[gnome-color-manager] Set a tooltip explaining why the calibrate button is insensitive

[Richard Hughes <rhughes src gnome org>]

commit 5c3e9d80563235762ab70195ac9402f47c49a49d
Author: Richard Hughes <richard hughsie com>
Date:   Thu Feb 18 18:18:56 2010 +0000

    Set a tooltip explaining why the calibrate button is insensitive

 data/gcm-prefs.ui |    1 -
 src/gcm-prefs.c   |   25 ++++++++++++++++++++-----
 2 files changed, 20 insertions(+), 6 deletions(-)
---
diff --git a/data/gcm-prefs.ui b/data/gcm-prefs.ui
index 37bb446..7b0661c 100644
--- a/data/gcm-prefs.ui
+++ b/data/gcm-prefs.ui
@@ -65,7 +65,6 @@
                                     <property name="visible">True</property>
                                     <property name="can_focus">True</property>
                                     <property name="receives_default">True</property>
-                                    <property name="tooltip_text" translatable="yes">Create a color profile for the selected device</property>
                                     <property name="use_underline">True</property>
                                   </object>
                                   <packing>
diff --git a/src/gcm-prefs.c b/src/gcm-prefs.c
index d5a37cc..34ffd55 100644
--- a/src/gcm-prefs.c
+++ b/src/gcm-prefs.c
@@ -927,12 +927,19 @@ gcm_prefs_set_calibrate_button_sensitivity (void)
 {
 	gboolean ret = FALSE;
 	GtkWidget *widget;
+	const gchar *tooltip;
 	GcmDeviceTypeEnum type;
 	gboolean connected;
 
+	/* TRANSLATORS: this is when the button is sensitive */
+	tooltip = _("Create a color profile for the selected device");
+
 	/* no device selected */
-	if (current_device == NULL)
+	if (current_device == NULL) {
+		/* TRANSLATORS: this is when the button is insensitive */
+		tooltip = _("Cannot calibrate: No device is selected");
 		goto out;
+	}
 
 	/* get current device properties */
 	g_object_get (current_device,
@@ -944,8 +951,11 @@ gcm_prefs_set_calibrate_button_sensitivity (void)
 	if (type == GCM_DEVICE_TYPE_ENUM_DISPLAY) {
 
 		/* are we disconnected */
-		if (!connected)
+		if (!connected) {
+			/* TRANSLATORS: this is when the button is insensitive */
+			tooltip = _("Cannot calibrate: The device is not connected");
 			goto out;
+		}
 
 		/* find whether we have hardware installed */
 		ret = gcm_colorimeter_get_present (colorimeter);
@@ -953,6 +963,10 @@ gcm_prefs_set_calibrate_button_sensitivity (void)
 		egg_debug ("overriding device presence %i with TRUE", ret);
 		ret = TRUE;
 #endif
+		if (!ret) {
+			/* TRANSLATORS: this is when the button is insensitive */
+			tooltip = _("Cannot calibrate: The colorimeter is not plugged in");
+		}
 	} else if (type == GCM_DEVICE_TYPE_ENUM_SCANNER ||
 		   type == GCM_DEVICE_TYPE_ENUM_CAMERA) {
 
@@ -960,12 +974,13 @@ gcm_prefs_set_calibrate_button_sensitivity (void)
 		ret = TRUE;
 	} else {
 
-		/* we can't calibrate this type of device */
-		ret = FALSE;
+		/* TRANSLATORS: this is when the button is insensitive */
+		tooltip = _("Cannot calibrate this type of device");
 	}
 out:
-	/* disable the button if no supported hardware is found */
+	/* control the tooltip and sensitivity of the button */
 	widget = GTK_WIDGET (gtk_builder_get_object (builder, "button_calibrate"));
+	gtk_widget_set_tooltip_text (widget, tooltip);
 	gtk_widget_set_sensitive (widget, ret);
 }