AlderconeStudio/PIKApp
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PIKApp
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PIKApp/app/display/pikadisplayshell-scale-dial...

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/* PIKA - Photo and Image Kooker Application
* a rebranding of The GNU Image Manipulation Program (created with heckimp)
* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
*
* Original copyright, applying to most contents (license remains unchanged):
* 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 <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <gegl.h>
#include <gtk/gtk.h>
#include "libpikamath/pikamath.h"
#include "libpikawidgets/pikawidgets.h"
#include "display-types.h"
#include "core/pika.h"
#include "core/pikaviewable.h"
#include "widgets/pikaaction.h"
#include "widgets/pikahelp-ids.h"
#include "widgets/pikaviewabledialog.h"
#include "pikadisplay.h"
#include "pikadisplayshell.h"
#include "pikadisplayshell-scale.h"
#include "pikadisplayshell-scale-dialog.h"
#include "pika-intl.h"
#define SCALE_EPSILON 0.0001
#define SCALE_EQUALS(a,b) (fabs ((a) - (b)) < SCALE_EPSILON)
typedef struct
{
PikaDisplayShell *shell;
PikaZoomModel *model;
GtkAdjustment *scale_adj;
GtkAdjustment *num_adj;
GtkAdjustment *denom_adj;
gdouble prev_scale;
gdouble *other_scale;
} ScaleDialogData;
/* local function prototypes */
static void pika_display_shell_scale_dialog_response (GtkWidget *widget,
gint response_id,
ScaleDialogData *dialog);
static void pika_display_shell_scale_dialog_free (ScaleDialogData *dialog);
static void update_zoom_values (GtkAdjustment *adj,
ScaleDialogData *dialog);
/* public functions */
/**
* pika_display_shell_scale_dialog:
* @shell: the #PikaDisplayShell
*
* Constructs and displays a dialog allowing the user to enter a
* custom display scale.
**/
void
pika_display_shell_scale_dialog (PikaDisplayShell *shell)
{
/* scale factor entered in Zoom->Other*/
static gdouble other_scale = 0.0;
ScaleDialogData *data;
PikaImage *image;
GtkWidget *toplevel;
GtkWidget *hbox;
GtkWidget *grid;
GtkWidget *spin;
GtkWidget *label;
gint num, denom, row;
g_return_if_fail (PIKA_IS_DISPLAY_SHELL (shell));
if (shell->scale_dialog)
{
gtk_window_present (GTK_WINDOW (shell->scale_dialog));
return;
}
data = g_slice_new (ScaleDialogData);
data->prev_scale = other_scale;
data->other_scale = &other_scale;
if (SCALE_EQUALS (other_scale, 0.0))
{
/* other_scale not yet initialized */
other_scale = pika_zoom_model_get_factor (shell->zoom);
}
image = pika_display_get_image (shell->display);
data->shell = shell;
data->model = g_object_new (PIKA_TYPE_ZOOM_MODEL,
"value", fabs (other_scale),
NULL);
g_set_weak_pointer
(&shell->scale_dialog,
pika_viewable_dialog_new (g_list_prepend (NULL, image),
pika_get_user_context (shell->display->pika),
_("Zoom Ratio"), "display_scale",
"zoom-original",
_("Select Zoom Ratio"),
GTK_WIDGET (shell),
pika_standard_help_func,
PIKA_HELP_VIEW_ZOOM_OTHER,
_("_Cancel"), GTK_RESPONSE_CANCEL,
_("_OK"), GTK_RESPONSE_OK,
NULL));
pika_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) pika_display_shell_scale_dialog_free, data);
g_object_weak_ref (G_OBJECT (shell->scale_dialog),
(GWeakNotify) g_object_unref, data->model);
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 (pika_display_shell_scale_dialog_response),
data);
grid = gtk_grid_new ();
gtk_container_set_border_width (GTK_CONTAINER (grid), 12);
gtk_grid_set_column_spacing (GTK_GRID (grid), 6);
gtk_grid_set_row_spacing (GTK_GRID (grid), 6);
gtk_box_pack_start (GTK_BOX (gtk_dialog_get_content_area (GTK_DIALOG (shell->scale_dialog))),
grid, TRUE, TRUE, 0);
gtk_widget_show (grid);
row = 0;
hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
pika_grid_attach_aligned (GTK_GRID (grid), 0, row++,
_("Zoom ratio:"), 0.0, 0.5,
hbox, 1);
pika_zoom_model_get_fraction (data->model, &num, &denom);
data->num_adj = gtk_adjustment_new (num, 1, 256, 1, 8, 0);
spin = pika_spin_button_new (data->num_adj, 1.0, 0);
gtk_spin_button_set_numeric (GTK_SPIN_BUTTON (spin), TRUE);
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);
data->denom_adj = gtk_adjustment_new (denom, 1, 256, 1, 8, 0);
spin = pika_spin_button_new (data->denom_adj, 1.0, 0);
gtk_spin_button_set_numeric (GTK_SPIN_BUTTON (spin), TRUE);
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_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
pika_grid_attach_aligned (GTK_GRID (grid), 0, row++,
_("Zoom:"), 0.0, 0.5,
hbox, 1);
data->scale_adj = gtk_adjustment_new (other_scale * 100,
100.0 / 256.0, 25600.0,
10, 50, 0);
spin = pika_spin_button_new (data->scale_adj, 1.0, 2);
gtk_spin_button_set_numeric (GTK_SPIN_BUTTON (spin), TRUE);
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
pika_display_shell_scale_dialog_response (GtkWidget *widget,
gint response_id,
ScaleDialogData *dialog)
{
if (response_id == GTK_RESPONSE_OK)
{
GAction *action;
gchar *label;
gchar *zoom_str;
gdouble scale;
scale = gtk_adjustment_get_value (dialog->scale_adj);
pika_display_shell_scale (dialog->shell,
PIKA_ZOOM_TO,
scale / 100.0,
PIKA_ZOOM_FOCUS_BEST_GUESS);
g_object_get (dialog->shell->zoom,
"percentage", &zoom_str,
NULL);
/* Change the "view-zoom-other" label. */
action = g_action_map_lookup_action (G_ACTION_MAP (dialog->shell->display->pika->app),
"view-zoom-other");
label = g_strdup_printf (_("Othe_r (%s)..."), zoom_str);
pika_action_set_short_label (PIKA_ACTION (action), label);
g_free (label);
label = g_strdup_printf (_("Custom Zoom (%s)..."), zoom_str);
pika_action_set_label (PIKA_ACTION (action), label);
g_free (label);
g_free (zoom_str);
}
else
{
/* need to emit "scaled" to get the menu updated */
pika_display_shell_scaled (dialog->shell);
*(dialog->other_scale) = dialog->prev_scale;
}
gtk_widget_destroy (dialog->shell->scale_dialog);
}
static void
pika_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);
pika_zoom_model_zoom (dialog->model, PIKA_ZOOM_TO, scale / 100.0);
pika_zoom_model_get_fraction (dialog->model, &num, &denom);
gtk_adjustment_set_value (dialog->num_adj, num);
gtk_adjustment_set_value (dialog->denom_adj, denom);
*(dialog->other_scale) = scale / 100.0;
}
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);
*(dialog->other_scale) = scale;
}
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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