gntwidget.c

Linux下的多协议即时通讯程序源代码

	/* 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_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);
	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' | 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, 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 | COLOR_PAIR(GNT_COLOR_NORMAL), widget->priv.height);
		mvwvline(widget->window, 0, widget->priv.width - 1,
				ACS_VLINE | COLOR_PAIR(GNT_COLOR_NORMAL), widget->priv.height);
		mvwhline(widget->window, widget->priv.height - 1, 0,
				ACS_HLINE | COLOR_PAIR(GNT_COLOR_NORMAL), widget->priv.width);
		mvwhline(widget->window, 0, 0, ACS_HLINE | COLOR_PAIR(GNT_COLOR_NORMAL), widget->priv.width);
		mvwaddch(widget->window, 0, 0, ACS_ULCORNER | COLOR_PAIR(GNT_COLOR_NORMAL));
		mvwaddch(widget->window, 0, widget->priv.width - 1,
				ACS_URCORNER | COLOR_PAIR(GNT_COLOR_NORMAL));
		mvwaddch(widget->window, widget->priv.height - 1, 0,
				ACS_LLCORNER | COLOR_PAIR(GNT_COLOR_NORMAL));
		mvwaddch(widget->window, widget->priv.height - 1, widget->priv.width - 1,
				ACS_LRCORNER | COLOR_PAIR(GNT_COLOR_NORMAL));
	}

	if (shadow)
	{
		wbkgdset(widget->window, '\0' | 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_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));
}