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Thread: NavigationView fails to listen to child views' bound titles

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  1. #1
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    Default NavigationView fails to listen to child views' bound titles

    Minimal Working Example
    Code:
    Ext.define('ExtJSBUG.NavigationView.MWE', {
    	extend: 'Ext.Container',
    	xtype: 'mwe',
    
    
    	config: {
    		layout: 'vbox',
    		items: [{
    			xtype: 'navigationview',
    			reference: 'nav',
    			flex: 1,
    			items: [{
    				xtype: 'mwepanel',
    				layout: 'vbox',
    				items: [{
    					xtype: 'button',
    					text: 'Push a new view!',
    					handler: () => {
    						this.lookupReference('nav').push({
    							title: 'Second',
    							html: 'Second view!',
    						});
    					},
    				}],
    			}],
    		}],
    	},
    });
    
    
    
    
    Ext.define('ExtJSBUG.NavigationView.MWEPanel', {
    	extend: 'Ext.Panel',
    	xtype: 'mwepanel',
    
    
    	viewModel: 'mwepanel',
    
    
    	bind: {
    		title: '{boundTitle}',
    	},
    });
    
    
    
    
    Ext.define('ExtJSBUG.NavigationView.MWEPanelViewModel', {
    	extend: 'Ext.app.ViewModel',
    	alias: 'viewmodel.mwepanel',
    
    
    	data: {
    		boundTitle: 'Edit Stuff',
    	},
    });
    Problem Description

    If I use a NavigationView with panels that have their title bound, the navigation view will fail to pick them up.

    If, as a workaround, I also define an empty title in the config, then only the config's original title will be taken into account, rather than the one updated by the binding.

    The problem is NavigationView ignores bindings. It also ignores titles put in eventedConfig and does not seek to listen to updates on the title.

    For me the core problem is that no data binding is in place between child view title and NavigationView. However if that somehow was impossible then at least titles put in eventedConfig should be supported. The doc should also be clearer about current limitations / about how the child view's title is read.

  2. #2
    Ext Team Member
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    Sep 2017
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    Default

    Thank you for sharing this with us. I have passed this along to the support team and asked them to look into this at their earliest convenience.

    Thanks,

    Michele

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