layout_image.c

Gqview,Linux下基于GTK+库写成的轻量级而能丰富的图像浏览程序。

 * misc
 *----------------------------------------------------------------------------
 */

void layout_image_to_root(LayoutWindow *lw)
{
	image_to_root_window(lw->image, (image_zoom_get(lw->image) == 0));
}

/*
 *----------------------------------------------------------------------------
 * manipulation + accessors
 *----------------------------------------------------------------------------
 */

void layout_image_scroll(LayoutWindow *lw, gint x, gint y)
{
	if (!layout_valid(&lw)) return;

	image_scroll(lw->image, x, y);
}

void layout_image_zoom_adjust(LayoutWindow *lw, gdouble increment)
{
	if (!layout_valid(&lw)) return;

	image_zoom_adjust(lw->image, increment);
}

void layout_image_zoom_set(LayoutWindow *lw, gdouble zoom)
{
	if (!layout_valid(&lw)) return;

	image_zoom_set(lw->image, zoom);
}

void layout_image_zoom_set_fill_geometry(LayoutWindow *lw, gint vertical)
{
	if (!layout_valid(&lw)) return;

	image_zoom_set_fill_geometry(lw->image, vertical);
}

void layout_image_alter(LayoutWindow *lw, AlterType type)
{
	if (!layout_valid(&lw)) return;

	image_alter(lw->image, type);
}

const gchar *layout_image_get_path(LayoutWindow *lw)
{
	if (!layout_valid(&lw)) return NULL;

	return image_get_path(lw->image);
}

const gchar *layout_image_get_name(LayoutWindow *lw)
{
	if (!layout_valid(&lw)) return NULL;

	return image_get_name(lw->image);
}

CollectionData *layout_image_get_collection(LayoutWindow *lw, CollectInfo **info)
{
	if (!layout_valid(&lw)) return NULL;

	return image_get_collection(lw->image, info);
}

gint layout_image_get_index(LayoutWindow *lw)
{
	return layout_list_get_index(lw, image_get_path(lw->image));
}

/*
 *----------------------------------------------------------------------------
 * image changers
 *----------------------------------------------------------------------------
 */

void layout_image_set_path(LayoutWindow *lw, const gchar *path)
{
	if (!layout_valid(&lw)) return;

	image_change_path(lw->image, path, image_zoom_get_default(lw->image, zoom_mode));

	layout_list_sync_path(lw, path);
	layout_image_slideshow_continue_check(lw);
	layout_bars_new_image(lw);
}

void layout_image_set_with_ahead(LayoutWindow *lw, const gchar *path, const gchar *read_ahead_path)
{
	if (!layout_valid(&lw)) return;

	if (path)
		{
		const gchar *old_path;

		old_path = layout_image_get_path(lw);
		if (old_path && strcmp(path, old_path) == 0) return;
		}

	layout_image_set_path(lw, path);
	if (enable_read_ahead) image_prebuffer_set(lw->image, read_ahead_path);
}

void layout_image_set_index(LayoutWindow *lw, gint index)
{
	const gchar *path;
	const gchar *read_ahead_path;
	gint old;

	if (!layout_valid(&lw)) return;

	old = layout_list_get_index(lw, layout_image_get_path(lw));
	path = layout_list_get_path(lw, index);

	if (old > index)
		{
		read_ahead_path = layout_list_get_path(lw, index - 1);
		}
	else
		{
		read_ahead_path = layout_list_get_path(lw, index + 1);
		}

	layout_image_set_with_ahead(lw, path, read_ahead_path);
}

static void layout_image_set_collection_real(LayoutWindow *lw, CollectionData *cd, CollectInfo *info, gint forward)
{
	if (!layout_valid(&lw)) return;

	image_change_from_collection(lw->image, cd, info, image_zoom_get_default(lw->image, zoom_mode));
	if (enable_read_ahead)
		{
		CollectInfo *r_info;
		if (forward)
			{
			r_info = collection_next_by_info(cd, info);
			if (!r_info) r_info = collection_prev_by_info(cd, info);
			}
		else
			{
			r_info = collection_prev_by_info(cd, info);
			if (!r_info) r_info = collection_next_by_info(cd, info);
			}
		if (r_info) image_prebuffer_set(lw->image, r_info->path);
		}

	layout_image_slideshow_continue_check(lw);
	layout_bars_new_image(lw);
}

void layout_image_set_collection(LayoutWindow *lw, CollectionData *cd, CollectInfo *info)
{
	layout_image_set_collection_real(lw, cd, info, TRUE);
	layout_list_sync_path(lw, layout_image_get_path(lw));
}

void layout_image_refresh(LayoutWindow *lw)
{
	if (!layout_valid(&lw)) return;

	image_reload(lw->image);
}

/*
 *----------------------------------------------------------------------------
 * list walkers
 *----------------------------------------------------------------------------
 */

void layout_image_next(LayoutWindow *lw)
{
	gint current;
	CollectionData *cd;
	CollectInfo *info;

	if (!layout_valid(&lw)) return;

	if (layout_image_slideshow_active(lw))
		{
		layout_image_slideshow_next(lw);
		return;
		}

	cd = image_get_collection(lw->image, &info);

	if (cd && info)
		{
		info = collection_next_by_info(cd, info);
		if (info) layout_image_set_collection_real(lw, cd, info, TRUE);
		return;
		}

	current = layout_image_get_index(lw);

	if (current >= 0)
		{
		if (current < layout_list_count(lw, NULL) - 1)
			{
			layout_image_set_index(lw, current + 1);
			}
		}
	else
		{
		layout_image_set_index(lw, 0);
		}
}

void layout_image_prev(LayoutWindow *lw)
{
	gint current;
	CollectionData *cd;
	CollectInfo *info;

	if (!layout_valid(&lw)) return;

	if (layout_image_slideshow_active(lw))
		{
		layout_image_slideshow_prev(lw);
		return;
		}

	cd = image_get_collection(lw->image, &info);

	if (cd && info)
		{
		info = collection_prev_by_info(cd, info);
		if (info) layout_image_set_collection_real(lw, cd, info, FALSE);
		return;
		}

	current = layout_image_get_index(lw);

	if (current >= 0)
		{
		if (current > 0)
			{
			layout_image_set_index(lw, current - 1);
			}
		}
	else
		{
		layout_image_set_index(lw, layout_list_count(lw, NULL) - 1);
		}
}

void layout_image_first(LayoutWindow *lw)
{
	gint current;
	CollectionData *cd;
	CollectInfo *info;

	if (!layout_valid(&lw)) return;

	cd = image_get_collection(lw->image, &info);

	if (cd && info)
		{
		CollectInfo *new;
		new = collection_get_first(cd);
		if (new != info) layout_image_set_collection_real(lw, cd, new, TRUE);
		return;
		}

	current = layout_image_get_index(lw);
	if (current != 0 && layout_list_count(lw, NULL) > 0)
		{
		layout_image_set_index(lw, 0);
		}
}

void layout_image_last(LayoutWindow *lw)
{
	gint current;
	gint count;
	CollectionData *cd;
	CollectInfo *info;

	if (!layout_valid(&lw)) return;

	cd = image_get_collection(lw->image, &info);

	if (cd && info)
		{
		CollectInfo *new;
		new = collection_get_last(cd);
		if (new != info) layout_image_set_collection_real(lw, cd, new, FALSE);
		return;
		}

	current = layout_image_get_index(lw);
	count = layout_list_count(lw, NULL);
	if (current != count - 1 && count > 0)
		{
		layout_image_set_index(lw, count - 1);
		}
}

/*
 *----------------------------------------------------------------------------
 * mouse callbacks
 *----------------------------------------------------------------------------
 */

static void layout_image_button_cb(ImageWindow *imd, gint button, guint32 time,
				   gdouble x, gdouble y, guint state, gpointer data)
{
	LayoutWindow *lw = data;
	GtkWidget *menu;

	switch (button)
		{
		case 1:
			layout_image_next(lw);
			break;
		case 2:
			layout_image_prev(lw);
			break;
		case 3:
			menu = layout_image_pop_menu(lw);
			if (imd == lw->image)
				{
				g_object_set_data(G_OBJECT(menu), "click_parent", imd->widget);
				}
			gtk_menu_popup(GTK_MENU(menu), NULL, NULL, NULL, NULL, 3, time);
			break;
		default:
			break;
		}
}

static void layout_image_scroll_cb(ImageWindow *imd, GdkScrollDirection direction, guint32 time,
				   gdouble x, gdouble y, guint state, gpointer data)
{
	LayoutWindow *lw = data;

	if (state & GDK_CONTROL_MASK)
		{
		switch (direction)
			{
			case GDK_SCROLL_UP:
				image_zoom_adjust_at_point(imd, get_zoom_increment(), x, y);
				break;
			case GDK_SCROLL_DOWN:
				image_zoom_adjust_at_point(imd, -get_zoom_increment(), x, y);
				break;
			default:
				break;
			}
		}
	else if ( (state & GDK_SHIFT_MASK) != (mousewheel_scrolls))
		{
		switch (direction)
			{
			case GDK_SCROLL_UP:
				image_scroll(imd, 0, -MOUSEWHEEL_SCROLL_SIZE);
				break;
			case GDK_SCROLL_DOWN:
				image_scroll(imd, 0, MOUSEWHEEL_SCROLL_SIZE);
				break;
			case GDK_SCROLL_LEFT:
				image_scroll(imd, -MOUSEWHEEL_SCROLL_SIZE, 0);
				break;
			case GDK_SCROLL_RIGHT:
				image_scroll(imd, MOUSEWHEEL_SCROLL_SIZE, 0);
				break;
			default:
				break;
			}
		}
	else
		{
		switch (direction)
			{
			case GDK_SCROLL_UP:
				layout_image_prev(lw);
				break;
			case GDK_SCROLL_DOWN:
				layout_image_next(lw);
				break;
			default:
				break;
			}
		}
}

static void layout_image_set_buttons(LayoutWindow *lw)
{
	image_set_button_func(lw->image, layout_image_button_cb, lw);
	image_set_scroll_func(lw->image, layout_image_scroll_cb, lw);
}

/*
 *----------------------------------------------------------------------------
 * setup
 *----------------------------------------------------------------------------
 */

static void layout_image_update_cb(ImageWindow *imd, gpointer data)
{
	LayoutWindow *lw = data;
	layout_status_update_image(lw);
}

GtkWidget *layout_image_new(LayoutWindow *lw, const gchar *path)
{
	if (!lw->image) 
		{
		lw->image = image_new( (!lw->tools_float && !lw->tools_hidden) );
		if (black_window_background) image_background_set_black(lw->image, TRUE);
		image_set_update_func(lw->image, layout_image_update_cb, lw);
		layout_image_set_buttons(lw);
		layout_image_dnd_init(lw);

		image_attach_window(lw->image, lw->window, NULL, "GQview", FALSE);

		image_auto_refresh(lw->image, 0);
		}

	return lw->image->widget;
}

/*
 *-----------------------------------------------------------------------------
 * maintenance (for rename, move, remove)
 *-----------------------------------------------------------------------------
 */

void layout_image_maint_renamed(LayoutWindow *lw, const gchar *source, const gchar *dest)
{
	const gchar *img_path;

	img_path = layout_image_get_path(lw);
	if (img_path && strcmp(img_path, source) == 0)
		{
		image_set_path(lw->image, dest);
		layout_bars_maint_renamed(lw);
		}
}

void layout_image_maint_removed(LayoutWindow *lw, const gchar *path)
{
	const gchar *img_path;

	img_path = layout_image_get_path(lw);
	if (img_path && strcmp(img_path, path) == 0)
		{
		CollectionData *cd;
		CollectInfo *info;

		cd = image_get_collection(lw->image, &info);
		if (cd && info)
			{
			CollectInfo *new;

			new = collection_next_by_info(cd, info);
			if (!new) new = collection_prev_by_info(cd, info);

			if (new)
				{
				layout_image_set_collection(lw, cd, new);
				return;
				}
			}

		layout_image_set_path(lw, NULL);
		}
}

void layout_image_maint_moved(LayoutWindow *lw, const gchar *source, const gchar *dest)
{
	layout_image_maint_renamed(lw, source, dest);
}