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Refactor oper_connect_motion().

This commit is contained in:
Přemysl Eric Janouch 2011-02-20 12:41:45 +01:00
parent d4bfd8a504
commit f9827e2ff3
1 changed files with 51 additions and 25 deletions
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76
liblogdiag/ld-diagram-view.c
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@ -293,6 +293,7 @@ static void oper_add_object_end (LdDiagramView *self);
static void oper_connect_begin (LdDiagramView *self, const LdPoint *point);
static void oper_connect_end (LdDiagramView *self);
static void oper_connect_motion (LdDiagramView *self, const LdPoint *point);
static LdPointArray *create_connection_path (const LdPoint *end_point);
static void oper_select_begin (LdDiagramView *self, const LdPoint *point);
static void oper_select_end (LdDiagramView *self);
@ -1779,42 +1780,22 @@ oper_connect_motion (LdDiagramView *self, const LdPoint *point)
{
ConnectData *data;
LdPointArray *points;
LdPoint end_point;
gdouble diagram_x, diagram_y;
data = &OPER_DATA (self, connect);
/* Find an orthogonal path between the points. */
/* TODO: This alghorithm is pretty lame, needs to be improved. */
points = ld_point_array_sized_new (4);
points->length = 4;
points->points[0].x = 0;
points->points[0].y = 0;
ld_diagram_view_widget_to_diagram_coords (self,
point->x, point->y, &diagram_x, &diagram_y);
points->points[3].x = floor (diagram_x - data->origin.x + 0.5);
points->points[3].y = floor (diagram_y - data->origin.y + 0.5);
end_point.x = floor (diagram_x - data->origin.x + 0.5);
end_point.y = floor (diagram_y - data->origin.y + 0.5);
if (ABS (points->points[3].x) > ABS (points->points[3].y))
{
points->points[1].x = points->points[3].x / 2;
points->points[1].y = 0;
points->points[2].x = points->points[3].x / 2;
points->points[2].y = points->points[3].y;
}
else
{
points->points[1].x = 0;
points->points[1].y = points->points[3].y / 2;
points->points[2].x = points->points[3].x;
points->points[2].y = points->points[3].y / 2;
}
points = create_connection_path (&end_point);
queue_object_draw (self, LD_DIAGRAM_OBJECT (data->connection));
ld_diagram_connection_set_points (data->connection, points);
queue_object_draw (self, LD_DIAGRAM_OBJECT (data->connection));
ld_point_array_free (points);
queue_object_draw (self, LD_DIAGRAM_OBJECT (data->connection));
check_terminals (self, point);
@ -1823,6 +1804,51 @@ oper_connect_motion (LdDiagramView *self, const LdPoint *point)
self->priv->terminal_hovered = FALSE;
}
/* create_connection_path:
* @end_point: the end point of the path. The start point is always at {0, 0}.
*
* Create an orthogonal path between two points.
*/
static LdPointArray *
create_connection_path (const LdPoint *end_point)
{
LdPointArray *points;
if (end_point->x == 0 || end_point->y == 0)
{
points = ld_point_array_sized_new (2);
points->length = 2;
points->points[0].x = 0;
points->points[0].y = 0;
points->points[1] = *end_point;
return points;
}
points = ld_point_array_sized_new (4);
points->length = 4;
points->points[0].x = 0;
points->points[0].y = 0;
points->points[3] = *end_point;
if (ABS (end_point->x) > ABS (end_point->y))
{
points->points[1].x = end_point->x / 2;
points->points[1].y = 0;
points->points[2].x = end_point->x / 2;
points->points[2].y = end_point->y;
}
else
{
points->points[1].x = 0;
points->points[1].y = end_point->y / 2;
points->points[2].x = end_point->x;
points->points[2].y = end_point->y / 2;
}
return points;
}
static void
oper_select_begin (LdDiagramView *self, const LdPoint *point)
{