Tag Archives: Lightning

Find Out Which Button was Clicked in Lightning Component

Biswajeet   December 15, 2017   No Comments on Find Out Which Button was Clicked in Lightning Component

To find out which button was clicked in a component containing multiple buttons, we can use Component.getLocalId().

Here is an example with multiple lightning:button components. Each button has a unique local ID, set by an aura:id attribute.

Sample Lightning Component:

<!--Sample.cmp-->
<aura:component>
    <aura:attribute name="clickedButton" type="String" />
    <div class="slds-m-around_xx-large">
        <p><b>You Clicked: {!v.clickedButton}</b></p>
        <br/>
        <lightning:button aura:id="button1" name="btn1" label="Click Me" onclick="{!c.buttonClick}"/>
        <lightning:button aura:id="button2" name="btn2" label="Click Me" onclick="{!c.buttonClick}"/>
    </div>
</aura:component>

In the JS controller, we can use one of the following methods to find out which button was clicked.
event.getSource().getLocalId() returns the aura:id of the clicked button.
event.getSource().get("v.name") returns the name of the clicked button.

Sample Lightning Component JS Controller:

({
    buttonClick : function(cmp, event, helper) {
        var clickedBtn = event.getSource().getLocalId();
        alert(clickedBtn);
        cmp.set("v.clickedButton", clickedBtn);
    }
})

Lightning Test App:

<!--Test.app-->
<aura:application extends="force:slds">
    <c:Sample />
</aura:application>

Output:

Progress Indicator in Lightning Component

Biswajeet   December 14, 2017   6 Comments on Progress Indicator in Lightning Component

Progress Indicator Component:

<!--ProgressIndicator.cmp-->
<aura:component >
    <aura:attribute name="selectedStep" type="string" default="step1"/>
    <div class="slds-m-around_xx-large">
        
        <lightning:progressIndicator currentStep="{!v.selectedStep}" type="base">
            <lightning:progressStep label="Step One" value="step1" onclick="{!c.selectStep1}"/>
            <lightning:progressStep label="Step Two" value="step2" onclick="{!c.selectStep2}"/>
            <lightning:progressStep label="Step Three" value="step3" onclick="{!c.selectStep3}"/>
            <lightning:progressStep label="Step Four" value="step4" onclick="{!c.selectStep4}"/>
        </lightning:progressIndicator>
        
        <div class="slds-p-around--medium">
            <div class="{!v.selectedStep == 'step1' ? 'slds-show' : 'slds-hide'}">
                <p><b>Step 1</b></p>
            </div>
            <div class="{!v.selectedStep == 'step2' ? 'slds-show' : 'slds-hide'}">
                <p><b>Step 2</b></p>
            </div>
            <div class="{!v.selectedStep == 'step3' ? 'slds-show' : 'slds-hide'}">
                <p><b>Step 3</b></p>
            </div>
            <div class="{!v.selectedStep == 'step4' ? 'slds-show' : 'slds-hide'}">
                <p><b>Step 4</b></p>
            </div>
        </div>
        
        <div>
            <button disabled="{!v.selectedStep != 'step1' ? '' : 'disabled'}" class="slds-button slds-button--neutral" onclick="{!c.handlePrev}">Back</button>  
            <aura:if isTrue="{!v.selectedStep != 'step4'}">
                <button class="slds-button slds-button--brand" onclick="{!c.handleNext}">Next</button>
            </aura:if>
            <aura:if isTrue="{!v.selectedStep == 'step4'}">   
                <button class="slds-button slds-button--brand" onclick="{!c.handleFinish}">Finish</button>  
            </aura:if>
        </div>
    </div>
</aura:component>

Progress Indicator Component JS Controller:

({
    handleNext : function(component,event,helper){
        var getselectedStep = component.get("v.selectedStep");
        if(getselectedStep == "step1"){
            component.set("v.selectedStep", "step2");
        }
        else if(getselectedStep == "step2"){
            component.set("v.selectedStep", "step3");
        }
         else if(getselectedStep == "step3"){
            component.set("v.selectedStep", "step4");
        }
    },
    
    handlePrev : function(component,event,helper){
        var getselectedStep = component.get("v.selectedStep");
        if(getselectedStep == "step2"){
            component.set("v.selectedStep", "step1");
        }
        else if(getselectedStep == "step3"){
            component.set("v.selectedStep", "step2");
        }
        else if(getselectedStep == "step4"){
            component.set("v.selectedStep", "step3");
        }
    },
    
    handleFinish : function(component,event,helper){
        alert('Finished...');
        component.set("v.selectedStep", "step1");
    },
    
    selectStep1 : function(component,event,helper){
        component.set("v.selectedStep", "step1");
    },
    selectStep2 : function(component,event,helper){
        component.set("v.selectedStep", "step2");
    },
    selectStep3 : function(component,event,helper){
        component.set("v.selectedStep", "step3");
    },
    selectStep4 : function(component,event,helper){
        component.set("v.selectedStep", "step4");
    },
})

Lightning Test App:

<!--Test.app-->
<aura:application extends="force:slds">
    <c:ProgressIndicator />
</aura:application>

Output:

Note: To create “base” style progress indicator you have need to add type="base" attribute in your lightning:progressIndicator tag in lightning component.

Modal Box in Lightning Component

Biswajeet   December 14, 2017   No Comments on Modal Box in Lightning Component

Modal Popup Component:

<!--ModalPopup.app-->
<aura:component>
    <aura:attribute name="openModal" type="boolean" default="false"/>
    <div class="slds-m-around--xx-large">
        <button class="slds-button slds-button--brand" onclick="{!c.handleOpenModal}">Open Modal</button>  
        <aura:if isTrue="{!v.openModal}">
            <!--Modal Box Start--> 
            <div role="dialog" class="slds-modal slds-fade-in-open ">
                <div class="slds-modal__container">
                    <div class="slds-modal__header">
                        <button class="slds-button slds-modal__close slds-button--icon-inverse" title="Close" onclick="{!c.handleCloseModal}">
                            X
                            <span class="slds-assistive-text">Close</span>
                        </button>
                        <h1 class="slds-text-heading--medium">Biswajeet Samal</h1>
                    </div>
                    
                    <!--Modal Box Header--> 
                    <div class="slds-modal__content slds-p-around--medium">
                        <center> <p><b>
                            Welcome to Biswajeet Samal's Blog
                            </b>
                            </p></center>
                    </div>
                    <!--Modal Box Button--> 
                    <div class="slds-modal__footer">
                        <button class="slds-button slds-button--brand" onclick="{!c.handleCloseModal}">Cancel</button>
                    </div>
                </div>
            </div>
            <div class="slds-backdrop slds-backdrop--open"></div>            
        </aura:if>
    </div>
</aura:component>

Modal Popup Component JS Controller:

({
    handleOpenModal: function(component, event, helper) {
        //For Display Modal, Set the "openModal" attribute to "true"
        component.set("v.openModal", true);
    },
    
    handleCloseModal: function(component, event, helper) {
        //For Close Modal, Set the "openModal" attribute to "fasle"  
        component.set("v.openModal", false);
    }
})

Lightning Test App:

<!--Test.app-->
<aura:application extends="force:slds">
    <c:ModalPopup />
</aura:application>

Output:

Toggle Checkbox in Lightning Component

Biswajeet   December 13, 2017   3 Comments on Toggle Checkbox in Lightning Component

Sample Lightning Component:

<!--Sample.cmp-->
<aura:component>
    <aura:attribute name="toggleValue" type="String"/>
    <div class="slds-m-around--large">
        <div class="slds-form-element">
            <label class="slds-checkbox_toggle slds-grid">
                <span class="slds-form-element__label slds-m-bottom_none">Toggle Label </span>
                <ui:inputCheckbox aura:id="chkbox" class="slds-input" change="{!c.selectChange}"/>
                <span id="toggle-desc" class="slds-checkbox_faux_container" aria-live="assertive">
                    <span class="slds-checkbox_faux"></span>
                    <span class="slds-checkbox_on">Enabled</span>
                    <span class="slds-checkbox_off">Disabled</span>
                </span>
            </label>
            <p><b>The toggle is {!v.toggleValue} </b></p>
        </div> 
    </div> 
</aura:component>

Sample Lightning Component JS Controller:

({
    selectChange : function(cmp, event, helper) {
        var checkCmp = cmp.find("chkbox");
        cmp.set("v.toggleValue" ,  checkCmp.get("v.value"));
    }
})

Output: