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Gimp/app/widgets/gimpwidgets-utils.c
Michael Natterer d8a5ca6c1b added new function gimp_toggle_button_set_visible() which can be used as 
2004-11-23  Michael Natterer  <mitch@gimp.org>

	* app/widgets/gimpwidgets-utils.[ch]: added new function
	gimp_toggle_button_set_visible() which can be used as "toggled"
	callback on a GtkToggleButton and sets a widget (in)visible
	according to the toggle's "active" state.

	* app/tools/gimpblendoptions.c
	* app/tools/gimppaintoptions-gui.c
	* app/tools/gimpselectionoptions.c: use it to hide (rather than
	just insensitize) the seldomly used "Feather edges", "Autoshrink
	selection", "Adaptive supersampling", "Fade out" and "Use color
	from gradient" widgets when their enabling toggle is unchecked.
	Makes the affected tool options much less crowded and noisy in
	their default appearance. Fixes bug #159008.
2004-11-23 17:01:51 +00:00

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/* The GIMP -- an image manipulation program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimpwidgets-utils.c
* Copyright (C) 1999-2003 Michael Natterer <mitch@gimp.org>
*
* 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 2 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, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <glib.h>
#ifdef G_OS_WIN32
#include "libgimpbase/gimpwin32-io.h"
#endif
#include <gtk/gtk.h>
#include "libgimpbase/gimpbase.h"
#include "libgimpcolor/gimpcolor.h"
#include "libgimpwidgets/gimpwidgets.h"
#include "widgets-types.h"
#include "gimperrordialog.h"
#include "gimpwidgets-utils.h"
#include "gimp-intl.h"
/**
* gimp_menu_position:
* @menu: a #GtkMenu widget
* @x: pointer to horizontal position
* @y: pointer to vertical position
*
* Positions a #GtkMenu so that it pops up on screen. This function
* takes care of the preferred popup direction (taken from the widget
* render direction) and it handles multiple monitors representing a
* single #GdkScreen (Xinerama).
*
* You should call this function with @x and @y initialized to the
* origin of the menu. This is typically the center of the widget the
* menu is popped up from. gimp_menu_position() will then decide if
* and how these initial values need to be changed.
**/
void
gimp_menu_position (GtkMenu *menu,
gint *x,
gint *y)
{
GtkWidget *widget;
GdkScreen *screen;
GtkRequisition requisition;
GdkRectangle rect;
gint monitor;
g_return_if_fail (GTK_IS_MENU (menu));
g_return_if_fail (x != NULL);
g_return_if_fail (y != NULL);
widget = GTK_WIDGET (menu);
screen = gtk_widget_get_screen (widget);
monitor = gdk_screen_get_monitor_at_point (screen, *x, *y);
gdk_screen_get_monitor_geometry (screen, monitor, &rect);
gtk_menu_set_screen (menu, screen);
gtk_widget_size_request (widget, &requisition);
if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL)
{
*x -= requisition.width;
if (*x < rect.x)
*x += requisition.width;
}
else
{
if (*x + requisition.width > rect.x + rect.width)
*x -= requisition.width;
}
if (*x < rect.x)
*x = rect.x;
if (*y + requisition.height > rect.y + rect.height)
*y -= requisition.height;
if (*y < rect.y)
*y = rect.y;
}
/**
* gimp_button_menu_position:
* @button: a button widget to popup the menu from
* @menu: the menu to position
* @position: the preferred popup direction for the menu (left or right)
* @x: return location for x coordinate
* @y: return location for y coordinate
*
* Utility function to position a menu that pops up from a button.
**/
void
gimp_button_menu_position (GtkWidget *button,
GtkMenu *menu,
GtkPositionType position,
gint *x,
gint *y)
{
GdkScreen *screen;
GtkRequisition menu_requisition;
GdkRectangle rect;
gint monitor;
g_return_if_fail (GTK_WIDGET_REALIZED (button));
g_return_if_fail (GTK_IS_MENU (menu));
g_return_if_fail (x != NULL);
g_return_if_fail (y != NULL);
if (gtk_widget_get_direction (button) == GTK_TEXT_DIR_RTL)
{
switch (position)
{
case GTK_POS_LEFT: position = GTK_POS_RIGHT; break;
case GTK_POS_RIGHT: position = GTK_POS_LEFT; break;
default:
break;
}
}
gdk_window_get_origin (button->window, x, y);
gtk_widget_size_request (GTK_WIDGET (menu), &menu_requisition);
screen = gtk_widget_get_screen (button);
monitor = gdk_screen_get_monitor_at_point (screen, *x, *y);
gdk_screen_get_monitor_geometry (screen, monitor, &rect);
gtk_menu_set_screen (menu, screen);
*x += button->allocation.x;
switch (position)
{
case GTK_POS_LEFT:
*x -= menu_requisition.width;
if (*x < rect.x)
*x += menu_requisition.width + button->allocation.width;
break;
case GTK_POS_RIGHT:
*x += button->allocation.width;
if (*x + menu_requisition.width > rect.x + rect.width)
*x -= button->allocation.width + menu_requisition.width;
break;
default:
g_warning ("%s: unhandled position (%d)", G_STRFUNC, position);
break;
}
*y += button->allocation.y + button->allocation.height / 2;
if (*y + menu_requisition.height > rect.y + rect.height)
*y -= menu_requisition.height;
if (*y < rect.y)
*y = rect.y;
}
void
gimp_table_attach_stock (GtkTable *table,
gint row,
const gchar *label_text,
gdouble yalign,
GtkWidget *widget,
gint colspan,
const gchar *stock_id)
{
GtkWidget *image;
GtkWidget *label;
g_return_if_fail (GTK_IS_TABLE (table));
g_return_if_fail (label_text != NULL);
label = gtk_label_new_with_mnemonic (label_text);
gtk_misc_set_alignment (GTK_MISC (label), 0.0, yalign);
gtk_label_set_justify (GTK_LABEL (label), GTK_JUSTIFY_LEFT);
gtk_table_attach (table, label, 0, 1, row, row + 1,
GTK_FILL, GTK_FILL, 0, 0);
gtk_widget_show (label);
if (widget)
{
g_return_if_fail (GTK_IS_WIDGET (widget));
gtk_table_attach (table, widget, 1, 1 + colspan, row, row + 1,
GTK_EXPAND | GTK_FILL, GTK_EXPAND | GTK_FILL, 0, 0);
gtk_widget_show (widget);
gtk_label_set_mnemonic_widget (GTK_LABEL (label), widget);
}
image = gtk_image_new_from_stock (stock_id, GTK_ICON_SIZE_BUTTON);
if (image)
{
gtk_misc_set_alignment (GTK_MISC (image), 0.0, 0.5);
gtk_table_attach (table, image, 1 + colspan, 2 + colspan, row, row + 1,
GTK_SHRINK | GTK_FILL, GTK_EXPAND | GTK_FILL, 0, 0);
gtk_widget_show (image);
}
}
void
gimp_enum_radio_frame_add (GtkFrame *frame,
GtkWidget *widget,
gint enum_value)
{
GtkWidget *vbox;
GList *children;
GList *list;
gint pos;
g_return_if_fail (GTK_IS_FRAME (frame));
g_return_if_fail (GTK_IS_WIDGET (widget));
vbox = gtk_bin_get_child (GTK_BIN (frame));
g_return_if_fail (GTK_IS_VBOX (vbox));
children = gtk_container_get_children (GTK_CONTAINER (vbox));
for (list = children, pos = 1;
list;
list = g_list_next (list), pos++)
{
if (GTK_IS_RADIO_BUTTON (list->data) &&
GPOINTER_TO_INT (g_object_get_data (list->data, "gimp-item-data")) ==
enum_value)
{
GtkWidget *radio = list->data;
GtkWidget *hbox;
GtkWidget *spacer;
gint indicator_size;
gint indicator_spacing;
gint focus_width;
gint focus_padding;
gtk_widget_style_get (radio,
"indicator-size", &indicator_size,
"indicator-spacing", &indicator_spacing,
"focus-line-width", &focus_width,
"focus-padding", &focus_padding,
NULL);
hbox = gtk_hbox_new (FALSE, 0);
spacer = gtk_vbox_new (FALSE, 0);
gtk_widget_set_size_request (spacer,
indicator_size +
3 * indicator_spacing +
focus_width +
focus_padding +
GTK_CONTAINER (radio)->border_width,
-1);
gtk_box_pack_start (GTK_BOX (hbox), spacer, FALSE, FALSE, 0);
gtk_widget_show (spacer);
gtk_box_pack_start (GTK_BOX (hbox), widget, TRUE, TRUE, 0);
gtk_widget_show (widget);
g_object_set_data (G_OBJECT (radio), "set_sensitive", hbox);
g_signal_connect (radio, "toggled",
G_CALLBACK (gimp_toggle_button_sensitive_update),
NULL);
gtk_widget_set_sensitive (hbox,
GTK_TOGGLE_BUTTON (list->data)->active);
gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
gtk_box_reorder_child (GTK_BOX (vbox), hbox, pos);
gtk_widget_show (hbox);
break;
}
}
g_list_free (children);
}
GtkIconSize
gimp_get_icon_size (GtkWidget *widget,
const gchar *stock_id,
GtkIconSize max_size,
gint width,
gint height)
{
GtkIconSet *icon_set;
GtkIconSize *sizes;
gint n_sizes;
gint i;
gint width_diff = 1024;
gint height_diff = 1024;
gint max_width;
gint max_height;
GtkIconSize icon_size = GTK_ICON_SIZE_MENU;
GdkScreen *screen;
GtkSettings *settings;
g_return_val_if_fail (GTK_IS_WIDGET (widget), icon_size);
g_return_val_if_fail (stock_id != NULL, icon_size);
g_return_val_if_fail (width > 0, icon_size);
g_return_val_if_fail (height > 0, icon_size);
icon_set = gtk_style_lookup_icon_set (widget->style, stock_id);
if (! icon_set)
return GTK_ICON_SIZE_INVALID;
screen = gtk_widget_get_screen (widget);
settings = gtk_settings_get_for_screen (screen);
if (! gtk_icon_size_lookup_for_settings (settings, max_size,
&max_width, &max_height))
{
max_width = 1024;
max_height = 1024;
}
gtk_icon_set_get_sizes (icon_set, &sizes, &n_sizes);
for (i = 0; i < n_sizes; i++)
{
gint icon_width;
gint icon_height;
if (gtk_icon_size_lookup_for_settings (settings, sizes[i],
&icon_width, &icon_height))
{
if (icon_width <= width &&
icon_height <= height &&
icon_width <= max_width &&
icon_height <= max_height &&
((width - icon_width) < width_diff ||
(height - icon_height) < height_diff))
{
width_diff = width - icon_width;
height_diff = height - icon_height;
icon_size = sizes[i];
}
}
}
g_free (sizes);
return icon_size;
}
/* The format string which is used to display modifier names
* <Shift>, <Ctrl> and <Alt>
*/
#define GIMP_MOD_NAME_FORMAT_STRING N_("<%s>")
const gchar *
gimp_get_mod_name_shift (void)
{
static gchar *mod_name_shift = NULL;
if (! mod_name_shift)
{
GtkAccelLabelClass *accel_label_class;
accel_label_class = g_type_class_ref (GTK_TYPE_ACCEL_LABEL);
mod_name_shift = g_strdup_printf (gettext (GIMP_MOD_NAME_FORMAT_STRING),
accel_label_class->mod_name_shift);
g_type_class_unref (accel_label_class);
}
return (const gchar *) mod_name_shift;
}
const gchar *
gimp_get_mod_name_control (void)
{
static gchar *mod_name_control = NULL;
if (! mod_name_control)
{
GtkAccelLabelClass *accel_label_class;
accel_label_class = g_type_class_ref (GTK_TYPE_ACCEL_LABEL);
mod_name_control = g_strdup_printf (gettext (GIMP_MOD_NAME_FORMAT_STRING),
accel_label_class->mod_name_control);
g_type_class_unref (accel_label_class);
}
return (const gchar *) mod_name_control;
}
const gchar *
gimp_get_mod_name_alt (void)
{
static gchar *mod_name_alt = NULL;
if (! mod_name_alt)
{
GtkAccelLabelClass *accel_label_class;
accel_label_class = g_type_class_ref (GTK_TYPE_ACCEL_LABEL);
mod_name_alt = g_strdup_printf (gettext (GIMP_MOD_NAME_FORMAT_STRING),
accel_label_class->mod_name_alt);
g_type_class_unref (accel_label_class);
}
return (const gchar *) mod_name_alt;
}
const gchar *
gimp_get_mod_separator (void)
{
static gchar *mod_separator = NULL;
if (! mod_separator)
{
GtkAccelLabelClass *accel_label_class;
accel_label_class = g_type_class_ref (GTK_TYPE_ACCEL_LABEL);
mod_separator = g_strdup (accel_label_class->mod_separator);
g_type_class_unref (accel_label_class);
}
return (const gchar *) mod_separator;
}
const gchar *
gimp_get_mod_string (GdkModifierType modifiers)
{
static struct
{
GdkModifierType modifiers;
gchar *name;
}
modifier_strings[] =
{
{ GDK_SHIFT_MASK, NULL },
{ GDK_CONTROL_MASK, NULL },
{ GDK_MOD1_MASK, NULL },
{ GDK_SHIFT_MASK | GDK_CONTROL_MASK, NULL },
{ GDK_SHIFT_MASK | GDK_MOD1_MASK, NULL },
{ GDK_CONTROL_MASK | GDK_MOD1_MASK, NULL },
{ GDK_SHIFT_MASK | GDK_CONTROL_MASK | GDK_MOD1_MASK, NULL }
};
gint i;
for (i = 0; i < G_N_ELEMENTS (modifier_strings); i++)
{
if (modifiers == modifier_strings[i].modifiers)
{
if (! modifier_strings[i].name)
{
GString *str = g_string_new ("");
if (modifiers & GDK_SHIFT_MASK)
{
g_string_append (str, gimp_get_mod_name_shift ());
}
if (modifiers & GDK_CONTROL_MASK)
{
if (str->len)
g_string_append (str, gimp_get_mod_separator ());
g_string_append (str, gimp_get_mod_name_control ());
}
if (modifiers & GDK_MOD1_MASK)
{
if (str->len)
g_string_append (str, gimp_get_mod_separator ());
g_string_append (str, gimp_get_mod_name_alt ());
}
modifier_strings[i].name = g_string_free (str, FALSE);
}
return modifier_strings[i].name;
}
}
return NULL;
}
static void
gimp_substitute_underscores (gchar *str)
{
gchar *p;
for (p = str; *p; p++)
if (*p == '_')
*p = ' ';
}
gchar *
gimp_get_accel_string (guint key,
GdkModifierType modifiers)
{
GtkAccelLabelClass *accel_label_class;
GString *gstring;
gunichar ch;
accel_label_class = g_type_class_peek (GTK_TYPE_ACCEL_LABEL);
gstring = g_string_new (gimp_get_mod_string (modifiers));
if (gstring->len > 0)
g_string_append (gstring, gimp_get_mod_separator ());
ch = gdk_keyval_to_unicode (key);
if (ch && (g_unichar_isgraph (ch) || ch == ' ') &&
(ch < 0x80 || accel_label_class->latin1_to_char))
{
switch (ch)
{
case ' ':
g_string_append (gstring, "Space");
break;
case '\\':
g_string_append (gstring, "Backslash");
break;
default:
g_string_append_unichar (gstring, g_unichar_toupper (ch));
break;
}
}
else
{
gchar *tmp;
tmp = gtk_accelerator_name (key, 0);
if (tmp[0] != 0 && tmp[1] == 0)
tmp[0] = g_ascii_toupper (tmp[0]);
gimp_substitute_underscores (tmp);
g_string_append (gstring, tmp);
g_free (tmp);
}
return g_string_free (gstring, FALSE);
}
/**
* gimp_get_screen_resolution:
* @screen: a #GdkScreen or %NULL
* @xres: returns the horizontal screen resolution (in dpi)
* @yres: returns the vertical screen resolution (in dpi)
*
* Retrieves the screen resolution from GDK. If @screen is %NULL, the
* default screen is used.
**/
void
gimp_get_screen_resolution (GdkScreen *screen,
gdouble *xres,
gdouble *yres)
{
gint width, height;
gint width_mm, height_mm;
gdouble x = 0.0;
gdouble y = 0.0;
g_return_if_fail (screen == NULL || GDK_IS_SCREEN (screen));
g_return_if_fail (xres != NULL);
g_return_if_fail (yres != NULL);
if (!screen)
screen = gdk_screen_get_default ();
width = gdk_screen_get_width (screen);
height = gdk_screen_get_height (screen);
width_mm = gdk_screen_get_width_mm (screen);
height_mm = gdk_screen_get_height_mm (screen);
/*
* From xdpyinfo.c:
*
* there are 2.54 centimeters to an inch; so there are 25.4 millimeters.
*
* dpi = N pixels / (M millimeters / (25.4 millimeters / 1 inch))
* = N pixels / (M inch / 25.4)
* = N * 25.4 pixels / M inch
*/
if (width_mm > 0 && height_mm > 0)
{
x = (width * 25.4) / (gdouble) width_mm;
y = (height * 25.4) / (gdouble) height_mm;
}
if (x < GIMP_MIN_RESOLUTION || x > GIMP_MAX_RESOLUTION ||
y < GIMP_MIN_RESOLUTION || y > GIMP_MAX_RESOLUTION)
{
g_warning ("GDK returned bogus values for the screen resolution, "
"using 75 dpi instead.");
x = 75.0;
y = 75.0;
}
/* round the value to full integers to give more pleasant results */
*xres = ROUND (x);
*yres = ROUND (y);
}
/**
* gimp_rgb_get_gdk_color:
* @rgb: the source color as #GimpRGB
* @gdk_color: pointer to a #GdkColor
*
* Initializes @gdk_color from a #GimpRGB. This function does not
* allocate the color for you. Depending on how you want to use it,
* you may have to call gdk_colormap_alloc_color().
**/
void
gimp_rgb_get_gdk_color (const GimpRGB *rgb,
GdkColor *gdk_color)
{
guchar r, g, b;
g_return_if_fail (rgb != NULL);
g_return_if_fail (gdk_color != NULL);
gimp_rgb_get_uchar (rgb, &r, &g, &b);
gdk_color->red = (r << 8) | r;
gdk_color->green = (g << 8) | g;
gdk_color->blue = (b << 8) | b;
}
/**
* gimp_rgb_set_gdk_color:
* @rgb: a #GimpRGB that is to be set
* @gdk_color: pointer to the source #GdkColor
*
* Initializes @rgb from a #GdkColor. This function does not touch
* the alpha value of @rgb.
**/
void
gimp_rgb_set_gdk_color (GimpRGB *rgb,
const GdkColor *gdk_color)
{
guchar r, g, b;
g_return_if_fail (rgb != NULL);
g_return_if_fail (gdk_color != NULL);
r = gdk_color->red >> 8;
g = gdk_color->green >> 8;
b = gdk_color->blue >> 8;
gimp_rgb_set_uchar (rgb, r, g, b);
}
void
gimp_window_set_hint (GtkWindow *window,
GimpWindowHint hint)
{
g_return_if_fail (GTK_IS_WINDOW (window));
switch (hint)
{
case GIMP_WINDOW_HINT_NORMAL:
gtk_window_set_type_hint (window, GDK_WINDOW_TYPE_HINT_NORMAL);
break;
case GIMP_WINDOW_HINT_UTILITY:
gtk_window_set_type_hint (window, GDK_WINDOW_TYPE_HINT_UTILITY);
break;
case GIMP_WINDOW_HINT_KEEP_ABOVE:
gtk_window_set_keep_above (window, TRUE);
break;
}
}
void
gimp_dialog_set_sensitive (GtkDialog *dialog,
gboolean sensitive)
{
GList *children;
GList *list;
g_return_if_fail (GTK_IS_DIALOG (dialog));
children = gtk_container_get_children (GTK_CONTAINER (dialog->vbox));
for (list = children; list; list = g_list_next (list))
{
/* skip the last item (the action area) */
if (! g_list_next (list))
break;
gtk_widget_set_sensitive (list->data, sensitive);
}
g_list_free (children);
if (sensitive)
gtk_dialog_set_response_sensitive (dialog, GTK_RESPONSE_CANCEL, sensitive);
gtk_dialog_set_response_sensitive (dialog, GTK_RESPONSE_OK, sensitive);
}
gboolean
gimp_text_buffer_load (GtkTextBuffer *buffer,
const gchar *filename,
GError **error)
{
FILE *file;
gchar buf[2048];
gint remaining = 0;
GtkTextIter iter;
g_return_val_if_fail (GTK_IS_TEXT_BUFFER (buffer), FALSE);
g_return_val_if_fail (filename != NULL, FALSE);
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
file = fopen (filename, "r");
if (! file)
{
g_set_error (error, G_FILE_ERROR, g_file_error_from_errno (errno),
g_strerror (errno));
return FALSE;
}
gtk_text_buffer_set_text (buffer, "", 0);
gtk_text_buffer_get_iter_at_offset (buffer, &iter, 0);
while (! feof (file))
{
const char *leftover;
gint count;
gint to_read = sizeof (buf) - remaining - 1;
count = fread (buf + remaining, 1, to_read, file);
buf[count + remaining] = '\0';
g_utf8_validate (buf, count + remaining, &leftover);
gtk_text_buffer_insert (buffer, &iter, buf, leftover - buf);
remaining = (buf + remaining + count) - leftover;
g_memmove (buf, leftover, remaining);
if (remaining > 6 || count < to_read)
break;
}
if (remaining)
g_message (_("Invalid UTF-8 data in file '%s'."),
gimp_filename_to_utf8 (filename));
return TRUE;
}
gboolean
gimp_text_buffer_save (GtkTextBuffer *buffer,
const gchar *filename,
gboolean selection_only,
GError **error)
{
GtkTextIter start_iter;
GtkTextIter end_iter;
gint fd;
gchar *text_contents;
g_return_val_if_fail (GTK_IS_TEXT_BUFFER (buffer), FALSE);
g_return_val_if_fail (filename != NULL, FALSE);
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
fd = open (filename, O_WRONLY | O_CREAT | O_APPEND, S_IRUSR | S_IWUSR);
if (fd == -1)
{
g_set_error (error, G_FILE_ERROR, g_file_error_from_errno (errno),
g_strerror (errno));
return FALSE;
}
if (selection_only)
gtk_text_buffer_get_selection_bounds (buffer, &start_iter, &end_iter);
else
gtk_text_buffer_get_bounds (buffer, &start_iter, &end_iter);
text_contents = gtk_text_buffer_get_text (buffer,
&start_iter, &end_iter, TRUE);
if (text_contents)
{
gint text_length = strlen (text_contents);
if (text_length > 0)
{
gint bytes_written;
bytes_written = write (fd, text_contents, text_length);
if (bytes_written != text_length)
{
g_free (text_contents);
close (fd);
g_set_error (error, G_FILE_ERROR, g_file_error_from_errno (errno),
g_strerror (errno));
return FALSE;
}
}
g_free (text_contents);
}
close (fd);
return TRUE;
}
void
gimp_toggle_button_set_visible (GtkToggleButton *toggle,
GtkWidget *widget)
{
g_return_if_fail (GTK_IS_TOGGLE_BUTTON (toggle));
g_return_if_fail (GTK_IS_WIDGET (widget));
if (gtk_toggle_button_get_active (toggle))
gtk_widget_show (widget);
else
gtk_widget_hide (widget);
}
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