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[gimp/soc-2013-n-point-deformation-tool: 21/22] app: npd-tool: show only a preview (hide the image) when the deformation is in progress

commit 966b12dbc22d17beb6e62859da5dd1c27963a51a
Author: Marek Dvoroznak <dvoromar gmail com>
Date:   Fri Sep 13 22:18:30 2013 +0200

    app: npd-tool: show only a preview (hide the image) when the deformation is in progress
    
    and show the image again when the deformation is done

 app/tools/gimpnpointdeformationoptions.c |   70 +++++++++++++++++------------
 app/tools/gimpnpointdeformationoptions.h |    1 +
 app/tools/gimpnpointdeformationtool.c    |   55 +++++++++++++++--------
 app/tools/gimpnpointdeformationtool.h    |    1 +
 4 files changed, 79 insertions(+), 48 deletions(-)
---
diff --git a/app/tools/gimpnpointdeformationoptions.c b/app/tools/gimpnpointdeformationoptions.c
index de189a0..60fccd5 100644
--- a/app/tools/gimpnpointdeformationoptions.c
+++ b/app/tools/gimpnpointdeformationoptions.c
@@ -140,9 +140,17 @@ gimp_n_point_deformation_options_set_property (GObject      *object,
         break;
       case PROP_MESH_VISIBLE:
         options->mesh_visible = g_value_get_boolean (value);
+
+        if (options->check_mesh_visible)
+          gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (options->check_mesh_visible),
+                                        options->mesh_visible);
         break;
       case PROP_PAUSE_DEFORMATION:
         options->deformation_is_paused = g_value_get_boolean (value);
+
+        if (options->check_pause_deformation)
+          gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (options->check_pause_deformation),
+                                        options->deformation_is_paused);
         break;
       default:
         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
@@ -190,41 +198,47 @@ gimp_n_point_deformation_options_get_property (GObject    *object,
 GtkWidget *
 gimp_n_point_deformation_options_gui (GimpToolOptions *tool_options)
 {
+  GimpNPointDeformationOptions *npd_options = GIMP_N_POINT_DEFORMATION_OPTIONS (tool_options);
   GObject   *config = G_OBJECT (tool_options);
   GtkWidget *vbox   = gimp_tool_options_gui (tool_options);
-  GtkWidget *combo, *scale, *check;
+  GtkWidget *widget;
+
+  widget = gtk_label_new ("Note: These options are temporary.");
+  gtk_box_pack_start (GTK_BOX (vbox), widget, FALSE, FALSE, 0);
+  gtk_widget_show (widget);
 
-  check = gimp_prop_check_button_new (config, "mesh-visible", _("Show Mesh"));
-  gtk_box_pack_start (GTK_BOX (vbox), check, FALSE, FALSE, 0);
-  gtk_widget_show (check);
+  widget = gimp_prop_check_button_new (config, "mesh-visible", _("Show Mesh"));
+  npd_options->check_mesh_visible = widget;
+  gtk_box_pack_start (GTK_BOX (vbox), widget, FALSE, FALSE, 0);
+  gtk_widget_show (widget);
 
-  scale = gimp_prop_spin_scale_new (config, "square-size", _("Square Size"), 1.0, 10.0, 0);
-  gimp_spin_scale_set_scale_limits (GIMP_SPIN_SCALE (scale), 5.0, 1000.0);
-  gtk_box_pack_start (GTK_BOX (vbox), scale, FALSE, FALSE, 0);
-  gtk_widget_show (scale);
+  widget = gimp_prop_spin_scale_new (config, "square-size", _("Square Size"), 1.0, 10.0, 0);
+  gimp_spin_scale_set_scale_limits (GIMP_SPIN_SCALE (widget), 5.0, 1000.0);
+  gtk_box_pack_start (GTK_BOX (vbox), widget, FALSE, FALSE, 0);
+  gtk_widget_show (widget);
 
-  scale = gimp_prop_spin_scale_new (config, "rigidity", _("Rigidity"), 1.0, 10.0, 0);
-  gimp_spin_scale_set_scale_limits (GIMP_SPIN_SCALE (scale), 1.0, 10000.0);
-  gtk_box_pack_start (GTK_BOX (vbox), scale, FALSE, FALSE, 0);
-  gtk_widget_show (scale);
+  widget = gimp_prop_spin_scale_new (config, "rigidity", _("Rigidity"), 1.0, 10.0, 0);
+  gimp_spin_scale_set_scale_limits (GIMP_SPIN_SCALE (widget), 1.0, 10000.0);
+  gtk_box_pack_start (GTK_BOX (vbox), widget, FALSE, FALSE, 0);
+  gtk_widget_show (widget);
 
-  combo = gimp_prop_boolean_combo_box_new (config, "ASAP-deformation", _("ASAP"), _("ARAP"));
-  gtk_box_pack_start (GTK_BOX (vbox), combo, FALSE, FALSE, 0);
-  gtk_widget_show (combo);
+  widget = gimp_prop_boolean_combo_box_new (config, "ASAP-deformation", _("ASAP"), _("ARAP"));
+  gtk_box_pack_start (GTK_BOX (vbox), widget, FALSE, FALSE, 0);
+  gtk_widget_show (widget);
 
-  combo = gimp_prop_boolean_combo_box_new (config, "MLS-weights", _("Enabled"), _("Disabled"));
-  gtk_box_pack_start (GTK_BOX (vbox), combo, FALSE, FALSE, 0);
-  gtk_widget_show (combo);
+  widget = gimp_prop_boolean_combo_box_new (config, "MLS-weights", _("Enabled"), _("Disabled"));
+  gtk_box_pack_start (GTK_BOX (vbox), widget, FALSE, FALSE, 0);
+  gtk_widget_show (widget);
 
-  scale = gimp_prop_spin_scale_new (config, "MLS-weights-alpha", _("MLS Weights Alpha"), 0.1, 0.1, 1);
-  gimp_spin_scale_set_scale_limits (GIMP_SPIN_SCALE (scale), 0.1, 2.0);
-  gtk_box_pack_start (GTK_BOX (vbox), scale, FALSE, FALSE, 0);
-  gtk_widget_show (scale);
+  widget = gimp_prop_spin_scale_new (config, "MLS-weights-alpha", _("MLS Weights Alpha"), 0.1, 0.1, 1);
+  gimp_spin_scale_set_scale_limits (GIMP_SPIN_SCALE (widget), 0.1, 2.0);
+  gtk_box_pack_start (GTK_BOX (vbox), widget, FALSE, FALSE, 0);
+  gtk_widget_show (widget);
 
-  check = gimp_prop_check_button_new (config, "pause-deformation", _("Pause Deformation"));
-  GIMP_N_POINT_DEFORMATION_OPTIONS (tool_options)->check_pause_deformation = check;
-  gtk_box_pack_start (GTK_BOX (vbox), check, FALSE, FALSE, 0);
-  gtk_widget_show (check);
+  widget = gimp_prop_check_button_new (config, "pause-deformation", _("Pause Deformation"));
+  npd_options->check_pause_deformation = widget;
+  gtk_box_pack_start (GTK_BOX (vbox), widget, FALSE, FALSE, 0);
+  gtk_widget_show (widget);
 
   return vbox;
 }
@@ -239,9 +253,7 @@ void
 gimp_n_point_deformation_options_set_pause_deformation (GimpNPointDeformationOptions *npd_options,
                                                         gboolean                      is_active)
 {
-  GtkToggleButton *check = GTK_TOGGLE_BUTTON (npd_options->check_pause_deformation);
-  gtk_toggle_button_set_active (check, is_active);
-  npd_options->deformation_is_paused = is_active;
+  g_object_set (G_OBJECT (npd_options), "pause-deformation", is_active, NULL);
 }
 
 void
diff --git a/app/tools/gimpnpointdeformationoptions.h b/app/tools/gimpnpointdeformationoptions.h
index 2cd857b..0af2cae 100644
--- a/app/tools/gimpnpointdeformationoptions.h
+++ b/app/tools/gimpnpointdeformationoptions.h
@@ -48,6 +48,7 @@ struct _GimpNPointDeformationOptions
   gboolean         deformation_is_paused;
 
   GtkWidget       *check_pause_deformation;
+  GtkWidget       *check_mesh_visible;
 };
 
 struct _GimpNPointDeformationOptionsClass
diff --git a/app/tools/gimpnpointdeformationtool.c b/app/tools/gimpnpointdeformationtool.c
index d9ed9d9..8aa3ce0 100644
--- a/app/tools/gimpnpointdeformationtool.c
+++ b/app/tools/gimpnpointdeformationtool.c
@@ -20,6 +20,7 @@
 #include "config.h"
 
 #include <gegl.h>
+#include <gegl-plugin.h>
 #include <gtk/gtk.h>
 #include <gdk/gdkkeysyms.h>
 #include <glib/gprintf.h>
@@ -29,6 +30,7 @@
 #include "tools-types.h"
 
 #include "gegl/gimp-gegl-utils.h"
+#include "gegl/gimp-gegl-apply-operation.h"
 
 #include "display/gimpdisplay.h"
 
@@ -58,7 +60,7 @@
 
 #include <npd/npd_common.h>
 
-#define GIMP_NPD_DEBUG
+//#define GIMP_NPD_DEBUG
 #define GIMP_NPD_MAXIMUM_DEFORMATION_DELAY 100000 /* 100000 microseconds == 10 FPS */
 #define GIMP_NPD_DRAW_INTERVAL                 50 /*     50 milliseconds == 20 FPS */
 #define GIMP_NPD_STRING "N-Point Deformation"
@@ -129,7 +131,7 @@ gboolean        gimp_n_point_deformation_tool_canvas_update_thread_func
                                                                       (GimpNPointDeformationTool *npd_tool);
 static void     gimp_n_point_deformation_tool_perform_deformation     (GimpNPointDeformationTool *npd_tool);
 static void     gimp_n_point_deformation_tool_halt_threads            (GimpNPointDeformationTool *npd_tool);
-GimpCanvasItem *gimp_n_point_deformation_tool_add_preview             (GimpNPointDeformationTool *npd_tool);
+static void     gimp_n_point_deformation_tool_add_preview             (GimpNPointDeformationTool *npd_tool);
 static void     gimp_n_point_deformation_tool_apply_deformation       (GimpNPointDeformationTool *npd_tool);
 
 #ifdef GIMP_NPD_DEBUG
@@ -271,12 +273,6 @@ gimp_n_point_deformation_tool_start (GimpNPointDeformationTool *npd_tool,
 
   gegl_node_link_many (source, node, sink, NULL);
 
-  /* initialize some options */
-  npd_options = GIMP_N_POINT_DEFORMATION_TOOL_GET_OPTIONS (npd_tool);
-  npd_options->mesh_visible = TRUE;
-  gimp_n_point_deformation_options_set_pause_deformation (npd_options, FALSE);
-  gimp_n_point_deformation_tool_set_options (node, npd_options);
-
   /* compute and get model */
   gegl_node_process (node);
   gegl_node_get (node, "model", &model, NULL);
@@ -294,6 +290,12 @@ gimp_n_point_deformation_tool_start (GimpNPointDeformationTool *npd_tool,
   npd_tool->selected_cps           = NULL;
   npd_tool->previous_cps_positions = NULL;
   npd_tool->rubber_band            = FALSE;
+  npd_tool->apply_deformation      = FALSE;
+
+  /* initialize some options */
+  npd_options = GIMP_N_POINT_DEFORMATION_TOOL_GET_OPTIONS (npd_tool);
+  g_object_set (G_OBJECT (npd_options), "mesh-visible", TRUE, NULL);
+  gimp_n_point_deformation_options_set_pause_deformation (npd_options, FALSE);
 
   /* get drawable's offset */
   gimp_item_get_offset (GIMP_ITEM (drawable),
@@ -305,6 +307,11 @@ gimp_n_point_deformation_tool_start (GimpNPointDeformationTool *npd_tool,
   /* start draw tool */
   gimp_draw_tool_start (draw_tool, display);
 
+  /* hide original image */
+  gimp_n_point_deformation_tool_perform_deformation (npd_tool);
+  gimp_item_set_visible (GIMP_ITEM (drawable), FALSE, FALSE);
+  gimp_image_flush (image);
+
   /* create and start a deformation thread */
   npd_tool->deform_thread =
           g_thread_new ("deform thread",
@@ -328,6 +335,18 @@ gimp_n_point_deformation_tool_halt (GimpNPointDeformationTool *npd_tool)
 
   gimp_n_point_deformation_tool_halt_threads (npd_tool);
 
+  /* apply the deformation? */
+  if (npd_tool->apply_deformation)
+    {
+      gimp_tool_control_push_preserve (tool->control, TRUE);
+      gimp_n_point_deformation_tool_apply_deformation (npd_tool);
+      gimp_tool_control_pop_preserve (tool->control);
+    }
+
+  /* show original/deformed image */
+  gimp_item_set_visible (GIMP_ITEM (npd_tool->drawable), TRUE, FALSE);
+  gimp_image_flush (gimp_display_get_image (npd_tool->display));
+
   npd_tool->active = FALSE;
 
   if (gimp_draw_tool_is_active (draw_tool))
@@ -420,12 +439,7 @@ gimp_n_point_deformation_tool_key_press (GimpTool    *tool,
     case GDK_KEY_Return:
     case GDK_KEY_KP_Enter:
     case GDK_KEY_ISO_Enter:
-      gimp_n_point_deformation_tool_halt_threads (npd_tool);
-
-      gimp_tool_control_push_preserve (tool->control, TRUE);
-      gimp_n_point_deformation_tool_apply_deformation (npd_tool);
-      gimp_tool_control_pop_preserve (tool->control);
-
+      npd_tool->apply_deformation = TRUE;
       gimp_tool_control (tool, GIMP_TOOL_ACTION_HALT, display);
       break;
 
@@ -893,8 +907,13 @@ gimp_n_point_deformation_tool_deform_thread_func (gpointer data)
 static void
 gimp_n_point_deformation_tool_perform_deformation (GimpNPointDeformationTool *npd_tool)
 {
-  gimp_npd_debug (("gegl_node_invalidated\n"));
-  gegl_node_invalidated (npd_tool->npd_node, NULL, FALSE);
+  GObject *operation = NULL;
+  g_object_get (npd_tool->npd_node,
+                "gegl-operation", &operation,
+                NULL);
+  gimp_npd_debug (("gegl_operation_invalidate\n"));
+  gegl_operation_invalidate (GEGL_OPERATION (operation), NULL, FALSE);
+//  gegl_node_invalidated (npd_tool->npd_node, NULL, FALSE);
 
   gimp_npd_debug (("gegl_node_process\n"));
   gegl_node_process (npd_tool->sink);
@@ -916,7 +935,7 @@ gimp_n_point_deformation_tool_halt_threads (GimpNPointDeformationTool *npd_tool)
   gimp_npd_debug (("finished\n"));
 }
 
-GimpCanvasItem *
+static void
 gimp_n_point_deformation_tool_add_preview  (GimpNPointDeformationTool *npd_tool)
 {
   GimpCanvasItem *item;
@@ -929,8 +948,6 @@ gimp_n_point_deformation_tool_add_preview  (GimpNPointDeformationTool *npd_tool)
 
   gimp_draw_tool_add_preview (draw_tool, item);
   g_object_unref (item);
-
-  return item;
 }
 
 static void
diff --git a/app/tools/gimpnpointdeformationtool.h b/app/tools/gimpnpointdeformationtool.h
index 5633651..992f895 100644
--- a/app/tools/gimpnpointdeformationtool.h
+++ b/app/tools/gimpnpointdeformationtool.h
@@ -79,6 +79,7 @@ struct _GimpNPointDeformationTool
   gboolean          active;
   volatile gboolean deformation_active;
   gboolean          rubber_band;
+  gboolean          apply_deformation;
 };
 
 struct _GimpNPointDeformationToolClass
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