[gtk/editable-label: 1/2] Add a GtkEditableLabel widget

[Matthias Clasen <matthiasc src gnome org>]

commit 14eaede4e7931bcbdc3f6e71b86f2ed681c09bba
Author: Matthias Clasen <mclasen redhat com>
Date:   Fri Jun 12 11:07:07 2020 -0400

    Add a GtkEditableLabel widget

 gtk/gtk.h              |   1 +
 gtk/gtkeditablelabel.c | 212 +++++++++++++++++++++++++++++++++++++++++++++++++
 gtk/gtkeditablelabel.h |  45 +++++++++++
 gtk/meson.build        |   2 +
 4 files changed, 260 insertions(+)
---
diff --git a/gtk/gtk.h b/gtk/gtk.h
index ed9ee638cd..b7600866f9 100644
--- a/gtk/gtk.h
+++ b/gtk/gtk.h
@@ -100,6 +100,7 @@
 #include <gtk/gtkdroptargetasync.h>
 #include <gtk/gtkdropdown.h>
 #include <gtk/gtkeditable.h>
+#include <gtk/gtkeditablelabel.h>
 #include <gtk/gtkemojichooser.h>
 #include <gtk/gtkentry.h>
 #include <gtk/gtkentrybuffer.h>
diff --git a/gtk/gtkeditablelabel.c b/gtk/gtkeditablelabel.c
new file mode 100644
index 0000000000..e4ffb5cdbd
--- /dev/null
+++ b/gtk/gtkeditablelabel.c
@@ -0,0 +1,212 @@
+/* GTK - The GIMP Toolkit
+ * Copyright (C) 2020, Red Hat, Inc
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include "gtkeditablelabel.h"
+#include "gtklabel.h"
+#include "gtkstack.h"
+#include "gtkentry.h"
+#include "gtkbinlayout.h"
+#include "gtkgestureclick.h"
+#include "gtkprivate.h"
+#include "gtkintl.h"
+
+struct _GtkEditableLabel
+{
+  GtkWidget parent_instance;
+
+  GtkWidget *stack;
+  GtkWidget *label;
+  GtkWidget *entry;
+};
+
+struct _GtkEditableLabelClass
+{
+  GtkWidgetClass parent_class;
+};
+
+enum {
+  PROP_LABEL = 1,
+  NUM_PROPERTIES
+};
+
+static GParamSpec *properties[NUM_PROPERTIES] = { NULL, };
+
+G_DEFINE_TYPE (GtkEditableLabel, gtk_editable_label, GTK_TYPE_WIDGET)
+
+static void
+gtk_editable_label_stop_editing (GtkWidget  *widget,
+                                 const char *action_name,
+                                 GVariant   *parameters)
+{
+  GtkEditableLabel *self = GTK_EDITABLE_LABEL (widget);
+
+  gtk_stack_set_visible_child_name (GTK_STACK (self->stack), "label");
+  gtk_editable_set_text (GTK_EDITABLE (self->entry),
+                         gtk_label_get_label (GTK_LABEL (self->label)));
+}
+
+static void
+clicked_cb (GtkGestureClick  *gesture,
+            int               n_pressed,
+            double            x,
+            double            y,
+            GtkEditableLabel *self)
+{
+  gtk_stack_set_visible_child_name (GTK_STACK (self->stack), "entry");
+  gtk_widget_grab_focus (self->entry);
+}
+
+static void
+activate_cb (GtkEntry         *entry,
+             GtkEditableLabel *self)
+{
+  gtk_label_set_label (GTK_LABEL (self->label),
+                       gtk_editable_get_text (GTK_EDITABLE (entry)));
+  g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_LABEL]);
+  gtk_stack_set_visible_child_name (GTK_STACK (self->stack), "label");
+}
+
+static void
+gtk_editable_label_init (GtkEditableLabel *self)
+{
+  GtkGesture *gesture;
+
+  gtk_widget_set_focusable (GTK_WIDGET (self), TRUE);
+
+  self->stack = gtk_stack_new ();
+  self->label = gtk_label_new ("");
+  gtk_label_set_xalign (GTK_LABEL (self->label), 0.0);
+  self->entry = gtk_entry_new ();
+
+  gtk_stack_add_named (GTK_STACK (self->stack), self->label, "label");
+  gtk_stack_add_named (GTK_STACK (self->stack), self->entry, "entry");
+
+  gtk_widget_set_parent (self->stack, GTK_WIDGET (self));
+
+  gesture = gtk_gesture_click_new ();
+  g_signal_connect (gesture, "pressed", G_CALLBACK (clicked_cb), self);
+  gtk_widget_add_controller (self->label, GTK_EVENT_CONTROLLER (gesture));
+
+  g_signal_connect (self->entry, "activate", G_CALLBACK (activate_cb), self);
+}
+
+static void
+gtk_editable_label_set_property (GObject      *object,
+                                 guint         prop_id,
+                                 const GValue *value,
+                                 GParamSpec   *pspec)
+{
+  GtkEditableLabel *self = GTK_EDITABLE_LABEL (object);
+
+  switch (prop_id)
+    {
+    case PROP_LABEL:
+      gtk_editable_label_set_label (self, g_value_get_string (value));
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+    }
+}
+
+static void
+gtk_editable_label_get_property (GObject     *object,
+                                 guint        prop_id,
+                                 GValue      *value,
+                                 GParamSpec  *pspec)
+{
+  GtkEditableLabel *self = GTK_EDITABLE_LABEL (object);
+
+  switch (prop_id)
+    {
+    case PROP_LABEL:
+      g_value_set_string (value, gtk_editable_label_get_label (self));
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+    }
+}
+
+static void
+gtk_editable_label_dispose (GObject *object)
+{
+  GtkEditableLabel *self = GTK_EDITABLE_LABEL (object);
+
+  g_clear_pointer (&self->stack, gtk_widget_unparent);
+
+  G_OBJECT_CLASS (gtk_editable_label_parent_class)->dispose (object);
+}
+
+static void
+gtk_editable_label_class_init (GtkEditableLabelClass *class)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (class);
+  GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
+
+  object_class->set_property = gtk_editable_label_set_property;
+  object_class->get_property = gtk_editable_label_get_property;
+  object_class->dispose = gtk_editable_label_dispose;
+
+  properties[PROP_LABEL] = g_param_spec_string ("label",
+                                               P_("Label"),
+                                               P_("The text of the label"),
+                                               "",
+                                               GTK_PARAM_READWRITE);
+
+  g_object_class_install_properties (object_class, NUM_PROPERTIES, properties);
+
+  gtk_widget_class_install_action (widget_class, "editing.stop", NULL, gtk_editable_label_stop_editing);
+
+  gtk_widget_class_add_binding_action (widget_class,
+                                       GDK_KEY_Escape, 0,
+                                       "editing.stop",
+                                       NULL);
+
+  gtk_widget_class_set_layout_manager_type (widget_class, GTK_TYPE_BIN_LAYOUT);
+}
+
+GtkWidget *
+gtk_editable_label_new (const char *str)
+{
+  return g_object_new (GTK_TYPE_EDITABLE_LABEL,
+                       "label", str,
+                       NULL);
+}
+
+void
+gtk_editable_label_set_label (GtkEditableLabel *self,
+                              const char       *str)
+{
+  g_return_if_fail (GTK_IS_EDITABLE_LABEL (self));
+
+  gtk_label_set_label (GTK_LABEL (self->label), str);
+  gtk_editable_set_text (GTK_EDITABLE (self->entry), str);
+  g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_LABEL]);
+}
+
+const char *
+gtk_editable_label_get_label (GtkEditableLabel *self)
+{
+  g_return_val_if_fail (GTK_IS_EDITABLE_LABEL (self), NULL);
+
+  return gtk_label_get_label (GTK_LABEL (self->label));
+}
diff --git a/gtk/gtkeditablelabel.h b/gtk/gtkeditablelabel.h
new file mode 100644
index 0000000000..6c4e9bb0c2
--- /dev/null
+++ b/gtk/gtkeditablelabel.h
@@ -0,0 +1,45 @@
+/* GTK - The GIMP Toolkit
+ * Copyright (C) 2020 Red Hat, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GTK_EDITABLE_LABEL_H__
+#define __GTK_EDITABLE_LABEL_H__
+
+#if !defined (__GTK_H_INSIDE__) && !defined (GTK_COMPILATION)
+#error "Only <gtk/gtk.h> can be included directly."
+#endif
+
+#include <gtk/gtkwidget.h>
+
+G_BEGIN_DECLS
+
+#define GTK_TYPE_EDITABLE_LABEL (gtk_editable_label_get_type ())
+
+GDK_AVAILABLE_IN_ALL
+G_DECLARE_FINAL_TYPE (GtkEditableLabel, gtk_editable_label, GTK, EDITABLE_LABEL, GtkWidget)
+
+GDK_AVAILABLE_IN_ALL
+GtkWidget *           gtk_editable_label_new            (const char       *str);
+
+GDK_AVAILABLE_IN_ALL
+void                  gtk_editable_label_set_label      (GtkEditableLabel *self,
+                                                         const char       *str);
+GDK_AVAILABLE_IN_ALL
+const char *          gtk_editable_label_get_label      (GtkEditableLabel *self);
+
+G_END_DECLS
+
+#endif /* __GTK_EDITABLE_LABEL_H__ */
diff --git a/gtk/meson.build b/gtk/meson.build
index 3bf6baef7e..83048902a7 100644
--- a/gtk/meson.build
+++ b/gtk/meson.build
@@ -221,6 +221,7 @@ gtk_public_sources = files([
   'gtkdroptargetasync.c',
   'gtkdropdown.c',
   'gtkeditable.c',
+  'gtkeditablelabel.c',
   'gtkemojichooser.c',
   'gtkemojicompletion.c',
   'gtkentry.c',
@@ -504,6 +505,7 @@ gtk_public_headers = files([
   'gtkdroptargetasync.h',
   'gtkdropdown.h',
   'gtkeditable.h',
+  'gtkeditablelabel.h',
   'gtkemojichooser.h',
   'gtkentry.h',
   'gtkentrybuffer.h',