From a7e92960a3f4d31cfb2fbe2e3ba4941cf3b8faf2 Mon Sep 17 00:00:00 2001
From: Thibaut Girka <thib@sitedethib.com>
Date: Sun, 8 Apr 2018 20:35:54 +0200
Subject: Allow switching conversations when dragging and dropping

---
 .../conversation_selector.vala                     | 27 ++++++++++++++++++++++
 1 file changed, 27 insertions(+)

(limited to 'main/src/ui')

diff --git a/main/src/ui/conversation_selector/conversation_selector.vala b/main/src/ui/conversation_selector/conversation_selector.vala
index 9276148b..ac087183 100644
--- a/main/src/ui/conversation_selector/conversation_selector.vala
+++ b/main/src/ui/conversation_selector/conversation_selector.vala
@@ -11,6 +11,7 @@ public class ConversationSelector : ListBox {
     public signal void conversation_selected(Conversation conversation);
 
     private StreamInteractor stream_interactor;
+    private uint? drag_timeout;
     private HashMap<Conversation, ConversationSelectorRow> rows = new HashMap<Conversation, ConversationSelectorRow>(Conversation.hash_func, Conversation.equals_func);
 
     public ConversationSelector init(StreamInteractor stream_interactor) {
@@ -72,10 +73,36 @@ public class ConversationSelector : ListBox {
             rows[conversation] = row;
             add(row);
             row.main_revealer.set_reveal_child(true);
+            drag_dest_set(row, DestDefaults.MOTION, null, Gdk.DragAction.COPY);
+            drag_dest_set_track_motion(row, true);
+            row.drag_motion.connect(this.on_drag_motion);
+            row.drag_leave.connect(this.on_drag_leave);
         }
         invalidate_sort();
     }
 
+    public bool on_drag_motion(Widget widget, Gdk.DragContext context,
+                               int x, int y, uint time) {
+        if (this.drag_timeout != null)
+            return false;
+        this.drag_timeout = Timeout.add(200, () => {
+            if (widget.get_type().is_a(typeof(ConversationRow))) {
+                ConversationRow row = widget as ConversationRow;
+                conversation_selected(row.conversation);
+            }
+            this.drag_timeout = null;
+            return false;
+        });
+        return false;
+    }
+
+    public void on_drag_leave(Widget widget, Gdk.DragContext context, uint time) {
+        if (this.drag_timeout != null) {
+            Source.remove(this.drag_timeout);
+            this.drag_timeout = null;
+        }
+    }
+
     private void select_fallback_conversation(Conversation conversation) {
         if (get_selected_row() == rows[conversation]) {
             int index = rows[conversation].get_index();
-- 
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