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Thread: Best way to create a custom component

  1. #1
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    Default Answered: Best way to create a custom component

    Hello,
    I'm creating a complicate custom component. It's a timer which has a display (to show the current time), a play/pause, a remove button and a few other things inside.

    I'm actually creating the component by nesting components and adding events on initialization, but I'm not sure this is the best way to do it, and since there may be 8/10 of these complicate components, I'd like to know how to optimize it.

    Here's my current component. It's still in early stage:

    Code:
    Ext.define('My.view.Timer', {
    	extend: 'Ext.Container',
    	xtype: 'timer',
    	
    	config: {
    		baseCls: 'my-timer',
    		layout: 'vbox',
    		defaults: { xtype: 'component' },
    		items: [
    			{ // First section
    				xtype: 'container',
    				layout: 'hbox',
    				defaults: {
    					xtype: 'button',
    					baseCls: 'my-timer-button'
    				},
    				items: [
    					{
    						cls: 'my-timer-play-button',
    						iconCls: 'play',
    						itemId: 'playButton'
    					},
    					{
    						xtype: 'component',
    						baseCls: 'my-timer-display',
    						itemId: 'display',
    						flex: 1,
    						tpl: [
    							'<div class="field">',
    								'<div class="value">{hours}</div>',
    								'<div class="label">Hr</div>',
    							'</div>',
    							'<div class="field colon-field">',
    								'<div class="value">:</div>',
    								'<div class="label">&nbsp;</div>',
    							'</div>',
    							'<div class="field">',
    								'<div class="value">{minutes}</div>',
    								'<div class="label">Min</div>',
    							'</div>',
    							'<div class="field colon-field">',
    								'<div class="value">:</div>',
    								'<div class="label">&nbsp;</div>',
    							'</div>',
    							'<div class="field">',
    								'<div class="value">{seconds}</div>',
    								'<div class="label">Sec</div>',
    							'</div>',
    						]
    					},
    					{
    						cls: 'my-timer-save-button',
    						iconCls: 'save',
    						itemId: 'saveButton'
    					},
    					{
    						cls: 'my-timer-delete-button',
    						iconCls: 'delete',
    						itemId: 'deleteButton'
    					}
    				]
    			},
    			{ // Separator
    				baseCls: 'my-timer-separator'
    			},
    			{ // Description
    				baseCls: 'my-timer-description',
    				html: 'Timer description',
    				itemId: 'descriptionField'
    			}
    		
    		]
    	},
    	
    	initialize: function() {
    		this.callParent(arguments);
    		
    		// Add listeners to elements
    		this.down('#playButton').on('tap', this.playPause, this);
    		this.down('#saveButton').on('tap', this.save, this);
    		this.down('#deleteButton').on('tap', this.delete, this);
    	},
    	
    	updateData: function(data, oldData) {
    		this.callParent(arguments);
    		
    		if (data) {
    			this.down('#display').setData({
    				hours: Ext.util.Format.leftPad(data.hours, 2, '0'),
    				minutes: Ext.util.Format.leftPad(data.minutes, 2, '0'),
    				seconds: Ext.util.Format.leftPad(data.seconds, 2, '0')
    			});
    		}
    	},
    	
    	playPause: function() {
    		this.fireEvent('playPause', this);
    	}
    	
    	save: function() {
    		this.fireEvent('save', this);
    	},
    
    
    	delete: function() {
    		this.fireEvent('delete', this);
    	},
    });
    Is this the right/best way?
    Thanks

  2. What you have will work but you could also add this to the config object instead of the on methods:

    Code:
    control : {
        '#playButton' : {
            tap : 'playPause'
        },
        '#saveButton' : {
            tap : 'save'
        },
        '#deleteButton' : {
            tap : 'delete'
        }
    }

  3. #2
    Sencha - Sr Software Engineer mitchellsimoens's Avatar
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    Default

    What you have will work but you could also add this to the config object instead of the on methods:

    Code:
    control : {
        '#playButton' : {
            tap : 'playPause'
        },
        '#saveButton' : {
            tap : 'save'
        },
        '#deleteButton' : {
            tap : 'delete'
        }
    }
    Mitchell Simoens @LikelyMitch
    Sencha Inc, Senior Software Engineer
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  4. #3
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    Default

    I didn't know I could use the control config inside a view. Neat!

    Thanks!

  5. #4
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    Default

    Is there also a way to mimick the "refs" config?
    In self contained components I'm finding myself referencing to child components, and I'm actually using "this.down(...)" to find them.

    I know I could do something like:
    Code:
    initialize: {
      this.callParent(arguments);
    
      this.myButton = this.down('#myButton');
    }
    but any events controller by the "control" config would fire before the "initialize" method, thus not finding myButton.

    Thanks

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