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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <gtk/gtk.h>
#include "libgimpmath/gimpmath.h"
#include "libgimpwidgets/gimpwidgets.h"
#include "display-types.h"
#include "core/gimp.h"
#include "core/gimpviewable.h"
#include "widgets/gimphelp-ids.h"
#include "widgets/gimpviewabledialog.h"
#include "gimpdisplay.h"
#include "gimpdisplayshell.h"
#include "gimpdisplayshell-scale.h"
#include "gimpdisplayshell-scale-dialog.h"
#include "gimp-intl.h"
#define SCALE_EPSILON 0.0001
#define SCALE_EQUALS(a,b) (fabs ((a) - (b)) < SCALE_EPSILON)
typedef struct
{
GimpDisplayShell *shell;
GimpZoomModel *model;
GtkAdjustment *scale_adj;
GtkAdjustment *num_adj;
GtkAdjustment *denom_adj;
} ScaleDialogData;
/* local function prototypes */
static void gimp_display_shell_scale_dialog_response (GtkWidget *widget,
gint response_id,
ScaleDialogData *dialog);
static void gimp_display_shell_scale_dialog_free (ScaleDialogData *dialog);
static void update_zoom_values (GtkAdjustment *adj,
ScaleDialogData *dialog);
/* public functions */
/**
* gimp_display_shell_scale_dialog:
* @shell: the #GimpDisplayShell
*
* Constructs and displays a dialog allowing the user to enter a
* custom display scale.
**/
void
gimp_display_shell_scale_dialog (GimpDisplayShell *shell)
{
ScaleDialogData *data;
GimpImage *image;
GtkWidget *toplevel;
GtkWidget *hbox;
GtkWidget *table;
GtkWidget *spin;
GtkWidget *label;
gint num, denom, row;
g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
if (shell->scale_dialog)
{
gtk_window_present (GTK_WINDOW (shell->scale_dialog));
return;
}
if (SCALE_EQUALS (shell->other_scale, 0.0))
{
/* other_scale not yet initialized */
shell->other_scale = gimp_zoom_model_get_factor (shell->zoom);
}
image = gimp_display_get_image (shell->display);
data = g_slice_new (ScaleDialogData);
data->shell = shell;
data->model = g_object_new (GIMP_TYPE_ZOOM_MODEL,
"value", fabs (shell->other_scale),
NULL);
shell->scale_dialog =
gimp_viewable_dialog_new (GIMP_VIEWABLE (image),
gimp_get_user_context (shell->display->gimp),
_("Zoom Ratio"), "display_scale",
GTK_STOCK_ZOOM_100,
_("Select Zoom Ratio"),
GTK_WIDGET (shell),
gimp_standard_help_func,
GIMP_HELP_VIEW_ZOOM_OTHER,
GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
GTK_STOCK_OK, GTK_RESPONSE_OK,
NULL);
gtk_dialog_set_alternative_button_order (GTK_DIALOG (shell->scale_dialog),
GTK_RESPONSE_OK,
GTK_RESPONSE_CANCEL,
-1);
g_object_weak_ref (G_OBJECT (shell->scale_dialog),
(GWeakNotify) gimp_display_shell_scale_dialog_free, data);
g_object_weak_ref (G_OBJECT (shell->scale_dialog),
(GWeakNotify) g_object_unref, data->model);
g_object_add_weak_pointer (G_OBJECT (shell->scale_dialog),
(gpointer) &shell->scale_dialog);
toplevel = gtk_widget_get_toplevel (GTK_WIDGET (shell));
gtk_window_set_transient_for (GTK_WINDOW (shell->scale_dialog),
GTK_WINDOW (toplevel));
gtk_window_set_destroy_with_parent (GTK_WINDOW (shell->scale_dialog), TRUE);
g_signal_connect (shell->scale_dialog, "response",
G_CALLBACK (gimp_display_shell_scale_dialog_response),
data);
table = gtk_table_new (2, 2, FALSE);
gtk_container_set_border_width (GTK_CONTAINER (table), 12);
gtk_table_set_col_spacings (GTK_TABLE (table), 6);
gtk_table_set_row_spacings (GTK_TABLE (table), 6);
gtk_box_pack_start (GTK_BOX (gtk_dialog_get_content_area (GTK_DIALOG (shell->scale_dialog))),
table, TRUE, TRUE, 0);
gtk_widget_show (table);
row = 0;
hbox = gtk_hbox_new (FALSE, 6);
gimp_table_attach_aligned (GTK_TABLE (table), 0, row++,
_("Zoom ratio:"), 0.0, 0.5,
hbox, 1, FALSE);
gimp_zoom_model_get_fraction (data->model, &num, &denom);
spin = gimp_spin_button_new ((GtkObject **) &data->num_adj,
num, 1, 256,
1, 8, 0, 1, 0);
gtk_entry_set_activates_default (GTK_ENTRY (spin), TRUE);
gtk_box_pack_start (GTK_BOX (hbox), spin, TRUE, TRUE, 0);
gtk_widget_show (spin);
label = gtk_label_new (":");
gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0);
gtk_widget_show (label);
spin = gimp_spin_button_new ((GtkObject **) &data->denom_adj,
denom, 1, 256,
1, 8, 0, 1, 0);
gtk_entry_set_activates_default (GTK_ENTRY (spin), TRUE);
gtk_box_pack_start (GTK_BOX (hbox), spin, TRUE, TRUE, 0);
gtk_widget_show (spin);
hbox = gtk_hbox_new (FALSE, 6);
gimp_table_attach_aligned (GTK_TABLE (table), 0, row++,
_("Zoom:"), 0.0, 0.5,
hbox, 1, FALSE);
spin = gimp_spin_button_new ((GtkObject **) &data->scale_adj,
fabs (shell->other_scale) * 100,
100.0 / 256.0, 25600.0,
10, 50, 0, 1, 2);
gtk_entry_set_activates_default (GTK_ENTRY (spin), TRUE);
gtk_box_pack_start (GTK_BOX (hbox), spin, TRUE, TRUE, 0);
gtk_widget_show (spin);
label = gtk_label_new ("%");
gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0);
gtk_widget_show (label);
g_signal_connect (data->scale_adj, "value-changed",
G_CALLBACK (update_zoom_values), data);
g_signal_connect (data->num_adj, "value-changed",
G_CALLBACK (update_zoom_values), data);
g_signal_connect (data->denom_adj, "value-changed",
G_CALLBACK (update_zoom_values), data);
gtk_widget_show (shell->scale_dialog);
}
static void
gimp_display_shell_scale_dialog_response (GtkWidget *widget,
gint response_id,
ScaleDialogData *dialog)
{
if (response_id == GTK_RESPONSE_OK)
{
gdouble scale;
scale = gtk_adjustment_get_value (dialog->scale_adj);
gimp_display_shell_scale (dialog->shell,
GIMP_ZOOM_TO,
scale / 100.0,
GIMP_ZOOM_FOCUS_BEST_GUESS);
}
else
{
/* need to emit "scaled" to get the menu updated */
gimp_display_shell_scaled (dialog->shell);
}
dialog->shell->other_scale = - fabs (dialog->shell->other_scale);
gtk_widget_destroy (dialog->shell->scale_dialog);
}
static void
gimp_display_shell_scale_dialog_free (ScaleDialogData *dialog)
{
g_slice_free (ScaleDialogData, dialog);
}
static void
update_zoom_values (GtkAdjustment *adj,
ScaleDialogData *dialog)
{
gint num, denom;
gdouble scale;
g_signal_handlers_block_by_func (dialog->scale_adj,
update_zoom_values,
dialog);
g_signal_handlers_block_by_func (dialog->num_adj,
update_zoom_values,
dialog);
g_signal_handlers_block_by_func (dialog->denom_adj,
update_zoom_values,
dialog);
if (adj == dialog->scale_adj)
{
scale = gtk_adjustment_get_value (dialog->scale_adj);
gimp_zoom_model_zoom (dialog->model, GIMP_ZOOM_TO, scale / 100.0);
gimp_zoom_model_get_fraction (dialog->model, &num, &denom);
gtk_adjustment_set_value (dialog->num_adj, num);
gtk_adjustment_set_value (dialog->denom_adj, denom);
}
else /* fraction adjustments */
{
scale = (gtk_adjustment_get_value (dialog->num_adj) /
gtk_adjustment_get_value (dialog->denom_adj));
gtk_adjustment_set_value (dialog->scale_adj, scale * 100);
}
g_signal_handlers_unblock_by_func (dialog->scale_adj,
update_zoom_values,
dialog);
g_signal_handlers_unblock_by_func (dialog->num_adj,
update_zoom_values,
dialog);
g_signal_handlers_unblock_by_func (dialog->denom_adj,
update_zoom_values,
dialog);
}
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