static gboolean
_adg_get_map(GtkWidget *widget, gboolean local_space,
cairo_matrix_t *map, cairo_matrix_t *inverted)
{
AdgGtkAreaPrivate *data;
AdgEntity *entity;
data = ((AdgGtkArea *) widget)->data;
entity = (AdgEntity *) data->canvas;
if (entity == NULL)
return FALSE;
if (local_space) {
adg_matrix_copy(map, adg_entity_get_local_map(entity));
/* The inverted map is subject to the global matrix */
adg_matrix_copy(inverted, adg_entity_get_global_matrix(entity));
adg_matrix_transform(inverted, map, ADG_TRANSFORM_BEFORE);
} else {
adg_matrix_copy(map, adg_entity_get_global_map(entity));
adg_matrix_copy(inverted, map);
}
return cairo_matrix_invert(inverted) == CAIRO_STATUS_SUCCESS;
}
static void
_adg_arrange(AdgEntity *entity)
{
AdgAlignmentPrivate *data;
const CpmlExtents *extents;
CpmlExtents new_extents;
cairo_matrix_t ctm, ctm_inverted, old_map;
if (_ADG_OLD_ENTITY_CLASS->arrange == NULL)
return;
data = adg_alignment_get_instance_private((AdgAlignment *) entity);
extents = adg_entity_get_extents(entity);
data->shift.x = 0;
data->shift.y = 0;
/* The shift is performed only when relevant */
if (data->factor.x != 0 || data->factor.y != 0) {
/* Force the ctm to be the identity matrix */
adg_matrix_copy(&old_map, adg_entity_get_global_map(entity));
adg_matrix_copy(&ctm, adg_entity_get_global_map(entity));
adg_matrix_transform(&ctm, adg_entity_get_local_matrix(entity),
ADG_TRANSFORM_AFTER);
adg_matrix_copy(&ctm_inverted, &ctm);
cairo_matrix_invert(&ctm_inverted);
adg_entity_transform_global_map(entity, &ctm_inverted,
ADG_TRANSFORM_AFTER);
adg_entity_global_changed(entity);
/* Calculating the shift */
_ADG_OLD_ENTITY_CLASS->arrange(entity);
extents = adg_entity_get_extents(entity);
if (extents->is_defined) {
data->shift.x = -extents->size.x * data->factor.x;
data->shift.y = -extents->size.y * data->factor.y;
cpml_vector_transform(&data->shift, &ctm);
}
/* Restore the old global map */
adg_entity_set_global_map(entity, &old_map);
adg_entity_global_changed(entity);
}
/* Add the shift to the extents */
_ADG_OLD_ENTITY_CLASS->arrange(entity);
cpml_extents_copy(&new_extents, adg_entity_get_extents(entity));
new_extents.org.x += data->shift.x;
new_extents.org.y += data->shift.y;
adg_entity_set_extents(entity, &new_extents);
}
static void
_adg_set_property(GObject *object, guint prop_id,
const GValue *value, GParamSpec *pspec)
{
AdgGtkAreaPrivate *data = adg_gtk_area_get_instance_private((AdgGtkArea *) object);
AdgCanvas *new_canvas, *old_canvas;
switch (prop_id) {
case PROP_CANVAS:
new_canvas = g_value_get_object(value);
old_canvas = data->canvas;
if (new_canvas != old_canvas) {
if (new_canvas != NULL)
g_object_ref(new_canvas);
if (old_canvas != NULL)
g_object_unref(old_canvas);
data->canvas = new_canvas;
g_signal_emit(object, _adg_signals[CANVAS_CHANGED], 0, old_canvas);
}
break;
case PROP_FACTOR:
data->factor = g_value_get_double(value);
break;
case PROP_AUTOZOOM:
data->autozoom = g_value_get_boolean(value);
break;
case PROP_RENDER_MAP:
adg_matrix_copy(&data->render_map, g_value_get_boxed(value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
break;
}
}
/**
* adg_gtk_area_transform_render_map:
* @area: an #AdgGtkArea object
* @transformation: the transformation to apply
* @mode: how @transformation should be applied
*
* Convenient function to change the render map of @area by
* applying @tranformation using the @mode operator. This is
* logically equivalent to the following:
*
* <informalexample><programlisting language="C">
* cairo_matrix_t map;
* adg_matrix_copy(&map, adg_gtk_area_get_render_map(area));
* adg_matrix_transform(&map, transformation, mode);
* adg_gtk_area_set_render_map(area, &map);
* </programlisting></informalexample>
*
* <note><para>
* The render map is an implementation detail and this function
* is expected to be used only by #AdgGtkArea derived objects.
* </para></note>
*
* Since: 1.0
**/
void
adg_gtk_area_transform_render_map(AdgGtkArea *area,
const cairo_matrix_t *transformation,
AdgTransformMode mode)
{
AdgGtkAreaPrivate *data;
cairo_matrix_t map;
g_return_if_fail(ADG_GTK_IS_AREA(area));
g_return_if_fail(transformation != NULL);
data = adg_gtk_area_get_instance_private(area);
adg_matrix_copy(&map, &data->render_map);
adg_matrix_transform(&map, transformation, mode);
g_object_set(area, "render-map", &map, NULL);
}
static void
_adg_arrange(AdgEntity *entity)
{
AdgADim *adim;
AdgDim *dim;
AdgADimPrivate *data;
AdgAlignment *quote;
const cairo_matrix_t *global, *local;
CpmlPair ref1, ref2, base1, base12, base2;
CpmlPair pair;
CpmlExtents extents;
AdgEntity *marker_entity;
if (_ADG_OLD_ENTITY_CLASS->arrange)
_ADG_OLD_ENTITY_CLASS->arrange(entity);
adim = (AdgADim *) entity;
if (! _adg_update_geometry(adim))
return;
dim = (AdgDim *) adim;
data = adim->data;
quote = adg_dim_get_quote(dim);
_adg_update_entities(adim);
if (data->cairo.path.status == CAIRO_STATUS_SUCCESS) {
AdgEntity *quote_entity = (AdgEntity *) quote;
adg_entity_set_global_map(quote_entity, &data->quote.global_map);
return;
}
global = adg_entity_get_global_matrix(entity);
local = adg_entity_get_local_matrix(entity);
extents.is_defined = FALSE;
cpml_pair_copy(&ref1, (CpmlPair *) adg_dim_get_ref1(dim));
cpml_pair_copy(&ref2, (CpmlPair *) adg_dim_get_ref2(dim));
cpml_pair_copy(&base1, &data->point.base1);
cpml_pair_copy(&base12, &data->point.base12);
cpml_pair_copy(&base2, &data->point.base2);
/* Apply the local matrix to the relevant points */
cpml_pair_transform(&ref1, local);
cpml_pair_transform(&ref2, local);
cpml_pair_transform(&base1, local);
cpml_pair_transform(&base12, local);
cpml_pair_transform(&base2, local);
/* Combine points and global shifts to build the path */
pair.x = ref1.x + data->shift.from1.x;
pair.y = ref1.y + data->shift.from1.y;
cpml_pair_to_cairo(&pair, &data->cairo.data[6]);
pair.x = base1.x + data->shift.base1.x;
pair.y = base1.y + data->shift.base1.y;
cpml_pair_to_cairo(&pair, &data->cairo.data[1]);
pair.x += data->shift.to1.x;
pair.y += data->shift.to1.y;
cpml_pair_to_cairo(&pair, &data->cairo.data[8]);
pair.x = base12.x + data->shift.base12.x;
pair.y = base12.y + data->shift.base12.y;
cpml_pair_to_cairo(&pair, &data->cairo.data[3]);
pair.x = ref2.x + data->shift.from2.x;
pair.y = ref2.y + data->shift.from2.y;
cpml_pair_to_cairo(&pair, &data->cairo.data[10]);
pair.x = base2.x + data->shift.base2.x;
pair.y = base2.y + data->shift.base2.y;
cpml_pair_to_cairo(&pair, &data->cairo.data[4]);
pair.x += data->shift.to2.x;
pair.y += data->shift.to2.y;
cpml_pair_to_cairo(&pair, &data->cairo.data[12]);
/* Play with header lengths to show or hide the extension lines */
if (data->has_extension1) {
data->cairo.data[7].header.length = data->has_extension2 ? 2 : 6;
} else {
data->cairo.data[2].header.length = data->has_extension2 ? 7 : 11;
}
data->cairo.path.status = CAIRO_STATUS_SUCCESS;
/* Arrange the quote */
if (quote != NULL) {
AdgEntity *quote_entity;
gdouble angle;
cairo_matrix_t map;
quote_entity = (AdgEntity *) quote;
angle = adg_dim_quote_angle(dim, (data->angle1 + data->angle2) / 2 + G_PI_2);
cpml_pair_from_cairo(&pair, &data->cairo.data[3]);
adg_alignment_set_factor_explicit(quote, 0.5, 0);
cairo_matrix_init_translate(&map, pair.x, pair.y);
cairo_matrix_rotate(&map, angle);
adg_entity_set_global_map(quote_entity, &map);
adg_entity_arrange(quote_entity);
cpml_extents_add(&extents, adg_entity_get_extents(quote_entity));
adg_matrix_copy(&data->quote.global_map, &map);
}
/* Arrange the trail */
if (data->trail != NULL) {
CpmlExtents trail_extents;
cpml_extents_copy(&trail_extents, adg_trail_get_extents(data->trail));
cpml_extents_transform(&trail_extents, global);
cpml_extents_add(&extents, &trail_extents);
} else {
_adg_dispose_markers(adim);
}
/* Arrange the markers */
if (data->marker1 != NULL) {
marker_entity = (AdgEntity *) data->marker1;
adg_marker_set_segment(data->marker1, data->trail, 1);
adg_entity_local_changed(marker_entity);
adg_entity_arrange(marker_entity);
cpml_extents_add(&extents, adg_entity_get_extents(marker_entity));
}
if (data->marker2 != NULL) {
marker_entity = (AdgEntity *) data->marker2;
adg_marker_set_segment(data->marker2, data->trail, 1);
adg_entity_local_changed(marker_entity);
adg_entity_arrange(marker_entity);
cpml_extents_add(&extents, adg_entity_get_extents(marker_entity));
}
adg_entity_set_extents(entity, &extents);
}