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widget: Consider widget transformations in translate_coordinatesf

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This commit is contained in:
Timm Bäder
2018-08-11 22:14:33 +02:00
parent b0bf689e3b
commit d59120e44f
1 changed files with 16 additions and 13 deletions
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29
gtk/gtkwidget.c
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@@ -4415,7 +4415,7 @@ gtk_widget_translate_coordinatesf (GtkWidget *src_widget,
int dest_depth;
GtkWidget **dest_path;
int i;
graphene_point_t src_point;
graphene_vec4_t src_point;
g_return_val_if_fail (GTK_IS_WIDGET (src_widget), FALSE);
g_return_val_if_fail (GTK_IS_WIDGET (dest_widget), FALSE);
@@ -4448,22 +4448,19 @@ gtk_widget_translate_coordinatesf (GtkWidget *src_widget,
i ++;
}
src_point.x = src_x;
src_point.y = src_y;
graphene_vec4_init (&src_point, src_x, src_y, 0, 1);
parent = src_widget;
while (parent != ancestor)
{
graphene_matrix_t inv_transform;
graphene_vec4_t offset;
int origin_x, origin_y;
gtk_widget_get_origin_relative_to_parent (parent, &origin_x, &origin_y);
src_point.x += origin_x;
src_point.y += origin_y;
g_assert (graphene_matrix_inverse (&parent->priv->transform, &inv_transform));
graphene_matrix_transform_point (&inv_transform, &src_point, &src_point);
graphene_matrix_transform_vec4 (&parent->priv->transform, &src_point, &src_point);
graphene_vec4_init (&offset, origin_x, origin_y, 0, 0);
graphene_vec4_add (&src_point, &offset, &src_point);
parent = _gtk_widget_get_parent (parent);
}
@@ -4473,20 +4470,26 @@ gtk_widget_translate_coordinatesf (GtkWidget *src_widget,
for (i = 0; i < dest_depth; i ++)
{
int origin_x, origin_y;
graphene_vec4_t offset;
graphene_matrix_t inv_transform;
parent = dest_path[i];
gtk_widget_get_origin_relative_to_parent (parent, &origin_x, &origin_y);
src_point.x -= origin_x;
src_point.y -= origin_y;
graphene_vec4_init (&offset, -origin_x, -origin_y, 0, 0);
graphene_vec4_add (&src_point, &offset, &src_point);
/* TODO: inversion can fail */
graphene_matrix_inverse (&parent->priv->transform, &inv_transform);
graphene_matrix_transform_vec4 (&inv_transform, &src_point, &src_point);
}
if (dest_x)
*dest_x = src_point.x;
*dest_x = graphene_vec4_get_x (&src_point);
if (dest_y)
*dest_y = src_point.y;
*dest_y = graphene_vec4_get_y (&src_point);
return TRUE;
}