[gtk/listview-dnd: 14/15] editablelabel: Allow to drag text

[Matthias Clasen <matthiasc src gnome org>]

commit 8511f25b97e0843870234ef4d6d834a49c8a9a34
Author: Matthias Clasen <mclasen redhat com>
Date:   Fri Jun 19 15:24:24 2020 -0400

    editablelabel: Allow to drag text
    
    If we allow editing, we should allow direct drags too.

 gtk/gtkeditablelabel.c | 21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)
---
diff --git a/gtk/gtkeditablelabel.c b/gtk/gtkeditablelabel.c
index ad36867a22..7914f9bca7 100644
--- a/gtk/gtkeditablelabel.c
+++ b/gtk/gtkeditablelabel.c
@@ -17,6 +17,7 @@
 
 #include "config.h"
 
+#include "gtkdragsource.h"
 #include "gtkdroptarget.h"
 #include "gtkeditablelabel.h"
 #include "gtkeditable.h"
@@ -163,11 +164,25 @@ gtk_editable_label_drag_drop (GtkDropTarget    *dest,
   return TRUE;
 }
 
+static GdkContentProvider *
+gtk_editable_label_prepare_drag (GtkDragSource    *source,
+                                 double            x,
+                                 double            y,
+                                 GtkEditableLabel *self)
+{
+  if (!gtk_editable_get_editable (GTK_EDITABLE (self)))
+    return NULL;
+
+  return gdk_content_provider_new_typed (G_TYPE_STRING,
+                                         gtk_label_get_label (GTK_LABEL (self->label)));
+}
+
 static void
 gtk_editable_label_init (GtkEditableLabel *self)
 {
   GtkGesture *gesture;
   GtkDropTarget *target;
+  GtkDragSource *source;
 
   gtk_widget_set_focusable (GTK_WIDGET (self), TRUE);
 
@@ -182,7 +197,7 @@ gtk_editable_label_init (GtkEditableLabel *self)
   gtk_widget_set_parent (self->stack, GTK_WIDGET (self));
 
   gesture = gtk_gesture_click_new ();
-  g_signal_connect_swapped (gesture, "pressed", G_CALLBACK (clicked_cb), self);
+  g_signal_connect_swapped (gesture, "released", G_CALLBACK (clicked_cb), self);
   gtk_widget_add_controller (self->label, GTK_EVENT_CONTROLLER (gesture));
 
   g_signal_connect_swapped (self->entry, "activate", G_CALLBACK (activate_cb), self);
@@ -193,6 +208,10 @@ gtk_editable_label_init (GtkEditableLabel *self)
   g_signal_connect (target, "drop", G_CALLBACK (gtk_editable_label_drag_drop), self);
   gtk_widget_add_controller (self->label, GTK_EVENT_CONTROLLER (target));
 
+  source = gtk_drag_source_new ();
+  g_signal_connect (source, "prepare", G_CALLBACK (gtk_editable_label_prepare_drag), self);
+  gtk_widget_add_controller (self->label, GTK_EVENT_CONTROLLER (source));
+
   gtk_editable_init_delegate (GTK_EDITABLE (self));
 }