Adding upstream version 2.10.22.upstream/2.10.22upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 932 insertions, 0 deletions

diff --git a/libgimp/gimpbrushselectbutton.c b/libgimp/gimpbrushselectbutton.c
new file mode 100644
index 0000000..0dc3d54
--- /dev/null
+++ b/libgimp/gimpbrushselectbutton.c
@@ -0,0 +1,932 @@
+/* LIBGIMP - The GIMP Library
+ * Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
+ *
+ * gimpbrushselectbutton.c
+ * Copyright (C) 1998 Andy Thomas
+ *
+ * This library is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library.  If not, see
+ * <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gegl.h>
+#include <gtk/gtk.h>
+
+#include "libgimpwidgets/gimpwidgets.h"
+
+#include "gimp.h"
+
+#include "gimpuitypes.h"
+#include "gimpbrushselectbutton.h"
+#include "gimpuimarshal.h"
+
+#include "libgimp-intl.h"
+
+
+/**
+ * SECTION: gimpbrushselectbutton
+ * @title: gimpbrushselectbutton
+ * @short_description: A button that pops up a brush selection dialog.
+ *
+ * A button that pops up a brush selection dialog.
+ **/
+
+
+#define CELL_SIZE 20
+
+
+#define GIMP_BRUSH_SELECT_BUTTON_GET_PRIVATE(obj) ((GimpBrushSelectButtonPrivate *) gimp_brush_select_button_get_instance_private ((GimpBrushSelectButton *) (obj)))
+
+typedef struct _GimpBrushSelectButtonPrivate GimpBrushSelectButtonPrivate;
+
+struct _GimpBrushSelectButtonPrivate
+{
+  gchar         *title;
+
+  gchar         *brush_name;      /* Local copy */
+  gdouble        opacity;
+  gint           spacing;
+  GimpLayerMode  paint_mode;
+  gint           width;
+  gint           height;
+  guchar        *mask_data;       /* local copy */
+
+  GtkWidget     *inside;
+  GtkWidget     *preview;
+  GtkWidget     *popup;
+};
+
+enum
+{
+  BRUSH_SET,
+  LAST_SIGNAL
+};
+
+enum
+{
+  PROP_0,
+  PROP_TITLE,
+  PROP_BRUSH_NAME,
+  PROP_BRUSH_OPACITY,
+  PROP_BRUSH_SPACING,
+  PROP_BRUSH_PAINT_MODE
+};
+
+
+/*  local function prototypes  */
+
+static void   gimp_brush_select_button_finalize     (GObject      *object);
+
+static void   gimp_brush_select_button_set_property (GObject      *object,
+                                                     guint         property_id,
+                                                     const GValue *value,
+                                                     GParamSpec   *pspec);
+static void   gimp_brush_select_button_get_property (GObject      *object,
+                                                     guint         property_id,
+                                                     GValue       *value,
+                                                     GParamSpec   *pspec);
+
+static void   gimp_brush_select_button_clicked  (GimpBrushSelectButton *button);
+
+static void   gimp_brush_select_button_callback (const gchar          *brush_name,
+                                                 gdouble               opacity,
+                                                 gint                  spacing,
+                                                 GimpLayerMode         paint_mode,
+                                                 gint                  width,
+                                                 gint                  height,
+                                                 const guchar         *mask_data,
+                                                 gboolean              dialog_closing,
+                                                 gpointer              user_data);
+
+static void     gimp_brush_select_preview_resize  (GimpBrushSelectButton *button);
+static gboolean gimp_brush_select_preview_events  (GtkWidget             *widget,
+                                                   GdkEvent              *event,
+                                                   GimpBrushSelectButton *button);
+static void     gimp_brush_select_preview_draw    (GimpPreviewArea       *area,
+                                                   gint                   x,
+                                                   gint                   y,
+                                                   gint                   width,
+                                                   gint                   height,
+                                                   const guchar          *mask_data,
+                                                   gint                   rowstride);
+static void     gimp_brush_select_preview_update  (GtkWidget             *preview,
+                                                   gint                   brush_width,
+                                                   gint                   brush_height,
+                                                   const guchar          *mask_data);
+
+static void     gimp_brush_select_button_open_popup  (GimpBrushSelectButton *button,
+                                                      gint                   x,
+                                                      gint                   y);
+static void     gimp_brush_select_button_close_popup (GimpBrushSelectButton *button);
+
+static void   gimp_brush_select_drag_data_received (GimpBrushSelectButton *button,
+                                                    GdkDragContext        *context,
+                                                    gint                   x,
+                                                    gint                   y,
+                                                    GtkSelectionData      *selection,
+                                                    guint                  info,
+                                                    guint                  time);
+
+static GtkWidget * gimp_brush_select_button_create_inside (GimpBrushSelectButton *button);
+
+
+static const GtkTargetEntry target = { "application/x-gimp-brush-name", 0 };
+
+static guint brush_button_signals[LAST_SIGNAL] = { 0 };
+
+
+G_DEFINE_TYPE_WITH_PRIVATE (GimpBrushSelectButton, gimp_brush_select_button,
+                            GIMP_TYPE_SELECT_BUTTON)
+
+
+static void
+gimp_brush_select_button_class_init (GimpBrushSelectButtonClass *klass)
+{
+  GObjectClass          *object_class        = G_OBJECT_CLASS (klass);
+  GimpSelectButtonClass *select_button_class = GIMP_SELECT_BUTTON_CLASS (klass);
+
+  object_class->finalize     = gimp_brush_select_button_finalize;
+  object_class->set_property = gimp_brush_select_button_set_property;
+  object_class->get_property = gimp_brush_select_button_get_property;
+
+  select_button_class->select_destroy = gimp_brush_select_destroy;
+
+  klass->brush_set = NULL;
+
+  /**
+   * GimpBrushSelectButton:title:
+   *
+   * The title to be used for the brush selection popup dialog.
+   *
+   * Since: 2.4
+   */
+  g_object_class_install_property (object_class, PROP_TITLE,
+                                   g_param_spec_string ("title",
+                                                        "Title",
+                                                        "The title to be used for the brush selection popup dialog",
+                                                        _("Brush Selection"),
+                                                        GIMP_PARAM_READWRITE |
+                                                        G_PARAM_CONSTRUCT_ONLY));
+
+  /**
+   * GimpBrushSelectButton:brush-name:
+   *
+   * The name of the currently selected brush.
+   *
+   * Since: 2.4
+   */
+  g_object_class_install_property (object_class, PROP_BRUSH_NAME,
+                                   g_param_spec_string ("brush-name",
+                                                        "Brush name",
+                                                        "The name of the currently selected brush",
+                                                        NULL,
+                                                        GIMP_PARAM_READWRITE));
+
+  /**
+   * GimpBrushSelectButton:opacity:
+   *
+   * The opacity of the currently selected brush.
+   *
+   * Since: 2.4
+   */
+  g_object_class_install_property (object_class, PROP_BRUSH_OPACITY,
+                                   g_param_spec_double ("brush-opacity",
+                                                        "Brush opacity",
+                                                        "The opacity of the currently selected brush",
+                                                        -1.0, 100.0, -1.0,
+                                                        GIMP_PARAM_READWRITE));
+
+  /**
+   * GimpBrushSelectButton:spacing:
+   *
+   * The spacing of the currently selected brush.
+   *
+   * Since: 2.4
+   */
+  g_object_class_install_property (object_class, PROP_BRUSH_SPACING,
+                                   g_param_spec_int ("brush-spacing",
+                                                     "Brush spacing",
+                                                     "The spacing of the currently selected brush",
+                                                     -G_MAXINT, 1000, -1,
+                                                     GIMP_PARAM_READWRITE));
+
+  /**
+   * GimpBrushSelectButton:paint-mode:
+   *
+   * The paint mode.
+   *
+   * Since: 2.4
+   */
+  g_object_class_install_property (object_class, PROP_BRUSH_PAINT_MODE,
+                                   g_param_spec_int ("brush-paint-mode",
+                                                     "Brush paint mode",
+                                                     "The paint mode of the currently selected brush",
+                                                     -1, GIMP_LAYER_MODE_LUMINANCE,
+                                                     -1,
+                                                     GIMP_PARAM_READWRITE));
+
+  /**
+   * GimpBrushSelectButton::brush-set:
+   * @widget: the object which received the signal.
+   * @brush_name: the name of the currently selected brush.
+   * @opacity: opacity of the brush
+   * @spacing: spacing of the brush
+   * @paint_mode: paint mode of the brush
+   * @width: width of the brush
+   * @height: height of the brush
+   * @mask_data: brush mask data
+   * @dialog_closing: whether the dialog was closed or not.
+   *
+   * The ::brush-set signal is emitted when the user selects a brush.
+   *
+   * Since: 2.4
+   */
+  brush_button_signals[BRUSH_SET] =
+    g_signal_new ("brush-set",
+                  G_TYPE_FROM_CLASS (klass),
+                  G_SIGNAL_RUN_FIRST,
+                  G_STRUCT_OFFSET (GimpBrushSelectButtonClass, brush_set),
+                  NULL, NULL,
+                  _gimpui_marshal_VOID__STRING_DOUBLE_INT_INT_INT_INT_POINTER_BOOLEAN,
+                  G_TYPE_NONE, 8,
+                  G_TYPE_STRING,
+                  G_TYPE_DOUBLE,
+                  G_TYPE_INT,
+                  G_TYPE_INT,
+                  G_TYPE_INT,
+                  G_TYPE_INT,
+                  G_TYPE_POINTER,
+                  G_TYPE_BOOLEAN);
+}
+
+static void
+gimp_brush_select_button_init (GimpBrushSelectButton *button)
+{
+  GimpBrushSelectButtonPrivate *priv;
+  gint                          mask_bpp;
+  gint                          mask_data_size;
+  gint                          color_bpp;
+  gint                          color_data_size;
+  guint8                       *color_data;
+
+  priv = GIMP_BRUSH_SELECT_BUTTON_GET_PRIVATE (button);
+
+  priv->brush_name = gimp_context_get_brush ();
+  gimp_brush_get_pixels (priv->brush_name,
+                         &priv->width,
+                         &priv->height,
+                         &mask_bpp,
+                         &mask_data_size,
+                         &priv->mask_data,
+                         &color_bpp,
+                         &color_data_size,
+                         &color_data);
+
+  if (color_data)
+    g_free (color_data);
+
+  priv->inside = gimp_brush_select_button_create_inside (button);
+  gtk_container_add (GTK_CONTAINER (button), priv->inside);
+
+  priv->popup = NULL;
+}
+
+/**
+ * gimp_brush_select_button_new:
+ * @title:      Title of the dialog to use or %NULL means to use the default
+ *              title.
+ * @brush_name: Initial brush name or %NULL to use current selection.
+ * @opacity:    Initial opacity. -1 means to use current opacity.
+ * @spacing:    Initial spacing. -1 means to use current spacing.
+ * @paint_mode: Initial paint mode.  -1 means to use current paint mode.
+ *
+ * Creates a new #GtkWidget that completely controls the selection of
+ * a brush. This widget is suitable for placement in a table in a
+ * plug-in dialog.
+ *
+ * Returns: A #GtkWidget that you can use in your UI.
+ *
+ * Since: 2.4
+ */
+GtkWidget *
+gimp_brush_select_button_new (const gchar   *title,
+                              const gchar   *brush_name,
+                              gdouble        opacity,
+                              gint           spacing,
+                              GimpLayerMode  paint_mode)
+{
+  GtkWidget *button;
+
+  if (title)
+    button = g_object_new (GIMP_TYPE_BRUSH_SELECT_BUTTON,
+                           "title",            title,
+                           "brush-name",       brush_name,
+                           "brush-opacity",    opacity,
+                           "brush-spacing",    spacing,
+                           "brush-paint-mode", paint_mode,
+                           NULL);
+  else
+    button = g_object_new (GIMP_TYPE_BRUSH_SELECT_BUTTON,
+                           "brush-name",       brush_name,
+                           "brush-opacity",    opacity,
+                           "brush-spacing",    spacing,
+                           "brush-paint-mode", paint_mode,
+                           NULL);
+
+  return button;
+}
+
+/**
+ * gimp_brush_select_button_get_brush:
+ * @button: A #GimpBrushSelectButton
+ * @opacity: Opacity of the selected brush.
+ * @spacing: Spacing of the selected brush.
+ * @paint_mode: Paint mode of the selected brush.
+ *
+ * Retrieves the properties of currently selected brush.
+ *
+ * Returns: an internal copy of the brush name which must not be freed.
+ *
+ * Since: 2.4
+ */
+const gchar *
+gimp_brush_select_button_get_brush (GimpBrushSelectButton *button,
+                                    gdouble               *opacity,
+                                    gint                  *spacing,
+                                    GimpLayerMode         *paint_mode)
+{
+  GimpBrushSelectButtonPrivate *priv;
+
+  g_return_val_if_fail (GIMP_IS_BRUSH_SELECT_BUTTON (button), NULL);
+
+  priv = GIMP_BRUSH_SELECT_BUTTON_GET_PRIVATE (button);
+
+  if (opacity)
+    *opacity = priv->opacity;
+
+  if (spacing)
+    *spacing = priv->spacing;
+
+  if (paint_mode)
+    *paint_mode = priv->paint_mode;
+
+  return priv->brush_name;
+}
+
+/**
+ * gimp_brush_select_button_set_brush:
+ * @button: A #GimpBrushSelectButton
+ * @brush_name: Brush name to set; %NULL means no change.
+ * @opacity:    Opacity to set. -1.0 means no change.
+ * @spacing:    Spacing to set. -1 means no change.
+ * @paint_mode: Paint mode to set.  -1 means no change.
+ *
+ * Sets the current brush and other values for the brush select
+ * button.
+ *
+ * Since: 2.4
+ */
+void
+gimp_brush_select_button_set_brush (GimpBrushSelectButton *button,
+                                    const gchar           *brush_name,
+                                    gdouble                opacity,
+                                    gint                   spacing,
+                                    GimpLayerMode          paint_mode)
+{
+  GimpSelectButton *select_button;
+
+  g_return_if_fail (GIMP_IS_BRUSH_SELECT_BUTTON (button));
+
+  select_button = GIMP_SELECT_BUTTON (button);
+
+  if (select_button->temp_callback)
+    {
+      gimp_brushes_set_popup (select_button->temp_callback, brush_name,
+                              opacity, spacing, paint_mode);
+    }
+  else
+    {
+      gchar  *name;
+      gint    width;
+      gint    height;
+      gint    bytes;
+      gint    mask_data_size;
+      guint8 *mask_data;
+      gint    color_bpp;
+      gint    color_data_size;
+      guint8 *color_data;
+
+      if (brush_name && *brush_name)
+        name = g_strdup (brush_name);
+      else
+        name = gimp_context_get_brush ();
+
+      if (gimp_brush_get_pixels (name,
+                                 &width,
+                                 &height,
+                                 &bytes,
+                                 &mask_data_size,
+                                 &mask_data,
+                                 &color_bpp,
+                                 &color_data_size,
+                                 &color_data))
+        {
+          if (color_data)
+            g_free (color_data);
+
+          if (opacity < 0.0)
+            opacity = gimp_context_get_opacity ();
+
+          if (spacing == -1)
+            gimp_brush_get_spacing (name, &spacing);
+
+          if (paint_mode == -1)
+            paint_mode = gimp_context_get_paint_mode ();
+
+          gimp_brush_select_button_callback (name,
+                                             opacity, spacing, paint_mode,
+                                             width, height, mask_data,
+                                             FALSE, button);
+
+          g_free (mask_data);
+        }
+
+      g_free (name);
+    }
+}
+
+
+/*  private functions  */
+
+static void
+gimp_brush_select_button_finalize (GObject *object)
+{
+  GimpBrushSelectButtonPrivate *priv;
+
+  priv = GIMP_BRUSH_SELECT_BUTTON_GET_PRIVATE (object);
+
+  g_clear_pointer (&priv->brush_name, g_free);
+  g_clear_pointer (&priv->mask_data,  g_free);
+  g_clear_pointer (&priv->title,      g_free);
+
+  G_OBJECT_CLASS (gimp_brush_select_button_parent_class)->finalize (object);
+}
+
+static void
+gimp_brush_select_button_set_property (GObject      *object,
+                                       guint         property_id,
+                                       const GValue *value,
+                                       GParamSpec   *pspec)
+{
+  GimpBrushSelectButton        *button = GIMP_BRUSH_SELECT_BUTTON (object);
+  GimpBrushSelectButtonPrivate *priv;
+  gdouble opacity;
+  gint32 spacing;
+  gint32 paint_mode;
+
+  priv = GIMP_BRUSH_SELECT_BUTTON_GET_PRIVATE (button);
+
+  switch (property_id)
+    {
+    case PROP_TITLE:
+      priv->title = g_value_dup_string (value);
+      break;
+    case PROP_BRUSH_NAME:
+      gimp_brush_select_button_set_brush (button,
+                                          g_value_get_string (value),
+                                          -1.0, -1, -1);
+      break;
+    case PROP_BRUSH_OPACITY:
+      opacity = g_value_get_double (value);
+      if (opacity >= 0.0)
+        priv->opacity = opacity;
+      break;
+    case PROP_BRUSH_SPACING:
+      spacing = g_value_get_int (value);
+      if (spacing != -1)
+        priv->spacing = spacing;
+      break;
+    case PROP_BRUSH_PAINT_MODE:
+      paint_mode = g_value_get_int (value);
+      if (paint_mode != -1)
+        priv->paint_mode = paint_mode;
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+      break;
+    }
+}
+
+static void
+gimp_brush_select_button_get_property (GObject    *object,
+                                       guint       property_id,
+                                       GValue     *value,
+                                       GParamSpec *pspec)
+{
+  GimpBrushSelectButton        *button = GIMP_BRUSH_SELECT_BUTTON (object);
+  GimpBrushSelectButtonPrivate *priv;
+
+  priv = GIMP_BRUSH_SELECT_BUTTON_GET_PRIVATE (button);
+
+  switch (property_id)
+    {
+    case PROP_TITLE:
+      g_value_set_string (value, priv->title);
+      break;
+    case PROP_BRUSH_NAME:
+      g_value_set_string (value, priv->brush_name);
+      break;
+    case PROP_BRUSH_OPACITY:
+      g_value_set_double (value, priv->opacity);
+      break;
+    case PROP_BRUSH_SPACING:
+      g_value_set_int (value, priv->spacing);
+      break;
+    case PROP_BRUSH_PAINT_MODE:
+      g_value_set_int (value, priv->paint_mode);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+      break;
+    }
+}
+
+static void
+gimp_brush_select_button_callback (const gchar   *name,
+                                   gdouble        opacity,
+                                   gint           spacing,
+                                   GimpLayerMode  paint_mode,
+                                   gint           width,
+                                   gint           height,
+                                   const guchar  *mask_data,
+                                   gboolean       dialog_closing,
+                                   gpointer       data)
+{
+  GimpBrushSelectButton        *button;
+  GimpBrushSelectButtonPrivate *priv;
+  GimpSelectButton             *select_button;
+
+  button = GIMP_BRUSH_SELECT_BUTTON (data);
+
+  priv = GIMP_BRUSH_SELECT_BUTTON_GET_PRIVATE (button);
+  select_button = GIMP_SELECT_BUTTON (button);
+
+  g_free (priv->brush_name);
+  g_free (priv->mask_data);
+
+  priv->brush_name = g_strdup (name);
+  priv->width      = width;
+  priv->height     = height;
+  priv->mask_data  = g_memdup (mask_data, width * height);
+  priv->opacity    = opacity;
+  priv->spacing    = spacing;
+  priv->paint_mode = paint_mode;
+
+  gimp_brush_select_preview_update (priv->preview,
+                                    width, height, mask_data);
+
+  if (dialog_closing)
+    select_button->temp_callback = NULL;
+
+  g_signal_emit (button, brush_button_signals[BRUSH_SET], 0,
+                 name, opacity, spacing, paint_mode, width, height, mask_data,
+                 dialog_closing);
+  g_object_notify (G_OBJECT (button), "brush-name");
+}
+
+static void
+gimp_brush_select_button_clicked (GimpBrushSelectButton *button)
+{
+  GimpBrushSelectButtonPrivate *priv;
+  GimpSelectButton             *select_button;
+
+  priv = GIMP_BRUSH_SELECT_BUTTON_GET_PRIVATE (button);
+  select_button = GIMP_SELECT_BUTTON (button);
+
+  if (select_button->temp_callback)
+    {
+      /*  calling gimp_brushes_set_popup() raises the dialog  */
+      gimp_brushes_set_popup (select_button->temp_callback,
+                              priv->brush_name,
+                              priv->opacity,
+                              priv->spacing,
+                              priv->paint_mode);
+    }
+  else
+    {
+      select_button->temp_callback =
+        gimp_brush_select_new (priv->title, priv->brush_name,
+                               priv->opacity, priv->spacing, priv->paint_mode,
+                               gimp_brush_select_button_callback,
+                               button);
+    }
+}
+
+static void
+gimp_brush_select_preview_resize (GimpBrushSelectButton *button)
+{
+  GimpBrushSelectButtonPrivate *priv;
+
+  priv = GIMP_BRUSH_SELECT_BUTTON_GET_PRIVATE (button);
+
+  if (priv->width > 0 && priv->height > 0)
+    gimp_brush_select_preview_update (priv->preview,
+                                      priv->width,
+                                      priv->height,
+                                      priv->mask_data);
+}
+
+static gboolean
+gimp_brush_select_preview_events (GtkWidget             *widget,
+                                  GdkEvent              *event,
+                                  GimpBrushSelectButton *button)
+{
+  GimpBrushSelectButtonPrivate *priv;
+  GdkEventButton               *bevent;
+
+  priv = GIMP_BRUSH_SELECT_BUTTON_GET_PRIVATE (button);
+
+  if (priv->mask_data)
+    {
+      switch (event->type)
+        {
+        case GDK_BUTTON_PRESS:
+          bevent = (GdkEventButton *) event;
+
+          if (bevent->button == 1)
+            {
+              gtk_grab_add (widget);
+              gimp_brush_select_button_open_popup (button,
+                                                   bevent->x, bevent->y);
+            }
+          break;
+
+        case GDK_BUTTON_RELEASE:
+          bevent = (GdkEventButton *) event;
+
+          if (bevent->button == 1)
+            {
+              gtk_grab_remove (widget);
+              gimp_brush_select_button_close_popup (button);
+            }
+          break;
+
+        default:
+          break;
+        }
+    }
+
+  return FALSE;
+}
+
+static void
+gimp_brush_select_preview_draw (GimpPreviewArea *area,
+                                gint             x,
+                                gint             y,
+                                gint             width,
+                                gint             height,
+                                const guchar    *mask_data,
+                                gint             rowstride)
+{
+  const guchar *src;
+  guchar       *dest;
+  guchar       *buf;
+  gint          i, j;
+
+  buf = g_new (guchar, width * height);
+
+  src  = mask_data;
+  dest = buf;
+
+  for (j = 0; j < height; j++)
+    {
+      const guchar *s = src;
+
+      for (i = 0; i < width; i++, s++, dest++)
+        *dest = 255 - *s;
+
+      src += rowstride;
+    }
+
+  gimp_preview_area_draw (area,
+                          x, y, width, height,
+                          GIMP_GRAY_IMAGE,
+                          buf,
+                          width);
+
+  g_free (buf);
+}
+
+static void
+gimp_brush_select_preview_update (GtkWidget    *preview,
+                                  gint          brush_width,
+                                  gint          brush_height,
+                                  const guchar *mask_data)
+{
+  GimpPreviewArea *area = GIMP_PREVIEW_AREA (preview);
+  GtkAllocation    allocation;
+  gint             x, y;
+  gint             width, height;
+
+  gtk_widget_get_allocation (preview, &allocation);
+
+  width  = MIN (brush_width,  allocation.width);
+  height = MIN (brush_height, allocation.height);
+
+  x = ((allocation.width  - width)  / 2);
+  y = ((allocation.height - height) / 2);
+
+  if (x || y)
+    gimp_preview_area_fill (area,
+                            0, 0,
+                            allocation.width,
+                            allocation.height,
+                            0xFF, 0xFF, 0xFF);
+
+  gimp_brush_select_preview_draw (area,
+                                  x, y, width, height,
+                                  mask_data, brush_width);
+}
+
+static void
+gimp_brush_select_button_open_popup (GimpBrushSelectButton *button,
+                                     gint                   x,
+                                     gint                   y)
+{
+  GimpBrushSelectButtonPrivate *priv;
+  GtkWidget                    *frame;
+  GtkWidget                    *preview;
+  GdkScreen                    *screen;
+  gint                          x_org;
+  gint                          y_org;
+  gint                          scr_w;
+  gint                          scr_h;
+
+  priv = GIMP_BRUSH_SELECT_BUTTON_GET_PRIVATE (button);
+
+  if (priv->popup)
+    gimp_brush_select_button_close_popup (button);
+
+  if (priv->width <= CELL_SIZE && priv->height <= CELL_SIZE)
+    return;
+
+  screen = gtk_widget_get_screen (GTK_WIDGET (button));
+
+  priv->popup = gtk_window_new (GTK_WINDOW_POPUP);
+  gtk_window_set_type_hint (GTK_WINDOW (priv->popup), GDK_WINDOW_TYPE_HINT_DND);
+  gtk_window_set_screen (GTK_WINDOW (priv->popup), screen);
+
+  frame = gtk_frame_new (NULL);
+  gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_OUT);
+  gtk_container_add (GTK_CONTAINER (priv->popup), frame);
+  gtk_widget_show (frame);
+
+  preview = gimp_preview_area_new ();
+  gtk_widget_set_size_request (preview, priv->width, priv->height);
+  gtk_container_add (GTK_CONTAINER (frame), preview);
+  gtk_widget_show (preview);
+
+  /* decide where to put the popup */
+  gdk_window_get_origin (gtk_widget_get_window (priv->preview),
+                         &x_org, &y_org);
+
+  scr_w = gdk_screen_get_width (screen);
+  scr_h = gdk_screen_get_height (screen);
+
+  x = x_org + x - (priv->width  / 2);
+  y = y_org + y - (priv->height / 2);
+  x = (x < 0) ? 0 : x;
+  y = (y < 0) ? 0 : y;
+  x = (x + priv->width  > scr_w) ? scr_w - priv->width  : x;
+  y = (y + priv->height > scr_h) ? scr_h - priv->height : y;
+
+  gtk_window_move (GTK_WINDOW (priv->popup), x, y);
+
+  gtk_widget_show (priv->popup);
+
+  /*  Draw the brush  */
+  gimp_brush_select_preview_draw (GIMP_PREVIEW_AREA (preview),
+                                  0, 0, priv->width, priv->height,
+                                  priv->mask_data, priv->width);
+}
+
+static void
+gimp_brush_select_button_close_popup (GimpBrushSelectButton *button)
+{
+  GimpBrushSelectButtonPrivate *priv;
+
+  priv = GIMP_BRUSH_SELECT_BUTTON_GET_PRIVATE (button);
+
+  if (priv->popup)
+    {
+      gtk_widget_destroy (priv->popup);
+      priv->popup = NULL;
+    }
+}
+
+static void
+gimp_brush_select_drag_data_received (GimpBrushSelectButton *button,
+                                      GdkDragContext        *context,
+                                      gint                   x,
+                                      gint                   y,
+                                      GtkSelectionData      *selection,
+                                      guint                  info,
+                                      guint                  time)
+{
+  gint   length = gtk_selection_data_get_length (selection);
+  gchar *str;
+
+  if (gtk_selection_data_get_format (selection) != 8 || length < 1)
+    {
+      g_warning ("%s: received invalid brush data", G_STRFUNC);
+      return;
+    }
+
+  str = g_strndup ((const gchar *) gtk_selection_data_get_data (selection),
+                   length);
+
+  if (g_utf8_validate (str, -1, NULL))
+    {
+      gint     pid;
+      gpointer unused;
+      gint     name_offset = 0;
+
+      if (sscanf (str, "%i:%p:%n", &pid, &unused, &name_offset) >= 2 &&
+          pid == gimp_getpid () && name_offset > 0)
+        {
+          gchar *name = str + name_offset;
+
+          gimp_brush_select_button_set_brush (button, name, -1.0, -1, -1);
+        }
+    }
+
+  g_free (str);
+}
+
+static GtkWidget *
+gimp_brush_select_button_create_inside (GimpBrushSelectButton *brush_button)
+{
+  GtkWidget                    *hbox;
+  GtkWidget                    *frame;
+  GtkWidget                    *button;
+  GimpBrushSelectButtonPrivate *priv;
+
+  priv = GIMP_BRUSH_SELECT_BUTTON_GET_PRIVATE (brush_button);
+
+  gtk_widget_push_composite_child ();
+
+  hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
+
+  frame = gtk_frame_new (NULL);
+  gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
+  gtk_box_pack_start (GTK_BOX (hbox), frame, FALSE, FALSE, 0);
+
+  priv->preview = gimp_preview_area_new ();
+  gtk_widget_add_events (priv->preview,
+                         GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK);
+  gtk_widget_set_size_request (priv->preview, CELL_SIZE, CELL_SIZE);
+  gtk_container_add (GTK_CONTAINER (frame), priv->preview);
+
+  g_signal_connect_swapped (priv->preview, "size-allocate",
+                            G_CALLBACK (gimp_brush_select_preview_resize),
+                            brush_button);
+  g_signal_connect (priv->preview, "event",
+                    G_CALLBACK (gimp_brush_select_preview_events),
+                    brush_button);
+
+  gtk_drag_dest_set (GTK_WIDGET (priv->preview),
+                     GTK_DEST_DEFAULT_HIGHLIGHT |
+                     GTK_DEST_DEFAULT_MOTION |
+                     GTK_DEST_DEFAULT_DROP,
+                     &target, 1,
+                     GDK_ACTION_COPY);
+
+  g_signal_connect_swapped (priv->preview, "drag-data-received",
+                            G_CALLBACK (gimp_brush_select_drag_data_received),
+                            brush_button);
+
+  button = gtk_button_new_with_mnemonic (_("_Browse..."));
+  gtk_box_pack_start (GTK_BOX (hbox), button, TRUE, TRUE, 0);
+
+  g_signal_connect_swapped (button, "clicked",
+                            G_CALLBACK (gimp_brush_select_button_clicked),
+                            brush_button);
+
+  gtk_widget_show_all (hbox);
+
+  gtk_widget_pop_composite_child ();
+
+  return hbox;
+}