gntwidget.c

Linux下的多协议即时通讯程序源代码

/* Stuff brutally ripped from Gflib */

#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);

	if(!(GNT_WIDGET_FLAGS(self) & GNT_WIDGET_DESTROYING)) {
		GNT_WIDGET_SET_FLAGS(self, GNT_WIDGET_DESTROYING);

		g_signal_emit(self, signals[SIG_DESTROY], 0);

		GNT_WIDGET_UNSET_FLAGS(self, GNT_WIDGET_DESTROYING);
	}

	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_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));

	gnt_widget_hide(obj);
	delwin(obj->window);
	if(!(GNT_WIDGET_FLAGS(obj) & GNT_WIDGET_DESTROYING))
		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)
{