From 2b625e9c53fcb9223e7344601a593dadd6a123b8 Mon Sep 17 00:00:00 2001
From: adelikat <adelikat@tasvideos.org>
Date: Thu, 4 May 2017 17:54:21 -0500
Subject: [PATCH] Advanced loader - if magic folder necessary for the feature
 to work doesn't exist, create it.  Allow drag and drop of dll files on the
 Current Core box

---
 BizHawk.Client.EmuHawk/MainForm.Events.cs     |  4 +++
 .../OpenAdvancedChooser.Designer.cs           |  3 ++
 BizHawk.Client.EmuHawk/OpenAdvancedChooser.cs | 28 +++++++++++++++++--
 3 files changed, 32 insertions(+), 3 deletions(-)

diff --git a/BizHawk.Client.EmuHawk/MainForm.Events.cs b/BizHawk.Client.EmuHawk/MainForm.Events.cs
index 7fa16390ed..c27cab28dc 100644
--- a/BizHawk.Client.EmuHawk/MainForm.Events.cs
+++ b/BizHawk.Client.EmuHawk/MainForm.Events.cs
@@ -1316,6 +1316,10 @@ namespace BizHawk.Client.EmuHawk
 			else
 			{
 				ofd.InitialDirectory = PathManager.GetPathType("Libretro", "Cores");
+				if (!Directory.Exists(ofd.InitialDirectory))
+				{
+					Directory.CreateDirectory(ofd.InitialDirectory);
+				}
 			}
 
 			ofd.RestoreDirectory = true;
diff --git a/BizHawk.Client.EmuHawk/OpenAdvancedChooser.Designer.cs b/BizHawk.Client.EmuHawk/OpenAdvancedChooser.Designer.cs
index 8a28b697c4..af6c2fcc75 100644
--- a/BizHawk.Client.EmuHawk/OpenAdvancedChooser.Designer.cs
+++ b/BizHawk.Client.EmuHawk/OpenAdvancedChooser.Designer.cs
@@ -97,11 +97,14 @@
             // 
             // txtLibretroCore
             // 
+            this.txtLibretroCore.AllowDrop = true;
             this.txtLibretroCore.Location = new System.Drawing.Point(81, 23);
             this.txtLibretroCore.Name = "txtLibretroCore";
             this.txtLibretroCore.ReadOnly = true;
             this.txtLibretroCore.Size = new System.Drawing.Size(314, 20);
             this.txtLibretroCore.TabIndex = 6;
+            this.txtLibretroCore.DragDrop += new System.Windows.Forms.DragEventHandler(this.txtLibretroCore_DragDrop);
+            this.txtLibretroCore.DragEnter += new System.Windows.Forms.DragEventHandler(this.txtLibretroCore_DragEnter);
             // 
             // btnLibretroLaunchGame
             // 
diff --git a/BizHawk.Client.EmuHawk/OpenAdvancedChooser.cs b/BizHawk.Client.EmuHawk/OpenAdvancedChooser.cs
index 6eb0d2790a..e6d1684bce 100644
--- a/BizHawk.Client.EmuHawk/OpenAdvancedChooser.cs
+++ b/BizHawk.Client.EmuHawk/OpenAdvancedChooser.cs
@@ -130,22 +130,44 @@ namespace BizHawk.Client.EmuHawk
 			SuggestedExtensionFilter = filter;
 
 			Result = Command.RetroLaunchGame;
-			DialogResult = System.Windows.Forms.DialogResult.OK;
+			DialogResult =  DialogResult.OK;
 			Close();
 		}
 
 		private void btnClassicLaunchGame_Click(object sender, EventArgs e)
 		{
 			Result = Command.ClassicLaunchGame;
-			DialogResult = System.Windows.Forms.DialogResult.OK;
+			DialogResult = DialogResult.OK;
 			Close();
 		}
 
 		private void btnLibretroLaunchNoGame_Click(object sender, EventArgs e)
 		{
 			Result = Command.RetroLaunchNoGame;
-			DialogResult = System.Windows.Forms.DialogResult.OK;
+			DialogResult = DialogResult.OK;
 			Close();
 		}
+
+		private void txtLibretroCore_DragEnter(object sender, DragEventArgs e)
+		{
+			if (e.Data.GetDataPresent(DataFormats.FileDrop))
+			{
+				var filePaths = (string[])e.Data.GetData(DataFormats.FileDrop);
+				if (Path.GetExtension(filePaths[0]).ToUpper() == ".DLL")
+				{
+					e.Effect = DragDropEffects.Copy;
+					return;
+				}
+			}
+
+			e.Effect = DragDropEffects.None;
+		}
+
+		private void txtLibretroCore_DragDrop(object sender, DragEventArgs e)
+		{
+			var filePaths = (string[])e.Data.GetData(DataFormats.FileDrop);
+			Global.Config.LibretroCore = filePaths[0];
+			RefreshLibretroCore(false);
+		}
 	}
 }