Haven't coded in years, and started to play around with Google App Maker last week. As the title suggests, I have a couple questions.
I'm trying to figure out if there's a way to dynamically change the color of a button upon click. Right now I have the button changing enabled status to false on click, and using CSS style to change the color of disabled buttons to gray. Is there a way to do this without disabling the button?
Is there a way to wrap text in a button? Right now I am overlaying a Label on the button with the correctly styled font, but would ideally like to have that text be from the Button, as the space the label takes up is not clickable.
Thanks in advance for any help!
add some lines to your page or global styles this
this should let you wrap text.
.app-Button {
white-space: pre-wrap;
}
Say you want to change your button blue when a Boolean value gets changed to "true" in your data source.
add a class to your styles
.blue{
background: blue;
}
then select your button and in the property editor>Display>styles click the drop down and select binding
set the binding to
=#datasource.item.**YourBooleanItem** === true? ['blue']:[]
Clarification there are two steps
Define a CSS class
Add the Class to the "styles" property of
your widget.
The Answer above uses a "binding" but also means that you've got to have an Item with this binding which you may not want.
I wanted a 'decimal' button to be orange when it was active. So on the Page I created a DecimalActive property. I used the onAttach event to set this property to false.
I created a CSS Class (local to the page) named Orange and Normal
.Orange {background:orange};
.Normal {background:white};
Then the following is my onClick
onClick(widget,event)
{
widget.root.properties.DecimalActive = !widget.root.properties.DecimalActive;
widget.styles = widget.root.properties.DecimalActive ? ['Orange'] : ['White'];
}
The challenge was figuring out exactly what AppMaker wanted in the styles []. I don't think it puts applied styles in this array. At least they didn't show up when I console.log(JSON.stringify(widget.styles);
I have verified that this does work (Dec 2019)
I think this answer is clearer and if someone wants to bind it the color change they still can.
I can't understand how to make something like in this site: __smashingmagazine.com
If u resize the window, the search will be with a button. So... try to click on this search icon... the new div will appear with search input. and pay attention to the behavior of it: no matter what u gonna do next this div won't hide it self, but only if you click on 'x' that appear instead of search icon... and this is pure css, right?! how this possible...
I found this article:
Click here
but the behavior is very, very different... and i don't like it at all.
Any idea how to make it work like in the site above? anything would may help!
Thanks!
The example from Smashing Magazine uses the :target psuedo class to change the CSS of the elements when an anchor is clicked. Here's a simplified breakdown of how they've achieved that behaviour.
The anchor is configured to set a fragment identifier in the URL, in the case of Smashing Magazine this is #ms. The have an anchor like this:
Search
When clicked the fragment identifier is set to #ms, they then use this to make the search appear using the :target psuedo class.
#ms {
display: none;
}
#ms:target {
display: block;
}
When the fragment identifier is set to #ms, the :target styles are activated, displaying the search.
Here's a simple example: http://jsfiddle.net/we76L66h/
They are using :target with children (#ms:target + div.example) to also change the styling of children within the targeted element. This is how they make the button change to a "close" button when the #ms fragment identifier is set.
After trying to find a solution for Centering Text on a Button with Offset, I'm doing now a custom component.
The goal is to make a button-like component that has an icon on one side and a centered text filling the rest of the button.
The component contains either two Label/ Buttons to display the Icon and text. Both of them have a background Image, defined in css.
The css looks like this for Icon and the text with exchanged image as background for text
#button-icon-cancel{
-fx-font-family: "Arial";
-fx-padding: 0,0,0,0;
-fx-background-color: transparent;
-fx-font-size: 28px;
-fx-graphic: url('images/button/cancel.png');
}
#button-icon-cancel:pressed{
-fx-graphic: url('images/button/cancel-pressed.png');
}
The images are loaded by setId(). Currently both components are added to a Panel before passing to the stage. They contain an OnClickEvent for processing.
Now to the actual question
How can I achieve that if one Component is clicked, the other one is getting the :pressed from css as well?
Adding the ClickEvent to the Panel is doing nothing (regarding clicking on either Label/ Button)
Adding both of them to a HBox, adding the Event to the HBox work in that regard, that I can click either component and the Event gets fired, BUT the :pressed State is only applied to the component you clicked.
Is it possible to give all childs the notification, that they should behave like they got pressed? Since we have a lot of small Icon, but only one background for the text, placing a Label over the whole thing create a lot of unneeded wasted Image space. Also this would cause the problematic for changing font color if not all css are changed at once (the label-over-button-solution with .setMouseTransparent(true) wouldn't change the font color of the text label since the label doesn't notice button is pressed)
First of all, JFX-8 will support wider range of css improvements, which will allow you to solve the issue easier.
To solve your issue, i can suggest the following : each node have a pressed property. You can add a listener on this property, and when it changes to true, use setStyle(String) method on needed nodes, and use setStyle(null | "") on changing to false.
JSFiddle (The *:focus rule is to illustrate which element is marked as having focus.)
What I'm wondering is why, when I click a menu item, it gets the focus... but clicking a menu item does not give it focus.
What's wrong with the CSS to make it behave this way?
focus is generally only for elements that can receive keyboard or other input, so by this heuristic lis don't qualify. This question has more about it..
In the specs, CSS doesn't explicitly define what elements can be in those states, so it's hard to come up with a set rule for what can and can't be set to focus.
What might work for your purposes is active, which you can view here.
There is a small trick - if you want an item which not have focus anabled by default you should make it tabbable by seting its tabindex="N" - N is a number. As simple as that. if you add tabindex to your clickable items they will get focus when you click. If a tag can be tabbed it have to be able to get focus. Adding tabindex attribute to all nodes of the menu is very simple if you have jQuery loaded:
$(function() {
$('#navbar *').attr('tabindex', '1');
});
end everithing comes in place. You can do it using pure JavaScript of course.
I have a div that has background:transparent, along with border. Underneath this div, I have more elements.
Currently, I'm able to click the underlying elements when I click outside of the overlay div. However, I'm unable to click the underlying elements when clicking directly on the overlay div.
I want to be able to click through this div so that I can click on the underlying elements.
Yes, you CAN do this.
Using pointer-events: none along with CSS conditional statements for IE11 (does not work in IE10 or below), you can get a cross browser compatible solution for this problem.
Using AlphaImageLoader, you can even put transparent .PNG/.GIFs in the overlay div and have clicks flow through to elements underneath.
CSS:
pointer-events: none;
background: url('your_transparent.png');
IE11 conditional:
filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src='your_transparent.png', sizingMethod='scale');
background: none !important;
Here is a basic example page with all the code.
Yes, you CAN force overlapping layers to pass through (ignore) click events.
PLUS you CAN have specific children excluded from this behavior...
You can do this, using pointer-events
pointer-events influences the reaction to click-, tap-, scroll- und hover events.
In a layer that should ignore / pass-through mentioned events you set
pointer-events: none;
Children of that unresponsive layer that need to react mouse / tap events again need:
pointer-events: auto;
That second part is very helpful if you work with multiple overlapping div layers (probably some parents being transparent), where you need to be able to click on child elements and only that child elements.
Example usage:
.parent {
pointer-events:none;
}
.child {
pointer-events:auto;
}
<div class="parent">
I'm unresponsive
I'm clickable again, wohoo !
</div>
Allowing the user to click through a div to the underlying element depends on the browser. All modern browsers, including Firefox, Chrome, Safari, and Opera, understand pointer-events:none.
For IE, it depends on the background. If the background is transparent, clickthrough works without you needing to do anything. On the other hand, for something like background:white; opacity:0; filter:Alpha(opacity=0);, IE needs manual event forwarding.
See a JSFiddle test and CanIUse pointer events.
I'm adding this answer because I didn’t see it here in full. I was able to do this using elementFromPoint. So basically:
attach a click to the div you want to be clicked through
hide it
determine what element the pointer is on
fire the click on the element there.
var range-selector= $("")
.css("position", "absolute").addClass("range-selector")
.appendTo("")
.click(function(e) {
_range-selector.hide();
$(document.elementFromPoint(e.clientX,e.clientY)).trigger("click");
});
In my case the overlaying div is absolutely positioned—I am not sure if this makes a difference. This works on IE8/9, Safari Chrome and Firefox at least.
Hide overlaying the element
Determine cursor coordinates
Get element on those coordinates
Trigger click on element
Show overlaying element again
$('#elementontop').click(e => {
$('#elementontop').hide();
$(document.elementFromPoint(e.clientX, e.clientY)).trigger("click");
$('#elementontop').show();
});
I needed to do this and decided to take this route:
$('.overlay').click(function(e){
var left = $(window).scrollLeft();
var top = $(window).scrollTop();
//hide the overlay for now so the document can find the underlying elements
$(this).css('display','none');
//use the current scroll position to deduct from the click position
$(document.elementFromPoint(e.pageX-left, e.pageY-top)).click();
//show the overlay again
$(this).css('display','block');
});
I currently work with canvas speech balloons. But because the balloon with the pointer is wrapped in a div, some links under it aren't click able anymore. I cant use extjs in this case.
See basic example for my speech balloon tutorial requires HTML5
So I decided to collect all link coordinates from inside the balloons in an array.
var clickarray=[];
function getcoo(thatdiv){
thatdiv.find(".link").each(function(){
var offset=$(this).offset();
clickarray.unshift([(offset.left),
(offset.top),
(offset.left+$(this).width()),
(offset.top+$(this).height()),
($(this).attr('name')),
1]);
});
}
I call this function on each (new) balloon. It grabs the coordinates of the left/top and right/down corners of a link.class - additionally the name attribute for what to do if someone clicks in that coordinates and I loved to set a 1 which means that it wasn't clicked jet. And unshift this array to the clickarray. You could use push too.
To work with that array:
$("body").click(function(event){
event.preventDefault();//if it is a a-tag
var x=event.pageX;
var y=event.pageY;
var job="";
for(var i in clickarray){
if(x>=clickarray[i][0] && x<=clickarray[i][2] && y>=clickarray[i][1] && y<=clickarray[i][3] && clickarray[i][5]==1){
job=clickarray[i][4];
clickarray[i][5]=0;//set to allready clicked
break;
}
}
if(job.length>0){
// --do some thing with the job --
}
});
This function proofs the coordinates of a body click event or whether it was already clicked and returns the name attribute. I think it is not necessary to go deeper, but you see it is not that complicate.
Hope in was enlish...
Another idea to try (situationally) would be to:
Put the content you want in a div;
Put the non-clicking overlay over the entire page with a z-index higher,
make another cropped copy of the original div
overlay and abs position the copy div in the same place as the original content you want to be clickable with an even higher z-index?
Any thoughts?
I think the event.stopPropagation(); should be mentioned here as well. Add this to the Click function of your button.
Prevents the event from bubbling up the DOM tree, preventing any parent handlers from being notified of the event.
Just wrap a tag around all the HTML extract, for example
<a href="/categories/1">
<img alt="test1" class="img-responsive" src="/assets/photo.jpg" />
<div class="caption bg-orange">
<h2>
test1
</h2>
</div>
</a>
in my example my caption class has hover effects, that with pointer-events:none; you just will lose
wrapping the content will keep your hover effects and you can click in all the picture, div included, regards!
An easier way would be to inline the transparent background image using Data URIs as follows:
.click-through {
pointer-events: none;
background: url(data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7);
}
I think that you can consider changing your markup. If I am not wrong, you'd like to put an invisible layer above the document and your invisible markup may be preceding your document image (is this correct?).
Instead, I propose that you put the invisible right after the document image but changing the position to absolute.
Notice that you need a parent element to have position: relative and then you will be able to use this idea. Otherwise your absolute layer will be placed just in the top left corner.
An absolute position element is positioned relative to the first parent
element that has a position other than static.
If no such element is found, the containing block is html
Hope this helps. See here for more information about CSS positioning.
You can place an AP overlay like...
#overlay {
position: absolute;
top: -79px;
left: -60px;
height: 80px;
width: 380px;
z-index: 2;
background: url(fake.gif);
}
<div id="overlay"></div>
just put it over where you dont want ie cliked. Works in all.
This is not a precise answer for the question but may help in finding a workaround for it.
I had an image I was hiding on page load and displaying when waiting on an AJAX call then hiding again however...
I found the only way to display my image when loading the page then make it disappear and be able to click things where the image was located before hiding it was to put the image into a DIV, make the size of the DIV 10x10 pixels or small enough to prevent it causing an issue then hiding the containing div. This allowed the image to overflow the div while visible and when the div was hidden, only the divs area was affected by inability to click objects beneath and not the whole size of the image the DIV contained and was displaying.
I tried all the methods to hide the image including CSS display=none/block, opacity=0, hiding the image with hidden=true. All of them resulted in my image being hidden but the area where it was displayed to act like there was a cover over the stuff underneath so clicks and so on wouldn't act on the underlying objects. Once the image was inside a tiny DIV and I hid the tiny DIV, the entire area occupied by the image was clear and only the tiny area under the DIV I hid was affected but as I made it small enough (10x10 pixels), the issue was fixed (sort of).
I found this to be a dirty workaround for what should be a simple issue but I was not able to find any way to hide the object in its native format without a container. My object was in the form of etc. If anyone has a better way, please let me know.
I couldn't always use pointer-events: none in my scenario, because I wanted both the overlay and the underlying element(s) to be clickable / selectable.
The DOM structure looked like this:
<div id="outerElement">
<div id="canvas-wrapper">
<canvas id="overlay"></canvas>
</div>
<!-- Omitted: element(s) behind canvas that should still be selectable -->
</div>
(The outerElement, canvas-wrapper and canvas elements have the same size.)
To make the elements behind the canvas act normally (e.g. selectable, editable), I used the following code:
canvasWrapper.style.pointerEvents = 'none';
outerElement.addEventListener('mousedown', event => {
const clickedOnElementInCanvas = yourCheck // TODO: check if the event *would* click a canvas element.
if (!clickedOnElementInCanvas) {
// if necessary, add logic to deselect your canvas elements ...
wrapper.style.pointerEvents = 'none';
return true;
}
// Check if we emitted the event ourselves (avoid endless loop)
if (event.isTrusted) {
// Manually forward element to the canvas
const mouseEvent = new MouseEvent(event.type, event);
canvas.dispatchEvent(mouseEvent);
mouseEvent.stopPropagation();
}
return true;
});
Some canvas objects also came with input fields, so I had to allow keyboard events, too.
To do this, I had to update the pointerEvents property based on whether a canvas input field was currently focused or not:
onCanvasModified(canvas, () => {
const inputFieldInCanvasActive = // TODO: Check if an input field of the canvas is active.
wrapper.style.pointerEvents = inputFieldInCanvasActive ? 'auto' : 'none';
});
it doesn't work that way. the work around is to manually check the coordinates of the mouse click against the area occupied by each element.
area occupied by an element can found found by 1. getting the location of the element with respect to the top left of the page, and 2. the width and the height. a library like jQuery makes this pretty simple, although it can be done in plain js. adding an event handler for mousemove on the document object will provide continuous updates of the mouse position from the top and left of the page. deciding if the mouse is over any given object consists of checking if the mouse position is between the left, right, top and bottom edges of an element.
Nope, you can't click ‘through’ an element. You can get the co-ordinates of the click and try to work out what element was underneath the clicked element, but this is really tedious for browsers that don't have document.elementFromPoint. Then you still have to emulate the default action of clicking, which isn't necessarily trivial depending on what elements you have under there.
Since you've got a fully-transparent window area, you'll probably be better off implementing it as separate border elements around the outside, leaving the centre area free of obstruction so you can really just click straight through.