gtkfilechooserdialog.c 20.8 KB
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/* GTK - The GIMP Toolkit
 * gtkfilechooserdialog.c: File selector dialog
 * Copyright (C) 2003, Red Hat, Inc.
 *
 * 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 2 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
 * Lesser 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, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

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#include <config.h>
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#include "gtkfilechooserdialog.h"
#include "gtkfilechooserwidget.h"
#include "gtkfilechooserutils.h"
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#include "gtkfilechooserembed.h"
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#include "gtkfilesystem.h"
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#include "gtktypebuiltins.h"
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#include "gtkintl.h"
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#include "gtkalias.h"
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#include <stdarg.h>

struct _GtkFileChooserDialogPrivate
{
  GtkWidget *widget;
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  char *file_system;
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  /* for use with GtkFileChooserEmbed */
  gint default_width;
  gint default_height;
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  gboolean resize_horizontally;
  gboolean resize_vertically;
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};

#define GTK_FILE_CHOOSER_DIALOG_GET_PRIVATE(o)  (GTK_FILE_CHOOSER_DIALOG (o)->priv)

static void gtk_file_chooser_dialog_class_init (GtkFileChooserDialogClass *class);
static void gtk_file_chooser_dialog_init       (GtkFileChooserDialog      *dialog);
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static void gtk_file_chooser_dialog_finalize   (GObject                   *object);
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static GObject* gtk_file_chooser_dialog_constructor  (GType                  type,
						      guint                  n_construct_properties,
						      GObjectConstructParam *construct_params);
static void     gtk_file_chooser_dialog_set_property (GObject               *object,
						      guint                  prop_id,
						      const GValue          *value,
						      GParamSpec            *pspec);
static void     gtk_file_chooser_dialog_get_property (GObject               *object,
						      guint                  prop_id,
						      GValue                *value,
						      GParamSpec            *pspec);

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static void     gtk_file_chooser_dialog_map          (GtkWidget             *widget);
static void     gtk_file_chooser_dialog_unmap        (GtkWidget             *widget);
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static void     gtk_file_chooser_dialog_style_set    (GtkWidget             *widget,
						      GtkStyle              *previous_style);
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static void response_cb (GtkDialog *dialog,
			 gint       response_id);

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static GObjectClass *parent_class;
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GType
gtk_file_chooser_dialog_get_type (void)
{
  static GType file_chooser_dialog_type = 0;

  if (!file_chooser_dialog_type)
    {
      static const GTypeInfo file_chooser_dialog_info =
      {
	sizeof (GtkFileChooserDialogClass),
	NULL,		/* base_init */
	NULL,		/* base_finalize */
	(GClassInitFunc) gtk_file_chooser_dialog_class_init,
	NULL,		/* class_finalize */
	NULL,		/* class_data */
	sizeof (GtkFileChooserDialog),
	0,		/* n_preallocs */
	(GInstanceInitFunc) gtk_file_chooser_dialog_init,
      };
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      static const GInterfaceInfo file_chooser_info =
      {
	(GInterfaceInitFunc) _gtk_file_chooser_delegate_iface_init, /* interface_init */
	NULL,			                                    /* interface_finalize */
	NULL			                                    /* interface_data */
      };

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      file_chooser_dialog_type = g_type_register_static (GTK_TYPE_DIALOG, I_("GtkFileChooserDialog"),
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							 &file_chooser_dialog_info, 0);
      g_type_add_interface_static (file_chooser_dialog_type,
				   GTK_TYPE_FILE_CHOOSER,
				   &file_chooser_info);
    }

  return file_chooser_dialog_type;
}

static void
gtk_file_chooser_dialog_class_init (GtkFileChooserDialogClass *class)
{
  GObjectClass *gobject_class = G_OBJECT_CLASS (class);
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  GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
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  parent_class = g_type_class_peek_parent (class);

  gobject_class->constructor = gtk_file_chooser_dialog_constructor;
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  gobject_class->set_property = gtk_file_chooser_dialog_set_property;
  gobject_class->get_property = gtk_file_chooser_dialog_get_property;
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  gobject_class->finalize = gtk_file_chooser_dialog_finalize;
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  widget_class->map       = gtk_file_chooser_dialog_map;
  widget_class->unmap     = gtk_file_chooser_dialog_unmap;
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  widget_class->style_set = gtk_file_chooser_dialog_style_set;

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  _gtk_file_chooser_install_properties (gobject_class);

  g_type_class_add_private (class, sizeof (GtkFileChooserDialogPrivate));
}

static void
gtk_file_chooser_dialog_init (GtkFileChooserDialog *dialog)
{
  GtkFileChooserDialogPrivate *priv = G_TYPE_INSTANCE_GET_PRIVATE (dialog,
								   GTK_TYPE_FILE_CHOOSER_DIALOG,
								   GtkFileChooserDialogPrivate);
  dialog->priv = priv;
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  dialog->priv->default_width = -1;
  dialog->priv->default_height = -1;
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  dialog->priv->resize_horizontally = TRUE;
  dialog->priv->resize_vertically = TRUE;
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  gtk_dialog_set_has_separator (GTK_DIALOG (dialog), FALSE);
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  /* We do a signal connection here rather than overriding the method in
   * class_init because GtkDialog::response is a RUN_LAST signal.  We want *our*
   * handler to be run *first*, regardless of whether the user installs response
   * handlers of his own.
   */
  g_signal_connect (dialog, "response",
		    G_CALLBACK (response_cb), NULL);
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}

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static void
gtk_file_chooser_dialog_finalize (GObject *object)
{
  GtkFileChooserDialog *dialog = GTK_FILE_CHOOSER_DIALOG (object);

  g_free (dialog->priv->file_system);
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  G_OBJECT_CLASS (parent_class)->finalize (object);  
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}

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/* Callback used when the user activates a file in the file chooser widget */
static void
file_chooser_widget_file_activated (GtkFileChooser       *chooser,
				    GtkFileChooserDialog *dialog)
{
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  GList *children, *l;

  if (gtk_window_activate_default (GTK_WINDOW (dialog)))
    return;

  /* There probably isn't a default widget, so make things easier for the
   * programmer by looking for a reasonable button on our own.
   */

  children = gtk_container_get_children (GTK_CONTAINER (GTK_DIALOG (dialog)->action_area));

  for (l = children; l; l = l->next)
    {
      GtkWidget *widget;
      int response_id;

      widget = GTK_WIDGET (l->data);
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      response_id = gtk_dialog_get_response_for_widget (GTK_DIALOG (dialog), widget);
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      if (response_id == GTK_RESPONSE_ACCEPT
	  || response_id == GTK_RESPONSE_OK
	  || response_id == GTK_RESPONSE_YES
	  || response_id == GTK_RESPONSE_APPLY)
	{
	  gtk_widget_activate (widget); /* Should we gtk_dialog_response (dialog, response_id) instead? */
	  break;
	}
    }

  g_list_free (children);
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}

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static void
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file_chooser_widget_update_hints (GtkFileChooserDialog *dialog)
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{
  GtkFileChooserDialogPrivate *priv;
  GdkGeometry geometry;

  priv = GTK_FILE_CHOOSER_DIALOG_GET_PRIVATE (dialog);

  geometry.min_width = -1;
  geometry.min_height = -1;
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  geometry.max_width = (priv->resize_horizontally?G_MAXSHORT:-1);
  geometry.max_height = (priv->resize_vertically?G_MAXSHORT:-1);
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  gtk_window_set_geometry_hints (GTK_WINDOW (dialog), NULL,
				 &geometry,
 				 GDK_HINT_MIN_SIZE | GDK_HINT_MAX_SIZE);
}

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static void
clamp_to_screen (GtkWidget *widget,
		 gint      *width,
		 gint      *height)
{
  GdkScreen *screen;
  int monitor_num;
  GdkRectangle monitor;

  g_return_if_fail (GTK_WIDGET_REALIZED (widget));
  
  screen = gtk_widget_get_screen (widget);
  monitor_num = gdk_screen_get_monitor_at_window (screen, widget->window);

  gdk_screen_get_monitor_geometry (screen, monitor_num, &monitor);

  if (width)
    *width = MIN (*width, (monitor.width * 3) / 4);

  if (height)
    *height = MIN (*height, (monitor.height * 3) / 4);
}

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static void
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file_chooser_widget_default_realized_size_changed (GtkWidget            *widget,
						   GtkFileChooserDialog *dialog)
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{
  GtkFileChooserDialogPrivate *priv;
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  gint width;
  gint height;
  gint default_width, default_height;
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  GtkRequisition req;
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  gboolean resize_horizontally;
  gboolean resize_vertically;
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  gboolean update_hints;
  gint dx = 0, dy = 0;
  gint cur_width, cur_height;
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  priv = GTK_FILE_CHOOSER_DIALOG_GET_PRIVATE (dialog);

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  /* Force a size request of everything before we start.  This will make sure
   * that widget->requisition is meaningful. */
  gtk_widget_size_request (GTK_WIDGET (dialog), &req);
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  gtk_window_get_size (GTK_WINDOW (dialog), &cur_width, &cur_height);
  width = GTK_WIDGET (dialog)->requisition.width - priv->widget->requisition.width;
  height = GTK_WIDGET (dialog)->requisition.height - priv->widget->requisition.height;
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  _gtk_file_chooser_embed_get_default_size (GTK_FILE_CHOOSER_EMBED (priv->widget),
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					    &default_width, &default_height);
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  /* Ideal target size modulo any resizing */
  width = default_width + width;
  height = default_height + height;
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  /* Now, we test for resizability */
  update_hints = FALSE;
  _gtk_file_chooser_embed_get_resizable_hints (GTK_FILE_CHOOSER_EMBED (priv->widget),
					       &resize_horizontally,
					       &resize_vertically);
  resize_vertically = (!! resize_vertically);     /* normalize */
  resize_horizontally = (!! resize_horizontally);

  if (resize_horizontally && priv->resize_horizontally)
    {
      dx = default_width - priv->default_width;
      priv->default_width = default_width;
    }
  else if (resize_horizontally && ! priv->resize_horizontally)
    {
      /* We restore to the ideal size + any change in default_size (which is not
       * expected).  It would be nicer to store the older size to restore to in
       * the future. */
      dx = default_width - priv->default_width;
      dx += width - cur_width;
      priv->default_width = default_width;
      update_hints = TRUE;
    }
  else
    {
      update_hints = TRUE;
    }
  
  if (resize_vertically && priv->resize_vertically)
    {
      dy = default_height - priv->default_height;
      priv->default_height = default_height;
    }
  else if (resize_vertically && ! priv->resize_vertically)
    {
      dy = default_height - priv->default_height;
      dy += height - cur_height;
      priv->default_height = default_height;
      update_hints = TRUE;
    }
  else
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    {
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      update_hints = TRUE;
    }
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  priv->resize_horizontally = resize_horizontally;
  priv->resize_vertically = resize_vertically;
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  if (dx != 0 || dy != 0)
    {
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      gint new_width = cur_width + dx;
      gint new_height = cur_height + dy;

      clamp_to_screen (GTK_WIDGET (dialog), &new_width, &new_height);
      
      gtk_window_resize (GTK_WINDOW (dialog), new_width, new_height);
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    }
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  /* Only store the size if we can resize in that direction. */
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  if (update_hints)
    file_chooser_widget_update_hints (dialog);
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}

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static void
file_chooser_widget_default_unrealized_size_changed (GtkWidget            *widget,
						     GtkFileChooserDialog *dialog)
{
  GtkFileChooserDialogPrivate *priv;
  GtkRequisition req;
  gint width, height;

  priv = GTK_FILE_CHOOSER_DIALOG_GET_PRIVATE (dialog);
  gtk_widget_size_request (GTK_WIDGET (dialog), &req);

  _gtk_file_chooser_embed_get_resizable_hints (GTK_FILE_CHOOSER_EMBED (priv->widget),
					       &(priv->resize_horizontally),
					       &(priv->resize_vertically));
  _gtk_file_chooser_embed_get_default_size (GTK_FILE_CHOOSER_EMBED (priv->widget),
					    &(priv->default_width), &(priv->default_height));
  
  /* Determine how much space the rest of the dialog uses compared to priv->widget */
  width = priv->default_width + GTK_WIDGET (dialog)->requisition.width - priv->widget->requisition.width;
  height = priv->default_height + GTK_WIDGET (dialog)->requisition.height - priv->widget->requisition.height;

  gtk_window_set_default_size (GTK_WINDOW (dialog), width, height);
  file_chooser_widget_update_hints (dialog);
}
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static void
file_chooser_widget_default_size_changed (GtkWidget            *widget,
					  GtkFileChooserDialog *dialog)
{
  if (GTK_WIDGET_REALIZED (dialog))
    file_chooser_widget_default_realized_size_changed (widget, dialog);
  else
    file_chooser_widget_default_unrealized_size_changed (widget, dialog);
}
  
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static GObject*
gtk_file_chooser_dialog_constructor (GType                  type,
				     guint                  n_construct_properties,
				     GObjectConstructParam *construct_params)
{
  GtkFileChooserDialogPrivate *priv;
  GObject *object;
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  object = parent_class->constructor (type,
				      n_construct_properties,
				      construct_params);
  priv = GTK_FILE_CHOOSER_DIALOG_GET_PRIVATE (object);

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  gtk_widget_push_composite_child ();

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  if (priv->file_system)
    priv->widget = g_object_new (GTK_TYPE_FILE_CHOOSER_WIDGET,
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				 "file-system-backend", priv->file_system,
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				 NULL);
  else
    priv->widget = g_object_new (GTK_TYPE_FILE_CHOOSER_WIDGET, NULL);
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  g_signal_connect (priv->widget, "file-activated",
		    G_CALLBACK (file_chooser_widget_file_activated), object);
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  g_signal_connect (priv->widget, "default-size-changed",
		    G_CALLBACK (file_chooser_widget_default_size_changed), object);
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  gtk_box_pack_start (GTK_BOX (GTK_DIALOG (object)->vbox), priv->widget, TRUE, TRUE, 0);
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  gtk_widget_show (priv->widget);

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  _gtk_file_chooser_set_delegate (GTK_FILE_CHOOSER (object),
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				  GTK_FILE_CHOOSER (priv->widget));

  gtk_widget_pop_composite_child ();
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  return object;
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}

static void
gtk_file_chooser_dialog_set_property (GObject         *object,
				      guint            prop_id,
				      const GValue    *value,
				      GParamSpec      *pspec)
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{
  GtkFileChooserDialogPrivate *priv = GTK_FILE_CHOOSER_DIALOG_GET_PRIVATE (object);
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  switch (prop_id)
    {
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    case GTK_FILE_CHOOSER_PROP_FILE_SYSTEM_BACKEND:
      g_free (priv->file_system);
      priv->file_system = g_value_dup_string (value);
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      break;
    default:
      g_object_set_property (G_OBJECT (priv->widget), pspec->name, value);
      break;
    }
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}

static void
gtk_file_chooser_dialog_get_property (GObject         *object,
				      guint            prop_id,
				      GValue          *value,
				      GParamSpec      *pspec)
{
  GtkFileChooserDialogPrivate *priv = GTK_FILE_CHOOSER_DIALOG_GET_PRIVATE (object);
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  g_object_get_property (G_OBJECT (priv->widget), pspec->name, value);
}

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#if 0
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static void
set_default_size (GtkFileChooserDialog *dialog)
{
  GtkWidget *widget;
  GtkWindow *window;
  int default_width, default_height;
  int width, height;
  int font_size;
  GdkScreen *screen;
  int monitor_num;
  GtkRequisition req;
  GdkRectangle monitor;

  widget = GTK_WIDGET (dialog);
  window = GTK_WINDOW (dialog);

  /* Size based on characters */

  font_size = pango_font_description_get_size (widget->style->font_desc);
  font_size = PANGO_PIXELS (font_size);

  width = font_size * NUM_CHARS;
  height = font_size * NUM_LINES;

  /* Use at least the requisition size... */

  gtk_widget_size_request (widget, &req);
  width = MAX (width, req.width);
  height = MAX (height, req.height);

  /* ... but no larger than the monitor */

  screen = gtk_widget_get_screen (widget);
  monitor_num = gdk_screen_get_monitor_at_window (screen, widget->window);

  gdk_screen_get_monitor_geometry (screen, monitor_num, &monitor);

  width = MIN (width, monitor.width * 3 / 4);
  height = MIN (height, monitor.height * 3 / 4);

  /* Set size */

  gtk_window_get_default_size (window, &default_width, &default_height);

  gtk_window_set_default_size (window,
			       (default_width == -1) ? width : default_width,
			       (default_height == -1) ? height : default_height);
}
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#endif
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/* GtkWidget::map handler */
static void
gtk_file_chooser_dialog_map (GtkWidget *widget)
{
  GtkFileChooserDialog *dialog = GTK_FILE_CHOOSER_DIALOG (widget);
  GtkFileChooserDialogPrivate *priv = GTK_FILE_CHOOSER_DIALOG_GET_PRIVATE (dialog);

  if (!GTK_WIDGET_MAPPED (priv->widget))
    gtk_widget_map (priv->widget);

  GTK_WIDGET_CLASS (parent_class)->map (widget);

  _gtk_file_chooser_embed_initial_focus (GTK_FILE_CHOOSER_EMBED (priv->widget));
}

/* GtkWidget::unmap handler */
static void
gtk_file_chooser_dialog_unmap (GtkWidget *widget)
{
  GtkFileChooserDialog *dialog = GTK_FILE_CHOOSER_DIALOG (widget);
  GtkFileChooserDialogPrivate *priv = GTK_FILE_CHOOSER_DIALOG_GET_PRIVATE (dialog);

  GTK_WIDGET_CLASS (parent_class)->unmap (widget);

  /* See bug #145470.  We unmap the GtkFileChooserWidget so that if the dialog
   * is remapped, the widget will be remapped as well.  Implementations should
   * refresh their contents when this happens, as some applications keep a
   * single file chooser alive and map/unmap it as needed, rather than creating
   * a new file chooser every time they need one.
   */
  gtk_widget_unmap (priv->widget);
}

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static void
gtk_file_chooser_dialog_style_set (GtkWidget *widget,
				   GtkStyle  *previous_style)
{
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  GtkDialog *dialog;

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  if (GTK_WIDGET_CLASS (parent_class)->style_set)
    GTK_WIDGET_CLASS (parent_class)->style_set (widget, previous_style);

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  dialog = GTK_DIALOG (widget);

  /* Override the style properties with HIG-compliant spacings.  Ugh.
   * http://developer.gnome.org/projects/gup/hig/1.0/layout.html#layout-dialogs
   * http://developer.gnome.org/projects/gup/hig/1.0/windows.html#alert-spacing
   */

  gtk_container_set_border_width (GTK_CONTAINER (dialog->vbox), 12);
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  gtk_box_set_spacing (GTK_BOX (dialog->vbox), 24);
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  gtk_container_set_border_width (GTK_CONTAINER (dialog->action_area), 0);
  gtk_box_set_spacing (GTK_BOX (dialog->action_area), 6);
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}

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/* GtkDialog::response handler */
static void
response_cb (GtkDialog *dialog,
	     gint       response_id)
{
  GtkFileChooserDialogPrivate *priv;

  priv = GTK_FILE_CHOOSER_DIALOG_GET_PRIVATE (dialog);

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  /* Act only on response IDs we recognize */
  if (!(response_id == GTK_RESPONSE_ACCEPT
	|| response_id == GTK_RESPONSE_OK
	|| response_id == GTK_RESPONSE_YES
	|| response_id == GTK_RESPONSE_APPLY))
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    return;

  if (!_gtk_file_chooser_embed_should_respond (GTK_FILE_CHOOSER_EMBED (priv->widget)))
    g_signal_stop_emission_by_name (dialog, "response");
}

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static GtkWidget *
gtk_file_chooser_dialog_new_valist (const gchar          *title,
				    GtkWindow            *parent,
				    GtkFileChooserAction  action,
				    const gchar          *backend,
				    const gchar          *first_button_text,
				    va_list               varargs)
{
  GtkWidget *result;
  const char *button_text = first_button_text;
  gint response_id;

  result = g_object_new (GTK_TYPE_FILE_CHOOSER_DIALOG,
			 "title", title,
			 "action", action,
			 "file-system-backend", backend,
			 NULL);

  if (parent)
    gtk_window_set_transient_for (GTK_WINDOW (result), parent);

  while (button_text)
    {
      response_id = va_arg (varargs, gint);
      gtk_dialog_add_button (GTK_DIALOG (result), button_text, response_id);
      button_text = va_arg (varargs, const gchar *);
    }

  return result;
}

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/**
 * gtk_file_chooser_dialog_new:
 * @title: Title of the dialog, or %NULL
 * @parent: Transient parent of the dialog, or %NULL
 * @action: Open or save mode for the dialog
 * @first_button_text: stock ID or text to go in the first button, or %NULL
 * @Varargs: response ID for the first button, then additional (button, id) pairs, ending with %NULL
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 *
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 * Creates a new #GtkFileChooserDialog.  This function is analogous to
 * gtk_dialog_new_with_buttons().
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 *
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 * Return value: a new #GtkFileChooserDialog
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 *
 * Since: 2.4
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 **/
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GtkWidget *
gtk_file_chooser_dialog_new (const gchar         *title,
			     GtkWindow           *parent,
			     GtkFileChooserAction action,
			     const gchar         *first_button_text,
			     ...)
{
  GtkWidget *result;
  va_list varargs;
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  va_start (varargs, first_button_text);
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  result = gtk_file_chooser_dialog_new_valist (title, parent, action,
					       NULL, first_button_text,
					       varargs);
  va_end (varargs);
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  return result;
}
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/**
 * gtk_file_chooser_dialog_new_with_backend:
 * @title: Title of the dialog, or %NULL
 * @parent: Transient parent of the dialog, or %NULL
 * @action: Open or save mode for the dialog
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 * @backend: The name of the specific filesystem backend to use.
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 * @first_button_text: stock ID or text to go in the first button, or %NULL
 * @Varargs: response ID for the first button, then additional (button, id) pairs, ending with %NULL
 *
 * Creates a new #GtkFileChooserDialog with a specified backend. This is
 * especially useful if you use gtk_file_chooser_set_local_only() to allow
 * non-local files and you use a more expressive vfs, such as gnome-vfs,
 * to load files.
 *
 * Return value: a new #GtkFileChooserDialog
 *
 * Since: 2.4
 **/
GtkWidget *
gtk_file_chooser_dialog_new_with_backend (const gchar          *title,
					  GtkWindow            *parent,
					  GtkFileChooserAction  action,
					  const gchar          *backend,
					  const gchar          *first_button_text,
					  ...)
{
  GtkWidget *result;
  va_list varargs;
  
  va_start (varargs, first_button_text);
  result = gtk_file_chooser_dialog_new_valist (title, parent, action,
					       backend, first_button_text,
					       varargs);
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  va_end (varargs);

  return result;
}
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#define __GTK_FILE_CHOOSER_DIALOG_C__
#include "gtkaliasdef.c"