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PDFView Methods

The PDFView widget is associated with the following methods:

addGestureRecognizer Method

This API allows you to set a gesture recognizer for a specified gesture for a specified widget.

Syntax


addGestureRecognizer(gestureType, gestureConfigParams, onGestureClosure)

Parameters

gestureType

[Number] - Mandatory

Indicates the type of gesture to be detected on the widget.

See Remarks for possible values.

gestureConfigParams

[object] - Mandatory

The parameter specifies a table that has the required configuration parameters to setup a gesture recognizer.

The configuration parameters vary based on the type of the gesture.

See Remarks for possible values.

onGestureClosure

[function] - Mandatory

Specifies the function that needs to be executed when a gesture is recognized.

This function will be raised asynchronously

See Remarks for the syntax of this function.

Return Values

String - Reference to the gesture is returned.

Remarks

The values for the _gestureType_parameter are:

[Number] - Mandatory

Indicates the type of gesture to be detected on the widget. The following are possible values:

  • 1 – constants.GESTURE_TYPE_TAP
  • 2 - constants.GESTURE_TYPE_SWIPE
  • 3 – constants.GESTURE_TYPE_LONGPRESS
  • 4 – constants.GESTURE_TYPE_PAN
  • 5 – constants.GESTURE_TYPE_ROTATION
  • 6 - constants.GESTURE_TYPE_PINCH
  • 7 - constants.GESTURE_TYPE_RIGHTTAP

The values for the _gestureConfigParams_parameter are:

[object] - Mandatory

The parameter specifies a table that has the required configuration parameters to setup a gesture recognizer. The configuration parameters vary based on the type of the gesture.

This parameter supports the following key-value pairs:

Gesture Type:TAP

  • fingers [Number] - specifies the maximum number of fingers that must be respected for a gesture. Possible values are: 1. Default value is 1.
  • taps [Number] - specifies the maximum number of taps that must be respected for a gesture. Possible values are: 1 or 2. Default value is 1.

For example:

{fingers:1,taps:1}

Gesture Type:SWIPE

  • fingers [Number] - specifies the maximum number of fingers that must be respected for a gesture. Possible values are: 1. Default value is 1.

For example:

{fingers: 1}

Gesture Type:LONGPRESS

  • pressDuration [Number] - specifies the minimum time interval (in seconds) after which the gesture is recognized as a LONGPRESS. For example, if pressDuration is 2 seconds, any continued press is recognized as LONGPRESS only if it lasts for at least 2 seconds. Default value is 1. This is not applicable to Windows.

For example:

{pressDuration=1}.

Gesture Type: PAN

  • fingers [number] specifies the minimum number of fingers needed to recognize this gesture. Default value is 1.
  • continuousEvents [Boolean] indicates if callback should be called continuously for every change beginning from the time the gesture is recognized to the time it ends.

Gesture Type: ROTATION

  • Rotation gesture involves only two fingers.
  • continuousEvents [Boolean] indicates if callback must be called continuously for every change beginning from the time the gesture is recognized to the time it ends.

Gesture Type:PINCH

  • Pinch gesture invloves two fingures.
  • continuousEvents [Boolean] indicates if callback should be called continuously every change beginning from the time the gesture is recognized to the time it ends.

The syntax for the _onGestureClosure_callback function are:

[function] - Mandatory

Specifies the function that needs to be executed when a gesture is recognized.

This function will be raised asynchronously and has the following Syntax:

onGestureClosure(widgetRef, gestureInfo, context)

  • widgetRef - specifies the handle to the widget on which the gesture was recognized.
  • gestureInfo - Table with information about the gesture. The contents of this table vary based on the gesture type.
  • context - Table with SegmentedUI row details.

gestureInfo table has the following key-value pairs:

  • gestureType [number] – indicates the gesture type; 1 for TAP, 2 for SWIPE, and 3 for LONGPRESS,4 for PAN, 5 for ROTATION, 6 for PINCH and 7 for RIGHTTAP
  • gesturesetUpParams [object] – specifies the set up parameters passed while adding the gesture recognizer
  • gesturePosition [number] – indicates the position where the gesture was recognized. Possible values are: 1 for TOPLEFT, 2 for TOPCENTER, 3 for TOPRIGHT, 4 for MIDDLELEFT, 5 for MIDDLECENTER, 6 for MIDDLERIGHT, 7 for BOTTOMLEFT, 8 for BOTTOMCENTER, 9 for BOTTOMRIGHT, 10 for CENTER
  • swipeDirection [number] –indicates the direction of swipe. This parameter is applicable only if the gesture type is SWIPE. Possible values are: 1 for LEFT, 2 for RIGHT, 3 for TOP, 4 for BOTTOM. Direction is w.r.t the view and not device orientation.
  • gestureX [number] – specifies the X coordinate of the point (in pixels) where the gesture has occurred. The coordinate is relative to the widget coordinate system.
  • gestureY [number] – specifies the Y coordinate of the point (in pixels) where the gesture has occurred. The coordinate is relative to the widget coordinate system.
  • widgetWidth [number] – specifies the width of the widget (in pixels)
  • widgetHeight [number] – specifies the height of the widget (in pixels)
  • gestureState[number] – indicates the gesture state as below
  • 1 – gesture state begin
  • 2 - gesture state changed
  • 3 – gesture state ended.
  • * gestureState is applicable only for continuous gestures like PAN, ROTATION and PINCH.
  • rotation [number] rotation of the gesture in degrees since its last change.( Applicable only when gesture type is ROTATION
  • velocityX and velocityY : horizontal and vertical component of velocity expressed in points per second. (Applicable only for PAN gesture type)
  • velocity [number]: velocity of pinch in scale per second (Applicable for Pinch gesture)
  • scale [number]:scale factor relative to the points of the two touches in screen coordinates
  • touchType[number]:(windows only)
  • 0 - constants.TOUCHTYPE_FINGER
  • 1 - constants.TOUCHTYPE_PEN
  • 2 - constants.TOUCHTYPE_MOUSE
  • translationX and translationY [number] : cumulative distance as number. (Applicable only for PAN gesture type)

context table has the following key-value pairs:

  • rowIndex [number] : row index of the segui where gesture was recognised. (Applicable to gestures added to segUI rows)
  • sectionIndex [number] : section index of the segui where gesture was recognised. (Applicable to gestures added to segUI rows)

It is not recommend to define gestures for widgets that have a default behavior associated with it.

If you click (tap) a button (any clickable widget), the default behavior is to trigger an onClick event. If you define a Tap gesture on such widgets, the gesture closure is executed in addition to the onClick event.

If you swipe a larger form, the default behavior is to scroll up and down depending on the direction in which you swipe. If you define a SWIPE gesture on such forms, the gesture closure gets executed in addition to scrolling the form.

If you swipe a Segmented UI with huge number of rows, the default behavior is to scroll the Segmented UI. If you define a SWIPE gesture on such segments, the gesture closure gets executed in addition to scrolling the form.

Gestures can be added only for the following widgets:

  • Flex Container

  • Flex Scroll Container.

In the android platform, the top and bottom gestures work only when the scrolling is disabled for Form and parent scrolling containers. By default, the scrolling is enabled for the Form and scrolling containers.

  • RIGHTTAP applicable only to Windows 10
  • ROTATION is not supported on android.

Example


//Sample code to add Gestures to the frmGestures FlexForm.
//Code to add DOUBLE TAP gesture to the frmGestures, FlexForm.
var doubletp = {
 fingers: 1,
 taps: 2
};
frmGestures.addGestureRecognizer(1, doubletp, onGestureFunction);
//Code to add SINGLE TAP gesture to the frmGestures FlexForm.
var singleTp = {
 fingers: 1,
 taps: 1
};
frmGestures.addGestureRecognizer(1, singleTp, onGestureFunction);
//Code to add SWIPE gesture to the frmGestures FlexForm.
var swipeForm = {
 fingers: 1,
 swipedistance: 50,
 swipevelocity: 75
};
frmGestures.addGestureRecognizer(2, swipeForm, onGestureFunction);
//Code to add LONGPRESS gesture to the frmGestures FlexForm.
var longPressForm = {
 pressDuration: 2
};
frmGestures.addGestureRecognizer(3, longPressForm, onGestureFunction);

function onGestureFunction(commonWidget, gestureInfo) {
 voltmx.print("The Gesture type is:" + gestureInfo.gestureType);

}

Platform Availability

  • iOS, Windows

animate Method

Applies an animation to the widget.

Syntax


animate (animationObj, animateConfig, animationCallbacks)

Parameters

animationObj

An animation object created using voltmx.ui.createAnimation function.

animationConfig

As defined in widget level animation section.

animationCallbacks

A JavaScript dictionary that contains key-value pairs. The following keys are supported.

Key Description
animationEnd A JavaScript function that is invoked with the animation ends. For more information, see the Remarks section below.
animationStart A JavaScript function that is invoked with the animation starts. For more information, see the Remarks section below.

Return Values

Returns a platform-specific handle to the animation. This handle currently not used, but is returned for possible future requirements use.

Remarks

The callback for the animationStart key in the JavaScript object passed in this method's animationCallbacks parameter has the following signature.

animationStart(source, animationHandle, elapsedTime);

where source is the widget being animated, animationHandle is the handle returned by the applyAnimation method, and elapsedTime is the amount of time the animation has been running in seconds, when this event is fired..

This event occurs at the start of the animation. If there is 'animation-delay' configured then this event will fire only after the delay period. This event gets called asynchronously.

The callback for the animationEnd key in the JavaScript object passed in this method's animationCallbacks parameter has the following signature.

animationEnd(source, animationHandle, elapsedTime);

where source is the widget being animated, animationHandle is the handle returned by the applyAnimation method, and elapsedTime is the amount of time the animation has been running in seconds, when this event is fired.

This event occurs at the end of the animation. This event gets called asynchronously.

The animate method throws an Invalid Animation Definition Exception if animation definition, does not follow the dictionary structure expected. This method is ignored if it is called on a widget whose immediate parent is not FlexContainer or a FlexScrollContainer.

If the widget is not part of the currently visible view hierarchy, calling this method does nothing. Because this method is asynchronous and immediately returns, it does not wait for the animation to start or complete.

Example


//Sample code of animation
function AnimateBoth() {
    var getFuncName = frm1.listbox18.selectedKey;
    if (getFuncName == "BothLT") {
        frm1.textbox26.animate(myAnimDefinition(),
            animConfiguration(), {});
    } else if (getFuncName == "BothTBL") {
        frm1.textbox26.animate(myAnimDefinitionsc1(),
            animConfiguration(), {});
    }
}

Platform Availability

  • iOS, Android, Windows, and SPA

canGoBack Method

This method specifies whether the PDFView can navigate to the previous page in the page history.

Syntax


canGoBack()

Return Values

status

True - Indicates whether the user can navigate to the previous page of the document from the page history.

False - There is no previous page in the page history.

Example


//Sample code to invoke canGoBack method for a PDFView widget.
var canGoBack = this.view.myPDFView.canGoBack();
alert("canGoBack?::" + canGoBack);

Platform Availability

iOS

canGoForward Method

This method specifies whether the PDFView can navigate to the next page in the page history.

Syntax


canGoForward()

Return Values

status

True - Indicates whether the user can navigate to the next page of the document from the page history.

False - There is no next page in the page history.

Example


//Sample code to invoke canGoForward method for a PDFView widget.
var canGoForward = this.view.myPDFView.canGoForward();
alert("canGoForward?::" + canGoForward);

Platform Availability

iOS

canGoToFirstPage Method

This method specifies whether the PDFView can navigate to the first page of the document.

Syntax


canGoToFirstPage()

Return Values

status

True - Indicates whether the user can navigate to the first page of the document.

False - The user is already at the first page of the document.

Example


//Sample code to invoke canGoToFirstPage method for a PDFView widget.
var canGoToFirstPage = this.view.myPDFView.canGoToFirstPage();
alert("canGoToFirstPage?::" + canGoToFirstPage);

Platform Availability

iOS

canGoToLastPage Method

This method specifies whether the PDFView can navigate to the last page of the document.

Syntax


canGoToLastPage()

Return Values

status

True - Indicates whether the user can navigate to the last page of the document.

False - The user is already at the last page of the document.

Example


//Sample code to invoke canGoToLastPage method for a PDFView widget.
var canGoToLastPage = this.view.myPDFView.canGoToLastPage();
alert("canGoToLastPage?::" + canGoToLastPage);

Platform Availability

iOS

canGoToNextPage Method

This method specifies whether the PDFView can navigate to the next page of the document.

Syntax


canGoToNextPage()

Return Values

status

True - Indicates whether the user can navigate to the next page of the document.

False - The user is already at the next page of the document.

Example


//Sample code to invoke canGoToNextPage method for a PDFView widget.
var canGoToNextPage = this.view.myPDFView.canGoToNextPage();
alert("canGoToNextPage?::" + canGoToNextPage);

Platform Availability

iOS

canGoToPreviousPage Method

This method specifies whether the PDFView can navigate to the previous page of the document.

Syntax


canGoToPreviousPage()

Return Values

status

True - Indicates whether the user can navigate to the previous page of the document.

False - The user is already at the previous page of the document.

Example


//Sample code to invoke canGoToPreviousPage method for a PDFView widget.
var canGoToPreviousPage = this.view.myPDFView.canGoToPreviousPage();
alert("canGoToPreviousPage?::" + canGoToPreviousPage);

Platform Availability

iOS

canZoomIn Method

This method specifies whether the PDFView can magnify the view and zoom in.

Syntax


canZoomIn()

Return Values

status

True - Indicates whether the user can magnify the view and perform a zoom in operation.

False - User cannot perform zoom in on the PDFView widget.

Example


//Sample code to invoke canZoomIn method for a PDFView widget.
var canZoomIn = this.view.myPDFView.canZoomIn();
alert("canZoomIn?::" + canZoomIn);

Platform Availability

iOS

canZoomOut Method

This method specifies whether the PDFView can view an expanded area and zoom out.

Syntax


canZoomOut()

Return Values

status

True - Indicates whether the user can view an expanded area and perform a zoom out operation.

False - User cannot perform zoom out on the PDFView widget.

Example


//Sample code to invoke canZoomOut method for a PDFView widget.
var canZoomOut = this.view.myPDFView.canZoomOut();
alert("canZoomOut?::" + canZoomOut);

Platform Availability

iOS

clone Method

When this method is used on a container widget, then all the widgets inside the container are cloned. This method takes an optional parameter. If the widgetid is not passed then the cloned copy will have the same ID as original widget.

If the widget ID is passed as a parameter then it will be prefixed to the existing ID and will assign it to cloned copy of the container. For all other widgets of the container and its child widgets.

For example, if the widget ID is "fc1" and the widget ID passed to clone API is "ref1", then the cloned widget ID will be "ref1fc1". For a child widget placed in a container with widget ID as "wid1", the cloned copy will have the widget ID as "ref1wid1".

Exceptions are not displayed if widget ID parameter is not unique. Instead when the cloned copy is added to the same form as of original container then it may lead to unexpected behaviors. So it is your responsibility to provide unique widget ID.

Syntax


clone()

Parameters

widgetId [String]

Optional. Reference of the name of the widget.

Return Values

Cloned copy of the widget.

Exceptions

None

Remarks

  • This method is not supported on SegmentedUI2 widget.
  • Gestures for the FlexContainer are not cloned. You have to reapply the gestures on the cloned object.

  • In Android platform, cloned Map widget will not work if prefix is not passed as parameter to the API.

  • To apply focusSkin for dynamically created widgets or cloned widgets, assign focusSkin dynamically after adding the widget to the form hierarchy. This is applicable for SPA and Desktop web platforms.

formid.widgetid.focusSkin = "skinname";
  • To apply hoverSkin for dynamically created widgets or cloned widgets, assign hoverSkin dynamically after adding the widget to the form hierarchy. This is applicable for the Desktop web platform.
formid.widgetid.hoverSkin = "skinname";

Example


//This is a generic method that is applicable for various widgets.
//Here, we have shown how to use the clone Method for a FlexContainer widget.
//You need to make a corresponding call of the clone method for other applicable widgets.  
var flex2 = frmFlex.flexContainer1.clone();
//Here, flexContainer1 is a FlexContainer widget that is already present in frmFlex FlexForm.
frmFlex.add(flex2);
//For instance, the corresponding clone method call on the Label widget is as follows:
var myLabel=frmFlex.lbl1.clone();

Platform Availability

  • iOS, Android, Windows, and SPA

convertPointFromWidget Method

This method allows you to convert the coordinate system from a widget to a point (receiver's coordinate system).

Syntax


convertPointFromWidget(point, fromWidget)

Parameters

point

[JSObject]- Mandatory

You can specify an object with keys as x and y. You can specify the values in all (dp, px and %) units of measurement.

fromWidget

[widgetref]- Mandatory

This parameter is the handle to the widget instance. Based on this parameter, the coordinate system is converted from the widget to a point (receiver's coordinate system).

Example


Form1.widget1.convertPointFromWidget({
    x: "10dp",
    y: "20dp"
}, widget2);

Platform Availability

  • iOS, Android, Windows, and SPA

convertPointToWidget Method

Using the convertPointToWidget method, you can modify the co-ordinate system. You can convert the receiver's co-ordinate system from a point to a Widget.

Syntax


convertPointToWidget(point, toWidget)

Parameters

point

[JSObject]- Mandatory. You can specify an object with keys as x and y. You can specify the values in all (dp, px and %) units of measurement.

toWidget

[widgetref] - Mandatory. This parameter is the handle to the widget instance. Based on this parameter, the coordinate system is converted from a point to a widget.

Example


Form1.widget2.convertPointToWidget({
    x: "20dp",
    y: "30dp"
}, widget1);

Platform Availability

  • iOS, Android, Windows, and SPA

getCurrentPageIndex Method

This method provides the ability to get the current page number from the document.

Syntax


getCurrentPageIndex()

Return Values

Number

Example


//Sample code to invoke getCurrentPageIndex method for a PDFView widget.
var currentPageNo = this.view.myPDFView.getCurrentPageIndex();
alert("Current Page No?::" + currentPageNo);

Platform Availability

iOS

getDocumentHistory Method

This method provides the ability to get the dictionary of the document metadata.

Note: The dictionary may be empty, or only some of the keys may have associated values. Metadata is optional for PDF documents.

Syntax


getDocumentHistory()

Return Values

Array

The array might contain CreationDate, Producer, ModDate, Title, Creator, etc.

Example


//Sample code to invoke getCurrentPageIndex method for a PDFView widget.
var currentPageNo = this.view.myPDFView.getCurrentPageIndex();
alert("Current Page No?::" + currentPageNo);

Platform Availability

iOS

getPageCount Method

This method provides the ability to get the total number of pages present in the document.

Syntax


getPageCount()

Return Values

Number

Example


//Sample code to invoke getPageCount method for a PDFView widget.
var pageCount = this.view.myPDFView.getPageCount();
alert("PageCount?::" + pageCount);

Platform Availability

iOS

goBack Method

This method navigates you to the previous page in the page history.

Syntax


goBack()

Example


//Sample code to invoke goBack method for a PDFView widget.
this.view.myPDFView.goBack();

### OR

if(this.view.myPDFView.canGoBack())
{
    this.view.myPDFView.goBack();
}

Platform Availability

iOS

goForward Method

This method navigates you to the next page in the page history.

Syntax


goForward()

Example


//Sample code to invoke goForward method for a PDFView widget.
this.view.myPDFView.goForward();

### OR

if(this.view.myPDFView.canGoForward())
{
    this.view.myPDFView.goforward();
}

Platform Availability

iOS

goToFirstPage Method

This method specifies whether the PDFView can navigate to the first page of the document.

This type of navigation records the move in its page history.

Syntax


goToFirstPage()

Example


//Sample code to invoke goToFirstPage method for a PDFView widget.
this.view.myPDFView.goToFirstPage();

### OR

if(this.view.myPDFView.canGoToFirstPage())
{
    this.view.myPDFView.goToFirstPage();
}

Platform Availability

iOS

goToLastPage Method

This method specifies whether the PDFView can navigate to the last page of the document.

This type of navigation records the move in its page history.

Syntax


goToLastPage()

Example


//Sample code to invoke goToLastPage method for a PDFView widget.
this.view.myPDFView.goToLastPage();

### OR

if(this.view.myPDFView.canGoToLastPage())
{
    this.view.myPDFView.goToLastPage();
}

Platform Availability

iOS

goToNextPage Method

This method specifies whether the PDFView can navigate to the next page of the document.

This type of navigation records the move in its page history.

Syntax


goToNextPage()

Example


//Sample code to invoke goToNextPage method for a PDFView widget.
this.view.myPDFView.goToNextPage();

### OR

if(this.view.myPDFView.canGoToNextPage())
{
    this.view.myPDFView.goToNextPage();
}

Platform Availability

iOS

goToPage Method

This method provides the ability to scroll to the specified page of the document.

This type of navigation records the move in its page history.

Syntax


goToPage()

Example


//Sample code to invoke goToPage method for a PDFView widget.

this.view.myPDFView.goToPage=5(pagenumber);

Platform Availability

iOS

goToPreviousPage Method

This method specifies whether the PDFView can navigate to the previous page of the document.

This type of navigation records the move in its page history.

Syntax


goToPreviousPage()

Example


//Sample code to invoke goToPreviousPage method for a PDFView widget.
this.view.myPDFView.goToPreviousPage();

### OR

if(this.view.myPDFView.canGoToPreviousPage())
{
    this.view.myPDFView.goToPreviousPage();
}

Platform Availability

iOS

isPDFEncrypted Method

This method specifies whether the PDFView document is encrypted or not.

Syntax


isPDFEncrypted()

Return Values

status

True - Indicates that the PDF is encrypted.

False - Indicates that the PDF is not encrypted.

Example


//Sample code to invoke isPDFEncrypted method for a PDFView widget.
var isEncrypted = this.view.myPDFView.isPDFEncrypted();
alert("isPDFEncrypted?::" + isEncrypted);

Platform Availability

iOS

isPDFLocked Method

This method specifies whether the PDFView document is locked or not.

Note: You can only lock encrypted documents. When you open encrypted documents whose password is an empty string, they are unlocked automatically. The PDF Kit tries the empty string as a password if none is supplied.

Syntax


isPDFLocked()

Return Values

status

True - Indicates that the PDF is locked.

False - Indicates that the PDF is not locked.

Example


//Sample code to invoke isPDFLocked method for a PDFView widget.
var isLocked = this.view.myPDFView.isPDFLocked();
alert("isPDFEncrypted?::" + isLocked);

Platform Availability

iOS

registerForPeekandPop Method

This method registers a widget to enable 3D Touch peek and pop gestures.

Syntax


registerForPeekandPop(onPeekCallback, onPopCallback)

Parameters

onPeekCallback

A callback function that is invoked when the user slightly presses (soft press) the widget.

Callback Syntax

onPeekCallback(widget)

Callback Input Parameters

widget

A widget reference that is registered for peek and pop.

Callback Return Values

A PreviewInfoTable. See the Remarks section for a description of this table.

Callback Example


function onPeekCallback(widget) {
    var previewInfoTable = {
        "peekForm": frmSecond,
        "focusRect": [0, 0, 200, 200],
        "contentSize": [320, 480]
    };
    return previewInfoTable;
}

onPopCallback (Optional)

A callback function that is invoked when the user further presses (hard press) the preview that is displayed for the widget.

Callback Syntax

onPopCallback(widget,peekForm)

Callback Input Parameters

widget

A widget reference that is registered for peek and pop.

peekForm

A form reference that is displayed as preview/peek.

Callback Return Values

A form reference.

Callback Remarks

Use this callback to set the content for pop. The form handle returned by this callback is used for pop content. In general, the form that is used for preview is used for pop content also. If the pop callback is not implemented, peek disappears and the app returns to its previous state.

Callback Example


function onPopCallback(widget, peekForm) {
    // preview form used for pop also
    return peekForm;
}

Remarks

A PreviewInfoTable has the following format.

Name: peekForm

Description: The form reference that will be displayed as preview. If an invalid form reference is given, the preview will not be shown.

Type: form reference

Name: focusRect (Optional)

Description: An array representing a rectangle in widgets view coordinates. If provided, this rectangle will be focused while its surrounding area will be blurred, indicating a preview is available for the widget. If not provided, entire view area of the widget will be focused. If either the width or height is zero, the widget's view width/height is used. The values are supported in percentage(with regard to widget bounds), dp, or pixels. The values are strings. If a string value is given without any format specifier, it defaults to dp. If an array of numbers is given, it is assumed they are dp values.

Type: Array [x, y, width, height]

Example: [“0dp”, “0dp”, “200dp”, “300dp”], [“10%”, “10%”, “75%”, “50%”], [“10px”, “10px”, “200px”, “480px”]

Name: contentSize (Optional)

Description: An array representing the preferred content size of the preview. This allows the user to adjust the preferred width/height dimensions of the preview. If not provided, the preview is shown with default values. If either the width or height is zero, the default preview width/height is used. It is recommended that one of the width/height values be zero for proper adjustment of the other value. For example, if width = 0, the height is adjustable and vice versa. Providing positive values simultaneously for both width and height will result in distorted appearance of preview. The values are supported in dp, pixels, and percentage(with regard to screen bounds). The actual width/height of the preview may vary slightly due to resizing per aspect ratio. The values are strings. If a string value is given without any format specifier, it defaults to dp. If array of numbers is given, it is assumed they are dp values.

Type: Array [width, height]

Example: [“0dp”, “100dp”], [“100%”, “0%”], [“0px”, “240px”]

Example of a PreviewInfoTable:


var previewInfoTable = {
    "peekForm": frmSecond,
    "focusRect": [0, 0, 200, 200],
    "contentSize": [320, 480]
};

Return Values

None.

Platform Availability

  • iOS 9.0 and later

reload Method

This method provides you with the ability to reload the current web page.

Syntax


reload()

Example


//Sample code to invoke reload method for a Browser widget.
frmBrowser.myBrowser.reload();

Platform Availability

  • iOS
  • Android
  • Windows
  • SPA
  • Desktop Web

removeFromParent Method

This method allows you to remove a child widget from a parent widget.

Syntax


removeFromParent()

Read/Write

Yes - (Read and Write)

Example


//This is a generic method that is applicable for various widgets.
//Here, we have shown how to use the removeFromParent Method for a Calendar widget.
//You need to make a corresponding call of the removeFromParent method for other applicable widgets.

Form1.calendar.removeFromParent();

Platform Availability

  • iOS, Android , Windows, SPA, and Desktop Web

removeGestureRecognizer Method

This method allows you to remove the specified gesture recognizer for the specified widget.

Syntax


removeGestureRecognizer(gestureHandle)

Parameters

gestureHandle - Mandatory

Specifies the handle to the gesture returned by addGestureRecognizer call.

Example


//Sample code to remove Double tap gesture from frmGestures FlexForm.  
frmGestures.removeGestureRecognizer(doubletp);

Platform Availability

  • Available on all platforms except Desktop Web and Android.

setEnabled Method

This method specifies the widget that must be enabled or disabled.

Syntax


setEnabled(enabled)

Parameters

enabled

[Boolean] - Mandatory

true -Indicates widget is enabled.

false - Indicates widget is disabled.

Return Values

None

Exceptions

Error

Remarks

Browser widget does not support this method in SPA.

This method is not applicable in Map widget.

Example


//This is a generic method that is applicable for various widgets.
//Here, we have shown how to use the setEnabled Method for button widget.
//You need to make a corresponding call of the setEnabled method for other applicable widgets.

form1.myButton.setEnabled(false);

Platform Availability

Available on all platforms except SPA.

setGestureRecognizer Method

This method allows you to set a gesture recognizer for a specified gesture for a specified widget. You can set a Gesture recognizer only for a FlexForm, a FlexContainer, and a FlexScrollContainer. The setGestureRecognizer method is deprecated and should not be used in new software. However, Swipe Distance and Swipe Velocity parameters are not deprecated. So if you want to use the Swipe Distance and Swipe velocity parameters, use the setGestureRecognizer method. To use all other parameters, you must use the addGestureRecognizer method.

Syntax


setGestureRecognizer (gestureType,setupParams,gestureHandler)

Parameters

gestureType

[Number] - Mandatory

Specifies the type of gesture that needs to be detected on the widget. The following are possible values:

  • 1 for TAP
  • 2 for SWIPE
  • 3 for LONGPRESS

setupParams

[array of arrays] - Mandatory

The parameter specifies an object that has the configuration parameters to setup a gesture recognizer. See Remarks for the values for this parameter.

gestureHandler

[function] - Mandatory

The parameter specifies the function that needs to be executed when a gesture is recognized. See Remarks for the functions syntax.

onGesturefunction(widgetRef,gestureInfo)

  • widgetRef - This parameter specifies the handle to the widget on which the gesture was recognized.
  • gestureInfo - This parameter specifies an array that provides information about the gesture. The contents of this array vary based on the gesture type.

Volt MX Iris populates the details in the gestureInfo array. This array has the following key-value pairs:

  • gestureType [number] - indicates the gesture type; 1 for TAP, 2 for SWIPE, and 3 for LONGPRESS.
  • gesturesetUpParams [object] - this array is the set up parameters passed while adding the gesture recognizer.

  • gesturePosition [number] - indicates the position where the gesture was recognized. Possible values are: 1 for TOPLEFT, 2 for TOPCENTER, 3 for TOPRIGHT, 4 for MIDDLELEFT, 5 for MIDDLECENTER, 6 for MIDDLERIGHT, 7 for BOTTOMLEFT, 8 for BOTTOMCENTER, 9 for BOTTOMRIGHT, 10 for CENTER. This parameter is applicable only on iPhone.

  • swipeDirection [number] -indicates the direction of swipe. This parameter is applicable only if the gesture type is SWIPE. Possible values are: 1 for LEFT, 2 for RIGHT, 3 for TOP, 4 for BOTTOM.

  • gestureX [number] - specifies the X coordinate of the point (in pixels) where the gesture has occurred. The coordinate is relative to the widget coordinate system. This parameter is applicable only on iPhone.
  • gestureY [number] - specifies the Y coordinate of the point (in pixels) where the gesture has occurred. The coordinate is relative to the widget coordinate system. This parameter is applicable only on iPhone.
  • widgetWidth [number] - specifies the width of the widget (in pixels). This parameter is applicable only on iPhone.
  • widgetHeight [number] - specifies the height of the widget (in pixels). This parameter is applicable only on iPhone.

Return Values

String - Reference(uniqueidentifier) to the gesture is returned.

Exceptions

Error

Remarks

This method is applicable on Form, Box, and ScrollBox widgets only.

Configuration of setupParams

The configuration parameters vary based on the type of the gesture.

Gesture Type:TAP

  • fingers [number] - This parameter specifies the maximum number of fingers that must be respected for a gesture. Possible values are: 1. Default value is 1.
  • taps [number] - This parameter specifies the maximum number of taps that must be respected for a gesture. Possible values are: 1 or 2. Default value is 1.

For example:

{fingers:1,taps:1}

Gesture Type:SWIPE

  • fingers [number] - This parameter specifies the maximum number of fingers that must be respected for a gesture. Possible values are: 1. Default value is 1.
  • swipedistance [number] - This parameter specifies the distance between the pixel from where the swipe started to the pixel where the swipe stopped (finger is moved up or removed). The default value is 50 pixels. This parameter is applicable only on android. This parameter is applicable only if the gesture type is SWIPE.
  • swipevelocity [number] - This parameter specifies the velocity of the swipe measured in pixels per second. The default value is 75. This parameter is applicable only on android. This parameter is applicable only if the gesture type is SWIPE.

For example:

{fingers:1,swipedistance:50,swipevelocity:75}

Gesture Type:LONGPRESS

  • pressDuration [number] - This parameter specifies the minimum time interval (in seconds) after which the gesture is recognized as a LONGPRESS. For example, if the pressDuration is 2 seconds, any continued press is recognized as LONGPRESS only if it lasts for at least 2 seconds. Default value is 1. This parameter is not customizable on android platform. The default value on android platform is 500 ms. Any value you pass to this parameter is ignored and the default value is used.

For example:

{pressDuration:1}

Function syntax for the GestureHandler parameter

The parameter specifies the function that needs to be executed when a gesture is recognized. This function has the following Syntax:

onGesturefunction(widgetRef,gestureInfo)

  • widgetRef - This parameter specifies the handle to the widget on which the gesture was recognized.
  • gestureInfo - This parameter specifies an array that provides information about the gesture. The contents of this array vary based on the gesture type.

Volt MX Iris populates the details in the gestureInfo array. This array has the following key-value pairs:

  • gestureType [number] - indicates the gesture type; 1 for TAP, 2 for SWIPE, and 3 for LONGPRESS.
  • gesturesetUpParams [object] - this array is the set up parameters passed while adding the gesture recognizer.

  • gesturePosition [number] - indicates the position where the gesture was recognized. Possible values are: 1 for TOPLEFT, 2 for TOPCENTER, 3 for TOPRIGHT, 4 for MIDDLELEFT, 5 for MIDDLECENTER, 6 for MIDDLERIGHT, 7 for BOTTOMLEFT, 8 for BOTTOMCENTER, 9 for BOTTOMRIGHT, 10 for CENTER. This parameter is applicable only on iPhone.

  • swipeDirection [number] -indicates the direction of swipe. This parameter is applicable only if the gesture type is SWIPE. Possible values are: 1 for LEFT, 2 for RIGHT, 3 for TOP, 4 for BOTTOM.

  • gestureX [number] - specifies the X coordinate of the point (in pixels) where the gesture has occurred. The coordinate is relative to the widget coordinate system. This parameter is applicable only on iPhone.
  • gestureY [number] - specifies the Y coordinate of the point (in pixels) where the gesture has occurred. The coordinate is relative to the widget coordinate system. This parameter is applicable only on iPhone.
  • widgetWidth [number] - specifies the width of the widget (in pixels). This parameter is applicable only on iPhone.
  • widgetHeight [number] - specifies the height of the widget (in pixels). This parameter is applicable only on iPhone.

Example


//The below function will get invoked  when a gesture is recognized. 
function myTap(myWidget, gestureInfo) {
    alert(" Tap Gesture detected");
    alert("gestureType :" + gestureInfo.gestureType);
    alert("gesturePosition :" + gestureInfo.gesturePosition);
    //write any further logic here
}

//Setting Gesture configuration.
var setupTblTap = {
    fingers: 1,
    taps: 2
}; //double tap gesture

//To add a TAP gesture recognizer on a hbox with ID hbx1 placed on a form frm1
var tapGesture = frm1.hbx1.setGgestureRecognizer(1, setupTblTap, myTap);

Platform Availability

  • iOS, Windows, and SPA

setOnPeek Method

This method sets and overrides the existing onPeekCallback for the widget.

Syntax


setOnPeek(onPeekCallback)

Parameters

onPeekCallback

A callback function that is invoked when the user slightly presses (soft press) the widget.

Callback Syntax

onPeekCallback(widget)

Callback Parameters

widget

A widget reference that is registered for peek and pop.

Callback Return Values

PreviewInfoTable. See the Remarks section for a description of this table.

Callback Example


function onPeekCallback(widget, contextInfo) {
    var previewInfoTable = {
        "peekForm": frmSecond,
        "focusRect": [0, 0, 200, 200],
        "contentSize": [320, 480]
    };
    return previewInfoTable;
}

Return Values

None.

Remarks

A PreviewInfoTable has the following format.

Name: peekForm

Description: The form reference that will be displayed as preview. If an invalid form reference is given, the preview will not be shown.

Type: form reference

Name: focusRect (Optional)

Description: An array representing a rectangle in widgets view coordinates. If provided, this rectangle will be focused while its surrounding area will be blurred, indicating a preview is available for the widget. If not provided, entire view area of the widget will be focused. If either the width or height is zero, the widget's view width/height is used. The values are supported in percentage(with regard to widget bounds), dp, or pixels. The values are strings. If a string value is given without any format specifier, it defaults to dp. If an array of numbers is given, it is assumed they are dp values.

Type:Array [x, y, width, height]

Example: [“0dp”, “0dp”, “200dp”, “300dp”], [“10%”, “10%”, “75%”, “50%”], [“10px”, “10px”, “200px”, “480px”]

Name:contentSize (Optional)

Description:An array representing the preferred content size of the preview. This allows the user to adjust the preferred width/height dimensions of the preview. If not provided, the preview is shown with default values. If either the width or height is zero, the default preview width/height is used. It is recommended that one of the width/height values be zero for proper adjustment of the other value. For example, if width = 0, the height is adjustable and vice versa. Providing positive values simultaneously for both width and height will result in distorted appearance of preview. The values are supported in dp, pixels, and percentage(with regard to screen bounds). The actual width/height of the preview may vary slightly due to resizing per aspect ratio. The values are strings. If a string value is given without any format specifier, it defaults to dp. If array of numbers is given, it is assumed they are dp values.

Type:Array [width, height]

Example: [“0dp”, “100dp”], [“100%”, “0%”], [“0px”, “240px”]

Example of a PreviewInfoTable:


var previewInfoTable = {
    "peekForm": frmSecond,
    "focusRect": [0, 0, 200, 200],
    "contentSize": [320, 480]
};

Example


function settingPeek() {
    Form1.setOnPeek(onMyPeekcallback);
}

function onMyPeekcallback(widgetref, contextInfo) {
    if (typeof(contextInfo) === undefined) {
        return null;
    }

    var previewInfoTable = {
        "peekForm": frmSecond,
        "focusRect": [0, 0, 200, 200],
        "contentSize": [320, 480]
    };
    return previewInfoTable;

}

Platform Availability

  • iOS 9.0 and later

setOnPop Method

This method overrides the existing onPopCallback for the widget.

Syntax


setOnPop(onPopCallback)

Parameters

onPopCallback

A callback function that is invoked when the user slightly presses (soft press) the widget.

Callback Syntax

onPopCallback(widget,peekForm)

Callback Parameters

widget

A widget reference that is registered for peek and pop.

peekForm

A form reference that is displayed as preview/peek.

Callback Return Values

A form reference.

Callback Remarks

Use this callback to set the content for pop. The form handle returned by this callback is used for pop content. In general, the form that is used for preview is used for pop content also. If the pop callback is not implemented, peek disappears and the app returns to its previous state.

Callback Example


function onPopCallback(widget, peekForm) {
    // preview form used for pop also
    return peekForm;
}

Return Values

None.

Example


function settingPop() {
    Form1.setOnPop(myonPopcallback);
}

function myonPopcallback(widgetref, peekForm) {
    // preview form used for pop also
    return peekForm;
}

Platform Availability

  • iOS 9.0 and later

setVisibility Method

Use this method to set the visibility of the widget.

Default : true

Syntax


setVisibility(visible)

Parameters

visible

[Boolean] - Mandatory

true -Indicates visibility is true.

false - Indicates visibility is false.

animationConfig

[JSObject] - Optional. The parameter specifies the animation configuration of the object. This is not supported in SPA and Desktop Web platforms.

Following are the parameters of the JSObject:

animEffect

Optional. The parameter specifies the animation effect. Following are the available options of animation effect:

  • constants.ANIMATION_EFFECT_EXPAND: This is applicable when the visibility is turned on. Specifies the widget must expand gradually by increasing the height of the widget.
  • constants.ANIMATION_EFFECT_COLLAPSE: This is applicable when the visibility is turned off. Specifies the widget must collapse gradually by decreasing the height of the widget.
  • constants.ANIMATION_EFFECT_REVEAL: This is applicable when the visibility is turned on. Specifies the widget must appear gradually by decreasing the transparency of the widget.
  • constants.ANIMATION_EFFECT_FADE: This is applicable when the visibility is turned off. Specifies the widget must disappear gradually by increasing the transparency of the widget.
  • constants.ANIMATION_EFFECT_NONE: This is the default option. Specifies animation should not be applied to the widget. However the layout animations are applied on the Form.

animDuration

Optional. The parameter specifies the duration of the animation effect in seconds. The default value is 1 second. The negative values are ignored and defaulted to 1 second.

animDelay

Optional. This parameter specifies the delay of the animation effect in seconds. The default value is 0 second. The negative values are ignored and defaulted to 0 second.

animCurve

Optional. The parameter specifies the animation curve to be applied while playing the animation. An animation curve defines the speed of the animations at different intervals of the animation duration. Following are the available options of animation curve:

  • constants.ANIMATION_CURVE_EASEIN: Specifies the animation effect to start slow in the beginning.
  • constants.ANIMATION_CURVE_EASEOUT: Specifies the animation effect to slowdown towards the end.
  • constants.ANIMATION_CURVE_EASEINOUT: Specifies the animation effect to start slow and slowdown towards the end.
  • constants.ANIMATION_CURVE_LINEAR: This is the default value. Specifies the animation effect to continue with the same speed from start to end.

animCallBacks - Optional

It is a JS dictionary containing the events invoked by the platform during the animation life cycle. Following are the available events:

  • animStarted: Invoked at the beginning of the animation without any parameters. Following is the Syntax of the event: function animStarted()
  • animEnded: Invoked at the end of the animation without any parameters. Following is the Syntax of the event: function animEnded()

Return Values

None

Exceptions

Error

Remarks

This method is not applicable on Form, Popup, and Alert. It is also not applicable if the widget is placed in a Segment. When the widget is placed in a Segment, the default Visibility is set to true. If you want to change the value to false, you can do so by using Segment methods.

Passing an invalid type other than the above events lead to run time exceptions/ crashes.

This method is not supported on the widgets FlexForm, FlexContainer, and FlexScrollContainer.

Example


//This is a generic method that is applicable for various widgets.
//Here, we have shown how to invoke the setVisibility Method for a button widget with animation.
//You need to make a corresponding call of the setVisibility method for other applicable widgets.

form1.myButton.setVisibility(
    false, {
        "animEffect": constants.ANIMATION_EFFECT_COLLAPSE,
        "animDuration": 1,
        "animDelay": 0,
        "animCurve": constants.ANIMATION_CURVE_LINEAR,
        "animCallBacks": {
            "animStarted": startCallBackFunc,
            "animEnded": endCallBackFunc
        }
    });
//Sample code to invoke setVisibility Method for button widget without animation.
form1.myButton.setVisibility(false);

Platform Availability

Available on all platforms.

unregisterForPeekandPop Method

This method unregisters a widget from 3D Touch peek and pop gestures.

Syntax


unregisterForPeekandPop()

Parameters

None.

Return Values

None.

Example


Form1.unregisterForPeekAndPop();

Platform Availability

  • iOS 9.0 and later

zoomIn Method

This method provides the ability to zoom in by increasing the scaling factor.

Each invocation of zoomIn multiplies the scaling factor by the square root of 2.

Syntax


zoomIn()

Example


//Sample code to invoke zoomIn method for a PDFView widget.
this.view.myPDFView.zoomIn();

### OR

if(this.view.myPDFView.canZoomIn())
{
    this.view.myPDFView.zoomIn();
}

Platform Availability

iOS

zoomOut Method

This method provides the ability to allow zoom out by decreasing the scaling factor.

Each invocation of zoomOut divides the scaling factor by the square root of 2.

Syntax


zoomOut()

Example


//Sample code to invoke zoomIn method for a PDFView widget.
this.view.myPDFView.zoomOut();

### OR

if(this.view.myPDFView.canZoomOut())
{
    this.view.myPDFView.zoomOut();
}

Platform Availability

iOS