Develop Reference

Two bugs in scrollable accordion in ExtJS 6

I hit what seems to be two bugs. Here is a fiddle which demonstrates these bugs. First of all, if you click on the first panel or any other ones, you will see there appear some new panel with a missing title:
And the second bug, is that it is impossible to see the contents of the panel (one textfield, which I put to every panel). The code is as simple as:
Ext.create("Ext.window.Window", {
width: 300,
height: 400,
layout: "fit",
items:[{
xtype: "panel",
layout: {
type: "accordion"
},
scrollable: true,
listeners: {
beforerender: function () {
var i;
for (i = 0; i < 30; i += 1) {
this.add({
title: i,
items:[{
xtype: "textfield",
value: i
}]
});
}
}
}
}]
}).show();
So, the question is how to fix it all?

The outer window should not have a fit layout as this will interfere with the way the accordion layout works as it uses more or less vertical space depending on the user's actions. Also, the accordion should not have scrollable set to true as it is the parent window that should scroll.
The title you are using for the items in the accordion are seen as integer values in JS and so the 0 is not being interpreted as you would like when used in a title (which expects a string). Explicitly converting i to a string will ensure the 0 shows correctly.
In summary, the following changes will enable your code to work better:
On the outer window: remove the layout:fit and add scrollable:true.
On the accordion: remove the scrollable:true.
On the items in the accordion: ensure the title is consistently converted to a string.
See updated fiddle here.
Ext.create("Ext.window.Window", {
width: 300,
height: 400,
scrollable: true,
items: [{
xtype: "panel",
layout: {
type: "accordion"
},
listeners: {
beforerender: function () {
var i;
for (i = 0; i < 30; i += 1) {
this.add({
title: 'box ' + i,
items: [{
xtype: "textfield",
value: i
}]
});
}
}
}
}]
}).show();

ExtJS 5.1 - Implementing the Center Layout example in the Kitchen Sink?

I'm creating a web application and I want a panel to be perfectly in the center of it's parent panel. I was going through ExtJS5's Kitchen Sink to find layout examples and I found this one.
It places the panel perfectly in the middle, it doesn't cheat using hbox or vbox then setting the pack and align properties to center and middle.
Here is the code he used:
Ext.define('KitchenSink.view.layout.Center', {
extend: 'Ext.container.Container',
requires: [
'Ext.layout.container.Center'
],
xtype: 'layout-center',
width: 500,
height: 400,
layout: 'center',
items: {
title: 'Centered Panel: 75% of container width and 95% height',
border: true,
layout: 'center',
scrollable: true,
width: '75%',
height: '95%',
bodyPadding: '20 0',
items: [
{
title: 'Inner Centered Panel',
html: 'Fixed 300px wide and full height. The container panel will also autoscroll if narrower than 300px.',
width: 300,
height: '100%',
frame: true,
bodyPadding: '10 20'
}
]
}
});
And here is how it looks like:
The reason I prefer this is because the width and height of one the first inner panel is purely percent based. If I tried this using hbox or vbox, I would need to set the width or height to a fixed number.
I'm using Sencha Architect and for some reason, I can't find the layout type center for my panel, container, and viewport elements. I've also included the Ext.layout.container.Center in my requires but still no dice.
Does anyone know how to implement this Kitchen Sink example in Sencha Architect?

This is a bug https://www.sencha.com/forum/showthread.php?293050
But you can easily overcome any such problems using process config function in SA.
Select your class where you want to edit special configs and click on add processCofnig
Next in the generated function you can edit the configs in any way you need.
processMyContainer: function(config) {
config.layout = "center";
}
The only disadvantage of using process config is that you will not see the settings set by it in the SA design view - but when you preview the app you will see it.
This is my final code for the class:
Ext.define('MyApp.view.MyContainer', {
extend: 'Ext.container.Container',
alias: 'widget.mycontainer',
requires: [
'MyApp.view.MyContainerViewModel',
'Ext.panel.Panel'
],
viewModel: {
type: 'mycontainer'
},
height: 800,
width: 600,
initConfig: function(instanceConfig) {
var me = this,
config = {
items: [
me.processMainPAnel({
xtype: 'panel',
height: '95%',
width: '75%',
bodyPadding: '20 0',
title: 'Centered Panel: 75% of container width and 95% height',
items: [
{
xtype: 'panel',
height: '100%',
html: 'Fixed 300px wide and full height. The container panel will also autoscroll if narrower than 300px.',
width: 300,
bodyPadding: '10 20',
title: 'Inner Centered Panel'
}
]
})
]
};
me.processMyContainer(config);
if (instanceConfig) {
me.getConfigurator().merge(me, config, instanceConfig);
}
return me.callParent([config]);
},
processMainPAnel: function(config) {
config.layout = "center";
return config;
},
processMyContainer: function(config) {
config.layout = "center";
}
});
This is the result in the browser:

How do I make multiple components within a Container inherit the Container's computed width?

Here is a Sencha fiddle of my tab panel setup. Buttons are dynamically added to a vbox tabs container that is part of an hbox layout setup. The tabs container's width is determined by the flex property.
I've tried setting every button's width: '100%', but upon looking at the Sencha docs on button.width, I find that width takes an integer value representing pixels. I've tried setting the width in style, but I've only succeeded in making the button's width be the width of the screen.
Help and an explanation of the underlying CSS concepts would be greatly appreciated

You're looking for the stretchmax option.
var locationCameraList=[];
Ext.application({
name : 'Fiddle',
launch : function() {
var buttonArr = [];
for (i = 0; i < locationCameraList.length; ++i) {
var tabName = locationCameraList[i].location,
index = i;
var tab = {
xtype: 'button',
cls: 'tab'+index,
text: tabName,
scale: 'medium'
};
buttonArr.push(tab);
console.log(i)
}
var forms = {
xtype: 'container',
flex: 4,
layout: 'fit',
align: 'stretch',
html: 'zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz'
};
Ext.create('Ext.window.Window', {
title: 'Foo',
layout: 'hbox',
items:[{
xtype: 'container',
items: buttonArr,
flex: 1,
layout: {
type: 'vbox',
align: 'stretchmax'
},
autoScroll: true,
height: 200
}, forms]
}).show();
}
});

Changing the height or adding padding to an EXTjs ext.tab.Tab component

I've got a a Tab panel with a few tabs inside. I'm using the iconCls property in the tabs to give each tab an image along with its title. I'm using the fam fam fam 16x16 icons and the default tab space is cutting the images off at the top/bottom.
I tried messing around with the icon's class by changing the margins but it's not helping. According to the documentation the ext.tab.Tab component has padding and height properties, but setting those is not having an effect on the tab at runtime.
Ext.define('AM.view.Tab.Standard', {
extend: 'Ext.tab.Panel',
alias: 'widget.TabStandard',
region: 'center', // a center region is ALWAYS required for border layout
deferredRender: false,
activeTab: 0, // first tab initially active
initComponent: function() {
this.items = this.buildItems();
this.callParent(arguments);
},
buildItems: function(){
var items =
[
{
padding: 10, // nope :(
title: 'Gantt',
autoScroll: true,
iconCls: 'gantt icon',
},
{
height: 10, // nope :(
title: 'Logs',
autoScroll: true,
iconCls: 'logs icon',
},
{
title: 'Help',
autoScroll: true,
iconCls: 'help icon',
}
];
return items
},
});
Perhaps I'm misunderstanding how those properties work, but the everything on the page looks the same.
EDIT: It appears I'm having the same problem with the "Headings" (the bar with the +/-) when used as an accordion panel.

You can customize tabs in a tab panel by using the tabBar property on tabPanel:
var tabpanel = new Ext.tab.Panel({
plain: true,
region: 'center',
tabBar: {
defaults: {
flex: 1, // if you want them to stretch all the way
height: 20, // set the height
padding: 6 // set the padding
},
dock: 'top'
}
});

How to put two Ext.Panels to the left and right of each other in another Ext.Panel?

I'm trying to create a layout in ExtJS which has a grid on top and on the bottom left and right sections, a basic parent/child, master/details layout:
wrapper_panel
panel_top
[grid]
panel_bottom
[left_area right_area]
However, the two areas in panel_bottom are on top of each other instead of to the left and right
var left_area = new Ext.Panel({
region: 'west',
layout: 'fit',
width: 100,
items: []
});
var right_area = new Ext.Panel({
region: 'center',
layout: 'fit',
width: 100,
items: []
});
var panel_bottom = new Ext.Panel({
//layout: 'border',
region: 'south',
items: [ left_area, right_area ]
})
It looks like this:
If I make the panel_bottom layout: border then the left and right areas disappear completely.
What do I need to change in the bottom area panels so that they line up left and right?
Addendum
#vimvds, if I add width: 200 or e.g. width: 300, I just get this:
Thanks for the answers, it led me to scrap this and use the table layout instead, which led me to another question how to define percentage instead of absolute values for height/width.

I'd use a Ext.layout.HBoxLayout:
var panel_bottom = new Ext.Panel({
layout: {
type: 'hbox',
align: 'stretch'
},
defaults: {
flex: 1
},
items: [ left_area, right_area ],
});
Alternatively you could also use a Ext.layout.TableLayout or a Ext.layout.ColumnLayout:
var panel_bottom = new Ext.Panel({
layout: 'column',
defaults: {
columnWidth: 0.5
},
items: [ left_area, right_area ],
});

And what happens if you use :
var panel_bottom = new Ext.Panel({
layout: 'border',
items: [ left_area, right_area ],
width: 200
});