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mutter/clutter/clutter-entry.c
Neil J. Patel c1e84a8f3a 2007-07-26 Neil J. Patel <njp@o-hand.com> 
* clutter/clutter-entry.c: (offset_to_bytes),
	(clutter_entry_ensure_cursor_position),
	(clutter_entry_new_with_text), (clutter_entry_new),
	(clutter_entry_insert_unichar), (clutter_entry_delete_chars):
	Fixed utf8 support so it actually works now, for both inserting and deleting
	chars.
	Fixed positioning of cursor for utf8 chars. Both GString and Pnago need
	bytes (not documented!) for string manipulation, so making sure all values
	were bytes and not char positions fixed the issue.
	Set a default size of 50x50 for the entry, otherwise no chars can be seen
	if the size is not set after creation (which confuses the developer).
2007-07-26 11:31:50 +00:00

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/*
* Clutter.
*
* An OpenGL based 'interactive canvas' library.
*
* Authored By Matthew Allum <mallum@openedhand.com>
* Neil Jagdish Patel <njp@o-hand.com
*
* Copyright (C) 2006 OpenedHand
*
* 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 2 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
* Lesser 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, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/**
* SECTION:clutter-entry
* @short_description: A single line text entry actor
*
* #ClutterEntry is a #ClutterTexture that allows single line text entry.
*
* In order to update the contents of the entry with the text inserted
* by the user you should connect to the ClutterStage::key-press-event and
* forward the #ClutterKeyEvent received by the #ClutterStage to the
* #ClutterEntry you want to update, using clutter_entry_handle_key_event().
*
* #ClutterEntry is available since Clutter 0.4.
*/
#include "config.h"
#include "clutter-entry.h"
#include "clutter-debug.h"
#include "clutter-enum-types.h"
#include "clutter-keysyms.h"
#include "clutter-main.h"
#include "clutter-marshal.h"
#include "clutter-private.h"
#include "clutter-rectangle.h"
#include "clutter-units.h"
#include "pangoclutter.h"
#define DEFAULT_FONT_NAME "Sans 10"
#define ENTRY_CURSOR_WIDTH 1
#define ENTRY_PADDING 5
G_DEFINE_TYPE (ClutterEntry, clutter_entry, CLUTTER_TYPE_ACTOR);
/* Probably move into main */
static PangoClutterFontMap *_font_map = NULL;
static PangoContext *_context = NULL;
enum
{
PROP_0,
PROP_FONT_NAME,
PROP_TEXT,
PROP_COLOR,
PROP_ALIGNMENT, /* FIXME */
PROP_POSITION,
PROP_CURSOR,
PROP_TEXT_VISIBLE,
PROP_MAX_LENGTH,
PROP_ENTRY_PADDING
};
enum
{
TEXT_CHANGED,
CURSOR_EVENT,
ACTIVATE,
LAST_SIGNAL
};
static guint entry_signals[LAST_SIGNAL] = { 0, };
#define CLUTTER_ENTRY_GET_PRIVATE(obj) \
(G_TYPE_INSTANCE_GET_PRIVATE ((obj), CLUTTER_TYPE_ENTRY, ClutterEntryPrivate))
struct _ClutterEntryPrivate
{
PangoContext *context;
PangoFontDescription *desc;
ClutterColor fgcol;
gchar *text;
gchar *font_name;
gboolean text_visible;
gunichar priv_char;
gint extents_width;
gint extents_height;
guint alignment : 2;
guint wrap : 1;
guint use_underline : 1;
guint use_markup : 1;
guint ellipsize : 3;
guint single_line_mode : 1;
guint wrap_mode : 3;
gint position;
gint text_x;
gint max_length;
gint entry_padding;
PangoAttrList *attrs;
PangoAttrList *effective_attrs;
PangoLayout *layout;
gint width_chars;
ClutterGeometry cursor_pos;
ClutterActor *cursor;
gboolean show_cursor;
};
static void
clutter_entry_set_entry_padding (ClutterEntry *entry,
guint padding)
{
ClutterEntryPrivate *priv = entry->priv;
if (priv->entry_padding != padding)
{
priv->entry_padding = padding;
if (CLUTTER_ACTOR_IS_VISIBLE (CLUTTER_ACTOR (entry)))
clutter_actor_queue_redraw (CLUTTER_ACTOR (entry));
g_object_notify (G_OBJECT (entry), "entry-padding");
}
}
static void
clutter_entry_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
ClutterEntry *entry;
ClutterEntryPrivate *priv;
entry = CLUTTER_ENTRY (object);
priv = entry->priv;
switch (prop_id)
{
case PROP_FONT_NAME:
clutter_entry_set_font_name (entry, g_value_get_string (value));
break;
case PROP_TEXT:
clutter_entry_set_text (entry, g_value_get_string (value));
break;
case PROP_COLOR:
clutter_entry_set_color (entry, g_value_get_boxed (value));
break;
case PROP_ALIGNMENT:
clutter_entry_set_alignment (entry, g_value_get_enum (value));
break;
case PROP_POSITION:
clutter_entry_set_position (entry, g_value_get_int (value));
break;
case PROP_CURSOR:
clutter_entry_set_visible_cursor (entry, g_value_get_boolean (value));
break;
case PROP_TEXT_VISIBLE:
clutter_entry_set_visibility (entry, g_value_get_boolean (value));
break;
case PROP_MAX_LENGTH:
clutter_entry_set_max_length (entry, g_value_get_int (value));
break;
case PROP_ENTRY_PADDING:
clutter_entry_set_entry_padding (entry, g_value_get_uint (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
clutter_entry_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
ClutterEntry *entry;
ClutterEntryPrivate *priv;
ClutterColor color;
entry = CLUTTER_ENTRY(object);
priv = entry->priv;
switch (prop_id)
{
case PROP_FONT_NAME:
g_value_set_string (value, priv->font_name);
break;
case PROP_TEXT:
g_value_set_string (value, priv->text);
break;
case PROP_COLOR:
clutter_entry_get_color (entry, &color);
g_value_set_boxed (value, &color);
break;
case PROP_ALIGNMENT:
g_value_set_enum (value, priv->alignment);
break;
case PROP_POSITION:
g_value_set_int (value, priv->position);
break;
case PROP_CURSOR:
g_value_set_boolean (value, priv->show_cursor);
break;
case PROP_TEXT_VISIBLE:
g_value_set_boolean (value, priv->text_visible);
break;
case PROP_MAX_LENGTH:
g_value_set_int (value, priv->max_length);
break;
case PROP_ENTRY_PADDING:
g_value_set_uint (value, priv->entry_padding);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
clutter_entry_ensure_layout (ClutterEntry *entry, gint width)
{
ClutterEntryPrivate *priv;
priv = entry->priv;
if (!priv->layout)
{
priv->layout = pango_layout_new (_context);
if (priv->effective_attrs)
pango_layout_set_attributes (priv->layout, priv->effective_attrs);
pango_layout_set_alignment (priv->layout, priv->alignment);
pango_layout_set_ellipsize (priv->layout, priv->ellipsize);
pango_layout_set_single_paragraph_mode (priv->layout,
priv->single_line_mode);
pango_layout_set_font_description (priv->layout, priv->desc);
if (priv->text_visible)
pango_layout_set_text (priv->layout, priv->text, -1);
else
{
gint len = g_utf8_strlen (priv->text, -1);
gchar *invisible = g_strnfill (len, priv->priv_char);
pango_layout_set_markup (priv->layout, invisible, -1);
g_free (invisible);
}
if (priv->wrap)
pango_layout_set_wrap (priv->layout, priv->wrap_mode);
if (priv->wrap && width > 0)
pango_layout_set_width (priv->layout, width * PANGO_SCALE);
else
pango_layout_set_width (priv->layout, -1);
}
}
static void
clutter_entry_clear_layout (ClutterEntry *entry)
{
if (entry->priv->layout)
{
g_object_unref (entry->priv->layout);
entry->priv->layout = NULL;
}
}
static gint
offset_to_bytes (const gchar *text, gint pos)
{
gchar *c = NULL;
gint i, j, len;
if (pos < 1)
return pos;
c = g_utf8_next_char (text);
j = 1;
len = strlen (text);
for (i = 0; i < len; i++)
{
if (&text[i] == c)
{
if (j == pos)
break;
else
{
c = g_utf8_next_char (c);
j++;
}
}
}
return i;
}
static void
clutter_entry_ensure_cursor_position (ClutterEntry *entry)
{
ClutterEntryPrivate *priv;
gint index;
PangoRectangle rect;
priv = entry->priv;
if (priv->position == -1)
index = strlen (priv->text);
else
index = offset_to_bytes (priv->text, priv->position);
pango_layout_get_cursor_pos (priv->layout, index, &rect, NULL);
priv->cursor_pos.x = rect.x / PANGO_SCALE;
priv->cursor_pos.y = rect.y / PANGO_SCALE;
priv->cursor_pos.width = ENTRY_CURSOR_WIDTH;
priv->cursor_pos.height = rect.height / PANGO_SCALE;
g_signal_emit (entry, entry_signals[CURSOR_EVENT], 0, &priv->cursor_pos);
}
static void
clutter_entry_clear_cursor_position (ClutterEntry *entry)
{
entry->priv->cursor_pos.width = 0;
}
void
clutter_entry_paint_cursor (ClutterEntry *entry)
{
ClutterEntryPrivate *priv;
priv = entry->priv;
if (priv->show_cursor)
{
clutter_actor_set_size (CLUTTER_ACTOR (priv->cursor),
priv->cursor_pos.width,
priv->cursor_pos.height);
clutter_actor_set_position (priv->cursor,
priv->cursor_pos.x,
priv->cursor_pos.y);
clutter_actor_paint (priv->cursor);
}
}
static void
clutter_entry_paint (ClutterActor *self)
{
ClutterEntry *entry;
ClutterEntryPrivate *priv;
PangoRectangle logical;
gint actor_width;
gint text_width;
gint cursor_x;
entry = CLUTTER_ENTRY(self);
priv = entry->priv;
if (priv->desc == NULL || priv->text == NULL)
{
CLUTTER_NOTE (ACTOR, "layout: %p , desc: %p, text %p",
priv->layout,
priv->desc,
priv->text);
return;
}
clutter_actor_set_clip (self, 0, 0,
clutter_actor_get_width (self),
clutter_actor_get_height (self));
actor_width = clutter_actor_get_width (self) - (2 * priv->entry_padding);
clutter_entry_ensure_layout (entry, actor_width);
clutter_entry_ensure_cursor_position (entry);
pango_layout_get_extents (priv->layout, NULL, &logical);
text_width = logical.width / PANGO_SCALE;
if (actor_width < text_width)
{
/* We need to do some scrolling */
cursor_x = priv->cursor_pos.x;
/* If the cursor is at the begining or the end of the text, the placement
* is easy, however, if the cursor is in the middle somewhere, we need to
* make sure the text doesn't move until the cursor is either in the
* far left or far right
*/
if (priv->position == 0)
priv->text_x = 0;
else if (priv->position == -1)
{
priv->text_x = actor_width - text_width;
priv->cursor_pos.x += priv->text_x + priv->entry_padding;
}
else
{
if (priv->text_x < 0)
{
gint diff = -1 * priv->text_x;
if (cursor_x < diff)
priv->text_x += diff - cursor_x;
else if (cursor_x > (diff + actor_width))
priv->text_x -= cursor_x - (diff+actor_width);
}
priv->cursor_pos.x += priv->text_x + priv->entry_padding;
}
}
else
{
priv->text_x = 0;
priv->cursor_pos.x += priv->entry_padding;
}
priv->fgcol.alpha = clutter_actor_get_opacity (self);
pango_clutter_render_layout (priv->layout,
priv->text_x + priv->entry_padding,
0, &priv->fgcol, 0);
if (CLUTTER_ENTRY_GET_CLASS (entry)->paint_cursor)
CLUTTER_ENTRY_GET_CLASS (entry)->paint_cursor (entry);
}
static void
clutter_entry_request_coords (ClutterActor *self,
ClutterActorBox *box)
{
/* do we need to do anything ? */
clutter_entry_clear_layout (CLUTTER_ENTRY (self));
}
static void
clutter_entry_dispose (GObject *object)
{
ClutterEntry *self = CLUTTER_ENTRY(object);
ClutterEntryPrivate *priv;
priv = self->priv;
if (priv->layout)
{
g_object_unref (priv->layout);
priv->layout = NULL;
}
if (priv->context)
{
g_object_unref (priv->context);
priv->context = NULL;
}
G_OBJECT_CLASS (clutter_entry_parent_class)->dispose (object);
}
static void
clutter_entry_finalize (GObject *object)
{
ClutterEntryPrivate *priv = CLUTTER_ENTRY (object)->priv;
if (priv->desc)
pango_font_description_free (priv->desc);
g_free (priv->text);
g_free (priv->font_name);
G_OBJECT_CLASS (clutter_entry_parent_class)->finalize (object);
}
static void
clutter_entry_class_init (ClutterEntryClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
ClutterActorClass *actor_class = CLUTTER_ACTOR_CLASS (klass);
klass->paint_cursor = clutter_entry_paint_cursor;
actor_class->paint = clutter_entry_paint;
actor_class->request_coords = clutter_entry_request_coords;
gobject_class->finalize = clutter_entry_finalize;
gobject_class->dispose = clutter_entry_dispose;
gobject_class->set_property = clutter_entry_set_property;
gobject_class->get_property = clutter_entry_get_property;
/**
* ClutterEntry:font-name:
*
* The font to be used by the entry, expressed in a string that
* can be parsed by pango_font_description_from_string().
*
* Since: 0.4
*/
g_object_class_install_property
(gobject_class, PROP_FONT_NAME,
g_param_spec_string ("font-name",
"Font Name",
"Pango font description",
NULL,
G_PARAM_CONSTRUCT | CLUTTER_PARAM_READWRITE));
/**
* ClutterEntry:text:
*
* The text inside the entry.
*
* Since: 0.4
*/
g_object_class_install_property
(gobject_class, PROP_TEXT,
g_param_spec_string ("text",
"Text",
"Text to render",
NULL,
G_PARAM_CONSTRUCT | CLUTTER_PARAM_READWRITE));
/**
* ClutterEntry:color:
*
* The color of the text inside the entry.
*
* Since: 0.4
*/
g_object_class_install_property
(gobject_class, PROP_COLOR,
g_param_spec_boxed ("color",
"Font Colour",
"Font Colour",
CLUTTER_TYPE_COLOR,
CLUTTER_PARAM_READWRITE));
/**
* ClutterEntry:alignment:
*
* The preferred alignment for the string.
*
* Since: 0.4
*/
g_object_class_install_property
(gobject_class, PROP_ALIGNMENT,
g_param_spec_enum ("alignment",
"Alignment",
"The preferred alignment for the string,",
PANGO_TYPE_ALIGNMENT,
PANGO_ALIGN_LEFT,
CLUTTER_PARAM_READWRITE));
/**
* ClutterEntry:position:
*
* The current input cursor position. -1 is taken to be the end of the text
*
* Since: 0.4
*/
g_object_class_install_property
(gobject_class, PROP_POSITION,
g_param_spec_int ("position",
"Position",
"The cursor position",
-1, G_MAXINT,
-1,
CLUTTER_PARAM_READWRITE));
/**
* ClutterEntry:cursor-visible:
*
* Whether the input cursor is visible or not.
*
* Since: 0.4
*/
g_object_class_install_property
(gobject_class, PROP_CURSOR,
g_param_spec_boolean ( "cursor-visible",
"Cursor Visible",
"Whether the input cursor is visible",
TRUE,
CLUTTER_PARAM_READWRITE));
/**
* ClutterEntry:text-visible:
*
* Whether the text is visible in plain, or replaced by the
* character set by clutter_entry_set_invisible_char().
*
* Since: 0.4
*/
g_object_class_install_property
(gobject_class, PROP_TEXT_VISIBLE,
g_param_spec_boolean ("text-visible",
"Text Visible",
"Whether the text is visible in plain text",
TRUE,
CLUTTER_PARAM_READWRITE));
/**
* ClutterEntry:max-length:
*
* The maximum length of the entry text.
*
* Since: 0.4
*/
g_object_class_install_property
(gobject_class, PROP_MAX_LENGTH,
g_param_spec_int ("max-length",
"Max Length",
"The maximum length of the entry text",
0, G_MAXINT,
0,
CLUTTER_PARAM_READWRITE));
/**
* ClutterEntry:entry-padding:
*
* The padding space between the text and the entry right and left borders.
*
* Since: 0.4
*/
g_object_class_install_property
(gobject_class, PROP_ENTRY_PADDING,
g_param_spec_uint ("entry-padding",
"Entry Padding",
"The padding space between the text and the left and "
"right borders",
0, G_MAXUINT,
ENTRY_PADDING,
CLUTTER_PARAM_READWRITE));
/**
* ClutterEntry::text-changed:
* @entry: the actor which received the event
*
* The ::text-changed signal is emitted after the @entrys text changes
*/
entry_signals[TEXT_CHANGED] =
g_signal_new ("text-changed",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (ClutterEntryClass, text_changed),
NULL, NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE, 0);
/**
* ClutterEntry::cursor-event:
* @entry: the actor which received the event
* @geometry: a #ClutterGeometry
*
* The ::cursor-event signal is emitted each time the input cursors geometry
* changes, this could be a positional or size change. If you would like to
* implement your own input cursor, set the cursor-visible property to FALSE,
* and connect to this signal to position and size your own cursor.
*
* Since: 0.4
*/
entry_signals[CURSOR_EVENT] =
g_signal_new ("cursor-event",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (ClutterEntryClass, cursor_event),
NULL, NULL,
clutter_marshal_VOID__BOXED,
G_TYPE_NONE, 1,
CLUTTER_TYPE_GEOMETRY | G_SIGNAL_TYPE_STATIC_SCOPE);
/**
* ClutterEntry::activate:
* @entry: the actor which received the event
*
* The ::activate signal is emitted each time the netry is 'activated'
* by the user, normally by pressing the 'Enter' key. This signal will
* only be emitted when your are adding text to the entry via
* #clutter_entry_handle_key_event().
*
* Since: 0.4
*/
entry_signals[ACTIVATE] =
g_signal_new ("activate",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (ClutterEntryClass, activate),
NULL, NULL,
clutter_marshal_VOID__VOID,
G_TYPE_NONE, 0);
g_type_class_add_private (gobject_class, sizeof (ClutterEntryPrivate));
}
static void
clutter_entry_init (ClutterEntry *self)
{
ClutterEntryPrivate *priv;
self->priv = priv = CLUTTER_ENTRY_GET_PRIVATE (self);
if (G_UNLIKELY (_context == NULL))
{
_font_map = PANGO_CLUTTER_FONT_MAP (pango_clutter_font_map_new ());
/* pango_clutter_font_map_set_resolution (font_map, 96.0, 96.0); */
_context = pango_clutter_font_map_create_context (_font_map);
}
priv->alignment = PANGO_ALIGN_LEFT;
priv->wrap = FALSE;
priv->wrap_mode = PANGO_WRAP_WORD;
priv->ellipsize = PANGO_ELLIPSIZE_NONE;
priv->use_underline = FALSE;
priv->use_markup = FALSE;
priv->layout = NULL;
priv->text = NULL;
priv->attrs = NULL;
priv->position = -1;
priv->priv_char = '*';
priv->text_visible = TRUE;
priv->text_x = 0;
priv->max_length = 0;
priv->entry_padding = ENTRY_PADDING;
priv->fgcol.red = 0;
priv->fgcol.green = 0;
priv->fgcol.blue = 0;
priv->fgcol.alpha = 255;
priv->font_name = g_strdup (DEFAULT_FONT_NAME);
priv->desc = pango_font_description_from_string (priv->font_name);
priv->cursor = clutter_rectangle_new_with_color (&priv->fgcol);
clutter_actor_set_parent (priv->cursor, CLUTTER_ACTOR (self));
priv->show_cursor = TRUE;
}
/**
* clutter_entry_new_with_text:
* @font_name: the name (and size) of the font to be used
* @text: the text to be displayed
*
* Creates a new #ClutterEntry displaying @text using @font_name.
*
* Return value: the newly created #ClutterEntry
*
* Since: 0.4
*/
ClutterActor *
clutter_entry_new_with_text (const gchar *font_name,
const gchar *text)
{
ClutterActor *entry = clutter_entry_new ();
g_object_set (entry,
"font-name", font_name,
"text", text,
NULL);
return entry;
}
/**
* clutter_entry_new_full:
* @font_name: the name (and size) of the font to be used
* @text: the text to be displayed
* @color: #ClutterColor for text
*
* Creates a new #ClutterEntry displaying @text with color @color
* using @font_name.
*
* Return value: the newly created #ClutterEntry
*
* Since: 0.4
*/
ClutterActor *
clutter_entry_new_full (const gchar *font_name,
const gchar *text,
const ClutterColor *color)
{
ClutterActor *entry;
entry = clutter_entry_new_with_text (font_name, text);
clutter_entry_set_color (CLUTTER_ENTRY(entry), color);
return entry;
}
/**
* clutter_entry_new:
*
* Creates a new, empty #ClutterEntry.
*
* Returns: the newly created #ClutterEntry
*/
ClutterActor *
clutter_entry_new (void)
{
ClutterActor *entry = g_object_new (CLUTTER_TYPE_ENTRY,
NULL);
clutter_actor_set_size (entry, 50, 50);
return entry;
}
/**
* clutter_entry_get_text:
* @entry: a #ClutterEntry
*
* Retrieves the text displayed by @entry
*
* Return value: the text of the entry. The returned string is
* owned by #ClutterEntry and should not be modified or freed.
*
* Since: 0.4
*/
G_CONST_RETURN gchar *
clutter_entry_get_text (ClutterEntry *entry)
{
g_return_val_if_fail (CLUTTER_IS_ENTRY (entry), NULL);
return entry->priv->text;
}
/**
* clutter_entry_set_text:
* @entry: a #ClutterEntry
* @text: the text to be displayed
*
* Sets @text as the text to be displayed by @entry. The
* ClutterEntry::text-changed signal is emitted.
*
* Since: 0.4
*/
void
clutter_entry_set_text (ClutterEntry *entry,
const gchar *text)
{
ClutterEntryPrivate *priv;
g_return_if_fail (CLUTTER_IS_ENTRY (entry));
priv = entry->priv;
g_object_ref (entry);
if (priv->max_length > 0)
{
gint len = g_utf8_strlen (text, -1);
if (len < priv->max_length)
{
g_free (priv->text);
priv->text = g_strdup (text);
}
else
{
gchar new[priv->max_length + 1];
g_utf8_strncpy (new, text, priv->max_length);
g_free (priv->text);
priv->text = g_strdup (new);
}
}
else
{
g_free (priv->text);
priv->text = g_strdup (text);
}
clutter_entry_clear_layout (entry);
clutter_entry_clear_cursor_position (entry);
if (CLUTTER_ACTOR_IS_VISIBLE (CLUTTER_ACTOR(entry)))
clutter_actor_queue_redraw (CLUTTER_ACTOR(entry));
g_signal_emit (G_OBJECT (entry), entry_signals[TEXT_CHANGED], 0);
g_object_notify (G_OBJECT (entry), "text");
g_object_unref (entry);
}
/**
* clutter_entry_get_font_name:
* @entry: a #ClutterEntry
*
* Retrieves the font used by @entry.
*
* Return value: a string containing the font name, in a format
* understandable by pango_font_description_from_string(). The
* string is owned by #ClutterEntry and should not be modified
* or freed.
*
* Since: 0.4
*/
G_CONST_RETURN gchar *
clutter_entry_get_font_name (ClutterEntry *entry)
{
g_return_val_if_fail (CLUTTER_IS_ENTRY (entry), NULL);
return entry->priv->font_name;
}
/**
* clutter_entry_set_font_name:
* @entry: a #ClutterEntry
* @font_name: a font name and size, or %NULL for the default font
*
* Sets @font_name as the font used by @entry.
*
* @font_name must be a string containing the font name and its
* size, similarly to what you would feed to the
* pango_font_description_from_string() function.
*
* Since: 0.4
*/
void
clutter_entry_set_font_name (ClutterEntry *entry,
const gchar *font_name)
{
ClutterEntryPrivate *priv;
PangoFontDescription *desc;
g_return_if_fail (CLUTTER_IS_ENTRY (entry));
if (!font_name || font_name[0] == '\0')
font_name = DEFAULT_FONT_NAME;
priv = entry->priv;
if (strcmp (priv->font_name, font_name) == 0)
return;
desc = pango_font_description_from_string (font_name);
if (!desc)
{
g_warning ("Attempting to create a PangoFontDescription for "
"font name `%s', but failed.",
font_name);
return;
}
g_object_ref (entry);
g_free (priv->font_name);
priv->font_name = g_strdup (font_name);
if (priv->desc)
pango_font_description_free (priv->desc);
priv->desc = desc;
if (entry->priv->text && entry->priv->text[0] != '\0')
{
clutter_entry_clear_layout (entry);
if (CLUTTER_ACTOR_IS_VISIBLE (CLUTTER_ACTOR (entry)))
clutter_actor_queue_redraw (CLUTTER_ACTOR (entry));
}
g_object_notify (G_OBJECT (entry), "font-name");
g_object_unref (entry);
}
/**
* clutter_entry_set_color:
* @entry: a #ClutterEntry
* @color: a #ClutterColor
*
* Sets the color of @entry.
*
* Since: 0.4
*/
void
clutter_entry_set_color (ClutterEntry *entry,
const ClutterColor *color)
{
ClutterActor *actor;
ClutterEntryPrivate *priv;
g_return_if_fail (CLUTTER_IS_ENTRY (entry));
g_return_if_fail (color != NULL);
priv = entry->priv;
g_object_ref (entry);
priv->fgcol.red = color->red;
priv->fgcol.green = color->green;
priv->fgcol.blue = color->blue;
priv->fgcol.alpha = color->alpha;
actor = CLUTTER_ACTOR (entry);
clutter_actor_set_opacity (actor, priv->fgcol.alpha);
clutter_rectangle_set_color (CLUTTER_RECTANGLE (priv->cursor), &priv->fgcol);
if (CLUTTER_ACTOR_IS_VISIBLE (actor))
clutter_actor_queue_redraw (actor);
g_object_notify (G_OBJECT (entry), "color");
g_object_unref (entry);
}
/**
* clutter_entry_get_color:
* @entry: a #ClutterEntry
* @color: return location for a #ClutterColor
*
* Retrieves the color of @entry.
*
* Since: 0.4
*/
void
clutter_entry_get_color (ClutterEntry *entry,
ClutterColor *color)
{
ClutterEntryPrivate *priv;
g_return_if_fail (CLUTTER_IS_ENTRY (entry));
g_return_if_fail (color != NULL);
priv = entry->priv;
color->red = priv->fgcol.red;
color->green = priv->fgcol.green;
color->blue = priv->fgcol.blue;
color->alpha = priv->fgcol.alpha;
}
/**
* clutter_entry_get_layout:
* @entry: a #ClutterEntry
*
* Gets the #PangoLayout used to display the entry.
* The layout is useful to e.g. convert text positions to
* pixel positions.
* The returned layout is owned by the entry so need not be
* freed by the caller.
*
* Return value: the #PangoLayout for this entry
*
* Since: 0.4
**/
PangoLayout *
clutter_entry_get_layout (ClutterEntry *entry)
{
g_return_val_if_fail (CLUTTER_IS_ENTRY (entry), NULL);
clutter_entry_ensure_layout (entry, -1);
return entry->priv->layout;
}
/**
* clutter_entry_set_alignment:
* @entry: a #ClutterEntry
* @alignment: A #PangoAlignment
*
* Sets text alignment of the entry.
*
* Since: 0.4
*/
void
clutter_entry_set_alignment (ClutterEntry *entry,
PangoAlignment alignment)
{
ClutterEntryPrivate *priv;
g_return_if_fail (CLUTTER_IS_ENTRY (entry));
priv = entry->priv;
if (priv->alignment != alignment)
{
g_object_ref (entry);
priv->alignment = alignment;
clutter_entry_clear_layout (entry);
if (CLUTTER_ACTOR_IS_VISIBLE (CLUTTER_ACTOR (entry)))
clutter_actor_queue_redraw (CLUTTER_ACTOR (entry));
g_object_notify (G_OBJECT (entry), "alignment");
g_object_unref (entry);
}
}
/**
* clutter_entry_get_alignment:
* @entry: a #ClutterEntry
*
* Returns the entry's text alignment
*
* Return value: The entrys #PangoAlignment
*
* Since 0.4
*/
PangoAlignment
clutter_entry_get_alignment (ClutterEntry *entry)
{
g_return_val_if_fail (CLUTTER_IS_ENTRY (entry), FALSE);
return entry->priv->alignment;
}
/**
* clutter_entry_set_position:
* @entry: a #ClutterEntry
* @position: the position of the cursor.
*
* Sets the position of the cursor. The @position must be less than or
* equal to the number of characters in the entry. A value of -1 indicates
* that the position should be set after the last character in the entry.
* Note that this position is in characters, not in bytes.
*
* Since: 0.4
*/
void
clutter_entry_set_position (ClutterEntry *entry, gint position)
{
ClutterEntryPrivate *priv;
gint len;
g_return_if_fail (CLUTTER_IS_ENTRY (entry));
priv = entry->priv;
if (priv->text == NULL)
return;
len = g_utf8_strlen (priv->text, -1);
if (position < 0 || position >= len)
priv->position = -1;
else
priv->position = position;
clutter_entry_clear_cursor_position (entry);
if (CLUTTER_ACTOR_IS_VISIBLE (CLUTTER_ACTOR (entry)))
clutter_actor_queue_redraw (CLUTTER_ACTOR (entry));
}
/**
* clutter_entry_get_position:
* @entry: a #ClutterEntry
*
* Gets the position, in characters, of the cursor in @entry.
*
* Return value: the position of the cursor.
*
* Since: 0.4
*/
gint
clutter_entry_get_position (ClutterEntry *entry)
{
ClutterEntryPrivate *priv;
g_return_val_if_fail (CLUTTER_IS_ENTRY (entry), 0);
priv = entry->priv;
return priv->position;
}
/**
* clutter_entry_handle_key_event:
* @entry: a #ClutterEntry
* @kev: a #ClutterKeyEvent
*
* This function will handle a #ClutterKeyEvent, like those returned in a
* key-press/release-event, and will translate it for the @entry. This includes
* non-alphanumeric keys, such as the arrows keys, which will move the
* input cursor. You should use this function inside a handler for the
* ClutterStage::key-press-event or ClutterStage::key-release-event.
*
* Since: 0.4
*/
void
clutter_entry_handle_key_event (ClutterEntry *entry,
ClutterKeyEvent *kev)
{
ClutterEntryPrivate *priv;
gint pos = 0;
gint len = 0;
gint keyval = clutter_key_event_symbol (kev);
g_return_if_fail (CLUTTER_IS_ENTRY (entry));
priv = entry->priv;
pos = priv->position;
if (priv->text)
len = g_utf8_strlen (priv->text, -1);
switch (keyval)
{
case CLUTTER_Return:
case CLUTTER_KP_Enter:
case CLUTTER_ISO_Enter:
g_signal_emit (entry, entry_signals[ACTIVATE], 0);
break;
case CLUTTER_Escape:
case CLUTTER_Up:
case CLUTTER_KP_Up:
case CLUTTER_Down:
case CLUTTER_KP_Down:
case CLUTTER_Shift_L:
case CLUTTER_Shift_R:
break;
case CLUTTER_BackSpace:
if (pos != 0 && len != 0)
clutter_entry_delete_chars (entry, 1);
break;
case CLUTTER_Delete:
case CLUTTER_KP_Delete:
if (len && pos != -1)
clutter_entry_delete_text (entry, pos, pos+1);;
break;
case CLUTTER_Left:
case CLUTTER_KP_Left:
if (pos != 0 && len != 0)
{
if (pos == -1)
clutter_entry_set_position (entry, len - 1);
else
clutter_entry_set_position (entry, pos - 1);
}
break;
case CLUTTER_Right:
case CLUTTER_KP_Right:
if (pos != -1 && len != 0)
{
if (pos != len)
clutter_entry_set_position (entry, pos + 1);
}
break;
case CLUTTER_End:
case CLUTTER_KP_End:
clutter_entry_set_position (entry, -1);
break;
case CLUTTER_Begin:
case CLUTTER_Home:
case CLUTTER_KP_Home:
clutter_entry_set_position (entry, 0);
break;
default:
clutter_entry_insert_unichar (entry,
clutter_keysym_to_unicode (keyval));
break;
}
}
/**
* clutter_entry_insert_unichar:
* @entry: a #ClutterEntry
* @wc: a Unicode character
*
* Insert a character to the right of the current position of the cursor,
* and updates the position of the cursor.
*
* Since: 0.4
*/
void
clutter_entry_insert_unichar (ClutterEntry *entry,
gunichar wc)
{
ClutterEntryPrivate *priv;
GString *new = NULL;
glong pos;
g_return_if_fail (CLUTTER_IS_ENTRY (entry));
g_return_if_fail (g_unichar_validate (wc));
if (wc == 0)
return;
priv = entry->priv;
g_object_ref (entry);
new = g_string_new (priv->text);
pos = offset_to_bytes (priv->text, priv->position);
new = g_string_insert_unichar (new, pos, wc);
clutter_entry_set_text (entry, new->str);
if (priv->position >= 0)
clutter_entry_set_position (entry, priv->position + 1);
g_string_free (new, TRUE);
g_object_notify (G_OBJECT (entry), "text");
g_object_unref (entry);
}
/**
* clutter_entry_delete_chars:
* @entry: a #ClutterEntry
* @len: the number of characters to remove.
*
* Characters are removed from before the current postion of the cursor.
*
* Since: 0.4
*/
void
clutter_entry_delete_chars (ClutterEntry *entry,
guint num)
{
ClutterEntryPrivate *priv;
GString *new = NULL;
gint len;
gint pos;
gint num_pos;
g_return_if_fail (CLUTTER_IS_ENTRY (entry));
priv = entry->priv;
if (!priv->text)
return;
g_object_ref (entry);
len = g_utf8_strlen (priv->text, -1);
new = g_string_new (priv->text);
if (priv->position == -1)
{
num_pos = offset_to_bytes (priv->text, len - num);
new = g_string_erase (new, num_pos, -1);
}
else
{
pos = offset_to_bytes (priv->text, priv->position - num);
num_pos = offset_to_bytes (priv->text, priv->position);
new = g_string_erase (new, pos, num_pos-pos);
}
clutter_entry_set_text (entry, new->str);
if (priv->position > 0)
clutter_entry_set_position (entry, priv->position - num);
g_string_free (new, TRUE);
g_object_notify (G_OBJECT (entry), "text");
g_object_unref (entry);
}
/**
* clutter_entry_insert_text:
* @entry: a #ClutterEntry
* @text: the text to insert
* @position: the position at which to insert the text.
*
* Insert text at a specifc position.
*
* A value of 0 indicates that the text will be inserted before the first
* character in the entrys text, and a value of -1 indicates that the text
* will be inserted after the last character in the entrys text.
*
* Since: 0.4
*/
void
clutter_entry_insert_text (ClutterEntry *entry,
const gchar *text,
gssize position)
{
ClutterEntryPrivate *priv;
GString *new = NULL;
g_return_if_fail (CLUTTER_IS_ENTRY (entry));
priv = entry->priv;
new = g_string_new (priv->text);
new = g_string_insert (new, position, text);
clutter_entry_set_text (entry, new->str);
g_string_free (new, TRUE);
}
/**
* clutter_entry_delete_text:
* @entry: a #ClutterEntry
* @start_pos: the starting position.
* @end_pos: the end position.
*
* Deletes a sequence of characters. The characters that are deleted are
* those characters at positions from @start_pos up to, but not including,
* @end_pos. If @end_pos is negative, then the characters deleted will be
* those characters from @start_pos to the end of the text.
*
* Since: 0.4
*/
void
clutter_entry_delete_text (ClutterEntry *entry,
gssize start_pos,
gssize end_pos)
{
ClutterEntryPrivate *priv;
GString *new = NULL;
g_return_if_fail (CLUTTER_IS_ENTRY (entry));
priv = entry->priv;
if (!priv->text)
return;
new = g_string_new (priv->text);
new = g_string_erase (new, start_pos, end_pos - start_pos);
clutter_entry_set_text (entry, new->str);
g_string_free (new, TRUE);
}
/**
* clutter_entry_set_visible_cursor:
* @entry: a #ClutterEntry
* @visible: whether the input cursor should be visible
*
* Sets the visibility of the input cursor.
*
* Since: 0.4
*/
void
clutter_entry_set_visible_cursor (ClutterEntry *entry,
gboolean visible)
{
ClutterEntryPrivate *priv;
g_return_if_fail (CLUTTER_IS_ENTRY (entry));
priv = entry->priv;
if (priv->show_cursor != visible)
{
priv->show_cursor = visible;
g_object_notify (G_OBJECT (entry), "cursor-visible");
if (CLUTTER_ACTOR_IS_VISIBLE (CLUTTER_ACTOR (entry)))
clutter_actor_queue_redraw (CLUTTER_ACTOR (entry));
}
}
/**
* clutter_entry_get_visible_cursor:
* @entry: a #ClutterEntry
*
* Returns the input cursors visiblity
*
* Return value: whether the input cursor is visible
*
* Since: 0.4
*/
gboolean
clutter_entry_get_visible_cursor (ClutterEntry *entry)
{
g_return_val_if_fail (CLUTTER_IS_ENTRY (entry), FALSE);
return entry->priv->show_cursor;
}
/**
* clutter_entry_set_visibility:
* @entry: a #ClutterEntry
* @visible: TRUE if the contents of the entry are displayed as plaintext.
*
* Sets whether the contents of the entry are visible or not. When visibility
* is set to FALSE, characters are displayed as the invisible char, and will
* also appear that way when the text in the entry widget is copied elsewhere.
*
* The default invisible char is the asterisk '*', but it can be changed with
* #clutter_entry_set_invisible_char().
*
* Since: 0.4
*/
void
clutter_entry_set_visibility (ClutterEntry *entry, gboolean visible)
{
ClutterEntryPrivate *priv;
g_return_if_fail (CLUTTER_IS_ENTRY (entry));
priv = entry->priv;
priv->text_visible = visible;
clutter_entry_clear_layout (entry);
clutter_entry_clear_cursor_position (entry);
if (CLUTTER_ACTOR_IS_VISIBLE (CLUTTER_ACTOR (entry)))
clutter_actor_queue_redraw (CLUTTER_ACTOR (entry));
}
/**
* clutter_entry_get_visibility:
* @entry: a #ClutterEntry
*
* Returns the entry text visiblity
*
* Return value: TRUE if the contents of the entry are displayed as plaintext.
*
* Since: 0.4
*/
gboolean
clutter_entry_get_visibility (ClutterEntry *entry)
{
g_return_val_if_fail (CLUTTER_IS_ENTRY (entry), TRUE);
return entry->priv->text_visible;
}
/**
* clutter_entry_set_invisible_char:
* @entry: a #ClutterEntry
* @wc: a Unicode character
*
* Sets the character to use in place of the actual text when
* #clutter_entry_set_visibility() has been called to set text visibility
* to FALSE. i.e. this is the character used in "password mode" to show the
* user how many characters have been typed. The default invisible char is an
* asterisk ('*'). If you set the invisible char to 0, then the user will get
* no feedback at all; there will be no text on the screen as they type.
*
* Since: 0.4
*/
void
clutter_entry_set_invisible_char (ClutterEntry *entry, gunichar wc)
{
ClutterEntryPrivate *priv;
g_return_if_fail (CLUTTER_IS_ENTRY (entry));
priv = entry->priv;
priv->priv_char = wc;
if (!priv->text_visible)
return;
clutter_entry_clear_layout (entry);
clutter_entry_clear_cursor_position (entry);
if (CLUTTER_ACTOR_IS_VISIBLE (CLUTTER_ACTOR(entry)))
clutter_actor_queue_redraw (CLUTTER_ACTOR(entry));
}
/**
* clutter_entry_get_invisible_char:
* @entry: a #ClutterEntry
*
* Returns the character to use in place of the actual text when text-visibility
* is set to FALSE
*
* Return value: a Unicode character
*
**/
gunichar
clutter_entry_get_invisible_char (ClutterEntry *entry)
{
ClutterEntryPrivate *priv;
g_return_val_if_fail (CLUTTER_IS_ENTRY (entry), TRUE);
priv = entry->priv;
return priv->priv_char;
}
/**
* clutter_entry_set_max_length:
* @entry: a #ClutterEntry
* @max: the maximum number of characters allowed in the entry, or -1
* to disable
*
* Sets the maximum allowed length of the contents of the actor. If the
* current contents are longer than the given length, then they will be
* truncated to fit.
*
* Since: 0.4
*/
void
clutter_entry_set_max_length (ClutterEntry *entry,
gint max)
{
ClutterEntryPrivate *priv;
gchar *new = NULL;
g_return_if_fail (CLUTTER_IS_ENTRY (entry));
priv = entry->priv;
if (priv->max_length != max)
{
g_object_ref (entry);
if (max < 0)
max = g_utf8_strlen (priv->text, -1);
priv->max_length = max;
new = g_strdup (priv->text);
clutter_entry_set_text (entry, new);
g_free (new);
g_object_notify (G_OBJECT (entry), "max-length");
g_object_unref (entry);
}
}
/**
* clutter_entry_get_max_length:
* @entry: a #ClutterEntry
*
* Gets the maximum length of text that can be set into @entry.
* See clutter_entry_set_max_length().
*
* Return value: the maximum number of characters.
*
* Since: 0.4
*/
gint
clutter_entry_get_max_length (ClutterEntry *entry)
{
g_return_val_if_fail (CLUTTER_IS_ENTRY (entry), -1);
return entry->priv->max_length;
}
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