[gimp/wip/gradient-edit: 25/42] app: add "instant mode" option to the blend tool

[N/A <ell src gnome org>]

commit 7af8596aacaf92b91b50fb94d329566969fcd40b
Author: Ell <ell_se yahoo com>
Date:   Tue Aug 1 08:14:10 2017 -0400

    app: add "instant mode" option to the blend tool
    
    Add a boolean "instant mode" option to the blend tool, togglable
    using shift.  When checked, commit the gradient immediately when
    the mouse is released.
    
    When not in instant mode, don't commit the gradient when clicking
    outside the line, since this will become easy to do accidentally
    once we add on-canvas gradient editing.

 app/tools/gimpblendoptions.c |   50 ++++++++++++++++++++----
 app/tools/gimpblendoptions.h |    5 ++
 app/tools/gimpblendtool.c    |   88 ++++++++++++++++++++++++++++++------------
 3 files changed, 110 insertions(+), 33 deletions(-)
---
diff --git a/app/tools/gimpblendoptions.c b/app/tools/gimpblendoptions.c
index 7b23856..6f8f631 100644
--- a/app/tools/gimpblendoptions.c
+++ b/app/tools/gimpblendoptions.c
@@ -29,6 +29,7 @@
 
 #include "widgets/gimppropwidgets.h"
 #include "widgets/gimpviewablebox.h"
+#include "widgets/gimpwidgets-utils.h"
 
 #include "gimpblendoptions.h"
 #include "gimppaintoptions-gui.h"
@@ -45,7 +46,8 @@ enum
   PROP_SUPERSAMPLE,
   PROP_SUPERSAMPLE_DEPTH,
   PROP_SUPERSAMPLE_THRESHOLD,
-  PROP_DITHER
+  PROP_DITHER,
+  PROP_INSTANT
 };
 
 
@@ -120,6 +122,13 @@ gimp_blend_options_class_init (GimpBlendOptionsClass *klass)
                             NULL,
                             TRUE,
                             GIMP_PARAM_STATIC_STRINGS);
+
+  GIMP_CONFIG_PROP_BOOLEAN (object_class, PROP_INSTANT,
+                            "instant",
+                            _("Instant mode"),
+                            _("Commit gradient instantly"),
+                            FALSE,
+                            GIMP_PARAM_STATIC_STRINGS);
 }
 
 static void
@@ -162,6 +171,10 @@ gimp_blend_options_set_property (GObject      *object,
       options->dither = g_value_get_boolean (value);
       break;
 
+    case PROP_INSTANT:
+      options->instant = g_value_get_boolean (value);
+      break;
+
     default:
       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
       break;
@@ -203,6 +216,10 @@ gimp_blend_options_get_property (GObject    *object,
       g_value_set_boolean (value, options->dither);
       break;
 
+    case PROP_INSTANT:
+      g_value_set_boolean (value, options->instant);
+      break;
+
     default:
       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
       break;
@@ -212,13 +229,18 @@ gimp_blend_options_get_property (GObject    *object,
 GtkWidget *
 gimp_blend_options_gui (GimpToolOptions *tool_options)
 {
-  GObject   *config = G_OBJECT (tool_options);
-  GtkWidget *vbox   = gimp_paint_options_gui (tool_options);
-  GtkWidget *vbox2;
-  GtkWidget *frame;
-  GtkWidget *scale;
-  GtkWidget *combo;
-  GtkWidget *button;
+  GObject          *config  = G_OBJECT (tool_options);
+  GimpBlendOptions *options = GIMP_BLEND_OPTIONS (tool_options);
+  GtkWidget        *vbox    = gimp_paint_options_gui (tool_options);
+  GtkWidget        *vbox2;
+  GtkWidget        *frame;
+  GtkWidget        *scale;
+  GtkWidget        *combo;
+  GtkWidget        *button;
+  gchar            *str;
+  GdkModifierType   extend_mask;
+
+  extend_mask = gimp_get_extend_selection_mask ();
 
   /*  the gradient  */
   button = gimp_prop_gradient_box_new (NULL, GIMP_CONTEXT (tool_options),
@@ -281,6 +303,18 @@ gimp_blend_options_gui (GimpToolOptions *tool_options)
   gtk_box_pack_start (GTK_BOX (vbox2), scale, FALSE, FALSE, 0);
   gtk_widget_show (scale);
 
+  /* the instant toggle */
+  str = g_strdup_printf (_("Instant mode  (%s)"),
+                          gimp_get_mod_string (extend_mask));
+
+  button = gimp_prop_check_button_new (config, "instant", str);
+  gtk_box_pack_start (GTK_BOX (vbox), button, FALSE, FALSE, 0);
+  gtk_widget_show (button);
+
+  g_free (str);
+
+  options->instant_toggle = button;
+
   return vbox;
 }
 
diff --git a/app/tools/gimpblendoptions.h b/app/tools/gimpblendoptions.h
index 683365c..092b2ad 100644
--- a/app/tools/gimpblendoptions.h
+++ b/app/tools/gimpblendoptions.h
@@ -45,6 +45,11 @@ struct _GimpBlendOptions
   gdouble           supersample_threshold;
 
   gboolean          dither;
+
+  gboolean          instant;
+
+  /*  options gui  */
+  GtkWidget        *instant_toggle;
 };
 
 
diff --git a/app/tools/gimpblendtool.c b/app/tools/gimpblendtool.c
index 35b8363..3b1343d 100644
--- a/app/tools/gimpblendtool.c
+++ b/app/tools/gimpblendtool.c
@@ -90,6 +90,11 @@ static void   gimp_blend_tool_motion              (GimpTool              *tool,
                                                    guint32                time,
                                                    GdkModifierType        state,
                                                    GimpDisplay           *display);
+static void   gimp_blend_tool_modifier_key        (GimpTool              *tool,
+                                                   GdkModifierType        key,
+                                                   gboolean               press,
+                                                   GdkModifierType        state,
+                                                   GimpDisplay           *display);
 static void   gimp_blend_tool_cursor_update       (GimpTool              *tool,
                                                    const GimpCoords      *coords,
                                                    GdkModifierType        state,
@@ -180,6 +185,7 @@ gimp_blend_tool_class_init (GimpBlendToolClass *klass)
   tool_class->button_press   = gimp_blend_tool_button_press;
   tool_class->button_release = gimp_blend_tool_button_release;
   tool_class->motion         = gimp_blend_tool_motion;
+  tool_class->modifier_key   = gimp_blend_tool_modifier_key;
   tool_class->cursor_update  = gimp_blend_tool_cursor_update;
   tool_class->can_undo       = gimp_blend_tool_can_undo;
   tool_class->can_redo       = gimp_blend_tool_can_redo;
@@ -346,7 +352,8 @@ gimp_blend_tool_button_release (GimpTool              *tool,
                                 GimpButtonReleaseType  release_type,
                                 GimpDisplay           *display)
 {
-  GimpBlendTool *blend_tool = GIMP_BLEND_TOOL (tool);
+  GimpBlendTool    *blend_tool = GIMP_BLEND_TOOL (tool);
+  GimpBlendOptions *options    = GIMP_BLEND_TOOL_GET_OPTIONS (tool);
 
   gimp_tool_pop_status (tool, display);
 
@@ -358,36 +365,39 @@ gimp_blend_tool_button_release (GimpTool              *tool,
                                        coords, time, state, release_type);
       blend_tool->grab_widget = NULL;
 
-      if (release_type == GIMP_BUTTON_RELEASE_CANCEL)
+      if (options->instant)
         {
-          /*  simply destroy the undo step we pushed in button_press(),
-           *  the tool widget restored the old position by itself
-           */
-          blend_info_free (blend_tool->undo_stack->data);
-          blend_tool->undo_stack = g_list_remove (blend_tool->undo_stack,
-                                                  blend_tool->undo_stack->data);
+          if (release_type == GIMP_BUTTON_RELEASE_CANCEL)
+            gimp_tool_control (tool, GIMP_TOOL_ACTION_HALT, display);
+          else
+            gimp_tool_control (tool, GIMP_TOOL_ACTION_COMMIT, display);
         }
       else
         {
-          /*  blow the redo stack, we had an actual undoable movement
-           */
-          if (blend_tool->redo_stack)
+          if (release_type == GIMP_BUTTON_RELEASE_CANCEL)
             {
-              g_list_free_full (blend_tool->redo_stack,
-                                (GDestroyNotify) blend_info_free);
-              blend_tool->redo_stack = NULL;
+              /*  simply destroy the undo step we pushed in button_press(),
+               *  the tool widget restored the old position by itself
+               */
+              blend_info_free (blend_tool->undo_stack->data);
+              blend_tool->undo_stack = g_list_remove (blend_tool->undo_stack,
+                                                      blend_tool->undo_stack->data);
+            }
+          else
+            {
+              /*  blow the redo stack, we had an actual undoable movement
+               */
+              if (blend_tool->redo_stack)
+                {
+                  g_list_free_full (blend_tool->redo_stack,
+                                    (GDestroyNotify) blend_info_free);
+                  blend_tool->redo_stack = NULL;
+                }
             }
-        }
 
-      /*  update the undo actions / menu items  */
-      gimp_image_flush (gimp_display_get_image (display));
-    }
-  else if (release_type == GIMP_BUTTON_RELEASE_CLICK ||
-           release_type == GIMP_BUTTON_RELEASE_NO_MOTION)
-    {
-      /*  a click outside any handle commits the tool
-       */
-      gimp_tool_control (tool, GIMP_TOOL_ACTION_COMMIT, display);
+          /*  update the undo actions / menu items  */
+          gimp_image_flush (gimp_display_get_image (display));
+        }
     }
 }
 
@@ -407,6 +417,27 @@ gimp_blend_tool_motion (GimpTool         *tool,
 }
 
 static void
+gimp_blend_tool_modifier_key (GimpTool        *tool,
+                              GdkModifierType  key,
+                              gboolean         press,
+                              GdkModifierType  state,
+                              GimpDisplay     *display)
+{
+  GimpBlendOptions *options = GIMP_BLEND_TOOL_GET_OPTIONS (tool);
+
+  if (key == gimp_get_extend_selection_mask ())
+    {
+      if (options->instant_toggle &&
+          gtk_widget_get_sensitive (options->instant_toggle))
+        {
+          g_object_set (options,
+                        "instant", ! options->instant,
+                        NULL);
+        }
+    }
+}
+
+static void
 gimp_blend_tool_cursor_update (GimpTool         *tool,
                                const GimpCoords *coords,
                                GdkModifierType   state,
@@ -576,6 +607,9 @@ gimp_blend_tool_start (GimpBlendTool    *blend_tool,
   GimpBlendOptions *options  = GIMP_BLEND_TOOL_GET_OPTIONS (blend_tool);
   GimpContext      *context  = GIMP_CONTEXT (options);
 
+  if (options->instant_toggle)
+    gtk_widget_set_sensitive (options->instant_toggle, FALSE);
+
   tool->display  = display;
   tool->drawable = drawable;
 
@@ -621,7 +655,8 @@ gimp_blend_tool_start (GimpBlendTool    *blend_tool,
 static void
 gimp_blend_tool_halt (GimpBlendTool *blend_tool)
 {
-  GimpTool *tool = GIMP_TOOL (blend_tool);
+  GimpTool         *tool    = GIMP_TOOL (blend_tool);
+  GimpBlendOptions *options = GIMP_BLEND_TOOL_GET_OPTIONS (blend_tool);
 
   if (blend_tool->graph)
     {
@@ -674,6 +709,9 @@ gimp_blend_tool_halt (GimpBlendTool *blend_tool)
 
   tool->display  = NULL;
   tool->drawable = NULL;
+
+  if (options->instant_toggle)
+    gtk_widget_set_sensitive (options->instant_toggle, TRUE);
 }
 
 static void