libgnt/libgnt

Make the combobox a tiny bit friendlier.
v2.7.3
2010-07-05, Sadrul Habib Chowdhury
ac8d8a62c098
Make the combobox a tiny bit friendlier.

Pressing the first letter of an item will now jump to that item (and
popup the dropdown first if necessary). Add some API in libgnt in the
process.
/**
* GNT - The GLib Ncurses Toolkit
*
* GNT is the legal property of its developers, whose names are too numerous
* to list here. Please refer to the COPYRIGHT file distributed with this
* source distribution.
*
* This library is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111-1301 USA
*/
#include <stdlib.h>
#include <string.h>
#include "gntinternal.h"
#include "gntbutton.h"
#include "gntstyle.h"
#include "gntutils.h"
enum
{
SIGS = 1,
};
static GntWidgetClass *parent_class = NULL;
static gboolean small_button = FALSE;
static void
gnt_button_draw(GntWidget *widget)
{
GntButton *button = GNT_BUTTON(widget);
GntColorType type;
gboolean focus;
if ((focus = gnt_widget_has_focus(widget)))
type = GNT_COLOR_HIGHLIGHT;
else
type = GNT_COLOR_NORMAL;
wbkgdset(widget->window, '\0' | gnt_color_pair(type));
mvwaddstr(widget->window, (small_button) ? 0 : 1, 2, C_(button->priv->text));
if (small_button) {
type = GNT_COLOR_HIGHLIGHT;
mvwchgat(widget->window, 0, 0, widget->priv.width, focus ? A_BOLD : A_REVERSE, type, NULL);
}
GNTDEBUG;
}
static void
gnt_button_size_request(GntWidget *widget)
{
GntButton *button = GNT_BUTTON(widget);
gnt_util_get_text_bound(button->priv->text,
&widget->priv.width, &widget->priv.height);
widget->priv.width += 4;
if (!GNT_WIDGET_IS_FLAG_SET(widget, GNT_WIDGET_NO_BORDER))
widget->priv.height += 2;
}
static void
gnt_button_map(GntWidget *widget)
{
if (widget->priv.width == 0 || widget->priv.height == 0)
gnt_widget_size_request(widget);
GNTDEBUG;
}
static gboolean
gnt_button_clicked(GntWidget *widget, GntMouseEvent event, int x, int y)
{
if (event == GNT_LEFT_MOUSE_DOWN) {
gnt_widget_activate(widget);
return TRUE;
}
return FALSE;
}
static void
gnt_button_destroy(GntWidget *widget)
{
GntButton *button = GNT_BUTTON(widget);
g_free(button->priv->text);
g_free(button->priv);
}
static gboolean
button_activate(GntBindable *bind, GList *null)
{
gnt_widget_activate(GNT_WIDGET(bind));
return TRUE;
}
static void
gnt_button_class_init(GntWidgetClass *klass)
{
char *style;
GntBindableClass *bindable = GNT_BINDABLE_CLASS(klass);
parent_class = GNT_WIDGET_CLASS(klass);
parent_class->draw = gnt_button_draw;
parent_class->map = gnt_button_map;
parent_class->size_request = gnt_button_size_request;
parent_class->clicked = gnt_button_clicked;
parent_class->destroy = gnt_button_destroy;
style = gnt_style_get_from_name(NULL, "small-button");
small_button = gnt_style_parse_bool(style);
g_free(style);
gnt_bindable_class_register_action(bindable, "activate", button_activate,
GNT_KEY_ENTER, NULL);
gnt_style_read_actions(G_OBJECT_CLASS_TYPE(klass), GNT_BINDABLE_CLASS(klass));
}
static void
gnt_button_init(GTypeInstance *instance, gpointer class)
{
GntWidget *widget = GNT_WIDGET(instance);
GntButton *button = GNT_BUTTON(instance);
button->priv = g_new0(GntButtonPriv, 1);
widget->priv.minw = 4;
widget->priv.minh = small_button ? 1 : 3;
if (small_button)
GNT_WIDGET_SET_FLAGS(widget, GNT_WIDGET_NO_BORDER | GNT_WIDGET_NO_SHADOW);
GNT_WIDGET_UNSET_FLAGS(widget, GNT_WIDGET_GROW_X | GNT_WIDGET_GROW_Y);
GNTDEBUG;
}
/******************************************************************************
* GntButton API
*****************************************************************************/
GType
gnt_button_get_gtype(void) {
static GType type = 0;
if(type == 0) {
static const GTypeInfo info = {
sizeof(GntButtonClass),
NULL, /* base_init */
NULL, /* base_finalize */
(GClassInitFunc)gnt_button_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof(GntButton),
0, /* n_preallocs */
gnt_button_init, /* instance_init */
NULL /* value_table */
};
type = g_type_register_static(GNT_TYPE_WIDGET,
"GntButton",
&info, 0);
}
return type;
}
GntWidget *gnt_button_new(const char *text)
{
GntWidget *widget = g_object_new(GNT_TYPE_BUTTON, NULL);
GntButton *button = GNT_BUTTON(widget);
button->priv->text = gnt_util_onscreen_fit_string(text, -1);
gnt_widget_set_take_focus(widget, TRUE);
return widget;
}