有没有人使用带有 jquery 可拖动快照功能的 panzoom ?我需要缩放父 div (#canvas) 并允许子元素 (.draggable) 被拖动并相互对齐。除了缩放时,所有这些都非常有效。如果缩放/缩放,捕捉元素的位置将偏离几个像素。
我尝试了 css zoom、css transform(scale) ,但都导致了问题。我最初有一个常见的光标定位问题,其他人似乎有规模但能够解决这个问题。如果有人遇到此问题或有想法,我将感谢您的帮助....或者总是欢迎使用完全不同的方法。
这是一个 Codepen 示例,如果您拖动绿色瓷砖,则会显示问题:https ://codepen.io/5kyt3k/pen/Poomad
var menuWidth = 70; //Nav bar width (set in css file)
var canvasWidth = 1900; //#Canvas width (set in css file)
var currentZoom = ((window.innerWidth - menuWidth)/canvasWidth);
var currentScale = 1;
//Auto zoom #canvas to window size on load
$(document).ready(function () {
$('#canvas').panzoom({
disablePan: true,
startTransform: 'scale('+ currentZoom +')',
increment: 0.1,
$zoomIn: $("#zoom-in"),
$zoomOut: $("#zoom-out"),
});
$('#reset').click(function () {
$('#canvas').panzoom("zoom", currentScale); //Not Working
});
});
function dragTiles(){
$( ".draggable" ).draggable({
zIndex: 100,
snap: ".driver",
snapTolerance: 20,
revert : function(droppableContainer){
if(droppableContainer) {
//alert('valid');
}else {
//alert('invalid');
}
return(droppableContainer)
},
//containment: '#canvas',
start: function(e){
$(this).removeClass('prevent');
var pz = $("#canvas");
//we need current scale factor to adjust coordinates of dragging element
currentScale = pz.panzoom("getMatrix")[0];
$(this).css("cursor","move");
pz.panzoom("disable");//disable panzoom to avoid double offset
},
drag:function(e,ui){
//fix scale issue
ui.position.left = ui.position.left/currentScale;
ui.position.top = ui.position.top/currentScale;
},
stop: function(e,ui){
$(this).addClass('prevent');
$(this).css("cursor","");
//enable panzoom back
$("#canvas").panzoom("enable");
}
})
$(".tile-content").droppable({
accept: '.draggable',
});
};
$( ".add" ).click(function() {
var item = $('#name').val();
var dsc = $('#dsc').val();
var type = $('#type').val().toLowerCase().replace(/ /g,'-');
if(item !== null && item !== ''){
$('#canvas').append('<div class="draggable '+ type +' prevent" name="'+ item +'" type="'+ type +'"><div class="tile-content">' + item + '<span class="dsc">' + dsc + '</span></div></div>');
dragTiles();
removeTile();
} else{
console.log('empty');
}
});