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10 answers
1.1K+ views

Grid scrolling works extremely slow in case of using it with virtualization and sorting. 

Link to reproduce an issue: https://dojo.telerik.com/@WA_PMak/IzevIzaV

Steps to reproduce:

  1. Follow the link  https://dojo.telerik.com/@WA_PMak/IzevIzaV
  2. Push the Run button
  3. Sort by any column (for example by First Name)
  4. Scroll grid till it loaded next virtual page


    Actual result: grid freezes during scrolling.
    Expected result: grid scrolling work fast as it do if it has unsorted data.
Stefan
Telerik team
 answered on 21 Mar 2018
2 answers
256 views

Hi

In day view, I got group resource. It working fine.

But I want to turn off group resource in Month view.

I didn't find this kind of API in the schedule.

Does someone know how to do that?

 

Ivan Danchev
Telerik team
 answered on 21 Mar 2018
1 answer
134 views
Is it possible to use the value of recurrenceRule FREQ=DAILY with BYDAY, e.g. "FREQ=DAILY;COUNT=4;INTERVAL=3;BYDAY=MO,TU,WE,TH,FR"?
I reproduced the situation when have an incorrect result http://dojo.telerik.com/oqiJAKoR and received dates «16, 19, 22, 28» instead of «16, 21, 26, 29».
Veselin Tsvetanov
Telerik team
 answered on 20 Mar 2018
4 answers
403 views

Hi,

Within re-implementing app to Kendo we're using kendo grid where all used grids unfortunately have an invalid paging footer. Buttons around page numbers (like Go to the next page, etc.) are disabled and next to it are rendered again as properly working.

Do you have any ideas or similar cases why it is happening?

Thanks much,
Martin

Ludvik
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 answered on 20 Mar 2018
2 answers
323 views

We found that following features are totally undocumented , where <text> is a custom string :

  1. options.fields.fieldName.validation.<attribute> = value; is generally passed-through like ad HTML attribute when kendo.ui.Editable is involved for editing corresponding model field <fieldName>
  2. And so on options.fields.fieldName.validation.validationMessage  = "My custom message"; is generally passed-through like ad HTML attribute onto the corresponding INPUT dom element and it is very usefull when you need a custom validation message avoiding to deal with direct DOM manipulation
  3. No document in your online KB mentions this behaviour associated to the Model.define() instead a KB page could be find related to the Validator https://docs.telerik.com/kendo-ui/controls/editors/validator/overview#application-of-custom-message-attributes , I think could save time to developers know that it is possibile and should be documented

Proofs in your code :

The CreateAttributes assembles object which contains the name:value pair from model field validation :

function createAttributes(options) {
    var field = (options.model.fields || options.model)[options.field], type = fieldType(field), validation = field ? field.validation : {}, ruleName, DATATYPE = kendo.attr('type'), BINDING = kendo.attr('bind'), rule, attr = {
        name: options.field,
        title: options.title
    };
    for (ruleName in validation) {
         // ruleName can contains a custom string that is not a validation rule
 
         // and rule will contain its value, for example validationMessage='MyMessage ....'
 
        rule = validation[ruleName];
        if (inArray(ruleName, specialRules) >= 0) {
            attr[DATATYPE] = ruleName;
        } else if (!isFunction(rule)) {
            attr[ruleName] = isPlainObject(rule) ? rule.value || ruleName : rule;
        }
        attr[kendo.attr(ruleName + '-msg')] = rule.message;
    }
    if (inArray(type, specialRules) >= 0) {
        attr[DATATYPE] = type;
    }
    attr[BINDING] = (type === 'boolean' ? 'checked:' : 'value:') + options.field;
    return attr;
}

 

The editor choosed by the kendo.ui.Editable sets DOM attributes via attr() and the previously assembled object

var editors = {
    'number': function (container, options) {
        var attr = createAttributes(options);
        $('<input type="text"/>').attr(attr).appendTo(container).kendoNumericTextBox({ format: options.format });
        $('<span ' + kendo.attr('for') + '="' + options.field + '" class="k-invalid-msg"/>').hide().appendTo(container);
    },
    'date': function (container, options) {
        var attr = createAttributes(options), format = options.format;
        if (format) {
            format = kendo._extractFormat(format);
        }
        attr[kendo.attr('format')] = format;
        $('<input type="text"/>').attr(attr).appendTo(container).kendoDatePicker({ format: options.format });
        $('<span ' + kendo.attr('for') + '="' + options.field + '" class="k-invalid-msg"/>').hide().appendTo(container);
    },
    'string': function (container, options) {
        var attr = createAttributes(options);
        $('<input type="text" class="k-input k-textbox"/>').attr(attr).appendTo(container);
    },
    'boolean': function (container, options) {
        var attr = createAttributes(options);
        $('<input type="checkbox" />').attr(attr).appendTo(container);
    },
    'values': function (container, options) {
        var attr = createAttributes(options);
        var items = kendo.stringify(convertItems(options.values));
        $('<select ' + kendo.attr('text-field') + '="text"' + kendo.attr('value-field') + '="value"' + kendo.attr('source') + '=\'' + (items ? items.replace(/\'/g, ''') : items) + '\'' + kendo.attr('role') + '="dropdownlist"/>').attr(attr).appendTo(container);
        $('<span ' + kendo.attr('for') + '="' + options.field + '" class="k-invalid-msg"/>').hide().appendTo(container);
    }
};

 

The validator  looks the ruleKey validationMessage directly on DOM element of a INPUT tag

var Validator = Widget.extend({   
    // ...
    _extractMessage: function (input, ruleKey) {
        var that = this, customMessage = that.options.messages[ruleKey], fieldName = input.attr(NAME), nonDefaultMessage;
        if (!kendo.ui.Validator.prototype.options.messages[ruleKey]) {
            nonDefaultMessage = kendo.isFunction(customMessage) ? customMessage(input) : customMessage;
        }
        customMessage = kendo.isFunction(customMessage) ? customMessage(input) : customMessage;
        return kendo.format(input.attr(kendo.attr(ruleKey + '-msg')) || input.attr('validationMessage') || nonDefaultMessage || input.attr('title') || customMessage || '', fieldName, input.attr(ruleKey) || input.attr(kendo.attr(ruleKey)));
    }
    // ...
})

 

With this technique you can customize one validation message for a model field

 

Simone
Top achievements
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 answered on 20 Mar 2018
3 answers
112 views

I have a cell that is not editable, it displays a value from the datasource.  While editing the row and changing other cells, a new value is calculated.  The datasource reflects the new value but the cell does not render it.

 

    export function init(columns: any) {
        var ds = new nkfDataSources.FilterByJobQuickEntryDistribution();
        ds.group = { field: "PropertyName" };
        grid = $("#jobQuickEntryDistributionGrid").kendoGrid({
            columns: columns,
            groupable: false,
            pageable: true,
            sortable: true,
            filterable: true,
            toolbar: kendo.template($("#grid_jobQuickEntryDistribution_toolbar").html()),
            dataSource: ds.get(onGridparameterMap),
            editable: true,
            edit: function (e) {
                e.model.unbind("change", model_change).bind("change", model_change);
            }
        }).data("kendoGrid");
    }

 

function model_change(e) {

    var model = this;

       model.NetFee = nkfCommon.Calculate.netFee(
            model.GrossFee,
            nkfCommon.Calculate.departmentOffset(model.GrossFee, model.DepartmentOffset),
            nkfCommon.Calculate.expenses(model.ClientReimbursedExpenses, model.NonClientReimbursedExpenses, model.DirectBilledExpenses));

}

 

 

Viktor Tachev
Telerik team
 answered on 20 Mar 2018
2 answers
390 views

Hi,

how can we render the Buttons to select another view (Daily, Weekly, Monthly, etc in the Header-Area of the Scheduler) as dropdown? Is there a template for that purpose so we would be able to render customized markup?

Thanks and regards
Hans

 

Hans
Top achievements
Rank 1
 answered on 20 Mar 2018
4 answers
894 views

Hello

I wanted to hide the vertical scrollbar in several widgets but still allowing the scrolling functionality. This doesn't seem to be an easy task since browser providers do not support officially.

Im looking now for a solution for the following widgets:
- kendoDropDownList
- kendoDialog

I have checked the forums here so far but could only find a proper solution for the window widget (which I couldn't make working for the mentioned widgets above). In between I've checked Stackoverlow and found an easy solution: Hide scrollbar
It works great for all standard HTML windows/tags I'm using in my project but I don't know how to apply this (or a similar) solution to the mentioned KendoUI widgets? Is there any solution?

Regards

Magdalena
Telerik team
 answered on 20 Mar 2018
11 answers
1.2K+ views

Hi,

I am using Kendo UI v2016.2.714. We have an issue in downloading the pdf in iphone and ipad. It is working perfectly in all other systems.

The method we are using to generate pdf is as below.

function download(selector) {
    kendo.drawing.drawDOM($(selector)).then(function(group){
        group.options.set("pdf", {
            paperSize: "auto",
            margin: {
                left   : "1cm",
                top    : "1cm",
                right  : "1cm",
                bottom : "1cm"
            }
        });
        kendo.drawing.pdf.saveAs(group, "test.pdf");
    });
}

 

Have any one of you faced similar issue? Please help us to fix this.

 

Thanks,

Anusha

Anusha
Top achievements
Rank 1
 answered on 19 Mar 2018
3 answers
927 views

 

I have found the expected behavior in the following link

https://docs.telerik.com/kendo-ui/knowledge-base/grid-edit-cell-on-double-click

here the issue is , when i do changes in on cell (cell-1) and double click on the another cell (cell-2 may be another row) , the changes are not retaining in edited cell (cell-1).  Could you please suggest the method or event to call to retain the changes. 

 

 

Viktor Tachev
Telerik team
 answered on 19 Mar 2018
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