From 34a68751e15ca67b8c802163baf4a4d4deeae68a Mon Sep 17 00:00:00 2001
From: tildearrow <tildearrow@protonmail.com>
Date: Tue, 1 Feb 2022 03:09:53 -0500
Subject: [PATCH] GUI: add ability to open files by drag-and-drop

---
 src/gui/gui.cpp | 19 +++++++++++++++++++
 src/gui/gui.h   |  3 ++-
 2 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/src/gui/gui.cpp b/src/gui/gui.cpp
index 5cea0c197..bab3b2a28 100644
--- a/src/gui/gui.cpp
+++ b/src/gui/gui.cpp
@@ -4663,6 +4663,19 @@ bool FurnaceGUI::loop() {
             }
           }
           break;
+        case SDL_DROPFILE:
+          if (ev.drop.file!=NULL) {
+            if (modified) {
+              nextFile=ev.drop.file;
+              showWarning("Unsaved changes! Are you sure?",GUI_WARN_OPEN_DROP);
+            } else {
+              if (load(ev.drop.file)>0) {
+                showError(fmt::sprintf("Error while loading file! (%s)",lastError));
+              }
+            }
+            SDL_free(ev.drop.file);
+          }
+          break;
         case SDL_QUIT:
           if (modified) {
             showWarning("Unsaved changes! Are you sure you want to quit?",GUI_WARN_QUIT);
@@ -5251,6 +5264,12 @@ bool FurnaceGUI::loop() {
           case GUI_WARN_OPEN:
             openFileDialog(GUI_FILE_OPEN);
             break;
+          case GUI_WARN_OPEN_DROP:
+            if (load(nextFile)>0) {
+              showError(fmt::sprintf("Error while loading file! (%s)",lastError));
+            }
+            nextFile="";
+            break;
           case GUI_WARN_GENERIC:
             break;
         }
diff --git a/src/gui/gui.h b/src/gui/gui.h
index 245f2f557..4e2c4aa98 100644
--- a/src/gui/gui.h
+++ b/src/gui/gui.h
@@ -107,6 +107,7 @@ enum FurnaceGUIWarnings {
   GUI_WARN_QUIT,
   GUI_WARN_NEW,
   GUI_WARN_OPEN,
+  GUI_WARN_OPEN_DROP,
   GUI_WARN_GENERIC
 };
 
@@ -166,7 +167,7 @@ class FurnaceGUI {
   SDL_Window* sdlWin;
   SDL_Renderer* sdlRend;
 
-  String workingDir, fileName, clipboard, warnString, errorString, lastError, curFileName;
+  String workingDir, fileName, clipboard, warnString, errorString, lastError, curFileName, nextFile;
   String mmlString[12];
   String mmlStringW;