From eb45f514fca74b97f0c841cb674a1222343df2d7 Mon Sep 17 00:00:00 2001
From: Alexander Ebert <ebert@woltlab.com>
Date: Tue, 28 Jun 2016 23:37:07 +0200
Subject: [PATCH] Open interactive dropdowns by hovering

---
 wcfsetup/install/files/js/WCF.User.js | 25 +++++++++++++++++++++++--
 wcfsetup/install/files/js/WCF.js      |  9 +++++++++
 2 files changed, 32 insertions(+), 2 deletions(-)

diff --git a/wcfsetup/install/files/js/WCF.User.js b/wcfsetup/install/files/js/WCF.User.js
index ccf0ae4bdc..fb424d7cd9 100644
--- a/wcfsetup/install/files/js/WCF.User.js
+++ b/wcfsetup/install/files/js/WCF.User.js
@@ -183,6 +183,22 @@ WCF.User.Panel.Abstract = Class.extend({
 		});
 		
 		this._triggerElement.click($.proxy(this.toggle, this));
+		
+		var timer = null;
+		this._triggerElement.hover(
+			(function() {
+				if (this._dropdown === null || !this._dropdown.isOpen()) {
+					timer = window.setTimeout((function() {
+						this.toggle(undefined, true);
+					}).bind(this), 300); 
+				}
+			}).bind(this),
+			function() {
+				window.clearTimeout(timer);
+				timer = null;
+			}
+		);
+		
 		if (this._options.showAllLink) {
 			this._triggerElement.dblclick($.proxy(this._dblClick, this));
 		}
@@ -201,10 +217,11 @@ WCF.User.Panel.Abstract = Class.extend({
 	/**
 	 * Toggles the interactive dropdown.
 	 * 
-	 * @param	{Event=}		event
+	 * @param	{Event?}	event
+	 * @param       {boolean?}      openOnly
 	 * @return	{boolean}
 	 */
-	toggle: function(event) {
+	toggle: function(event, openOnly) {
 		if (event instanceof Event) {
 			event.preventDefault();
 		}
@@ -213,6 +230,10 @@ WCF.User.Panel.Abstract = Class.extend({
 			this._dropdown = this._initDropdown();
 		}
 		
+		if (openOnly === true && this._dropdown.isOpen()) {
+			return false;
+		}
+		
 		if (this._dropdown.toggle()) {
 			if (!this._loadData) {
 				// check if there are outstanding items but there are no outstanding ones in the current list
diff --git a/wcfsetup/install/files/js/WCF.js b/wcfsetup/install/files/js/WCF.js
index 06d40f7f46..c60a458e65 100755
--- a/wcfsetup/install/files/js/WCF.js
+++ b/wcfsetup/install/files/js/WCF.js
@@ -1196,6 +1196,15 @@ WCF.Dropdown.Interactive.Instance = Class.extend({
 		this._container.removeClass('open');
 	},
 	
+	/**
+	 * Returns true if dropdown instance is visible.
+	 * 
+	 * @returns     {boolean}
+	 */
+	isOpen: function() {
+		return this._triggerElement.hasClass('open');
+	},
+	
 	/**
 	 * Toggles the dropdown state, returns true if dropdown is open afterwards, else false.
 	 * 
-- 
2.20.1