From e4e8e6bb23a734634da1f3f19a03c247adcfe476 Mon Sep 17 00:00:00 2001
From: Alexander Kojevnikov <alexander@kojevnikov.com>
Date: Wed, 19 May 2010 19:25:48 +1000
Subject: [PATCH] DnD support (issue 4)

---
 src/spek-window.vala | 23 +++++++++++++++++++++++
 vapi/config.vapi     |  6 ++++++
 2 files changed, 29 insertions(+)

diff --git a/src/spek-window.vala b/src/spek-window.vala
index 496291d..a1be294 100644
--- a/src/spek-window.vala
+++ b/src/spek-window.vala
@@ -27,6 +27,9 @@ namespace Spek {
 		private FileFilter filter_all;
 		private FileFilter filter_audio;
 		private FileFilter filter_png;
+		private const Gtk.TargetEntry[] DEST_TARGET_ENTRIES = {
+			{ "text/uri-list", 0, 0 }
+		};
 
 		public Window (string? file_name) {
 			title = _("Spek - Acoustic Spectrum Analyser");
@@ -96,11 +99,31 @@ namespace Spek {
 			add (vbox);
 			show_all ();
 
+			// Set up Drag and Drop
+			drag_dest_set (this, DestDefaults.ALL, DEST_TARGET_ENTRIES, DragAction.COPY);
+			drag_data_received.connect (on_dropped);
+
 			if (file_name != null) {
 				open_file (file_name);
 			}
 		}
 
+		void on_dropped (DragContext cx, int x, int y, SelectionData data, uint info, uint time) {
+			if (data.length > 0 && data.format == 8) {
+				string[] files = data.get_uris ();
+				if (files.length > 0) {
+					try {
+						string hostname;
+						var file = filename_from_uri (files[0], out hostname);
+						open_file (file);
+						drag_finish (cx, true, false, time);
+						return;
+					} catch {}
+				}
+			}
+			drag_finish (cx, false, false, time);
+		}
+
 		private void open_file (string file_name) {
 			cur_dir = Path.get_dirname (file_name);
 			spectrogram.open (file_name);
diff --git a/vapi/config.vapi b/vapi/config.vapi
index 7cc4968..d3dc5f8 100644
--- a/vapi/config.vapi
+++ b/vapi/config.vapi
@@ -14,3 +14,9 @@ namespace Config {
 	public const string PKGDATADIR; /* /usr/local/share/spek */
 	public const string PKGLIBDIR;  /* /usr/local/lib/spek   */
 }
+
+// TODO: file a bug to have this included
+[CCode (cprefix = "G", lower_case_cprefix = "g_", cheader_filename = "glib.h", gir_namespace = "GLib", gir_version = "2.0")]
+namespace GLib {
+	public static string filename_from_uri (string uri, out string hostname) throws Error;
+}