From 7a4532ff72a74ce74dee4b96b993ecd11f557acc Mon Sep 17 00:00:00 2001
From: Carlos Garnacho <carlosg@gnome.org>
Date: Mon, 11 Feb 2019 20:48:23 +0100
Subject: [PATCH] wacom: Update "Test your settings" button sensitivity on
 device availability

The button/popover are meaningless if there's no device to test with. Set
it inactive (so the popover hides if visible) and set insensitive if no
devices are found.

https://gitlab.gnome.org/GNOME/gnome-control-center/merge_requests/390
---
 panels/wacom/cc-wacom-panel.c | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/panels/wacom/cc-wacom-panel.c b/panels/wacom/cc-wacom-panel.c
index 77a1e261f..e4f3ca7fc 100644
--- a/panels/wacom/cc-wacom-panel.c
+++ b/panels/wacom/cc-wacom-panel.c
@@ -53,6 +53,7 @@ struct _CcWacomPanelPrivate
 	GtkWidget        *stylus_notebook;
 	GtkWidget        *test_popover;
 	GtkWidget        *test_draw_area;
+	GtkWidget        *test_button;
 	GHashTable       *devices; /* key=GsdDevice, value=CcWacomDevice */
 	GHashTable       *pages; /* key=device name, value=GtkWidget */
 	GHashTable       *stylus_pages; /* key=CcWacomTool, value=GtkWidget */
@@ -309,6 +310,22 @@ add_stylus (CcWacomPanel *self,
 	return TRUE;
 }
 
+static void
+update_test_button (CcWacomPanel *self)
+{
+	CcWacomPanelPrivate *priv = self->priv;;
+
+	if (!priv->test_button)
+		return;
+
+	if (g_hash_table_size (priv->devices) == 0) {
+		gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (priv->test_button), FALSE);
+		gtk_widget_set_sensitive (priv->test_button, FALSE);
+	} else {
+		gtk_widget_set_sensitive (priv->test_button, TRUE);
+	}
+}
+
 static void
 update_current_tool (CcWacomPanel  *panel,
 		     GdkDevice     *device,
@@ -422,6 +439,9 @@ cc_wacom_panel_constructed (GObject *object)
 
 	g_signal_connect_object (shell, "event",
 				 G_CALLBACK (on_shell_event_cb), self, 0);
+
+	priv->test_button = button;
+	update_test_button (self);
 }
 
 static const char *
@@ -561,6 +581,8 @@ update_current_page (CcWacomPanel  *self,
 		if (num_pages > 1)
 			gtk_notebook_set_current_page (GTK_NOTEBOOK (priv->tablet_notebook), 1);
 	}
+
+	update_test_button (self);
 }
 
 static void
-- 
2.20.1