ui_misc.c

来自「Gqview,Linux下基于GTK+库写成的轻量级而能丰富的图像浏览程序。」· C语言 代码 · 共 1,608 行 · 第 1/3 页

	g_object_set_data(G_OBJECT(ds->box), DATE_SELECION_KEY, ds);

	return ds->box;
}
                                                                                                                        
void date_selection_set(GtkWidget *widget, gint day, gint month, gint year)
{
	DateSelection *ds;

	ds = g_object_get_data(G_OBJECT(widget), DATE_SELECION_KEY);
	if (!ds) return;

	gtk_spin_button_set_value(GTK_SPIN_BUTTON(ds->spin_d), (gdouble)day);
	gtk_spin_button_set_value(GTK_SPIN_BUTTON(ds->spin_m), (gdouble)month);
	gtk_spin_button_set_value(GTK_SPIN_BUTTON(ds->spin_y), (gdouble)year);
}


void date_selection_get(GtkWidget *widget, gint *day, gint *month, gint *year)
{
	DateSelection *ds;

	ds = g_object_get_data(G_OBJECT(widget), DATE_SELECION_KEY);
	if (!ds) return;

	if (day) *day = gtk_spin_button_get_value(GTK_SPIN_BUTTON(ds->spin_d));
	if (month) *month = gtk_spin_button_get_value(GTK_SPIN_BUTTON(ds->spin_m));
	if (year) *year = gtk_spin_button_get_value(GTK_SPIN_BUTTON(ds->spin_y));
}
                                                                                                                        
void date_selection_time_set(GtkWidget *widget, time_t t)
{
	struct tm *lt;

	lt = localtime(&t);
	if (!lt) return;

	date_selection_set(widget, lt->tm_mday, lt->tm_mon + 1, lt->tm_year + 1900);
}

time_t date_selection_time_get(GtkWidget *widget)
{
	struct tm lt;
	gint day = 0;
	gint month = 0;
	gint year = 0;

	date_selection_get(widget, &day, &month ,&year);

	lt.tm_sec = 0;
	lt.tm_min = 0;
	lt.tm_hour = 0;
	lt.tm_mday = day;
	lt.tm_mon = month - 1;
	lt.tm_year = year - 1900;
	lt.tm_isdst = 0;

	return mktime(&lt);
}


/*
 *-----------------------------------------------------------------------------
 * Sizer, without using a GtkPaned
 *-----------------------------------------------------------------------------
 */

#define SIZER_DATA_KEY "sizer_data"

typedef struct _SizerData SizerData;
struct _SizerData
{
	GtkWidget *sizer;
	GtkWidget *parent;
	GtkWidget *bounding_widget;
	SizerPositionType position;

	gint hsize_min;
	gint hsize_max;
	gint vsize_min;
	gint vsize_max;

	gint in_drag;
	gint press_x;
	gint press_y;
	gint press_width;
	gint press_height;

	gint handle_prelit;
};


static gint sizer_default_handle_size(void)
{
	gint handle_size = 5;
	GtkWidget *paned;
	GtkStyle *style;

	paned = gtk_hpaned_new();

	style = gtk_rc_get_style(paned);
	gtk_widget_set_style(paned, style);
	gtk_widget_style_get(paned, "handle_size", &handle_size, NULL);

	gtk_widget_destroy(paned);

	return handle_size;
}

static gint sizer_motion_cb(GtkWidget *widget, GdkEventButton *bevent, gpointer data)
{
	SizerData *sd = data;
	gint x, y;
	gint w, h;

	if (!sd->in_drag) return FALSE;

	x = sd->press_x - bevent->x_root;
	y = sd->press_y - bevent->y_root;

	w = sd->press_width;
	h = sd->press_height;

	if (sd->position & SIZER_POS_LEFT)
		{
		w += x;
		}
	else if (sd->position & SIZER_POS_RIGHT)
		{
		w -= x;
		}

	if (sd->position & SIZER_POS_TOP)
		{
		h += y;
		}
	else if (sd->position & SIZER_POS_BOTTOM)
		{
		h -= y;
		}

	if (sd->hsize_min >= 0) w = MAX(w, sd->hsize_min);
	if (sd->vsize_min >= 0) h = MAX(h, sd->vsize_min);

	if (sd->bounding_widget)
		{
		w = CLAMP(w, sd->sizer->allocation.width, sd->bounding_widget->allocation.width);
		h = CLAMP(h, sd->sizer->allocation.height, sd->bounding_widget->allocation.height);
		}
	else
		{
		if (w < sd->sizer->allocation.width) w = sd->sizer->allocation.width;
		if (h < sd->sizer->allocation.height) h = sd->sizer->allocation.height;
		}

	if (sd->hsize_max >= 0) w = MIN(w, sd->hsize_max);
	if (sd->vsize_max >= 0) h = MIN(h, sd->vsize_max);

	if (w == sd->parent->allocation.width) w = -1;
	if (h == sd->parent->allocation.height) h = -1;

	if (w > 0 || h > 0) gtk_widget_set_size_request(sd->parent, w, h);

	return TRUE;
}

static gint sizer_press_cb(GtkWidget *widget, GdkEventButton *bevent, gpointer data)
{
	SizerData *sd = data;

	if (bevent->button != 1) return FALSE;

	sd->in_drag = TRUE;
	sd->press_x = bevent->x_root;
	sd->press_y = bevent->y_root;

	sd->press_width = sd->parent->allocation.width;
	sd->press_height = sd->parent->allocation.height;

	gdk_pointer_grab(sd->sizer->window, FALSE,
			 GDK_POINTER_MOTION_MASK | GDK_BUTTON_RELEASE_MASK,
			 NULL, NULL, bevent->time);
	gtk_grab_add(sd->sizer);

	return TRUE;
}

static gint sizer_release_cb(GtkWidget *widget, GdkEventButton *bevent, gpointer data)
{
	SizerData *sd = data;

	if (bevent->button != 1) return FALSE;

	if (gdk_pointer_is_grabbed() && GTK_WIDGET_HAS_GRAB(sd->sizer))
		{
		gtk_grab_remove(sd->sizer);
		gdk_pointer_ungrab(bevent->time);
		}

	sd->in_drag = FALSE;

	return TRUE;
}

static void sizer_set_prelight(SizerData *sd, gint prelit)
{
	sd->handle_prelit = prelit;
	gtk_widget_queue_draw_area(sd->sizer, 0, 0,
				   sd->sizer->allocation.width, sd->sizer->allocation.height);
}

static gint sizer_enter_cb(GtkWidget *widget, GdkEventCrossing *event, gpointer data)
{
	SizerData *sd = data;

	sizer_set_prelight(sd, TRUE);
	return TRUE;
}

static gint sizer_leave_cb(GtkWidget *widget, GdkEventCrossing *event, gpointer data)
{
	SizerData *sd = data;

	sizer_set_prelight(sd, FALSE);
	return TRUE;
}

static gint sizer_expose_cb(GtkWidget *widget, GdkEventExpose *event, gpointer data)
{
	SizerData *sd = data;
	GdkRectangle clip;
	GtkOrientation orientation;
	GtkStateType state;

	gdk_region_get_clipbox(event->region, &clip);

	if (sd->position & SIZER_POS_LEFT || sd->position & SIZER_POS_RIGHT)
		{
		orientation = GTK_ORIENTATION_VERTICAL;
		}
	else
		{
		orientation = GTK_ORIENTATION_HORIZONTAL;
		}

	if (sd->handle_prelit)
		{
		state = GTK_STATE_PRELIGHT;
		}
	else
		{
		state = widget->state;
		}

	gtk_paint_handle(widget->style, widget->window, state,
			 GTK_SHADOW_NONE, &clip, widget, "paned",
			 0, 0,
			 widget->allocation.width, widget->allocation.height,
			 orientation);

	return TRUE;
}

static void sizer_realize_cb(GtkWidget *widget, gpointer data)
{
	SizerData *sd = data;
	GdkCursorType n;

	n = 0;
	if (sd->position & SIZER_POS_TOP || sd->position & SIZER_POS_BOTTOM)
		{
		n = GDK_SB_V_DOUBLE_ARROW;
		}
	if (sd->position & SIZER_POS_LEFT || sd->position & SIZER_POS_RIGHT)
		{
		n = (n != 0) ? GDK_FLEUR : GDK_SB_H_DOUBLE_ARROW;
		}

	if (n != 0 && widget->window)
		{
		GdkCursor *cursor;
		cursor = gdk_cursor_new(n);
		gdk_window_set_cursor(widget->window, cursor);
		gdk_cursor_unref(cursor);
		}
}

static void sizer_destroy_cb(GtkWidget *widget, gpointer data)
{
	SizerData *sd = data;

	g_free(sd);
}

GtkWidget *sizer_new(GtkWidget *parent, GtkWidget *bounding_widget,
		     SizerPositionType position)
{
	SizerData *sd;
	gint handle_size;

	sd = g_new0(SizerData, 1);

	sd->sizer = gtk_event_box_new();
	sd->parent = parent;
	sd->bounding_widget = bounding_widget;
	sd->position = position;
	sd->hsize_min = -1;
	sd->hsize_max = -1;
	sd->vsize_min = -1;
	sd->vsize_max = -1;

	sd->in_drag = FALSE;
	sd->handle_prelit = FALSE;

	g_signal_connect(G_OBJECT(sd->sizer), "destroy",
			 G_CALLBACK(sizer_destroy_cb), sd);

	g_signal_connect(G_OBJECT(sd->sizer), "motion_notify_event",
			 G_CALLBACK(sizer_motion_cb), sd);
	g_signal_connect(G_OBJECT(sd->sizer), "button_press_event",
			 G_CALLBACK(sizer_press_cb), sd);
	g_signal_connect(G_OBJECT(sd->sizer), "button_release_event",
			 G_CALLBACK(sizer_release_cb), sd);

	g_signal_connect(G_OBJECT(sd->sizer), "enter_notify_event",
			 G_CALLBACK(sizer_enter_cb), sd);
	g_signal_connect(G_OBJECT(sd->sizer), "leave_notify_event",
			 G_CALLBACK(sizer_leave_cb), sd);

	gtk_widget_set_events(sd->sizer, GDK_POINTER_MOTION_MASK |
					 GDK_BUTTON_RELEASE_MASK | GDK_BUTTON_PRESS_MASK |
					 GDK_ENTER_NOTIFY_MASK | GDK_LEAVE_NOTIFY_MASK);

	g_signal_connect(sd->sizer, "realize",
			 G_CALLBACK(sizer_realize_cb), sd);
	g_signal_connect(sd->sizer, "expose_event",
			 G_CALLBACK(sizer_expose_cb), sd);

	handle_size = sizer_default_handle_size();

	gtk_widget_set_size_request(sd->sizer, handle_size, handle_size);
#if 0
	/* use this if you add a shadow border to the handle */
	gtk_widget_set_size_request(sd->sizer, handle_size + sd->sizer->style->xthickness * 2,
					       handle_size + sd->sizer->style->ythickness * 2);
#endif

	g_object_set_data(G_OBJECT(sd->sizer), SIZER_DATA_KEY,sd);

	return sd->sizer;
}

void sizer_set_limits(GtkWidget *sizer,
		      gint hsize_min, gint hsize_max,
		      gint vsize_min, gint vsize_max)
{
	SizerData *sd;

	sd = g_object_get_data(G_OBJECT(sizer), SIZER_DATA_KEY);
	if (!sd) return;

	sd->hsize_min = hsize_min;
	sd->hsize_max = hsize_max;
	sd->vsize_min = vsize_min;
	sd->vsize_max = vsize_max;
}


/*
 *-----------------------------------------------------------------------------
 * storing data in a history list with key,data pairs
 *-----------------------------------------------------------------------------
 */

#define PREF_LIST_MARKER_INT "[INT]:"
#define PREF_LIST_MARKER_DOUBLE "[DOUBLE]:"
#define PREF_LIST_MARKER_STRING "[STRING]:"

static GList *pref_list_find(const gchar *group, const gchar *token)
{
	GList *work;
	gint l;

	l = strlen(token);

	work = history_list_get_by_key(group);
	while (work)
		{
		const gchar *text = work->data;

		if (strncmp(text, token, l) == 0) return work;

		work = work->next;
		}

	return NULL;
}

static gint pref_list_get(const gchar *group, const gchar *key, const gchar *marker, const gchar **result)
{
	gchar *token;
	GList *work;
	gint ret;

	if (!group || !key || !marker)
		{
		*result = NULL;
		return FALSE;
		}

	token = g_strconcat(key, marker, NULL);

	work = pref_list_find(group, token);
	if (work)
		{
		*result = (const gchar *)work->data + strlen(token);
		if (strlen(*result) == 0) *result = NULL;
		ret = TRUE;
		}
	else
		{
		*result = NULL;
		ret = FALSE;
		}

	g_free(token);

	return ret; 
}

static void pref_list_set(const gchar *group, const gchar *key, const gchar *marker, const gchar *text)
{
	gchar *token;
	gchar *path;
	GList *work;

	if (!group || !key || !marker) return;

	token = g_strconcat(key, marker, NULL);
	path = g_strconcat(token, text, NULL);

	work = pref_list_find(group, token);
	if (work)
		{
		gchar *old_path = work->data;

		if (text)
			{
			work->data = path;
			path = NULL;

			g_free(old_path);
			}
		else
			{
			history_list_item_remove(group, old_path);
			}
		}
	else if (text)
		{
		history_list_add_to_key(group, path, 0);
		}

	g_free(path);
	g_free(token);
}

void pref_list_int_set(const gchar *group, const gchar *key, gint value)
{
	gchar *text;

	text = g_strdup_printf("%d", value);
	pref_list_set(group, key, PREF_LIST_MARKER_INT, text);
	g_free(text);
}

gint pref_list_int_get(const gchar *group, const gchar *key, gint *result)
{
	const gchar *text;

	if (!group || !key)
		{
		*result = 0;
		return FALSE;
		}

	if (pref_list_get(group, key, PREF_LIST_MARKER_INT, &text) && text)
		{
		*result = (gint)strtol(text, NULL, 10);
		return TRUE;
		}

	*result = 0;
	return FALSE;
}

void pref_list_double_set(const gchar *group, const gchar *key, gdouble value)
{
	gchar text[G_ASCII_DTOSTR_BUF_SIZE];

	g_ascii_dtostr(text, sizeof(text), value);
	pref_list_set(group, key, PREF_LIST_MARKER_DOUBLE, text);
}

gint pref_list_double_get(const gchar *group, const gchar *key, gdouble *result)
{
	const gchar *text;

	if (!group || !key)
		{
		*result = 0;
		return FALSE;
		}

	if (pref_list_get(group, key, PREF_LIST_MARKER_DOUBLE, &text) && text)
		{
		*result = g_ascii_strtod(text, NULL);
		return TRUE;
		}

	*result = 0;
	return FALSE;
}

void pref_list_string_set(const gchar *group, const gchar *key, const gchar *value)
{
	pref_list_set(group, key, PREF_LIST_MARKER_STRING, value);
}

gint pref_list_string_get(const gchar *group, const gchar *key, const gchar **result)
{
	return pref_list_get(group, key, PREF_LIST_MARKER_STRING, result);
}