[gimp] app: also show line info (distance, angle) when moving an endpoint.

[Jehan Pagès <jehanp src gnome org>]

commit 5f00c189e6058635a02c2196fe3c623c97cc46b9
Author: Jehan <jehan girinstud io>
Date:   Fri Dec 22 23:41:40 2017 +0100

    app: also show line info (distance, angle) when moving an endpoint.
    
    When you move an endpoint in the Blend Tool, angle and distance
    information are especially important, in case you want to draw a
    gradient with specific values.

 app/display/gimptoolline.c |   47 +++++++++++++++++++++++++------------------
 1 files changed, 27 insertions(+), 20 deletions(-)
---
diff --git a/app/display/gimptoolline.c b/app/display/gimptoolline.c
index 3561644..6990e7d 100644
--- a/app/display/gimptoolline.c
+++ b/app/display/gimptoolline.c
@@ -1463,10 +1463,14 @@ gimp_tool_line_update_status (GimpToolLine    *line,
 
   if (proximity)
     {
-      gint             handle;
-      const gchar     *message                = NULL;
-      const gchar     *toggle_behavior_format = NULL;
-      gchar           *status;
+      GimpDisplayShell *shell;
+      const gchar      *toggle_behavior_format = NULL;
+      const gchar      *message                = NULL;
+      gchar            *line_status            = NULL;
+      gchar            *status;
+      gint              handle;
+
+      shell = gimp_tool_widget_get_shell (GIMP_TOOL_WIDGET (line));
 
       if (private->grab == GRAB_SELECTION)
         handle = private->selection;
@@ -1476,7 +1480,13 @@ gimp_tool_line_update_status (GimpToolLine    *line,
       if (handle == GIMP_TOOL_LINE_HANDLE_START ||
           handle == GIMP_TOOL_LINE_HANDLE_END)
         {
-          message                = _("Click-Drag to move the endpoint");
+          line_status = gimp_display_shell_get_line_status (shell,
+                                                            _("Click-Drag to move the endpoint"),
+                                                            ". ",
+                                                            private->x1,
+                                                            private->y1,
+                                                            private->x2,
+                                                            private->y2);
           toggle_behavior_format = _("%s for constrained angles");
         }
       else if (GIMP_TOOL_LINE_HANDLE_IS_SLIDER (handle) ||
@@ -1544,7 +1554,7 @@ gimp_tool_line_update_status (GimpToolLine    *line,
         }
 
       status =
-        gimp_suggest_modifiers (message ? message : "",
+        gimp_suggest_modifiers (message ? message : (line_status ? line_status : ""),
                                 ((toggle_behavior_format ?
                                    gimp_get_constrain_behavior_mask () : 0) |
                                  (private->grab == GRAB_NONE ?
@@ -1554,33 +1564,30 @@ gimp_tool_line_update_status (GimpToolLine    *line,
                                 toggle_behavior_format,
                                 _("%s to move the whole line"));
 
-      if (message)
+      if (message || line_status)
         {
           gimp_tool_widget_set_status (GIMP_TOOL_WIDGET (line), status);
         }
       else
         {
-          GimpDisplayShell *shell;
-          gchar            *enhanced_title;
-
-          shell = gimp_tool_widget_get_shell (GIMP_TOOL_WIDGET (line));
-          enhanced_title = gimp_display_shell_get_line_status (shell,
-                                                               private->status_title,
-                                                               ". ",
-                                                               private->x1,
-                                                               private->y1,
-                                                               private->x2,
-                                                               private->y2);
+          line_status = gimp_display_shell_get_line_status (shell,
+                                                            private->status_title,
+                                                            ". ",
+                                                            private->x1,
+                                                            private->y1,
+                                                            private->x2,
+                                                            private->y2);
           gimp_tool_widget_set_status_coords (GIMP_TOOL_WIDGET (line),
-                                              enhanced_title,
+                                              line_status,
                                               private->x2 - private->x1,
                                               ", ",
                                               private->y2 - private->y1,
                                               status);
-          g_free (enhanced_title);
         }
 
       g_free (status);
+      if (line_status)
+        g_free (line_status);
     }
   else
     {