javascript - Angular Custom Directives: Calling a function with arguments from within the link function -

-

i'm building list of clickable options filtered input, using custom directive.

html:

<combobox      input-model="mymodel"      options="mylist"      option-label="label"     option-select="selectfn()"></combobox>

the directive (simplified):

app.directive("combobox", function() {     return {         restrict: "e",         replace: true,         template: "<input type=‘text’ ng-model=‘inputmodel’ />" +                       "<button ng-repeat='option in options | " +                                          "filter: inputmodel’" +                               "ng-mousedown=‘optionselected(option)’" +                       ">{{option[optionlabel]}}</button>",         scope: {             inputmodel: "=",             options: "=",             optionlabel: "@",             optionselect: "&"         },         link: function(scope, elem, attrs) {             scope.optionselected  = function(option) {                 // stuff here...                 scope.optionselect();             }         }     } })

scope:

$scope.mylist = [     { label: "first option", value: 1 },     { label: "second option", value: 2 },     { label: "second option", value: 2 } ] $scope.selectfn() = function() {     // doing stuff here... }

but want call selectfn properties option called it. like:

option-select=“selectfn(option.value)”

or 

scope.optionselect(option);

is possible? can call function in scope , pass arguments within link function?

for customization reasons, cannot use combo box library, ui-select.

you passing result of function, evaluated in parent scope, instead of function itself. can evaluate expression , execute resulting function.

so, should try this

<combobox      input-model="mymodel"      options="mylist"      option-label="label"     option-select="selectfn">

in markup, , in directive

    link: function(scope, elem, attrs) {         scope.optionselected  = function(option) {             // stuff here...             scope.optionselect()(option);         }     }

notice expression in option-select="selectfn" handed isolate scope wrapped in optionselect function. when evaluate it, function want. that's why use scope.optionselect()(option)

see directive working here: http://plnkr.co/edit/zgymbisygnt4ijffvj6g

from https://docs.angularjs.org/api/ng/service/$compile

& or &attr - provides way execute expression in context of parent scope. if no attr name specified attribute name assumed same local name. given , widget definition of scope: { localfn:'&myattr' }, isolate scope property localfn point function wrapper count = count + value expression. it's desirable pass data isolated scope via expression parent scope, can done passing map of local variable names , values expression wrapper fn. example, if expression increment(amount) can specify amount value calling localfn localfn({amount: 22})


Comments

Post a Comment

Popular posts from this blog

python - TypeError: start must be a integer -

-
i trying draw 5 turtles, getting typeerror on line 25. here code: import turtle wn = turtle.screen() redrose = turtle.turtle() color = input("what background color be?") fillcolor_f = input("what color of rose be?") redrose.hideturtle() redrose.speed(30) redrose.penup() redrose.left(180) redrose.forward(175) redrose.right(90) redrose.forward(30) redrose.right(90) redrose.pendown() def drawrose(red): redrose.color("pink") redrose.fillcolor(fillcolor_f) redrose.fill(true) in range(red): redrose.forward(i) redrose.right(49) in range(5): drawrose(redrose) redrose.penup() redrose.forward(350) redrose.right(144) redrose.pendown() redrose.fill(false) drawrose(50) wn.bgcolor(color) i trying draw 5 roses, produces errors. doing in interactivepython.org. you recursively calling drawrose wrong parameter. on line 23 ( for in range(red): ) expect red integer...
Read more

c# - DevExpress RepositoryItemComboBox BackColor property ignored -

-
i have following code almost works properly; private void cbstatus_drawitem(object sender, listboxdrawitemeventargs e) { string item = e.item string; if (item != null) { switch (item) { case "1": e.appearance.forecolor = color.green; e.appearance.backcolor = color.green; break; case "2": e.appearance.forecolor = color.orange; e.appearance.backcolor = color.orange; break; case "3": e.appearance.forecolor = color.red; e.appearance.backcolor = color.red; break; } } } when dropdown shown, items forecolor correct, backcolor remains whatever backcolor of theme is; i.e. if i've got set dark theme, backcolor dark, cells in gridview, rather being green/orange/red. i've tried setting e.appearance.options.usebackcolor trying set e....
Read more

django - Creating multiple model instances in DRF3 -

-
1) create multiple model instances 1 api call, asked here: how create multiple model instances django rest framework? tried solution named in link, no success. i trying upload multiple files in 1 api call. result: files uploaded (only once overwrote perform_create) 1 instance created (if send 2 files, latter created instance). my code: class fileuploadserializer(serializers.modelserializer): def __init__(self, *args, **kwargs): many = kwargs.pop('many', true) super(fileuploadserializer, self).__init__(many=many, *args, **kwargs) class meta: model = fileupload read_only_fields = ('created', 'datafile', 'owner') class fileuploadviewset(viewsets.modelviewset): queryset = fileupload.objects.all() serializer_class = fileuploadserializer parser_classes = (multipartparser, formparser, ) def perform_create(self, serializer): file_list = self.request.data.getlist('file') ...
Read more