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gimp/libgimpwidgets/gimpunitmenu.c

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/* LIBGIMP - The GIMP Library
* Copyright (C) 1995-1999 Peter Mattis and Spencer Kimball
*
* gimpunitmenu.c
* Copyright (C) 1999 Michael Natterer <mitch@gimp.org>
*
* 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
* <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#undef GSEAL_ENABLE
#include <gtk/gtk.h>
#include "libgimpbase/gimpbase.h"
#include "gimpwidgetstypes.h"
#include "gimpdialog.h"
#include "gimphelpui.h"
#include "gimpunitmenu.h"
#include "gimpwidgets.h"
#include "libgimp/libgimp-intl.h"
/**
* SECTION: gimpunitmenu
* @title: GimpUnitMenu
* @short_description: Widget for selecting a #GimpUnit.
* @see_also: #GimpUnit, #GimpSizeEntry, gimp_coordinates_new()
*
* This widget provides a #GtkOptionMenu which contains a list of
* #GimpUnit's.
*
* You can specify the string that will be displayed for each unit by
* passing a printf-like @format string to gimp_unit_menu_new().
*
* The constructor also lets you choose if the menu should contain
* items for GIMP_UNIT_PIXEL, GIMP_UNIT_PERCENT and a "More..." item
* which will pop up a dialog for selecting user-defined units.
*
* Whenever the user selects a unit from the menu or the dialog, the
* "unit_changed" signal will be emitted.
**/
enum
{
UNIT_CHANGED,
LAST_SIGNAL
};
enum
{
UNIT_COLUMN,
FACTOR_COLUMN,
DATA_COLUMN,
NUM_COLUMNS
};
static void gimp_unit_menu_finalize (GObject *object);
static const gchar * gimp_unit_menu_build_string (const gchar *format,
GimpUnit unit);
static void gimp_unit_menu_callback (GtkWidget *widget,
gpointer data);
G_DEFINE_TYPE (GimpUnitMenu, gimp_unit_menu, GTK_TYPE_OPTION_MENU)
#define parent_class gimp_unit_menu_parent_class
static guint gimp_unit_menu_signals[LAST_SIGNAL] = { 0 };
static void
gimp_unit_menu_class_init (GimpUnitMenuClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
/**
* GimpUnitMenu::unit-changed:
*
* This signal is emitted whenever the user selects a #GimpUnit from
* the #GimpUnitMenu.
**/
gimp_unit_menu_signals[UNIT_CHANGED] =
g_signal_new ("unit-changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpUnitMenuClass, unit_changed),
NULL, NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE, 0);
object_class->finalize = gimp_unit_menu_finalize;
klass->unit_changed = NULL;
}
static void
gimp_unit_menu_init (GimpUnitMenu *menu)
{
menu->format = NULL;
menu->unit = GIMP_UNIT_PIXEL;
menu->show_pixels = FALSE;
menu->show_percent = FALSE;
menu->selection = NULL;
menu->tv = NULL;
}
static void
gimp_unit_menu_finalize (GObject *object)
{
GimpUnitMenu *menu = GIMP_UNIT_MENU (object);
if (menu->format)
{
g_free (menu->format);
menu->format = NULL;
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
/**
* gimp_unit_menu_new:
* @format: A printf-like format string which is used to create the unit
* strings.
* @unit: The initially selected unit.
* @show_pixels: %TRUE if the unit menu should contain an item for
* GIMP_UNIT_PIXEL.
* @show_percent: %TRUE in the unit menu should contain an item for
* GIMP_UNIT_PERCENT.
* @show_custom: %TRUE if the unit menu should contain a "More..." item for
* opening the user-defined-unit selection dialog.
*
* Creates a new #GimpUnitMenu widget.
*
* The @format string supports the following percent expansions:
*
* <informaltable pgwide="1" frame="none" role="enum">
* <tgroup cols="2"><colspec colwidth="1*"/><colspec colwidth="8*"/>
* <tbody>
* <row>
* <entry>% f</entry>
* <entry>Factor (how many units make up an inch)</entry>
* </row>
* <row>
* <entry>% y</entry>
* <entry>Symbol (e.g. "''" for GIMP_UNIT_INCH)</entry>
* </row>
* <row>
* <entry>% a</entry>
* <entry>Abbreviation</entry>
* </row>
* <row>
* <entry>% s</entry>
* <entry>Singular</entry>
* </row>
* <row>
* <entry>% p</entry>
* <entry>Plural</entry>
* </row>
* <row>
* <entry>%%</entry>
* <entry>Literal percent</entry>
* </row>
* </tbody>
* </tgroup>
* </informaltable>
*
* Returns: A pointer to the new #GimpUnitMenu widget.
**/
GtkWidget *
gimp_unit_menu_new (const gchar *format,
GimpUnit unit,
gboolean show_pixels,
gboolean show_percent,
gboolean show_custom)
{
GimpUnitMenu *unit_menu;
GtkWidget *menu;
GtkWidget *menuitem;
GimpUnit u;
g_return_val_if_fail (((unit >= GIMP_UNIT_PIXEL) &&
(unit < gimp_unit_get_number_of_units ())) ||
(unit == GIMP_UNIT_PERCENT), NULL);
if ((unit >= gimp_unit_get_number_of_built_in_units ()) &&
(unit != GIMP_UNIT_PERCENT))
show_custom = TRUE;
unit_menu = g_object_new (GIMP_TYPE_UNIT_MENU, NULL);
unit_menu->format = g_strdup (format);
unit_menu->show_pixels = show_pixels;
unit_menu->show_percent = show_percent;
menu = gtk_menu_new ();
for (u = show_pixels ? GIMP_UNIT_PIXEL : GIMP_UNIT_INCH;
u < gimp_unit_get_number_of_built_in_units ();
u++)
{
/* special cases "pixels" and "percent" */
if (u == GIMP_UNIT_INCH)
{
if (show_percent)
{
menuitem =
gtk_menu_item_new_with_label
(gimp_unit_menu_build_string (format, GIMP_UNIT_PERCENT));
gtk_menu_shell_append (GTK_MENU_SHELL (menu), menuitem);
g_object_set_data (G_OBJECT (menuitem), "gimp_unit_menu",
GINT_TO_POINTER (GIMP_UNIT_PERCENT));
gtk_widget_show (menuitem);
g_signal_connect (menuitem, "activate",
G_CALLBACK (gimp_unit_menu_callback),
unit_menu);
}
if (show_pixels || show_percent)
{
menuitem = gtk_menu_item_new ();
gtk_menu_shell_append (GTK_MENU_SHELL (menu), menuitem);
gtk_widget_set_sensitive (menuitem, FALSE);
gtk_widget_show (menuitem);
}
}
menuitem =
gtk_menu_item_new_with_label (gimp_unit_menu_build_string (format, u));
gtk_menu_shell_append (GTK_MENU_SHELL (menu), menuitem);
g_object_set_data (G_OBJECT (menuitem), "gimp_unit_menu",
GINT_TO_POINTER (u));
gtk_widget_show (menuitem);
g_signal_connect (menuitem, "activate",
G_CALLBACK (gimp_unit_menu_callback),
unit_menu);
}
if ((unit >= gimp_unit_get_number_of_built_in_units ()) &&
(unit != GIMP_UNIT_PERCENT))
{
menuitem = gtk_menu_item_new ();
gtk_menu_shell_append (GTK_MENU_SHELL (menu), menuitem);
gtk_widget_set_sensitive (menuitem, FALSE);
gtk_widget_show (menuitem);
menuitem =
gtk_menu_item_new_with_label (gimp_unit_menu_build_string (format,
unit));
gtk_menu_shell_append (GTK_MENU_SHELL (menu), menuitem);
g_object_set_data (G_OBJECT (menuitem), "gimp_unit_menu",
GINT_TO_POINTER (unit));
gtk_widget_show (menuitem);
g_signal_connect (menuitem, "activate",
G_CALLBACK (gimp_unit_menu_callback),
unit_menu);
}
if (show_custom)
{
menuitem = gtk_menu_item_new ();
gtk_menu_shell_append (GTK_MENU_SHELL (menu), menuitem);
gtk_widget_set_sensitive (menuitem, FALSE);
gtk_widget_show (menuitem);
menuitem = gtk_menu_item_new_with_label (_("More..."));
gtk_menu_shell_append (GTK_MENU_SHELL (menu), menuitem);
g_object_set_data (G_OBJECT (menuitem), "gimp_unit_menu",
GINT_TO_POINTER (GIMP_UNIT_PERCENT + 1));
gtk_widget_show (menuitem);
g_signal_connect (menuitem, "activate",
G_CALLBACK (gimp_unit_menu_callback),
unit_menu);
}
gtk_option_menu_set_menu (GTK_OPTION_MENU (unit_menu), menu);
unit_menu->unit = unit;
gtk_option_menu_set_history (GTK_OPTION_MENU (unit_menu),
(unit == GIMP_UNIT_PIXEL) ? 0 :
((unit == GIMP_UNIT_PERCENT) ?
(show_pixels ? 1 : 0) :
(((show_pixels || show_percent) ? 2 : 0) +
((show_pixels && show_percent) ? 1 : 0) +
((unit < GIMP_UNIT_END) ?
(unit - 1) : GIMP_UNIT_END))));
return GTK_WIDGET (unit_menu);
}
/**
* gimp_unit_menu_set_unit:
* @menu: The unit menu you want to set the unit for.
* @unit: The new unit.
*
* Sets a new #GimpUnit for the specified #GimpUnitMenu.
**/
void
gimp_unit_menu_set_unit (GimpUnitMenu *menu,
GimpUnit unit)
{
GtkWidget *menuitem = NULL;
GList *items;
gint user_unit;
g_return_if_fail (GIMP_IS_UNIT_MENU (menu));
g_return_if_fail (((unit >= GIMP_UNIT_PIXEL) &&
((unit > GIMP_UNIT_PIXEL) || menu->show_pixels) &&
(unit < gimp_unit_get_number_of_units ())) ||
((unit == GIMP_UNIT_PERCENT) && menu->show_percent));
if (unit == menu->unit)
return;
items = GTK_MENU_SHELL (GTK_OPTION_MENU (menu)->menu)->children;
user_unit = (GIMP_UNIT_END +
(((menu->show_pixels || menu->show_percent) ? 2 : 0) +
((menu->show_pixels && menu->show_percent) ? 1 : 0)));
if ((unit >= GIMP_UNIT_END) && (unit != GIMP_UNIT_PERCENT))
{
if ((g_list_length (items) - 3) >= user_unit)
{
gtk_widget_destroy (GTK_WIDGET (g_list_nth_data (items,
user_unit - 1)));
gtk_widget_destroy (GTK_WIDGET (g_list_nth_data (items,
user_unit - 1)));
}
menuitem = gtk_menu_item_new ();
gtk_menu_shell_append (GTK_MENU_SHELL (GTK_OPTION_MENU (menu)->menu),
menuitem);
gtk_widget_set_sensitive (menuitem, FALSE);
gtk_menu_reorder_child (GTK_MENU (GTK_OPTION_MENU (menu)->menu),
menuitem, user_unit - 1);
gtk_widget_show (menuitem);
menuitem =
gtk_menu_item_new_with_label (gimp_unit_menu_build_string (menu->format,
unit));
gtk_menu_shell_append (GTK_MENU_SHELL (GTK_OPTION_MENU (menu)->menu),
menuitem);
g_object_set_data (G_OBJECT (menuitem), "gimp_unit_menu",
GINT_TO_POINTER (unit));
gtk_menu_reorder_child (GTK_MENU (GTK_OPTION_MENU (menu)->menu),
menuitem, user_unit);
gtk_widget_show (menuitem);
g_signal_connect (menuitem, "activate",
G_CALLBACK (gimp_unit_menu_callback),
menu);
}
menu->unit = unit;
gtk_option_menu_set_history (GTK_OPTION_MENU (menu),
(unit == GIMP_UNIT_PIXEL) ? 0 :
((unit == GIMP_UNIT_PERCENT) ?
(menu->show_pixels ? 1 : 0) :
(((menu->show_pixels ||
menu->show_percent) ? 2 : 0) +
((menu->show_pixels &&
menu->show_percent) ? 1 : 0) +
((unit < GIMP_UNIT_END) ?
(unit - 1) : GIMP_UNIT_END))));
g_signal_emit (menu, gimp_unit_menu_signals[UNIT_CHANGED], 0);
}
/**
* gimp_unit_menu_get_unit:
* @menu: The unit menu you want to know the unit of.
*
* Returns the #GimpUnit the user has selected from the #GimpUnitMenu.
*
* Returns: The unit the user has selected.
**/
GimpUnit
gimp_unit_menu_get_unit (GimpUnitMenu *menu)
{
g_return_val_if_fail (GIMP_IS_UNIT_MENU (menu), GIMP_UNIT_INCH);
return menu->unit;
}
/**
* gimp_unit_menu_set_pixel_digits:
* @menu: a #GimpUnitMenu
* @digits: the number of digits to display for a pixel size
*
* A GimpUnitMenu can be setup to control the number of digits shown
* by attached spinbuttons. Please refer to the documentation of
* gimp_unit_menu_update() to see how this is done.
*
* This function allows to specify the number of digits shown for a
* size in pixels. Usually this is 0 (only full pixels). If you want
* to allow the user to specify sub-pixel sizes using the attached
* spinbuttons, specify the number of digits after the decimal point
* here. You should do this after attaching your spinbuttons.
**/
void
gimp_unit_menu_set_pixel_digits (GimpUnitMenu *menu,
gint digits)
{
GimpUnit unit;
g_return_if_fail (GIMP_IS_UNIT_MENU (menu));
menu->pixel_digits = digits;
gimp_unit_menu_update (GTK_WIDGET (menu), &unit);
}
/**
* gimp_unit_menu_get_pixel_digits:
* @menu: a #GimpUnitMenu
*
* Retrieve the number of digits for a pixel size as set by
* gimp_unit_menu_set_pixel_digits().
*
* Return value: the configured number of digits for a pixel size
**/
gint
gimp_unit_menu_get_pixel_digits (GimpUnitMenu *menu)
{
g_return_val_if_fail (GIMP_IS_UNIT_MENU (menu), 0);
return menu->pixel_digits;
}
/* most of the next two functions is stolen from app/gdisplay.c */
static gint
print (gchar *buf,
gint len,
gint start,
const gchar *fmt,
...)
{
va_list args;
gint printed;
va_start (args, fmt);
printed = g_vsnprintf (buf + start, len - start, fmt, args);
if (printed < 0)
printed = len - start;
va_end (args);
return printed;
}
static const gchar *
gimp_unit_menu_build_string (const gchar *format,
GimpUnit unit)
{
static gchar buffer[64];
gint i = 0;
while (i < (sizeof (buffer) - 1) && *format)
{
switch (*format)
{
case '%':
format++;
switch (*format)
{
case 0:
g_warning ("%s: unit-menu-format string ended within %%-sequence",
G_STRFUNC);
break;
case '%':
buffer[i++] = '%';
break;
case 'f': /* factor (how many units make up an inch) */
i += print (buffer, sizeof (buffer), i, "%f",
gimp_unit_get_factor (unit));
break;
case 'y': /* symbol ("''" for inch) */
i += print (buffer, sizeof (buffer), i, "%s",
gimp_unit_get_symbol (unit));
break;
case 'a': /* abbreviation */
i += print (buffer, sizeof (buffer), i, "%s",
gimp_unit_get_abbreviation (unit));
break;
case 's': /* singular */
i += print (buffer, sizeof (buffer), i, "%s",
gimp_unit_get_singular (unit));
break;
case 'p': /* plural */
i += print (buffer, sizeof (buffer), i, "%s",
gimp_unit_get_plural (unit));
break;
default:
g_warning ("%s: unit-menu-format contains unknown format "
"sequence '%%%c'", G_STRFUNC, *format);
break;
}
break;
default:
buffer[i++] = *format;
break;
}
format++;
}
buffer[MIN (i, sizeof (buffer) - 1)] = 0;
return buffer;
}
/* private callback of gimp_unit_menu_create_selection () */
static void
gimp_unit_menu_selection_response (GtkWidget *widget,
gint response_id,
GimpUnitMenu *menu)
{
if (response_id == GTK_RESPONSE_OK)
{
GtkTreeSelection *sel;
GtkTreeModel *model;
GtkTreeIter iter;
sel = gtk_tree_view_get_selection (GTK_TREE_VIEW (menu->tv));
if (menu->selection && gtk_tree_selection_get_selected (sel, &model,
&iter))
{
GValue val = { 0, };
GimpUnit unit;
gtk_tree_model_get_value (model, &iter, 2, &val);
unit = (GimpUnit) g_value_get_int (&val);
g_value_unset (&val);
gimp_unit_menu_set_unit (menu, unit);
}
}
gtk_widget_destroy (menu->selection);
}
static void
gimp_unit_menu_selection_row_activated_callback (GtkTreeView *tv,
GtkTreePath *path,
GtkTreeViewColumn *column,
GimpUnitMenu *menu)
{
gtk_dialog_response (GTK_DIALOG (menu->selection), GTK_RESPONSE_OK);
}
/* private function of gimp_unit_menu_callback () */
static void
gimp_unit_menu_create_selection (GimpUnitMenu *menu)
{
GtkWidget *parent = gtk_widget_get_toplevel (GTK_WIDGET (menu));
GtkWidget *vbox;
GtkWidget *scrolled_win;
GtkListStore *list;
GtkTreeSelection *sel;
GtkTreeIter iter;
GtkTreePath *path;
GtkDialogFlags flags = GTK_DIALOG_DESTROY_WITH_PARENT;
GimpUnit unit;
gint num_units;
if (gtk_window_get_modal (GTK_WINDOW (parent)))
flags |= GTK_DIALOG_MODAL;
menu->selection = gimp_dialog_new (_("Unit Selection"), "gimp-unit-selection",
parent, flags,
gimp_standard_help_func,
"gimp-unit-dialog",
GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
GTK_STOCK_OK, GTK_RESPONSE_OK,
NULL);
gtk_dialog_set_alternative_button_order (GTK_DIALOG (menu->selection),
GTK_RESPONSE_OK,
GTK_RESPONSE_CANCEL,
-1);
g_object_add_weak_pointer (G_OBJECT (menu->selection),
(gpointer) &menu->selection);
g_signal_connect (menu->selection, "response",
G_CALLBACK (gimp_unit_menu_selection_response),
menu);
g_signal_connect_object (menu, "unmap",
G_CALLBACK (gtk_widget_destroy),
menu->selection, G_CONNECT_SWAPPED);
/* the main vbox */
vbox = gtk_vbox_new (FALSE, 0);
gtk_container_set_border_width (GTK_CONTAINER (vbox), 2);
gtk_container_add (GTK_CONTAINER (gtk_dialog_get_content_area (GTK_DIALOG (menu->selection))),
vbox);
gtk_widget_show (vbox);
/* the selection list */
scrolled_win = gtk_scrolled_window_new (NULL, NULL);
gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (scrolled_win),
GTK_SHADOW_ETCHED_IN);
gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scrolled_win),
GTK_POLICY_NEVER,
GTK_POLICY_ALWAYS);
gtk_container_add (GTK_CONTAINER (vbox), scrolled_win);
gtk_widget_show (scrolled_win);
list = gtk_list_store_new (NUM_COLUMNS, G_TYPE_STRING, G_TYPE_STRING,
G_TYPE_INT);
menu->tv = gtk_tree_view_new_with_model (GTK_TREE_MODEL (list));
g_object_unref (list);
gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (menu->tv),
-1, _("Unit"),
gtk_cell_renderer_text_new (),
"text", UNIT_COLUMN, NULL);
gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (menu->tv),
-1, _("Factor"),
gtk_cell_renderer_text_new (),
"text", FACTOR_COLUMN, NULL);
/* the unit lines */
num_units = gimp_unit_get_number_of_units ();
for (unit = GIMP_UNIT_END; unit < num_units; unit++)
{
gtk_list_store_append (list, &iter);
gtk_list_store_set (list, &iter,
UNIT_COLUMN,
gimp_unit_menu_build_string (menu->format, unit),
-1);
gtk_list_store_set (list, &iter,
FACTOR_COLUMN,
gimp_unit_menu_build_string ("(%f)", unit),
-1);
gtk_list_store_set (list, &iter, DATA_COLUMN, unit, -1);
}
gtk_widget_set_size_request (menu->tv, -1, 150);
gtk_container_add (GTK_CONTAINER (scrolled_win), menu->tv);
g_signal_connect (menu->tv, "row-activated",
G_CALLBACK (gimp_unit_menu_selection_row_activated_callback),
menu);
gtk_widget_show (menu->tv);
g_signal_connect (menu->tv, "destroy",
G_CALLBACK (gtk_widget_destroyed),
&menu->tv);
gtk_widget_show (vbox);
gtk_widget_show (menu->selection);
if (menu->unit >= GIMP_UNIT_END)
{
path = gtk_tree_path_new ();
gtk_tree_path_append_index (path, menu->unit - GIMP_UNIT_END);
sel = gtk_tree_view_get_selection (GTK_TREE_VIEW (menu->tv));
gtk_tree_selection_select_path (sel, path);
gtk_tree_view_scroll_to_cell (GTK_TREE_VIEW (menu->tv), path, NULL,
FALSE, 0.0, 0.0);
}
}
static void
gimp_unit_menu_callback (GtkWidget *widget,
gpointer data)
{
GimpUnitMenu *menu = data;
GimpUnit new_unit;
new_unit = GPOINTER_TO_UINT (g_object_get_data (G_OBJECT (widget),
"gimp_unit_menu"));
if (menu->unit == new_unit)
return;
/* was "More..." selected? */
if (new_unit == (GIMP_UNIT_PERCENT + 1))
{
gtk_option_menu_set_history (GTK_OPTION_MENU (menu),
(menu->unit == GIMP_UNIT_PIXEL) ? 0 :
((menu->unit == GIMP_UNIT_PERCENT) ?
(menu->show_pixels ? 1 : 0) :
((menu->show_pixels ||
menu->show_percent ? 2 : 0) +
(menu->show_pixels &&
menu->show_percent ? 1 : 0) +
((menu->unit < GIMP_UNIT_END) ?
menu->unit - 1 : GIMP_UNIT_END))));
if (! menu->selection)
gimp_unit_menu_create_selection (menu);
return;
}
else if (menu->selection)
{
gtk_widget_destroy (menu->selection);
}
gimp_unit_menu_set_unit (menu, new_unit);
}
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