[chronojump] ForceSensor exercise edit/delete buttons only if ex selected

[Xavier de Blas <xaviblas src gnome org>]

commit a6d74252ec4f0162f3fa239f61db8567cb2c3d26
Author: Xavier de Blas <xaviblas gmail com>
Date:   Mon Feb 17 19:15:57 2020 +0100

    ForceSensor exercise edit/delete buttons only if ex selected

 src/gui/app1/forceSensor.cs | 12 ++++++++++++
 1 file changed, 12 insertions(+)
---
diff --git a/src/gui/app1/forceSensor.cs b/src/gui/app1/forceSensor.cs
index 87dd2424..e09fe43e 100644
--- a/src/gui/app1/forceSensor.cs
+++ b/src/gui/app1/forceSensor.cs
@@ -58,6 +58,8 @@ public partial class ChronoJumpWindow
        [Widget] Gtk.SpinButton spin_force_sensor_calibration_kg_value;
        [Widget] Gtk.Button button_force_sensor_image_save_signal;
        [Widget] Gtk.DrawingArea force_capture_drawingarea;
+       [Widget] Gtk.Button button_force_sensor_exercise_edit;
+       [Widget] Gtk.Button button_force_sensor_exercise_delete;
 
        ForceSensorExerciseWindow forceSensorExerciseWin;
        ForceSensorElasticBandsWindow forceSensorElasticBandsWin;
@@ -2315,6 +2317,8 @@ LogB.Information(" fs R ");
 
                //needed because the += EventHandler does not work on first fill of the combo
                on_combo_force_sensor_exercise_changed (new object (), new EventArgs ());
+
+               
combo_force_sensor_button_sensitive_exercise(UtilGtk.ComboGetActive(combo_force_sensor_exercise) != "");
        }
 
        private void on_combo_force_sensor_exercise_changed (object o, EventArgs args)
@@ -2327,6 +2331,7 @@ LogB.Information(" fs R ");
                        label_button_force_sensor_stiffness.Text = "0";
                        image_button_force_sensor_stiffness_problem.Visible = true;
                        button_force_sensor_stiffness.Visible = false;
+                       combo_force_sensor_button_sensitive_exercise(false);
                        return;
                }
 
@@ -2344,6 +2349,7 @@ LogB.Information(" fs R ");
                        image_button_force_sensor_stiffness_problem.Visible = false;
                }
                setLabelContactsExerciseSelected(Catalog.GetString(fse.Name));
+               combo_force_sensor_button_sensitive_exercise(true);
        }
 
        private void fillForceSensorExerciseCombo(string name)
@@ -2374,6 +2380,12 @@ LogB.Information(" fs R ");
                        combo_force_sensor_exercise.Active = 
UtilGtk.ComboMakeActive(combo_force_sensor_exercise, name);
        }
 
+       private void combo_force_sensor_button_sensitive_exercise(bool exerciseSelected)
+       {
+               button_force_sensor_exercise_edit.Sensitive = exerciseSelected;
+               button_force_sensor_exercise_delete.Sensitive = exerciseSelected;
+       }
+
        void on_button_force_sensor_exercise_edit_clicked (object o, EventArgs args)
        {
                if(UtilGtk.ComboGetActive(combo_force_sensor_exercise) == "")