img-view.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。

			default:
				break;
			}
		x *= 3;
		y *= 3;
		}

	if (x != 0 || y!= 0)
		{
		keyboard_scroll_calc(&x, &y, event);
		image_scroll(imd, x, y);
		}

	return stop_signal;
}

/*
 *-----------------------------------------------------------------------------
 * view window main routines
 *-----------------------------------------------------------------------------
 */ 

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

	switch (button)
		{
		case 1:
			view_step_next(vw);
			break;
		case 2:
			view_step_prev(vw);
			break;
		case 3:
			menu = view_popup_menu(vw);
			gtk_menu_popup (GTK_MENU(menu), NULL, NULL, NULL, NULL, 3, time);
			break;
		default:
			break;
		}
}

static void scroll_cb(ImageWindow *imd, GdkScrollDirection direction, guint32 time,
		      gdouble x, gdouble y, guint state, gpointer data)
{
	ViewWindow *vw = 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:
				view_step_prev(vw);
				break;
			case GDK_SCROLL_DOWN:
				view_step_next(vw);
				break;
			default:
				break;
			}
		}
}

static void view_image_set_buttons(ViewWindow *vw, ImageWindow *imd)
{
	image_set_button_func(imd, button_cb, vw);
	image_set_scroll_func(imd, scroll_cb, vw);
}

static void view_fullscreen_stop_func(FullScreenData *fs, gpointer data)
{
	ViewWindow *vw = data;

	vw->fs = NULL;

	if (vw->ss) vw->ss->imd = vw->imd;
}

static void view_fullscreen_toggle(ViewWindow *vw, gint force_off)
{
	if (force_off && !vw->fs) return;

	if (vw->fs)
		{
		fullscreen_stop(vw->fs);

		if (vw->overlay_id != -1) vw->overlay_id = image_overlay_info_enable(vw->imd);
		}
	else
		{
		vw->fs = fullscreen_start(vw->window, vw->imd, view_fullscreen_stop_func, vw);

		view_image_set_buttons(vw, vw->fs->imd);
		g_signal_connect(G_OBJECT(vw->fs->window), "key_press_event",
				 G_CALLBACK(view_window_key_press_cb), vw);

		if (vw->ss) vw->ss->imd = vw->fs->imd;

		if (vw->overlay_id != -1)
			{
			image_overlay_info_disable(vw->imd, vw->overlay_id);
			vw->overlay_id = image_overlay_info_enable(vw->fs->imd);
			}
		}
}

static void view_overlay_toggle(ViewWindow *vw)
{
	ImageWindow *imd;

	imd = view_window_active_image(vw);

	if (vw->overlay_id == -1)
		{
		vw->overlay_id = image_overlay_info_enable(imd);
		}
	else
		{
		image_overlay_info_disable(imd, vw->overlay_id);
		vw->overlay_id = -1;
		}
}

static void view_slideshow_next(ViewWindow *vw)
{
	if (vw->ss) slideshow_next(vw->ss);
}

static void view_slideshow_prev(ViewWindow *vw)
{
	if (vw->ss) slideshow_prev(vw->ss);
}

static void view_slideshow_stop_func(SlideShowData *fs, gpointer data)
{
	ViewWindow *vw = data;

	vw->ss = NULL;
}

static void view_slideshow_start(ViewWindow *vw)
{
	if (!vw->ss)
		{
		CollectionData *cd;
		CollectInfo *info;

		if (vw->list)
			{
			vw->ss = slideshow_start_from_path_list(view_window_active_image(vw),
								path_list_copy(vw->list),
								view_slideshow_stop_func, vw);
			vw->list_pointer = NULL;
			return;
			}

		cd = image_get_collection(view_window_active_image(vw), &info);
		if (cd && info)
			{
			vw->ss = slideshow_start_from_collection(view_window_active_image(vw), cd,
								 view_slideshow_stop_func, vw, info);
			}
		}
}

static void view_slideshow_stop(ViewWindow *vw)
{
	if (vw->ss) slideshow_free(vw->ss);
}

static void view_window_close(ViewWindow *vw)
{
	view_window_list = g_list_remove(view_window_list, vw);

	view_slideshow_stop(vw);
	view_fullscreen_toggle(vw, TRUE);
	gtk_widget_destroy(vw->window);
	path_list_free(vw->list);
	g_free(vw);
}

static gint view_window_delete_cb(GtkWidget *w, GdkEventAny *event, gpointer data)
{
	ViewWindow *vw = data;

	view_window_close(vw);
	return TRUE;
}

static ViewWindow *real_view_window_new(const gchar *path, GList *list, CollectionData *cd, CollectInfo *info)
{
	ViewWindow *vw;
	GtkAllocation req_size;
	GdkGeometry geometry;
	gint w, h;

	if (!path && !list && (!cd || !info)) return NULL;

	vw = g_new0(ViewWindow, 1);
	vw->fs = NULL;
	vw->ss = NULL;
	vw->list = NULL;
	vw->list_pointer = NULL;

	vw->overlay_id = -1;

	vw->window = gtk_window_new(GTK_WINDOW_TOPLEVEL);

	geometry.min_width = 8;
	geometry.min_height = 8;
	gtk_window_set_geometry_hints(GTK_WINDOW(vw->window), NULL, &geometry, GDK_HINT_MIN_SIZE);

	gtk_window_set_resizable(GTK_WINDOW(vw->window), TRUE);
	gtk_window_set_title (GTK_WINDOW(vw->window), "GQview");
        gtk_window_set_wmclass(GTK_WINDOW(vw->window), "view", "GQview");
        gtk_container_set_border_width(GTK_CONTAINER(vw->window), 0);

	window_set_icon(vw->window, (const gchar **)view_xpm, NULL);

	vw->imd = image_new(FALSE);

	if (black_window_background) image_background_set_black(vw->imd, TRUE);

	image_attach_window(vw->imd, vw->window, NULL, "GQview", TRUE);

	image_auto_refresh(vw->imd, 0);
	image_top_window_set_sync(vw->imd, TRUE);

	gtk_container_add(GTK_CONTAINER(vw->window), vw->imd->widget);
	gtk_widget_show(vw->imd->widget);

	view_window_dnd_init(vw);

	view_image_set_buttons(vw, vw->imd);

	g_signal_connect(G_OBJECT(vw->window), "delete_event",
			 G_CALLBACK(view_window_delete_cb), vw);
	g_signal_connect(G_OBJECT(vw->window), "key_press_event",
			 G_CALLBACK(view_window_key_press_cb), vw);
	if (cd && info)
		{
		image_change_from_collection(vw->imd, cd, info, image_zoom_get_default(NULL, zoom_mode));
		if (enable_read_ahead)
			{
			CollectInfo * r_info = collection_next_by_info(cd, info);
			if (!r_info) r_info = collection_prev_by_info(cd, info);
			if (r_info) image_prebuffer_set(vw->imd, r_info->path);
			}
		}
	else if (list)
		{
		view_window_set_list(vw, list);
		vw->list_pointer = vw->list;
		image_change_path(vw->imd, (gchar *)vw->list->data, image_zoom_get_default(NULL, zoom_mode));

		if (enable_read_ahead)
			{
			GList *work = vw->list->next;
			if (work) image_prebuffer_set(vw->imd, (gchar *)work->data);
			}
		}
	else
		{
		image_change_path(vw->imd, path, image_zoom_get_default(NULL, zoom_mode));
		}

	if (image_zoom_get(vw->imd) == 0.0)
		{
		pixbuf_renderer_get_image_size(PIXBUF_RENDERER(vw->imd->pr), &w, &h);
		}
	else
		{
		pixbuf_renderer_get_scaled_size(PIXBUF_RENDERER(vw->imd->pr), &w, &h);
		}
	if (limit_window_size)
		{
		gint mw = gdk_screen_width() * max_window_size / 100;
		gint mh = gdk_screen_height() * max_window_size / 100;

		if (w > mw) w = mw;
		if (h > mh) h = mh;
		}

	gtk_window_set_default_size(GTK_WINDOW(vw->window), w, h);
	req_size.x = req_size.y = 0;
	req_size.width = w;
	req_size.height = h;
	gtk_widget_size_allocate(GTK_WIDGET(vw->window), &req_size);

	gtk_widget_set_size_request(vw->imd->pr, w, h);

	gtk_widget_show(vw->window);

	view_window_list = g_list_append(view_window_list, vw);

	return vw;
}

static void view_window_collection_unref_cb(GtkWidget *widget, gpointer data)
{
	CollectionData *cd = data;

	collection_unref(cd);
}

void view_window_new(const gchar *path)
{
	if (file_extension_match(path, ".gqv"))
		{
		ViewWindow *vw;
		CollectionData *cd;
		CollectInfo *info;

		cd = collection_new(path);
		if (collection_load(cd, path, FALSE))
			{
			info = collection_get_first(cd);
			}
		else
			{
			collection_unref(cd);
			cd = NULL;
			info = NULL;
			}
		vw = real_view_window_new(NULL, NULL, cd, info);
		if (vw && cd)
			{
			g_signal_connect(G_OBJECT(vw->window), "destroy",
					 G_CALLBACK(view_window_collection_unref_cb), cd);
			}
		}
	else if (isdir(path))
		{
		GList *list = NULL;

		if (path_list(path, &list, NULL))
			{
			list = path_list_sort(list);
			list = path_list_filter(list, FALSE);
			}
		real_view_window_new(NULL, list, NULL, NULL);
		path_list_free(list);
		}
	else
		{
		real_view_window_new(path, NULL, NULL, NULL);
		}
}

void view_window_new_from_list(GList *list)
{
	real_view_window_new(NULL, list, NULL, NULL);
}

void view_window_new_from_collection(CollectionData *cd, CollectInfo *info)
{
	real_view_window_new(NULL, NULL, cd, info);
}

/*
 *-----------------------------------------------------------------------------
 * public
 *-----------------------------------------------------------------------------
 */

void view_window_colors_update(void)
{
	GList *work;

	work = view_window_list;
	while (work)
		{
		ViewWindow *vw = work->data;
		work = work->next;

		image_background_set_black(vw->imd, black_window_background);
		}
}

gint view_window_find_image(ImageWindow *imd, gint *index, gint *total)
{
	GList *work;

	work = view_window_list;
	while (work)
		{
		ViewWindow *vw = work->data;
		work = work->next;

		if (vw->imd == imd ||
		    (vw->fs && vw->fs->imd == imd))
			{
			if (vw->ss)
				{
				gint n;
				n = g_list_length(vw->ss->list_done);
				if (index) *index = n - 1;
				if (total) *total = n + g_list_length(vw->ss->list);
				}
			else
				{
				if (index) *index = g_list_position(vw->list, vw->list_pointer);
				if (total) *total = g_list_length(vw->list);
				}
			return TRUE;
			}
		}

	return FALSE;
}

/*
 *-----------------------------------------------------------------------------
 * view window menu routines and callbacks
 *-----------------------------------------------------------------------------
 */ 

static void view_new_window_cb(GtkWidget *widget, gpointer data)
{
	ViewWindow *vw = data;
	CollectionData *cd;
	CollectInfo *info;

	cd = image_get_collection(vw->imd, &info);

	if (cd && info)
		{
		view_window_new_from_collection(cd, info);
		}
	else
		{
		view_window_new(image_get_path(vw->imd));
		}
}

static void view_edit_cb(GtkWidget *widget, gpointer data)
{
	ViewWindow *vw;
	ImageWindow *imd;
	gint n;

	vw = submenu_item_get_data(widget);
	n = GPOINTER_TO_INT(data);
	if (!vw) return;

	if (!editor_window_flag_set(n))
		{
		view_fullscreen_toggle(vw, TRUE);
		}

	imd = view_window_active_image(vw);
	start_editor_from_file(n, image_get_path(imd));
}

static void view_alter_cb(GtkWidget *widget, gpointer data)
{
	ViewWindow *vw;
	AlterType type;

	vw = submenu_item_get_data(widget);
	type = GPOINTER_TO_INT(data);

	if (!vw) return;
	image_alter(vw->imd, type);
}

static void view_info_cb(GtkWidget *widget, gpointer data)
{
	ViewWindow *vw = data;
	ImageWindow *imd;

	imd = view_window_active_image(vw);
	info_window_new(image_get_path(imd), NULL);
}

static void view_wallpaper_cb(GtkWidget *widget, gpointer data)
{
	ViewWindow *vw = data;
	ImageWindow *imd;

	imd = view_window_active_image(vw);
	image_to_root_window(imd, (image_zoom_get(imd) == 0.0));
}

static void view_zoom_in_cb(GtkWidget *widget, gpointer data)
{
	ViewWindow *vw = data;

	image_zoom_adjust(view_window_active_image(vw), get_zoom_increment());
}

static void view_zoom_out_cb(GtkWidget *widget, gpointer data)
{
	ViewWindow *vw = data;

	image_zoom_adjust(view_window_active_image(vw), -get_zoom_increment());
}

static void view_zoom_1_1_cb(GtkWidget *widget, gpointer data)
{
	ViewWindow *vw = data;

	image_zoom_set(view_window_active_image(vw), 1.0);
}

static void view_zoom_fit_cb(GtkWidget *widget, gpointer data)
{
	ViewWindow *vw = data;

	image_zoom_set(view_window_active_image(vw), 0.0);
}

static void view_copy_cb(GtkWidget *widget, gpointer data)
{
	ViewWindow *vw = data;
	ImageWindow *imd;