/**
* mx_tooltip_set_tip_area_from_actor:
* @tooltip: A #MxTooltip
* @actor: A #ClutterActor
*
* Utility function to set the geometry of the tooltip area
* from an existing actor.
* See also mx_tooltip_set_tip_area
*
*/
void mx_tooltip_set_tip_area_from_actor (MxTooltip *tooltip,
ClutterActor *actor)
{
ClutterVertex verts[4];
ClutterGeometry area;
gfloat x, y, x2, y2;
gint i;
/* Work out the bounding box */
clutter_actor_get_abs_allocation_vertices (actor, verts);
x = y = G_MAXFLOAT;
x2 = y2 = -G_MAXFLOAT;
for (i = 0; i < G_N_ELEMENTS (verts); i++)
{
if (verts[i].x < x)
x = verts[i].x;
if (verts[i].x > x2)
x2 = verts[i].x;
if (verts[i].y < y)
y = verts[i].y;
if (verts[i].y > y2)
y2 = verts[i].y;
}
area.x = x;
area.y = y;
area.width = x2 - x;
area.height = y2 - y;
mx_tooltip_set_tip_area (tooltip, &area);
}
/* We can only (easily) apply our logic for figuring out what a window
* obscures if is not transformed. This function does that check and
* as a side effect gets the position of the upper-left corner of the
* actors.
*
* (We actually could handle scaled and non-integrally positioned actors
* too as long as they weren't shaped - no filtering is done at the
* edges so a rectangle stays a rectangle. But the gain from that is
* small, especally since most of our windows are shaped. The simple
* case we handle here is the case that matters when the user is just
* using the desktop normally.)
*
* If we assume that the window group is untransformed (it better not
* be!) then we could also make this determination by checking directly
* if the actor itself is rotated, scaled, or at a non-integral position.
* However, the criterion for "close enough" in that case get trickier,
* since, for example, the allowed rotation depends on the size of
* actor. The approach we take here is to just require everything
* to be within 1/256th of a pixel.
*/
static gboolean
actor_is_untransformed (ClutterActor *actor,
int *x_origin,
int *y_origin)
{
gfloat widthf, heightf;
int width, height;
ClutterVertex verts[4];
int v0x, v0y, v1x, v1y, v2x, v2y, v3x, v3y;
int x, y;
clutter_actor_get_size (actor, &widthf, &heightf);
width = round_to_fixed (widthf); height = round_to_fixed (heightf);
clutter_actor_get_abs_allocation_vertices (actor, verts);
v0x = round_to_fixed (verts[0].x); v0y = round_to_fixed (verts[0].y);
v1x = round_to_fixed (verts[1].x); v1y = round_to_fixed (verts[1].y);
v2x = round_to_fixed (verts[2].x); v2y = round_to_fixed (verts[2].y);
v3x = round_to_fixed (verts[3].x); v3y = round_to_fixed (verts[3].y);
/* Using shifting for converting fixed => int, gets things right for
* negative values. / 256. wouldn't do the same
*/
x = v0x >> 8;
y = v0y >> 8;
/* At integral coordinates? */
if (x * 256 != v0x || y * 256 != v0y)
return FALSE;
/* Not scaled? */
if (v1x - v0x != width || v2y - v0y != height)
return FALSE;
/* Not rotated/skewed? */
if (v0x != v2x || v0y != v1y ||
v3x != v1x || v3y != v2y)
return FALSE;
*x_origin = x;
*y_origin = y;
return TRUE;
}
void cs_selected_paint (void)
{
ClutterVertex verts[4];
/* draw outlines for actors */
GHashTableIter iter;
gpointer key, value;
{
{
if (cs->fake_stage)
{
cogl_set_source_color4ub (0, 255, 0, 255);
cs_draw_actor_outline (cs->fake_stage, NULL);
}
}
}
cogl_set_source_color4ub (255, 0, 0, 128);
cs_selected_foreach (G_CALLBACK (cs_draw_actor_outline), NULL);
g_hash_table_iter_init (&iter, selection);
while (g_hash_table_iter_next (&iter, &key, &value))
{
clutter_actor_get_abs_allocation_vertices (key,
verts);
cogl_set_source_color4ub (0, 0, 25, 50);
{
{
gfloat coords[]={ verts[0].x, verts[0].y,
verts[1].x, verts[1].y,
verts[3].x, verts[3].y,
verts[2].x, verts[2].y,
verts[0].x, verts[0].y };
cogl_path_polyline (coords, 5);
cogl_set_source_color4ub (0, 0, 255, 128);
cogl_path_stroke ();
}
}
}
}
/**
* shell_util_get_transformed_allocation:
* @actor: a #ClutterActor
* @box: (out): location to store returned box in stage coordinates
*
* This function is similar to a combination of clutter_actor_get_transformed_position(),
* and clutter_actor_get_transformed_size(), but unlike
* clutter_actor_get_transformed_size(), it always returns a transform
* of the current allocation, while clutter_actor_get_transformed_size() returns
* bad values (the transform of the requested size) if a relayout has been
* queued.
*
* This function is more convenient to use than
* clutter_actor_get_abs_allocation_vertices() if no transformation is in effect
* and also works around limitations in the GJS binding of arrays.
*/
void
shell_util_get_transformed_allocation (ClutterActor *actor,
ClutterActorBox *box)
{
/* Code adapted from clutter-actor.c:
* Copyright 2006, 2007, 2008 OpenedHand Ltd
*/
ClutterVertex v[4];
gfloat x_min, x_max, y_min, y_max;
gint i;
g_return_if_fail (CLUTTER_IS_ACTOR (actor));
clutter_actor_get_abs_allocation_vertices (actor, v);
x_min = x_max = v[0].x;
y_min = y_max = v[0].y;
for (i = 1; i < G_N_ELEMENTS (v); ++i)
{
if (v[i].x < x_min)
x_min = v[i].x;
if (v[i].x > x_max)
x_max = v[i].x;
if (v[i].y < y_min)
y_min = v[i].y;
if (v[i].y > y_max)
y_max = v[i].y;
}
box->x1 = x_min;
box->y1 = y_min;
box->x2 = x_max;
box->y2 = y_max;
}
static void
st_scroll_view_fade_paint_target (ClutterOffscreenEffect *effect)
{
StScrollViewFade *self = ST_SCROLL_VIEW_FADE (effect);
ClutterOffscreenEffectClass *parent;
CoglHandle material;
gdouble value, lower, upper, page_size;
ClutterActor *vscroll = st_scroll_view_get_vscroll_bar (ST_SCROLL_VIEW (self->actor));
ClutterActor *hscroll = st_scroll_view_get_hscroll_bar (ST_SCROLL_VIEW (self->actor));
gboolean h_scroll_visible, v_scroll_visible;
ClutterActorBox allocation, content_box, paint_box;
/*
* Used to pass the fade area to the shader
*
* [0][0] = x1
* [0][1] = y1
* [1][0] = x2
* [1][1] = y2
*
*/
float fade_area[2][2];
ClutterVertex verts[4];
if (self->program == COGL_INVALID_HANDLE)
goto out;
clutter_actor_get_paint_box (self->actor, &paint_box);
clutter_actor_get_abs_allocation_vertices (self->actor, verts);
clutter_actor_get_allocation_box (self->actor, &allocation);
st_theme_node_get_content_box (st_widget_get_theme_node (ST_WIDGET (self->actor)),
(const ClutterActorBox *)&allocation, &content_box);
/*
* The FBO is based on the paint_volume's size which can be larger then the actual
* allocation, so we have to account for that when passing the positions
*/
fade_area[0][0] = content_box.x1 + (verts[0].x - paint_box.x1);
fade_area[0][1] = content_box.y1 + (verts[0].y - paint_box.y1);
fade_area[1][0] = content_box.x2 + (verts[3].x - paint_box.x2);
fade_area[1][1] = content_box.y2 + (verts[3].y - paint_box.y2);
g_object_get (ST_SCROLL_VIEW (self->actor),
"hscrollbar-visible", &h_scroll_visible,
"vscrollbar-visible", &v_scroll_visible,
NULL);
if (v_scroll_visible)
{
if (st_widget_get_direction (ST_WIDGET (self->actor)) == ST_TEXT_DIRECTION_RTL)
fade_area[0][0] += clutter_actor_get_width (vscroll);
fade_area[1][0] -= clutter_actor_get_width (vscroll);
}
if (h_scroll_visible)
fade_area[1][1] -= clutter_actor_get_height (hscroll);
st_adjustment_get_values (self->vadjustment, &value, &lower, &upper, NULL, NULL, &page_size);
if (self->offset_top_uniform > -1) {
if (value > lower + 0.1)
cogl_program_set_uniform_1f (self->program, self->offset_top_uniform, self->fade_offset);
else
cogl_program_set_uniform_1f (self->program, self->offset_top_uniform, 0.0f);
}
if (self->offset_bottom_uniform > -1) {
if (value < upper - page_size - 0.1)
cogl_program_set_uniform_1f (self->program, self->offset_bottom_uniform, self->fade_offset);
else
cogl_program_set_uniform_1f (self->program, self->offset_bottom_uniform, 0.0f);
}
if (self->tex_uniform > -1)
cogl_program_set_uniform_1i (self->program, self->tex_uniform, 0);
if (self->height_uniform > -1)
cogl_program_set_uniform_1f (self->program, self->height_uniform, clutter_actor_get_height (self->actor));
if (self->width_uniform > -1)
cogl_program_set_uniform_1f (self->program, self->width_uniform, clutter_actor_get_width (self->actor));
if (self->fade_area_uniform > -1)
cogl_program_set_uniform_matrix (self->program, self->fade_area_uniform, 2, 1, FALSE, (const float *)fade_area);
material = clutter_offscreen_effect_get_target (effect);
cogl_material_set_user_program (material, self->program);
out:
parent = CLUTTER_OFFSCREEN_EFFECT_CLASS (st_scroll_view_fade_parent_class);
parent->paint_target (effect);
}
