458 lines
12 KiB
C
458 lines
12 KiB
C
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/* Copyright 2023 Red Hat, Inc.
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*
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* GTK+ is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* GLib is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with GTK+; see the file COPYING. If not,
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* see <http://www.gnu.org/licenses/>.
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*
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* Author: Matthias Clasen
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*/
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#include "config.h"
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#include "path-view.h"
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struct _PathView
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{
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GtkWidget parent_instance;
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GskPath *path;
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GskStroke *stroke;
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graphene_rect_t bounds;
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GskFillRule fill_rule;
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GdkRGBA fg;
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GdkRGBA bg;
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int padding;
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gboolean do_fill;
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gboolean show_points;
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gboolean show_controls;
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GskPath *line_path;
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GskPath *point_path;
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GdkRGBA point_color;
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};
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enum {
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PROP_PATH = 1,
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PROP_DO_FILL,
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PROP_STROKE,
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PROP_FILL_RULE,
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PROP_FG_COLOR,
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PROP_BG_COLOR,
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PROP_POINT_COLOR,
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PROP_SHOW_POINTS,
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PROP_SHOW_CONTROLS,
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N_PROPERTIES
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};
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static GParamSpec *properties[N_PROPERTIES] = { NULL, };
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struct _PathViewClass
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{
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GtkWidgetClass parent_class;
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};
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G_DEFINE_TYPE (PathView, path_view, GTK_TYPE_WIDGET)
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static void
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path_view_init (PathView *self)
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{
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self->do_fill = TRUE;
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self->stroke = gsk_stroke_new (1);
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self->fill_rule = GSK_FILL_RULE_WINDING;
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self->fg = (GdkRGBA) { 0, 0, 0, 1};
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self->bg = (GdkRGBA) { 1, 1, 1, 1};
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self->point_color = (GdkRGBA) { 1, 0, 0, 1};
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self->padding = 10;
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}
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static void
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path_view_dispose (GObject *object)
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{
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PathView *self = PATH_VIEW (object);
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g_clear_pointer (&self->path, gsk_path_unref);
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g_clear_pointer (&self->stroke, gsk_stroke_free);
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g_clear_pointer (&self->line_path, gsk_path_unref);
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g_clear_pointer (&self->point_path, gsk_path_unref);
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G_OBJECT_CLASS (path_view_parent_class)->dispose (object);
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}
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static void
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path_view_get_property (GObject *object,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec)
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{
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PathView *self = PATH_VIEW (object);
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switch (prop_id)
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{
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case PROP_PATH:
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g_value_set_boxed (value, self->path);
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break;
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case PROP_DO_FILL:
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g_value_set_boolean (value, self->do_fill);
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break;
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case PROP_STROKE:
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g_value_set_boxed (value, self->stroke);
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break;
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case PROP_FILL_RULE:
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g_value_set_enum (value, self->fill_rule);
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break;
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case PROP_FG_COLOR:
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g_value_set_boxed (value, &self->fg);
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break;
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case PROP_BG_COLOR:
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g_value_set_boxed (value, &self->bg);
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break;
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case PROP_SHOW_POINTS:
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g_value_set_boolean (value, self->show_points);
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break;
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case PROP_SHOW_CONTROLS:
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g_value_set_boolean (value, self->show_controls);
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break;
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case PROP_POINT_COLOR:
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g_value_set_boxed (value, &self->point_color);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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update_bounds (PathView *self)
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{
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if (self->do_fill)
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gsk_path_get_bounds (self->path, &self->bounds);
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else
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gsk_path_get_stroke_bounds (self->path, self->stroke, &self->bounds);
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if (self->line_path)
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{
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graphene_rect_t bounds;
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gsk_path_get_stroke_bounds (self->line_path, self->stroke, &bounds);
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graphene_rect_union (&bounds, &self->bounds, &self->bounds);
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}
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if (self->point_path)
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{
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graphene_rect_t bounds;
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gsk_path_get_stroke_bounds (self->point_path, self->stroke, &bounds);
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graphene_rect_union (&bounds, &self->bounds, &self->bounds);
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}
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gtk_widget_queue_resize (GTK_WIDGET (self));
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}
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typedef struct
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{
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PathView *self;
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GskPathBuilder *line_builder;
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GskPathBuilder *point_builder;
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} ControlData;
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static gboolean
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collect_cb (GskPathOperation op,
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const graphene_point_t *pts,
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gsize n_pts,
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float weight,
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gpointer data)
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{
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ControlData *cd = data;
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switch (op)
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{
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case GSK_PATH_MOVE:
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if (cd->point_builder)
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gsk_path_builder_add_circle (cd->point_builder, &pts[0], 4);
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if (cd->line_builder)
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gsk_path_builder_move_to (cd->line_builder, pts[0].x, pts[0].y);
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break;
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case GSK_PATH_LINE:
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case GSK_PATH_CLOSE:
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if (cd->point_builder)
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gsk_path_builder_add_circle (cd->point_builder, &pts[1], 4);
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if (cd->line_builder)
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gsk_path_builder_line_to (cd->line_builder, pts[1].x, pts[1].y);
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break;
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case GSK_PATH_QUAD:
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case GSK_PATH_CONIC:
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if (cd->point_builder)
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{
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if (cd->self->show_controls)
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gsk_path_builder_add_circle (cd->point_builder, &pts[1], 3);
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gsk_path_builder_add_circle (cd->point_builder, &pts[2], 4);
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}
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if (cd->line_builder)
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{
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gsk_path_builder_line_to (cd->line_builder, pts[1].x, pts[1].y);
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gsk_path_builder_line_to (cd->line_builder, pts[2].x, pts[2].y);
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}
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break;
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case GSK_PATH_CUBIC:
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if (cd->point_builder)
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{
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if (cd->self->show_controls)
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{
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gsk_path_builder_add_circle (cd->point_builder, &pts[1], 3);
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gsk_path_builder_add_circle (cd->point_builder, &pts[2], 3);
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}
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gsk_path_builder_add_circle (cd->point_builder, &pts[3], 4);
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}
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if (cd->line_builder)
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{
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gsk_path_builder_line_to (cd->line_builder, pts[1].x, pts[1].y);
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gsk_path_builder_line_to (cd->line_builder, pts[2].x, pts[2].y);
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gsk_path_builder_line_to (cd->line_builder, pts[3].x, pts[3].y);
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}
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break;
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default:
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g_assert_not_reached ();
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}
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return TRUE;
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}
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static void
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update_controls (PathView *self)
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{
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ControlData data = { 0, };
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data.self = self;
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g_clear_pointer (&self->line_path, gsk_path_unref);
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g_clear_pointer (&self->point_path, gsk_path_unref);
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if (self->path && self->show_controls)
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data.line_builder = gsk_path_builder_new ();
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if (self->path && (self->show_points || self->show_controls))
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data.point_builder = gsk_path_builder_new ();
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if (data.line_builder || data.point_builder)
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{
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gsk_path_foreach (self->path, -1, collect_cb, &data);
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if (data.line_builder)
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self->line_path = gsk_path_builder_free_to_path (data.line_builder);
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if (data.point_builder)
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self->point_path = gsk_path_builder_free_to_path (data.point_builder);
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}
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update_bounds (self);
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}
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static void
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path_view_set_property (GObject *object,
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guint prop_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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PathView *self = PATH_VIEW (object);
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switch (prop_id)
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{
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case PROP_PATH:
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g_clear_pointer (&self->path, gsk_path_unref);
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self->path = g_value_dup_boxed (value);
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update_controls (self);
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break;
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case PROP_DO_FILL:
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self->do_fill = g_value_get_boolean (value);
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update_bounds (self);
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break;
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case PROP_STROKE:
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gsk_stroke_free (self->stroke);
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self->stroke = g_value_get_boxed (value);
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update_bounds (self);
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break;
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case PROP_FILL_RULE:
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self->fill_rule = g_value_get_enum (value);
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gtk_widget_queue_draw (GTK_WIDGET (self));
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break;
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case PROP_FG_COLOR:
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self->fg = *(GdkRGBA *) g_value_get_boxed (value);
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gtk_widget_queue_draw (GTK_WIDGET (self));
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break;
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case PROP_BG_COLOR:
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self->bg = *(GdkRGBA *) g_value_get_boxed (value);
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gtk_widget_queue_draw (GTK_WIDGET (self));
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break;
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case PROP_SHOW_POINTS:
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self->show_points = g_value_get_boolean (value);
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update_controls (self);
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break;
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case PROP_SHOW_CONTROLS:
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self->show_controls = g_value_get_boolean (value);
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update_controls (self);
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break;
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case PROP_POINT_COLOR:
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self->point_color = *(GdkRGBA *) g_value_get_boxed (value);
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gtk_widget_queue_draw (GTK_WIDGET (self));
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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path_view_measure (GtkWidget *widget,
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GtkOrientation orientation,
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int for_size,
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int *minimum,
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int *natural,
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int *minimum_baseline,
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int *natural_baseline)
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{
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PathView *self = PATH_VIEW (widget);
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if (orientation == GTK_ORIENTATION_HORIZONTAL)
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*minimum = *natural = (int) ceilf (self->bounds.size.width) + 2 * self->padding;
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else
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*minimum = *natural = (int) ceilf (self->bounds.size.height) + 2 * self->padding;
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}
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static void
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path_view_snapshot (GtkWidget *widget,
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GtkSnapshot *snapshot)
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{
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PathView *self = PATH_VIEW (widget);
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graphene_rect_t bounds = self->bounds;
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graphene_rect_inset (&bounds, - self->padding, - self->padding);
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gtk_snapshot_save (snapshot);
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gtk_snapshot_append_color (snapshot, &self->bg, &bounds);
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if (self->do_fill)
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gtk_snapshot_append_fill (snapshot, self->path, self->fill_rule, &self->fg);
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else
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gtk_snapshot_append_stroke (snapshot, self->path, self->stroke, &self->fg);
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if (self->line_path)
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{
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GskStroke *stroke = gsk_stroke_new (1);
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gsk_stroke_set_dash (stroke, (const float[]) { 1, 1 }, 2);
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gtk_snapshot_append_stroke (snapshot, self->line_path, stroke, &self->fg);
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}
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if (self->point_path)
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{
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GskStroke *stroke = gsk_stroke_new (1);
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gtk_snapshot_append_fill (snapshot, self->point_path, GSK_FILL_RULE_WINDING, &self->point_color);
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gtk_snapshot_append_stroke (snapshot, self->point_path, stroke, &self->fg);
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}
|
||
|
|
|
||
|
|
gtk_snapshot_restore (snapshot);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
path_view_class_init (PathViewClass *class)
|
||
|
|
{
|
||
|
|
GObjectClass *object_class = G_OBJECT_CLASS (class);
|
||
|
|
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
|
||
|
|
|
||
|
|
object_class->dispose = path_view_dispose;
|
||
|
|
object_class->get_property = path_view_get_property;
|
||
|
|
object_class->set_property = path_view_set_property;
|
||
|
|
|
||
|
|
widget_class->measure = path_view_measure;
|
||
|
|
widget_class->snapshot = path_view_snapshot;
|
||
|
|
|
||
|
|
properties[PROP_PATH]
|
||
|
|
= g_param_spec_boxed ("path", NULL, NULL,
|
||
|
|
GSK_TYPE_PATH,
|
||
|
|
G_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
|
||
|
|
|
||
|
|
properties[PROP_DO_FILL]
|
||
|
|
= g_param_spec_boolean ("do-fill", NULL, NULL,
|
||
|
|
TRUE,
|
||
|
|
G_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
|
||
|
|
|
||
|
|
properties[PROP_STROKE]
|
||
|
|
= g_param_spec_boxed ("stroke", NULL, NULL,
|
||
|
|
GSK_TYPE_STROKE,
|
||
|
|
G_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
|
||
|
|
|
||
|
|
properties[PROP_FILL_RULE]
|
||
|
|
= g_param_spec_enum ("fill-rule", NULL, NULL,
|
||
|
|
GSK_TYPE_FILL_RULE,
|
||
|
|
GSK_FILL_RULE_WINDING,
|
||
|
|
G_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
|
||
|
|
|
||
|
|
properties[PROP_FG_COLOR]
|
||
|
|
= g_param_spec_boxed ("fg-color", NULL, NULL,
|
||
|
|
GDK_TYPE_RGBA,
|
||
|
|
G_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
|
||
|
|
|
||
|
|
properties[PROP_BG_COLOR]
|
||
|
|
= g_param_spec_boxed ("bg-color", NULL, NULL,
|
||
|
|
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);
|
||
|
|
|
||
|
|
properties[PROP_POINT_COLOR]
|
||
|
|
= g_param_spec_boxed ("point-color", NULL, NULL,
|
||
|
|
GDK_TYPE_RGBA,
|
||
|
|
G_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
|
||
|
|
|
||
|
|
g_object_class_install_properties (object_class, N_PROPERTIES, properties);
|
||
|
|
}
|
||
|
|
|
||
|
|
GtkWidget *
|
||
|
|
path_view_new (GskPath *path)
|
||
|
|
{
|
||
|
|
return g_object_new (PATH_TYPE_VIEW,
|
||
|
|
"path", path,
|
||
|
|
NULL);
|
||
|
|
}
|