2021-07-16 16:41:58 +02:00
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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2021-10-03 02:10:21 +02:00
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2021-07-16 16:41:58 +02:00
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<head>
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<script type="text/javascript">
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web2d = {
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peer: {}
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};
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web2d.peer =
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{
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svg: {}
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};
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web2d.peer.utils = {};
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</script>
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<style type="text/css">
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.eventForm {
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float: left;
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margin: 10px;
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}
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</style>
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<script type="text/javascript">
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function EventLogger(type, element) {
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this._enable = false;
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this._element = element;
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this._type = type;
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this._listener = function logger(event) {
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var oldColor = element.getAttribute('fillColor');
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element.setFill("yellow");
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alert("Event on:" + element.getType() + ", Type:" + type);
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element.setFill(oldColor);
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2021-07-16 16:41:58 +02:00
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};
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}
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EventLogger.prototype.changeState = function () {
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this._enable = !this._enable;
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if (this._enable) {
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this._element.addEvent(this._type, this._listener);
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} else {
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this._element.removeEvent(this._type, this._listener);
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}
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return this._enable;
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};
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function MultipleEventHandler(type, element) {
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this._listeners = [];
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this._type = type;
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this._element = element;
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}
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MultipleEventHandler.prototype.registerOneListener = function () {
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var count = this._listeners.length;
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var listener = function (event) {
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alert("Listener #:" + count);
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};
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this._listeners.push(listener);
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this._element.addEvent(this._type, listener);
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}
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MultipleEventHandler.prototype.listenerCount = function () {
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return this._listeners.length;
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2021-07-16 16:41:58 +02:00
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}
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MultipleEventHandler.prototype.unRegisterOneListener = function () {
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if (this._listeners.length > 0) {
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var listener = this._listeners.pop();
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this._element.removeEvent(this._type, listener);
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}
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}
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function initialize() {
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web2d.Toolkit.init();
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// Workspace with CoordOrigin(100,100);
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var workspace = new web2d.Workspace();
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workspace.setSize("150px", "150px");
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workspace.setCoordSize(150, 150);
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var bigElipse = new web2d.Elipse();
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bigElipse.setSize(100, 100);
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bigElipse.setPosition(75, 75);
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workspace.append(bigElipse);
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var smallElipse = new web2d.Elipse();
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smallElipse.setSize(50, 50);
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smallElipse.setPosition(75, 75);
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smallElipse.setFill('red')
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workspace.append(smallElipse);
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wClickEventLogger = new EventLogger('click', workspace);
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wMouseoverEventLogger = new EventLogger('mouseover', workspace);
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wMouseoutEventLogger = new EventLogger('mouseout', workspace);
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wMousemoveEventLogger = new EventLogger('mousemove', workspace);
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wDblCickEventLogger = new EventLogger('dblclick', workspace);
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esClickEventLogger = new EventLogger('click', smallElipse);
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esMouseoverEventLogger = new EventLogger('mouseover', smallElipse);
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esMouseoutEventLogger = new EventLogger('mouseout', smallElipse);
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esMousemoveEventLogger = new EventLogger('mousemove', smallElipse);
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esDblCickEventLogger = new EventLogger('dblclick', smallElipse);
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ebClickEventLogger = new EventLogger('click', bigElipse);
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ebMouseoverEventLogger = new EventLogger('mouseover', bigElipse);
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ebMouseoutEventLogger = new EventLogger('mouseout', bigElipse);
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ebousemoveEventLogger = new EventLogger('mousemove', bigElipse);
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ebblCickEventLogger = new EventLogger('dblclick', bigElipse);
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workspace.addItAsChildTo($('#workspaceContainer').first());
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var mEventWorkspace = new web2d.Workspace();
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mEventWorkspace.setSize("150px", "150px");
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mEventWorkspace.setCoordSize(150, 150);
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var elipse = new web2d.Elipse();
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elipse.setSize(100, 100);
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elipse.setPosition(75, 75);
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elipse.setFill('blue')
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mEventWorkspace.append(elipse);
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mEventWorkspace.addItAsChildTo($('#workspaceMultipleEvents').first());
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multipleHandler = new MultipleEventHandler('click', elipse);
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}
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</script>
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</head>
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<body onload="initialize();">
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2021-10-03 02:10:21 +02:00
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<script type="text/javascript">
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2021-07-16 16:41:58 +02:00
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// Logger.setEnabled(true);
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2021-10-03 02:10:21 +02:00
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</script>
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<h1>Elements Event Handling</h1>
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<table border="1">
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<colgroup style="width:80%;">
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<col style="width:30%" />
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<col style="width:60%" />
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</colgroup>
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<tbody>
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<tr>
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<td>
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This examples shows the ability to attach listeners to handle several events.
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In this example, you can attach different events to three elements: workspace, small elipse and the
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big
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elipse.
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Events will follow the event bubbling behaviour.
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</td>
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<td>
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<div id="workspaceContainer" style="float:left;"></div>
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<div class="eventForm">
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<form action="">
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<fieldset>
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<legend>Workspace Events</legend>
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<label>Click Event:
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<input type="button" value="Register"
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onclick="(!wClickEventLogger.changeState())?this.value='Register':this.value='Unregister'" />
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</label><br />
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<label>Double Click Event:
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<input type="button" value="Register"
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onclick="(!wDblCickEventLogger.changeState())?this.value='Register':this.value='Unregister'" />
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</label><br />
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<label>Mouse Over Event:
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<input type="button" value="Register"
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onclick="(!wMouseoverEventLogger.changeState())?this.value='Register':this.value='Unregister'" />
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</label><br />
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<label>Mouse Out Event:
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<input type="button" value="Register"
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onclick="(!wMouseoutEventLogger.changeState())?this.value='Register':this.value='Unregister'" />
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</label><br />
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<label>Mouse Move Event:
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<input type="button" value="Register"
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onclick="(!wMousemoveEventLogger.changeState())?this.value='Register':this.value='Unregister'" />
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</label>
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</fieldset>
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</form>
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<form action="">
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<fieldset>
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<legend>Small Elipse Events</legend>
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<label>Click Event:
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<input type="button" value="Register"
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onclick="(!esClickEventLogger.changeState())?this.value='Register':this.value='Unregister'" />
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</label><br />
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<label>Double Click Event:
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<input type="button" value="Register"
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onclick="(!esDblCickEventLogger.changeState())?this.value='Register':this.value='Unregister'" />
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</label><br />
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<label>Mouse Over Event:
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<input type="button" value="Register"
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onclick="(!esMouseoverEventLogger.changeState())?this.value='Register':this.value='Unregister'" />
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</label><br />
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<label>Mouse Out Event:
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<input type="button" value="Register"
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onclick="(!esMouseoutEventLogger.changeState())?this.value='Register':this.value='Unregister'" />
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</label><br />
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<label>Mouse Move Event:
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<input type="button" value="Register"
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onclick="(!esMousemoveEventLogger.changeState())?this.value='Register':this.value='Unregister'" />
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</label>
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</fieldset>
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</form>
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<form action="">
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<fieldset>
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<legend>Big Elipse Events</legend>
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<label>Click Event:
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<input type="button" value="Register"
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onclick="(!ebClickEventLogger.changeState())?this.value='Register':this.value='Unregister'" />
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</label><br />
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<label>Double Click Event:
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<input type="button" value="Register"
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onclick="(!ebDblCickEventLogger.changeState())?this.value='Register':this.value='Unregister'" />
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</label><br />
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<label>Mouse Over Event:
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<input type="button" value="Register"
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onclick="(!ebMouseoverEventLogger.changeState())?this.value='Register':this.value='Unregister'" />
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</label><br />
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<label>Mouse Out Event:
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<input type="button" value="Register"
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onclick="(!ebMouseoutEventLogger.changeState())?this.value='Register':this.value='Unregister'" />
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</label><br />
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<label>Mouse Move Event:
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<input type="button" value="Register"
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onclick="(!ebMousemoveEventLogger.changeState())?this.value='Register':this.value='Unregister'" />
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</label>
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</fieldset>
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</form>
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</div>
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</td>
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</tr>
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<tr>
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<td>Multiple listeners can be attached to an element to handle an event type.
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In this example, multiple listeners can be registered to the elipse element to handle the click
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event type.
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</td>
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<td>
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<div id="workspaceMultipleEvents" style="float:left;"></div>
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<div class="eventForm">
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<form action="">
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<fieldset>
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<legend>Elipse Click Events Listeners</legend>
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<label>Registered Listeners #:
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<input type="text" disabled="disabled" value="0" id="listenerCounter" maxlength="2"
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size="2" />
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</label>
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<br />
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<input type="button" value="Register Listener"
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onclick="multipleHandler.registerOneListener();$('#listenerCounter').first().value=multipleHandler.listenerCount();" />
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<input type="button" value="UnRegister Listener"
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onclick="multipleHandler.unRegisterOneListener();$('#listenerCounter').first().value=multipleHandler.listenerCount();" />
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</fieldset>
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</form>
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</div>
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</td>
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</tr>
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</tbody>
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</table>
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2021-07-16 16:41:58 +02:00
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</body>
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2021-10-03 02:10:21 +02:00
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</html>
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