Enable unit evaluation in toolbars.

(bzr r12475.1.22)

17 files changed, 56 insertions, 40 deletions

diff --git a/src/widgets/calligraphy-toolbar.cpp b/src/widgets/calligraphy-toolbar.cpp
index 1f91b9fe2..12228ce56 100644
--- a/src/widgets/calligraphy-toolbar.cpp
+++ b/src/widgets/calligraphy-toolbar.cpp
@@ -450,7 +450,7 @@ void sp_calligraphy_toolbox_prep(SPDesktop *desktop, GtkActionGroup* mainActions
                                                               GTK_WIDGET(desktop->canvas), holder, TRUE, "altx-calligraphy",
                                                               1, 100, 1.0, 10.0,
                                                               labels, values, G_N_ELEMENTS(labels),
-                                                              sp_ddc_width_value_changed,  1, 0 );
+                                                              sp_ddc_width_value_changed, NULL /*unit tracker*/, 1, 0 );
         ege_adjustment_action_set_appearance( eact, TOOLBAR_SLIDER_HINT );
         gtk_action_group_add_action( mainActions, GTK_ACTION(eact) );
         gtk_action_set_sensitive( GTK_ACTION(eact), TRUE );
@@ -467,7 +467,7 @@ void sp_calligraphy_toolbox_prep(SPDesktop *desktop, GtkActionGroup* mainActions
                                                               GTK_WIDGET(desktop->canvas), holder, FALSE, NULL,
                                                               -100, 100, 1, 10.0,
                                                               labels, values, G_N_ELEMENTS(labels),
-                                                              sp_ddc_velthin_value_changed, 1, 0);
+                                                              sp_ddc_velthin_value_changed, NULL /*unit tracker*/, 1, 0);
         gtk_action_group_add_action( mainActions, GTK_ACTION(eact) );
         gtk_action_set_sensitive( GTK_ACTION(eact), TRUE );
         }
@@ -483,7 +483,7 @@ void sp_calligraphy_toolbox_prep(SPDesktop *desktop, GtkActionGroup* mainActions
                                                               GTK_WIDGET(desktop->canvas), holder, TRUE, "calligraphy-angle",
                                                               -90.0, 90.0, 1.0, 10.0,
                                                               labels, values, G_N_ELEMENTS(labels),
-                                                              sp_ddc_angle_value_changed, 1, 0 );
+                                                              sp_ddc_angle_value_changed, NULL /*unit tracker*/, 1, 0 );
         gtk_action_group_add_action( mainActions, GTK_ACTION(eact) );
         g_object_set_data( holder, "angle_action", eact );
         gtk_action_set_sensitive( GTK_ACTION(eact), TRUE );
@@ -501,7 +501,7 @@ void sp_calligraphy_toolbox_prep(SPDesktop *desktop, GtkActionGroup* mainActions
                                                               GTK_WIDGET(desktop->canvas), holder, FALSE, NULL,
                                                               0.0, 100, 1.0, 10.0,
                                                               labels, values, G_N_ELEMENTS(labels),
-                                                              sp_ddc_flatness_value_changed, 1, 0);
+                                                              sp_ddc_flatness_value_changed, NULL /*unit tracker*/, 1, 0);
         gtk_action_group_add_action( mainActions, GTK_ACTION(eact) );
         gtk_action_set_sensitive( GTK_ACTION(eact), TRUE );
         }
@@ -518,7 +518,7 @@ void sp_calligraphy_toolbox_prep(SPDesktop *desktop, GtkActionGroup* mainActions
                                                               GTK_WIDGET(desktop->canvas), holder, FALSE, NULL,
                                                               0.0, 5.0, 0.01, 0.1,
                                                               labels, values, G_N_ELEMENTS(labels),
-                                                              sp_ddc_cap_rounding_value_changed, 0.01, 2 );
+                                                              sp_ddc_cap_rounding_value_changed, NULL /*unit tracker*/, 0.01, 2 );
         gtk_action_group_add_action( mainActions, GTK_ACTION(eact) );
         gtk_action_set_sensitive( GTK_ACTION(eact), TRUE );
         }
@@ -534,7 +534,7 @@ void sp_calligraphy_toolbox_prep(SPDesktop *desktop, GtkActionGroup* mainActions
                                                               GTK_WIDGET(desktop->canvas), holder, FALSE, NULL,
                                                               0.0, 100, 1, 10.0,
                                                               labels, values, G_N_ELEMENTS(labels),
-                                                              sp_ddc_tremor_value_changed, 1, 0);
+                                                              sp_ddc_tremor_value_changed, NULL /*unit tracker*/, 1, 0);
 
         ege_adjustment_action_set_appearance( eact, TOOLBAR_SLIDER_HINT );
         gtk_action_group_add_action( mainActions, GTK_ACTION(eact) );
@@ -552,7 +552,7 @@ void sp_calligraphy_toolbox_prep(SPDesktop *desktop, GtkActionGroup* mainActions
                                                               GTK_WIDGET(desktop->canvas), holder, FALSE, NULL,
                                                               0.0, 100, 1, 10.0,
                                                               labels, values, G_N_ELEMENTS(labels),
-                                                              sp_ddc_wiggle_value_changed, 1, 0);
+                                                              sp_ddc_wiggle_value_changed, NULL /*unit tracker*/, 1, 0);
         ege_adjustment_action_set_appearance( eact, TOOLBAR_SLIDER_HINT );
         gtk_action_group_add_action( mainActions, GTK_ACTION(eact) );
         gtk_action_set_sensitive( GTK_ACTION(eact), TRUE );
@@ -569,7 +569,7 @@ void sp_calligraphy_toolbox_prep(SPDesktop *desktop, GtkActionGroup* mainActions
                                                               GTK_WIDGET(desktop->canvas), holder, FALSE, NULL,
                                                               0.0, 100, 1, 10.0,
                                                               labels, values, G_N_ELEMENTS(labels),
-                                                              sp_ddc_mass_value_changed, 1, 0);
+                                                              sp_ddc_mass_value_changed, NULL /*unit tracker*/, 1, 0);
         ege_adjustment_action_set_appearance( eact, TOOLBAR_SLIDER_HINT );
         gtk_action_group_add_action( mainActions, GTK_ACTION(eact) );
         gtk_action_set_sensitive( GTK_ACTION(eact), TRUE );
diff --git a/src/widgets/connector-toolbar.cpp b/src/widgets/connector-toolbar.cpp
index 54344e446..2e5c2ade1 100644
--- a/src/widgets/connector-toolbar.cpp
+++ b/src/widgets/connector-toolbar.cpp
@@ -364,7 +364,7 @@ void sp_connector_toolbox_prep( SPDesktop *desktop, GtkActionGroup* mainActions,
                                     GTK_WIDGET(desktop->canvas), holder, TRUE, "inkscape:connector-curvature",
                                     0, 100, 1.0, 10.0,
                                     0, 0, 0,
-                                    connector_curvature_changed, 1, 0 );
+                                    connector_curvature_changed, NULL /*unit tracker*/, 1, 0 );
     gtk_action_group_add_action( mainActions, GTK_ACTION(eact) );
 
     // Spacing spinbox
@@ -375,7 +375,7 @@ void sp_connector_toolbox_prep( SPDesktop *desktop, GtkActionGroup* mainActions,
                                     GTK_WIDGET(desktop->canvas), holder, TRUE, "inkscape:connector-spacing",
                                     0, 100, 1.0, 10.0,
                                     0, 0, 0,
-                                    connector_spacing_changed, 1, 0 );
+                                    connector_spacing_changed, NULL /*unit tracker*/, 1, 0 );
     gtk_action_group_add_action( mainActions, GTK_ACTION(eact) );
 
     // Graph (connector network) layout
@@ -397,7 +397,7 @@ void sp_connector_toolbox_prep( SPDesktop *desktop, GtkActionGroup* mainActions,
                                      GTK_WIDGET(desktop->canvas), holder, TRUE, "inkscape:connector-length",
                                      10, 1000, 10.0, 100.0,
                                      0, 0, 0,
-                                     connector_length_changed, 1, 0 );
+                                     connector_length_changed, NULL /*unit tracker*/, 1, 0 );
     gtk_action_group_add_action( mainActions, GTK_ACTION(eact) );
 
 
diff --git a/src/widgets/eraser-toolbar.cpp b/src/widgets/eraser-toolbar.cpp
index 3f5e60780..1af574ed6 100644
--- a/src/widgets/eraser-toolbar.cpp
+++ b/src/widgets/eraser-toolbar.cpp
@@ -148,7 +148,7 @@ void sp_eraser_toolbox_prep(SPDesktop *desktop, GtkActionGroup* mainActions, GOb
                                                               GTK_WIDGET(desktop->canvas), holder, TRUE, "altx-eraser",
                                                               1, 100, 1.0, 10.0,
                                                               labels, values, G_N_ELEMENTS(labels),
-                                                              sp_erc_width_value_changed, 1, 0);
+                                                              sp_erc_width_value_changed, NULL /*unit tracker*/, 1, 0);
         ege_adjustment_action_set_appearance( eact, TOOLBAR_SLIDER_HINT );
         gtk_action_group_add_action( mainActions, GTK_ACTION(eact) );
         gtk_action_set_sensitive( GTK_ACTION(eact), TRUE );
diff --git a/src/widgets/gradient-toolbar.cpp b/src/widgets/gradient-toolbar.cpp
index c1eb13ceb..05a8b8b1c 100644
--- a/src/widgets/gradient-toolbar.cpp
+++ b/src/widgets/gradient-toolbar.cpp
@@ -1174,8 +1174,9 @@ void sp_gradient_toolbox_prep(SPDesktop * desktop, GtkActionGroup* mainActions,
                                          GTK_WIDGET(desktop->canvas), holder, FALSE, NULL,
                                          0.0, 1.0, 0.01, 0.1,
                                          0, 0, 0,
-                                         gr_stop_offset_adjustment_changed
-                                         , 0.01, 2, 1.0);
+                                         gr_stop_offset_adjustment_changed,
+                                         NULL /*unit tracker*/,
+                                         0.01, 2, 1.0);
 
         gtk_action_group_add_action( mainActions, GTK_ACTION(eact) );
         g_object_set_data( holder, "offset_action", eact );
diff --git a/src/widgets/mesh-toolbar.cpp b/src/widgets/mesh-toolbar.cpp
index 37763ab34..582243870 100644
--- a/src/widgets/mesh-toolbar.cpp
+++ b/src/widgets/mesh-toolbar.cpp
@@ -265,7 +265,7 @@ void sp_mesh_toolbox_prep(SPDesktop * desktop, GtkActionGroup* mainActions, GObj
                                          GTK_WIDGET(desktop->canvas), holder, FALSE, NULL,
                                          1, 20, 1, 1,
                                          labels, values, G_N_ELEMENTS(labels),
-                                         ms_row_changed,
+                                         ms_row_changed, NULL /*unit tracker*/,
                                          1.0, 0 );
         gtk_action_group_add_action( mainActions, GTK_ACTION(eact) );
         gtk_action_set_sensitive( GTK_ACTION(eact), TRUE );
@@ -281,7 +281,7 @@ void sp_mesh_toolbox_prep(SPDesktop * desktop, GtkActionGroup* mainActions, GObj
                                          GTK_WIDGET(desktop->canvas), holder, FALSE, NULL,
                                          1, 20, 1, 1,
                                          labels, values, G_N_ELEMENTS(labels),
-                                         ms_col_changed,
+                                         ms_col_changed, NULL /*unit tracker*/,
                                          1.0, 0 );
         gtk_action_group_add_action( mainActions, GTK_ACTION(eact) );
         gtk_action_set_sensitive( GTK_ACTION(eact), TRUE );
diff --git a/src/widgets/node-toolbar.cpp b/src/widgets/node-toolbar.cpp
index a9e298f1d..c3e5b22ce 100644
--- a/src/widgets/node-toolbar.cpp
+++ b/src/widgets/node-toolbar.cpp
@@ -595,7 +595,7 @@ void sp_node_toolbox_prep(SPDesktop *desktop, GtkActionGroup* mainActions, GObje
                                          GTK_WIDGET(desktop->canvas), holder, TRUE, "altx-nodes",
                                          -1e6, 1e6, SPIN_STEP, SPIN_PAGE_STEP,
                                          labels, values, G_N_ELEMENTS(labels),
-                                         sp_node_path_x_value_changed );
+                                         sp_node_path_x_value_changed, tracker );
         tracker->addAdjustment( ege_adjustment_action_get_adjustment(eact) );
         g_object_set_data( holder, "nodes_x_action", eact );
         gtk_action_set_sensitive( GTK_ACTION(eact), FALSE );
@@ -613,7 +613,7 @@ void sp_node_toolbox_prep(SPDesktop *desktop, GtkActionGroup* mainActions, GObje
                                          GTK_WIDGET(desktop->canvas), holder, FALSE, NULL,
                                          -1e6, 1e6, SPIN_STEP, SPIN_PAGE_STEP,
                                          labels, values, G_N_ELEMENTS(labels),
-                                         sp_node_path_y_value_changed );
+                                         sp_node_path_y_value_changed, tracker );
         tracker->addAdjustment( ege_adjustment_action_get_adjustment(eact) );
         g_object_set_data( holder, "nodes_y_action", eact );
         gtk_action_set_sensitive( GTK_ACTION(eact), FALSE );
diff --git a/src/widgets/paintbucket-toolbar.cpp b/src/widgets/paintbucket-toolbar.cpp
index 7c23379cd..7ab3bed0a 100644
--- a/src/widgets/paintbucket-toolbar.cpp
+++ b/src/widgets/paintbucket-toolbar.cpp
@@ -168,7 +168,7 @@ void sp_paintbucket_toolbox_prep(SPDesktop *desktop, GtkActionGroup* mainActions
             "/tools/paintbucket/threshold", 5, GTK_WIDGET(desktop->canvas), holder, TRUE,
             "inkscape:paintbucket-threshold", 0, 100.0, 1.0, 10.0,
             0, 0, 0,
-            paintbucket_threshold_changed, 1, 0 );
+            paintbucket_threshold_changed, NULL /*unit tracker*/, 1, 0 );
 
         ege_adjustment_action_set_appearance( eact, TOOLBAR_SLIDER_HINT );
         gtk_action_group_add_action( mainActions, GTK_ACTION(eact) );
@@ -196,7 +196,7 @@ void sp_paintbucket_toolbox_prep(SPDesktop *desktop, GtkActionGroup* mainActions
             "/tools/paintbucket/offset", 0, GTK_WIDGET(desktop->canvas), holder, TRUE,
             "inkscape:paintbucket-offset", -1e4, 1e4, 0.1, 0.5,
             0, 0, 0,
-            paintbucket_offset_changed, 1, 2);
+            paintbucket_offset_changed, tracker, 1, 2);
         tracker->addAdjustment( ege_adjustment_action_get_adjustment(eact) );
 
         gtk_action_group_add_action( mainActions, GTK_ACTION(eact) );
diff --git a/src/widgets/pencil-toolbar.cpp b/src/widgets/pencil-toolbar.cpp
index 851ad7134..f112a35fa 100644
--- a/src/widgets/pencil-toolbar.cpp
+++ b/src/widgets/pencil-toolbar.cpp
@@ -307,6 +307,7 @@ void sp_pencil_toolbox_prep(SPDesktop *desktop, GtkActionGroup* mainActions, GOb
                                          1, 100.0, 0.5, 1.0,
                                          labels, values, G_N_ELEMENTS(labels),
                                          sp_pencil_tb_tolerance_value_changed,
+                                         NULL /*unit tracker*/,
                                          1, 2);
         ege_adjustment_action_set_appearance( eact, TOOLBAR_SLIDER_HINT );
         gtk_action_group_add_action( mainActions, GTK_ACTION(eact) );
diff --git a/src/widgets/rect-toolbar.cpp b/src/widgets/rect-toolbar.cpp
index 6dfd9cfcb..a830329cd 100644
--- a/src/widgets/rect-toolbar.cpp
+++ b/src/widgets/rect-toolbar.cpp
@@ -319,7 +319,7 @@ void sp_rect_toolbox_prep(SPDesktop *desktop, GtkActionGroup* mainActions, GObje
                                          GTK_WIDGET(desktop->canvas), holder, TRUE, "altx-rect",
                                          0, 1e6, SPIN_STEP, SPIN_PAGE_STEP,
                                          labels, values, G_N_ELEMENTS(labels),
-                                         sp_rtb_width_value_changed );
+                                         sp_rtb_width_value_changed, tracker);
         tracker->addAdjustment( ege_adjustment_action_get_adjustment(eact) );
         g_object_set_data( holder, "width_action", eact );
         gtk_action_set_sensitive( GTK_ACTION(eact), FALSE );
@@ -336,7 +336,7 @@ void sp_rect_toolbox_prep(SPDesktop *desktop, GtkActionGroup* mainActions, GObje
                                          GTK_WIDGET(desktop->canvas), holder, FALSE, NULL,
                                          0, 1e6, SPIN_STEP, SPIN_PAGE_STEP,
                                          labels, values, G_N_ELEMENTS(labels),
-                                         sp_rtb_height_value_changed );
+                                         sp_rtb_height_value_changed, tracker);
         tracker->addAdjustment( ege_adjustment_action_get_adjustment(eact) );
         g_object_set_data( holder, "height_action", eact );
         gtk_action_set_sensitive( GTK_ACTION(eact), FALSE );
@@ -353,7 +353,7 @@ void sp_rect_toolbox_prep(SPDesktop *desktop, GtkActionGroup* mainActions, GObje
                                          GTK_WIDGET(desktop->canvas), holder, FALSE, NULL,
                                          0, 1e6, SPIN_STEP, SPIN_PAGE_STEP,
                                          labels, values, G_N_ELEMENTS(labels),
-                                         sp_rtb_rx_value_changed);
+                                         sp_rtb_rx_value_changed, tracker);
         tracker->addAdjustment( ege_adjustment_action_get_adjustment(eact) );
         gtk_action_group_add_action( mainActions, GTK_ACTION(eact) );
     }
@@ -368,7 +368,7 @@ void sp_rect_toolbox_prep(SPDesktop *desktop, GtkActionGroup* mainActions, GObje
                                          GTK_WIDGET(desktop->canvas), holder, FALSE, NULL,
                                          0, 1e6, SPIN_STEP, SPIN_PAGE_STEP,
                                          labels, values, G_N_ELEMENTS(labels),
-                                         sp_rtb_ry_value_changed);
+                                         sp_rtb_ry_value_changed, tracker);
         tracker->addAdjustment( ege_adjustment_action_get_adjustment(eact) );
         gtk_action_group_add_action( mainActions, GTK_ACTION(eact) );
     }
diff --git a/src/widgets/select-toolbar.cpp b/src/widgets/select-toolbar.cpp
index e4a5a2905..590b0867f 100644
--- a/src/widgets/select-toolbar.cpp
+++ b/src/widgets/select-toolbar.cpp
@@ -273,7 +273,7 @@ sp_object_layout_any_value_changed(GtkAdjustment *adj, SPWidget *spw)
     g_object_set_data(G_OBJECT(spw), "update", GINT_TO_POINTER(FALSE));
 }
 
-static GtkWidget* createCustomSlider( GtkAdjustment *adjustment, gdouble climbRate, guint digits )
+static GtkWidget* createCustomSlider( GtkAdjustment *adjustment, gdouble climbRate, guint digits, Inkscape::UI::Widget::UnitTracker *unit_tracker )
 {
 #if WITH_GTKMM_3_0
     Glib::RefPtr<Gtk::Adjustment> adj = Glib::wrap(adjustment, true);
@@ -281,6 +281,7 @@ static GtkWidget* createCustomSlider( GtkAdjustment *adjustment, gdouble climbRa
 #else
     Inkscape::UI::Widget::SpinButton *inkSpinner = new Inkscape::UI::Widget::SpinButton(*Glib::wrap(adjustment, true), climbRate, digits);
 #endif
+    inkSpinner->addUnitTracker(unit_tracker);
     inkSpinner = Gtk::manage( inkSpinner );
     GtkWidget *widget = GTK_WIDGET( inkSpinner->gobj() );
     return widget;
@@ -313,7 +314,7 @@ static EgeAdjustmentAction * create_adjustment_action( gchar const *name,
         g_object_set_data( G_OBJECT(spw), data, adj );
     }
 
-    EgeAdjustmentAction* act = ege_adjustment_action_new( adj, name, Q_(label), tooltip, 0, SPIN_STEP, 3 );
+    EgeAdjustmentAction* act = ege_adjustment_action_new( adj, name, Q_(label), tooltip, 0, SPIN_STEP, 3, tracker );
     if ( shortLabel ) {
         g_object_set( act, "short_label", Q_(shortLabel), NULL );
     }
diff --git a/src/widgets/spiral-toolbar.cpp b/src/widgets/spiral-toolbar.cpp
index cccaf5154..b4e8e68a7 100644
--- a/src/widgets/spiral-toolbar.cpp
+++ b/src/widgets/spiral-toolbar.cpp
@@ -262,7 +262,7 @@ void sp_spiral_toolbox_prep(SPDesktop *desktop, GtkActionGroup* mainActions, GOb
                                          GTK_WIDGET(desktop->canvas), holder, TRUE, "altx-spiral",
                                          0.01, 1024.0, 0.1, 1.0,
                                          labels, values, G_N_ELEMENTS(labels),
-                                         sp_spl_tb_revolution_value_changed, 1, 2);
+                                         sp_spl_tb_revolution_value_changed, NULL /*unit tracker*/, 1, 2);
         gtk_action_group_add_action( mainActions, GTK_ACTION(eact) );
     }
 
diff --git a/src/widgets/spray-toolbar.cpp b/src/widgets/spray-toolbar.cpp
index fe221f695..247df53e2 100644
--- a/src/widgets/spray-toolbar.cpp
+++ b/src/widgets/spray-toolbar.cpp
@@ -130,7 +130,7 @@ void sp_spray_toolbox_prep(SPDesktop *desktop, GtkActionGroup* mainActions, GObj
                                                               GTK_WIDGET(desktop->canvas), holder, TRUE, "altx-spray",
                                                               1, 100, 1.0, 10.0,
                                                               labels, values, G_N_ELEMENTS(labels),
-                                                              sp_spray_width_value_changed,  1, 0 );
+                                                              sp_spray_width_value_changed, NULL /*unit tracker*/, 1, 0 );
         ege_adjustment_action_set_appearance( eact, TOOLBAR_SLIDER_HINT );
         gtk_action_group_add_action( mainActions, GTK_ACTION(eact) );
         gtk_action_set_sensitive( GTK_ACTION(eact), TRUE );
@@ -146,7 +146,7 @@ void sp_spray_toolbox_prep(SPDesktop *desktop, GtkActionGroup* mainActions, GObj
                                                               GTK_WIDGET(desktop->canvas), holder, TRUE, "spray-mean",
                                                               0, 100, 1.0, 10.0,
                                                               labels, values, G_N_ELEMENTS(labels),
-                                                              sp_spray_mean_value_changed,  1, 0 );
+                                                              sp_spray_mean_value_changed, NULL /*unit tracker*/, 1, 0 );
         ege_adjustment_action_set_appearance( eact, TOOLBAR_SLIDER_HINT );
         gtk_action_group_add_action( mainActions, GTK_ACTION(eact) );
         gtk_action_set_sensitive( GTK_ACTION(eact), TRUE );
@@ -162,7 +162,7 @@ void sp_spray_toolbox_prep(SPDesktop *desktop, GtkActionGroup* mainActions, GObj
                                                               GTK_WIDGET(desktop->canvas), holder, TRUE, "spray-standard_deviation",
                                                               1, 100, 1.0, 10.0,
                                                               labels, values, G_N_ELEMENTS(labels),
-                                                              sp_spray_standard_deviation_value_changed,  1, 0 );
+                                                              sp_spray_standard_deviation_value_changed, NULL /*unit tracker*/, 1, 0 );
         ege_adjustment_action_set_appearance( eact, TOOLBAR_SLIDER_HINT );
         gtk_action_group_add_action( mainActions, GTK_ACTION(eact) );
         gtk_action_set_sensitive( GTK_ACTION(eact), TRUE );
@@ -223,7 +223,7 @@ void sp_spray_toolbox_prep(SPDesktop *desktop, GtkActionGroup* mainActions, GObj
                                                               GTK_WIDGET(desktop->canvas), holder, TRUE, "spray-population",
                                                               1, 100, 1.0, 10.0,
                                                               labels, values, G_N_ELEMENTS(labels),
-                                                              sp_spray_population_value_changed,  1, 0 );
+                                                              sp_spray_population_value_changed, NULL /*unit tracker*/, 1, 0 );
         ege_adjustment_action_set_appearance( eact, TOOLBAR_SLIDER_HINT );
         gtk_action_group_add_action( mainActions, GTK_ACTION(eact) );
         gtk_action_set_sensitive( GTK_ACTION(eact), TRUE );
@@ -254,7 +254,7 @@ void sp_spray_toolbox_prep(SPDesktop *desktop, GtkActionGroup* mainActions, GObj
                                                               GTK_WIDGET(desktop->canvas), holder, TRUE, "spray-rotation",
                                                               0, 100, 1.0, 10.0,
                                                               labels, values, G_N_ELEMENTS(labels),
-                                                              sp_spray_rotation_value_changed,  1, 0 );
+                                                              sp_spray_rotation_value_changed, NULL /*unit tracker*/, 1, 0 );
         ege_adjustment_action_set_appearance( eact, TOOLBAR_SLIDER_HINT );
         gtk_action_group_add_action( mainActions, GTK_ACTION(eact) );
         gtk_action_set_sensitive( GTK_ACTION(eact), TRUE );
@@ -272,7 +272,7 @@ void sp_spray_toolbox_prep(SPDesktop *desktop, GtkActionGroup* mainActions, GObj
                                                               GTK_WIDGET(desktop->canvas), holder, TRUE, "spray-scale",
                                                               0, 100, 1.0, 10.0,
                                                               labels, values, G_N_ELEMENTS(labels),
-                                                              sp_spray_scale_value_changed,  1, 0 );
+                                                              sp_spray_scale_value_changed, NULL /*unit tracker*/, 1, 0 );
         ege_adjustment_action_set_appearance( eact, TOOLBAR_SLIDER_HINT );
         gtk_action_group_add_action( mainActions, GTK_ACTION(eact) );
         gtk_action_set_sensitive( GTK_ACTION(eact), TRUE );
diff --git a/src/widgets/star-toolbar.cpp b/src/widgets/star-toolbar.cpp
index 9f7dd95e0..9e26988ff 100644
--- a/src/widgets/star-toolbar.cpp
+++ b/src/widgets/star-toolbar.cpp
@@ -504,7 +504,7 @@ void sp_star_toolbox_prep(SPDesktop *desktop, GtkActionGroup* mainActions, GObje
                                          GTK_WIDGET(desktop->canvas), holder, FALSE, NULL,
                                          3, 1024, 1, 5,
                                          labels, values, G_N_ELEMENTS(labels),
-                                         sp_stb_magnitude_value_changed,
+                                         sp_stb_magnitude_value_changed, NULL /*unit tracker*/,
                                          1.0, 0 );
         gtk_action_group_add_action( mainActions, GTK_ACTION(eact) );
         gtk_action_set_sensitive( GTK_ACTION(eact), TRUE );
@@ -559,7 +559,7 @@ void sp_star_toolbox_prep(SPDesktop *desktop, GtkActionGroup* mainActions, GObje
                                          GTK_WIDGET(desktop->canvas), holder, FALSE, NULL,
                                          -10.0, 10.0, 0.001, 0.01,
                                          labels, values, G_N_ELEMENTS(labels),
-                                         sp_stb_randomized_value_changed, 0.1, 3 );
+                                         sp_stb_randomized_value_changed, NULL /*unit tracker*/, 0.1, 3 );
         gtk_action_group_add_action( mainActions, GTK_ACTION(eact) );
         gtk_action_set_sensitive( GTK_ACTION(eact), TRUE );
         }
diff --git a/src/widgets/text-toolbar.cpp b/src/widgets/text-toolbar.cpp
index 7554f4faf..6b9fc900c 100644
--- a/src/widgets/text-toolbar.cpp
+++ b/src/widgets/text-toolbar.cpp
@@ -1459,6 +1459,7 @@ void sp_text_toolbox_prep(SPDesktop *desktop, GtkActionGroup* mainActions, GObje
             0.0, 10.0, 0.01, 0.10,                /* lower, upper, step (arrow up/down), page up/down */
             labels, values, G_N_ELEMENTS(labels), /* drop down menu */
             sp_text_lineheight_value_changed,     /* callback */
+            NULL,                                 /* unit tracker */
             0.1,                                  /* step (used?) */
             2,                                    /* digits to show */
             1.0                                   /* factor (multiplies default) */
@@ -1489,6 +1490,7 @@ void sp_text_toolbox_prep(SPDesktop *desktop, GtkActionGroup* mainActions, GObje
             -100.0, 100.0, 0.01, 0.10,            /* lower, upper, step (arrow up/down), page up/down */
             labels, values, G_N_ELEMENTS(labels), /* drop down menu */
             sp_text_wordspacing_value_changed,    /* callback */
+            NULL,                                 /* unit tracker */
             0.1,                                  /* step (used?) */
             2,                                    /* digits to show */
             1.0                                   /* factor (multiplies default) */
@@ -1519,6 +1521,7 @@ void sp_text_toolbox_prep(SPDesktop *desktop, GtkActionGroup* mainActions, GObje
             -100.0, 100.0, 0.01, 0.10,            /* lower, upper, step (arrow up/down), page up/down */
             labels, values, G_N_ELEMENTS(labels), /* drop down menu */
             sp_text_letterspacing_value_changed,  /* callback */
+            NULL,                                 /* unit tracker */
             0.1,                                  /* step (used?) */
             2,                                    /* digits to show */
             1.0                                   /* factor (multiplies default) */
@@ -1549,6 +1552,7 @@ void sp_text_toolbox_prep(SPDesktop *desktop, GtkActionGroup* mainActions, GObje
             -100.0, 100.0, 0.01, 0.1,             /* lower, upper, step (arrow up/down), page up/down */
             labels, values, G_N_ELEMENTS(labels), /* drop down menu */
             sp_text_dx_value_changed,             /* callback */
+            NULL,                                 /* unit tracker */
             0.1,                                  /* step (used?) */
             2,                                    /* digits to show */
             1.0                                   /* factor (multiplies default) */
@@ -1579,6 +1583,7 @@ void sp_text_toolbox_prep(SPDesktop *desktop, GtkActionGroup* mainActions, GObje
             -100.0, 100.0, 0.01, 0.1,             /* lower, upper, step (arrow up/down), page up/down */
             labels, values, G_N_ELEMENTS(labels), /* drop down menu */
             sp_text_dy_value_changed,             /* callback */
+            NULL,                                 /* unit tracker */
             0.1,                                  /* step (used?) */
             2,                                    /* digits to show */
             1.0                                   /* factor (multiplies default) */
@@ -1609,6 +1614,7 @@ void sp_text_toolbox_prep(SPDesktop *desktop, GtkActionGroup* mainActions, GObje
             -180.0, 180.0, 0.1, 1.0,              /* lower, upper, step (arrow up/down), page up/down */
             labels, values, G_N_ELEMENTS(labels), /* drop down menu */
             sp_text_rotation_value_changed,       /* callback */
+            NULL,                                 /* unit tracker */
             0.1,                                  /* step (used?) */
             2,                                    /* digits to show */
             1.0                                   /* factor (multiplies default) */
diff --git a/src/widgets/toolbox.cpp b/src/widgets/toolbox.cpp
index f3a83e84a..f4ec80f4e 100644
--- a/src/widgets/toolbox.cpp
+++ b/src/widgets/toolbox.cpp
@@ -1010,7 +1010,7 @@ GtkWidget *ToolboxFactory::createSnapToolbox()
     return toolboxNewCommon( tb, BAR_SNAP, GTK_POS_LEFT );
 }
 
-static GtkWidget* createCustomSlider( GtkAdjustment *adjustment, gdouble climbRate, guint digits )
+static GtkWidget* createCustomSlider( GtkAdjustment *adjustment, gdouble climbRate, guint digits, Inkscape::UI::Widget::UnitTracker *unit_tracker)
 {
 #if WITH_GTKMM_3_0
     Glib::RefPtr<Gtk::Adjustment> adj = Glib::wrap(adjustment, true);
@@ -1018,6 +1018,7 @@ static GtkWidget* createCustomSlider( GtkAdjustment *adjustment, gdouble climbRa
 #else
     Inkscape::UI::Widget::SpinButton *inkSpinner = new Inkscape::UI::Widget::SpinButton(*Glib::wrap(adjustment, true), climbRate, digits);
 #endif
+    inkSpinner->addUnitTracker(unit_tracker);
     inkSpinner = Gtk::manage( inkSpinner );
     GtkWidget *widget = GTK_WIDGET( inkSpinner->gobj() );
     return widget;
@@ -1032,6 +1033,7 @@ EgeAdjustmentAction * create_adjustment_action( gchar const *name,
                                                        gdouble lower, gdouble upper, gdouble step, gdouble page,
                                                        gchar const** descrLabels, gdouble const* descrValues, guint descrCount,
                                                        void (*callback)(GtkAdjustment *, GObject *),
+                                                       Inkscape::UI::Widget::UnitTracker *unit_tracker,
                                                        gdouble climb/* = 0.1*/, guint digits/* = 3*/, double factor/* = 1.0*/ )
 {
     static bool init = false;
@@ -1046,7 +1048,7 @@ EgeAdjustmentAction * create_adjustment_action( gchar const *name,
 
     g_signal_connect( G_OBJECT(adj), "value-changed", G_CALLBACK(callback), dataKludge );
 
-    EgeAdjustmentAction* act = ege_adjustment_action_new( adj, name, label, tooltip, 0, climb, digits );
+    EgeAdjustmentAction* act = ege_adjustment_action_new( adj, name, label, tooltip, 0, climb, digits, unit_tracker );
     if ( shortLabel ) {
         g_object_set( act, "short_label", shortLabel, NULL );
     }
diff --git a/src/widgets/toolbox.h b/src/widgets/toolbox.h
index 197f0fb5e..98cb7342e 100644
--- a/src/widgets/toolbox.h
+++ b/src/widgets/toolbox.h
@@ -28,6 +28,10 @@ struct SPEventContext;
 namespace Inkscape {
 namespace UI {
 
+namespace Widget {
+    class UnitTracker;
+}
+
 /**
  * Main toolbox source.
  */
@@ -123,6 +127,7 @@ void delete_connection(GObject * /*obj*/, sigc::connection *connection);
                                                        gdouble lower, gdouble upper, gdouble step, gdouble page,
                                                        gchar const** descrLabels, gdouble const* descrValues, guint descrCount,
                                                        void (*callback)(GtkAdjustment *, GObject *),
+                                                       Inkscape::UI::Widget::UnitTracker *unit_tracker = NULL,
                                                        gdouble climb = 0.1, guint digits = 3, double factor = 1.0 );
 
 #endif /* !SEEN_TOOLBOX_H */
diff --git a/src/widgets/tweak-toolbar.cpp b/src/widgets/tweak-toolbar.cpp
index d5fe67ef7..6da7608bd 100644
--- a/src/widgets/tweak-toolbar.cpp
+++ b/src/widgets/tweak-toolbar.cpp
@@ -144,7 +144,7 @@ void sp_tweak_toolbox_prep(SPDesktop *desktop, GtkActionGroup* mainActions, GObj
                                                               GTK_WIDGET(desktop->canvas), holder, TRUE, "altx-tweak",
                                                               1, 100, 1.0, 10.0,
                                                               labels, values, G_N_ELEMENTS(labels),
-                                                              sp_tweak_width_value_changed,  0.01, 0, 100 );
+                                                              sp_tweak_width_value_changed, NULL /*unit tracker*/, 0.01, 0, 100 );
         ege_adjustment_action_set_appearance( eact, TOOLBAR_SLIDER_HINT );
         gtk_action_group_add_action( mainActions, GTK_ACTION(eact) );
         gtk_action_set_sensitive( GTK_ACTION(eact), TRUE );
@@ -161,7 +161,7 @@ void sp_tweak_toolbox_prep(SPDesktop *desktop, GtkActionGroup* mainActions, GObj
                                                               GTK_WIDGET(desktop->canvas), holder, TRUE, "tweak-force",
                                                               1, 100, 1.0, 10.0,
                                                               labels, values, G_N_ELEMENTS(labels),
-                                                              sp_tweak_force_value_changed,  0.01, 0, 100 );
+                                                              sp_tweak_force_value_changed, NULL /*unit tracker*/, 0.01, 0, 100 );
         ege_adjustment_action_set_appearance( eact, TOOLBAR_SLIDER_HINT );
         gtk_action_group_add_action( mainActions, GTK_ACTION(eact) );
         gtk_action_set_sensitive( GTK_ACTION(eact), TRUE );
@@ -370,7 +370,7 @@ void sp_tweak_toolbox_prep(SPDesktop *desktop, GtkActionGroup* mainActions, GObj
                                                               GTK_WIDGET(desktop->canvas), holder, TRUE, "tweak-fidelity",
                                                               1, 100, 1.0, 10.0,
                                                               labels, values, G_N_ELEMENTS(labels),
-                                                              sp_tweak_fidelity_value_changed,  0.01, 0, 100 );
+                                                              sp_tweak_fidelity_value_changed, NULL /*unit tracker*/, 0.01, 0, 100 );
         gtk_action_group_add_action( mainActions, GTK_ACTION(eact) );
         gtk_action_set_sensitive( GTK_ACTION(eact), TRUE );
         if (mode == TWEAK_MODE_COLORPAINT || mode == TWEAK_MODE_COLORJITTER) {