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path-tool: Add a way to show controls

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This commit is contained in:
Matthias Clasen 2023-08-30 23:40:31 -04:00
parent 3f63ba36ce
commit 061a56d213
2 changed files with 198 additions and 8 deletions
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22
tools/gtk-path-tool-show.c
View File

@ -35,7 +35,9 @@ static void
show_path_fill (GskPath *path,
GskFillRule fill_rule,
const GdkRGBA *fg_color,
const GdkRGBA *bg_color)
const GdkRGBA *bg_color,
gboolean show_points,
gboolean show_controls)
{
GtkWidget *window, *sw, *child;
@ -55,7 +57,10 @@ show_path_fill (GskPath *path,
"fill-rule", fill_rule,
"fg-color", fg_color,
"bg-color", bg_color,
"show-points", show_points,
"show-controls", show_controls,
NULL);
gtk_widget_set_hexpand (child, TRUE);
gtk_widget_set_vexpand (child, TRUE);
gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (sw), child);
@ -70,7 +75,9 @@ static void
show_path_stroke (GskPath *path,
GskStroke *stroke,
const GdkRGBA *fg_color,
const GdkRGBA *bg_color)
const GdkRGBA *bg_color,
gboolean show_points,
gboolean show_controls)
{
GtkWidget *window, *sw, *child;
@ -90,7 +97,10 @@ show_path_stroke (GskPath *path,
"stroke", stroke,
"fg-color", fg_color,
"bg-color", bg_color,
"show-points", show_points,
"show-controls", show_controls,
NULL);
gtk_widget_set_hexpand (child, TRUE);
gtk_widget_set_vexpand (child, TRUE);
gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (sw), child);
@ -107,6 +117,8 @@ do_show (int *argc,
{
GError *error = NULL;
gboolean do_stroke = FALSE;
gboolean show_points = FALSE;
gboolean show_controls = FALSE;
const char *fill = "winding";
const char *fg_color = "black";
const char *bg_color = "white";
@ -122,6 +134,8 @@ do_show (int *argc,
const GOptionEntry entries[] = {
{ "fill", 0, G_OPTION_FLAG_REVERSE, G_OPTION_ARG_NONE, &do_stroke, N_("Fill the path (the default)"), NULL },
{ "stroke", 0, 0, G_OPTION_ARG_NONE, &do_stroke, N_("Stroke the path"), NULL },
{ "points", 0, 0, G_OPTION_ARG_NONE, &show_points, N_("Show points"), NULL },
{ "controls", 0, 0, G_OPTION_ARG_NONE, &show_controls, N_("Show controls"), NULL },
{ "fg-color", 0, 0, G_OPTION_ARG_STRING, &fg_color, N_("Foreground color"), N_("COLOR") },
{ "bg-color", 0, 0, G_OPTION_ARG_STRING, &bg_color, N_("Background color"), N_("COLOR") },
{ G_OPTION_REMAINING, 0, 0, G_OPTION_ARG_STRING_ARRAY, &args, NULL, N_("PATH") },
@ -214,9 +228,9 @@ do_show (int *argc,
_gsk_stroke_set_dashes (stroke, dashes);
if (do_stroke)
show_path_stroke (path, stroke, &fg, &bg);
show_path_stroke (path, stroke, &fg, &bg, show_points, show_controls);
else
show_path_fill (path, fill_rule, &fg, &bg);
show_path_fill (path, fill_rule, &fg, &bg, show_points, show_controls);
gsk_path_unref (path);

184
tools/path-view.c
View File

@ -33,6 +33,10 @@ struct _PathView
GdkRGBA bg;
int padding;
gboolean do_fill;
gboolean show_points;
gboolean show_controls;
GskPath *line_path;
GskPath *point_path;
};
enum {
@ -42,6 +46,8 @@ enum {
PROP_FILL_RULE,
PROP_FG_COLOR,
PROP_BG_COLOR,
PROP_SHOW_POINTS,
PROP_SHOW_CONTROLS,
N_PROPERTIES
};
@ -72,6 +78,8 @@ path_view_dispose (GObject *object)
g_clear_pointer (&self->path, gsk_path_unref);
g_clear_pointer (&self->stroke, gsk_stroke_free);
g_clear_pointer (&self->line_path, gsk_path_unref);
g_clear_pointer (&self->point_path, gsk_path_unref);
G_OBJECT_CLASS (path_view_parent_class)->dispose (object);
}
@ -110,6 +118,14 @@ path_view_get_property (GObject *object,
g_value_set_boxed (value, &self->bg);
break;
case PROP_SHOW_POINTS:
g_value_set_boolean (value, self->show_points);
break;
case PROP_SHOW_CONTROLS:
g_value_set_boolean (value, self->show_controls);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
@ -123,6 +139,124 @@ update_bounds (PathView *self)
gsk_path_get_bounds (self->path, &self->bounds);
else
gsk_path_get_stroke_bounds (self->path, self->stroke, &self->bounds);
if (self->line_path)
{
graphene_rect_t bounds;
gsk_path_get_stroke_bounds (self->line_path, self->stroke, &bounds);
graphene_rect_union (&bounds, &self->bounds, &self->bounds);
}
if (self->point_path)
{
graphene_rect_t bounds;
gsk_path_get_stroke_bounds (self->point_path, self->stroke, &bounds);
graphene_rect_union (&bounds, &self->bounds, &self->bounds);
}
}
typedef struct
{
PathView *self;
GskPathBuilder *line_builder;
GskPathBuilder *point_builder;
} ControlData;
static gboolean
collect_cb (GskPathOperation op,
const graphene_point_t *pts,
gsize n_pts,
float weight,
gpointer data)
{
ControlData *cd = data;
switch (op)
{
case GSK_PATH_MOVE:
if (cd->point_builder)
gsk_path_builder_add_circle (cd->point_builder, &pts[0], 4);
if (cd->line_builder)
gsk_path_builder_move_to (cd->line_builder, pts[0].x, pts[0].y);
break;
case GSK_PATH_LINE:
case GSK_PATH_CLOSE:
if (cd->point_builder)
gsk_path_builder_add_circle (cd->point_builder, &pts[1], 4);
if (cd->line_builder)
gsk_path_builder_line_to (cd->line_builder, pts[1].x, pts[1].y);
break;
case GSK_PATH_QUAD:
case GSK_PATH_CONIC:
if (cd->point_builder)
{
if (cd->self->show_controls)
gsk_path_builder_add_circle (cd->point_builder, &pts[1], 3);
gsk_path_builder_add_circle (cd->point_builder, &pts[2], 4);
}
if (cd->line_builder)
{
gsk_path_builder_line_to (cd->line_builder, pts[1].x, pts[1].y);
gsk_path_builder_line_to (cd->line_builder, pts[2].x, pts[2].y);
}
break;
case GSK_PATH_CUBIC:
if (cd->point_builder)
{
if (cd->self->show_controls)
{
gsk_path_builder_add_circle (cd->point_builder, &pts[1], 3);
gsk_path_builder_add_circle (cd->point_builder, &pts[2], 3);
}
gsk_path_builder_add_circle (cd->point_builder, &pts[3], 4);
}
if (cd->line_builder)
{
gsk_path_builder_line_to (cd->line_builder, pts[1].x, pts[1].y);
gsk_path_builder_line_to (cd->line_builder, pts[2].x, pts[2].y);
gsk_path_builder_line_to (cd->line_builder, pts[3].x, pts[3].y);
}
break;
default:
g_assert_not_reached ();
}
return TRUE;
}
static void
update_controls (PathView *self)
{
ControlData data = { 0, };
data.self = self;
g_clear_pointer (&self->line_path, gsk_path_unref);
g_clear_pointer (&self->point_path, gsk_path_unref);
if (self->path && self->show_controls)
data.line_builder = gsk_path_builder_new ();
if (self->path && (self->show_points || self->show_controls))
data.point_builder = gsk_path_builder_new ();
if (data.line_builder || data.point_builder)
{
gsk_path_foreach (self->path, -1, collect_cb, &data);
if (data.line_builder)
self->line_path = gsk_path_builder_free_to_path (data.line_builder);
if (data.point_builder)
self->point_path = gsk_path_builder_free_to_path (data.point_builder);
}
update_bounds (self);
}
static void
@ -139,6 +273,7 @@ path_view_set_property (GObject *object,
case PROP_PATH:
g_clear_pointer (&self->path, gsk_path_unref);
self->path = g_value_dup_boxed (value);
update_controls (self);
update_bounds (self);
gtk_widget_queue_resize (GTK_WIDGET (self));
break;
@ -171,6 +306,18 @@ path_view_set_property (GObject *object,
gtk_widget_queue_draw (GTK_WIDGET (self));
break;
case PROP_SHOW_POINTS:
self->show_points = g_value_get_boolean (value);
update_controls (self);
gtk_widget_queue_draw (GTK_WIDGET (self));
break;
case PROP_SHOW_CONTROLS:
self->show_controls = g_value_get_boolean (value);
update_controls (self);
gtk_widget_queue_draw (GTK_WIDGET (self));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
@ -204,14 +351,33 @@ path_view_snapshot (GtkWidget *widget,
graphene_rect_inset (&bounds, - self->padding, - self->padding);
gtk_snapshot_save (snapshot);
gtk_snapshot_append_color (snapshot, &self->bg, &self->bounds);
gtk_snapshot_translate (snapshot, &GRAPHENE_POINT_INIT (self->padding, self->padding));
if (self->do_fill)
gtk_snapshot_push_fill (snapshot, self->path, self->fill_rule);
gtk_snapshot_append_fill (snapshot, self->path, self->fill_rule, &self->fg);
else
gtk_snapshot_push_stroke (snapshot, self->path, self->stroke);
gtk_snapshot_append_color (snapshot, &self->fg, &self->bounds);
gtk_snapshot_pop (snapshot);
gtk_snapshot_append_stroke (snapshot, self->path, self->stroke, &self->fg);
if (self->line_path)
{
GskStroke *stroke = gsk_stroke_new (1);
GdkRGBA gray = (GdkRGBA) { 0, 0, 0, 0.5 };
gtk_snapshot_append_stroke (snapshot, self->line_path, stroke, &gray);
}
if (self->point_path)
{
GskStroke *stroke = gsk_stroke_new (1);
GdkRGBA purple = (GdkRGBA) { 1, 0, 1, 1 };
GdkRGBA black = (GdkRGBA) { 0, 0, 0, 1 };
gtk_snapshot_append_fill (snapshot, self->point_path, GSK_FILL_RULE_WINDING, &purple);
gtk_snapshot_append_stroke (snapshot, self->point_path, stroke, &black);
}
gtk_snapshot_restore (snapshot);
}
@ -259,6 +425,16 @@ path_view_class_init (PathViewClass *class)
GDK_TYPE_RGBA,
G_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
properties[PROP_SHOW_POINTS]
= g_param_spec_boolean ("show-points", NULL, NULL,
FALSE,
G_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
properties[PROP_SHOW_CONTROLS]
= g_param_spec_boolean ("show-controls", NULL, NULL,
FALSE,
G_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
g_object_class_install_properties (object_class, N_PROPERTIES, properties);
}