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Multi-View Hover Monitor
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| describe('Given an array of view instances', function(){ | |
| var views = Ember.A([ | |
| Ember.View.create(), | |
| Ember.View.create() ]); | |
| var monitor = HauteLook.MultiViewHoverMonitor.create({ views: views }); | |
| it( 'should start with isHovering==false', function(){ | |
| expect( monitor.get('isHovering') ).to.equal( false ); | |
| }); | |
| it( 'should change isHovering when a view is hovered', function( done ){ | |
| var aView = views.objectAt( 0 ); | |
| Ember.run(function(){ | |
| aView.trigger('mouseEnter'); | |
| }); | |
| expect( monitor.get('isHovering') ).to.equal( true ); | |
| Ember.run(function(){ | |
| aView.trigger('mouseLeave'); | |
| }); | |
| expect( monitor.get('isHovering') ).to.equal( true ); | |
| Ember.run.later(function(){ | |
| expect( monitor.get('isHovering') ).to.equal( false ); | |
| done(); | |
| }, monitor.get('toleranceInMilliseconds')); | |
| }); | |
| it( 'should debounce hover messages between views', function(done){ | |
| var aView = views.objectAt( 0 ); | |
| Ember.run(function(){ | |
| aView.trigger('mouseEnter'); | |
| }); | |
| expect( monitor.get('isHovering') ).to.equal( true ); | |
| Ember.run(function(){ | |
| aView.trigger('mouseLeave'); | |
| }); | |
| expect( monitor.get('isHovering') ).to.equal( true ); | |
| var anotherView = views.objectAt( 1 ); | |
| Ember.run(function(){ | |
| anotherView.trigger('mouseEnter'); | |
| }); | |
| expect( monitor.get('isHovering') ).to.equal( true ); | |
| Ember.run(function(){ | |
| anotherView.trigger('mouseLeave'); | |
| }); | |
| expect( monitor.get('isHovering') ).to.equal( true ); | |
| Ember.run.later(function(){ | |
| expect( monitor.get('isHovering') ).to.equal( false ); | |
| done(); | |
| }, monitor.get('toleranceInMilliseconds')); | |
| }); | |
| }); |
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| HauteLook.MultiViewHoverMonitor = Ember.Object.extend({ | |
| toleranceInMilliseconds : 500, | |
| init : function(){ | |
| this._super(); | |
| this.set( 'isHovering', false ); | |
| this.onViewsChanged(); | |
| }, | |
| onViewsChanging : function(){ | |
| var views = this.get( 'views' ); | |
| if( views ){ | |
| views.forEach(function( view ){ | |
| view.off( 'mouseEnter', this, 'mouseEnteredAnyView' ); | |
| view.off( 'mouseLeave', this, 'mouseLeftAnyView' ); | |
| }.bind( this )); | |
| } | |
| }.observesBefore( 'views' ), | |
| onViewsChanged : function(){ | |
| var views = this.get( 'views' ); | |
| if( views ){ | |
| views.forEach(function( view ){ | |
| view.on( 'mouseEnter', this, 'mouseEnteredAnyView' ); | |
| view.on( 'mouseLeave', this, 'mouseLeftAnyView' ); | |
| }.bind( this )); | |
| } | |
| }.observes( 'views' ), | |
| mouseEnteredAnyView : function(){ | |
| var isHovering = this.get( 'isHovering' ); | |
| if( ! isHovering ){ | |
| this.set( 'isHovering', true ); | |
| } | |
| if( this._timer ){ | |
| Ember.run.cancel( this._timer ); | |
| this._timer = null; | |
| } | |
| }, | |
| mouseLeftAnyView : function(){ | |
| var t = this.get( 'toleranceInMilliseconds' ); | |
| Ember.run.later( this, 'onTimerExpired', t ); | |
| }, | |
| onTimerExpired : function(){ | |
| this._timer = null; | |
| this.set( 'isHovering', false ); | |
| } | |
| }); |
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