https://wiki.multitheftauto.com/wiki/Event_system?feed=atom&action=historyEvent system - Revision history2024-03-28T16:34:10ZRevision history for this page on the wikiMediaWiki 1.39.3https://wiki.multitheftauto.com/index.php?title=Event_system&diff=62258&oldid=prevLordHenry: /* Built in events */2019-02-19T01:27:47Z<p><span dir="auto"><span class="autocomment">Built in events</span></span></p>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Built in events==</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Built in events==</div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>MTA has a number of built in events. These are listed on the pages [[Client Scripting Events]] and [[Scripting Events]].</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>MTA has a number of built in events. These are listed on the pages [[Client Scripting Events]] and [[<ins style="font-weight: bold; text-decoration: none;">Server </ins>Scripting Events]].</div></td></tr>
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</table>LordHenryhttps://wiki.multitheftauto.com/index.php?title=Event_system&diff=59890&oldid=prevSurge at 18:38, 14 October 20182018-10-14T18:38:13Z<p></p>
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</table>Surgehttps://wiki.multitheftauto.com/index.php?title=Event_system&diff=53052&oldid=prevReitside at 14:03, 4 December 20172017-12-04T14:03:21Z<p></p>
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</table>Reitsidehttps://wiki.multitheftauto.com/index.php?title=Event_system&diff=52454&oldid=prevStanleySathler at 03:49, 28 September 20172017-09-28T03:49:01Z<p></p>
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</table>StanleySathlerhttps://wiki.multitheftauto.com/index.php?title=Event_system&diff=35010&oldid=prevMaccer: Documented the hidden 'client' variable2013-02-24T00:06:42Z<p>Documented the hidden 'client' variable</p>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>To use the event system, you attach event handlers to elements in the element tree using [[addEventHandler]]. When you do this, your function will get triggered for all the events triggered on that element, it's parents (and their parents, etc.) and it's children (and their children). As such, an event handler attached to the ''root'' element will be triggered when an event occurs for any element. As a consequence you should generally use as specific a handler as you can. If you wish to just see when the player enters a specific marker, just attach the event handler to that marker.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>To use the event system, you attach event handlers to elements in the element tree using [[addEventHandler]]. When you do this, your function will get triggered for all the events triggered on that element, it's parents (and their parents, etc.) and it's children (and their children). As such, an event handler attached to the ''root'' element will be triggered when an event occurs for any element. As a consequence you should generally use as specific a handler as you can. If you wish to just see when the player enters a specific marker, just attach the event handler to that marker.</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>Each event handler has <del style="font-weight: bold; text-decoration: none;">two </del>'hidden' variables:</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>Each event handler has <ins style="font-weight: bold; text-decoration: none;">three </ins>'hidden' variables:</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* '''source''': This is the element that the event originated from.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* '''source''': This is the element that the event originated from.</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* '''this''': This is the element that the handler is being triggered on (i.e. the one you attached it to with addEventHandler).</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* '''this''': This is the element that the handler is being triggered on (i.e. the one you attached it to with addEventHandler).</div></td></tr>
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<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">Additionally, the server-side event system also has one more 'hidden' variable:</ins></div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">* '''client''': This is the client that triggered the event using triggerServerEvent. This is not set if the event was not triggered from a client. </ins></div></td></tr>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The ''source'' variable is the most important one for most handlers. You almost always will want to reference this variable to tell what element triggered the event. The ''this'' variable has some uses for ensuring that an event was emitted by the element that you attached the handler to.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The ''source'' variable is the most important one for most handlers. You almost always will want to reference this variable to tell what element triggered the event. The ''this'' variable has some uses for ensuring that an event was emitted by the element that you attached the handler to.</div></td></tr>
</table>Maccerhttps://wiki.multitheftauto.com/index.php?title=Event_system&diff=30686&oldid=prevKzman at 02:57, 14 May 20122012-05-14T02:57:36Z<p></p>
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</table>Kzmanhttps://wiki.multitheftauto.com/index.php?title=Event_system&diff=28330&oldid=prevOpenIDUser32 at 06:06, 22 November 20112011-11-22T06:06:01Z<p></p>
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</table>OpenIDUser32https://wiki.multitheftauto.com/index.php?title=Event_system&diff=20960&oldid=prev50p: /* added info about parameters being passed to a function attached to the event */2009-08-03T23:04:52Z<p><span dir="auto"><span class="autocomment">added info about parameters being passed to a function attached to the event</span></span></p>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Event handlers==</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Event handlers==</div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>To use the event system, you attach event handlers to elements in the element tree using addEventHandler. When you do this, your function will get triggered for all the events triggered on that element, it's parents (and their parents, etc.) and it's children (and their children). As such, an event handler attached to the ''root'' element will be triggered when an event occurs for any element. As a consequence you should generally use as specific a handler as you can. If you wish to just see when the player enters a specific marker, just attach the event handler to that marker.</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>To use the event system, you attach event handlers to elements in the element tree using <ins style="font-weight: bold; text-decoration: none;">[[</ins>addEventHandler<ins style="font-weight: bold; text-decoration: none;">]]</ins>. When you do this, your function will get triggered for all the events triggered on that element, it's parents (and their parents, etc.) and it's children (and their children). As such, an event handler attached to the ''root'' element will be triggered when an event occurs for any element. As a consequence you should generally use as specific a handler as you can. If you wish to just see when the player enters a specific marker, just attach the event handler to that marker.</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Each event handler has two 'hidden' variables:</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Each event handler has two 'hidden' variables:</div></td></tr>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* You can create 'dummy' elements to catch events from a group of child elements</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* You can create 'dummy' elements to catch events from a group of child elements</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* You can use dummy elements specified in a .map file (e.g. <flag>) and create 'real' representations for them (e.g. objects) and make these real elements children of the dummy element. Event handlers can then be attached to the dummy element and it will receive all the events of the real elements. This is useful for when one resource manages the representation of the element (creating the objects, for example), while another wants to handle special events. This could be a map resource that wants to handle a flag being captured in a specific way - the map resource would (generally) not be aware of the way the flag is represented. This doesn't matter as it can just attach handlers to it's dummy flag element while the other gamemode resource can handle the representation.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* You can use dummy elements specified in a .map file (e.g. <flag>) and create 'real' representations for them (e.g. objects) and make these real elements children of the dummy element. Event handlers can then be attached to the dummy element and it will receive all the events of the real elements. This is useful for when one resource manages the representation of the element (creating the objects, for example), while another wants to handle special events. This could be a map resource that wants to handle a flag being captured in a specific way - the map resource would (generally) not be aware of the way the flag is represented. This doesn't matter as it can just attach handlers to it's dummy flag element while the other gamemode resource can handle the representation.</div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">The function you attached to an event gets called and passed a bunch of arguments. These arguments are event-specific. Each event has specific parameters, for instance [[onClientGUIClick]] has 4 parameters, which are:</ins></div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"><syntaxhighlight lang="lua">string button, string state, int absoluteX, int absoluteY</syntaxhighlight></ins></div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">The function you attached to this event will be passed these parameters as arguments. You must remember that each event has different parameters.</ins></div></td></tr>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Built in events==</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Built in events==</div></td></tr>
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</table>50phttps://wiki.multitheftauto.com/index.php?title=Event_system&diff=17442&oldid=prevEAi at 23:40, 14 June 20082008-06-14T23:40:30Z<p></p>
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<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">__NOTOC__</ins></div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The event system is at the core of MTA scripting. Events work closely in conjunction with the element tree. Events are triggered when something happens - a player enters a marker, an element is clicked on etc. Each event has a source element, this is the element that performed the action.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The event system is at the core of MTA scripting. Events work closely in conjunction with the element tree. Events are triggered when something happens - a player enters a marker, an element is clicked on etc. Each event has a source element, this is the element that performed the action.</div></td></tr>
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</table>EAihttps://wiki.multitheftauto.com/index.php?title=Event_system&diff=17441&oldid=prevEAi: /* Event handlers */2008-06-14T23:39:55Z<p><span dir="auto"><span class="autocomment">Event handlers</span></span></p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 23:39, 14 June 2008</td>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* All events anywhere in the element tree will be triggered on the root element. This means you can easily catch every event of a type by attaching a handler to the root element. Only do this if you genuinely want every event of that type, otherwise attach it somewhere more specific in the element tree.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* All events anywhere in the element tree will be triggered on the root element. This means you can easily catch every event of a type by attaching a handler to the root element. Only do this if you genuinely want every event of that type, otherwise attach it somewhere more specific in the element tree.</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* You can attach an event handler to your resource's root element to get all the events triggered by elements your resource contains.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* You can attach an event handler to your resource's root element to get all the events triggered by elements your resource contains.</div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">* You can create 'dummy' elements to catch events from a group of child elements</ins></div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">* You can use dummy elements specified in a .map file (e.g. <flag>) and create 'real' representations for them (e.g. objects) and make these real elements children of the dummy element. Event handlers can then be attached to the dummy element and it will receive all the events of the real elements. This is useful for when one resource manages the representation of the element (creating the objects, for example), while another wants to handle special events. This could be a map resource that wants to handle a flag being captured in a specific way - the map resource would (generally) not be aware of the way the flag is represented. This doesn't matter as it can just attach handlers to it's dummy flag element while the other gamemode resource can handle the representation.</ins></div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Built in events==</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Built in events==</div></td></tr>
</table>EAi