Good day!
I am try to write method, which set(true or false) readOnly option on the elements on form, when button clicked:
Ext.override(Ext.form.Panel,{
setReadOnly: function(bReadOnly) {
this.items.each(function(f){
if (f instanceof Ext.form.FieldSet) {
f.items.each(function (f) {
if (f.isFormField) {
if (bReadOnly === true) {
f.inputEl.dom.setAttribute('readonly', true);
} else {
f.inputEl.dom.removeAttribute('readonly');
}
if (f instanceof Ext.form.TriggerField)
{
f.setDisabled(bReadOnly);
if (f instanceof Ext.form.ComboBox)
{
f.setEditable(bReadOnly);
}
}
}
});
}
});
});
On the textfield this code works perfect. But on the TriggerField i can not show trigger, when set readOnly option in false.Can Anybody help me?
You probably want the TriggerField setReadonly method
See the API reference here: http://docs.sencha.com/ext-js/3-4/#!/api/Ext.form.TriggerField-method-setReadOnly
You shoudln't need to manually alter the DOM, there are ExtJs methods available to do what you require.
Also, you can use the Panel findByType method to get all the form fields inside your panel.
http://docs.sencha.com/ext-js/3-4/#!/api/Ext.form.FormPanel-method-findByType
Related
I have a simple DelegateCommand from Telerik. I have a case,
I have a screen with a textbox and a button. Whenever I click save the button should be disabled and should not accept any clicks until the operation completes.
The implementation is as below,
public DelegateCommand SaveRemarksCommand
{
get
{
return _saveRemarksCommand = new DelegateCommand((r) =>
{
CanSaveRemarks = false;
SaveRemarksCommand.InvalidateCanExecute();
SaveRemarks(null);
},
(result) =>
{
return CanSaveRemarks;
});
}
}
Here I am manipulating the CanSaveRemarks as false until the SaveRemarks executes.
The problem now is if I click multiple times fast on the button the button accepts multiple clicks saving duplicates.
You can additionally check the CanSaveRemarks property in your command handler.
This property is already available to you, so you don't need to introduce something else.
new DelegateCommand((r) =>
{
if (!CanSaveRemarks)
{
return;
}
CanSaveRemarks = false;
try
{
SaveRemarksCommand.InvalidateCanExecute();
SaveRemarks(null);
}
finally
{
CanSaveRemarks = true;
}
},
(result) =>
{
return CanSaveRemarks;
});
I'm trying to figure out a way to have an Excel-like behavior with the Grids on Ext JS.
Here is the sample grid I am working with. So far we can already naviguate through the cells with the arrows but only in edit mode.
However what I am trying to reach is the naviguation with the arrows, TAB and Enter keys outside of the edit mode, just like excel.
I tried to integrate this piece of code which overrides the Editor class, hoping that it would change the behavior of the cells but it doesn't change a thing.
I believe this is the most important part that overrides the Editor class and tries to include the keys input :
Ext.override(Ext.Editor, {
startEdit: function (el, value) {
var me = this,
field = me.field;
me.completeEdit();
me.boundEl = Ext.get(el);
value = Ext.isDefined(value) ? value : me.boundEl.dom.innerHTML;
if (!me.rendered) {
me.render(me.parentEl || document.body);
}
if (me.fireEvent('beforestartedit', me, me.boundEl, value) !== false) {
me.startValue = value;
me.show();
field.reset();
if (deleteGridCellValue) {
field.setValue('');
me.editing = true;
me.completeEdit();
deleteGridCellValue = false; // reset global variable
}
else {
if (newGridCellValue == '') {
// default behaviour of Ext.Editor (see source if needed)
field.setValue(value);
}
else {
// custom behaviour to handle an alphanumeric key press from non-edit mode
field.setRawValue(newGridCellValue);
newGridCellValue = ''; // reset global variable
if (field instanceof Ext.form.field.ComboBox) {
// force the combo box's filtered dropdown list to be displayed (some browsers need this)
field.doQueryTask.delay(field.queryDelay);
}
}
me.realign(true);
field.focus(false, 10);
if (field.autoSize) {
field.autoSize();
}
me.editing = true;
}
}
}
});
This is the first time that I am working on a project that is outside of Comp-Sci classes so any help would be very much appreciated. Thanks !
I been trying to do checkbox Checkall and UnCheckall using subscribe and i'm partially successful doing that but i am unable to find a fix in couple of scenarios when i am dealing with subscribe .
Using subscribe :
I am here able to checkAll uncheckAll but when i uncheck a child checkbox i.e test1 or test2 i need my parent checkbox name also to be unchecked and in next turn if i check test1 the parent checkbox should be checked i.e keeping condition both child checkboxes are checked .
For fiddle : Click Here
ViewModel :
self.selectedAllBox.subscribe(function (newValue) {
if (newValue == true) {
ko.utils.arrayForEach(self.People(), function (item) {
item.sel(true);
});
} else {
ko.utils.arrayForEach(self.People(), function (item) {
item.sel(false);
});
}
});
The same scenario can be done perfectly in easy way using computed but due some performance issues i need to use subscribe which is best way it wont fire like computed onload .
Reference : Using computed same thing is done perfectly check this Fiddle
I tried to use change event in individual checkbox binding but its a dead end till now.
Any help is appreciated .
Your subscription only applies to edits on the selectedAllBox. To do what you want, you'll need subscriptions on every Person checkbox as well, to check for the right conditions and uncheck the selectedAllBox in the right situations there.
It strikes me as odd that this would be acceptable but using computed() is not. Maybe you should reconsider that part of your answer. I would much rather compute a "isAllSelected" value based on my viewModel state, then bind the selectedAllBox to that.
I solved a similar problem in my own application a couple of years ago using manual subscriptions. Although the computed observable method is concise and easy to understand, it suffers from poor performance when there's a large number of items. Hopefully the code below speaks for itself:
function unsetCount(array, propName) {
// When an item is added to the array, set up a manual subscription
function addItem(item) {
var previousValue = !!item[propName]();
item[propName]._unsetSubscription = item[propName].subscribe(function (latestValue) {
latestValue = !!latestValue;
if (latestValue !== previousValue) {
previousValue = latestValue;
unsetCount(unsetCount() + (latestValue ? -1 : 1));
}
});
return previousValue;
}
// When an item is removed from the array, dispose the subscription
function removeItem(item) {
item[propName]._unsetSubscription.dispose();
return !!item[propName]();
}
// Initialize
var tempUnsetCount = 0;
ko.utils.arrayForEach(array(), function (item) {
if (!addItem(item)) {
tempUnsetCount++;
}
});
var unsetCount = ko.observable(tempUnsetCount);
// Subscribe to array changes
array.subscribe(function (changes) {
var tempUnsetCount = unsetCount();
ko.utils.arrayForEach(changes, function (change) {
if (change.moved === undefined) {
if (change.status === 'added') {
if (!addItem(change.value))
tempUnsetCount++;
} else {
if (!removeItem(change.value))
tempUnsetCount--;
}
}
});
unsetCount(tempUnsetCount);
}, null, 'arrayChange');
return unsetCount;
}
You'll still use a computed observable in your viewmodel for the the select-all value, but now it'll only need to check the unselected count:
self.unselectedPeopleCount = unsetCount(self.People, 'Selected');
self.SelectAll = ko.pureComputed({
read: function() {
return self.People().length && self.unselectedPeopleCount() === 0;
},
write: function(value) {
ko.utils.arrayForEach(self.People(), function (person) {
person.Selected(value);
});
}
}).extend({rateLimit:0});
Example: http://jsfiddle.net/mbest/dwnv81j0/
The computed approach is the right way to do this. You can improve some performance issues by using pureComputed and by using rateLimit. Both require more recent versions of Knockout than the 2.2.1 used in your example (3.2 and 3.1, respectively).
self.SelectAll = ko.pureComputed({
read: function() {
var item = ko.utils.arrayFirst(self.People(), function(item) {
return !item.Selected();
});
return item == null;
},
write: function(value) {
ko.utils.arrayForEach(self.People(), function (person) {
person.Selected(value);
});
}
}).extend({rateLimit:1});
http://jsfiddle.net/mbest/AneL9/98/
I've Created a Model which have few custom validation. These custom validation I've annotated at property by below code
[CustomValidation(typeof(ItemmasterModel), "ValueTextMaxLenghtValidate")]
public decimal Valuetextmaxlength
{
get
{
return _Valuetextmaxlength;
}
set
{
ValidateProperty("Valuetextmaxlength",value);
_Valuetextmaxlength = value;
RaisePropertyChanged(() => Valuetextmaxlength);
}
}
public static ValidationResult ValueTextMaxLenghtValidate(object obj, ValidationContext context)
{
var itmmstr = (ItemmasterModel)context.ObjectInstance;
if (itmmstr.SelectedValuetypeDd != null)
{
string vtype = itmmstr.SelectedValuetypeDd.Key.ToString();
if (vtype.Equals("C"))
{
if (itmmstr.SelectedItemValueCodeTypesDd != null)
{
string vcode = itmmstr.SelectedItemValueCodeTypesDd.Key.ToString();
if (vcode.Equals("T"))
{
if (itmmstr.Valuetextmaxlength == null || itmmstr.Valuetextmaxlength == 0)
{
return new ValidationResult("Value Max Length is not Entered",
new List<string> { "Valuetextmaxlength" });
}
}
}
}
else if (vtype.Equals("T"))
{
if (itmmstr.Valuetextmaxlength == null || itmmstr.Valuetextmaxlength == 0)
{
return new ValidationResult("Value Max Length is not Entered",
new List<string> { "Valuetextmaxlength" });
}
}
}
return ValidationResult.Success;
}
Now this validation code depend on other property. scenerio When User select a value from dropdown it makes 1 checkbox selected automatically and User should enter the value in texbox also.
Issue:
Validation is working. checkbox is selected at first time then also it comes with error popup.
untill user doesn't make changes into this checkbox or texbox it is with error only. 1 time it says error even value has been entered .Next time it goes even user have not entered anything but during final full object validation is again comes with error.
Why this even ambiguity is happening. How to solve this.
Need more code let me know. I'll Post. Code is in Silverlight 5, MVVM Light
During my Custom validation I was using ValidateProperty("Valuetextmaxlength",value); before setting the value of property so It was giving me issue but the moment I set the value first and then Use my ValidateProperty("Valuetextmaxlength",value); everything worked smooth. Still I don't know the reason why but It worked for me.
There is form with text element that should receive focus every time form shown.
In .NET CF Form has no OnShow(n) event
I try to use workaround:
MyForm_GotFocus() // or MyForm_Activated
{
txtTextControl.Text = string.Empty;
txtTextControl.Focus()
}
txtTextControl_GotFocus()
{
txtTextControl.SelectAll()
}
Code for getting form instance:
public static MyForm GetForm
{
get
{
if (s_inst == null || s_inst.IsDisposed)
{
s_inst = new MyForm();
}
return s_inst;
}
}
public static void ShowForm()
{
var frm = GetForm;
frm.Show();
}
1) First time ShowForm (Form instance has been created): txtTextControl emptied and got focus, txtTextControl_GotFocus event raised
2) Second time ShowForm : OK too
3) Third time ShowForm : txtTextControl emptied, but does not get focus
Is there bug or feature? Is there workaround? Show I rewrite ShowForm? Is OpenNETCF.IOC.UI is better solution (50 forms in project)?
I had that same question once.
Set the TabIndex for the control to 0.