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| -rw-r--r-- | libgimpwidgets/gimpnumberpairentry.c | 1301 |
1 files changed, 1301 insertions, 0 deletions
diff --git a/libgimpwidgets/gimpnumberpairentry.c b/libgimpwidgets/gimpnumberpairentry.c new file mode 100644 index 0000000..c41fda7 --- /dev/null +++ b/libgimpwidgets/gimpnumberpairentry.c @@ -0,0 +1,1301 @@ +/* LIBGIMP - The GIMP Library + * Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball + * + * gimpnumberpairentry.c + * Copyright (C) 2006 Simon Budig <simon@gimp.org> + * Copyright (C) 2007 Sven Neumann <sven@gimp.org> + * Copyright (C) 2007 Martin Nordholts <martin@svn.gnome.org> + * + * This library is free software: you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 3 of the License, or (at your option) any later version. + * + * This library 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 + * Library General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library. If not, see + * <https://www.gnu.org/licenses/>. + */ + +#include "config.h" + +#include <stdlib.h> +#include <string.h> + +#include <gtk/gtk.h> +#include <gdk/gdkkeysyms.h> + +#include "libgimpmath/gimpmath.h" + +#include "gimpwidgetstypes.h" + +#include "gimpicons.h" +#include "gimpnumberpairentry.h" + + +/** + * SECTION: gimpnumberpairentry + * @title: GimpNumberPairEntry + * @short_description: A #GtkEntry subclass to enter ratios. + * + * A #GtkEntry subclass to enter ratios. + **/ + + +#define EPSILON 0.000001 + + +enum +{ + NUMBERS_CHANGED, + RATIO_CHANGED, + LAST_SIGNAL +}; + +enum +{ + PROP_0, + PROP_LEFT_NUMBER, + PROP_RIGHT_NUMBER, + PROP_DEFAULT_LEFT_NUMBER, + PROP_DEFAULT_RIGHT_NUMBER, + PROP_USER_OVERRIDE, + PROP_SEPARATORS, + PROP_DEFAULT_TEXT, + PROP_ALLOW_SIMPLIFICATION, + PROP_MIN_VALID_VALUE, + PROP_MAX_VALID_VALUE, + PROP_RATIO, + PROP_ASPECT +}; + +typedef enum +{ + PARSE_VALID, + PARSE_CLEAR, + PARSE_INVALID +} ParseResult; + +typedef struct +{ + /* The current number pair displayed in the widget. */ + gdouble left_number; + gdouble right_number; + + /* What number pair that should be displayed when not in + user_override mode. */ + gdouble default_left_number; + gdouble default_right_number; + + /* Whether or not the current value in the entry has been explicitly + * set by the user. + */ + gboolean user_override; + + /* Is the font style currently set to ITALIC or NORMAL ? */ + gboolean font_italic; + + /* What separators that are valid when parsing input, e.g. when the + * widget is used for aspect ratio, valid separators are typically + * ':' and '/'. + */ + gunichar *separators; + glong num_separators; + + /* A string to be shown in the entry when in automatic mode */ + gchar *default_text; + + /* Whether or to not to divide the numbers with the greatest common + * divisor when input ends in '='. + */ + gboolean allow_simplification; + + /* What range of values considered valid. */ + gdouble min_valid_value; + gdouble max_valid_value; +} GimpNumberPairEntryPrivate; + +#define GIMP_NUMBER_PAIR_ENTRY_GET_PRIVATE(obj) \ + ((GimpNumberPairEntryPrivate *) ((GimpNumberPairEntry *) (obj))->priv) + + +static void gimp_number_pair_entry_finalize (GObject *entry); + +static gboolean gimp_number_pair_entry_valid_separator (GimpNumberPairEntry *entry, + gunichar candidate); +static void gimp_number_pair_entry_ratio_to_fraction (gdouble ratio, + gdouble *numerator, + gdouble *denominator); + +static void gimp_number_pair_entry_set_property (GObject *object, + guint property_id, + const GValue *value, + GParamSpec *pspec); +static void gimp_number_pair_entry_get_property (GObject *object, + guint property_id, + GValue *value, + GParamSpec *pspec); +static void gimp_number_pair_entry_changed (GimpNumberPairEntry *entry); +static void gimp_number_pair_entry_icon_press (GimpNumberPairEntry *entry); +static gboolean gimp_number_pair_entry_events (GtkWidget *widget, + GdkEvent *event); + +static void gimp_number_pair_entry_update_text (GimpNumberPairEntry *entry); + +static ParseResult gimp_number_pair_entry_parse_text (GimpNumberPairEntry *entry, + const gchar *text, + gdouble *left_value, + gdouble *right_value); +static gboolean gimp_number_pair_entry_numbers_in_range (GimpNumberPairEntry *entry, + gdouble left_number, + gdouble right_number); + +static gchar * gimp_number_pair_entry_strdup_number_pair_string + (GimpNumberPairEntry *entry, + gdouble left_number, + gdouble right_number); + + + +G_DEFINE_TYPE_WITH_PRIVATE (GimpNumberPairEntry, gimp_number_pair_entry, + GTK_TYPE_ENTRY) + + +#define parent_class gimp_number_pair_entry_parent_class + +/* What the user shall end the input with when simplification is desired. */ +#define SIMPLIFICATION_CHAR ((gunichar) '=') + +#define DEFAULT_SEPARATOR ((gunichar) ',') + + +static guint entry_signals[LAST_SIGNAL] = { 0 }; + + +static void +gimp_number_pair_entry_class_init (GimpNumberPairEntryClass *klass) +{ + GObjectClass *object_class = G_OBJECT_CLASS (klass); + + entry_signals[NUMBERS_CHANGED] = + g_signal_new ("numbers-changed", + G_TYPE_FROM_CLASS (klass), + G_SIGNAL_RUN_FIRST, + G_STRUCT_OFFSET (GimpNumberPairEntryClass, numbers_changed), + NULL, NULL, + g_cclosure_marshal_VOID__VOID, + G_TYPE_NONE, 0); + + entry_signals[RATIO_CHANGED] = + g_signal_new ("ratio-changed", + G_TYPE_FROM_CLASS (klass), + G_SIGNAL_RUN_FIRST, + G_STRUCT_OFFSET (GimpNumberPairEntryClass, ratio_changed), + NULL, NULL, + g_cclosure_marshal_VOID__VOID, + G_TYPE_NONE, 0); + + object_class->set_property = gimp_number_pair_entry_set_property; + object_class->get_property = gimp_number_pair_entry_get_property; + object_class->finalize = gimp_number_pair_entry_finalize; + + klass->numbers_changed = NULL; + klass->ratio_changed = NULL; + + g_object_class_install_property (object_class, PROP_LEFT_NUMBER, + g_param_spec_double ("left-number", + "Left number", + "The left number", + G_MINDOUBLE, G_MAXDOUBLE, + 100.0, + GIMP_PARAM_READWRITE)); + + g_object_class_install_property (object_class, PROP_RIGHT_NUMBER, + g_param_spec_double ("right-number", + "Right number", + "The right number", + G_MINDOUBLE, G_MAXDOUBLE, + 100.0, + GIMP_PARAM_READWRITE)); + + g_object_class_install_property (object_class, PROP_DEFAULT_LEFT_NUMBER, + g_param_spec_double ("default-left-number", + "Default left number", + "The default left number", + G_MINDOUBLE, G_MAXDOUBLE, + 100.0, + GIMP_PARAM_READWRITE)); + + g_object_class_install_property (object_class, PROP_DEFAULT_RIGHT_NUMBER, + g_param_spec_double ("default-right-number", + "Default right number", + "The default right number", + G_MINDOUBLE, G_MAXDOUBLE, + 100.0, + GIMP_PARAM_READWRITE)); + + g_object_class_install_property (object_class, PROP_USER_OVERRIDE, + g_param_spec_boolean ("user-override", + "User override", + "Whether the widget is in 'user override' mode", + FALSE, + GIMP_PARAM_READWRITE)); + + g_object_class_install_property (object_class, PROP_SEPARATORS, + g_param_spec_string ("separators", + "Separators", + "A string of valid separators", + NULL, + GIMP_PARAM_READWRITE | + G_PARAM_CONSTRUCT_ONLY)); + + g_object_class_install_property (object_class, PROP_DEFAULT_TEXT, + g_param_spec_string ("default-text", + "Default text", + "String to show when in automatic mode", + NULL, + GIMP_PARAM_READWRITE)); + + g_object_class_install_property (object_class, PROP_ALLOW_SIMPLIFICATION, + g_param_spec_boolean ("allow-simplification", + "Allow simplification", + "Whether to allow simplification", + FALSE, + GIMP_PARAM_READWRITE)); + + g_object_class_install_property (object_class, PROP_MIN_VALID_VALUE, + g_param_spec_double ("min-valid-value", + "Min valid value", + "Minimum value valid when parsing input", + G_MINDOUBLE, G_MAXDOUBLE, + G_MINDOUBLE, + GIMP_PARAM_READWRITE)); + + g_object_class_install_property (object_class, PROP_MAX_VALID_VALUE, + g_param_spec_double ("max-valid-value", + "Max valid value", + "Maximum value valid when parsing input", + G_MINDOUBLE, G_MAXDOUBLE, + G_MAXDOUBLE, + GIMP_PARAM_READWRITE)); + + g_object_class_install_property (object_class, PROP_RATIO, + g_param_spec_double ("ratio", + "Ratio", + "The value as ratio", + G_MINDOUBLE, G_MAXDOUBLE, + 1.0, + GIMP_PARAM_READWRITE)); + + g_object_class_install_property (object_class, PROP_ASPECT, + g_param_spec_enum ("aspect", + "Aspect", + "The value as aspect", + GIMP_TYPE_ASPECT_TYPE, + GIMP_ASPECT_SQUARE, + GIMP_PARAM_READWRITE)); +} + +static void +gimp_number_pair_entry_init (GimpNumberPairEntry *entry) +{ + GimpNumberPairEntryPrivate *priv; + + entry->priv = gimp_number_pair_entry_get_instance_private (entry); + + priv = GIMP_NUMBER_PAIR_ENTRY_GET_PRIVATE (entry); + + priv->left_number = 1.0; + priv->right_number = 1.0; + priv->default_left_number = 1.0; + priv->default_right_number = 1.0; + priv->user_override = FALSE; + priv->font_italic = FALSE; + priv->separators = NULL; + priv->default_text = NULL; + priv->num_separators = 0; + priv->allow_simplification = FALSE; + priv->min_valid_value = G_MINDOUBLE; + priv->max_valid_value = G_MAXDOUBLE; + + g_signal_connect (entry, "changed", + G_CALLBACK (gimp_number_pair_entry_changed), + NULL); + g_signal_connect (entry, "icon-press", + G_CALLBACK (gimp_number_pair_entry_icon_press), + NULL); + g_signal_connect (entry, "focus-out-event", + G_CALLBACK (gimp_number_pair_entry_events), + NULL); + g_signal_connect (entry, "key-press-event", + G_CALLBACK (gimp_number_pair_entry_events), + NULL); + + gtk_widget_set_direction (GTK_WIDGET (entry), GTK_TEXT_DIR_LTR); + + gtk_entry_set_icon_from_icon_name (GTK_ENTRY (entry), + GTK_ENTRY_ICON_SECONDARY, + GIMP_ICON_EDIT_CLEAR); +} + +static void +gimp_number_pair_entry_finalize (GObject *object) +{ + GimpNumberPairEntryPrivate *priv; + + priv = GIMP_NUMBER_PAIR_ENTRY_GET_PRIVATE (object); + + g_clear_pointer (&priv->separators, g_free); + priv->num_separators = 0; + + g_clear_pointer (&priv->default_text, g_free); + + G_OBJECT_CLASS (parent_class)->finalize (object); +} + +/** + * gimp_number_pair_entry_new: + * @separators: The allowed separators. + * @allow_simplification: Whether to do simplification on the entered term. + * @min_valid_value: The minimum allowed result value. + * @max_valid_value: The maximum allowed result value. + * + * Creates a new #GimpNumberPairEntry widget, which is a GtkEntry that + * accepts two numbers separated by a separator. Typical input example + * with a 'x' separator: "377x233". + * + * The widget supports simplification of the entered ratio when the + * input ends in '=', if "allow-simplification" is TRUE. + * + * The "separators" property contains a string of characters valid as + * separators when parsing input. The first separator is used when + * displaying the current values. + * + * It is possible to specify what range of values that shall be + * considered as valid when parsing user input, by changing + * "min-valid-value" and "max-valid-value". + * + * The first separator of @separators is used to display the current + * value. + * + * Return value: The new #GimpNumberPairEntry widget. + * + * Since: 2.4 + **/ +GtkWidget * +gimp_number_pair_entry_new (const gchar *separators, + gboolean allow_simplification, + gdouble min_valid_value, + gdouble max_valid_value) +{ + return g_object_new (GIMP_TYPE_NUMBER_PAIR_ENTRY, + "separators", separators, + "allow-simplification", allow_simplification, + "min-valid-value", min_valid_value, + "max-valid-value", max_valid_value, + NULL); +} + +static void +gimp_number_pair_entry_ratio_to_fraction (gdouble ratio, + gdouble *numerator, + gdouble *denominator) +{ + gdouble remainder, next_cf; + gint p0, p1, p2; + gint q0, q1, q2; + + /* calculate the continued fraction to approximate the desired ratio */ + + p0 = 1; + q0 = 0; + p1 = floor (ratio); + q1 = 1; + + remainder = ratio - p1; + + while (fabs (remainder) >= 0.0001 && + fabs (((gdouble) p1 / q1) - ratio) > 0.0001) + { + remainder = 1.0 / remainder; + + next_cf = floor (remainder); + + p2 = next_cf * p1 + p0; + q2 = next_cf * q1 + q0; + + /* remember the last two fractions */ + p0 = p1; + q0 = q1; + p1 = p2; + q1 = q2; + + remainder = remainder - next_cf; + } + + /* only use the calculated fraction if it is "reasonable" */ + if (p1 < 1000 && q1 < 1000) + { + *numerator = p1; + *denominator = q1; + } + else + { + *numerator = ratio; + *denominator = 1.0; + } +} + +/** + * gimp_number_pair_entry_set_ratio: + * @entry: A #GimpNumberPairEntry widget. + * @ratio: Ratio to set in the widget. + * + * Sets the numbers of the #GimpNumberPairEntry to have the desired + * ratio. If the new ratio is different than the previous ratio, the + * "ratio-changed" signal is emitted. + * + * An attempt is made to convert the decimal number into a fraction + * with left_number and right_number < 1000. + * + * Since: 2.4 + **/ +void +gimp_number_pair_entry_set_ratio (GimpNumberPairEntry *entry, + gdouble ratio) +{ + gdouble numerator; + gdouble denominator; + + g_return_if_fail (GIMP_IS_NUMBER_PAIR_ENTRY (entry)); + + gimp_number_pair_entry_ratio_to_fraction (ratio, &numerator, &denominator); + + gimp_number_pair_entry_set_values (entry, numerator, denominator); +} + +/** + * gimp_number_pair_entry_get_ratio: + * @entry: A #GimpNumberPairEntry widget. + * + * Retrieves the ratio of the numbers displayed by a #GimpNumberPairEntry. + * + * Returns: The ratio value. + * + * Since: 2.4 + **/ +gdouble +gimp_number_pair_entry_get_ratio (GimpNumberPairEntry *entry) +{ + GimpNumberPairEntryPrivate *priv; + + g_return_val_if_fail (GIMP_IS_NUMBER_PAIR_ENTRY (entry), 1.0); + + priv = GIMP_NUMBER_PAIR_ENTRY_GET_PRIVATE (entry); + + return priv->left_number / priv->right_number; +} + +/** + * gimp_number_pair_entry_set_values: + * @entry: A #GimpNumberPairEntry widget. + * @left: Left number in the entry. + * @right: Right number in the entry. + * + * Forces setting the numbers displayed by a #GimpNumberPairEntry, + * ignoring if the user has set his/her own value. The state of + * user-override will not be changed. + * + * Since: 2.4 + **/ +void +gimp_number_pair_entry_set_values (GimpNumberPairEntry *entry, + gdouble left, + gdouble right) +{ + GimpNumberPairEntryPrivate *priv; + GimpAspectType old_aspect; + gdouble old_ratio; + gdouble old_left_number; + gdouble old_right_number; + gboolean numbers_changed = FALSE; + gboolean ratio_changed = FALSE; + + g_return_if_fail (GIMP_IS_NUMBER_PAIR_ENTRY (entry)); + + priv = GIMP_NUMBER_PAIR_ENTRY_GET_PRIVATE (entry); + + /* Store current values */ + + old_left_number = priv->left_number; + old_right_number = priv->right_number; + old_ratio = gimp_number_pair_entry_get_ratio (entry); + old_aspect = gimp_number_pair_entry_get_aspect (entry); + + + /* Freeze notification */ + + g_object_freeze_notify (G_OBJECT (entry)); + + + /* Set the new numbers and update the entry */ + + priv->left_number = left; + priv->right_number = right; + + g_object_notify (G_OBJECT (entry), "left-number"); + g_object_notify (G_OBJECT (entry), "right-number"); + + gimp_number_pair_entry_update_text (entry); + + + /* Find out what has changed */ + + if (fabs (old_ratio - gimp_number_pair_entry_get_ratio (entry)) > EPSILON) + { + g_object_notify (G_OBJECT (entry), "ratio"); + + ratio_changed = TRUE; + + if (old_aspect != gimp_number_pair_entry_get_aspect (entry)) + g_object_notify (G_OBJECT (entry), "aspect"); + } + + if (old_left_number != priv->left_number || + old_right_number != priv->right_number) + { + numbers_changed = TRUE; + } + + + /* Thaw */ + + g_object_thaw_notify (G_OBJECT (entry)); + + + /* Emit relevant signals */ + + if (numbers_changed) + g_signal_emit (entry, entry_signals[NUMBERS_CHANGED], 0); + + if (ratio_changed) + g_signal_emit (entry, entry_signals[RATIO_CHANGED], 0); +} + +/** + * gimp_number_pair_entry_get_values: + * @entry: A #GimpNumberPairEntry widget. + * @left: Pointer of where to store the left number (may be %NULL). + * @right: Pointer of to store the right number (may be %NULL). + * + * Gets the numbers displayed by a #GimpNumberPairEntry. + * + * Since: 2.4 + **/ +void +gimp_number_pair_entry_get_values (GimpNumberPairEntry *entry, + gdouble *left, + gdouble *right) +{ + GimpNumberPairEntryPrivate *priv; + + g_return_if_fail (GIMP_IS_NUMBER_PAIR_ENTRY (entry)); + + priv = GIMP_NUMBER_PAIR_ENTRY_GET_PRIVATE (entry); + + if (left != NULL) + *left = priv->left_number; + + if (right != NULL) + *right = priv->right_number; +} + +/** + * gimp_number_pair_entry_set_default_text: + * @entry: A #GimpNumberPairEntry widget. + * @string: Default string. + * + * Causes the entry to show a given string when in automatic mode, + * instead of the default numbers. The only thing this does is making + * the #GimpNumberPairEntry showing this string, the internal state + * and API calls are not affected. + * + * Set the default string to %NULL to display default values as + * normal. + * + * Since: 2.4 + */ +void +gimp_number_pair_entry_set_default_text (GimpNumberPairEntry *entry, + const gchar *string) +{ + GimpNumberPairEntryPrivate *priv; + + g_return_if_fail (GIMP_IS_NUMBER_PAIR_ENTRY (entry)); + + priv = GIMP_NUMBER_PAIR_ENTRY_GET_PRIVATE (entry); + + g_free (priv->default_text); + priv->default_text = g_strdup (string); + + gimp_number_pair_entry_update_text (entry); + + g_object_notify (G_OBJECT (entry), "default-text"); +} + +/** + * gimp_number_pair_entry_get_default_text: + * @entry: A #GimpNumberPairEntry widget. + * + * Returns: the string manually set to be shown, or %NULL if values are + * shown in a normal fashion. + * + * Since: 2.4 + */ +const gchar * +gimp_number_pair_entry_get_default_text (GimpNumberPairEntry *entry) +{ + GimpNumberPairEntryPrivate *priv; + + g_return_val_if_fail (GIMP_IS_NUMBER_PAIR_ENTRY (entry), NULL); + + priv = GIMP_NUMBER_PAIR_ENTRY_GET_PRIVATE (entry); + + return priv->default_text; +} + +/** + * gimp_number_pair_entry_set_aspect: + * @entry: A #GimpNumberPairEntry widget. + * @aspect: The new aspect. + * + * Sets the aspect of the ratio by swapping the left_number and + * right_number if necessary (or setting them to 1.0 in case that + * @aspect is %GIMP_ASPECT_SQUARE). + * + * Since: 2.4 + **/ +void +gimp_number_pair_entry_set_aspect (GimpNumberPairEntry *entry, + GimpAspectType aspect) +{ + GimpNumberPairEntryPrivate *priv; + + g_return_if_fail (GIMP_IS_NUMBER_PAIR_ENTRY (entry)); + + if (gimp_number_pair_entry_get_aspect (entry) == aspect) + return; + + priv = GIMP_NUMBER_PAIR_ENTRY_GET_PRIVATE (entry); + + switch (aspect) + { + case GIMP_ASPECT_SQUARE: + gimp_number_pair_entry_set_values (entry, + priv->left_number, + priv->left_number); + break; + + case GIMP_ASPECT_LANDSCAPE: + case GIMP_ASPECT_PORTRAIT: + gimp_number_pair_entry_set_values (entry, + priv->right_number, + priv->left_number); + break; + } +} + +/** + * gimp_number_pair_entry_get_aspect: + * @entry: A #GimpNumberPairEntry widget. + * + * Gets the aspect of the ratio displayed by a #GimpNumberPairEntry. + * + * Returns: The entry's current aspect. + * + * Since: 2.4 + **/ +GimpAspectType +gimp_number_pair_entry_get_aspect (GimpNumberPairEntry *entry) +{ + GimpNumberPairEntryPrivate *priv; + + g_return_val_if_fail (GIMP_IS_NUMBER_PAIR_ENTRY (entry), GIMP_ASPECT_SQUARE); + + priv = GIMP_NUMBER_PAIR_ENTRY_GET_PRIVATE (entry); + + if (priv->left_number > priv->right_number) + { + return GIMP_ASPECT_LANDSCAPE; + } + else if (priv->left_number < priv->right_number) + { + return GIMP_ASPECT_PORTRAIT; + } + else + { + return GIMP_ASPECT_SQUARE; + } +} + +static void +gimp_number_pair_entry_modify_font (GimpNumberPairEntry *entry, + gboolean italic) +{ + GimpNumberPairEntryPrivate *priv = GIMP_NUMBER_PAIR_ENTRY_GET_PRIVATE (entry); + GtkRcStyle *rc_style; + + if (priv->font_italic == italic) + return; + + rc_style = gtk_widget_get_modifier_style (GTK_WIDGET (entry)); + + if (! rc_style->font_desc) + { + PangoContext *context; + PangoFontDescription *font_desc; + + context = gtk_widget_get_pango_context (GTK_WIDGET (entry)); + font_desc = pango_context_get_font_description (context); + + rc_style->font_desc = pango_font_description_copy (font_desc); + } + + pango_font_description_set_style (rc_style->font_desc, + italic ? + PANGO_STYLE_ITALIC : PANGO_STYLE_NORMAL); + + gtk_widget_modify_style (GTK_WIDGET (entry), rc_style); + + gtk_entry_set_icon_sensitive (GTK_ENTRY (entry), + GTK_ENTRY_ICON_SECONDARY, + ! italic); + + priv->font_italic = italic; +} + + +/** + * gimp_number_pair_entry_set_user_override: + * @entry: A #GimpNumberPairEntry widget. + * @user_override: %TRUE sets the entry in user overridden mode, + * %FALSE disables. + * + * When the entry is not in user overridden mode, the values will + * change when the default values are changed. When in user overridden + * mode, setting default values will not affect the active values. + * + * Since: 2.4 + **/ +void +gimp_number_pair_entry_set_user_override (GimpNumberPairEntry *entry, + gboolean user_override) +{ + GimpNumberPairEntryPrivate *priv; + + g_return_if_fail (GIMP_IS_NUMBER_PAIR_ENTRY (entry)); + + priv = GIMP_NUMBER_PAIR_ENTRY_GET_PRIVATE (entry); + + priv->user_override = user_override; + + if (! user_override) + { + gimp_number_pair_entry_set_default_values (entry, + priv->default_left_number, + priv->default_right_number); + } + + gimp_number_pair_entry_modify_font (entry, ! user_override); + + g_object_notify (G_OBJECT (entry), "user-override"); +} + +/** + * gimp_number_pair_entry_get_user_override: + * @entry: A #GimpNumberPairEntry widget. + * + * Returns: Whether or not the the widget is in user overridden mode. + * + * Since: 2.4 + **/ +gboolean +gimp_number_pair_entry_get_user_override (GimpNumberPairEntry *entry) +{ + GimpNumberPairEntryPrivate *priv; + + g_return_val_if_fail (GIMP_IS_NUMBER_PAIR_ENTRY (entry), FALSE); + + priv = GIMP_NUMBER_PAIR_ENTRY_GET_PRIVATE (entry); + + return priv->user_override; +} + +static void +gimp_number_pair_entry_changed (GimpNumberPairEntry *entry) +{ + gimp_number_pair_entry_modify_font (entry, FALSE); +} + +static void +gimp_number_pair_entry_icon_press (GimpNumberPairEntry *entry) +{ + gimp_number_pair_entry_set_user_override (entry, FALSE); + + gtk_editable_set_position (GTK_EDITABLE (entry), -1); +} + +static gboolean +gimp_number_pair_entry_events (GtkWidget *widget, + GdkEvent *event) +{ + GimpNumberPairEntry *entry; + GimpNumberPairEntryPrivate *priv; + gboolean force_user_override; + + entry = GIMP_NUMBER_PAIR_ENTRY (widget); + priv = GIMP_NUMBER_PAIR_ENTRY_GET_PRIVATE (entry); + force_user_override = FALSE; + + switch (event->type) + { + case GDK_KEY_PRESS: + { + GdkEventKey *kevent = (GdkEventKey *) event; + + if (kevent->keyval != GDK_KEY_Return && + kevent->keyval != GDK_KEY_KP_Enter && + kevent->keyval != GDK_KEY_ISO_Enter) + break; + + /* If parsing was done due to widgets focus being lost, we only change + * to user-override mode if the values differ from the default ones. If + * Return was pressed however, we always switch to user-override mode. + */ + force_user_override = TRUE; + } + /* Fall through */ + + case GDK_FOCUS_CHANGE: + { + const gchar *text; + ParseResult parse_result; + gdouble left_value; + gdouble right_value; + + text = gtk_entry_get_text (GTK_ENTRY (entry)); + + parse_result = gimp_number_pair_entry_parse_text (entry, + text, + &left_value, + &right_value); + switch (parse_result) + { + case PARSE_VALID: + { + if (priv->left_number != left_value || + priv->right_number != right_value || + force_user_override) + { + gimp_number_pair_entry_set_values (entry, + left_value, + right_value); + + gimp_number_pair_entry_set_user_override (entry, TRUE); + } + } + break; + + case PARSE_CLEAR: + gimp_number_pair_entry_set_user_override (entry, FALSE); + break; + + default: + break; + } + + /* Make sure the entry text is up to date */ + + gimp_number_pair_entry_update_text (entry); + + gtk_editable_set_position (GTK_EDITABLE (entry), -1); + } + break; + + default: + break; + } + + return FALSE; +} + +/** + * gimp_number_pair_entry_strdup_number_pair_string: + * @entry: + * @left_number: + * @right_number: + * + * Returns: allocated data, must be g_free:d. + **/ +static gchar * +gimp_number_pair_entry_strdup_number_pair_string (GimpNumberPairEntry *entry, + gdouble left_number, + gdouble right_number) +{ + GimpNumberPairEntryPrivate *priv = GIMP_NUMBER_PAIR_ENTRY_GET_PRIVATE (entry); + gchar sep[8]; + gint len; + + if (priv->num_separators > 0) + len = g_unichar_to_utf8 (priv->separators[0], sep); + else + len = g_unichar_to_utf8 (DEFAULT_SEPARATOR, sep); + + sep[len] = '\0'; + + return g_strdup_printf ("%g%s%g", left_number, sep, right_number); +} + +static void +gimp_number_pair_entry_update_text (GimpNumberPairEntry *entry) +{ + GimpNumberPairEntryPrivate *priv = GIMP_NUMBER_PAIR_ENTRY_GET_PRIVATE (entry); + gchar *buffer; + + if (! priv->user_override && + priv->default_text != NULL) + { + /* Instead of the numbers, show the string explicitly set by a + * client to show when in automatic mode. + */ + buffer = g_strdup (priv->default_text); + } + else + { + buffer = gimp_number_pair_entry_strdup_number_pair_string (entry, + priv->left_number, + priv->right_number); + } + + g_signal_handlers_block_by_func (entry, + gimp_number_pair_entry_changed, NULL); + + gtk_entry_set_text (GTK_ENTRY (entry), buffer); + g_free (buffer); + + g_signal_handlers_unblock_by_func (entry, + gimp_number_pair_entry_changed, NULL); + + gimp_number_pair_entry_modify_font (entry, ! priv->user_override); +} + +static gboolean +gimp_number_pair_entry_valid_separator (GimpNumberPairEntry *entry, + gunichar candidate) +{ + GimpNumberPairEntryPrivate *priv = GIMP_NUMBER_PAIR_ENTRY_GET_PRIVATE (entry); + + if (priv->num_separators > 0) + { + gint i; + + for (i = 0; i < priv->num_separators; i++) + if (priv->separators[i] == candidate) + return TRUE; + } + else if (candidate == DEFAULT_SEPARATOR) + { + return TRUE; + } + + return FALSE; +} + +static ParseResult +gimp_number_pair_entry_parse_text (GimpNumberPairEntry *entry, + const gchar *text, + gdouble *left_value, + gdouble *right_value) +{ + GimpNumberPairEntryPrivate *priv = GIMP_NUMBER_PAIR_ENTRY_GET_PRIVATE (entry); + + gdouble new_left_number; + gdouble new_right_number; + gboolean simplify = FALSE; + gchar *end; + + /* skip over whitespace */ + while (g_unichar_isspace (g_utf8_get_char (text))) + text = g_utf8_next_char (text); + + /* check if clear */ + if (! *text) + return PARSE_CLEAR; + + /* try to parse a number */ + new_left_number = strtod (text, &end); + + if (end == text) + return PARSE_INVALID; + else + text = end; + + /* skip over whitespace */ + while (g_unichar_isspace (g_utf8_get_char (text))) + text = g_utf8_next_char (text); + + /* check for a valid separator */ + if (! gimp_number_pair_entry_valid_separator (entry, g_utf8_get_char (text))) + return PARSE_INVALID; + else + text = g_utf8_next_char (text); + + /* try to parse another number */ + new_right_number = strtod (text, &end); + + if (end == text) + return PARSE_INVALID; + else + text = end; + + /* skip over whitespace */ + while (g_unichar_isspace (g_utf8_get_char (text))) + text = g_utf8_next_char (text); + + /* check for the simplification char */ + if (g_utf8_get_char (text) == SIMPLIFICATION_CHAR) + { + simplify = priv->allow_simplification; + text = g_utf8_next_char (text); + } + + /* skip over whitespace */ + while (g_unichar_isspace (g_utf8_get_char (text))) + text = g_utf8_next_char (text); + + /* check for trailing garbage */ + if (*text) + return PARSE_INVALID; + + if (! gimp_number_pair_entry_numbers_in_range (entry, + new_left_number, + new_right_number)) + return PARSE_INVALID; + + if (simplify && new_right_number != 0.0) + { + gimp_number_pair_entry_ratio_to_fraction (new_left_number / + new_right_number, + left_value, + right_value); + } + else + { + *left_value = new_left_number; + *right_value = new_right_number; + } + + return PARSE_VALID; +} + +static void +gimp_number_pair_entry_set_property (GObject *object, + guint property_id, + const GValue *value, + GParamSpec *pspec) +{ + GimpNumberPairEntry *entry = GIMP_NUMBER_PAIR_ENTRY (object); + GimpNumberPairEntryPrivate *priv; + + priv = GIMP_NUMBER_PAIR_ENTRY_GET_PRIVATE (entry); + + switch (property_id) + { + case PROP_LEFT_NUMBER: + gimp_number_pair_entry_set_values (entry, + g_value_get_double (value), + priv->right_number); + break; + case PROP_RIGHT_NUMBER: + gimp_number_pair_entry_set_values (entry, + priv->left_number, + g_value_get_double (value)); + break; + case PROP_DEFAULT_LEFT_NUMBER: + gimp_number_pair_entry_set_default_values (entry, + g_value_get_double (value), + priv->default_right_number); + break; + case PROP_DEFAULT_RIGHT_NUMBER: + gimp_number_pair_entry_set_default_values (entry, + priv->default_left_number, + g_value_get_double (value)); + break; + case PROP_USER_OVERRIDE: + gimp_number_pair_entry_set_user_override (entry, + g_value_get_boolean (value)); + break; + case PROP_SEPARATORS: + g_free (priv->separators); + priv->num_separators = 0; + if (g_value_get_string (value)) + priv->separators = g_utf8_to_ucs4 (g_value_get_string (value), -1, + NULL, &priv->num_separators, NULL); + else + priv->separators = NULL; + break; + case PROP_DEFAULT_TEXT: + gimp_number_pair_entry_set_default_text (entry, + g_value_get_string (value)); + break; + case PROP_ALLOW_SIMPLIFICATION: + priv->allow_simplification = g_value_get_boolean (value); + break; + case PROP_MIN_VALID_VALUE: + priv->min_valid_value = g_value_get_double (value); + break; + case PROP_MAX_VALID_VALUE: + priv->max_valid_value = g_value_get_double (value); + break; + case PROP_RATIO: + gimp_number_pair_entry_set_ratio (entry, g_value_get_double (value)); + break; + case PROP_ASPECT: + gimp_number_pair_entry_set_aspect (entry, g_value_get_enum (value)); + break; + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); + break; + } +} + +static void +gimp_number_pair_entry_get_property (GObject *object, + guint property_id, + GValue *value, + GParamSpec *pspec) +{ + GimpNumberPairEntry *entry = GIMP_NUMBER_PAIR_ENTRY (object); + GimpNumberPairEntryPrivate *priv; + + priv = GIMP_NUMBER_PAIR_ENTRY_GET_PRIVATE (entry); + + switch (property_id) + { + case PROP_LEFT_NUMBER: + g_value_set_double (value, priv->left_number); + break; + case PROP_RIGHT_NUMBER: + g_value_set_double (value, priv->right_number); + break; + case PROP_DEFAULT_LEFT_NUMBER: + g_value_set_double (value, priv->default_left_number); + break; + case PROP_DEFAULT_RIGHT_NUMBER: + g_value_set_double (value, priv->default_right_number); + break; + case PROP_USER_OVERRIDE: + g_value_set_boolean (value, priv->user_override); + break; + case PROP_SEPARATORS: + g_value_take_string (value, + g_ucs4_to_utf8 (priv->separators, + priv->num_separators, + NULL, NULL, NULL)); + break; + case PROP_ALLOW_SIMPLIFICATION: + g_value_set_boolean (value, priv->allow_simplification); + break; + case PROP_DEFAULT_TEXT: + g_value_set_string (value, priv->default_text); + break; + case PROP_MIN_VALID_VALUE: + g_value_set_double (value, priv->min_valid_value); + break; + case PROP_MAX_VALID_VALUE: + g_value_set_double (value, priv->max_valid_value); + break; + case PROP_RATIO: + g_value_set_double (value, gimp_number_pair_entry_get_ratio (entry)); + break; + case PROP_ASPECT: + g_value_set_enum (value, gimp_number_pair_entry_get_aspect (entry)); + break; + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); + break; + } +} + +/** + * gimp_number_pair_entry_set_default_values: + * @entry: A #GimpNumberPairEntry widget. + * @left: Default left value in the entry. + * @right: Default right value in the entry. + * + * Since: 2.4 + **/ +void +gimp_number_pair_entry_set_default_values (GimpNumberPairEntry *entry, + gdouble left, + gdouble right) +{ + GimpNumberPairEntryPrivate *priv; + + g_return_if_fail (GIMP_IS_NUMBER_PAIR_ENTRY (entry)); + + priv = GIMP_NUMBER_PAIR_ENTRY_GET_PRIVATE (entry); + + priv->default_left_number = left; + priv->default_right_number = right; + + if (! priv->user_override) + { + gimp_number_pair_entry_set_values (entry, + priv->default_left_number, + priv->default_right_number); + } +} + +/** + * gimp_number_pair_entry_get_default_values: + * @entry: A #GimpNumberPairEntry widget. + * @left: Pointer of where to put left value. + * @right: Pointer of where to put right value. + * + * Since: 2.4 + **/ +void +gimp_number_pair_entry_get_default_values (GimpNumberPairEntry *entry, + gdouble *left, + gdouble *right) +{ + GimpNumberPairEntryPrivate *priv; + + g_return_if_fail (GIMP_IS_NUMBER_PAIR_ENTRY (entry)); + + priv = GIMP_NUMBER_PAIR_ENTRY_GET_PRIVATE (entry); + + if (left != NULL) + *left = priv->default_left_number; + + if (right != NULL) + *right = priv->default_right_number; +} + +static gboolean +gimp_number_pair_entry_numbers_in_range (GimpNumberPairEntry *entry, + gdouble left_number, + gdouble right_number) +{ + GimpNumberPairEntryPrivate *priv = GIMP_NUMBER_PAIR_ENTRY_GET_PRIVATE (entry); + + return (left_number >= priv->min_valid_value && + left_number <= priv->max_valid_value && + right_number >= priv->min_valid_value && + right_number <= priv->max_valid_value); +} |