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PIKApp/libpikawidgets/pikacolorhexentry.c

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/* LIBPIKA - The PIKA Library
* Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
*
* pikacolorhexentry.c
* Copyright (C) 2004 Sven Neumann <sven@gimp.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 <string.h>
#include <gegl.h>
#include <gtk/gtk.h>
#include <gdk/gdkkeysyms.h>
#include "libpikacolor/pikacolor.h"
#include "pikawidgetstypes.h"
#include "pikacellrenderercolor.h"
#include "pikacolorhexentry.h"
#include "pikahelpui.h"
#include "libpika/libpika-intl.h"
/**
* SECTION: pikacolorhexentry
* @title: PikaColorHexEntry
* @short_description: Widget for entering a color's hex triplet.
*
* Widget for entering a color's hex triplet.
**/
enum
{
COLOR_CHANGED,
LAST_SIGNAL
};
enum
{
COLUMN_NAME,
COLUMN_COLOR,
NUM_COLUMNS
};
struct _PikaColorHexEntryPrivate
{
PikaRGB color;
};
#define GET_PRIVATE(obj) (((PikaColorHexEntry *) (obj))->priv)
static void pika_color_hex_entry_constructed (GObject *object);
static gboolean pika_color_hex_entry_events (GtkWidget *widget,
GdkEvent *event);
static gboolean pika_color_hex_entry_events (GtkWidget *widget,
GdkEvent *event);
static gboolean pika_color_hex_entry_matched (GtkEntryCompletion *completion,
GtkTreeModel *model,
GtkTreeIter *iter,
PikaColorHexEntry *entry);
G_DEFINE_TYPE_WITH_PRIVATE (PikaColorHexEntry, pika_color_hex_entry,
GTK_TYPE_ENTRY)
#define parent_class pika_color_hex_entry_parent_class
static guint entry_signals[LAST_SIGNAL] = { 0 };
static void
pika_color_hex_entry_class_init (PikaColorHexEntryClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
entry_signals[COLOR_CHANGED] =
g_signal_new ("color-changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (PikaColorHexEntryClass, color_changed),
NULL, NULL, NULL,
G_TYPE_NONE, 0);
object_class->constructed = pika_color_hex_entry_constructed;
klass->color_changed = NULL;
}
static void
pika_color_hex_entry_init (PikaColorHexEntry *entry)
{
PikaColorHexEntryPrivate *private;
GtkEntryCompletion *completion;
GtkCellRenderer *cell;
GtkListStore *store;
PikaRGB *colors;
const gchar **names;
gint num_colors;
gint i;
entry->priv = pika_color_hex_entry_get_instance_private (entry);
private = GET_PRIVATE (entry);
/* GtkEntry's minimum size is way too large, set a reasonable one
* for our use case
*/
gtk_entry_set_width_chars (GTK_ENTRY (entry), 8);
pika_help_set_help_data (GTK_WIDGET (entry),
_("Hexadecimal color notation as used in HTML and "
"CSS. This entry also accepts CSS color names."),
NULL);
pika_rgba_set (&private->color, 0.0, 0.0, 0.0, 1.0);
store = gtk_list_store_new (NUM_COLUMNS, G_TYPE_STRING, PIKA_TYPE_RGB);
pika_rgb_list_names (&names, &colors, &num_colors);
for (i = 0; i < num_colors; i++)
{
GtkTreeIter iter;
gtk_list_store_append (store, &iter);
gtk_list_store_set (store, &iter,
COLUMN_NAME, names[i],
COLUMN_COLOR, colors + i,
-1);
}
g_free (colors);
g_free (names);
completion = g_object_new (GTK_TYPE_ENTRY_COMPLETION,
"model", store,
NULL);
g_object_unref (store);
cell = pika_cell_renderer_color_new ();
gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (completion), cell, FALSE);
gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT (completion), cell,
"color", COLUMN_COLOR,
NULL);
gtk_entry_completion_set_text_column (completion, COLUMN_NAME);
gtk_entry_set_completion (GTK_ENTRY (entry), completion);
g_object_unref (completion);
g_signal_connect (entry, "focus-out-event",
G_CALLBACK (pika_color_hex_entry_events),
NULL);
g_signal_connect (entry, "key-press-event",
G_CALLBACK (pika_color_hex_entry_events),
NULL);
g_signal_connect (completion, "match-selected",
G_CALLBACK (pika_color_hex_entry_matched),
entry);
}
static void
pika_color_hex_entry_constructed (GObject *object)
{
G_OBJECT_CLASS (parent_class)->constructed (object);
gtk_entry_set_text (GTK_ENTRY (object), "000000");
}
/**
* pika_color_hex_entry_new:
*
* Returns: a new #PikaColorHexEntry widget
*
* Since: 2.2
**/
GtkWidget *
pika_color_hex_entry_new (void)
{
return g_object_new (PIKA_TYPE_COLOR_HEX_ENTRY, NULL);
}
/**
* pika_color_hex_entry_set_color:
* @entry: a #PikaColorHexEntry widget
* @color: pointer to a #PikaRGB
*
* Sets the color displayed by a #PikaColorHexEntry. If the new color
* is different to the previously set color, the "color-changed"
* signal is emitted.
*
* Since: 2.2
**/
void
pika_color_hex_entry_set_color (PikaColorHexEntry *entry,
const PikaRGB *color)
{
PikaColorHexEntryPrivate *private;
g_return_if_fail (PIKA_IS_COLOR_HEX_ENTRY (entry));
g_return_if_fail (color != NULL);
private = GET_PRIVATE (entry);
if (pika_rgb_distance (&private->color, color) > 0.0)
{
gchar buffer[8];
guchar r, g, b;
pika_rgb_set (&private->color, color->r, color->g, color->b);
pika_rgb_clamp (&private->color);
pika_rgb_get_uchar (&private->color, &r, &g, &b);
g_snprintf (buffer, sizeof (buffer), "%.2x%.2x%.2x", r, g, b);
gtk_entry_set_text (GTK_ENTRY (entry), buffer);
/* move cursor to the end */
gtk_editable_set_position (GTK_EDITABLE (entry), -1);
g_signal_emit (entry, entry_signals[COLOR_CHANGED], 0);
}
}
/**
* pika_color_hex_entry_get_color:
* @entry: a #PikaColorHexEntry widget
* @color: (out caller-allocates): pointer to a #PikaRGB
*
* Retrieves the color value displayed by a #PikaColorHexEntry.
*
* Since: 2.2
**/
void
pika_color_hex_entry_get_color (PikaColorHexEntry *entry,
PikaRGB *color)
{
PikaColorHexEntryPrivate *private;
g_return_if_fail (PIKA_IS_COLOR_HEX_ENTRY (entry));
g_return_if_fail (color != NULL);
private = GET_PRIVATE (entry);
*color = private->color;
}
static gboolean
pika_color_hex_entry_events (GtkWidget *widget,
GdkEvent *event)
{
PikaColorHexEntry *entry = PIKA_COLOR_HEX_ENTRY (widget);
PikaColorHexEntryPrivate *private = GET_PRIVATE (entry);
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;
/* else fall through */
}
case GDK_FOCUS_CHANGE:
{
const gchar *text;
gchar buffer[8];
guchar r, g, b;
text = gtk_entry_get_text (GTK_ENTRY (widget));
pika_rgb_get_uchar (&private->color, &r, &g, &b);
g_snprintf (buffer, sizeof (buffer), "%.2x%.2x%.2x", r, g, b);
if (g_ascii_strcasecmp (buffer, text) != 0)
{
PikaRGB color;
gsize len = strlen (text);
if (len > 0 &&
(pika_rgb_parse_hex (&color, text, len) ||
pika_rgb_parse_name (&color, text, -1)))
{
pika_color_hex_entry_set_color (entry, &color);
}
else
{
gtk_entry_set_text (GTK_ENTRY (entry), buffer);
}
}
}
break;
default:
/* do nothing */
break;
}
return FALSE;
}
static gboolean
pika_color_hex_entry_matched (GtkEntryCompletion *completion,
GtkTreeModel *model,
GtkTreeIter *iter,
PikaColorHexEntry *entry)
{
gchar *name;
PikaRGB color;
gtk_tree_model_get (model, iter,
COLUMN_NAME, &name,
-1);
if (pika_rgb_parse_name (&color, name, -1))
pika_color_hex_entry_set_color (entry, &color);
g_free (name);
return TRUE;
}
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