/* GIMP - The GNU Image Manipulation Program
 * Copyright (C) 1995 Spencer Kimball and Peter Mattis
 *
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "config.h"

#include <gtk/gtk.h>

#include "libgimpconfig/gimpconfig.h"
#include "libgimpwidgets/gimpwidgets.h"

#include "widgets-types.h"

#include "core/gimp.h"
#include "core/gimpcontext.h"
#include "core/gimpdynamics.h"

#include "gimpdocked.h"
#include "gimpdynamicseditor.h"
#include "gimpmenufactory.h"
#include "gimppropwidgets.h"

#include "gimp-intl.h"


/*  local function prototypes  */

static GObject * gimp_dynamics_editor_constructor  (GType              type,
                                                    guint              n_params,
                                                    GObjectConstructParam *params);

static void   gimp_dynamics_editor_set_data        (GimpDataEditor     *editor,
                                                    GimpData           *data);

static void   gimp_dynamics_editor_notify_model    (GimpDynamics       *options,
                                                    const GParamSpec   *pspec,
                                                    GimpDynamicsEditor *editor);
static void   gimp_dynamics_editor_notify_data     (GimpDynamics       *options,
                                                    const GParamSpec   *pspec,
                                                    GimpDynamicsEditor *editor);

static void   gimp_dynamics_editor_add_output_row  (GObject     *config,
                                                    const gchar *row_label,
                                                    GtkTable    *table,
                                                    gint         row,
                                                    GtkWidget   *labels[]);

static GtkWidget * dynamics_check_button_new       (GObject     *config,
                                                    const gchar *property_name,
                                                    GtkTable    *table,
                                                    gint         column,
                                                    gint         row);


static void    dynamics_check_button_size_allocate (GtkWidget     *toggle,
                                                    GtkAllocation *allocation,
                                                    GtkWidget     *label);


G_DEFINE_TYPE_WITH_CODE (GimpDynamicsEditor, gimp_dynamics_editor,
                         GIMP_TYPE_DATA_EDITOR,
                         G_IMPLEMENT_INTERFACE (GIMP_TYPE_DOCKED, NULL))

#define parent_class gimp_dynamics_editor_parent_class


static void
gimp_dynamics_editor_class_init (GimpDynamicsEditorClass *klass)
{
  GObjectClass        *object_class = G_OBJECT_CLASS (klass);
  GimpDataEditorClass *editor_class = GIMP_DATA_EDITOR_CLASS (klass);

  object_class->constructor = gimp_dynamics_editor_constructor;

  editor_class->set_data    = gimp_dynamics_editor_set_data;
  editor_class->title       = _("Paint Dynamics Editor");
}

static void
gimp_dynamics_editor_init (GimpDynamicsEditor *editor)
{
  GimpDataEditor *data_editor = GIMP_DATA_EDITOR (editor);
  GimpDynamics   *dynamics;
  GtkWidget      *fixed;
  GtkWidget      *input_labels[6];
  gint            n_inputs = G_N_ELEMENTS (input_labels);
  gint            i;

  dynamics = editor->dynamics_model = g_object_new (GIMP_TYPE_DYNAMICS, NULL);

  g_signal_connect (dynamics, "notify",
                    G_CALLBACK (gimp_dynamics_editor_notify_model),
                    editor);

  editor->table = gtk_table_new (10, n_inputs + 2, FALSE);
  gtk_box_pack_start (GTK_BOX (data_editor), editor->table, TRUE, TRUE, 0);
  gtk_widget_show (editor->table);

  input_labels[0] = gtk_label_new (_("Pressure"));
  input_labels[1] = gtk_label_new (_("Velocity"));
  input_labels[2] = gtk_label_new (_("Direction"));
  input_labels[3] = gtk_label_new (_("Tilt"));
  input_labels[4] = gtk_label_new (_("Random"));
  input_labels[5] = gtk_label_new (_("Fade"));

  gimp_dynamics_editor_add_output_row (G_OBJECT (dynamics->opacity_output),
                                       _("Opacity"),
                                       GTK_TABLE (editor->table),
                                       1, input_labels);

  gimp_dynamics_editor_add_output_row (G_OBJECT (dynamics->hardness_output),
                                       _("Hardness"),
                                       GTK_TABLE (editor->table),
                                       2, NULL);

  gimp_dynamics_editor_add_output_row (G_OBJECT (dynamics->rate_output),
                                       _("Rate"),
                                       GTK_TABLE (editor->table),
                                       3, NULL);

  gimp_dynamics_editor_add_output_row (G_OBJECT (dynamics->size_output),
                                       _("Size"),
                                       GTK_TABLE (editor->table),
                                       4, NULL);

  gimp_dynamics_editor_add_output_row (G_OBJECT (dynamics->aspect_ratio_output),
                                       _("Aspect ratio"),
                                       GTK_TABLE (editor->table),
                                       5, NULL);

  gimp_dynamics_editor_add_output_row (G_OBJECT (dynamics->color_output),
                                       _("Color"),
                                       GTK_TABLE (editor->table),
                                       6, NULL);

  gimp_dynamics_editor_add_output_row (G_OBJECT (dynamics->angle_output),
                                       _("Angle"),
                                       GTK_TABLE (editor->table),
                                       7, NULL);

  gimp_dynamics_editor_add_output_row (G_OBJECT (dynamics->jitter_output),
                                       _("Jitter"),
                                       GTK_TABLE (editor->table),
                                       8, NULL);

  gimp_dynamics_editor_add_output_row (G_OBJECT (dynamics->spacing_output),
                                       _("Spacing"),
                                       GTK_TABLE (editor->table),
                                       9, NULL);
  fixed = gtk_fixed_new ();
  gtk_table_attach (GTK_TABLE (editor->table), fixed, 0, n_inputs + 2, 0, 1,
                    GTK_SHRINK | GTK_FILL, GTK_SHRINK | GTK_FILL, 0, 0);
  gtk_widget_show (fixed);

  for (i = 0; i < n_inputs; i++)
    {
      gtk_label_set_angle (GTK_LABEL (input_labels[i]),
                           90);
      gtk_misc_set_alignment (GTK_MISC (input_labels[i]), 1.0, 1.0);
      gtk_fixed_put (GTK_FIXED (fixed), input_labels[i], 0, 0);
      gtk_widget_show (input_labels[i]);
    }
}

static GObject *
gimp_dynamics_editor_constructor (GType                  type,
                                  guint                  n_params,
                                  GObjectConstructParam *params)
{
  GObject *object;

  object = G_OBJECT_CLASS (parent_class)->constructor (type, n_params, params);

  gimp_docked_set_show_button_bar (GIMP_DOCKED (object), FALSE);

  return object;
}

static void
gimp_dynamics_editor_set_data (GimpDataEditor *editor,
                               GimpData       *data)
{
  GimpDynamicsEditor *dynamics_editor = GIMP_DYNAMICS_EDITOR (editor);

  if (editor->data)
    g_signal_handlers_disconnect_by_func (editor->data,
                                          gimp_dynamics_editor_notify_data,
                                          editor);

  GIMP_DATA_EDITOR_CLASS (parent_class)->set_data (editor, data);

  if (editor->data)
    {
      g_signal_handlers_block_by_func (dynamics_editor->dynamics_model,
                                       gimp_dynamics_editor_notify_model,
                                       editor);

      gimp_config_copy (GIMP_CONFIG (editor->data),
                        GIMP_CONFIG (dynamics_editor->dynamics_model),
                        GIMP_CONFIG_PARAM_SERIALIZE);

      g_signal_handlers_unblock_by_func (dynamics_editor->dynamics_model,
                                         gimp_dynamics_editor_notify_model,
                                         editor);

      g_signal_connect (editor->data, "notify",
                        G_CALLBACK (gimp_dynamics_editor_notify_data),
                        editor);
    }

  gtk_widget_set_sensitive (dynamics_editor->table,
                            editor->data_editable);
}


/*  public functions  */

GtkWidget *
gimp_dynamics_editor_new (GimpContext     *context,
                          GimpMenuFactory *menu_factory)
{
  g_return_val_if_fail (GIMP_IS_MENU_FACTORY (menu_factory), NULL);
  g_return_val_if_fail (GIMP_IS_CONTEXT (context), NULL);

  return g_object_new (GIMP_TYPE_DYNAMICS_EDITOR,
                       "menu-factory",    menu_factory,
                       "menu-identifier", "<DynamicsEditor>",
                       "ui-path",         "/dynamics-editor-popup",
                       "data-factory",    context->gimp->dynamics_factory,
                       "context",         context,
                       "data",            gimp_context_get_dynamics (context),
                       NULL);
}


/*  private functions  */

static void
gimp_dynamics_editor_notify_model (GimpDynamics       *options,
                                   const GParamSpec   *pspec,
                                   GimpDynamicsEditor *editor)
{
  GimpDataEditor *data_editor = GIMP_DATA_EDITOR (editor);

  if (data_editor->data)
    {
      g_signal_handlers_block_by_func (data_editor->data,
                                       gimp_dynamics_editor_notify_data,
                                       editor);

      gimp_config_copy (GIMP_CONFIG (editor->dynamics_model),
                        GIMP_CONFIG (data_editor->data),
                        GIMP_CONFIG_PARAM_SERIALIZE);

      g_signal_handlers_unblock_by_func (data_editor->data,
                                         gimp_dynamics_editor_notify_data,
                                         editor);
    }
}

static void
gimp_dynamics_editor_notify_data (GimpDynamics       *options,
                                  const GParamSpec   *pspec,
                                  GimpDynamicsEditor *editor)
{
  GimpDataEditor *data_editor = GIMP_DATA_EDITOR (editor);

  g_signal_handlers_block_by_func (editor->dynamics_model,
                                   gimp_dynamics_editor_notify_model,
                                   editor);

  gimp_config_copy (GIMP_CONFIG (data_editor->data),
                    GIMP_CONFIG (editor->dynamics_model),
                    GIMP_CONFIG_PARAM_SERIALIZE);

  g_signal_handlers_unblock_by_func (editor->dynamics_model,
                                     gimp_dynamics_editor_notify_model,
                                     editor);
}

static void
gimp_dynamics_editor_add_output_row (GObject     *config,
                                     const gchar *row_label,
                                     GtkTable    *table,
                                     gint         row,
                                     GtkWidget   *labels[])
{
  GtkWidget *label;
  GtkWidget *button;
  gint       column = 1;

  label = gtk_label_new (row_label);
  gtk_misc_set_alignment (GTK_MISC (label), 0.0, 0.5);
  gtk_table_attach (GTK_TABLE (table), label, 0, 1, row, row + 1,
                    GTK_SHRINK | GTK_FILL, GTK_SHRINK | GTK_FILL, 0, 0);
  gtk_widget_show (label);

  button = dynamics_check_button_new (config, "use-pressure",
                                      table, column, row);
  if (labels)
    g_signal_connect (button, "size-allocate",
                      G_CALLBACK (dynamics_check_button_size_allocate),
                      labels[column - 1]);
  column++;

  button = dynamics_check_button_new (config, "use-velocity",
                                      table, column, row);
  if (labels)
    g_signal_connect (button, "size-allocate",
                      G_CALLBACK (dynamics_check_button_size_allocate),
                      labels[column - 1]);
  column++;

  button = dynamics_check_button_new (config, "use-direction",
                                      table, column, row);
  if (labels)
    g_signal_connect (button, "size-allocate",
                      G_CALLBACK (dynamics_check_button_size_allocate),
                      labels[column - 1]);
  column++;

  button = dynamics_check_button_new (config,  "use-tilt",
                                      table, column, row);
  if (labels)
    g_signal_connect (button, "size-allocate",
                      G_CALLBACK (dynamics_check_button_size_allocate),
                      labels[column - 1]);
  column++;

  button = dynamics_check_button_new (config, "use-random",
                                      table, column, row);
  if (labels)
    g_signal_connect (button, "size-allocate",
                      G_CALLBACK (dynamics_check_button_size_allocate),
                      labels[column - 1]);
  column++;

  button = dynamics_check_button_new (config, "use-fade",
                                      table, column, row);
  if (labels)
    g_signal_connect (button, "size-allocate",
                      G_CALLBACK (dynamics_check_button_size_allocate),
                      labels[column - 1]);
  column++;
}

static GtkWidget *
dynamics_check_button_new (GObject     *config,
                           const gchar *property_name,
                           GtkTable    *table,
                           gint         column,
                           gint         row)
{
  GtkWidget *button;

  button = gimp_prop_check_button_new (config, property_name, NULL);
  gtk_table_attach (table, button, column, column + 1, row, row + 1,
                    GTK_SHRINK, GTK_SHRINK, 0, 0);
  gtk_widget_show (button);

  return button;
}

static void
dynamics_check_button_size_allocate (GtkWidget     *toggle,
                                     GtkAllocation *allocation,
                                     GtkWidget     *label)
{
  GtkWidget     *fixed = gtk_widget_get_parent (label);
  GtkAllocation  label_allocation;
  GtkAllocation  fixed_allocation;
  gint           x, y;

  gtk_widget_get_allocation (label, &label_allocation);
  gtk_widget_get_allocation (fixed, &fixed_allocation);

  if (gtk_widget_get_direction (label) == GTK_TEXT_DIR_LTR)
    x = allocation->x;
  else
    x = allocation->x + allocation->width - label_allocation.width;

  x -= fixed_allocation.x;

  y = fixed_allocation.height - label_allocation.height;

  gtk_fixed_move (GTK_FIXED (fixed), label, x, y);
}