same as the default source-over but with the elements drawn in reverse.
I was wondering if anyone knows…
Jared
- 718
- 5
- 11
0
votes
0 answers
Updated context not received in a different route in Nextjs app
I basically have a Nav component with Link to a add_repo page.
Now in my home page I set Context data to have an access token.
const response = await fetch("api/get-access-token", {
method: "POST",
…
jatin patel
- 1
- 2
0
votes
0 answers
Context Provider does not display records
I am working with Context API when I create context object and call in Film my Films are loading but when also working well but when I call this fav context object with my Films component it just load Film data and when we click the film it does not…
Iram Kahkashan
- 69
- 1
- 1
- 6
0
votes
2 answers
Scale canvas .arc to have different x and y radius
I am trying to create an arc function for CanvasRenderingContext2D that will allow the user to specify a horizontal and vertical radius (x and y radius). This is what I have so far:
function arc(x, y, w, h, start, stop) {
ctx.save();
…
Polar
- 11
- 1
- 2
0
votes
1 answer
When I wrap the index.js with my context provider I just see a blank page
When I wrap the index.js with my context provider I just see a blank page.
this is my context
import React, { createContext, Fragment, useState } from 'react';
const FavoriteContext = createContext({
favorites: [],
addFav: (favoriteCar) => {},
…
Berkay Sönmez
- 11
- 3