The BluePrintJS React InputGroup component is great and convenient for modern user-interface. But unfortunately the React component do not allow access to the <input> element inside.
I need to access the input element for 2 main reasons :
if I have 50 InputGroups in my form, I don't want to write 50 OnChange() callbacks. When the user finishes all inputs, I want to get all InputGroup.value(), which is not possible (it is possible with regular input element thanks to HTMLInputElement.value, but InputGroup does not allow accessing internal input)
At form displaying, I need to focus on first field. InputGroup has no function focus(), while HTMLInputElement has one.
Briefly there are 2 functions missing in InputGroup : GetValue() and Focus() , and I cannot see why they are missing.
Any suggestion will be greatly appreciated.
Thanks a lot.
I found the way of getting the input ! with :
inputRef={(input:HTMLInputElement) => {
this.logininput=input;
}}
(didn't see it at first time).
Now I have the input object, I can set focus at "didmount", and I can get the value with logininput.value.
Thanks
Slightly different variation but this works too:
inputRef:(input:HTMLInputElement | null) => {
// your code here
return input;
}
}}
just be aware that code runs when you just render the component, depending on your usage, to me happens when I click the child control on a select.
In my case, I just wanted to modify an input that works for text search on a select.
Related
I am trying to get the active item from this menu list to display in a different style. When I reload the page, the style gets applied for a split second, then disappears and all items share the exact same style.
There is a similar thread saying the solution is to actually have the item available as a data property in that component. I have tried that too, and it would not work. It makes more sense to have all the data from a computed property since I am using Vuex for data storing.
The template:
<li class="topic"
v-for="topic in topics"
:key="topic"
#click="selectTopic($event, topic)"
:class="{'active': topic === current}"
>
{{topic}}</li>
and the script:
computed: {
topics: function(){
return this.$store.state.topics
},
current: function() {
return this.$store.state.current_topic
}
},
The current_topic is updated with the selectTopic method in this component. It all works fine, except I can't get the current_topic to have a distinctive style.
Oh, on the styles I simply have .topic.active {border:yellowgreen solid 0.5em;}. If I do topic:active then the style gets applied when I click but only for the time I am clicking (also if I hold), but it does not get applied when reload not even for a split second.
Any leads? thank you :-)
Just as a conclusion / closing of this thread. The code I presented is correct. The problem had to do with a getter which was converting the current_topic into a title. This is why topic and current did not match inside the class binding. I figure it is still worth leaving the thread since it might be helpful for somebody else dealing with class binding inside a v-for.
I'm using Polymer and I am encountering a Problem. I think there is a good solution, but I still don't have the perfect understanding of polymer.
In my template I get a dom-repeat which gets me some _itemsas item. item.name returns the name of the item, it works just fine. Now I want to use this name to display it in a tooltip, so I call the function on-mouseenter="_showTooltip".
My function looks like this:
_showTooltip: function(e) {
var item = Polymer.dom(e).rootTarget;
//........here I get Information out of my item to use it in my tooltip and display it
}
How can I transfer the information of my original item to this function?
Thanks in advance!
You did not mention or tag which version of Polymer you're using so I will point you to the docs for Polymer 2 because that's what I use, but I am guessing something similar must exist for Polymer 3 also.
Any event triggered from elements rendered inside a dom-repeat will get a model key added, under which you will have the context, so you will have your item from HTML there.
You can see that in the docs here.
To start you can try to:
_showTooltip: function(e) {
var item = Polymer.dom(e).rootTarget;
//........here I get Information out of my item to use it in my tooltip and display it
console.log(e.model); debugger;
}
and continue from there..
I am trying to get the following behavior in react using redux. I have two side by side components both have a <input> textfield that displays the same value. When I edit either of the field's, I want to dispatch an action and have redux store update the state of my app in both components
Exactly like asana app.
when I edit the field on left it updates the field on the right side as well
and when i edit the field on right, It updates the text field on left as well
I can only get it working one way and not both ways. I am using the value prop of the <input> textfield and keeping a state variable to update the <input> textfield as described in
react-docs.
I have state variable in one component and other one directly listens to the props.
I tried using the defaultValue prop if <input> textfield but it runs into other problems of not updating value when switching between different items
Hard to answer this without seeing your code, but based on what you're saying it sounds like you are storing one input's value on state?
If I want a value to be linked to a global store, I wouldn't store it on state. I'd do something like this (a bit pseudocody but hopefully you get the idea!)
onChange: function (e) {
this.props.dispatch(updateName(e.target.value));
},
render: function() {
return (
<input value={this.props.name} onChange={this.onChange} />
);
}
The dispatch causes an update to the global store which then cascades that updated name value back down to the react component you are currently typing in, as well as the other input elsewhere that is populated by the same data.
I am wondering if there is a way that I can get the current element that is triggering the onBeforeChangeEvent function in jsViews. I want to get the current element that it is working on, to do some extra jQuery work on it.
A basic example is below:
$.views.helpers({
onAfterChange: function (ev)
{
//want to get element instance right here as an example.....
if (!PageSettings.cancelUpsert && ev.type == "change")
{
//do somthing to element that is currently being processed.
}
}
});
I searched through the objects being returned, but could find a stable way to get to the element. Any ideas, or tips towards where to look would greatly be appreciated. Thanks!
If you are looking for a data-linked element, such as an input: <input data-link="..." />, whose change event triggered the change, you can get that from either this.linkCtx.elem or ev.target.
More generally, the this pointer is the view object that is being changed.
There are a number of helper methods on the view object that you can use to access different elements within that view. For example this.contents("someSelector") will return a jQuery object that selects top-level elements in that view, and this.contents(true, "someSelector") will apply the selector to filter on all elements in the view (deep search not just top-level).
(You can use the selector "*" to get all elements)
Flex 3 question:
I trying here to avoid having to bind resources to all my components labels ( ie a button) and find a way to have this automated.
Problem:
It corrupts the layout in design mode to bind directly in the mxml label="{resourceManager.getString('myResources', 'submit')}" and makes the design view useless. but when declaring bindings elsewhere, in actionScript or via a bind tag, it is counter productive and prone to many errors and miss.
Proposition:
I would like to create my own button that automatically invoke resources to localize a button label. So the author puts "Submit" in the mxml description of my button, and when running it would take the value of the label ie "submit" and use resourceManager.getString('myResources', 'submit').
but I can't find the way to override the set label function, Is it possible if yes how? else how can I go about it?
Maybe I am missing an essential process here that would make the use of resources more elegant, as well as how to override such thing as a button's label.
Thanks for your advices.
Create a component called MyButton, extending Button. Then use this:
override public function set label(value:String):void {
super.label = resourceManager.getString('myResources', value) || value;
}
Assuming the resource manager returns "null" or "undefined" this will work, and will only replace the value if it exists in "myResources".
If you don't want to override every component you need to do this with, then you can add a FlexEvent.CREATION_COMPLETE event on every component. Then use a single generic function to do your label localization.