forked from AuroraMiddleware/gtk
3ff4a2c081
2000-10-04 <jrb@redhat.com>
* gtk/gtk{tree,cell}?*.[ch]: Checked in initial draft of the new
tree widget.
450 lines
13 KiB
C
450 lines
13 KiB
C
/* gtkcellrenderertext.c
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* Copyright (C) 2000 Red Hat, Inc., Jonathan Blandford <jrb@redhat.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include <stdlib.h>
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#include "gtkcellrenderertext.h"
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#ifndef _
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#define _(x) x
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#endif
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static void gtk_cell_renderer_text_init (GtkCellRendererText *celltext);
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static void gtk_cell_renderer_text_class_init (GtkCellRendererTextClass *class);
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static void gtk_cell_renderer_text_get_param (GObject *object,
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guint param_id,
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GValue *value,
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GParamSpec *pspec,
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const gchar *trailer);
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static void gtk_cell_renderer_text_set_param (GObject *object,
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guint param_id,
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GValue *value,
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GParamSpec *pspec,
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const gchar *trailer);
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static void gtk_cell_renderer_text_get_size (GtkCellRenderer *cell,
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GtkWidget *widget,
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gint *width,
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gint *height);
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static void gtk_cell_renderer_text_render (GtkCellRenderer *cell,
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GdkWindow *window,
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GtkWidget *widget,
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GdkRectangle *background_area,
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GdkRectangle *cell_area,
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GdkRectangle *expose_area,
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guint flags);
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enum {
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PROP_ZERO,
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PROP_TEXT,
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PROP_FONT,
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PROP_BACKGROUND,
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PROP_BACKGROUND_GDK,
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PROP_FOREGROUND,
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PROP_FOREGROUND_GDK,
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PROP_STRIKETHROUGH,
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PROP_UNDERLINE,
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PROP_EDITABLE,
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PROP_ITALIC,
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PROP_BOLD
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};
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GtkType
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gtk_cell_renderer_text_get_type (void)
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{
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static GtkType cell_text_type = 0;
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if (!cell_text_type)
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{
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static const GTypeInfo cell_text_info =
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{
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sizeof (GtkCellRendererTextClass),
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NULL, /* base_init */
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NULL, /* base_finalize */
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(GClassInitFunc) gtk_cell_renderer_text_class_init,
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NULL, /* class_finalize */
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NULL, /* class_data */
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sizeof (GtkCellRendererText),
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0, /* n_preallocs */
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(GInstanceInitFunc) gtk_cell_renderer_text_init,
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};
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cell_text_type = g_type_register_static (GTK_TYPE_CELL_RENDERER, "GtkCellRendererText", &cell_text_info);
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}
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return cell_text_type;
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}
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static void
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gtk_cell_renderer_text_init (GtkCellRendererText *celltext)
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{
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celltext->attr_list = pango_attr_list_new ();
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GTK_CELL_RENDERER (celltext)->xalign = 0.0;
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GTK_CELL_RENDERER (celltext)->yalign = 0.5;
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GTK_CELL_RENDERER (celltext)->xpad = 2;
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GTK_CELL_RENDERER (celltext)->ypad = 2;
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celltext->underline = FALSE;
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}
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static void
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gtk_cell_renderer_text_class_init (GtkCellRendererTextClass *class)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (class);
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GtkCellRendererClass *cell_class = GTK_CELL_RENDERER_CLASS (class);
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object_class->get_param = gtk_cell_renderer_text_get_param;
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object_class->set_param = gtk_cell_renderer_text_set_param;
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cell_class->get_size = gtk_cell_renderer_text_get_size;
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cell_class->render = gtk_cell_renderer_text_render;
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g_object_class_install_param (object_class,
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PROP_TEXT,
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g_param_spec_string ("text",
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_("Text String"),
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_("The text of the renderer."),
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"",
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G_PARAM_READABLE |
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G_PARAM_WRITABLE));
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g_object_class_install_param (object_class,
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PROP_FONT,
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g_param_spec_string ("font",
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_("Font String"),
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_("The string of the font."),
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"",
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G_PARAM_WRITABLE));
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g_object_class_install_param (object_class,
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PROP_BACKGROUND,
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g_param_spec_string ("background",
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_("Background Color string"),
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_("The color for the background of the text."),
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"white",
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G_PARAM_WRITABLE));
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g_object_class_install_param (object_class,
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PROP_FOREGROUND,
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g_param_spec_string ("foreground",
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_("Foreground Color string"),
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_("The color for the background of the text."),
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"black",
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G_PARAM_WRITABLE));
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g_object_class_install_param (object_class,
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PROP_STRIKETHROUGH,
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g_param_spec_boolean ("strikethrough",
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_("Strikethrough"),
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_("Draw a line through the text."),
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FALSE,
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G_PARAM_READABLE |
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G_PARAM_WRITABLE));
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g_object_class_install_param (object_class,
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PROP_UNDERLINE,
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g_param_spec_boolean ("underline",
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_("Underline"),
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_("Underline the text."),
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FALSE,
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G_PARAM_READABLE |
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G_PARAM_WRITABLE));
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g_object_class_install_param (object_class,
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PROP_EDITABLE,
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g_param_spec_boolean ("editable",
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_("Editable"),
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_("Make the text editable."),
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FALSE,
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G_PARAM_READABLE |
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G_PARAM_WRITABLE));
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g_object_class_install_param (object_class,
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PROP_ITALIC,
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g_param_spec_boolean ("italic",
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_("Italic"),
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_("Make the text italic."),
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FALSE,
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G_PARAM_WRITABLE));
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g_object_class_install_param (object_class,
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PROP_BOLD,
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g_param_spec_boolean ("bold",
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_("Bold"),
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_("Make the text bold."),
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FALSE,
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G_PARAM_WRITABLE));
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}
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static void
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gtk_cell_renderer_text_get_param (GObject *object,
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guint param_id,
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GValue *value,
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GParamSpec *pspec,
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const gchar *trailer)
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{
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GtkCellRendererText *celltext = GTK_CELL_RENDERER_TEXT (object);
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PangoAttrIterator *attr_iter;
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PangoAttribute *attr;
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switch (param_id)
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{
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case PROP_TEXT:
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g_value_init (value, G_TYPE_STRING);
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g_value_set_string (value, celltext->text);
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break;
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case PROP_STRIKETHROUGH:
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g_value_init (value, G_TYPE_BOOLEAN);
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attr_iter = pango_attr_list_get_iterator (celltext->attr_list);
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attr = pango_attr_iterator_get (attr_iter,
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PANGO_ATTR_STRIKETHROUGH);
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g_value_set_boolean (value, ((PangoAttrInt*) attr)->value);
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break;
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case PROP_UNDERLINE:
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g_value_init (value, G_TYPE_BOOLEAN);
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g_value_set_boolean (value, celltext->underline);
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break;
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case PROP_EDITABLE:
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g_value_init (value, G_TYPE_BOOLEAN);
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g_value_set_boolean (value, celltext->editable);
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break;
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default:
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break;
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}
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}
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static void
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gtk_cell_renderer_text_set_param (GObject *object,
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guint param_id,
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GValue *value,
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GParamSpec *pspec,
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const gchar *trailer)
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{
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GtkCellRendererText *celltext = GTK_CELL_RENDERER_TEXT (object);
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GdkColor color;
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PangoFontDescription *font_desc;
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gchar *string;
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PangoAttribute *attribute;
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gchar *font;
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switch (param_id)
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{
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case PROP_TEXT:
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g_free (celltext->text);
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celltext->text = g_value_dup_string (value);
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break;
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case PROP_FONT:
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font = g_value_get_string (value);
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if (font)
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{
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font_desc = pango_font_description_from_string (font);
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attribute = pango_attr_font_desc_new (font_desc);
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attribute->start_index = 0;
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attribute->end_index = G_MAXINT;
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pango_font_description_free (font_desc);
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pango_attr_list_change (celltext->attr_list,
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attribute);
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}
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break;
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case PROP_BACKGROUND:
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string = g_value_get_string (value);
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if (string && gdk_color_parse (string, &color))
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{
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attribute = pango_attr_background_new (color.red,
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color.green,
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color.blue);
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attribute->start_index = 0;
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attribute->end_index = G_MAXINT;
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pango_attr_list_change (celltext->attr_list,
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attribute);
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}
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break;
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case PROP_BACKGROUND_GDK:
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break;
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case PROP_FOREGROUND:
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string = g_value_get_string (value);
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if (string && gdk_color_parse (string, &color))
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{
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attribute = pango_attr_foreground_new (color.red,
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color.green,
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color.blue);
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attribute->start_index = 0;
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attribute->end_index = G_MAXINT;
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pango_attr_list_change (celltext->attr_list,
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attribute);
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}
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break;
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case PROP_FOREGROUND_GDK:
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break;
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case PROP_STRIKETHROUGH:
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attribute = pango_attr_strikethrough_new (g_value_get_boolean (value));
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attribute->start_index = 0;
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attribute->end_index = G_MAXINT;
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pango_attr_list_change (celltext->attr_list,
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attribute);
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break;
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case PROP_UNDERLINE:
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celltext->underline = g_value_get_boolean (value);
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attribute = pango_attr_underline_new (celltext->underline ?
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PANGO_UNDERLINE_SINGLE :
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PANGO_UNDERLINE_NONE);
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attribute->start_index = 0;
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attribute->end_index = G_MAXINT;
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pango_attr_list_change (celltext->attr_list,
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attribute);
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break;
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case PROP_EDITABLE:
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break;
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case PROP_ITALIC:
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attribute = pango_attr_style_new (g_value_get_boolean (value) ?
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PANGO_STYLE_ITALIC :
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PANGO_STYLE_NORMAL);
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attribute->start_index = 0;
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attribute->end_index = G_MAXINT;
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pango_attr_list_change (celltext->attr_list,
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attribute);
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break;
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case PROP_BOLD:
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attribute = pango_attr_weight_new (g_value_get_boolean (value) ?
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PANGO_WEIGHT_BOLD :
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PANGO_WEIGHT_NORMAL);
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attribute->start_index = 0;
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attribute->end_index = G_MAXINT;
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pango_attr_list_change (celltext->attr_list,
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attribute);
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break;
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default:
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break;
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}
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}
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GtkCellRenderer *
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gtk_cell_renderer_text_new (void)
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{
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return GTK_CELL_RENDERER (gtk_type_new (gtk_cell_renderer_text_get_type ()));
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}
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static void
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gtk_cell_renderer_text_get_size (GtkCellRenderer *cell,
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GtkWidget *widget,
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gint *width,
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gint *height)
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{
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GtkCellRendererText *celltext = (GtkCellRendererText *)cell;
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PangoRectangle rect;
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PangoLayout *layout;
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PangoAttribute *attr;
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PangoUnderline underline;
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layout = gtk_widget_create_pango_layout (widget, celltext->text);
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underline = celltext->underline ?
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PANGO_UNDERLINE_DOUBLE :
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PANGO_UNDERLINE_NONE;
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attr = pango_attr_underline_new (underline);
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attr->start_index = 0;
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attr->end_index = G_MAXINT;
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pango_attr_list_change (celltext->attr_list, attr);
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pango_layout_set_attributes (layout, celltext->attr_list);
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pango_layout_set_width (layout, -1);
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pango_layout_get_pixel_extents (layout, NULL, &rect);
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if (width)
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*width = GTK_CELL_RENDERER (celltext)->xpad * 2 + rect.width;
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if (height)
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*height = GTK_CELL_RENDERER (celltext)->ypad * 2 + rect.height;
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g_object_unref (G_OBJECT (layout));
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}
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static void
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gtk_cell_renderer_text_render (GtkCellRenderer *cell,
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GdkWindow *window,
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GtkWidget *widget,
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GdkRectangle *background_area,
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GdkRectangle *cell_area,
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GdkRectangle *expose_area,
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guint flags)
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{
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GtkCellRendererText *celltext = (GtkCellRendererText *) cell;
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PangoRectangle rect;
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PangoLayout *layout;
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PangoAttribute *attr;
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PangoUnderline underline;
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gint real_xoffset;
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gint real_yoffset;
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GdkGC *font_gc = NULL;
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if ((flags & GTK_CELL_RENDERER_SELECTED) == GTK_CELL_RENDERER_SELECTED)
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font_gc = widget->style->fg_gc [GTK_STATE_SELECTED];
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else
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font_gc = widget->style->fg_gc [GTK_STATE_NORMAL];
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layout = gtk_widget_create_pango_layout (widget, celltext->text);
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if (celltext->underline)
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underline = PANGO_UNDERLINE_SINGLE;
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else
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underline = PANGO_UNDERLINE_NONE;
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attr = pango_attr_underline_new (underline);
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attr->start_index = 0;
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attr->end_index = G_MAXINT;
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pango_attr_list_change (celltext->attr_list, attr);
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pango_layout_set_attributes (layout, celltext->attr_list);
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pango_layout_set_width (layout, -1);
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pango_layout_get_pixel_extents (layout, NULL, &rect);
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if ((flags & GTK_CELL_RENDERER_PRELIT) == GTK_CELL_RENDERER_PRELIT)
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underline = (celltext->underline) ? PANGO_UNDERLINE_DOUBLE:PANGO_UNDERLINE_SINGLE;
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else
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underline = (celltext->underline) ? PANGO_UNDERLINE_SINGLE:PANGO_UNDERLINE_NONE;
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attr = pango_attr_underline_new (underline);
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attr->start_index = 0;
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attr->end_index = G_MAXINT;
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pango_attr_list_change (celltext->attr_list, attr);
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pango_layout_set_attributes (layout, celltext->attr_list);
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gdk_gc_set_clip_rectangle (font_gc, cell_area);
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real_xoffset = cell->xalign * (cell_area->width - rect.width - (2 * cell->xpad));
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real_xoffset = MAX (real_xoffset, 0) + cell->xpad;
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real_yoffset = cell->yalign * (cell_area->height - rect.height - (2 * cell->ypad));
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real_yoffset = MAX (real_yoffset, 0) + cell->ypad;
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gdk_draw_layout (window,
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font_gc,
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cell_area->x + real_xoffset,
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cell_area->y + real_yoffset,
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layout);
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g_object_unref (G_OBJECT (layout));
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gdk_gc_set_clip_rectangle (font_gc, NULL);
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}
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