From 56db897c005640f384bda6db70e1518eb5b80e66 Mon Sep 17 00:00:00 2001
From: Ellpeck <me@ellpeck.de>
Date: Sat, 5 Dec 2020 16:42:21 +0100
Subject: [PATCH] allow tooltips to appear later

---
 MLEM.Ui/Elements/Tooltip.cs | 22 +++++++++++++++++++++-
 MLEM.Ui/Style/UiStyle.cs    |  5 +++++
 2 files changed, 26 insertions(+), 1 deletion(-)

diff --git a/MLEM.Ui/Elements/Tooltip.cs b/MLEM.Ui/Elements/Tooltip.cs
index 928d4d7..b56868a 100644
--- a/MLEM.Ui/Elements/Tooltip.cs
+++ b/MLEM.Ui/Elements/Tooltip.cs
@@ -16,10 +16,16 @@ namespace MLEM.Ui.Elements {
         /// </summary>
         public StyleProp<Vector2> MouseOffset;
         /// <summary>
+        /// The amount of time that the mouse has to be over an element before it appears
+        /// </summary>
+        public StyleProp<TimeSpan> Delay;
+        /// <summary>
         /// The paragraph of text that this tooltip displays
         /// </summary>
         public Paragraph Paragraph;
 
+        private TimeSpan delayCountdown;
+
         /// <summary>
         /// Creates a new tooltip with the given settings
         /// </summary>
@@ -43,9 +49,16 @@ namespace MLEM.Ui.Elements {
                     if (this.Children.All(c => c.IsHidden))
                         return;
                     element.System.Add(element.GetType().Name + "Tooltip", this);
-                    this.SnapPositionToMouse();
+                    if (this.Delay <= TimeSpan.Zero) {
+                        this.IsHidden = false;
+                        this.SnapPositionToMouse();
+                    } else {
+                        this.IsHidden = true;
+                        this.delayCountdown = this.Delay;
+                    }
                 };
                 elementToHover.OnMouseExit += element => {
+                    this.delayCountdown = TimeSpan.Zero;
                     if (this.System != null)
                         this.System.Remove(this.Root.Name);
                 };
@@ -56,6 +69,12 @@ namespace MLEM.Ui.Elements {
         public override void Update(GameTime time) {
             base.Update(time);
             this.SnapPositionToMouse();
+
+            if (this.IsHidden && this.delayCountdown > TimeSpan.Zero) {
+                this.delayCountdown -= time.ElapsedGameTime;
+                if (this.delayCountdown <= TimeSpan.Zero)
+                    this.IsHidden = false;
+            }
         }
 
         /// <inheritdoc />
@@ -70,6 +89,7 @@ namespace MLEM.Ui.Elements {
             base.InitStyle(style);
             this.Texture.SetFromStyle(style.TooltipBackground);
             this.MouseOffset.SetFromStyle(style.TooltipOffset);
+            this.Delay.SetFromStyle(style.TooltipDelay);
             // we can't set from style here since it's a different element
             this.Paragraph?.TextColor.Set(style.TooltipTextColor);
         }
diff --git a/MLEM.Ui/Style/UiStyle.cs b/MLEM.Ui/Style/UiStyle.cs
index 601ad89..6585b8f 100644
--- a/MLEM.Ui/Style/UiStyle.cs
+++ b/MLEM.Ui/Style/UiStyle.cs
@@ -1,3 +1,4 @@
+using System;
 using Microsoft.Xna.Framework;
 using Microsoft.Xna.Framework.Audio;
 using MLEM.Font;
@@ -108,6 +109,10 @@ namespace MLEM.Ui.Style {
         /// </summary>
         public Color TooltipTextColor = Color.White;
         /// <summary>
+        /// The amount of time that the mouse has to be over an element with a <see cref="Tooltip"/> for the tooltip to appear
+        /// </summary>
+        public TimeSpan TooltipDelay = TimeSpan.Zero;
+        /// <summary>
         /// The texture that the <see cref="ProgressBar"/> element uses for its background
         /// </summary>
         public NinePatch ProgressBarTexture;