rwt.remote.EventUtil.js Maven / Gradle / Ivy
/*******************************************************************************
* Copyright (c) 2002, 2019 Innoopract Informationssysteme GmbH and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Innoopract Informationssysteme GmbH - initial API and implementation
* EclipseSource - ongoing development
******************************************************************************/
namespace( "rwt.remote" );
(function() {
var self;
rwt.remote.EventUtil = {
_suspended : false,
setSuspended : function( value ) {
self._suspended = value;
},
getSuspended : function() {
return self._suspended;
},
DOUBLE_CLICK_TIME : 500,
_capturingWidget : null,
_lastMouseDown : {
widget : null,
button : "",
x : -1,
y : -1,
mouseUpCount : 0
},
_shiftKey : false,
_ctrlKey : false,
_altKey : false,
_metaKey : false,
_button : rwt.event.MouseEvent.C_BUTTON_NONE,
eventTimestamp : function() {
var init = rwt.runtime.System.getInstance();
return ( new Date().getTime() - init.getStartupTime() ) % 0x7fffffff;
},
widgetDefaultSelected : function( event ) {
self.notifyDefaultSelected( event.getTarget() );
},
widgetSelected : function( event ) {
var left = event.getTarget().getLeft();
var top = event.getTarget().getTop();
var width = event.getTarget().getWidth();
var height = event.getTarget().getHeight();
self.notifySelected( event.getTarget(), left, top, width, height );
},
notifySelected : function( target ) {
if( !self.getSuspended() && !target.isDisposed() ) {
var connection = rwt.remote.Connection.getInstance();
var properties = self._createSelectionProperties.apply( this, arguments );
connection.getRemoteObject( target ).notify( "Selection", properties );
}
},
notifyDefaultSelected : function( target ) {
if( !self.getSuspended() && !target.isDisposed() ) {
var connection = rwt.remote.Connection.getInstance();
var properties = self._createSelectionProperties.apply( this, arguments );
connection.getRemoteObject( target ).notify( "DefaultSelection", properties );
}
},
_createSelectionProperties : function() {
var properties;
if( arguments.length === 2 ) {
properties = arguments[ 1 ];
} else {
properties = {
"x" : arguments[ 1 ],
"y" : arguments[ 2 ],
"width" : arguments[ 3 ],
"height" : arguments[ 4 ],
"detail" : arguments[ 5 ]
};
}
self.addButtonToProperties( properties );
self.addModifierToProperties( properties );
return properties;
},
addButtonToProperties : function( properties, event ) {
var button = event ? event.getButton() : self._button;
switch( button ) {
case rwt.event.MouseEvent.C_BUTTON_LEFT:
properties.button = 1;
break;
case rwt.event.MouseEvent.C_BUTTON_MIDDLE:
properties.button = 2;
break;
case rwt.event.MouseEvent.C_BUTTON_RIGHT:
properties.button = 3;
break;
default:
properties.button = 0;
break;
}
},
addModifierToProperties : function( properties, event ) {
var isMac = rwt.client.Client.getPlatform() === "mac";
var commandKey = isMac && ( event ? event.metaKey : self._metaKey ) === true;
properties.shiftKey = event ? event.shiftKey : self._shiftKey;
properties.ctrlKey = ( event ? event.ctrlKey : self._ctrlKey ) || commandKey;
properties.altKey = event ? event.altKey : self._altKey;
},
focusGained : function( event ) {
if( !self.getSuspended() ) {
var remoteObject = rwt.remote.Connection.getInstance().getRemoteObject( event.getTarget() );
remoteObject.notify( "FocusIn" );
}
},
focusLost : function( event ) {
if( !self.getSuspended() ) {
var remoteObject = rwt.remote.Connection.getInstance().getRemoteObject( event.getTarget() );
remoteObject.notify( "FocusOut" );
}
},
///////////////////////
// Mouse event handling
mouseDown : function( event ) {
if( !self.getSuspended() && self._isRelevantMouseEvent( this, event ) ) {
// disabled capturing as it interferes with Combo capturing
// see https://bugs.eclipse.org/bugs/show_bug.cgi?id=262171
// from now on, redirect mouse event to this widget
// this.setCapture( true );
self._capturingWidget = this;
// Collect request parameters and send
self._notifyMouseListeners( this, event, "MouseDown" );
}
},
mouseUp : function( event ) {
if( !self.getSuspended() && self._isRelevantMouseEvent( this, event ) ) {
// disabled capturing as it interferes with Combo capturing
// see https://bugs.eclipse.org/bugs/show_bug.cgi?id=262171
// release mouse event capturing
// this.setCapture( false );
self._capturingWidget = null;
// Add mouse-up request parameter
self._notifyMouseListeners( this, event, "MouseUp" );
}
},
mouseDoubleClick : function( event ) {
if( !self.getSuspended() && self._isRelevantMouseEvent( this, event ) ) {
// disabled capturing as it interferes with Combo capturing
// see https://bugs.eclipse.org/bugs/show_bug.cgi?id=262171
// from now on, redirect mouse event to this widget
// this.setCapture( true );
self._capturingWidget = this;
// Add parameters for double-click event
if( self._isDoubleClick( this, event ) ) {
self._clearLastMouseDown();
self._notifyMouseListeners( this, event, "MouseDoubleClick" );
} else {
// Store relevant data of current event to detect double-clicks
var lastMouseDown = self._lastMouseDown;
lastMouseDown.widget = this;
lastMouseDown.button = event.getButton();
lastMouseDown.x = event.getPageX();
lastMouseDown.y = event.getPageY();
lastMouseDown.mouseUpCount = 0;
rwt.client.Timer.once( self._clearLastMouseDown, this, self.DOUBLE_CLICK_TIME );
}
}
},
mouseUpCounter : function( event ) {
if( !self.getSuspended() && self._isRelevantMouseEvent( this, event ) ) {
// disabled capturing as it interferes with Combo capturing
// see https://bugs.eclipse.org/bugs/show_bug.cgi?id=262171
// release mouse event capturing
// this.setCapture( false );
self._capturingWidget = null;
// increase number of mouse-up events since last stored mouse down
self._lastMouseDown.mouseUpCount += 1;
}
},
/**
* Determines whether the event is relevant (i.e. should be sent) for the
* given widget.
* @param widget - the listening widget
* @param event - the mouse event
*/
_isRelevantMouseEvent : function( widget, event ) {
var result = true;
if( widget !== self._capturingWidget && widget !== event.getOriginalTarget() ) {
// find parent control and ensure that it is the same as the widget-
// parameter. Otherwise the mouse event is ignored.
var widgetManager = rwt.remote.WidgetManager.getInstance();
var target = event.getOriginalTarget();
var control = widgetManager.findEnabledControl( target );
result = widget === control;
}
return result;
},
_clearLastMouseDown : function() {
var lastMouseDown = self._lastMouseDown;
lastMouseDown.widget = null;
lastMouseDown.button = "";
lastMouseDown.mouseUpCount = 0;
lastMouseDown.x = -1;
lastMouseDown.y = -1;
},
_isDoubleClick : function( widget, event ) {
var lastMouseDown = self._lastMouseDown;
return lastMouseDown.mouseUpCount === 1
&& lastMouseDown.widget === widget
&& lastMouseDown.button === rwt.event.MouseEvent.C_BUTTON_LEFT
&& lastMouseDown.button === event.getButton()
&& self._isCloseTo( lastMouseDown.x,
lastMouseDown.y,
event.getPageX(),
event.getPageY() );
},
_isCloseTo : function( lastX, lastY, x, y ) {
return x >= lastX - 5 && x <= lastX + 5 && y >= lastY - 5 && y <= lastY + 5;
},
_notifyMouseListeners : function( widget, event, eventType ) {
var properties = {
"x" : event.getPageX(),
"y" : event.getPageY(),
"time" : self.eventTimestamp()
};
self.addButtonToProperties( properties, event );
self.addModifierToProperties( properties );
rwt.remote.Connection.getInstance().getRemoteObject( widget ).notify( eventType, properties );
},
helpRequested : function( event ) {
if( event.getKeyIdentifier() === "F1" ) {
// stop further handling and default handling by the browser
event.stopPropagation();
event.preventDefault();
// send help request to server
var widget = event.getTarget();
var widgetManager = rwt.remote.WidgetManager.getInstance();
var id = widgetManager.findIdByWidget( widget );
if( id === null ) {
// find parent control for the widget that received the event in case
// it wasn't the control itself that received the event
widget = widgetManager.findControl( widget );
id = widgetManager.findIdByWidget( widget );
}
if( id != null ) {
var remoteObject = rwt.remote.Connection.getInstance().getRemoteObject( widget );
remoteObject.notify( "Help" );
}
}
},
menuDetectedByKey : function( event ) {
if( event.getKeyIdentifier() === "Apps" ) {
// stop further handling and default handling by the browser
event.stopPropagation();
event.preventDefault();
var x = rwt.event.MouseEvent.getPageX();
var y = rwt.event.MouseEvent.getPageY();
self.sendMenuDetected( event.getTarget(), x, y );
}
},
menuDetectedByMouse : function( event ) {
if( event.getButton() === rwt.event.MouseEvent.C_BUTTON_RIGHT ) {
// stop further handling and default handling by the browser
event.stopPropagation();
event.preventDefault();
var x = event.getPageX();
var y = event.getPageY();
self.sendMenuDetected( event.getTarget(), x, y );
}
},
sendMenuDetected : function( widget, x, y ) {
if( !self.getSuspended() ) {
// send menu detect request to server
var widgetManager = rwt.remote.WidgetManager.getInstance();
// find parent control for the widget that received the event in case
// it wasn't the control itself that received the event
while( widget != null && !widgetManager.isControl( widget ) ) {
widget = widget.getParent ? widget.getParent() : null;
}
var id = widgetManager.findIdByWidget( widget );
if( id != null ) {
var remoteObject = rwt.remote.Connection.getInstance().getRemoteObject( widget );
remoteObject.notify( "MenuDetect", { "x" : x, "y" : y } );
}
}
}
};
self = rwt.remote.EventUtil;
}() );
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