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-rw-r--r--app/display/gimpdisplayshell-scale-dialog.c293
1 files changed, 293 insertions, 0 deletions
diff --git a/app/display/gimpdisplayshell-scale-dialog.c b/app/display/gimpdisplayshell-scale-dialog.c
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+++ b/app/display/gimpdisplayshell-scale-dialog.c
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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 <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gegl.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",
+ "zoom-original",
+ _("Select Zoom Ratio"),
+ GTK_WIDGET (shell),
+ gimp_standard_help_func,
+ GIMP_HELP_VIEW_ZOOM_OTHER,
+
+ _("_Cancel"), GTK_RESPONSE_CANCEL,
+ _("_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_box_new (GTK_ORIENTATION_HORIZONTAL, 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);
+
+ data->num_adj = (GtkAdjustment *)
+ gtk_adjustment_new (num, 1, 256, 1, 8, 0);
+ spin = gimp_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 = (GtkAdjustment *)
+ gtk_adjustment_new (denom, 1, 256, 1, 8, 0);
+ spin = gimp_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);
+ gimp_table_attach_aligned (GTK_TABLE (table), 0, row++,
+ _("Zoom:"), 0.0, 0.5,
+ hbox, 1, FALSE);
+
+ data->scale_adj = (GtkAdjustment *)
+ gtk_adjustment_new (fabs (shell->other_scale) * 100,
+ 100.0 / 256.0, 25600.0,
+ 10, 50, 0);
+ spin = gimp_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
+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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