diff options
Diffstat (limited to 'app/display/gimpscalecombobox.c')
| -rw-r--r-- | app/display/gimpscalecombobox.c | 562 |
1 files changed, 562 insertions, 0 deletions
diff --git a/app/display/gimpscalecombobox.c b/app/display/gimpscalecombobox.c new file mode 100644 index 0000000..3a5bba0 --- /dev/null +++ b/app/display/gimpscalecombobox.c @@ -0,0 +1,562 @@ +/* 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; +} |