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  • Overview
  • Key Features
  • Advanced Usage
  • Constants Summarized
  • Properties Summarized
  • Methods Summarized
  • Constants Detailed
  • ACTION
  • DATACHANGE
  • DOUBLECLICK
  • FOCUSGAINED
  • FOCUSLOST
  • FORM
  • MODIFIER_ALT
  • MODIFIER_CTRL
  • MODIFIER_META
  • MODIFIER_SHIFT
  • NONE
  • ONDRAG
  • ONDRAGEND
  • ONDRAGOVER
  • ONDROP
  • RIGHTCLICK
  • Properties Detailed
  • data
  • dataMimeType
  • Methods Detailed
  • getDragResult()
  • getElementName()
  • getFormName()
  • getModifiers()
  • getName()
  • getRecord()
  • getSource()
  • getTimestamp()
  • getType()
  • getX()
  • getY()

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  1. Reference
  2. Servoy Core
  3. Developer API
  4. Application

JSDNDEvent

Overview

The JSDNDEvent object is designed for use in drag-and-drop callback functions, offering detailed event information and support for client-server interaction. It integrates deeply with event management in scripting environments. ## Overview

Key Features

  • Constants for identifying event types (ONDRAG, ONDROP, etc.) and modifiers (MODIFIER_ALT, MODIFIER_SHIFT).

  • Properties such as data and dataMimeType to handle event-specific data transfer.

  • Methods for retrieving event details, such as getDragResult(), getType(), and positional data (getX(), getY()).

Advanced Usage

The JSDNDEventType class facilitates JSON conversion for events in browser contexts. It ensures that events with a source are correctly handled, mapping them to client-side representations using a WeakHashMap for efficient reference management.

Constants Summarized

Type
Name
Summary

Constant returned by JSEvent.

Constant returned by JSEvent.

Constant returned by JSEvent.

Constant returned by JSEvent.

Constant returned by JSEvent.

Constant returned by JSEvent.

Constant for the ALT modifier that can be returned by JSDNDEvent.

Constant for the CTRL modifier that can be returned by JSDNDEvent.

Constant for the META modifier that can be returned by JSDNDEvent.

Constant for the SHIFT modifier that can be returned by JSDNDEvent.

Constant returned by JSEvent.

Constant returned by JSDNDEvent.

Constant returned by JSDNDEvent.

Constant returned by JSDNDEvent.

Constant returned by JSDNDEvent.

Constant returned by JSEvent.

Properties Summarized

Type
Name
Summary

A data object that specific events can set, a user can set data back to the system for events that supports this.

The event data mime type.

Methods Summarized

Type
Name
Summary

Returns the result of the drag action.

returns the name of the element, can be null if the form was the source of the event.

returns the name of the form the element was placed on.

Returns the modifiers of the event, see JSDNDEvent.

Returns the name of the event which was triggered

Returns the record of the event.

returns the source component/element of the event.

Returns the time the event occurred.

returns the dnd event type see the JSDNDEvents constants what it can return.

Returns the x position of the event, relative to the component that fired it, if applicable.

Returns the y position of the event, relative to the component that fired it, if applicable.

Constants Detailed

ACTION

Constant returned by JSEvent.getType() in a method that is attached to an onAction event.

Sample

if (event.getType() == JSEvent.ACTION)
{
	// its an action event.
}

DATACHANGE

Constant returned by JSEvent.getType() in a method that is attached to an onDataChange event.

Sample

if (event.getType() == JSEvent.DATACHANGE)
{
	// its a data change event
}

DOUBLECLICK

Constant returned by JSEvent.getType() in a method that is attached to an onDoubleClick event.

Sample

if (event.getType() == JSEvent.DOUBLECLICK)
{
	// its a double click event.
}

FOCUSGAINED

Constant returned by JSEvent.getType() in a method that is attached to an onFocusGained or the forms onElementFocusGained event.

Sample

if (event.getType() == JSEvent.FOCUSGAINED)
{
	// its a focus gained event.
}

FOCUSLOST

Constant returned by JSEvent.getType() in a method that is attached to an onFocusLost or the forms onElementFocusLost event.

Sample

if (event.getType() == JSEvent.FOCUSLOST)
{
	// its a focus lost event.
}

FORM

Constant returned by JSEvent.getType() in a method that is attached to a form event (like onShow) or command (like onDeleteRecord)

Sample

if (event.getType() == JSEvent.FORM)
{
	// its a form event or command
}

MODIFIER_ALT

Constant for the ALT modifier that can be returned by JSDNDEvent.getModifiers();

Sample

//test if the SHIFT modifier is used.
if (event.getModifiers() & JSDNDEvent.MODIFIER_SHIFT)
{
	//do shift action
}

MODIFIER_CTRL

Constant for the CTRL modifier that can be returned by JSDNDEvent.getModifiers();

Sample

//test if the SHIFT modifier is used.
if (event.getModifiers() & JSDNDEvent.MODIFIER_SHIFT)
{
	//do shift action
}

MODIFIER_META

Constant for the META modifier that can be returned by JSDNDEvent.getModifiers();

Sample

//test if the SHIFT modifier is used.
if (event.getModifiers() & JSDNDEvent.MODIFIER_SHIFT)
{
	//do shift action
}

MODIFIER_SHIFT

Constant for the SHIFT modifier that can be returned by JSDNDEvent.getModifiers();

Sample

//test if the SHIFT modifier is used.
if (event.getModifiers() & JSDNDEvent.MODIFIER_SHIFT)
{
	//do shift action
}

NONE

Constant returned by JSEvent.getType() if the event is not used in a known event or command.

Sample

if (event.getType() == JSEvent.NONE)
{
	// type is not set.
}

ONDRAG

Constant returned by JSDNDEvent.getType() in a method that is attached to an onDrag event.

Sample

if (event.getType() == JSDNDEvent.ONDRAG)
{
	// its an ondrag event
	if (event.getElementName() == 'todragelement')
		return DRAGNDROP.COPY
}

ONDRAGEND

Constant returned by JSDNDEvent.getType() in a method that is attached to an onDragEnd event.

Sample

if (event.getType() == JSDNDEvent.ONDRAGEND)
{
	// its an on drag end event.
	// return true if the drop has been completed successfully
	return event.isDropSuccess();
}

ONDRAGOVER

Constant returned by JSDNDEvent.getType() in a method that is attached to an onDragOver event.

Sample

if (event.getType() == JSDNDEvent.ONDRAGOVER)
{
	// its an on drag over event.
	// return true if it over the right element.
	return event.getElementName() == 'candroponelement';
}

ONDROP

Constant returned by JSDNDEvent.getType() in a method that is attached to an onDrop event.

Sample

if (event.getType() == JSDNDEvent.ONDROP)
{
	// its a on drop event.
	var element = elements[event.getElementName()];
	// do drop on element
	return true;
}

RIGHTCLICK

Constant returned by JSEvent.getType() in a method that is attached to an onRightClick event.

Sample

if (event.getType() == JSEvent.RIGHTCLICK)
{
	// its a right click event.
}

Properties Detailed

data

A data object that specific events can set, a user can set data back to the system for events that supports this.

Sample

// A client design method that handles ondrag
if (event.getType() == JSEvent.ONDRAG)
{
     // the data is the selected elements array
     var elements = event.data;
     // only start a client design drag when there is 1 element
     if (elements.length == 1)
     {
     	return true;
     }
}

// code for a data drag method
event.data = "drag me!";
return DRAGNDROP.COPY;

// code for a data drop method
var data = event.data;
elements[event.getElementName()].setText(data);
return true;

dataMimeType

The event data mime type.

Sample

// only accept drag if data is a servoy record
function onDragOver(event)
{
	if(event.dataMimeType.indexOf("application/x-servoy-record-object") == 0) return true;
	else return false;
}

Methods Detailed

getDragResult()

Returns the result of the drag action.

Sample

function onDragEnd(event)
{
	var dragResult = event.getDragResult();
	if(dragResult == DRAGNDROP.NONE)
	{
		// the drag was canceled
	}
	else if(dragResult == DRAGNDROP.COPY)
	{
		// the drag ended with a copy action
	}
	else if(dragResult == DRAGNDROP.MOVE)
	{
		// the drag ended with a move action
	}
}

getElementName()

returns the name of the element, can be null if the form was the source of the event.

Sample

if (event.getElementName() == 'myElement')
{
    elements[event.getElementName()].bgcolor = '#ff0000';
}

getFormName()

returns the name of the form the element was placed on.

Sample

forms[event.getFormName()].myFormMethod();

getModifiers()

Returns the modifiers of the event, see JSDNDEvent.MODIFIER_XXXX for the modifiers that can be returned.

Sample

//test if the SHIFT modifier is used.
if (event.getModifiers() & JSDNDEvent.MODIFIER_SHIFT)
{
	//do shift action
}

getName()

Returns the name of the event which was triggered

Sample

var name = event.getName();

getRecord()

Returns the record of the event.

Sample

event.Record();

getSource()

returns the source component/element of the event. If it has a name the getElementName() is the name of this component.

Sample

// cast to runtime text field (change to anoter kind of type if you know the type)
/** @type {RuntimeTextField} */
var source = event.getSource();
var sourceDataProvider = source.getDataProviderID();

getTimestamp()

Returns the time the event occurred.

Sample

event.getTimestamp();

getType()

returns the dnd event type see the JSDNDEvents constants what it can return.

Sample

if (event.getType() == JSDNDEvent.ONDROP)
{
	// it's a drop
}

getX()

Returns the x position of the event, relative to the component that fired it, if applicable. For example drag'n'drop events will set the x,y positions.

Sample

var x = event.getX();
var xPrevious = previousEvent.getX();
var movedXPixels = x -xPrevious;

getY()

Returns the y position of the event, relative to the component that fired it, if applicable. For example drag'n'drop events will set the x,y positions.

Sample

var y = event.getY();
var yPrevious = previousEvent.getY();
var movedYPixels = y -yPrevious;

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Type a string representing the MIME type of the event data.

Returns: a DRAGNDROP constant, representing the result of the drag action

Returns: a String representing the element name.

Returns: a String representing the form name.

Returns: an int which holds the modifiers as a bitset.

Returns: name of event as string

Returns: Record of the event

Returns: an Object representing the source of this event.

Returns: a Date when this event happened.

Returns: a String representing the type of this event.

Returns: an int representing the X position.

Returns: an int representing the Y position.

String
String
String
String
String
String
Number
Number
Number
Number
String
String
String
String
String
String
Object
String
Number
String
String
Number
String
JSRecord
Object
Date
String
Number
Number
String
String
String
String
String
String
Number
Number
Number
Number
String
String
String
String
String
String
Object
String
Number
String
String
Number
String
JSRecord
Object
Date
String
Number
Number
ACTION
DATACHANGE
DOUBLECLICK
FOCUSGAINED
FOCUSLOST
FORM
MODIFIER_ALT
MODIFIER_CTRL
MODIFIER_META
MODIFIER_SHIFT
NONE
ONDRAG
ONDRAGEND
ONDRAGOVER
ONDROP
RIGHTCLICK
data
dataMimeType
getDragResult()
getElementName()
getFormName()
getModifiers()
getName()
getRecord()
getSource()
getTimestamp()
getType()
getX()
getY()