gimp/plug-ins/file-webp/file-webp-dialog.c

/* GIMP - The GNU Image Manipulation Program
 * Copyright (C) 1995 Spencer Kimball and Peter Mattis
 *
 * file-webp - WebP file format plug-in for the GIMP
 * Copyright (C) 2015  Nathan Osman
 * Copyright (C) 2016  Ben Touchette
 *
 * 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 <libgimp/gimp.h>
#include <libgimp/gimpui.h>

#include "file-webp.h"
#include "file-webp-dialog.h"

#include "libgimp/stdplugins-intl.h"


void          save_dialog_response      (GtkWidget *widget,
                                         gint       response_id,
                                         gpointer   data);
GtkListStore * save_dialog_presets      (void);
void           save_dialog_set_preset   (GtkWidget *widget,
                                         gpointer   data);
void           save_dialog_toggle_scale (GtkWidget *widget,
                                         gpointer   data);


struct
{
  const gchar *id;
  const gchar *label;
} presets[] =
{
  { "default", "Default" },
  { "picture", "Picture" },
  { "photo",   "Photo" },
  { "drawing", "Drawing" },
  { "icon",    "Icon" },
  { "text",    "Text" },
  { 0 }
};


void
save_dialog_response (GtkWidget *widget,
                      gint       response_id,
                      gpointer   data)
{
  /* Store the response */
  *(GtkResponseType *)data = response_id;

  /* Close the dialog */
  gtk_widget_destroy (widget);
}

GtkListStore *
save_dialog_presets (void)
{
  GtkListStore *list_store;
  int           i;

  /* Create the model */
  list_store = gtk_list_store_new (2, G_TYPE_STRING, G_TYPE_STRING);

  /* Insert the entries */
  for (i = 0; presets[i].id; ++i)
    {
      gtk_list_store_insert_with_values (list_store,
                                         NULL,
                                         -1,
                                         0, presets[i].id,
                                         1, presets[i].label,
                                         -1);
    }

  return list_store;
}

void
save_dialog_set_preset (GtkWidget *widget,
                        gpointer   data)
{
  *(gchar **) data =
    gimp_string_combo_box_get_active (GIMP_STRING_COMBO_BOX (widget));
}

void
save_dialog_toggle_scale (GtkWidget *widget,
                          gpointer   data)
{
  gimp_scale_entry_set_sensitive (GTK_OBJECT (data),
                                  ! gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (widget)));
}

GtkResponseType
save_dialog (WebPSaveParams *params,
             gint32          image_ID,
             gint32          nLayers)
{
  GtkWidget       *dialog;
  GtkWidget       *vbox;
  GtkWidget       *label;
  GtkWidget       *table;
  GtkWidget       *preset_label;
  GtkListStore    *preset_list;
  GtkWidget       *preset_combo;
  GtkWidget       *lossless_checkbox;
  GtkWidget       *animation_checkbox;
  GtkWidget       *loop_anim_checkbox;
  GtkObject       *quality_scale;
  GtkObject       *alpha_quality_scale;
  GtkResponseType  response;
  gboolean         animation_supported = FALSE;
  int              slider1 , slider2;

  animation_supported = nLayers > 1;

  /* Create the dialog */
  dialog = gimp_export_dialog_new (_("WebP"),BINARY_NAME,
                                   SAVE_PROCEDURE);

  /* Store the response when the dialog is closed */
  g_signal_connect (dialog, "response",
                    G_CALLBACK (save_dialog_response),
                    &response);

  /* Quit the main loop when the dialog is closed */
  g_signal_connect (dialog, "destroy",
                    G_CALLBACK (gtk_main_quit),
                    NULL);

  /* Create the vbox */
  vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 6);
  gtk_container_set_border_width (GTK_CONTAINER (vbox), 6);
  gtk_box_pack_start (GTK_BOX (gimp_export_dialog_get_content_area (dialog)),
                      vbox, FALSE, FALSE, 0);
  gtk_widget_show (vbox);

  /* Create the descriptive label at the top */
  label = gtk_label_new (_("Use the options below to customize the image."));
  gtk_box_pack_start (GTK_BOX (vbox), label, FALSE, FALSE, 0);
  gtk_widget_show (label);

  /* Create the table */
  table = gtk_table_new (4, 5, FALSE);
  gtk_table_set_row_spacings (GTK_TABLE (table), 6);
  gtk_table_set_col_spacings (GTK_TABLE (table), 6);
  gtk_box_pack_start (GTK_BOX (vbox), table, FALSE, FALSE, 0);
  gtk_widget_show (table);

  /* Create the label for the selecting a preset */
  preset_label = gtk_label_new (_("Preset:"));
  gtk_table_attach (GTK_TABLE (table), preset_label,
                    0, 1, 0, 1,
                    0, 0, 0, 0);
  gtk_widget_show (preset_label);

  /* Create the combobox containing the presets */
  preset_list = save_dialog_presets ();
  preset_combo = gimp_string_combo_box_new (GTK_TREE_MODEL (preset_list), 0, 1);
  g_object_unref (preset_list);

  gimp_string_combo_box_set_active (GIMP_STRING_COMBO_BOX (preset_combo),
                                    params->preset);
  gtk_table_attach (GTK_TABLE (table), preset_combo,
                    1, 3, 0, 1,
                    GTK_FILL, GTK_FILL, 0, 0);
  gtk_widget_show (preset_combo);

  g_signal_connect (preset_combo, "changed",
                    G_CALLBACK (save_dialog_set_preset),
                    &params->preset);

  /* Create the lossless checkbox */
  lossless_checkbox = gtk_check_button_new_with_label (_("Lossless"));
  gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (lossless_checkbox),
                                params->lossless);
  gtk_table_attach (GTK_TABLE (table), lossless_checkbox,
                    1, 3, 1, 2,
                   GTK_FILL, GTK_FILL, 0, 0);
  gtk_widget_show (lossless_checkbox);

  g_signal_connect (lossless_checkbox, "toggled",
                    G_CALLBACK (gimp_toggle_button_update),
                    &params->lossless);

  slider1 = 2;
  slider2 = 3;
  if (animation_supported)
    {
      slider1 = 4;
      slider2 = 5;

      /* Create the animation checkbox */
      animation_checkbox = gtk_check_button_new_with_label (_("Use animation"));
      gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (animation_checkbox),
                                    params->animation);
      gtk_table_attach (GTK_TABLE (table), animation_checkbox,
                        1, 3, 2, 3,
                        GTK_FILL, GTK_FILL, 0, 0);
      gtk_widget_show (animation_checkbox);

      g_signal_connect (animation_checkbox, "toggled",
                        G_CALLBACK (gimp_toggle_button_update),
                        &params->animation);

      /* Create the loop animation checkbox */
      loop_anim_checkbox = gtk_check_button_new_with_label (_("Loop infinitely"));
      gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (loop_anim_checkbox),
                                    params->loop);
      gtk_table_attach (GTK_TABLE (table), loop_anim_checkbox,
                        1, 3, 3, 4,
                        GTK_FILL, GTK_FILL, 0, 0);
      gtk_widget_show (loop_anim_checkbox);

      g_signal_connect (loop_anim_checkbox, "toggled",
                        G_CALLBACK (gimp_toggle_button_update),
                        &params->loop);
    }

  /* Create the slider for image quality */
  quality_scale = gimp_scale_entry_new (GTK_TABLE (table),
                                        0, slider1,
                                        _("Image quality:"),
                                        125,
                                        0,
                                        params->quality,
                                        0.0, 100.0,
                                        1.0, 10.0,
                                        0, TRUE,
                                        0.0, 0.0,
                                        _("Image quality"),
                                        NULL);
  gimp_scale_entry_set_sensitive (quality_scale, ! params->lossless);

  g_signal_connect (quality_scale, "value-changed",
                    G_CALLBACK (gimp_float_adjustment_update),
                    &params->quality);

  /* Create the slider for alpha channel quality */
  alpha_quality_scale = gimp_scale_entry_new (GTK_TABLE (table),
                                              0, slider2,
                                              _("Alpha quality:"),
                                              125,
                                              0,
                                              params->alpha_quality,
                                              0.0, 100.0,
                                              1.0, 10.0,
                                              0, TRUE,
                                              0.0, 0.0,
                                              _("Alpha channel quality"),
                                              NULL);
  gimp_scale_entry_set_sensitive (alpha_quality_scale, ! params->lossless);

  g_signal_connect (alpha_quality_scale, "value-changed",
                    G_CALLBACK (gimp_float_adjustment_update),
                    &params->alpha_quality);

  /* Enable and disable the sliders when the lossless option is selected */
  g_signal_connect (lossless_checkbox, "toggled",
                    G_CALLBACK (save_dialog_toggle_scale),
                    quality_scale);
  g_signal_connect (lossless_checkbox, "toggled",
                    G_CALLBACK (save_dialog_toggle_scale),
                    alpha_quality_scale);

  /* Display the dialog and enter the main event loop */
  gtk_widget_show (dialog);
  gtk_main ();

  return response;
}