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CSS jQuery Basics (2014) Creating a Simple Drawing Application Perfect

Big Group
Big Group
16,464 Points

Hi Andrew, My drawing board is not working... Don't know why? No errors in the console

// Problem: No user interaction causes no changes to application // Solution: When user interacts cause changes appropriately

var color = $('.selected').css('background-color'); var $canvas = $('canvas'); var context = $canvas[0].getContext('2d'); var lastEvent; var mouseDown = false;

// When clicking on control list items $('.controls').on("click","li", function(){ // Deselect sibling elements $(this).siblings().removeClass('selected');

// Select clicked element $(this).addClass('selected');

// Cache current color color = $(this).css('background-color');

});

// When add color is pressed $('#revealColorSelect').click(function(){ // Show color select or hide select changeColor(); $('#colorSelect').toggle(); });

// Update the new color
function changeColor(){ var r = $('#red').val(); var g = $('#green').val(); var b = $('#blue').val();

$("#newColor").css('background-color', 'rgb(' + r + ', ' + g + ', ' + b + ')'); }

// When color sliders change $('input[type=range]').change(changeColor);

// When add color is pressed $('#addNewColor').click(function(){ // Append the color to the controls ul var $newColor = $('<li></li>'); $newColor.css('background-color', $("#newColor").css('background-color')); $('.controls ul').append($newColor); // Select the new color $newColor.click(); });

// On mouse events on the canvas $canvas.mousedown(function(e){ lastEvent = e; mouseDown = true; }).mousemove(function(e){ // Draw lines if(mouseDown){ context.beginPath(); context.moveTo(lastEvent.offsetX, lastEvent.offsetY); context.lineTo(e.offsetX, e.offsetY); context.strokeStyle = color; context.stroke(); lastEvent = e;

} }).mouseup(function(){ mouseDown = false;
});

1 Answer

Caesar Bell
Caesar Bell
24,827 Points

I found the following errors

//You have
var $newColor = $('');
//It is suppose to be as followed, because remember you will be appending the li to a ul 
var $newColor = ("<li></li>");