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-rw-r--r--app/display/gimpscalecombobox.c562
1 files changed, 562 insertions, 0 deletions
diff --git a/app/display/gimpscalecombobox.c b/app/display/gimpscalecombobox.c
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+++ b/app/display/gimpscalecombobox.c
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+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpscalecombobox.c
+ * Copyright (C) 2004, 2008 Sven Neumann <sven@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 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 "stdlib.h"
+
+#include <gegl.h>
+#include <gtk/gtk.h>
+#include "gdk/gdkkeysyms.h"
+
+#include "libgimpbase/gimpbase.h"
+#include "libgimpmath/gimpmath.h"
+
+#include "display-types.h"
+
+#include "core/gimpmarshal.h"
+
+#include "gimpscalecombobox.h"
+
+
+#define MAX_ITEMS 10
+
+enum
+{
+ COLUMN_SCALE,
+ COLUMN_LABEL,
+ COLUMN_PERSISTENT,
+ N_COLUMNS
+};
+
+enum
+{
+ ENTRY_ACTIVATED,
+ LAST_SIGNAL
+};
+
+
+static void gimp_scale_combo_box_constructed (GObject *object);
+static void gimp_scale_combo_box_finalize (GObject *object);
+
+static void gimp_scale_combo_box_style_set (GtkWidget *widget,
+ GtkStyle *prev_style);
+
+static void gimp_scale_combo_box_changed (GimpScaleComboBox *combo_box);
+static void gimp_scale_combo_box_entry_activate (GtkWidget *entry,
+ GimpScaleComboBox *combo_box);
+static gboolean gimp_scale_combo_box_entry_key_press (GtkWidget *entry,
+ GdkEventKey *event,
+ GimpScaleComboBox *combo_box);
+
+static void gimp_scale_combo_box_scale_iter_set (GtkListStore *store,
+ GtkTreeIter *iter,
+ gdouble scale,
+ gboolean persistent);
+
+
+G_DEFINE_TYPE (GimpScaleComboBox, gimp_scale_combo_box,
+ GTK_TYPE_COMBO_BOX)
+
+#define parent_class gimp_scale_combo_box_parent_class
+
+static guint scale_combo_box_signals[LAST_SIGNAL] = { 0 };
+
+
+static void
+gimp_scale_combo_box_class_init (GimpScaleComboBoxClass *klass)
+{
+ GObjectClass *object_class = G_OBJECT_CLASS (klass);
+ GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
+
+ scale_combo_box_signals[ENTRY_ACTIVATED] =
+ g_signal_new ("entry-activated",
+ G_TYPE_FROM_CLASS (klass),
+ G_SIGNAL_RUN_FIRST,
+ G_STRUCT_OFFSET (GimpScaleComboBoxClass, entry_activated),
+ NULL, NULL,
+ gimp_marshal_VOID__VOID,
+ G_TYPE_NONE, 0);
+
+ object_class->constructed = gimp_scale_combo_box_constructed;
+ object_class->finalize = gimp_scale_combo_box_finalize;
+
+ widget_class->style_set = gimp_scale_combo_box_style_set;
+
+ klass->entry_activated = NULL;
+
+ gtk_widget_class_install_style_property (widget_class,
+ g_param_spec_double ("label-scale",
+ NULL, NULL,
+ 0.0,
+ G_MAXDOUBLE,
+ 1.0,
+ GIMP_PARAM_READABLE));
+}
+
+static void
+gimp_scale_combo_box_init (GimpScaleComboBox *combo_box)
+{
+ combo_box->scale = 1.0;
+ combo_box->last_path = NULL;
+}
+
+static void
+gimp_scale_combo_box_constructed (GObject *object)
+{
+ GimpScaleComboBox *combo_box = GIMP_SCALE_COMBO_BOX (object);
+ GtkWidget *entry;
+ GtkListStore *store;
+ GtkCellLayout *layout;
+ GtkCellRenderer *cell;
+ GtkTreeIter iter;
+ GtkBorder border = { 0, 0, 0, 0 };
+ gint i;
+
+ G_OBJECT_CLASS (parent_class)->constructed (object);
+
+ store = gtk_list_store_new (N_COLUMNS,
+ G_TYPE_DOUBLE, /* SCALE */
+ G_TYPE_STRING, /* LABEL */
+ G_TYPE_BOOLEAN); /* PERSISTENT */
+
+ gtk_combo_box_set_model (GTK_COMBO_BOX (combo_box), GTK_TREE_MODEL (store));
+ g_object_unref (store);
+
+ gtk_combo_box_set_entry_text_column (GTK_COMBO_BOX (combo_box),
+ COLUMN_LABEL);
+
+ entry = gtk_bin_get_child (GTK_BIN (combo_box));
+
+ g_object_set (entry,
+ "xalign", 1.0,
+ "width-chars", 5,
+ "truncate-multiline", TRUE,
+ "inner-border", &border,
+ NULL);
+
+ layout = GTK_CELL_LAYOUT (combo_box);
+
+ cell = g_object_new (GTK_TYPE_CELL_RENDERER_TEXT,
+ "xalign", 1.0,
+ NULL);
+
+ gtk_cell_layout_clear (layout);
+ gtk_cell_layout_pack_start (layout, cell, TRUE);
+ gtk_cell_layout_set_attributes (layout, cell,
+ "text", COLUMN_LABEL,
+ NULL);
+
+ for (i = 8; i > 0; i /= 2)
+ {
+ gtk_list_store_append (store, &iter);
+ gimp_scale_combo_box_scale_iter_set (store, &iter, i, TRUE);
+ }
+
+ for (i = 2; i <= 8; i *= 2)
+ {
+ gtk_list_store_append (store, &iter);
+ gimp_scale_combo_box_scale_iter_set (store, &iter, 1.0 / i, TRUE);
+ }
+
+ g_signal_connect (combo_box, "changed",
+ G_CALLBACK (gimp_scale_combo_box_changed),
+ NULL);
+
+ g_signal_connect (entry, "activate",
+ G_CALLBACK (gimp_scale_combo_box_entry_activate),
+ combo_box);
+ g_signal_connect (entry, "key-press-event",
+ G_CALLBACK (gimp_scale_combo_box_entry_key_press),
+ combo_box);
+}
+
+static void
+gimp_scale_combo_box_finalize (GObject *object)
+{
+ GimpScaleComboBox *combo_box = GIMP_SCALE_COMBO_BOX (object);
+
+ if (combo_box->last_path)
+ {
+ gtk_tree_path_free (combo_box->last_path);
+ combo_box->last_path = NULL;
+ }
+
+ if (combo_box->mru)
+ {
+ g_list_free_full (combo_box->mru,
+ (GDestroyNotify) gtk_tree_row_reference_free);
+ combo_box->mru = NULL;
+ }
+
+ G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+static void
+gimp_scale_combo_box_style_set (GtkWidget *widget,
+ GtkStyle *prev_style)
+{
+ GtkWidget *entry;
+ GtkRcStyle *rc_style;
+ PangoContext *context;
+ PangoFontDescription *font_desc;
+ gint font_size;
+ gdouble label_scale;
+
+ GTK_WIDGET_CLASS (parent_class)->style_set (widget, prev_style);
+
+ gtk_widget_style_get (widget, "label-scale", &label_scale, NULL);
+
+ entry = gtk_bin_get_child (GTK_BIN (widget));
+
+ rc_style = gtk_widget_get_modifier_style (GTK_WIDGET (entry));
+
+ if (rc_style->font_desc)
+ pango_font_description_free (rc_style->font_desc);
+
+ context = gtk_widget_get_pango_context (widget);
+ font_desc = pango_context_get_font_description (context);
+ rc_style->font_desc = pango_font_description_copy (font_desc);
+
+ font_size = pango_font_description_get_size (rc_style->font_desc);
+ pango_font_description_set_size (rc_style->font_desc, label_scale * font_size);
+
+ gtk_widget_modify_style (GTK_WIDGET (entry), rc_style);
+}
+
+static void
+gimp_scale_combo_box_changed (GimpScaleComboBox *combo_box)
+{
+ GtkTreeIter iter;
+
+ if (gtk_combo_box_get_active_iter (GTK_COMBO_BOX (combo_box), &iter))
+ {
+ GtkTreeModel *model = gtk_combo_box_get_model (GTK_COMBO_BOX (combo_box));
+ gdouble scale;
+
+ gtk_tree_model_get (model, &iter,
+ COLUMN_SCALE, &scale,
+ -1);
+ if (scale > 0.0)
+ {
+ combo_box->scale = scale;
+
+ if (combo_box->last_path)
+ gtk_tree_path_free (combo_box->last_path);
+
+ combo_box->last_path = gtk_tree_model_get_path (model, &iter);
+ }
+ }
+}
+
+static gboolean
+gimp_scale_combo_box_parse_text (const gchar *text,
+ gdouble *scale)
+{
+ gchar *end;
+ gdouble left_number;
+ gdouble right_number;
+
+ /* try to parse a number */
+ left_number = strtod (text, &end);
+
+ if (end == text)
+ return FALSE;
+ else
+ text = end;
+
+ /* skip over whitespace */
+ while (g_unichar_isspace (g_utf8_get_char (text)))
+ text = g_utf8_next_char (text);
+
+ if (*text == '\0' || *text == '%')
+ {
+ *scale = left_number / 100.0;
+ return TRUE;
+ }
+
+ /* check for a valid separator */
+ if (*text != '/' && *text != ':')
+ {
+ *scale = left_number;
+ return TRUE;
+ }
+
+ text = g_utf8_next_char (text);
+
+ /* skip over whitespace */
+ while (g_unichar_isspace (g_utf8_get_char (text)))
+ text = g_utf8_next_char (text);
+
+ /* try to parse another number */
+ right_number = strtod (text, &end);
+
+ if (end == text)
+ return FALSE;
+
+ if (right_number == 0.0)
+ return FALSE;
+
+ *scale = left_number / right_number;
+ return TRUE;
+}
+
+static void
+gimp_scale_combo_box_entry_activate (GtkWidget *entry,
+ GimpScaleComboBox *combo_box)
+{
+ const gchar *text = gtk_entry_get_text (GTK_ENTRY (entry));
+ gdouble scale;
+
+ if (gimp_scale_combo_box_parse_text (text, &scale) &&
+ scale >= 1.0 / 256.0 &&
+ scale <= 256.0)
+ {
+ gimp_scale_combo_box_set_scale (combo_box, scale);
+ }
+ else
+ {
+ gtk_widget_error_bell (entry);
+
+ gimp_scale_combo_box_set_scale (combo_box, combo_box->scale);
+ }
+
+ g_signal_emit (combo_box, scale_combo_box_signals[ENTRY_ACTIVATED], 0);
+}
+
+static gboolean
+gimp_scale_combo_box_entry_key_press (GtkWidget *entry,
+ GdkEventKey *event,
+ GimpScaleComboBox *combo_box)
+{
+ if (event->keyval == GDK_KEY_Escape)
+ {
+ gimp_scale_combo_box_set_scale (combo_box, combo_box->scale);
+
+ g_signal_emit (combo_box, scale_combo_box_signals[ENTRY_ACTIVATED], 0);
+
+ return TRUE;
+ }
+
+ if (event->keyval == GDK_KEY_Tab ||
+ event->keyval == GDK_KEY_KP_Tab ||
+ event->keyval == GDK_KEY_ISO_Left_Tab)
+ {
+ gimp_scale_combo_box_entry_activate (entry, combo_box);
+
+ return TRUE;
+ }
+
+ return FALSE;
+}
+
+static void
+gimp_scale_combo_box_scale_iter_set (GtkListStore *store,
+ GtkTreeIter *iter,
+ gdouble scale,
+ gboolean persistent)
+{
+ gchar label[32];
+
+#ifdef G_OS_WIN32
+
+ /* use a normal space until pango's windows backend uses harfbuzz,
+ * see bug #735505
+ */
+#define PERCENT_SPACE " "
+
+#else
+
+ /* use U+2009 THIN SPACE to separate the percent sign from the number */
+#define PERCENT_SPACE "\342\200\211"
+
+#endif
+
+ if (scale > 1.0)
+ g_snprintf (label, sizeof (label),
+ "%d" PERCENT_SPACE "%%", (gint) ROUND (100.0 * scale));
+ else
+ g_snprintf (label, sizeof (label),
+ "%.3g" PERCENT_SPACE "%%", 100.0 * scale);
+
+ gtk_list_store_set (store, iter,
+ COLUMN_SCALE, scale,
+ COLUMN_LABEL, label,
+ COLUMN_PERSISTENT, persistent,
+ -1);
+}
+
+static void
+gimp_scale_combo_box_mru_add (GimpScaleComboBox *combo_box,
+ GtkTreeIter *iter)
+{
+ GtkTreeModel *model = gtk_combo_box_get_model (GTK_COMBO_BOX (combo_box));
+ GtkTreePath *path = gtk_tree_model_get_path (model, iter);
+ GList *list;
+ gboolean found;
+
+ for (list = combo_box->mru, found = FALSE; list && !found; list = list->next)
+ {
+ GtkTreePath *this = gtk_tree_row_reference_get_path (list->data);
+
+ if (gtk_tree_path_compare (this, path) == 0)
+ {
+ if (list->prev)
+ {
+ combo_box->mru = g_list_remove_link (combo_box->mru, list);
+ combo_box->mru = g_list_concat (list, combo_box->mru);
+ }
+
+ found = TRUE;
+ }
+
+ gtk_tree_path_free (this);
+ }
+
+ if (! found)
+ combo_box->mru = g_list_prepend (combo_box->mru,
+ gtk_tree_row_reference_new (model, path));
+
+ gtk_tree_path_free (path);
+}
+
+static void
+gimp_scale_combo_box_mru_remove_last (GimpScaleComboBox *combo_box)
+{
+ GtkTreeModel *model;
+ GtkTreePath *path;
+ GList *last;
+ GtkTreeIter iter;
+
+ if (! combo_box->mru)
+ return;
+
+ model = gtk_combo_box_get_model (GTK_COMBO_BOX (combo_box));
+
+ last = g_list_last (combo_box->mru);
+ path = gtk_tree_row_reference_get_path (last->data);
+
+ if (gtk_tree_model_get_iter (model, &iter, path))
+ {
+ gtk_list_store_remove (GTK_LIST_STORE (model), &iter);
+ gtk_tree_row_reference_free (last->data);
+ combo_box->mru = g_list_delete_link (combo_box->mru, last);
+ }
+
+ gtk_tree_path_free (path);
+}
+
+
+/**
+ * gimp_scale_combo_box_new:
+ *
+ * Return value: a new #GimpScaleComboBox.
+ **/
+GtkWidget *
+gimp_scale_combo_box_new (void)
+{
+ return g_object_new (GIMP_TYPE_SCALE_COMBO_BOX,
+ "has-entry", TRUE,
+ NULL);
+}
+
+void
+gimp_scale_combo_box_set_scale (GimpScaleComboBox *combo_box,
+ gdouble scale)
+{
+ GtkTreeModel *model;
+ GtkListStore *store;
+ GtkWidget *entry;
+ GtkTreeIter iter;
+ gboolean iter_valid;
+ gboolean persistent;
+ gint n_digits;
+
+ g_return_if_fail (GIMP_IS_SCALE_COMBO_BOX (combo_box));
+ g_return_if_fail (scale > 0.0);
+
+ model = gtk_combo_box_get_model (GTK_COMBO_BOX (combo_box));
+ store = GTK_LIST_STORE (model);
+
+ for (iter_valid = gtk_tree_model_get_iter_first (model, &iter);
+ iter_valid;
+ iter_valid = gtk_tree_model_iter_next (model, &iter))
+ {
+ gdouble this;
+
+ gtk_tree_model_get (model, &iter,
+ COLUMN_SCALE, &this,
+ -1);
+
+ if (fabs (this - scale) < 0.0001)
+ break;
+ }
+
+ if (! iter_valid)
+ {
+ GtkTreeIter sibling;
+
+ for (iter_valid = gtk_tree_model_get_iter_first (model, &sibling);
+ iter_valid;
+ iter_valid = gtk_tree_model_iter_next (model, &sibling))
+ {
+ gdouble this;
+
+ gtk_tree_model_get (model, &sibling,
+ COLUMN_SCALE, &this,
+ -1);
+
+ if (this < scale)
+ break;
+ }
+
+ gtk_list_store_insert_before (store, &iter, iter_valid ? &sibling : NULL);
+ gimp_scale_combo_box_scale_iter_set (store, &iter, scale, FALSE);
+ }
+
+ gtk_combo_box_set_active_iter (GTK_COMBO_BOX (combo_box), &iter);
+
+ gtk_tree_model_get (model, &iter,
+ COLUMN_PERSISTENT, &persistent,
+ -1);
+ if (! persistent)
+ {
+ gimp_scale_combo_box_mru_add (combo_box, &iter);
+
+ if (gtk_tree_model_iter_n_children (model, NULL) > MAX_ITEMS)
+ gimp_scale_combo_box_mru_remove_last (combo_box);
+ }
+
+ /* Update entry size appropriately. */
+ entry = gtk_bin_get_child (GTK_BIN (combo_box));
+ n_digits = (gint) floor (log10 (scale) + 1);
+
+ g_object_set (entry,
+ "width-chars", MAX (5, n_digits + 4),
+ NULL);
+}
+
+gdouble
+gimp_scale_combo_box_get_scale (GimpScaleComboBox *combo_box)
+{
+ g_return_val_if_fail (GIMP_IS_SCALE_COMBO_BOX (combo_box), 1.0);
+
+ return combo_box->scale;
+}