Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
727 views
in Technique[技术] by (71.8m points)

angularjs - How to swipe from left to right Ionic list item?

I want to swipe Ionic list items to both sides. (i.e left-right AND right-left). It works perfectly for right-left swipe but I am not able to swipe list item to left side.

I used $ionicGesture for left-right swipe, and it also gives me an alert when i use swiperight event: event($ionicGesture.on('swiperight', scope.reportEvent, elem)), but I am not able to let it show the ion-option-button at the left side.

Here is my directive and controller code:

.directive('onSwipeRight', function($ionicGesture) {
  return {
    restrict :  'A',
    link : function(scope, elem, attrs) {
      var gestureType = attrs.gestureType;
      switch(gestureType) {
        case 'swipeRight':
          $ionicGesture.on('swiperight', scope.reportEvent, elem);
          break;
        case 'swipeleft':
          $ionicGesture.on('swipeleft', scope.reportEvent, elem);
          break;
        case 'doubletap':
          $ionicGesture.on('doubletap', scope.reportEvent, elem);
          break;
        case 'tap':
          $ionicGesture.on('tap', scope.reportEvent, elem);
          break;
      }

    }
  }
})

.controller('ChatsCtrl', function($scope, Chats) {
  // With the new view caching in Ionic, Controllers are only called
  // when they are recreated or on app start, instead of every page change.
  // To listen for when this page is active (for example, to refresh data),
  // listen for the $ionicView.enter event:
  //
  //$scope.$on('$ionicView.enter', function(e) {
  //});

  $scope.chats = Chats.all();
  $scope.remove = function(chat) {
    Chats.remove(chat);
  }

  $scope.reportEvent = function (event) {
    alert("hi");
    console.log('Reporting : ' + event.type);
    event.preventDefault();
};

})

Here is my html code.

<ion-view view-title="Chats">
    <ion-content>
        <ion-list can-swipe="true">
            <ion-item gesture-type="swipeRight" on-swipe-right="swipeRight()" class="item-remove-animate item-avatar item-icon-right" ng-repeat="chat in chats" type="item-text-wrap" href="#/tab/chats/{{chat.id}}">

                <img ng-src="{{chat.face}}">
                <h2>{{chat.name}}</h2>
                <p>{{chat.lastText}}</p>
                <i class="icon ion-chevron-right icon-accessory"></i>
                <ion-option-button class="button-assertive" ng-click="share(item)" side="left">
                    Share
                </ion-option-button>
                <ion-option-button class="button-assertive" ng-click="remove(chat)" side="right">
                    Delete
                </ion-option-button>
            </ion-item>
        </ion-list>
    </ion-content>
</ion-view>

So I want to display share button at left side and delete button at right side.

Can anybody provide me specific solution for it?

See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Answer

0 votes
by (71.8m points)

I've edited ionic lib to do something like that. But i couldn't do a JSFiddle or a Code Pen i Will give you the link to my modified ionic.css and ionic.bundle.js!

TL;DR

https://gist.githubusercontent.com/booris/847f044d2ef2a05101ce/raw/2274365384f5eed3e4538b269f3a7d7998eb22ed/ionic.css

https://gist.githubusercontent.com/booris/847f044d2ef2a05101ce/raw/2274365384f5eed3e4538b269f3a7d7998eb22ed/ionic.bundle.js

Just replace it with yours, start an ionic project blank. And put this HTML in it:

 <body ng-app="starter">
       <ion-pane>
            <ion-header-bar class="bar-stable">
                <h1 class="title">Ionic Blank Starter</h1>
            </ion-header-bar>
            <ion-content>
                <ion-list show-delete="false" can-swipe="true" swipe-direction="both">
                    <ion-item href="#">
                        Item 1
                        <ion-option-button side="right" class="button-light icon ion-heart"></ion-option-button>
                        <ion-option-button side="right" class="button-light icon ion-email"></ion-option-button>
                        <ion-option-button side="left" class="button-assertive icon ion-trash-a"></ion-option-button>
                    </ion-item>
                    <ion-item href="#">
                        Item 2
                        <ion-option-button class="button-light icon ion-heart"></ion-option-button>
                        <ion-option-button class="button-light icon ion-email"></ion-option-button>
                        <ion-option-button class="button-assertive icon ion-trash-a"></ion-option-button>
                    </ion-item>
                </ion-list>
            </ion-content>
        </ion-pane>
  </body>

You can specify the wipe direction with left, right or both. And in the ion-options-button you can give it a side.

Hope it helps, anything you need just ask! I will try to comment my changes in the code later on!

EDIT: I will try to explain what i did.

First change the ionOptionButton directive to create to div for the button, one left and one right

 //added second div with class item-options-left for the left buttons

var ITEM_TPL_OPTION_BUTTONS =
        '<div class="item-options invisible">' +
        '</div>' + '<div class="item-options-left invisible">' + 
        '</div>';
IonicModule.directive('ionOptionButton', [function () {
    function stopPropagation(e) {
        e.stopPropagation();
    }
    return {
        restrict: 'E',
        require: '^ionItem',
        priority: Number.MAX_VALUE,
        compile: function ($element, $attr) {
            $attr.$set('class', ($attr['class'] || '') + ' button', true);
            return function ($scope, $element, $attr, itemCtrl) {

                if (!itemCtrl.optionsContainer) {
                    itemCtrl.optionsContainer = jqLite(ITEM_TPL_OPTION_BUTTONS);
                    itemCtrl.$element.append(itemCtrl.optionsContainer);
                }

                //[NEW] if it as an attribute side = 'left' put the button in the left container
                if ($attr.side === 'left') {
                    angular.element(itemCtrl.optionsContainer[1]).append($element);
                    itemCtrl.$element.addClass('item-left-editable');
                } else{
                    angular.element(itemCtrl.optionsContainer[0]).append($element);
                    itemCtrl.$element.addClass('item-right-editable');
                }

                //Don't bubble click up to main .item
                $element.on('click', stopPropagation);
            };
        }
    };
}]);

Add CSS to left buttons in ionic.css file

.item-options-left {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 1;
  height: 100%; }
.item-options-left .button {
  height: 100%;
  border: none;
  border-radius: 0;
  display: -webkit-inline-box;
  display: -webkit-inline-flex;
  display: -moz-inline-flex;
  display: -ms-inline-flexbox;
  display: inline-flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  -webkit-align-items: center;
  -moz-align-items: center;
  align-items: center; }
.item-options .button:before {
  margin: 0 auto; }

Now change the ion-list controller to accept swipe directions attribute

.controller('$ionicList', [
  '$scope',
  '$attrs',
  '$ionicListDelegate',
  '$ionicHistory',
function ($scope, $attrs, $ionicListDelegate, $ionicHistory) {
            var self = this;

            //[NEW] object with can-swipe attr and swipe-direction side attr, default direction is left
            var swipe = {
                isSwipeable: true,
                side: 'left'
            };
            var isReorderShown = false;
            var isDeleteShown = false;

            var deregisterInstance = $ionicListDelegate._registerInstance(
                self, $attrs.delegateHandle,
                function () {
                    return $ionicHistory.isActiveScope($scope);
                }
            );
            $scope.$on('$destroy', deregisterInstance);

            self.showReorder = function (show) {
                if (arguments.length) {
                    isReorderShown = !!show;
                }
                return isReorderShown;
            };

            self.showDelete = function (show) {
                if (arguments.length) {
                    isDeleteShown = !!show;
                }
                return isDeleteShown;
            };

            //[NEW] get swipe direction attribute and store it in a variable to access in other function
            self.canSwipeItems = function (can) {
                if (arguments.length) {
                    swipe.isSwipeable = !!can;
                    swipe.side = $attrs.swipeDirection;
                }
                return swipe;
            };

            self.closeOptionButtons = function () {
                self.listView && self.listView.clearDragEffects();
            };
}]);

To end, you should replace slideDrag function with this one, just search for it in ionic.bundle.js

//[NEW] add this var to the others in the function
var ITEM_OPTIONS_CLASS_RIGHT = 'item-options-left';

var SlideDrag = function (opts) {
        this.dragThresholdX = opts.dragThresholdX || 10;
        this.el = opts.el;
        this.item = opts.item;
        this.canSwipe = opts.canSwipe;
    };

    SlideDrag.prototype = new DragOp();

    SlideDrag.prototype.start = function (e) {
        var content, buttonsLeft, buttonsRight, offsetX, buttonsLeftWidth, buttonsRightWidth;

        if (!this.canSwipe().isSwipeable) {
            return;
        }

        if (e.target.classList.contains(ITEM_CONTENT_CLASS)) {
            content = e.target;
        } else if (e.target.classList.contains(ITEM_CLASS)) {
            content = e.target.querySelector('.' + ITEM_CONTENT_CLASS);
        } else {
            content = ionic.DomUtil.getParentWithClass(e.target, ITEM_CONTENT_CLASS);
        }

        // If we don't have a content area as one of our children (or ourselves), skip
        if (!content) {
            return;
        }

        // Make sure we aren't animating as we slide
        content.classList.remove(ITEM_SLIDING_CLASS);

        // Grab the starting X point for the item (for example, so we can tell whether it is open or closed to start)
        offsetX = parseFloat(content.style[ionic.CSS.TRANSFORM].replace('translate3d(', '').split(',')[0]) || 0;

        // Grab the buttons
        buttonsLeft = content.parentNode.querySelector('.' + ITEM_OPTIONS_CLASS);
        if (!buttonsLeft) {
            return;
        }

        //[NEW] get the Right buttons
        buttonsRight = content.parentNode.querySelector('.' + ITEM_OPTIONS_CLASS_RIGHT);
        if (!buttonsRight) {
            return;
        }

        // [NEW] added the same functionality to both sides, to make buttons visible when dragged
        if(e.gesture.direction === "left")
            buttonsLeft.classList.remove('invisible');
        else
            buttonsRight.classList.remove('invisible');

        //[NEW] added buttonRight and buttonLeft properties to currentDrag

        buttonsLeftWidth = buttonsLeft.offsetWidth;
        buttonsRightWidth = buttonsRight.offsetWidth;

        this._currentDrag = {
            buttonsLeft: buttonsLeft,
            buttonsRight: buttonsRight,
            buttonsLeftWidth: buttonsLeftWidth,
            buttonsRightWidth: buttonsRightWidth,
            content: content,
            startOffsetX: offsetX
        };
    };

    /**
     * Check if this is the same item that was previously dragged.
     */
    SlideDrag.prototype.isSameItem = function (op) {
        if (op._lastDrag && this._currentDrag) {
            return this._currentDrag.content == op._lastDrag.content;
        }
        return false;
    };

    SlideDrag.prototype.clean = function (isInstant) {
        var lastDrag = this._lastDrag;

        if (!lastDrag || !lastDrag.content) return;

        lastDrag.content.style[ionic.CSS.TRANSITION] = '';
        lastDrag.content.style[ionic.CSS.TRANSFORM] = '';
        if (isInstant) {
            lastDrag.content.style[ionic.CSS.TRANSITION] = 'none';
            makeInvisible();
            ionic.requestAnimationFrame(function () {
                lastDrag.content.style[ionic.CSS.TRANSITION] = '';
            });
        } else {
            ionic.requestAnimationFrame(function () {
                setTimeout(makeInvisible, 250);
            });
        }

        function makeInvisible() {
            lastDrag.buttonsLeft && lastDrag.buttonsLeft.classList.add('invisible');
            lastDrag.buttonsRight && lastDrag.buttonsRight.classList.add('invisible');
        }
    };

    SlideDrag.prototype.drag = ionic.animationFrameThrottle(function (e) {
        var buttonsLeftWidth;
        var buttonsRightWidth;

        // We really aren't dragging
        if (!this._currentDrag) {
            return;
        }

        // Check if we should start dragging. Check if we've dragged past the threshold,
        // or we are starting from the open state.
        if (!this._isDragging &&
            ((Math.abs(e.gesture.deltaX) > this.dragThresholdX) ||
                (Math.abs(this._currentDrag.startOffsetX) > 0))) {
            this._isDragging = true;
        }

        if (this._isDragging) {
            buttonsLeftWidth = this._currentDrag.buttonsLeftWidth;
            buttonsRightWidth = this._currentDrag.buttonsRightWidth;

            // Grab the new X point, capping it at zero
            //[NEW] added right swipe new position
            if (this.canSwipe().side === 'left' || (this.canSwipe().side === 'both' && e.gesture.direction === 'left'))
                var newX = Math.min(0, this._currentDrag.startOffsetX + e.gesture.deltaX);
            else if (this.canSwipe().side === 'right' || (this.canSwipe().side === 'both' && e.gesture.direction === 'right'))
                var newX = M

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...