用户按下回车键时的角度 ui-grid 过滤器 [英] angular ui-grid filter when user presses enter key

问题描述

我已经实现了一个带有服务器端过滤、排序和分页的 ui-grid.

I have implemented a ui-grid with server side filtering, sorting and pagination.

我使用 gridApi.core.on.filterChanged 与 $timeout 一起检测过滤器更改以等待用户完成输入.使用 $timeout 也不错，但我只想在 enter 键上过滤网格，但 filterChanged 事件监视字段的值并我认为它无法访问 keypress 或 keydown 事件来检测 enter 键.

I use gridApi.core.on.filterChanged to detect filter change alongside $timeout to wait for user to finish typing. It's not bad idea to use $timeout, but I want to filter grid only on enter key, but filterChanged event watches the value of field and I think it doesn't have access to keypress nor keydown events to detect enter key.

如何在 enter 键上调用 ajax 过滤器?

How can I call ajax filter on enter key?

推荐答案

找到解决方案！

正如我之前所说，我正在寻找一种CLEAN" 解决方案，以避免将 headerCellTemplate 添加到所有列并更改我的大量代码.

As I told before, I was searching for a "CLEAN" solution to avoid adding headerCellTemplate to all columns and changing lots of my code.

此解决方案以某种方式基于覆盖 ui-grid 的 cellHeaderTemplate 以使用我的自定义指令作为输入过滤器，并且效果很好.我还可以向网格添加不同类型的过滤器.

This solution is somehow based on overriding ui-grid's cellHeaderTemplate to use my custom directive as input filter, and it works great. I can also add different types of filters to my grid.

angular
    .module('ui.grid')
    .run(['$templateCache', function ($templateCache) {

        // Override uiGridHeaderCell template to replace "input" field with "grid-filter" directive
        $templateCache.put('ui-grid/uiGridHeaderCell',
            "<div ng-class=\"{ 'sortable': sortable }\"><div class=\"ui-grid-cell-contents\" col-index=\"renderIndex\"><span>{{ col.displayName CUSTOM_FILTERS }}</span><span ui-grid-visible=\"col.sort.direction\" ng-class=\"{ 'ui-grid-icon-up-dir': col.sort.direction == asc, 'ui-grid-icon-down-dir': col.sort.direction == desc, 'ui-grid-icon-blank': !col.sort.direction }\">&nbsp;</span></div><div class=\"ui-grid-column-menu-button\" ng-if=\"grid.options.enableColumnMenus && !col.isRowHeader  && col.colDef.enableColumnMenu !== false\" ng-click=\"toggleMenu($event)\" ng-class=\"{'ui-grid-column-menu-button-last-col': isLastCol}\"><i class=\"ui-grid-icon-angle-down\">&nbsp;</i></div><div ng-if=\"filterable\" class=\"ui-grid-filter-container\" ng-repeat=\"colFilter in col.filters\"><grid-filter type=\"{{colFilter.type}}\"></grid-filter><div class=\"ui-grid-filter-button\" ng-click=\"colFilter.term = null\"><i class=\"ui-grid-icon-cancel\" ng-show=\"!!colFilter.term\">&nbsp;</i><!-- use !! because angular interprets 'f' as false --></div></div></div>"
        );

        // Add custom templates to use in "grid-filter" directive
        $templateCache.put('ui-grid-filters/text',
            "<input type=\"text\" class=\"ui-grid-filter-input\" ng-model=\"colFilter.term\" ng-attr-placeholder=\"{{colFilter.placeholder || ''}}\">"
        );
        $templateCache.put('ui-grid-filters/dropdown',
            "<select class=\"ui-grid-filter-input\" ng-model=\"colFilter.term\" ng-options=\"option.text for option in colFilter.dropdownOptions \"><option value=''></option> </select>"
        );
        $templateCache.put('ui-grid-filters/date',
            "<input type='text' class=\"ui-grid-filter-input\" ng-model=\"colFilter.term\" mask=\"1399/99/99\" mask-options=\"{placeholder:' '}\" placeholder='{{colFilter.placeholder}}' />"
        );
    }])
    .directive('gridFilter', ['$templateCache', '$compile', function ($templateCache, $compile) {
        return {
            restrict: 'AE',
            replace: true,
            link: function (scope, elem, attrs) {
                var type = attrs['type'] || 'text';
                var grid = scope.$parent.$parent.grid;

                var filter = function () {
                    // Filtering comes here. We have full access to grid and it's filter terms here.
                };

                var template = $compile($templateCache.get('ui-grid-filters/' + type))(scope);
                elem.replaceWith(template);
                elem = template;

                elem.keypress(function (e) {
                    if (e.which == 13) {
                        filter();
                    }
                });

                if (type == 'dropdown') {
                    elem.change(function (e) {
                        filter();
                    })
                }

                // Handle clear button click action
                scope.$watch('$parent.colFilter.term', function (newVal, oldVal) {
                    if (newVal === null && oldVal !== null) {
                        filter();
                    }
                });
            }
        }
    }]
);

这是一个示例 gridOptions 对象.

And here is a sample gridOptions object.

$scope.gridOptions = {
    enableFiltering: true,
    enableRowSelection: true,
    enableGridMenu: true,
    paginationPageSizes: [25, 50, 75],
    paginationPageSize: 25,

    useExternalSorting: true, // Sorting is handled using gridApi.core.on.sortChanged() event
    useExternalFiltering: true, // Filtering is handled in custom directive
    useExternalPagination: true, // Pagination is handled using gridApi.pagination.on.paginationChanged() event

    columnDefs: [
        {
            field: 'username',
            displayName: "Username"
        },
        {
            field: 'status',
            displayName: 'Status',
            cellTemplate: '<div class="text-center">' +
            '<span ng-show="row.entity.status==1">Enabled</span>' +
            '<span ng-show="row.entity.status==2">Disabled</span>' +
            '</div>',
            filter: {
                type: 'dropdown',
                dropdownOptions: [
                    {
                        id: 1,
                        text: 'Enabled'
                    },
                    {
                        id: 2,
                        text: 'Disabled'
                    }
                ]
            }
        },
        {
            field: 'birthDate',
            displayName: 'Birth Date',
            filters: [
                {
                    type: 'date',
                    placeholder: 'From'
                },
                {
                    type: 'date',
                    placeholder: 'To'
                }
            ]
        },
    ]
}

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