ExtJS4.2: supported shortcut keys (not as simple as you think)

A page has two panels and each has a [add (F2)] button. How do I support shortcut keys? The figure indicates that the first implementation should be very simple. ExtJs provides Ext. util. KeyMap, which is easy to support shortcut keys. Code example 1 // & lt; referencepath & quot; Ext/ext-all-debu... Synta

A page has two panels and each has a [add (F2)] button. How do I support shortcut keys? Image Diagram

The first implementation should feel very simple. ExtJs provides "Ext. util. KeyMap", which is easy to support shortcut keys. Sample Code
1 ///
2
3 Ext. onReady (function (){
4
5 var viewport = Ext. create ('ext. container. viewport ',{
6 layout :{
7 type: 'vbox ',
8 align: 'stretch'
9 },
10 padding: 10,
11 items :[{
12 xtype: 'panel ',
13 id: 'panela ',
14 title: 'test the keypa ',
15 tbar :[{
16 text: 'add (F2 )'
17}],
18 frame: true,
19 flex: 1,
20 html: 'Hello, the table or form shown here. '
21 },{
22 xtype: 'panel ',
23 id: 'panelb ',
24 title: 'test B 'with a shortcut key ',
25 tbar :[{
26 text: 'add (F2 )'
27}],
28 frame: true,
29 flex: 1,
30 html: 'Hello, the table or form shown here. '
31}]
32 });
33
34 Ext. create ('ext. util. keymap ',{
35 target: 'panela ',
36 key: Ext. EventObject. F2,
37 fn: function (key, ev ){
38 alert ('add ');
39
40 ev. stopEvent ();
41
42 return false;
43}
44 });
45
46 Ext. create ('ext. util. keymap ',{
47 target: 'panelb ',
48 key: Ext. EventObject. F2,
49 fn: function (key, ev ){
50 alert ('add B ');
51
52 ev. stopEvent ();
53
54 return false;
55}
56 });
57}); the actual result is that pressing F2 directly after opening the browser has no effect. Clicking A or B with the mouse and then pressing F2 has no effect.

The second implementation is that the div element must add the tabindex = 0 attribute. Sample Code
1 ///
2
3 Ext. onReady (function (){
4
5 var viewport = Ext. create ('ext. container. viewport ',{
6 layout :{
7 type: 'vbox ',
8 align: 'stretch'
9 },
10 padding: 10,
11 items :[{
12 xtype: 'panel ',
13 id: 'panela ',
14 title: 'test the keypa ',
15 tbar :[{
16 text: 'add (F2 )'
17}],
18 frame: true,
19 flex: 1,
20 html: 'Hello, the table or form shown here. ',
21 autoEl :{
22 tag: 'div ',
23 tabindex: 0
24}
25 },{
26 xtype: 'panel ',
27 id: 'panelb ',
28 title: 'test B with a shortcut key ',
29 tbar :[{
30 text: 'add (F2 )'
31}],
32 frame: true,
33 flex: 1,
34 html: 'Hello, the table or form shown here. ',
35 autoEl :{
36 tag: 'div ',
37 tabindex: 0
38}
39}]
40 });
41
42 Ext. create ('ext. util. keymap ',{
43 target: 'panela ',
44 key: Ext. EventObject. F2,
45 fn: function (key, ev ){
46 alert ('add ');
47
48 ev. stopEvent ();
49
50 return false;
51}
52 });
53
54 Ext. create ('ext. util. keymap ',{
55 target: 'panelb ',
56 key: Ext. EventObject. F2,
57 fn: function (key, ev ){
58 alert ('add B ');
59
60 ev. stopEvent ();
61
62 return false;
63}
64 });
65}); it is ineffective to press F2 directly after opening the browser. After opening the browser, click A or B and then press F2.

The third implementation solves the problem of recognizing the shortcut key without clicking div after opening the browser. You need to manually call the foucs () method. Sample Code
1 ///
2
3 Ext. onReady (function (){
4
5 var viewport = Ext. create ('ext. container. viewport ',{
6 layout :{
7 type: 'vbox ',
8 align: 'stretch'
9 },
10 padding: 10,
11 items :[{
12 xtype: 'panel ',
13 id: 'panela ',
14 title: 'test the keypa ',
15 tbar :[{
16 text: 'add (F2 )'
17}],
18 frame: true,
19 flex: 1,
20 html: 'Hello, the table or form shown here. ',
21 autoEl :{
22 tag: 'div ',
23 tabindex: 0
24}
25 },{
26 xtype: 'panel ',
27 id: 'panelb ',
28 title: 'test B with a shortcut key ',
29 tbar :[{
30 text: 'add (F2 )'
31}],
32 frame: true,
33 flex: 1,
34 html: 'Hello, the table or form shown here. ',
35 autoEl :{
36 tag: 'div ',
37 tabindex: 0
38}
39}]
40 });
41
42 Ext. create ('ext. util. keymap ',{
43 target: 'panela ',
44 key: Ext. EventObject. F2,
45 fn: function (key, ev ){
46 alert ('add ');
47
48 ev. stopEvent ();
49
50 return false;
51}
52 });
53
54 Ext. create ('ext. util. keymap ',{
55 target: 'panelb ',
56 key: Ext. EventObject. F2,
57 fn: function (key, ev ){
58 alert ('add B ');
59
60 ev. stopEvent ();
61
62 return false;
63}
64 });
65
66 Ext. get ('panelb'). focus ();
67 });