THE PROBLEM
I'm having a minor problem dragging elements onto a scalable div container.
Once the element is actually in the container, the elements drag fine and work the way they are supposed to.
Larger elements that are dragged onto the scalable container don't have too much of an issue.
But when smaller elements are dragged, you can see that the mouse is no longer attached to said element and when it is dropped, it drops a little off where it is supposed to drop.
I'm trying to find a solution that my mouse stays on the element and it drops where it is supposed to drop.
I've solved problems bit by bit and you can see below but this is the last piece of the puzzle that's driving me mad. If anyone has the time to lend a hand, it would be greatly appreciated.
Here is a codepen - click and drag the two blue elements onto the white container to try it out
Codepen
Full Screen View
Short GIF in Action
This wil help making sure that the droppable area works with a scaled container.
$.ui.ddmanager.prepareOffsets = function(t, event) {
var i, j, m = $.ui.ddmanager.droppables[t.options.scope] || [],
type = event ? event.type : null,
list = (t.currentItem || t.element).find(":data(ui-droppable)").addBack();
droppablesLoop: for (i = 0; i < m.length; i++) {
if (m[i].options.disabled || (t && !m[i].accept.call(m[i].element[0], (t.currentItem || t.element)))) {
continue;
}
for (j = 0; j < list.length; j++) {
if (list[j] === m[i].element[0]) {
m[i].proportions().height = 0;
continue droppablesLoop;
}
}
m[i].visible = m[i].element.css("display") !== "none";
if (!m[i].visible) {
continue;
}
if (type === "mousedown") {
m[i]._activate.call(m[i], event);
}
m[i].offset = m[i].element.offset();
m[i].proportions({
width: m[i].element[0].offsetWidth * percent,
height: m[i].element[0].offsetHeight * percent
});
}
};
Enable the element to be resizable on a scaled container
function resizeFix(event, ui) {
var changeWidth = ui.size.width - ui.originalSize.width,
newWidth = ui.originalSize.width + changeWidth / percent,
changeHeight = ui.size.height - ui.originalSize.height,
newHeight = ui.originalSize.height + changeHeight / percent;
ui.size.width = newWidth;
ui.size.height = newHeight;
}
Makes it so drag works on a scaled container
function dragFix(event, ui) {
var containmentArea = $("#documentPage_"+ui.helper.parent().parent().attr('id').replace(/^(\w+)_/, "")),
contWidth = containmentArea.width(), contHeight = containmentArea.height();
ui.position.left = Math.max(0, Math.min(ui.position.left / percent , contWidth - ui.helper.width()));
ui.position.top = Math.max(0, Math.min(ui.position.top / percent, contHeight- ui.helper.height()));
}
Creating a draggable element that I can drag onto the box.
.directive('draggableTypes', function() {
return {
restrict:'A',
link: function(scope, element, attrs) {
element.draggable({
zIndex:3000,
appendTo: 'body',
helper: function(e, ui){
var formBox = angular.element($("#formBox"));
percent = formBox.width() / scope.templateData.pdf_width;
if(element.attr('id') == 'textbox_item')
return $('<div class="text" style="text-align:left;font-size:14px;width:200px;height:20px;line-height:20px;">New Text Box.</div>').css({ 'transform': 'scale(' + percent + ')', '-moz-transform': 'scale(' + percent + ')', '-webkit-transform': 'scale(' + percent + ')', '-ms-transform': 'scale(' + percent + ')'});
if(element.attr('id') == 'sm_textbox_item')
return $('<div class="text" style="text-align:left;font-size:14px;width:5px;height:5px;line-height:20px;"></div>').css({ 'transform': 'scale(' + percent + ')', '-moz-transform': 'scale(' + percent + ')', '-webkit-transform': 'scale(' + percent + ')', '-ms-transform': 'scale(' + percent + ')'});
}
});
}
};
})
Create draggable/resizable elements that may already be in the box and applying the drag/resize fix to these
.directive('textboxDraggable', function() {
return {
restrict:'A',
link: function(scope, element, attrs) {
element.draggable({
cursor: "move",
drag: dragFix,
start: function(event, ui) {
var activeId = element.attr('id');
scope.activeElement.id = activeId;
scope.activeElement.name = scope.templateItems[activeId].info.name;
scope.$apply();
}
});
element.resizable({
minWidth: 25,
minHeight: 25,
resize: resizeFix,
stop: function( event, ui ) {
var activeId = element.attr('id');
scope.activeElement.duplicateName = false;
scope.activeElement.id = activeId;
scope.activeElement.name = scope.templateItems[activeId].info.name;
scope.templateItems[activeId]['style']['width'] = element.css('width');
scope.templateItems[activeId]['style']['height'] = element.css('height');
scope.$apply();
}
})
}
};
})
What happens when an item is dropped
.directive('droppable', function($compile) {
return {
restrict: 'A',
link: function(scope,element,attrs){
element.droppable({
drop:function(event,ui) {
var draggable = angular.element(ui.draggable),
draggable_parent = draggable.parent().parent(),
drag_type = draggable.attr('id'),
documentBg = element,
x = ui.offset.left,
y = ui.offset.top,
element_top = (y - documentBg.offset().top - draggable.height() * (percent - 1) / 2) / percent,
element_left = (x - documentBg.offset().left - draggable.width() * (percent - 1) / 2) / percent,
timestamp = new Date().getTime();
//just get the document page of where the mouse is if its a new element
if(draggable_parent.attr('id') == 'template_builder_box_container' || draggable_parent.attr('id') == 'template_builder_container')
var documentPage = documentBg.parent().parent().attr('id').replace(/^(\w+)_/, "");
//if you are dragging an element that was already on the page, get parent of draggable and not parent of where mouse is
else var documentPage = draggable_parent.parent().parent().attr('id').replace(/^(\w+)_/, "");
if(drag_type == "textbox_item")
{
scope.activeElement.id = scope.templateItems.push({
info: {'page': documentPage,'name': 'textbox_'+timestamp, 'type': 'text'},
style: {'text-align':'left','font-size':'14px','top':element_top+'px','left':element_left+'px', 'width':'200px', 'height':'20px'}
}) - 1;
scope.activeElement.name = 'textbox_'+timestamp;
}
else if(drag_type == "sm_textbox_item")
{
scope.activeElement.id = scope.templateItems.push({
info: {'page': documentPage,'name': '', 'type': 'text'},
style: {'text-align':'left','font-size':'14px','top':element_top+'px','left':element_left+'px', 'width':'5px', 'height':'5px'}
}) - 1;
scope.activeElement.name = 'textbox_'+timestamp;
}
else {
scope.templateItems[scope.activeElement.id]['style']['top'] = draggable.css('top');
scope.templateItems[scope.activeElement.id]['style']['left'] = draggable.css('left');
}
scope.$apply();
}
});
}
};
})
last but not least, my controller
.controller('testing', function($scope, $rootScope, $state, $stateParams) {
$scope.templateItems = [];
$scope.activeElement = { id: undefined, name: undefined };
$scope.templateData = {"id":"12345", "max_pages":1,"pdf_width":385,"pdf_height":800};
$scope.clickElement = function(index) { $scope.activeElement = { id: index, name: $scope.templateItems[index].info.name } }
});
Here is the basis of my html
<div id="formBox" ng-style="formbox(templateData.pdf_width)" zoom>
<div class="trimSpace" ng-style="trimSpace(templateData.pdf_width)" zoom>
<div id="formScale" ng-style="formScale(templateData.pdf_width)" zoom>
<form action="#" id="{{ templateData.id }}_form">
<div ng-repeat="key in [] | range:templateData.max_pages">
<div class="formContainer" id="{{ templateData.id + '_' + (key+1) }}" ng-style="{width: templateData.pdf_width+'px', height: templateData.pdf_height+'px'}">
<div class="formContent">
<div class="formBackground" id="documentPage_{{ (key+1) }}" droppable>
<div ng-hide="preview" ng-repeat="item in templateItems">
<div ng-if="item.info.page == (key+1) && item.info.type == 'text'" id="{{ $index }}" data-type="{{ item.info.type }}" ng-click="clickElement($index)" class="text" ng-style="item.style" textbox-draggable>{{ item.info.name }}</div>
</div>
</div>
</div>
</div>
</div>
</form>
</div>
</div>
</div>
For the cursor position while dragging, see this answer : Make Cursor position in center for ui.helper in jquery-ui draggable method
Basically, you can control the cursor position of the instance, allowing to have something more dynamic that cursorAt. Like this:
start: function(event, ui){
$(this).draggable('instance').offset.click = {
left: Math.floor(ui.helper.width() / 2),
top: Math.floor(ui.helper.height() / 2)
}
},
Then on the drop, you need to take into account the transform, but you can simplify by using the helper coordinates instead of the draggable. Like this:
element_top = (ui.helper.offset().top / percent) - (documentBg.offset().top / percent);
element_left = (ui.helper.offset().left / percent) - (documentBg.offset().left / percent);
Result: https://codepen.io/anon/pen/jamLBq
It looks like what is causing this to look strange is the following:
First, the small div is styled as display: block. This means that even though it looks like the div is small, that element actually stretches out to it's whole container.
Second, once you show the dragged square on the left screen, the relation between the mouse cursor and the element whole is technically centered, but you are cutting the size of the original element to a smaller one, and when the width and height get diminished, the result is rendered with the new width and height starting from the upper left corner of the original div. (If you style the small button to be display: inline, you can see what I mean. Try grabbing it from the upper left corner and the try the lower right one. You will see that the former looks fine but the latter is off).
So my suggestions are:
Make the draggabble elements display: inline
Make the dragged element on the left screen the exact height and width of the original element on the right screen.
Hope that helps!
I've forked your codepen and played around with it.
Take a look at it HERE, and see if it helps you find the "bug".
For your draggable script, I changed the code to this, adding margin-left and margin-right:
if(element.attr('id') == 'sm_textbox_item') { /* the small draggable box */
var el = {
pos: element.offset(), // position of the small box
height: element.outerHeight() + 20,
left: 0
}
var deduct = $('#formBox').innerWidth() - 20; // width of the element that's left of small box's container
el.left = el.pos.left - deduct;
return $('<div class="text" style="text-align:left; font-size:14px; width:5px; height:5px; line-height:20px;"></div>')
.css({
'margin-left': el.left + 'px',
'margin-top': el.pos.top - el.height + 'px',
'transform': 'scale(' + percent + ')',
'-moz-transform': 'scale(' + percent + ')',
'-webkit-transform': 'scale(' + percent + ')',
'-ms-transform': 'scale(' + percent + ')'
});
}
Then, for your droppable script, I changed the formula for element_top and element_left:
// old formula
element_top = (y - documentBg.offset().top - draggable.height() * (percent - 1) / 2) / percent
element_left = (x - documentBg.offset().left - draggable.width() * (percent - 1) / 2) / percent
// new formula
element_top = (y - documentBg.offset().top) / (percent * 0.915)
element_left = (x - documentBg.offset().left) / (percent * 0.915)
It gives an "almost" accurate result, but you may be able to tweak it further to polish it. Hope this helps.
For attaching elements with cursor during dragging you just need to use
cursorAt: { top: 6, left: -100 }
And a little change in top and left parameters of "sm_textbox_item".
top: (y - documentBg.offset().top) / (percent) + "px",
left: (x - documentBg.offset().left) / (percent) + "px",
For the large box again some tweak in top and left element is required (pen updated).
top: element_top-3,
left: element_left+6.49,
I forked your pen and did some changes. I know that this is not a perfect solution, i am also trying to solve this bit by bit. You can check it here
#ITWitch is right, there have to be some bug in draggable().
Style margin: 0 auto; in #sm_textbox_item is the source of problem.
Try to add this to draggable options in your draggableType directive to correct the position:
cursorAt: {left: -parseInt(window.getComputedStyle(element[0],null,null)['margin-left'])},
This problem occurs when you add a transform to a element's style, then make it draggable. You'll have to make do without transform to have a perfect result. I spent 2 days debugging till I found it out, and I didn't want someone else to go through that pain.
How do I make the center of the div as the center point for the rotation.
I came across this while I was doing some research but I can't seem to fit it in to mine.
This is what the post has suggested. But doesn't work.
$(area).css('-webkit-transform-origin', 'rotate(' + dgR + 'deg)');
function rot(e, area) {
var offset = area.offset();
var ceX = (offset.left) + ($(area).width() /2);
var ceY = (offset.top) + ($(area).height() /2);
var muX = e.pageX;
var muY = e.pageY;
var rdi = Math.atan2(muX-ceX, muY-ceY);
var dgR = (rdi * (180/Math.PI)*-5);
$(area).css('transform', 'rotate(' + dgR + 'deg)');
$(area).css('-webkit-transform', 'rotate(' + dgR + 'deg)');
$(area).css('-o-transform', 'rotate(' + dgR + 'deg)');
$(area).css('-ms-transform', 'rotate(' + dgR+'deg)');
}
You're using the transform-origin incorrect.
$(area).css('-webkit-transform-origin', '50% 50%');
This should place the rotation origin point in the middle of the area
When I got you right, you just want to rotate a div in it's center point, aren't you? Here you have to define the center point with transform-origin: 50% 50%; in your div.
Heres a fiddle to play around (without jscript): http://jsfiddle.net/nub0umft/
I'm trying to create a jQuery script that changes background-position x px to the left or right according to mouse movements (starting from background-position:center).
Here's what I have so far: http://jsfiddle.net/multiformeingegno/KunZ4/530/
$("#salone").bind('mousemove', function (e) {
$(this).css({
backgroundPosition: e.pageX + 'px ' + e.pageY + 'px'
});
});
Problem is it doesn't start from background-position:center and when I move the mouse the background-image starts from mouse position and reveals the white background.
I'd like it to move from the center to the left/right according to mouse movements. And also adjust the speed of the background-position change (animate?).
Just subtract the position you want to start from:
backgroundPosition: (e.pageX-650) + 'px ' + (e.pageY-410) + 'px'
to change the speed adjust the factor for the mouse position:
backgroundPosition: (e.pageX*2-650) + 'px ' + (e.pageY*2-410) + 'px'
Is double as fast.
http://jsfiddle.net/KunZ4/538/
For the calculation of the background center you could just take the image path, append it to an invisible image and get the width and height.
var url = $('#myDiv').css('background-image').replace('url(', '').replace(')', '').replace("'", '').replace('"', '');
var bgImg = $('<img />');
bgImg.hide();
scope = this;
bgImg.bind('load', function()
{
scope.height = $(this).height();
scope.width = $(this).width();
});
$('#myDiv').append(bgImg);
bgImg.attr('src', url);
var centerX = scope.width/2;
var centerY = scope.height/2;
No you can use centerX and centerY to center your image.
Took the center calculation from here:
How do I get background image size in jQuery?
I have an image that needs to be rotated. This image is oriented either landscape or portrait.
I have an HTML5 form to accept the degrees of rotation with a step 90 each click. When this value changes, the image should rotate and resize. It should always be 770px wide, but can be as tall as it needs to be.
I've written the following event handler, but it doesn't work the way I'd expect.
Use Case: When the image is portrait, it's initial values are 770x1027 (w x h). When rotating it 90 degrees, I would expect the below function to rotate the image, set the width = 1027 and height = 770. But what I'm seeing is that both width and height are being set to 770. What am I not seeing?
$("#degrees").change(function(){
var element$ = $("#photo-submission"),
w = element$.width(),
h = element$.height(),
deg = $(this).val();
element$.removeAttr("style").attr({
"style": "-webkit-transform:rotate("+ deg +"deg); width: "+ h +"px; height: "+ w + "px;"
})
});
You seem to have switched your width and height.
element$.removeAttr("style").attr({
"style": "-webkit-transform:rotate("+ deg +"deg); width: "+ w +"px; height: "+ h + "px;"
})
How about trying it with the jQuery method actually made for changing CSS properties, that way it would be easier to keep track of your variables and place them in the right places :
$("#degrees").change(function(){
var el = $("#photo-submission"),
w = el.width(),
h = el.height(),
deg = this.value;
el.css({
'-webkit-transform' : 'rotate(' +deg+ 'deg)',
width : w,
height : h
});
});
FIDDLE
The real advantage of this is that you don't have to set the width and height to what it already is, which is basically what you're doing, so this is enough
$("#degrees").change(function(){
$("#photo-submission").css({
'-webkit-transform' : 'rotate(' + this.value + 'deg)'
});
});
Something I've wanted to learn for quite a time now, but haven't been able to figure out.
http://jsfiddle.net/Mobilpadde/Xt7ag/
Then you move the mouse, it follows, which is the easy part, but I want to rotate too, like always look in the direction of the mouse, but not so static, more like, if you move your mouse up, it should kinda rotate first, and then you move the mouse further away, it should begin to follow again (If you know what I mean).
Is that something simple to do, or 3k lines? (Or maybe a jQuery plugin?)
Hiya I got it something more closer by using an old post of mine : demo http://jsfiddle.net/Z3pGQ/3/
I am still working, will flick you more smoother version or if you can improve before me:
Old post: Rotating an element based on cursor position in a separate element
Hope it helps, I am trying to make it smoother now, cheers
Sample code
$(document).ready(function() {
$(document).mousemove(function(e) {
$(".firefly").css({
"top": (e.pageY * 2) + "px",
"left": (e.pageX * 2 + 130) + "px"
});
})
})
var img = $(".firefly");
if (img.length > 0) {
var offset = img.offset();
function mouse(evt) {
var center_x = (offset.left) + (img.width() / 2);
var center_y = (offset.top) + (img.height() / 2);
var mouse_x = evt.pageX;
var mouse_y = evt.pageY;
var radians = Math.atan2(mouse_x - center_x, mouse_y - center_y);
var degree = (radians * (180 / Math.PI) * -1) + 90;
img.css('-moz-transform', 'rotate(' + degree + 'deg)');
img.css('-webkit-transform', 'rotate(' + degree + 'deg)');
img.css('-o-transform', 'rotate(' + degree + 'deg)');
img.css('-ms-transform', 'rotate(' + degree + 'deg)');
}
$(document).mousemove(mouse);
}
Image
This is going to involve a lot more math than I want to do right now, but you can apply rotations with css easily. Here are the properties for mozilla and webkit, you can see the rest of the (IE,Opera...) at this page. Here is your function with a 120deg rotation applied. You will still need to calculate the proper rotation, and adjust the left and top accordingly.
$(document).mousemove(function(e){
$(".firefly").css({
"top":(e.pageY*2)+"px",
"left":(e.pageX*2+130)+"px",
"-moz-transform": "rotate(120deg)",
"-webkit-transform": "rotate(120deg)"});
})
There is a jQuery plugin for that http://pixelscommander.com/en/iphone-development/rotate-html-elements-with-mouse/