qulogic/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 "gntinternal.h"
#include "gntprogressbar.h"
#include "gntutils.h"
#include <string.h>
typedef struct _GntProgressBarPrivate
{
gdouble fraction;
gboolean show_value;
GntProgressBarOrientation orientation;
} GntProgressBarPrivate;
struct _GntProgressBar
{
GntWidget parent;
#if !GLIB_CHECK_VERSION(2,4,0)
GntProgressBarPrivate priv;
#endif
};
#if GLIB_CHECK_VERSION(2,4,0)
#define GNT_PROGRESS_BAR_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), GNT_TYPE_PROGRESS_BAR, GntProgressBarPrivate))
#else
#define GNT_PROGRESS_BAR_GET_PRIVATE(o) &(GNT_PROGRESS_BAR(o)->priv)
#endif
static GntWidgetClass *parent_class = NULL;
static void
gnt_progress_bar_draw (GntWidget *widget)
{
GntProgressBarPrivate *priv = GNT_PROGRESS_BAR_GET_PRIVATE (GNT_PROGRESS_BAR (widget));
gchar progress[8];
gint start, end, i, pos;
int color;
g_snprintf (progress, sizeof (progress), "%.1f%%", priv->fraction * 100);
color = gnt_color_pair(GNT_COLOR_NORMAL);
switch (priv->orientation) {
case GNT_PROGRESS_LEFT_TO_RIGHT:
case GNT_PROGRESS_RIGHT_TO_LEFT:
start = (priv->orientation == GNT_PROGRESS_LEFT_TO_RIGHT ? 0 : (1.0 - priv->fraction) * widget->priv.width);
end = (priv->orientation == GNT_PROGRESS_LEFT_TO_RIGHT ? widget->priv.width * priv->fraction : widget->priv.width);
/* background */
for (i = 0; i < widget->priv.height; i++)
mvwhline (widget->window, i, 0, ' ' | color, widget->priv.width);
/* foreground */
for (i = 0; i < widget->priv.height; i++)
mvwhline (widget->window, i, start, ACS_CKBOARD | color | A_REVERSE, end);
/* text */
if (priv->show_value) {
pos = widget->priv.width / 2 - strlen (progress) / 2;
for (i = 0; i < progress[i]; i++, pos++) {
wattrset (widget->window, color | ((pos < start || pos > end) ? A_NORMAL : A_REVERSE));
mvwprintw (widget->window, widget->priv.height / 2, pos, "%c", progress[i]);
}
wattrset (widget->window, color);
}
break;
case GNT_PROGRESS_TOP_TO_BOTTOM:
case GNT_PROGRESS_BOTTOM_TO_TOP:
start = (priv->orientation == GNT_PROGRESS_TOP_TO_BOTTOM ? 0 : (1.0 - priv->fraction) * widget->priv.height);
end = (priv->orientation == GNT_PROGRESS_TOP_TO_BOTTOM ? widget->priv.height * priv->fraction : widget->priv.height);
/* background */
for (i = 0; i < widget->priv.width; i++)
mvwvline (widget->window, 0, i, ' ' | color, widget->priv.height);
/* foreground */
for (i = 0; i < widget->priv.width; i++)
mvwvline (widget->window, start, i, ACS_CKBOARD | color | A_REVERSE, end);
/* text */
if (priv->show_value) {
pos = widget->priv.height / 2 - strlen (progress) / 2;
for (i = 0; i < progress[i]; i++, pos++) {
wattrset (widget->window, color | ((pos < start || pos > end) ? A_NORMAL : A_REVERSE));
mvwprintw (widget->window, pos, widget->priv.width / 2, "%c\n", progress[i]);
}
wattrset (widget->window, color);
}
break;
default:
g_assert_not_reached ();
}
}
static void
gnt_progress_bar_size_request (GntWidget *widget)
{
gnt_widget_set_size (widget, widget->priv.minw, widget->priv.minh);
}
static void
gnt_progress_bar_class_init (gpointer klass, gpointer class_data)
{
GObjectClass *g_class = G_OBJECT_CLASS (klass);
parent_class = GNT_WIDGET_CLASS (klass);
#if GLIB_CHECK_VERSION(2,4,0)
g_type_class_add_private (g_class, sizeof (GntProgressBarPrivate));
#endif
parent_class->draw = gnt_progress_bar_draw;
parent_class->size_request = gnt_progress_bar_size_request;
}
static void
gnt_progress_bar_init (GTypeInstance *instance, gpointer g_class)
{
GntWidget *widget = GNT_WIDGET (instance);
GntProgressBarPrivate *priv = GNT_PROGRESS_BAR_GET_PRIVATE (GNT_PROGRESS_BAR (widget));
gnt_widget_set_take_focus (widget, FALSE);
GNT_WIDGET_SET_FLAGS (widget, GNT_WIDGET_NO_BORDER | GNT_WIDGET_NO_SHADOW | GNT_WIDGET_GROW_X);
widget->priv.minw = 8;
widget->priv.minh = 1;
priv->show_value = TRUE;
}
GType
gnt_progress_bar_get_type (void)
{
static GType type = 0;
if (type == 0) {
static const GTypeInfo info = {
sizeof (GntProgressBarClass),
NULL, /* base_init */
NULL, /* base_finalize */
gnt_progress_bar_class_init, /* class_init */
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GntProgressBar),
0, /* n_preallocs */
gnt_progress_bar_init, /* instance_init */
NULL /* value_table */
};
type = g_type_register_static (GNT_TYPE_WIDGET, "GntProgressBar", &info, 0);
}
return type;
}
GntWidget *
gnt_progress_bar_new (void)
{
GntWidget *widget = g_object_new (GNT_TYPE_PROGRESS_BAR, NULL);
return widget;
}
void
gnt_progress_bar_set_fraction (GntProgressBar *pbar, gdouble fraction)
{
GntProgressBarPrivate *priv = GNT_PROGRESS_BAR_GET_PRIVATE (pbar);
if (fraction > 1.0)
priv->fraction = 1.0;
else if (fraction < 0.0)
priv->fraction = 0.0;
else
priv->fraction = fraction;
if ((GNT_WIDGET_FLAGS(pbar) & GNT_WIDGET_MAPPED))
gnt_widget_draw(GNT_WIDGET(pbar));
}
void
gnt_progress_bar_set_orientation (GntProgressBar *pbar,
GntProgressBarOrientation orientation)
{
GntProgressBarPrivate *priv = GNT_PROGRESS_BAR_GET_PRIVATE (pbar);
GntWidget *widget = GNT_WIDGET(pbar);
priv->orientation = orientation;
if (orientation == GNT_PROGRESS_LEFT_TO_RIGHT ||
orientation == GNT_PROGRESS_RIGHT_TO_LEFT) {
GNT_WIDGET_SET_FLAGS(pbar, GNT_WIDGET_GROW_X);
GNT_WIDGET_UNSET_FLAGS(pbar, GNT_WIDGET_GROW_Y);
widget->priv.minw = 8;
widget->priv.minh = 1;
} else {
GNT_WIDGET_UNSET_FLAGS(pbar, GNT_WIDGET_GROW_X);
GNT_WIDGET_SET_FLAGS(pbar, GNT_WIDGET_GROW_Y);
widget->priv.minw = 1;
widget->priv.minh = 8;
}
if ((GNT_WIDGET_FLAGS(pbar) & GNT_WIDGET_MAPPED))
gnt_widget_draw(GNT_WIDGET(pbar));
}
void
gnt_progress_bar_set_show_progress (GntProgressBar *pbar, gboolean show)
{
GntProgressBarPrivate *priv = GNT_PROGRESS_BAR_GET_PRIVATE (pbar);
priv->show_value = show;
}
gdouble
gnt_progress_bar_get_fraction (GntProgressBar *pbar)
{
GntProgressBarPrivate *priv = GNT_PROGRESS_BAR_GET_PRIVATE (pbar);
return priv->fraction;
}
GntProgressBarOrientation
gnt_progress_bar_get_orientation (GntProgressBar *pbar)
{
GntProgressBarPrivate *priv = GNT_PROGRESS_BAR_GET_PRIVATE (pbar);
return priv->orientation;
}
gboolean
gnt_progress_bar_get_show_progress (GntProgressBar *pbar)
{
GntProgressBarPrivate *priv = GNT_PROGRESS_BAR_GET_PRIVATE (pbar);
return priv->show_value;
}