I am using element ui el-image. And I want to preview my image when clicked with (:preview-src-list). But When I click first time it doesnt preview anything. just add's my downloaded image. So I need to click 2 times. But I want to click 1 time.
Here is my template code:
<el-image :src="src"
:preview-src-list="srcList"
#click="imgClick"></el-image>
ts code:
src = null;
srcList = [];
product = 'shoe1';
imgClick() {
prevImg(product).then(resp => {
const url = window.URL.createObjectURL(new Blob([resp.data]));
this.srclist = [url];
});
}
#Watch("product")
changed(value) {
getProductImage(value).then(resp => {
const url = window.URL.createObjectURL(new Blob([resp.data]));
this.src = url;
}).catc(e => {
alert(e);
});
}
mounted() {
this.changed(product);
}
I think these things happen because when you click on that image it will trigger clickHandler:
...
clickHandler() {
// don't show viewer when preview is false
if (!this.preview) {
return;
}
...
}
...
From source
And the preview is the computed property:
...
preview() {
const { previewSrcList } = this;
return Array.isArray(previewSrcList) && previewSrcList.length > 0;
}
...
From source
So nothing happened in the first click but after that you set preview-src-list and click it again then it works.
If you code is synchronous you can use event like mousedown which will trigger before click event.
<el-image
:src="url"
:preview-src-list="srcList"
#mousedown="loadImages">
</el-image>
Example
But if you code is asynchronous you can use refs and call clickHandler after that.
...
// fetch something
this.$nextTick(() => {
this.$refs.elImage.clickHandler()
})
...
Example
Related
I am working with Angular5 , I have a big issue (please see the below code)
In simple words it is a asynchronous execution issue, how to reduce this
let confirmData = {
dlgHeader: 'Add',
msgTxt: 'Are you sure to Add Language!!',
eventName: 'locationmanagement_languages_assign'
};
this.confirmService.confirmData = confirmData;
(1) this.confirmationService.setShowConfirm(true);
(2) this.confirmAnchor.createConfirmation(ConfirmationComponent);
this.confirmService.getReturnValue()
.subscribe(
suc => {
if (suc.eventName == 'locationmanagement_languages_assign') {
this.assignLanguage(suc);
}
});
in above (1) line of code is responsible to create confirmation.(i have created custom confirmation component)
inside custom confirmation user can click CONFIRM/CANCEL buttons.
I want to stop (2) line code execution until user click CONFIRM/CANCEL buttons in custom confirmation component.
Now i am using as below in language.component.ts ,, but i am calling the getReturnValue() in ngOnInit().
I dont want to use ngOnInit() to get action from custom confirmation component either it is CONFIRM/CANCEL action
ngOnInit() {
this.getReturnValueEvent();
}
assignLanguageEvent() {
debugger;
this.requestedData = [];
for (let data of this.selectedAssignLanguages) {
this.requestedData.push({
id: data.value.id,
set_value: data.value.setValue
});
}
console.log('Requested Data::', this.requestedData);
let confirmData = {
dlgHeader: 'Add',
msgTxt: 'Are you sure to Add Language!!',
eventName: 'locationmanagement_languages_assign'
};
this.confirmService.confirmData = confirmData;
this.confirmationService.setShowConfirm(true);
this.confirmAnchor.createConfirmation(ConfirmationComponent);
}
getReturnValueEvent() {
this.subscription1 = this.confirmService.getReturnValue()
.subscribe(
suc => {
if (suc.eventName == 'locationmanagement_languages_assign') {
this.assignLanguage(suc);
}
}
);
}
I have a jquery data table that I am populating from a drop down on change event. I have two check boxes in the data table and I am running an onclick on the check boxes. But on the first click the jquery does not fire only when I click it a second time does the jquery fire, also happens on switching pages.I added the .on() for the click, because I researched and saw that dynamic controls would work that way. Is there something I'm missing also to get this click function to work on first click? Below is some of my code.
data table click on check box control no jquery click event on first click
data table click on check box control on second click
$('#my-table').on('click', function () {
var i = -1;
$("input[id*='secondary']:checkbox").on("click", function () {
if ($(this).is(':checked')) {
i = selectedIds.indexOf($(this).val());
if (i === -1) {
selectedIds.push($(this).val());
}
CheckedSecondary(this);
}
else {
jQuery(this).closest("tr").css("background-color", "");
if (selectedIds.length > 0) {
i = selectedIds.indexOf($(this).val());
if (i != -1) {
selectedIds.splice(i, 1);
}
}
if (!primaryChecked)
$(this).closest('tr').find('input[type="checkbox"]').not(this).attr('disabled', false);
}
});
$("#my-table").find("input[id*='primary']:checkbox").on("click", function () {
if ($(this).is(':checked')) {
primaryChecked = true;
primaryID = this.value;
CheckedPrimary(this);
}
else {
primaryID = "";
primaryChecked = false;
$(this).closest('tr').find('input[type="checkbox"]').not(this).attr('disabled', false);
$('input:checkbox[id^="primary"]').each(function () {
if (!$(this).closest('tr').find('input[type="checkbox"]').is(':checked'))
$(this).attr('disabled', false);
});
jQuery(this).closest("tr").css("background-color", "");
}
});
});
You're attaching click handler inside another click handler which doesn't make sense.
Remove first click handler:
$('#my-table').on('click', function () {
});
Attach the click handler to the checkboxes as follows:
$('#my-table').on('click', "input[id*='secondary']:checkbox", function () {
});
and
$('#my-table').on('click', "input[id*='primary']:checkbox", function () {
});
I want to remove selected file of kendo upload control on click event of another button and I followed the below link
Triggering OnCancel event of kendo upload on click of button the remove event fired but not clear the file below is my code. please can any one help me what i am doing wrong.
$(document).ready(function () {
$("#files").kendoUpload({
"multiple": false,
select: function (event) {
console.log(event);
var notAllowed = false;
$.each(event.files, function (index, value) {
if ((value.extension).toLowerCase() !== '.jpg') {
alert("not allowed! only jpg files!");
notAllowed = true;
}
else if (value.size > 3000000) {
alert("file size must less than 3MB ");
notAllowed = true;
}
if (event.files.length > 1) {
alert("Please select single file.");
e.preventDefault();
}
});
var breakPoint = 0;
if (notAllowed == true) event.preventDefault();
var fileReader = new FileReader();
fileReader.onload = function (event) {
var mapImage = event.target.result;
$("#sigimage").attr('src', mapImage);
document.getElementById("sigimage").style.display = 'block';
}
fileReader.readAsDataURL(event.files[0].rawFile);
},
remove: function (e) {
alert("remove");
e.preventDefault();
},
});
$("#closewindow").click(function (e) {
$("#files").data("kendoUpload").trigger("remove");
});
});
You can use the following code for removing the file inside your click function.
$(".k-delete").parent().click();
Please visit the fiddle here for a working example
You can create your custom function like this:
function remove(){
$(".k-upload-files").remove();
$(".k-upload-status").remove();
$(".k-upload.k-header").addClass("k-upload-empty");
$(".k-upload-button").removeClass("k-state-focused");
};
It will delete trigger delete of uploaded files.
Hi I have a problem and the error stated:- "Error: Target must be an event emitter."
If there is a change in fire variable and selectHandler is resumed, shouldn't the methods be triggered - toggleDropDown and focus?
Here's my code below:-
var fire = false;
var toggle1, toggle2 = true;
var select = new Select
({
store:storeA
}, 'node_Select');
select.startup();
fire = true;
var switchStore = new button
({
onClick: function()
{if (toggle1)
{
select.setStore(storeB);
toggle1 = false;
}
else
{
select.setStore(storeA);
toggle1 = true;
}
fire = true;
}
}, 'node_switchStore');
switchStore.startup();
var selectHandler = on.pausable(fire, 'change' function()
{
if(fire)
{
select.toggleDropDown();
select.focus();
fire=false;
}
})
var switchPause = new button
({
onClick: function()
{if (toggle2)
{
selectHandler.resume();
toggle2 = false;
}
else
{
selectHandler.pause();
toggle2 = true;
}
}
}, 'node_switchPause');
switchPause.startup();
What is event emitter? Only input change, button and DOM elements' events?
It seems that the fire variable is not event emitter, isn't it?
Please advise
Clement
It has to do with this line:
var selectHandler = on.pausable(fire, 'change' function()
You're trying to listen to one of javascripts primitive types, Boolean. In order for "dojo/on" to work, it has to listen to something that can fire off events. From what I'm seeing in your code sample, what you probably need is a function that handles the changing of the "fire" variable. How about something like this:
var openFire = function() {
select.toggleDropDown();
select.focus();
fire = false;
}
now instead of setting
fire=true;
you can just call
openFire();
We are using Durandal for our SPA application and came to a, in my opinion, common use case. We have two pages: one page is a list of entities (with filters, sorting, virtual scroll) and another is detail preview of an entity. So, user is on list page and set a filter and a list of results comes out. After scrolling a little bit down user notice an entity which he/she would like to see details for. So clicking on a proper link user is navigated to details preview page.
After "work finished" on preview page user click back button (in app itself or browser) and he/she is back on the list page. However, default 'entrance' transition scroll the page to the top and not to the position on list where user pressed preview. So in order to 'read' list further user have to scroll down where he/she was before pressing preview.
So I started to create new transition which will for certain pages (like list-search pages) keep the scroll position and for other pages (like preview or edit pages) scroll to top on transition complete. And this was easy to do however, I was surprised when I noticed that there are strange behavior on preview pages when I hit navigateBack 'button'. My already long story short, after investigation I found out that windows.history.back is completing earlier then the transition is made and this cause that preview pages are scrolled automatically down to position of previous (list) page when back button is hit. This scrolling have a very unpleasant effect on UI not mentioning that it is 'total catastrophe' for my transition.
Any idea or suggestion what could I do in this case?
Here is the code of transition. It is just a working copy not finished yet as far as I have this problem.
define(['../system'], function (system) {
var fadeOutDuration = 100;
var scrollPositions = new Array();
var getScrollObjectFor = function (node) {
var elemObjs = scrollPositions.filter(function (ele) {
return ele.element === node;
});
if (elemObjs.length > 0)
return elemObjs[0];
else
return null;
};
var addScrollPositionFor = function (node) {
var elemObj = getScrollObjectFor(node);
if (elemObj) {
elemObj.scrollPosition = $(document).scrollTop();
}
else {
scrollPositions.push({element: node, scrollPosition: $(document).scrollTop()});
}
};
var scrollTransition = function (parent, newChild, settings) {
return system.defer(function (dfd) {
function endTransition() {
dfd.resolve();
}
function scrollIfNeeded() {
var elemObj = getScrollObjectFor(newChild);
if (elemObj)
{
$(document).scrollTop(elemObj.scrollPosition);
}
else {
$(document).scrollTop(0);
}
}
if (!newChild) {
if (settings.activeView) {
addScrollPositionFor(settings.activeView);
$(settings.activeView).fadeOut(fadeOutDuration, function () {
if (!settings.cacheViews) {
ko.virtualElements.emptyNode(parent);
}
endTransition();
});
} else {
if (!settings.cacheViews) {
ko.virtualElements.emptyNode(parent);
}
endTransition();
}
} else {
var $previousView = $(settings.activeView);
var duration = settings.duration || 500;
var fadeOnly = !!settings.fadeOnly;
function startTransition() {
if (settings.cacheViews) {
if (settings.composingNewView) {
ko.virtualElements.prepend(parent, newChild);
}
} else {
ko.virtualElements.emptyNode(parent);
ko.virtualElements.prepend(parent, newChild);
}
var startValues = {
marginLeft: fadeOnly ? '0' : '20px',
marginRight: fadeOnly ? '0' : '-20px',
opacity: 0,
display: 'block'
};
var endValues = {
marginRight: 0,
marginLeft: 0,
opacity: 1
};
$(newChild).css(startValues);
var animateOptions = {
duration: duration,
easing : 'swing',
complete: endTransition,
done: scrollIfNeeded
};
$(newChild).animate(endValues, animateOptions);
}
if ($previousView.length) {
addScrollPositionFor(settings.activeView);
$previousView.fadeOut(fadeOutDuration, startTransition);
} else {
startTransition();
}
}
}).promise();
};
return scrollTransition;
});
A simpler approach could be to store the scroll position when the module deactivates and restore the scroll on viewAttached.
You could store the positions in some global app variable:
app.scrollPositions = app.scrollPositions || {};
app.scrollPositions[system.getModuleId(this)] = theCurrentScrollPosition;