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gtk2/gtk/gtkfontchooser.c
Matthias Clasen 1207757924 Keep the currently selected font over theme changes 
When repopulating the list of fonts, don't loose the current
selection, unless the font is no longer in the list.
2011-08-15 18:57:57 -04:00

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/* GTK - The GIMP Toolkit
* Copyright (C) 2011 Alberto Ruiz <aruiz@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 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.
*/
#include "config.h"
#include <stdlib.h>
#include <glib/gprintf.h>
#include <string.h>
#include <atk/atk.h>
#include "gtkfontchooser.h"
#include "gtkcellrenderertext.h"
#include "gtkentry.h"
#include "gtkframe.h"
#include "gtkhbbox.h"
#include "gtkhbox.h"
#include "gtklabel.h"
#include "gtkliststore.h"
#include "gtkstock.h"
#include "gtktextview.h"
#include "gtktreeselection.h"
#include "gtktreeview.h"
#include "gtkbox.h"
#include "gtkscrolledwindow.h"
#include "gtkintl.h"
#include "gtkaccessible.h"
#include "gtkbuildable.h"
#include "gtkprivate.h"
#include "gtkalignment.h"
#include "gtkscale.h"
#include "gtkbox.h"
#include "gtkspinbutton.h"
#include "gtknotebook.h"
#include "gtkwidget.h"
#include "gtkgrid.h"
/**
* SECTION:gtkfontchooser
* @Short_description: A widget for selecting fonts
* @Title: GtkFontChooser
* @See_also: #GtkFontChooserDialog
*
* The #GtkFontChooser widget lists the available fonts, styles and sizes,
* allowing the user to select a font.
* It is used in the #GtkFontChooserDialog widget to provide a dialog box for
* selecting fonts.
*
* To set the font which is initially selected, use
* gtk_font_chooser_set_font_name().
*
* To get the selected font use gtk_font_chooser_get_font_name().
*
* To change the text which is shown in the preview area, use
* gtk_font_chooser_set_preview_text().
*
* Since: 3.2
*/
struct _GtkFontChooserPrivate
{
GtkWidget *search_entry;
GtkWidget *family_face_list;
GtkWidget *list_scrolled_window;
GtkWidget *empty_list;
GtkWidget *list_notebook;
GtkListStore *model;
GtkTreeModel *filter_model;
GtkWidget *preview;
gchar *preview_text;
gboolean show_preview_entry;
GtkWidget *size_spin;
GtkWidget *size_slider;
gint size;
PangoFontFace *face;
PangoFontFamily *family;
gulong cursor_changed_handler;
GtkFontFilterFunc filter_func;
gpointer filter_data;
GDestroyNotify filter_data_destroy;
};
#define DEFAULT_FONT_NAME "Sans 10"
#define MAX_FONT_SIZE 999
/* This is the initial fixed height and the top padding of the preview entry */
#define PREVIEW_HEIGHT 72
#define PREVIEW_TOP_PADDING 6
/* These are the sizes of the font, style & size lists. */
#define FONT_LIST_HEIGHT 136
#define FONT_LIST_WIDTH 190
#define FONT_STYLE_LIST_WIDTH 170
#define FONT_SIZE_LIST_WIDTH 60
#define ROW_FORMAT_STRING "<span weight=\"bold\" size=\"small\">%s</span>\n<span size=\"x-large\" font_desc=\"%s\">%s</span>"
#define NO_FONT_MATCHED_SEARCH "No fonts matched your search. You can revise your search and try again."
/* These are what we use as the standard font sizes, for the size list.
*/
static const gint font_sizes[] = {
6, 8, 9, 10, 11, 12, 13, 14, 16, 20, 24, 36, 48, 72
};
enum {
PROP_0,
PROP_FONT_NAME,
PROP_PREVIEW_TEXT,
PROP_SHOW_PREVIEW_ENTRY
};
enum {
FAMILY_COLUMN,
FACE_COLUMN,
PREVIEW_TEXT_COLUMN,
PREVIEW_TITLE_COLUMN
};
static void gtk_font_chooser_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_font_chooser_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static void gtk_font_chooser_finalize (GObject *object);
static void gtk_font_chooser_dispose (GObject *object);
static void gtk_font_chooser_screen_changed (GtkWidget *widget,
GdkScreen *previous_screen);
static void gtk_font_chooser_style_updated (GtkWidget *widget);
static void gtk_font_chooser_bootstrap_fontlist (GtkFontChooser *fontchooser);
G_DEFINE_TYPE (GtkFontChooser, gtk_font_chooser, GTK_TYPE_BOX)
static void
gtk_font_chooser_class_init (GtkFontChooserClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
widget_class->screen_changed = gtk_font_chooser_screen_changed;
widget_class->style_updated = gtk_font_chooser_style_updated;
gobject_class->dispose = gtk_font_chooser_dispose;
gobject_class->finalize = gtk_font_chooser_finalize;
gobject_class->set_property = gtk_font_chooser_set_property;
gobject_class->get_property = gtk_font_chooser_get_property;
g_object_class_install_property (gobject_class,
PROP_FONT_NAME,
g_param_spec_string ("font-name",
P_("Font name"),
P_("The string that represents this font"),
DEFAULT_FONT_NAME,
GTK_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_PREVIEW_TEXT,
g_param_spec_string ("preview-text",
P_("Preview text"),
P_("The text to display in order to demonstrate the selected font"),
pango_language_get_sample_string (NULL),
GTK_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_SHOW_PREVIEW_ENTRY,
g_param_spec_boolean ("show-preview-entry",
P_("Show preview text entry"),
P_("Whether the preview text entry is shown or not"),
TRUE,
GTK_PARAM_READWRITE));
g_type_class_add_private (klass, sizeof (GtkFontChooserPrivate));
}
static void
gtk_font_chooser_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkFontChooser *fontchooser;
fontchooser = GTK_FONT_CHOOSER (object);
switch (prop_id)
{
case PROP_FONT_NAME:
gtk_font_chooser_set_font_name (fontchooser, g_value_get_string (value));
break;
case PROP_PREVIEW_TEXT:
gtk_font_chooser_set_preview_text (fontchooser, g_value_get_string (value));
break;
case PROP_SHOW_PREVIEW_ENTRY:
gtk_font_chooser_set_show_preview_entry (fontchooser, g_value_get_boolean (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_font_chooser_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkFontChooser *fontchooser;
fontchooser = GTK_FONT_CHOOSER (object);
switch (prop_id)
{
case PROP_FONT_NAME:
g_value_take_string (value, gtk_font_chooser_get_font_name (fontchooser));
break;
case PROP_PREVIEW_TEXT:
g_value_set_string (value, gtk_font_chooser_get_preview_text (fontchooser));
break;
case PROP_SHOW_PREVIEW_ENTRY:
g_value_set_boolean (value, gtk_font_chooser_get_show_preview_entry (fontchooser));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
text_changed_cb (GtkEntry *entry,
GParamSpec *pspec,
GtkFontChooser *fc)
{
GtkFontChooserPrivate *priv = fc->priv;
const gchar *text;
text = gtk_entry_get_text (entry);
if (text == NULL || text[0] == '\0')
{
GIcon *icon;
icon = g_themed_icon_new_with_default_fallbacks ("edit-find-symbolic");
g_object_set (G_OBJECT (priv->search_entry),
"secondary-icon-gicon", icon,
"secondary-icon-activatable", FALSE,
"secondary-icon-sensitive", FALSE,
NULL);
g_object_unref (icon);
}
else
{
if (!gtk_entry_get_icon_activatable (GTK_ENTRY (priv->search_entry), GTK_ENTRY_ICON_SECONDARY))
{
GIcon *icon;
icon = g_themed_icon_new_with_default_fallbacks ("edit-clear-symbolic");
g_object_set (G_OBJECT (priv->search_entry),
"secondary-icon-gicon", icon,
"secondary-icon-activatable", TRUE,
"secondary-icon-sensitive", TRUE,
NULL);
g_object_unref (icon);
}
}
gtk_tree_model_filter_refilter (GTK_TREE_MODEL_FILTER (priv->filter_model));
}
static void
icon_press_cb (GtkEntry *entry,
GtkEntryIconPosition pos,
GdkEvent *event,
gpointer user_data)
{
gtk_entry_set_text (entry, "");
}
static void
slider_change_cb (GtkAdjustment *adjustment,
gpointer user_data)
{
GtkFontChooser *fc = (GtkFontChooser*)user_data;
GtkFontChooserPrivate *priv = fc->priv;
GtkAdjustment *spin_adj = gtk_spin_button_get_adjustment(GTK_SPIN_BUTTON (priv->size_spin));
gdouble slider_value = gtk_adjustment_get_value (adjustment);
gdouble spin_value = gtk_adjustment_get_value (spin_adj);
if (slider_value != spin_value)
gtk_adjustment_set_value (spin_adj,
gtk_adjustment_get_value (adjustment));
}
static void
spin_change_cb (GtkAdjustment *adjustment,
gpointer user_data)
{
PangoFontDescription *desc;
GtkFontChooser *fontchooser = (GtkFontChooser*)user_data;
GtkFontChooserPrivate *priv = fontchooser->priv;
GtkAdjustment *slider_adj = gtk_range_get_adjustment (GTK_RANGE (priv->size_slider));
gdouble size = gtk_adjustment_get_value (adjustment);
priv->size = ((gint)size) * PANGO_SCALE;
desc = pango_context_get_font_description (gtk_widget_get_pango_context (priv->preview));
pango_font_description_set_size (desc, priv->size);
gtk_widget_override_font (priv->preview, desc);
g_object_notify (G_OBJECT (fontchooser), "font-name");
/* If the new value is lower than the lower bound of the slider, we set
* the slider adjustment to the lower bound value if it is not already set
*/
if (size < gtk_adjustment_get_lower (slider_adj) &&
gtk_adjustment_get_value (slider_adj) != gtk_adjustment_get_lower (slider_adj))
gtk_adjustment_set_value (slider_adj, gtk_adjustment_get_lower (slider_adj));
/* If the new value is upper than the upper bound of the slider, we set
* the slider adjustment to the upper bound value if it is not already set
*/
else if (size > gtk_adjustment_get_upper (slider_adj) &&
gtk_adjustment_get_value (slider_adj) != gtk_adjustment_get_upper (slider_adj))
gtk_adjustment_set_value (slider_adj, gtk_adjustment_get_upper (slider_adj));
/* If the new value is not already set on the slider we set it */
else if (size != gtk_adjustment_get_value (slider_adj))
gtk_adjustment_set_value (slider_adj, size);
gtk_widget_queue_draw (priv->preview);
}
static void
set_range_marks (GtkFontChooserPrivate *priv,
GtkWidget *size_slider,
gint *sizes,
gint length)
{
GtkAdjustment *adj;
gint i;
gdouble value;
if (length < 2)
{
sizes = (gint*)font_sizes;
length = G_N_ELEMENTS (font_sizes);
}
gtk_scale_clear_marks (GTK_SCALE (size_slider));
adj = gtk_range_get_adjustment(GTK_RANGE (size_slider));
gtk_adjustment_set_lower (adj, (gdouble) sizes[0]);
gtk_adjustment_set_upper (adj, (gdouble) sizes[length-1]);
value = gtk_adjustment_get_value (adj);
if (value > (gdouble) sizes[length-1])
gtk_adjustment_set_value (adj, (gdouble) sizes[length-1]);
else if (value < (gdouble) sizes[0])
gtk_adjustment_set_value (adj, (gdouble) sizes[0]);
for (i = 0; i < length; i++)
gtk_scale_add_mark (GTK_SCALE (size_slider),
(gdouble) sizes[i],
GTK_POS_BOTTOM, NULL);
}
static void
cursor_changed_cb (GtkTreeView *treeview,
gpointer user_data)
{
GtkFontChooser *fontchooser = (GtkFontChooser*)user_data;
GtkFontChooserPrivate *priv = fontchooser->priv;
PangoFontFamily *family;
PangoFontFace *face;
PangoFontDescription *desc;
gint *sizes;
gint i, n_sizes;
GtkTreeIter iter;
GtkTreePath *path = gtk_tree_path_new ();
gtk_tree_view_get_cursor (treeview, &path, NULL);
if (!path)
return;
if (!gtk_tree_model_get_iter (GTK_TREE_MODEL (priv->filter_model), &iter, path))
{
gtk_tree_path_free (path);
return;
}
gtk_tree_model_get (GTK_TREE_MODEL (priv->filter_model), &iter,
FACE_COLUMN, &face,
FAMILY_COLUMN, &family,
-1);
gtk_tree_view_scroll_to_cell (treeview, path, NULL, FALSE, 0.5, 0.5);
gtk_tree_path_free (path);
path = NULL;
if (face == NULL || family == NULL)
{
if (face)
g_object_unref (face);
if (family)
g_object_unref (family);
return;
}
desc = pango_font_face_describe (face);
pango_font_description_set_size (desc, priv->size);
gtk_widget_override_font (priv->preview, desc);
pango_font_face_list_sizes (face, &sizes, &n_sizes);
/* It seems not many fonts actually have a sane set of sizes */
for (i = 0; i < n_sizes; i++)
sizes[i] = sizes[i] / PANGO_SCALE;
set_range_marks (priv, priv->size_slider, sizes, n_sizes);
if (priv->family)
g_object_unref (priv->family);
priv->family = family;
if (priv->face)
g_object_unref (priv->face);
priv->face = face;
pango_font_description_free (desc);
g_object_notify (G_OBJECT (fontchooser), "font-name");
}
static gboolean
zoom_preview_cb (GtkWidget *scrolled_window,
GdkEventScroll *event,
gpointer user_data)
{
GtkFontChooser *fc = (GtkFontChooser*)user_data;
GtkFontChooserPrivate *priv = fc->priv;
GtkAdjustment *adj = gtk_spin_button_get_adjustment (GTK_SPIN_BUTTON (priv->size_spin));
if (event->direction == GDK_SCROLL_UP || event->direction == GDK_SCROLL_RIGHT)
gtk_adjustment_set_value (adj,
gtk_adjustment_get_value (adj) +
gtk_adjustment_get_step_increment (adj));
else if (event->direction == GDK_SCROLL_DOWN || event->direction == GDK_SCROLL_LEFT)
gtk_adjustment_set_value (adj,
gtk_adjustment_get_value (adj) -
gtk_adjustment_get_step_increment (adj));
return TRUE;
}
static void
row_inserted_cb (GtkTreeModel *model,
GtkTreePath *path,
GtkTreeIter *iter,
gpointer user_data)
{
GtkFontChooser *fontchooser = (GtkFontChooser*)user_data;
GtkFontChooserPrivate *priv = fontchooser->priv;
gtk_notebook_set_current_page (GTK_NOTEBOOK (priv->list_notebook), 0);
}
static void
row_deleted_cb (GtkTreeModel *model,
GtkTreePath *path,
gpointer user_data)
{
GtkFontChooser *fontchooser = (GtkFontChooser*)user_data;
GtkFontChooserPrivate *priv = fontchooser->priv;
if (gtk_tree_model_iter_n_children (model, NULL) == 0)
gtk_notebook_set_current_page (GTK_NOTEBOOK (priv->list_notebook), 1);
}
static void
gtk_font_chooser_init (GtkFontChooser *fontchooser)
{
GIcon *icon;
GtkFontChooserPrivate *priv;
PangoFontDescription *font_desc;
GtkWidget *scrolled_win;
GtkWidget *grid;
fontchooser->priv = G_TYPE_INSTANCE_GET_PRIVATE (fontchooser,
GTK_TYPE_FONT_CHOOSER,
GtkFontChooserPrivate);
priv = fontchooser->priv;
/* Default preview string */
priv->preview_text = g_strdup (pango_language_get_sample_string (NULL));
priv->show_preview_entry = TRUE;
/* Getting the default size */
font_desc = pango_context_get_font_description (gtk_widget_get_pango_context (GTK_WIDGET (fontchooser)));
priv->size = pango_font_description_get_size (font_desc);
priv->face = NULL;
priv->family = NULL;
gtk_widget_push_composite_child ();
/* Creating fundamental widgets for the private struct */
priv->search_entry = gtk_entry_new ();
priv->family_face_list = gtk_tree_view_new ();
priv->preview = gtk_entry_new ();
priv->size_slider = gtk_scale_new_with_range (GTK_ORIENTATION_HORIZONTAL,
(gdouble) font_sizes[0],
(gdouble) font_sizes[G_N_ELEMENTS (font_sizes) - 1],
1.0);
priv->size_spin = gtk_spin_button_new_with_range (0.0, (gdouble)(G_MAXINT / PANGO_SCALE), 1.0);
/** Bootstrapping widget layout **/
gtk_box_set_spacing (GTK_BOX (fontchooser), 6);
/* Main font family/face view */
priv->list_scrolled_window = gtk_scrolled_window_new (NULL, NULL);
scrolled_win = priv->list_scrolled_window;
gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scrolled_win),
GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (scrolled_win),
GTK_SHADOW_ETCHED_IN);
gtk_widget_set_size_request (scrolled_win, 400, 300);
gtk_container_add (GTK_CONTAINER (scrolled_win), priv->family_face_list);
/* Text to display when list is empty */
priv->empty_list = gtk_label_new (_(NO_FONT_MATCHED_SEARCH));
gtk_widget_set_margin_top (priv->empty_list, 12);
gtk_widget_set_margin_left (priv->empty_list, 12);
gtk_widget_set_margin_right (priv->empty_list, 12);
gtk_widget_set_margin_bottom (priv->empty_list, 12);
gtk_widget_set_halign (priv->empty_list, GTK_ALIGN_CENTER);
gtk_widget_set_valign (priv->empty_list, GTK_ALIGN_START);
priv->list_notebook = gtk_notebook_new ();
gtk_notebook_set_show_tabs (GTK_NOTEBOOK (priv->list_notebook), FALSE);
gtk_notebook_append_page (GTK_NOTEBOOK (priv->list_notebook), scrolled_win, NULL);
gtk_notebook_append_page (GTK_NOTEBOOK (priv->list_notebook), priv->empty_list, NULL);
/* Basic layout */
grid = gtk_grid_new ();
gtk_grid_set_column_spacing (GTK_GRID (grid), 6);
gtk_grid_set_row_spacing (GTK_GRID (grid), 6);
gtk_grid_attach (GTK_GRID (grid), priv->search_entry, 0, 0, 2, 1);
gtk_grid_attach (GTK_GRID (grid), priv->list_notebook, 0, 1, 2, 1);
gtk_grid_attach (GTK_GRID (grid), priv->preview, 0, 2, 2, 1);
gtk_grid_attach (GTK_GRID (grid), priv->size_slider, 0, 3, 1, 1);
gtk_grid_attach (GTK_GRID (grid), priv->size_spin, 1, 3, 1, 1);
gtk_widget_set_hexpand (GTK_WIDGET (scrolled_win), TRUE);
gtk_widget_set_vexpand (GTK_WIDGET (scrolled_win), TRUE);
gtk_widget_set_hexpand (GTK_WIDGET (priv->search_entry), TRUE);
gtk_widget_set_hexpand (GTK_WIDGET (priv->size_slider), TRUE);
gtk_widget_set_hexpand (GTK_WIDGET (priv->size_spin), FALSE);
gtk_box_pack_start (GTK_BOX (fontchooser), grid, TRUE, TRUE, 0);
/* Setting the adjustment values for the size slider */
gtk_adjustment_set_value (gtk_range_get_adjustment (GTK_RANGE (priv->size_slider)),
(gdouble)(priv->size / PANGO_SCALE));
gtk_adjustment_set_value (gtk_spin_button_get_adjustment (GTK_SPIN_BUTTON (priv->size_spin)),
(gdouble)(priv->size / PANGO_SCALE));
gtk_widget_show_all (GTK_WIDGET (fontchooser));
gtk_widget_hide (GTK_WIDGET (fontchooser));
/* Treeview column and model bootstrapping */
gtk_font_chooser_bootstrap_fontlist (fontchooser);
/* Set default preview text */
gtk_entry_set_text (GTK_ENTRY (priv->preview),
pango_language_get_sample_string (NULL));
/* Set search icon and place holder text */
icon = g_themed_icon_new_with_default_fallbacks ("edit-find-symbolic");
g_object_set (G_OBJECT (priv->search_entry),
"secondary-icon-gicon", icon,
"secondary-icon-activatable", FALSE,
"secondary-icon-sensitive", FALSE,
NULL);
g_object_unref (icon);
gtk_entry_set_placeholder_text (GTK_ENTRY (priv->search_entry), _("Search font name"));
/** Callback connections **/
g_signal_connect (priv->search_entry, "notify::text",
G_CALLBACK (text_changed_cb), fontchooser);
g_signal_connect (priv->search_entry,
"icon-press", G_CALLBACK (icon_press_cb), NULL);
g_signal_connect (gtk_range_get_adjustment (GTK_RANGE (priv->size_slider)),
"value-changed", G_CALLBACK (slider_change_cb), fontchooser);
g_signal_connect (gtk_spin_button_get_adjustment (GTK_SPIN_BUTTON (priv->size_spin)),
"value-changed", G_CALLBACK (spin_change_cb), fontchooser);
priv->cursor_changed_handler =
g_signal_connect (priv->family_face_list, "cursor-changed",
G_CALLBACK (cursor_changed_cb), fontchooser);
/* Zoom on preview scroll*/
g_signal_connect (priv->preview, "scroll-event",
G_CALLBACK (zoom_preview_cb), fontchooser);
g_signal_connect (priv->size_slider, "scroll-event",
G_CALLBACK (zoom_preview_cb), fontchooser);
set_range_marks (priv, priv->size_slider, (gint*)font_sizes, G_N_ELEMENTS (font_sizes));
/* Font list empty hides the scrolledwindow */
g_signal_connect (G_OBJECT (priv->filter_model), "row-deleted",
G_CALLBACK (row_deleted_cb), fontchooser);
g_signal_connect (G_OBJECT (priv->filter_model), "row-inserted",
G_CALLBACK (row_inserted_cb), fontchooser);
/* Set default focus */
gtk_widget_pop_composite_child ();
}
/**
* gtk_font_chooser_new:
*
* Creates a new #GtkFontChooser.
*
* Return value: a new #GtkFontChooser
*
* Since: 3.2
*/
GtkWidget *
gtk_font_chooser_new (void)
{
GtkFontChooser *fontchooser;
fontchooser = g_object_new (GTK_TYPE_FONT_CHOOSER, NULL);
return GTK_WIDGET (fontchooser);
}
static int
cmp_families (const void *a,
const void *b)
{
const char *a_name = pango_font_family_get_name (*(PangoFontFamily **)a);
const char *b_name = pango_font_family_get_name (*(PangoFontFamily **)b);
return g_utf8_collate (a_name, b_name);
}
static void
populate_list (GtkFontChooser *fontchooser,
GtkTreeView *treeview,
GtkListStore *model)
{
GtkFontChooserPrivate *priv = fontchooser->priv;
GtkStyleContext *style_context;
PangoFontDescription *default_font;
PangoFontDescription *selected_font;
gint match;
GtkTreeIter match_row;
GtkTreePath *path;
gint n_families, i;
PangoFontFamily **families;
GString *tmp;
GString *family_and_face;
if (!gtk_widget_has_screen (GTK_WIDGET (fontchooser)))
return;
tmp = g_string_new (NULL);
family_and_face = g_string_new (NULL);
pango_context_list_families (gtk_widget_get_pango_context (GTK_WIDGET (treeview)),
&families,
&n_families);
qsort (families, n_families, sizeof (PangoFontFamily *), cmp_families);
/* Get theme font */
style_context = gtk_widget_get_style_context (GTK_WIDGET (treeview));
default_font = (PangoFontDescription*) gtk_style_context_get_font (style_context,
GTK_STATE_NORMAL);
if (priv->face)
selected_font = pango_font_face_describe (priv->face);
else
selected_font = NULL;
gtk_list_store_clear (model);
match = 0;
/* Iterate over families and faces */
for (i = 0; i < n_families; i++)
{
GtkTreeIter iter;
PangoFontFace **faces;
int j, n_faces;
const gchar *fam_name = pango_font_family_get_name (families[i]);
pango_font_family_list_faces (families[i], &faces, &n_faces);
for (j = 0; j < n_faces; j++)
{
PangoFontDescription *pango_desc;
const gchar *face_name;
gchar *font_desc;
if (priv->filter_func != NULL &&
!priv->filter_func (families[i], faces[j], priv->filter_data))
continue;
pango_desc = pango_font_face_describe (faces[j]);
face_name = pango_font_face_get_face_name (faces[j]);
font_desc = pango_font_description_to_string (pango_desc);
g_string_printf (family_and_face, "%s %s", fam_name, face_name);
g_string_printf (tmp, ROW_FORMAT_STRING,
family_and_face->str,
font_desc,
fontchooser->priv->preview_text);
gtk_list_store_append (model, &iter);
gtk_list_store_set (model, &iter,
FAMILY_COLUMN, families[i],
FACE_COLUMN, faces[j],
PREVIEW_TITLE_COLUMN, family_and_face->str,
PREVIEW_TEXT_COLUMN, tmp->str,
-1);
/* Select the current font,
* the default font/face from the theme,
* or the first font
*/
if (match < 3 &&
selected_font != NULL &&
pango_font_description_equal (selected_font, pango_desc))
{
match_row = iter;
match = 3;
}
if (match < 2 &&
strcmp (fam_name, pango_font_description_get_family (default_font)) == 0)
{
match_row = iter;
match = 2;
}
if (match < 1)
{
match_row = iter;
match = 1;
}
pango_font_description_free (pango_desc);
g_free (font_desc);
}
g_free (faces);
}
path = gtk_tree_model_get_path (GTK_TREE_MODEL (model), &match_row);
if (path)
{
gtk_tree_view_set_cursor (treeview, path, NULL, FALSE);
gtk_tree_view_scroll_to_cell (treeview, path, NULL, FALSE, 0.5, 0.5);
gtk_tree_path_free (path);
}
if (selected_font)
pango_font_description_free (selected_font);
g_string_free (family_and_face, TRUE);
g_string_free (tmp, TRUE);
g_free (families);
}
static gboolean
visible_func (GtkTreeModel *model,
GtkTreeIter *iter,
gpointer user_data)
{
gboolean result = TRUE;
GtkFontChooserPrivate *priv = (GtkFontChooserPrivate*)user_data;
const gchar *search_text = (const gchar*)gtk_entry_get_text (GTK_ENTRY (priv->search_entry));
gchar *font_name;
gchar *term;
gchar **split_terms;
gint n_terms = 0;
/* If there's no filter string we show the item */
if (strlen (search_text) == 0)
return TRUE;
gtk_tree_model_get (model, iter,
PREVIEW_TITLE_COLUMN, &font_name,
-1);
if (font_name == NULL)
return FALSE;
split_terms = g_strsplit (search_text, " ", 0);
term = split_terms[0];
while (term && result)
{
gchar* font_name_casefold = g_utf8_casefold (font_name, -1);
gchar* term_casefold = g_utf8_casefold (term, -1);
if (g_strrstr (font_name_casefold, term_casefold))
result = result && TRUE;
else
result = FALSE;
n_terms++;
term = split_terms[n_terms];
g_free (term_casefold);
g_free (font_name_casefold);
}
g_free (font_name);
g_strfreev (split_terms);
return result;
}
static void
gtk_font_chooser_bootstrap_fontlist (GtkFontChooser *fontchooser)
{
GtkFontChooserPrivate *priv = fontchooser->priv;
GtkTreeView *treeview = GTK_TREE_VIEW (priv->family_face_list);
GtkCellRenderer *cell;
GtkTreeViewColumn *col;
priv->model = gtk_list_store_new (4,
PANGO_TYPE_FONT_FAMILY,
PANGO_TYPE_FONT_FACE,
G_TYPE_STRING,
G_TYPE_STRING);
priv->filter_model = gtk_tree_model_filter_new (GTK_TREE_MODEL (priv->model), NULL);
g_object_unref (priv->model);
gtk_tree_model_filter_set_visible_func (GTK_TREE_MODEL_FILTER (priv->filter_model),
visible_func, (gpointer)priv, NULL);
gtk_tree_view_set_model (treeview, GTK_TREE_MODEL (priv->filter_model));
g_object_unref (priv->filter_model);
gtk_tree_view_set_rules_hint (treeview, TRUE);
gtk_tree_view_set_headers_visible (treeview, FALSE);
cell = gtk_cell_renderer_text_new ();
col = gtk_tree_view_column_new_with_attributes ("Family",
cell,
"markup", PREVIEW_TEXT_COLUMN,
NULL);
g_object_set (cell, "ellipsize", PANGO_ELLIPSIZE_END, NULL);
gtk_tree_view_append_column (treeview, col);
populate_list (fontchooser, treeview, priv->model);
}
static void
gtk_font_chooser_dispose (GObject *object)
{
GtkFontChooser *fontchooser = GTK_FONT_CHOOSER (object);
GtkFontChooserPrivate *priv = fontchooser->priv;
if (priv->cursor_changed_handler != 0)
{
g_signal_handler_disconnect (priv->family_face_list,
priv->cursor_changed_handler);
priv->cursor_changed_handler = 0;
}
G_OBJECT_CLASS (gtk_font_chooser_parent_class)->dispose (object);
}
static void
gtk_font_chooser_finalize (GObject *object)
{
GtkFontChooser *fontchooser = GTK_FONT_CHOOSER (object);
GtkFontChooserPrivate *priv = fontchooser->priv;
if (priv->family)
g_object_unref (priv->family);
if (priv->face)
g_object_unref (priv->face);
if (priv->filter_data_destroy)
priv->filter_data_destroy (priv->filter_data);
G_OBJECT_CLASS (gtk_font_chooser_parent_class)->finalize (object);
}
static void
gtk_font_chooser_screen_changed (GtkWidget *widget,
GdkScreen *previous_screen)
{
GtkFontChooser *fontchooser = GTK_FONT_CHOOSER (widget);
populate_list (fontchooser,
GTK_TREE_VIEW (fontchooser->priv->family_face_list),
fontchooser->priv->model);
}
static void
gtk_font_chooser_style_updated (GtkWidget *widget)
{
GtkFontChooser *fontchooser = GTK_FONT_CHOOSER (widget);
GTK_WIDGET_CLASS (gtk_font_chooser_parent_class)->style_updated (widget);
populate_list (fontchooser,
GTK_TREE_VIEW (fontchooser->priv->family_face_list),
fontchooser->priv->model);
}
/**
* gtk_font_chooser_get_family:
* @fontchooser: a #GtkFontChooser
*
* Gets the #PangoFontFamily representing the selected font family.
* Font families are a collection of font faces.
*
* Return value: (transfer none): A #PangoFontFamily representing the
* selected font family. The returned object is owned by @fontchooser
* and must not be modified or freed.
*
* Since: 3.2
*/
PangoFontFamily *
gtk_font_chooser_get_family (GtkFontChooser *fontchooser)
{
g_return_val_if_fail (GTK_IS_FONT_CHOOSER (fontchooser), NULL);
return fontchooser->priv->family;
}
/**
* gtk_font_chooser_get_face:
* @fontchooser: a #GtkFontChooser
*
* Gets the #PangoFontFace representing the selected font group
* details (i.e. family, slant, weight, width, etc).
*
* Return value: (transfer none): A #PangoFontFace representing the
* selected font group details. The returned object is owned by
* @fontchooser and must not be modified or freed.
*
* Since: 3.2
*/
PangoFontFace *
gtk_font_chooser_get_face (GtkFontChooser *fontchooser)
{
g_return_val_if_fail (GTK_IS_FONT_CHOOSER (fontchooser), NULL);
return fontchooser->priv->face;
}
/**
* gtk_font_chooser_get_size:
* @fontchooser: a #GtkFontChooser
*
* The selected font size.
*
* Return value: A n integer representing the selected font size,
* or -1 if no font size is selected.
*
* Since: 3.2
*/
gint
gtk_font_chooser_get_size (GtkFontChooser *fontchooser)
{
g_return_val_if_fail (GTK_IS_FONT_CHOOSER (fontchooser), -1);
return fontchooser->priv->size;
}
/**
* gtk_font_chooser_get_font_name:
* @fontchooser: a #GtkFontChooser
*
* Gets the currently-selected font name.
*
* Note that this can be a different string than what you set with
* gtk_font_chooser_set_font_name(), as the font chooser widget may
* normalize font names and thus return a string with a different
* structure. For example, "Helvetica Italic Bold 12" could be
* normalized to "Helvetica Bold Italic 12".
*
* Use pango_font_description_equal() if you want to compare two
* font descriptions.
*
* Return value: (transfer full) (allow-none): A string with the name
* of the current font, or %NULL if no font is selected. You must
* free this string with g_free().
*
* Since: 3.2
*/
gchar *
gtk_font_chooser_get_font_name (GtkFontChooser *fontchooser)
{
gchar *font_name;
gchar *font_desc_name;
PangoFontDescription *desc;
if (!fontchooser->priv->face)
return NULL;
desc = pango_font_face_describe (fontchooser->priv->face);
font_desc_name = pango_font_description_to_string (desc);
pango_font_description_free (desc);
font_name = g_strdup_printf ("%s %d", font_desc_name, fontchooser->priv->size / PANGO_SCALE);
g_free (font_desc_name);
return font_name;
}
/**
* gtk_font_chooser_set_font_name:
* @fontchooser: a #GtkFontChooser
* @fontname: a font name like "Helvetica 12" or "Times Bold 18"
*
* Sets the currently-selected font.
*
* Note that the @fontchooser needs to know the screen in which
* it will appear for this to work; this can be guaranteed by simply
* making sure that the @fontchooser is inserted in a toplevel window
* before you call this function.
*
* Return value: %TRUE if the font could be set successfully; %FALSE
* if no such font exists or if the @fontchooser doesn't belong
* to a particular screen yet.
*
* Since: 3.2
*/
gboolean
gtk_font_chooser_set_font_name (GtkFontChooser *fontchooser,
const gchar *fontname)
{
GtkFontChooserPrivate *priv = fontchooser->priv;
GtkTreeIter iter;
gboolean valid;
gchar *family_name;
PangoFontDescription *desc;
gboolean found = FALSE;
g_return_val_if_fail (GTK_IS_FONT_CHOOSER (fontchooser), FALSE);
g_return_val_if_fail (fontname != NULL, FALSE);
if (!gtk_widget_has_screen (GTK_WIDGET (fontchooser)))
return FALSE;
desc = pango_font_description_from_string (fontname);
family_name = (gchar*)pango_font_description_get_family (desc);
if (!family_name)
{
pango_font_description_free (desc);
return FALSE;
}
/* We make sure the filter is clear */
gtk_entry_set_text (GTK_ENTRY (priv->search_entry), "");
/* We find the matching family/face */
for (valid = gtk_tree_model_get_iter_first (GTK_TREE_MODEL (priv->filter_model), &iter);
valid;
valid = gtk_tree_model_iter_next (GTK_TREE_MODEL (priv->filter_model), &iter))
{
PangoFontFace *face;
PangoFontDescription *tmp_desc;
gtk_tree_model_get (GTK_TREE_MODEL (priv->filter_model), &iter,
FACE_COLUMN, &face,
-1);
tmp_desc = pango_font_face_describe (face);
if (pango_font_description_get_size_is_absolute (desc))
pango_font_description_set_absolute_size (tmp_desc,
pango_font_description_get_size (desc));
else
pango_font_description_set_size (tmp_desc,
pango_font_description_get_size (desc));
if (pango_font_description_equal (desc, tmp_desc))
{
GtkTreePath *path;
gint size = pango_font_description_get_size (desc);
if (size)
{
if (pango_font_description_get_size_is_absolute (desc))
size = size * PANGO_SCALE;
gtk_spin_button_set_value (GTK_SPIN_BUTTON (priv->size_spin),
size / PANGO_SCALE);
}
path = gtk_tree_model_get_path (GTK_TREE_MODEL (priv->filter_model), &iter);
if (path)
{
gtk_tree_view_set_cursor (GTK_TREE_VIEW (priv->family_face_list),
path,
NULL,
FALSE);
gtk_tree_view_scroll_to_cell (GTK_TREE_VIEW (priv->family_face_list),
path,
NULL,
FALSE,
0.5,
0.5);
gtk_tree_path_free (path);
}
found = TRUE;
}
g_object_unref (face);
pango_font_description_free (tmp_desc);
if (found)
break;
}
pango_font_description_free (desc);
g_object_notify (G_OBJECT (fontchooser), "font-name");
return found;
}
/**
* gtk_font_chooser_get_preview_text:
* @fontchooser: a #GtkFontChooser
*
* Gets the text displayed in the preview area.
*
* Return value: (transfer none): the text displayed in the
* preview area. This string is owned by the widget and
* should not be modified or freed
*
* Since: 3.2
*/
const gchar*
gtk_font_chooser_get_preview_text (GtkFontChooser *fontchooser)
{
g_return_val_if_fail (GTK_IS_FONT_CHOOSER (fontchooser), NULL);
return (const gchar*)fontchooser->priv->preview_text;
}
/**
* gtk_font_chooser_set_preview_text:
* @fontchooser: a #GtkFontChooser
* @text: (transfer none): the text to display in the preview area
*
* Sets the text displayed in the preview area.
* The @text is used to show how the selected font looks.
*
* Since: 3.2
*/
void
gtk_font_chooser_set_preview_text (GtkFontChooser *fontchooser,
const gchar *text)
{
g_return_if_fail (GTK_IS_FONT_CHOOSER (fontchooser));
g_return_if_fail (text != NULL);
g_free (fontchooser->priv->preview_text);
fontchooser->priv->preview_text = g_strdup (text);
populate_list (fontchooser,
GTK_TREE_VIEW (fontchooser->priv->family_face_list),
fontchooser->priv->model);
gtk_entry_set_text (GTK_ENTRY (fontchooser->priv->preview), text);
g_object_notify (G_OBJECT (fontchooser), "preview-text");
}
/**
* gtk_font_chooser_get_show_preview_entry:
* @fontchooser: a #GtkFontChooser
*
* Returns whether the preview entry is shown or not.
*
* Return value: %TRUE if the preview entry is shown
* or %FALSE if it is hidden.
*
* Since: 3.2
*/
gboolean
gtk_font_chooser_get_show_preview_entry (GtkFontChooser *fontchooser)
{
g_return_val_if_fail (GTK_IS_FONT_CHOOSER (fontchooser), FALSE);
return fontchooser->priv->show_preview_entry;
}
/**
* gtk_font_chooser_set_show_preview_entry:
* @fontchooser: a #GtkFontChooser
* @show_preview_entry: whether to show the editable preview entry or not
*
* Shows or hides the editable preview entry.
*
* Since: 3.2
*/
void
gtk_font_chooser_set_show_preview_entry (GtkFontChooser *fontchooser,
gboolean show_preview_entry)
{
GtkFontChooserPrivate *priv = fontchooser->priv;
g_return_if_fail (GTK_IS_FONT_CHOOSER (fontchooser));
if (priv->show_preview_entry != show_preview_entry)
{
fontchooser->priv->show_preview_entry = show_preview_entry;
if (show_preview_entry)
gtk_widget_show (fontchooser->priv->preview);
else
gtk_widget_hide (fontchooser->priv->preview);
g_object_notify (G_OBJECT (fontchooser), "show-preview-entry");
}
}
/**
* gtk_font_chooser_set_filter_func:
* @fontchooser: a #GtkFontChooser
* @filter: (allow-none): a #GtkFontFilterFunc, or %NULL
* @data: data to pass to @filter
* @destroy: function to call to free @data when it is no longer needed
*
* Adds a filter function that decides which fonts to display
* in the font chooser.
*
* Since: 3.2
*/
void
gtk_font_chooser_set_filter_func (GtkFontChooser *fontchooser,
GtkFontFilterFunc filter,
gpointer data,
GDestroyNotify destroy)
{
GtkFontChooserPrivate *priv = fontchooser->priv;
g_return_if_fail (GTK_IS_FONT_CHOOSER (fontchooser));
if (priv->filter_data_destroy)
priv->filter_data_destroy (priv->filter_data);
priv->filter_func = filter;
priv->filter_data = data;
priv->filter_data_destroy = destroy;
populate_list (fontchooser,
GTK_TREE_VIEW (priv->family_face_list),
priv->model);
}
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