[英]What is the most efficient way to create a clickable grid with html/js?
[英]Most efficient way of creating a grid in HTML with CSS?
我需要創建一個網格,在每個單元格中應該有一個0或1。單擊時,這些單元格應該在0和1之間切換。懸停時,它應該顯示坐標(例如1,5)。
現在,讓我工作的唯一方法是創建三個div。 一個用於單元格(包含數字),一個用於坐標(動態添加該坐標),另一個用於div(包裝),該div將位於其他兩個頂部,並且該div將具有事件偵聽器。
因此,我要為單元格創建三個div,現在,如果它用於10x10網格,則可以完美地工作,但是當它變得更大時(64x64),瀏覽器將開始凍結。
這是HTML查找網格單元格的方式:
<div class="cell cellUnselected" id="cell_1_1" style="left: 0px; top: 0px;">0</div>
<div class="cellCoordinates cellCoordText" id="cell_1_1_coord" style="left: 0px; top: 0px;"></div>
<div class="cellWrapper" id="cell_1_1_wrapper" style="left: 0px; top: 0px;"></div>
我創建了一個有效的提琴: http : //jsfiddle.net/vicgonzalez25/Tfs2M/
問題:一旦通過創建這三個div開始使網格變得更大(例如64x64),瀏覽器就會開始凍結。 有沒有更有效的方法來進行此網格處理?
網格HTML:
<div id="grid" class="gridContainer">
<div class="cell cellUnselected" id="cell_1_1" style="left: 0px; top: 0px;">0</div>
<div class="cellCoordinates cellCoordText" id="cell_1_1_coord" style="left: 0px; top: 0px;"></div>
<div class="cellWrapper" id="cell_1_1_wrapper" style="left: 0px; top: 0px;"></div>
<div class="cell cellUnselected" id="cell_1_2" style="left: 36px; top: 0px;">0</div>
<div class="cellCoordinates cellCoordText" id="cell_1_2_coord" style="left: 36px; top: 0px;"></div>
<div class="cellWrapper" id="cell_1_2_wrapper" style="left: 36px; top: 0px;"></div>
</div>
為了重現:
HTML:
<div id="gridLayout" class="gridLayout">
<div id="gridHeader">
<h2>Aperture Configuration:</h2>
Grid Size:
<input id="rows" type="number" min="1" max="50" value="10" width="40" size="3" onChange="GRASP.start();">
x
<input id="cols" type="number" min="1" max="50" value="10" width="40" size="3" onChange="GRASP.start();">
</div>
<div id="grid" class="gridContainer"></div>
<div id="matrixHeader" style="position:absolute">
<h2>Auto Correlation:</h2>
</div>
<div id="matrix" class="autocorrMatrixContainer"></div>
</div>
Javascript:
(function(GRASP, $){
var GRID_ROWS,
GRID_COLS,
GRID_ELEMENT,
MATRIX_ROWS,
MATRIX_COLS,
MATRIXHEADER_ELEMENT,
MATRIX_ELEMENT,
A,C;
GRASP.config = {
gridContainer: "grid",
matrixContainer: "matrix",
matrixHeader: "matrixHeader"
};
GRASP.start = function(){
GRID_ROWS = $("#rows").val();
GRID_COLS = $("#cols").val();
MATRIX_ROWS = GRID_ROWS * 2 - 1;
MATRIX_COLS = GRID_COLS * 2 - 1;
createGrid();
createAutocorrelationMatrix();
};
function createGrid()
{
GRID_ELEMENT = $("#"+GRASP.config.gridContainer);
GRID_ELEMENT.html(""); // Clear Grid ;)
var coord;
var cell; // Contains the 1 or 0 based upon the cell selection
for(var i=1; i<=GRID_ROWS; i++){
for(var j=1; j<=GRID_COLS; j++){
coord = "" + i + "," + j;
$(document.createElement("div"))
.addClass("cellWrapper")
.attr("alt", coord)
.css("left", parseInt((j-1) * 36, 10) + "px")
.css("top", parseInt((i-1) * 36, 10) + "px")
.width(36).height(36)
.data("row", i).data("col", j)
.appendTo("#"+GRASP.config.gridContainer)
.on("click", cellClick)
.on("mouseenter", {isMatrix: false}, cellMouseEnter)
.on("mouseleave", cellMouseLeave);
$(document.createElement("div"))
.addClass("cell cellUnselected")
.attr("alt", coord)
.css("left", parseInt((j-1) * 36, 10) + "px")
.css("top", parseInt((i-1) * 36, 10) + "px")
.text("0")
.appendTo("#"+GRASP.config.gridContainer);
}
}
GRID_ELEMENT.height(36 * GRID_ROWS);
GRID_ELEMENT.width(36 * GRID_COLS);
}
function createAutocorrelationMatrix() {
MATRIXHEADER_ELEMENT = $("#" + GRASP.config.matrixHeader);
MATRIX_ELEMENT = $("#" + GRASP.config.matrixContainer);
MATRIX_ELEMENT.html("");
MATRIXHEADER_ELEMENT.css("top", parseInt(GRID_ELEMENT.offset().top + (GRID_ROWS * 36)) + "px");
MATRIX_ELEMENT.css("top", parseInt(MATRIXHEADER_ELEMENT.offset().top + MATRIXHEADER_ELEMENT.height()) + "px");
var cellSize = Math.ceil((GRID_ROWS * 36) / MATRIX_ROWS);
var coord;
for (var i=1;i<=MATRIX_ROWS;i++){
for (var j=1;j<=MATRIX_COLS;j++){
coord = "" + i + "," + j;
$(document.createElement("div"))
.addClass("autocorrMatrixCellWrapper")
.attr("alt", coord)
.css("left", parseInt((j-1) * cellSize, 10) + "px")
.css("top", parseInt((i-1) * cellSize, 10) + "px")
.data("row", i).data("col", j)
.appendTo("#"+GRASP.config.matrixContainer)
.on("mouseenter", {isMatrix: true}, cellMouseEnter)
.on("mouseleave", cellMouseLeave);
$(document.createElement("div"))
.addClass("autocorrMatrixCell autocorrMatrixCellUnselected")
.attr("alt", coord)
.css("left", parseInt((j-1) * cellSize, 10) + "px")
.css("top", parseInt((i-1) * cellSize, 10) + "px")
.appendTo("#"+GRASP.config.matrixContainer);
}
}
MATRIX_ELEMENT.height(36 * GRID_ROWS);
MATRIX_ELEMENT.width(36 * GRID_COLS);
}
function cellClick(){
var cell = $(this).next();
if(cell.text() == "0"){
cell.text("1");
} else {
cell.text("0");
}
}
function cellMouseEnter(e){
var i = $(this).data("row");
var j = $(this).data("col");
var x = e.data.isMatrix ? Math.ceil((GRID_ROWS * 36) / MATRIX_ROWS) : 36;
var div = $(document.createElement("div"))
.addClass("cellCoordinates cellCoordText")
.css("left", parseInt((j-1) * x, 10) + "px")
.css("top", parseInt((i-1) * x, 10) + "px")
.text(i + ", " + j);
$(this).before(div);
}
function cellMouseLeave(){
$(this).prev().remove();
}
}(window.GRASP = window.GRASP || {}, jQuery));
$(document).ready(function(){
GRASP.start();
});
CSS:
.gridContainer {
/* width: inherit; */
/* float: left; */
position: relative;
top: 10px;
padding: 0 0 0 0;
display: block;
background: none;
font-family: Arial, Helvetica, Verdana, sans-serif;
}
.cell {
width: 36px;
height: 36px;
position: absolute;
z-index: 0;
/*
font-size: 16pt;
*/
font-size: x-large;
font-weight: normal;
font-style: normal;
color: #888888;
text-align: center;
display: table-cell;
vertical-align: middle;
line-height: 2em;
/* padding-top: 0.25em; */
}
.cellSelected {
background: #00CCFF;
}
.cellUnselected {
background: none;
}
.cellCoordinates {
width: 36px;
height: 36px;
position: absolute;
background: none;
z-index: 1;
}
.autocorrMatrixContainer {
position: absolute;
/* float: left; */
/* bottom: 0px; */
display: block;
background: none;
font-family: Arial, Helvetica, Verdana, sans-serif;
}
.autocorrMatrixCell {
width: 16px;
height: 16px;
position: absolute;
z-index: 0;
font-size: xx-small;
font-weight: normal;
font-style: normal;
color: #FFFFFF;
text-align: center;
display: table-cell;
vertical-align: middle;
line-height: 2em;
/* padding-top: 0.25em; */
}
.autocorrMatrixCellWrapper {
width: 16px;
height: 16px;
position: absolute;
background: none;
z-index: 2;
border-style: solid outset;
border-width: 1px;
border-color: black;
font-size: x-small;
}
.autocorrMatrixCellCoordText {
font-size: xx-small;
font-weight: normal;
font-style: normal;
padding-top: 2px;
padding-left: 3px;
color: #444444;
text-align: left;
vertical-align: top;
}
.cellWrapper {
width: 36px;
height: 36px;
position: absolute;
background: none;
z-index: 2;
border-style: solid outset;
border-width: 1px;
border-color: black;
font-size: normal;
}
.cellCoordText {
font-size: x-small;
font-weight: normal;
font-style: normal;
padding-top: 2px;
padding-left: 3px;
color: #444444;
text-align: left;
vertical-align: top;
}
您正在執行以下操作:
divs
, div
創建三個處理程序( onclick
, onmouseenter
/ onmouceleave
)。 這給瀏覽器帶來了很多負擔。 您可以通過執行以下操作來大大降低負載:
divs
:一個帶有坐標(默認情況下是隱藏的),第二個帶有值; event.target
它將包含值,並且其鄰居將包含坐標; 需要處理的一點是:每個特定的div都沒有onmouseleave
; 您應該在event.target
更改之后運行諸如leave(prevDiv)
(考慮到將prevDiv
存儲在事件處理程序的末尾)。
重構好運!
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