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
*/
/* Stuff brutally ripped from Gflib */
#include "gntinternal.h"
#include "gntwidget.h"
#include "gntstyle.h"
#include "gntmarshal.h"
#include "gntutils.h"
#include "gnt.h"
enum
{
SIG_DESTROY,
SIG_DRAW,
SIG_HIDE,
SIG_GIVE_FOCUS,
SIG_LOST_FOCUS,
SIG_KEY_PRESSED,
SIG_MAP,
SIG_ACTIVATE,
SIG_EXPOSE,
SIG_SIZE_REQUEST,
SIG_CONFIRM_SIZE,
SIG_SIZE_CHANGED,
SIG_POSITION,
SIG_CLICKED,
SIG_CONTEXT_MENU,
SIGS
};
static GObjectClass *parent_class = NULL;
static guint signals[SIGS] = { 0 };
static void init_widget(GntWidget *widget);
static void
gnt_widget_init(GTypeInstance *instance, gpointer class)
{
GntWidget *widget = GNT_WIDGET(instance);
widget->priv.name = NULL;
GNTDEBUG;
}
static void
gnt_widget_map(GntWidget *widget)
{
/* Get some default size for the widget */
GNTDEBUG;
g_signal_emit(widget, signals[SIG_MAP], 0);
GNT_WIDGET_SET_FLAGS(widget, GNT_WIDGET_MAPPED);
}
static void
gnt_widget_dispose(GObject *obj)
{
GntWidget *self = GNT_WIDGET(obj);
g_signal_emit(self, signals[SIG_DESTROY], 0);
parent_class->dispose(obj);
GNTDEBUG;
}
static void
gnt_widget_focus_change(GntWidget *widget)
{
if (GNT_WIDGET_FLAGS(widget) & GNT_WIDGET_MAPPED)
gnt_widget_draw(widget);
}
static gboolean
gnt_widget_dummy_confirm_size(GntWidget *widget, int width, int height)
{
gboolean shadow;
if (width < widget->priv.minw || height < widget->priv.minh)
return FALSE;
shadow = gnt_widget_has_shadow(widget);
if (widget->priv.width + shadow != width && !GNT_WIDGET_IS_FLAG_SET(widget, GNT_WIDGET_GROW_X))
return FALSE;
if (widget->priv.height + shadow != height && !GNT_WIDGET_IS_FLAG_SET(widget, GNT_WIDGET_GROW_Y))
return FALSE;
return TRUE;
}
static gboolean
context_menu(GntBindable *bind, GList *null)
{
gboolean ret = FALSE;
g_signal_emit(bind, signals[SIG_CONTEXT_MENU], 0, &ret);
return ret;
}
static void
gnt_widget_class_init(GntWidgetClass *klass)
{
GObjectClass *obj_class = G_OBJECT_CLASS(klass);
parent_class = g_type_class_peek_parent(klass);
obj_class->dispose = gnt_widget_dispose;
klass->destroy = gnt_widget_destroy;
klass->show = gnt_widget_show;
klass->draw = gnt_widget_draw;
klass->expose = gnt_widget_expose;
klass->map = gnt_widget_map;
klass->lost_focus = gnt_widget_focus_change;
klass->gained_focus = gnt_widget_focus_change;
klass->confirm_size = gnt_widget_dummy_confirm_size;
klass->key_pressed = NULL;
klass->activate = NULL;
klass->clicked = NULL;
signals[SIG_DESTROY] =
g_signal_new("destroy",
G_TYPE_FROM_CLASS(klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET(GntWidgetClass, destroy),
NULL, NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE, 0);
signals[SIG_GIVE_FOCUS] =
g_signal_new("gained-focus",
G_TYPE_FROM_CLASS(klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET(GntWidgetClass, gained_focus),
NULL, NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE, 0);
signals[SIG_LOST_FOCUS] =
g_signal_new("lost-focus",
G_TYPE_FROM_CLASS(klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET(GntWidgetClass, lost_focus),
NULL, NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE, 0);
signals[SIG_ACTIVATE] =
g_signal_new("activate",
G_TYPE_FROM_CLASS(klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET(GntWidgetClass, activate),
NULL, NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE, 0);
signals[SIG_MAP] =
g_signal_new("map",
G_TYPE_FROM_CLASS(klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET(GntWidgetClass, map),
NULL, NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE, 0);
signals[SIG_DRAW] =
g_signal_new("draw",
G_TYPE_FROM_CLASS(klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET(GntWidgetClass, draw),
NULL, NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE, 0);
signals[SIG_HIDE] =
g_signal_new("hide",
G_TYPE_FROM_CLASS(klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET(GntWidgetClass, hide),
NULL, NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE, 0);
signals[SIG_EXPOSE] =
g_signal_new("expose",
G_TYPE_FROM_CLASS(klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET(GntWidgetClass, expose),
NULL, NULL,
gnt_closure_marshal_VOID__INT_INT_INT_INT,
G_TYPE_NONE, 4, G_TYPE_INT, G_TYPE_INT, G_TYPE_INT, G_TYPE_INT);
signals[SIG_POSITION] =
g_signal_new("position-set",
G_TYPE_FROM_CLASS(klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET(GntWidgetClass, set_position),
NULL, NULL,
gnt_closure_marshal_VOID__INT_INT,
G_TYPE_NONE, 2, G_TYPE_INT, G_TYPE_INT);
signals[SIG_SIZE_REQUEST] =
g_signal_new("size_request",
G_TYPE_FROM_CLASS(klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET(GntWidgetClass, size_request),
NULL, NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE, 0);
signals[SIG_SIZE_CHANGED] =
g_signal_new("size_changed",
G_TYPE_FROM_CLASS(klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET(GntWidgetClass, size_changed),
NULL, NULL,
gnt_closure_marshal_VOID__INT_INT,
G_TYPE_NONE, 2, G_TYPE_INT, G_TYPE_INT);
signals[SIG_CONFIRM_SIZE] =
g_signal_new("confirm_size",
G_TYPE_FROM_CLASS(klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET(GntWidgetClass, confirm_size),
NULL, NULL,
gnt_closure_marshal_BOOLEAN__INT_INT,
G_TYPE_BOOLEAN, 2, G_TYPE_INT, G_TYPE_INT);
signals[SIG_KEY_PRESSED] =
g_signal_new("key_pressed",
G_TYPE_FROM_CLASS(klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET(GntWidgetClass, key_pressed),
gnt_boolean_handled_accumulator, NULL,
gnt_closure_marshal_BOOLEAN__STRING,
G_TYPE_BOOLEAN, 1, G_TYPE_STRING);
signals[SIG_CLICKED] =
g_signal_new("clicked",
G_TYPE_FROM_CLASS(klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET(GntWidgetClass, clicked),
gnt_boolean_handled_accumulator, NULL,
gnt_closure_marshal_BOOLEAN__INT_INT_INT,
G_TYPE_BOOLEAN, 3, G_TYPE_INT, G_TYPE_INT, G_TYPE_INT);
signals[SIG_CONTEXT_MENU] =
g_signal_new("context-menu",
G_TYPE_FROM_CLASS(klass),
G_SIGNAL_RUN_LAST,
0,
gnt_boolean_handled_accumulator, NULL,
gnt_closure_marshal_BOOLEAN__VOID,
G_TYPE_BOOLEAN, 0);
/* This is relevant for all widgets */
gnt_bindable_class_register_action(GNT_BINDABLE_CLASS(klass), "context-menu", context_menu,
GNT_KEY_POPUP, NULL);
gnt_bindable_register_binding(GNT_BINDABLE_CLASS(klass), "context-menu", GNT_KEY_F11, NULL);
gnt_bindable_register_binding(GNT_BINDABLE_CLASS(klass), "context-menu", GNT_KEY_CTRL_X, NULL);
gnt_style_read_actions(G_OBJECT_CLASS_TYPE(klass), GNT_BINDABLE_CLASS(klass));
GNTDEBUG;
}
/******************************************************************************
* GntWidget API
*****************************************************************************/
GType
gnt_widget_get_gtype(void)
{
static GType type = 0;
if(type == 0) {
static const GTypeInfo info = {
sizeof(GntWidgetClass),
NULL, /* base_init */
NULL, /* base_finalize */
(GClassInitFunc)gnt_widget_class_init,
NULL,
NULL, /* class_data */
sizeof(GntWidget),
0, /* n_preallocs */
gnt_widget_init, /* instance_init */
NULL /* value_table */
};
type = g_type_register_static(GNT_TYPE_BINDABLE,
"GntWidget",
&info, G_TYPE_FLAG_ABSTRACT);
}
return type;
}
void gnt_widget_set_take_focus(GntWidget *widget, gboolean can)
{
if (can)
GNT_WIDGET_SET_FLAGS(widget, GNT_WIDGET_CAN_TAKE_FOCUS);
else
GNT_WIDGET_UNSET_FLAGS(widget, GNT_WIDGET_CAN_TAKE_FOCUS);
}
/**
* gnt_widget_destroy:
* @obj: The #GntWidget instance.
*
* Emits the "destroy" signal notifying all reference holders that they
* should release @obj.
*/
void
gnt_widget_destroy(GntWidget *obj)
{
g_return_if_fail(GNT_IS_WIDGET(obj));
if(!(GNT_WIDGET_FLAGS(obj) & GNT_WIDGET_DESTROYING)) {
GNT_WIDGET_SET_FLAGS(obj, GNT_WIDGET_DESTROYING);
gnt_widget_hide(obj);
delwin(obj->window);
g_object_run_dispose(G_OBJECT(obj));
}
GNTDEBUG;
}
void
gnt_widget_show(GntWidget *widget)
{
gnt_widget_draw(widget);
gnt_screen_occupy(widget);
}
void
gnt_widget_draw(GntWidget *widget)
{
/* Draw the widget */
if (GNT_WIDGET_IS_FLAG_SET(widget, GNT_WIDGET_DRAWING))
return;
GNT_WIDGET_SET_FLAGS(widget, GNT_WIDGET_DRAWING);
if (!(GNT_WIDGET_FLAGS(widget) & GNT_WIDGET_MAPPED)) {
gnt_widget_map(widget);
}
if (widget->window == NULL)
{
#if 0
int x, y, maxx, maxy, w, h;
int oldw, oldh;
gboolean shadow = TRUE;
if (!gnt_widget_has_shadow(widget))
shadow = FALSE;
x = widget->priv.x;
y = widget->priv.y;
w = oldw = widget->priv.width + shadow;
h = oldh = widget->priv.height + shadow;
getmaxyx(stdscr, maxy, maxx);
maxy -= 1; /* room for the taskbar */
x = MAX(0, x);
y = MAX(0, y);
if (x + w >= maxx)
x = MAX(0, maxx - w);
if (y + h >= maxy)
y = MAX(0, maxy - h);
w = MIN(w, maxx);
h = MIN(h, maxy);
widget->priv.x = x;
widget->priv.y = y;
if (w != oldw || h != oldh) {
widget->priv.width = w - shadow;
widget->priv.height = h - shadow;
g_signal_emit(widget, signals[SIG_SIZE_CHANGED], 0, oldw, oldh);
}
#else
widget->window = newpad(widget->priv.height + 20, widget->priv.width + 20); /* XXX: */
#endif
init_widget(widget);
}
g_signal_emit(widget, signals[SIG_DRAW], 0);
gnt_widget_queue_update(widget);
GNT_WIDGET_UNSET_FLAGS(widget, GNT_WIDGET_DRAWING);
}
gboolean
gnt_widget_key_pressed(GntWidget *widget, const char *keys)
{
gboolean ret;
if (!GNT_WIDGET_IS_FLAG_SET(widget, GNT_WIDGET_CAN_TAKE_FOCUS))
return FALSE;
if (!GNT_WIDGET_IS_FLAG_SET(widget, GNT_WIDGET_DISABLE_ACTIONS) &&
gnt_bindable_perform_action_key(GNT_BINDABLE(widget), keys))
return TRUE;
keys = gnt_bindable_remap_keys(GNT_BINDABLE(widget), keys);
g_signal_emit(widget, signals[SIG_KEY_PRESSED], 0, keys, &ret);
return ret;
}
gboolean
gnt_widget_clicked(GntWidget *widget, GntMouseEvent event, int x, int y)
{
gboolean ret;
g_signal_emit(widget, signals[SIG_CLICKED], 0, event, x, y, &ret);
if (!ret && event == GNT_RIGHT_MOUSE_DOWN)
ret = gnt_bindable_perform_action_named(GNT_BINDABLE(widget), "context-menu", NULL);
return ret;
}
void
gnt_widget_expose(GntWidget *widget, int x, int y, int width, int height)
{
g_signal_emit(widget, signals[SIG_EXPOSE], 0, x, y, width, height);
}
void
gnt_widget_hide(GntWidget *widget)
{
g_signal_emit(widget, signals[SIG_HIDE], 0);
wbkgdset(widget->window, '\0' | gnt_color_pair(GNT_COLOR_NORMAL));
#if 0
/* XXX: I have no clue why, but this seemed to be necessary. */
if (gnt_widget_has_shadow(widget))
mvwvline(widget->window, 1, widget->priv.width, ' ', widget->priv.height);
#endif
gnt_screen_release(widget);
GNT_WIDGET_SET_FLAGS(widget, GNT_WIDGET_INVISIBLE);
GNT_WIDGET_UNSET_FLAGS(widget, GNT_WIDGET_MAPPED);
}
void
gnt_widget_set_position(GntWidget *wid, int x, int y)
{
g_signal_emit(wid, signals[SIG_POSITION], 0, x, y);
/* XXX: Need to install properties for these and g_object_notify */
wid->priv.x = x;
wid->priv.y = y;
}
void
gnt_widget_get_position(GntWidget *wid, int *x, int *y)
{
if (x)
*x = wid->priv.x;
if (y)
*y = wid->priv.y;
}
void
gnt_widget_size_request(GntWidget *widget)
{
g_signal_emit(widget, signals[SIG_SIZE_REQUEST], 0);
}
void
gnt_widget_get_size(GntWidget *wid, int *width, int *height)
{
gboolean shadow = TRUE;
if (!gnt_widget_has_shadow(wid))
shadow = FALSE;
if (width)
*width = wid->priv.width + shadow;
if (height)
*height = wid->priv.height + shadow;
}
static void
init_widget(GntWidget *widget)
{
gboolean shadow = TRUE;
if (!gnt_widget_has_shadow(widget))
shadow = FALSE;
wbkgd(widget->window, gnt_color_pair(GNT_COLOR_NORMAL));
werase(widget->window);
if (!(GNT_WIDGET_FLAGS(widget) & GNT_WIDGET_NO_BORDER))
{
/* - This is ugly. */
/* - What's your point? */
mvwvline(widget->window, 0, 0, ACS_VLINE | gnt_color_pair(GNT_COLOR_NORMAL), widget->priv.height);
mvwvline(widget->window, 0, widget->priv.width - 1,
ACS_VLINE | gnt_color_pair(GNT_COLOR_NORMAL), widget->priv.height);
mvwhline(widget->window, widget->priv.height - 1, 0,
ACS_HLINE | gnt_color_pair(GNT_COLOR_NORMAL), widget->priv.width);
mvwhline(widget->window, 0, 0, ACS_HLINE | gnt_color_pair(GNT_COLOR_NORMAL), widget->priv.width);
mvwaddch(widget->window, 0, 0, ACS_ULCORNER | gnt_color_pair(GNT_COLOR_NORMAL));
mvwaddch(widget->window, 0, widget->priv.width - 1,
ACS_URCORNER | gnt_color_pair(GNT_COLOR_NORMAL));
mvwaddch(widget->window, widget->priv.height - 1, 0,
ACS_LLCORNER | gnt_color_pair(GNT_COLOR_NORMAL));
mvwaddch(widget->window, widget->priv.height - 1, widget->priv.width - 1,
ACS_LRCORNER | gnt_color_pair(GNT_COLOR_NORMAL));
}
if (shadow)
{
wbkgdset(widget->window, '\0' | gnt_color_pair(GNT_COLOR_SHADOW));
mvwvline(widget->window, 1, widget->priv.width, ' ', widget->priv.height);
mvwhline(widget->window, widget->priv.height, 1, ' ', widget->priv.width);
}
}
gboolean
gnt_widget_set_size(GntWidget *widget, int width, int height)
{
gboolean ret = TRUE;
if (gnt_widget_has_shadow(widget))
{
width--;
height--;
}
if (width <= 0)
width = widget->priv.width;
if (height <= 0)
height = widget->priv.height;
if (GNT_WIDGET_IS_FLAG_SET(widget, GNT_WIDGET_MAPPED))
{
ret = gnt_widget_confirm_size(widget, width, height);
}
if (ret)
{
gboolean shadow = TRUE;
int oldw, oldh;
if (!gnt_widget_has_shadow(widget))
shadow = FALSE;
oldw = widget->priv.width;
oldh = widget->priv.height;
widget->priv.width = width;
widget->priv.height = height;
if (width + shadow >= getmaxx(widget->window) || height + shadow >= getmaxy(widget->window)) {
delwin(widget->window);
widget->window = newpad(height + 20, width + 20);
}
g_signal_emit(widget, signals[SIG_SIZE_CHANGED], 0, oldw, oldh);
if (widget->window)
{
init_widget(widget);
}
if (GNT_WIDGET_IS_FLAG_SET(widget, GNT_WIDGET_MAPPED))
init_widget(widget);
else
GNT_WIDGET_SET_FLAGS(widget, GNT_WIDGET_MAPPED);
}
return ret;
}
gboolean
gnt_widget_set_focus(GntWidget *widget, gboolean set)
{
if (!(GNT_WIDGET_FLAGS(widget) & GNT_WIDGET_CAN_TAKE_FOCUS))
return FALSE;
if (set && !GNT_WIDGET_IS_FLAG_SET(widget, GNT_WIDGET_HAS_FOCUS))
{
GNT_WIDGET_SET_FLAGS(widget, GNT_WIDGET_HAS_FOCUS);
g_signal_emit(widget, signals[SIG_GIVE_FOCUS], 0);
}
else if (!set && GNT_WIDGET_IS_FLAG_SET(widget, GNT_WIDGET_HAS_FOCUS))
{
GNT_WIDGET_UNSET_FLAGS(widget, GNT_WIDGET_HAS_FOCUS);
g_signal_emit(widget, signals[SIG_LOST_FOCUS], 0);
}
else
return FALSE;
return TRUE;
}
void gnt_widget_set_name(GntWidget *widget, const char *name)
{
g_free(widget->priv.name);
widget->priv.name = g_strdup(name);
}
const char *gnt_widget_get_name(GntWidget *widget)
{
return widget->priv.name;
}
void gnt_widget_activate(GntWidget *widget)
{
g_signal_emit(widget, signals[SIG_ACTIVATE], 0);
}
static gboolean
update_queue_callback(gpointer data)
{
GntWidget *widget = GNT_WIDGET(data);
if (!g_object_get_data(G_OBJECT(widget), "gnt:queue_update"))
return FALSE;
if (GNT_WIDGET_IS_FLAG_SET(widget, GNT_WIDGET_MAPPED))
gnt_screen_update(widget);
g_object_set_data(G_OBJECT(widget), "gnt:queue_update", NULL);
return FALSE;
}
void gnt_widget_queue_update(GntWidget *widget)
{
if (widget->window == NULL)
return;
while (widget->parent)
widget = widget->parent;
if (!g_object_get_data(G_OBJECT(widget), "gnt:queue_update"))
{
int id = g_timeout_add(0, update_queue_callback, widget);
g_object_set_data_full(G_OBJECT(widget), "gnt:queue_update", GINT_TO_POINTER(id),
(GDestroyNotify)g_source_remove);
}
}
gboolean gnt_widget_confirm_size(GntWidget *widget, int width, int height)
{
gboolean ret = FALSE;
g_signal_emit(widget, signals[SIG_CONFIRM_SIZE], 0, width, height, &ret);
return ret;
}
void gnt_widget_set_visible(GntWidget *widget, gboolean set)
{
if (set)
GNT_WIDGET_UNSET_FLAGS(widget, GNT_WIDGET_INVISIBLE);
else
GNT_WIDGET_SET_FLAGS(widget, GNT_WIDGET_INVISIBLE);
}
gboolean gnt_widget_has_shadow(GntWidget *widget)
{
return (!GNT_WIDGET_IS_FLAG_SET(widget, GNT_WIDGET_NO_SHADOW) &&
gnt_style_get_bool(GNT_STYLE_SHADOW, FALSE));
}