javascript – 上下文菜单的定位

我在javascript for table中开发了一个右键单击上下文菜单.上下文菜单的位置在每行表格的光标下方.表格的最后一行是在页面的末尾,现在右键单击该行的上下文菜单正在下降但它应该显示在光标上.任何帮助请

function ContextShow(event) {

event = event || window.event;

var m = getMousePosition(event);
var s = getScrollPosition(event);
var client_height = document.body.clientHeight;
var display_context = document.getElementById('context_menu');

if(replaceContext){

        display_context.style.display = "block";
        display_context.style.left = m.x + s.x +  "px";
        display_context.style.top =  m.y + s.y +  "px";

        replaceContext = false;
    }}


function getMousePosition (e){
e =   e || window.event;
var position = {
    'x' : e.clientX,
    'y' : e.clientY
}
return position;}



function getScrollPosition(){
var x = 0;
var y = 0;

if( typeof( window.pageYOffset ) == 'number' ) {
    x = window.pageXOffset;
    y = window.pageYOffset;
} else if( document.documentElement && ( document.documentElement.scrollLeft || document.documentElement.scrollTop ) ) {
    x = document.documentElement.scrollLeft;
    y = document.documentElement.scrollTop;
} else if( document.body && ( document.body.scrollLeft || document.body.scrollTop ) ) {
    x = document.body.scrollLeft;
    y = document.body.scrollTop;
}

var position = {
    'x' : x,
    'y' : y
}

return position;

}

这里,contextShow将使用getMousePosition(event)显示基于鼠标位置的右键单击上下文菜单;和getScrollPosition(事件);

解决方法:

我使用以下函数来设置上下文菜单位置,它适用于我.

function setContextMenuPostion(event, contextMenu) {

    var mousePosition = {};
    var menuPostion = {};
    var menuDimension = {};

    menuDimension.x = contextMenu.outerWidth();
    menuDimension.y = contextMenu.outerHeight();
    mousePosition.x = event.pageX;
    mousePosition.y = event.pageY;

    if (mousePosition.x + menuDimension.x > $(window).width() + $(window).scrollLeft()) {
        menuPostion.x = mousePosition.x - menuDimension.x;
    } else {
        menuPostion.x = mousePosition.x;
    }

    if (mousePosition.y + menuDimension.y > $(window).height() + $(window).scrollTop()) {
        menuPostion.y = mousePosition.y - menuDimension.y;
    } else {
        menuPostion.y = mousePosition.y;
    }

    return menuPostion;
}

标签：javascript,contextmenu,right-click
来源： https://codeday.me/bug/20190621/1255407.html