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/* gtkcellrenderertext.c
* Copyright (C) 2000 Red Hat, Inc., Jonathan Blandford <jrb@redhat.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library 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.
*/
#include <stdlib.h>
#include "gtkcellrenderertext.h"
#include "gtkintl.h"
static void gtk_cell_renderer_text_init (GtkCellRendererText *celltext);
static void gtk_cell_renderer_text_class_init (GtkCellRendererTextClass *class);
static void gtk_cell_renderer_text_get_property (GObject *object,
guint param_id,
GValue *value,
GParamSpec *pspec,
const gchar *trailer);
static void gtk_cell_renderer_text_set_property (GObject *object,
guint param_id,
const GValue *value,
GParamSpec *pspec,
const gchar *trailer);
static void gtk_cell_renderer_text_get_size (GtkCellRenderer *cell,
GtkWidget *widget,
gint *width,
gint *height);
static void gtk_cell_renderer_text_render (GtkCellRenderer *cell,
GdkWindow *window,
GtkWidget *widget,
GdkRectangle *background_area,
GdkRectangle *cell_area,
GdkRectangle *expose_area,
guint flags);
enum {
PROP_ZERO,
PROP_TEXT,
PROP_FONT,
PROP_BACKGROUND,
PROP_BACKGROUND_GDK,
PROP_FOREGROUND,
PROP_FOREGROUND_GDK,
PROP_STRIKETHROUGH,
PROP_UNDERLINE,
PROP_EDITABLE,
PROP_ITALIC,
PROP_BOLD
};
GtkType
gtk_cell_renderer_text_get_type (void)
{
static GtkType cell_text_type = 0;
if (!cell_text_type)
{
static const GTypeInfo cell_text_info =
{
sizeof (GtkCellRendererTextClass),
NULL, /* base_init */
NULL, /* base_finalize */
(GClassInitFunc) gtk_cell_renderer_text_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GtkCellRendererText),
0, /* n_preallocs */
(GInstanceInitFunc) gtk_cell_renderer_text_init,
};
cell_text_type = g_type_register_static (GTK_TYPE_CELL_RENDERER, "GtkCellRendererText", &cell_text_info, 0);
}
return cell_text_type;
}
static void
gtk_cell_renderer_text_init (GtkCellRendererText *celltext)
{
celltext->attr_list = pango_attr_list_new ();
GTK_CELL_RENDERER (celltext)->xalign = 0.0;
GTK_CELL_RENDERER (celltext)->yalign = 0.5;
GTK_CELL_RENDERER (celltext)->xpad = 2;
GTK_CELL_RENDERER (celltext)->ypad = 2;
celltext->underline = FALSE;
}
static void
gtk_cell_renderer_text_class_init (GtkCellRendererTextClass *class)
{
GObjectClass *object_class = G_OBJECT_CLASS (class);
GtkCellRendererClass *cell_class = GTK_CELL_RENDERER_CLASS (class);
object_class->get_property = gtk_cell_renderer_text_get_property;
object_class->set_property = gtk_cell_renderer_text_set_property;
cell_class->get_size = gtk_cell_renderer_text_get_size;
cell_class->render = gtk_cell_renderer_text_render;
g_object_class_install_property (object_class,
PROP_TEXT,
g_param_spec_string ("text",
_("Text String"),
_("The text of the renderer."),
"",
G_PARAM_READABLE |
G_PARAM_WRITABLE));
g_object_class_install_property (object_class,
PROP_FONT,
g_param_spec_string ("font",
_("Font String"),
_("The string of the font."),
"",
G_PARAM_WRITABLE));
g_object_class_install_property (object_class,
PROP_BACKGROUND,
g_param_spec_string ("background",
_("Background Color string"),
_("The color for the background of the text."),
"white",
G_PARAM_WRITABLE));
g_object_class_install_property (object_class,
PROP_FOREGROUND,
g_param_spec_string ("foreground",
_("Foreground Color string"),
_("The color for the background of the text."),
"black",
G_PARAM_WRITABLE));
g_object_class_install_property (object_class,
PROP_STRIKETHROUGH,
g_param_spec_boolean ("strikethrough",
_("Strikethrough"),
_("Draw a line through the text."),
FALSE,
G_PARAM_READABLE |
G_PARAM_WRITABLE));
g_object_class_install_property (object_class,
PROP_UNDERLINE,
g_param_spec_boolean ("underline",
_("Underline"),
_("Underline the text."),
FALSE,
G_PARAM_READABLE |
G_PARAM_WRITABLE));
g_object_class_install_property (object_class,
PROP_EDITABLE,
g_param_spec_boolean ("editable",
_("Editable"),
_("Make the text editable."),
FALSE,
G_PARAM_READABLE |
G_PARAM_WRITABLE));
g_object_class_install_property (object_class,
PROP_ITALIC,
g_param_spec_boolean ("italic",
_("Italic"),
_("Make the text italic."),
FALSE,
G_PARAM_WRITABLE));
g_object_class_install_property (object_class,
PROP_BOLD,
g_param_spec_boolean ("bold",
_("Bold"),
_("Make the text bold."),
FALSE,
G_PARAM_WRITABLE));
}
static void
gtk_cell_renderer_text_get_property (GObject *object,
guint param_id,
GValue *value,
GParamSpec *pspec,
const gchar *trailer)
{
GtkCellRendererText *celltext = GTK_CELL_RENDERER_TEXT (object);
PangoAttrIterator *attr_iter;
PangoAttribute *attr;
switch (param_id)
{
case PROP_TEXT:
g_value_set_string (value, celltext->text);
break;
case PROP_STRIKETHROUGH:
attr_iter = pango_attr_list_get_iterator (celltext->attr_list);
attr = pango_attr_iterator_get (attr_iter,
PANGO_ATTR_STRIKETHROUGH);
g_value_set_boolean (value, ((PangoAttrInt*) attr)->value);
break;
case PROP_UNDERLINE:
g_value_set_boolean (value, celltext->underline);
break;
case PROP_EDITABLE:
g_value_set_boolean (value, celltext->editable);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
break;
}
}
static void
gtk_cell_renderer_text_set_property (GObject *object,
guint param_id,
const GValue *value,
GParamSpec *pspec,
const gchar *trailer)
{
GtkCellRendererText *celltext = GTK_CELL_RENDERER_TEXT (object);
GdkColor color;
PangoFontDescription *font_desc;
gchar *string;
PangoAttribute *attribute;
gchar *font;
switch (param_id)
{
case PROP_TEXT:
g_free (celltext->text);
celltext->text = g_value_dup_string (value);
break;
case PROP_FONT:
font = g_value_get_string (value);
if (font)
{
font_desc = pango_font_description_from_string (font);
attribute = pango_attr_font_desc_new (font_desc);
attribute->start_index = 0;
attribute->end_index = G_MAXINT;
pango_font_description_free (font_desc);
pango_attr_list_change (celltext->attr_list,
attribute);
}
break;
case PROP_BACKGROUND:
string = g_value_get_string (value);
if (string && gdk_color_parse (string, &color))
{
attribute = pango_attr_background_new (color.red,
color.green,
color.blue);
attribute->start_index = 0;
attribute->end_index = G_MAXINT;
pango_attr_list_change (celltext->attr_list,
attribute);
}
break;
case PROP_BACKGROUND_GDK:
break;
case PROP_FOREGROUND:
string = g_value_get_string (value);
if (string && gdk_color_parse (string, &color))
{
attribute = pango_attr_foreground_new (color.red,
color.green,
color.blue);
attribute->start_index = 0;
attribute->end_index = G_MAXINT;
pango_attr_list_change (celltext->attr_list,
attribute);
}
break;
case PROP_FOREGROUND_GDK:
break;
case PROP_STRIKETHROUGH:
attribute = pango_attr_strikethrough_new (g_value_get_boolean (value));
attribute->start_index = 0;
attribute->end_index = G_MAXINT;
pango_attr_list_change (celltext->attr_list,
attribute);
break;
case PROP_UNDERLINE:
celltext->underline = g_value_get_boolean (value);
attribute = pango_attr_underline_new (celltext->underline ?
PANGO_UNDERLINE_SINGLE :
PANGO_UNDERLINE_NONE);
attribute->start_index = 0;
attribute->end_index = G_MAXINT;
pango_attr_list_change (celltext->attr_list,
attribute);
break;
case PROP_EDITABLE:
break;
case PROP_ITALIC:
attribute = pango_attr_style_new (g_value_get_boolean (value) ?
PANGO_STYLE_ITALIC :
PANGO_STYLE_NORMAL);
attribute->start_index = 0;
attribute->end_index = G_MAXINT;
pango_attr_list_change (celltext->attr_list,
attribute);
break;
case PROP_BOLD:
attribute = pango_attr_weight_new (g_value_get_boolean (value) ?
PANGO_WEIGHT_BOLD :
PANGO_WEIGHT_NORMAL);
attribute->start_index = 0;
attribute->end_index = G_MAXINT;
pango_attr_list_change (celltext->attr_list,
attribute);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
break;
}
}
/**
* gtk_cell_renderer_text_new:
*
* Creates a new #GtkCellRendererText. Adjust how text is drawn using
* object properties. Object properties can be
* set globally (with g_object_set()). Also, with #GtkTreeViewColumn,
* you can bind a property to a value in a #GtkTreeModel. For example,
* you can bind the "text" property on the cell renderer to a string
* value in the model, thus rendering a different string in each row
* of the #GtkTreeView
*
* Return value: the new cell renderer
**/
GtkCellRenderer *
gtk_cell_renderer_text_new (void)
{
return GTK_CELL_RENDERER (gtk_type_new (gtk_cell_renderer_text_get_type ()));
}
static void
gtk_cell_renderer_text_get_size (GtkCellRenderer *cell,
GtkWidget *widget,
gint *width,
gint *height)
{
GtkCellRendererText *celltext = (GtkCellRendererText *)cell;
PangoRectangle rect;
PangoLayout *layout;
PangoAttribute *attr;
PangoUnderline underline;
layout = gtk_widget_create_pango_layout (widget, celltext->text);
underline = celltext->underline ?
PANGO_UNDERLINE_DOUBLE :
PANGO_UNDERLINE_NONE;
attr = pango_attr_underline_new (underline);
attr->start_index = 0;
attr->end_index = G_MAXINT;
pango_attr_list_change (celltext->attr_list, attr);
pango_layout_set_attributes (layout, celltext->attr_list);
pango_layout_set_width (layout, -1);
pango_layout_get_pixel_extents (layout, NULL, &rect);
if (width)
*width = GTK_CELL_RENDERER (celltext)->xpad * 2 + rect.width;
if (height)
*height = GTK_CELL_RENDERER (celltext)->ypad * 2 + rect.height;
g_object_unref (G_OBJECT (layout));
}
static void
gtk_cell_renderer_text_render (GtkCellRenderer *cell,
GdkWindow *window,
GtkWidget *widget,
GdkRectangle *background_area,
GdkRectangle *cell_area,
GdkRectangle *expose_area,
guint flags)
{
GtkCellRendererText *celltext = (GtkCellRendererText *) cell;
PangoRectangle rect;
PangoLayout *layout;
PangoAttribute *attr;
PangoUnderline underline;
GtkStateType state;
gint real_xoffset;
gint real_yoffset;
layout = gtk_widget_create_pango_layout (widget, celltext->text);
if (celltext->underline)
underline = PANGO_UNDERLINE_SINGLE;
else
underline = PANGO_UNDERLINE_NONE;
attr = pango_attr_underline_new (underline);
attr->start_index = 0;
attr->end_index = G_MAXINT;
pango_attr_list_change (celltext->attr_list, attr);
pango_layout_set_attributes (layout, celltext->attr_list);
pango_layout_set_width (layout, -1);
pango_layout_get_pixel_extents (layout, NULL, &rect);
if ((flags & GTK_CELL_RENDERER_PRELIT) == GTK_CELL_RENDERER_PRELIT)
underline = (celltext->underline) ? PANGO_UNDERLINE_DOUBLE:PANGO_UNDERLINE_SINGLE;
else
underline = (celltext->underline) ? PANGO_UNDERLINE_SINGLE:PANGO_UNDERLINE_NONE;
attr = pango_attr_underline_new (underline);
attr->start_index = 0;
attr->end_index = G_MAXINT;
pango_attr_list_change (celltext->attr_list, attr);
pango_layout_set_attributes (layout, celltext->attr_list);
real_xoffset = cell->xalign * (cell_area->width - rect.width - (2 * cell->xpad));
real_xoffset = MAX (real_xoffset, 0) + cell->xpad;
real_yoffset = cell->yalign * (cell_area->height - rect.height - (2 * cell->ypad));
real_yoffset = MAX (real_yoffset, 0) + cell->ypad;
if ((flags & GTK_CELL_RENDERER_SELECTED) == GTK_CELL_RENDERER_SELECTED)
state = GTK_STATE_SELECTED;
else
state = GTK_STATE_NORMAL;
gtk_paint_layout (widget->style,
window,
state,
cell_area,
widget,
"cellrenderertext",
cell_area->x + real_xoffset,
cell_area->y + real_yoffset,
layout);
g_object_unref (G_OBJECT (layout));
}
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