static void
compute_offset (GObject *object,
GimpAlignmentType alignment)
{
gint object_offset_x = 0;
gint object_offset_y = 0;
gint object_height = 0;
gint object_width = 0;
gint offset = 0;
if (GIMP_IS_IMAGE (object))
{
GimpImage *image = GIMP_IMAGE (object);
object_offset_x = 0;
object_offset_y = 0;
object_height = gimp_image_get_height (image);
object_width = gimp_image_get_width (image);
}
else if (GIMP_IS_CHANNEL (object))
{
/* for channels, we use the bounds of the visible area, not
the layer bounds. This includes the selection channel */
GimpChannel *channel = GIMP_CHANNEL (object);
if (gimp_channel_is_empty (channel))
{
/* fall back on using the offsets instead */
GimpItem *item = GIMP_ITEM (object);
gimp_item_get_offset (item, &object_offset_x, &object_offset_y);
object_width = gimp_item_get_width (item);
object_height = gimp_item_get_height (item);
}
else
{
gint x1, x2, y1, y2;
gimp_channel_bounds (channel, &x1, &y1, &x2, &y2);
object_offset_x = x1;
object_offset_y = y1;
object_width = x2 - x1;
object_height = y2 - y1;
}
}
else if (GIMP_IS_ITEM (object))
{
GimpItem *item = GIMP_ITEM (object);
if (GIMP_IS_VECTORS (object))
{
gdouble x1_f, y1_f, x2_f, y2_f;
gimp_vectors_bounds (GIMP_VECTORS (item),
&x1_f, &y1_f,
&x2_f, &y2_f);
object_offset_x = ROUND (x1_f);
object_offset_y = ROUND (y1_f);
object_height = ROUND (y2_f - y1_f);
object_width = ROUND (x2_f - x1_f);
}
else
{
gimp_item_get_offset (item, &object_offset_x, &object_offset_y);
object_width = gimp_item_get_width (item);
object_height = gimp_item_get_height (item);
}
}
else if (GIMP_IS_GUIDE (object))
{
GimpGuide *guide = GIMP_GUIDE (object);
switch (gimp_guide_get_orientation (guide))
{
case GIMP_ORIENTATION_VERTICAL:
object_offset_x = gimp_guide_get_position (guide);
object_width = 0;
break;
case GIMP_ORIENTATION_HORIZONTAL:
object_offset_y = gimp_guide_get_position (guide);
object_height = 0;
break;
default:
break;
}
}
else
{
g_printerr ("Alignment object is not an image, item or guide.\n");
}
switch (alignment)
{
case GIMP_ALIGN_LEFT:
case GIMP_ARRANGE_LEFT:
offset = object_offset_x;
break;
case GIMP_ALIGN_HCENTER:
case GIMP_ARRANGE_HCENTER:
offset = object_offset_x + object_width/2;
break;
case GIMP_ALIGN_RIGHT:
case GIMP_ARRANGE_RIGHT:
offset = object_offset_x + object_width;
break;
case GIMP_ALIGN_TOP:
case GIMP_ARRANGE_TOP:
offset = object_offset_y;
break;
case GIMP_ALIGN_VCENTER:
case GIMP_ARRANGE_VCENTER:
offset = object_offset_y + object_height/2;
break;
case GIMP_ALIGN_BOTTOM:
case GIMP_ARRANGE_BOTTOM:
offset = object_offset_y + object_height;
break;
default:
g_assert_not_reached ();
}
g_object_set_data (object, "align-offset",
GINT_TO_POINTER (offset));
}
static void
gimp_align_tool_draw (GimpDrawTool *draw_tool)
{
GimpAlignTool *align_tool = GIMP_ALIGN_TOOL (draw_tool);
GList *list;
gint x, y, w, h;
/* draw rubber-band rectangle */
x = MIN (align_tool->x1, align_tool->x0);
y = MIN (align_tool->y1, align_tool->y0);
w = MAX (align_tool->x1, align_tool->x0) - x;
h = MAX (align_tool->y1, align_tool->y0) - y;
gimp_draw_tool_draw_rectangle (draw_tool,
FALSE,
x, y,w, h,
FALSE);
for (list = g_list_first (align_tool->selected_objects); list;
list = g_list_next (list))
{
if (GIMP_IS_ITEM (list->data))
{
GimpItem *item = GIMP_ITEM (list->data);
if (GIMP_IS_VECTORS (list->data))
{
gdouble x1_f, y1_f, x2_f, y2_f;
gimp_vectors_bounds (GIMP_VECTORS (item),
&x1_f, &y1_f,
&x2_f, &y2_f);
x = ROUND (x1_f);
y = ROUND (y1_f);
w = ROUND (x2_f - x1_f);
h = ROUND (y2_f - y1_f);
}
else
{
gimp_item_offsets (item, &x, &y);
w = gimp_item_width (item);
h = gimp_item_height (item);
}
gimp_draw_tool_draw_handle (draw_tool, GIMP_HANDLE_FILLED_SQUARE,
x, y, MARKER_WIDTH, MARKER_WIDTH,
GTK_ANCHOR_NORTH_WEST, FALSE);
gimp_draw_tool_draw_handle (draw_tool, GIMP_HANDLE_FILLED_SQUARE,
x + w, y, MARKER_WIDTH, MARKER_WIDTH,
GTK_ANCHOR_NORTH_EAST, FALSE);
gimp_draw_tool_draw_handle (draw_tool, GIMP_HANDLE_FILLED_SQUARE,
x, y + h, MARKER_WIDTH, MARKER_WIDTH,
GTK_ANCHOR_SOUTH_WEST, FALSE);
gimp_draw_tool_draw_handle (draw_tool, GIMP_HANDLE_FILLED_SQUARE,
x + w, y + h, MARKER_WIDTH, MARKER_WIDTH,
GTK_ANCHOR_SOUTH_EAST, FALSE);
}
else if (GIMP_IS_GUIDE (list->data))
{
GimpGuide *guide = GIMP_GUIDE (list->data);
GimpImage *image = GIMP_TOOL (draw_tool)->display->image;
gint x, y;
gint w, h;
switch (gimp_guide_get_orientation (guide))
{
case GIMP_ORIENTATION_VERTICAL:
x = gimp_guide_get_position (guide);
h = gimp_image_get_height (image);
gimp_draw_tool_draw_handle (draw_tool, GIMP_HANDLE_FILLED_SQUARE,
x, h, MARKER_WIDTH, MARKER_WIDTH,
GTK_ANCHOR_SOUTH, FALSE);
gimp_draw_tool_draw_handle (draw_tool, GIMP_HANDLE_FILLED_SQUARE,
x, 0, MARKER_WIDTH, MARKER_WIDTH,
GTK_ANCHOR_NORTH, FALSE);
break;
case GIMP_ORIENTATION_HORIZONTAL:
y = gimp_guide_get_position (guide);
w = gimp_image_get_width (image);
gimp_draw_tool_draw_handle (draw_tool, GIMP_HANDLE_FILLED_SQUARE,
w, y, MARKER_WIDTH, MARKER_WIDTH,
GTK_ANCHOR_EAST, FALSE);
gimp_draw_tool_draw_handle (draw_tool, GIMP_HANDLE_FILLED_SQUARE,
0, y, MARKER_WIDTH, MARKER_WIDTH,
GTK_ANCHOR_WEST, FALSE);
break;
default:
break;
}
}
}
}
