546 lines
17 KiB
C
546 lines
17 KiB
C
/* PIKA - Photo and Image Kooker Application
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* a rebranding of The GNU Image Manipulation Program (created with heckimp)
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* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
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*
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* Original copyright, applying to most contents (license remains unchanged):
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* pikadasheditor.c
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* Copyright (C) 2003 Simon Budig <simon@gimp.org>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <gegl.h>
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#include <gtk/gtk.h>
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#include "libpikabase/pikabase.h"
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#include "libpikamath/pikamath.h"
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#include "libpikaconfig/pikaconfig.h"
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#include "widgets-types.h"
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#include "core/pikadashpattern.h"
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#include "core/pikastrokeoptions.h"
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#include "pikadasheditor.h"
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#define MIN_WIDTH 64
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#define MIN_HEIGHT 20
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#define DEFAULT_N_SEGMENTS 24
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enum
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{
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PROP_0,
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PROP_STROKE_OPTIONS,
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PROP_N_SEGMENTS,
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PROP_LENGTH
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};
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static void pika_dash_editor_finalize (GObject *object);
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static void pika_dash_editor_set_property (GObject *object,
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guint property_id,
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const GValue *value,
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GParamSpec *pspec);
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static void pika_dash_editor_get_property (GObject *object,
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guint property_id,
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GValue *value,
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GParamSpec *pspec);
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static void pika_dash_editor_get_preferred_width (GtkWidget *widget,
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gint *minimum_width,
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gint *natural_width);
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static void pika_dash_editor_get_preferred_height (GtkWidget *widget,
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gint *minimum_height,
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gint *natural_height);
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static gboolean pika_dash_editor_draw (GtkWidget *widget,
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cairo_t *cr);
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static gboolean pika_dash_editor_button_press (GtkWidget *widget,
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GdkEventButton *bevent);
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static gboolean pika_dash_editor_button_release (GtkWidget *widget,
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GdkEventButton *bevent);
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static gboolean pika_dash_editor_motion_notify (GtkWidget *widget,
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GdkEventMotion *bevent);
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/* helper function */
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static void update_segments_from_options (PikaDashEditor *editor);
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static void update_options_from_segments (PikaDashEditor *editor);
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static void update_blocksize (PikaDashEditor *editor);
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static gint dash_x_to_index (PikaDashEditor *editor,
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gint x);
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G_DEFINE_TYPE (PikaDashEditor, pika_dash_editor, GTK_TYPE_DRAWING_AREA)
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#define parent_class pika_dash_editor_parent_class
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static void
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pika_dash_editor_class_init (PikaDashEditorClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
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object_class->finalize = pika_dash_editor_finalize;
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object_class->get_property = pika_dash_editor_get_property;
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object_class->set_property = pika_dash_editor_set_property;
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widget_class->get_preferred_width = pika_dash_editor_get_preferred_width;
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widget_class->get_preferred_height = pika_dash_editor_get_preferred_height;
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widget_class->draw = pika_dash_editor_draw;
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widget_class->button_press_event = pika_dash_editor_button_press;
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widget_class->button_release_event = pika_dash_editor_button_release;
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widget_class->motion_notify_event = pika_dash_editor_motion_notify;
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g_object_class_install_property (object_class, PROP_STROKE_OPTIONS,
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g_param_spec_object ("stroke-options",
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NULL, NULL,
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PIKA_TYPE_STROKE_OPTIONS,
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PIKA_PARAM_READWRITE |
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G_PARAM_CONSTRUCT_ONLY));
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g_object_class_install_property (object_class, PROP_N_SEGMENTS,
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g_param_spec_int ("n-segments",
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NULL, NULL,
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2, 120, DEFAULT_N_SEGMENTS,
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PIKA_PARAM_READWRITE |
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G_PARAM_CONSTRUCT));
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g_object_class_install_property (object_class, PROP_LENGTH,
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g_param_spec_double ("dash-length",
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NULL, NULL,
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0.0, 2000.0,
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0.5 * DEFAULT_N_SEGMENTS,
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PIKA_PARAM_READWRITE |
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G_PARAM_CONSTRUCT));
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}
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static void
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pika_dash_editor_init (PikaDashEditor *editor)
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{
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editor->segments = NULL;
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editor->block_width = 6;
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editor->block_height = 6;
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editor->edit_mode = TRUE;
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editor->edit_button_x0 = 0;
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gtk_widget_add_events (GTK_WIDGET (editor),
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GDK_BUTTON_PRESS_MASK |
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GDK_BUTTON_RELEASE_MASK |
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GDK_BUTTON1_MOTION_MASK);
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}
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static void
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pika_dash_editor_finalize (GObject *object)
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{
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PikaDashEditor *editor = PIKA_DASH_EDITOR (object);
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g_clear_object (&editor->stroke_options);
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g_clear_pointer (&editor->segments, g_free);
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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static void
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pika_dash_editor_set_property (GObject *object,
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guint property_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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PikaDashEditor *editor = PIKA_DASH_EDITOR (object);
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switch (property_id)
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{
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case PROP_STROKE_OPTIONS:
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g_return_if_fail (editor->stroke_options == NULL);
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editor->stroke_options = g_value_dup_object (value);
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g_signal_connect_object (editor->stroke_options, "notify::dash-info",
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G_CALLBACK (update_segments_from_options),
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editor, G_CONNECT_SWAPPED);
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break;
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case PROP_N_SEGMENTS:
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editor->n_segments = g_value_get_int (value);
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if (editor->segments)
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g_free (editor->segments);
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editor->segments = g_new0 (gboolean, editor->n_segments);
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break;
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case PROP_LENGTH:
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editor->dash_length = g_value_get_double (value);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
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break;
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}
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update_segments_from_options (editor);
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}
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static void
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pika_dash_editor_get_property (GObject *object,
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guint property_id,
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GValue *value,
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GParamSpec *pspec)
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{
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PikaDashEditor *editor = PIKA_DASH_EDITOR (object);
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switch (property_id)
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{
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case PROP_STROKE_OPTIONS:
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g_value_set_object (value, editor->stroke_options);
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break;
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case PROP_N_SEGMENTS:
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g_value_set_int (value, editor->n_segments);
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break;
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case PROP_LENGTH:
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g_value_set_double (value, editor->dash_length);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_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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pika_dash_editor_get_preferred_width (GtkWidget *widget,
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gint *minimum_width,
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gint *natural_width)
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{
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PikaDashEditor *editor = PIKA_DASH_EDITOR (widget);
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*minimum_width = *natural_width = MAX (editor->block_width *
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editor->n_segments + 20,
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MIN_WIDTH);
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}
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static void
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pika_dash_editor_get_preferred_height (GtkWidget *widget,
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gint *minimum_height,
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gint *natural_height)
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{
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PikaDashEditor *editor = PIKA_DASH_EDITOR (widget);
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*minimum_height = *natural_height = MAX (editor->block_height + 10,
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MIN_HEIGHT);
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}
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static gboolean
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pika_dash_editor_draw (GtkWidget *widget,
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cairo_t *cr)
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{
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PikaDashEditor *editor = PIKA_DASH_EDITOR (widget);
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GtkStyleContext *style = gtk_widget_get_style_context (widget);
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GtkAllocation allocation;
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GdkRGBA fg_color;
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GdkRGBA mid_color;
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gint x;
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gint w, h;
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gtk_widget_get_allocation (widget, &allocation);
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gtk_style_context_save (style);
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gtk_style_context_add_class (style, GTK_STYLE_CLASS_ENTRY);
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update_blocksize (editor);
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gtk_style_context_get_color (style,
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gtk_widget_get_state_flags (widget),
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&fg_color);
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mid_color = fg_color;
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mid_color.alpha *= 0.5;
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/* draw the background */
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gtk_render_background (style, cr,
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allocation.x, allocation.y,
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allocation.width, allocation.height);
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w = editor->block_width;
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h = editor->block_height;
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editor->x0 = (allocation.width - w * editor->n_segments) / 2;
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editor->y0 = (allocation.height - h) / 2;
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/* draw the dash segments */
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x = editor->x0 % w;
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if (x > 0)
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x -= w;
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for (; x < editor->x0; x += w)
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{
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gint index = dash_x_to_index (editor, x);
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if (editor->segments[index])
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cairo_rectangle (cr, x, editor->y0, w, h);
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}
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gdk_cairo_set_source_rgba (cr, &mid_color);
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cairo_fill (cr);
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for (; x < editor->x0 + editor->n_segments * w; x += w)
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{
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gint index = dash_x_to_index (editor, x);
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if (editor->segments[index])
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cairo_rectangle (cr, x, editor->y0, w, h);
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}
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gdk_cairo_set_source_rgba (cr, &fg_color);
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cairo_fill (cr);
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for (; x < allocation.width + w; x += w)
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{
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gint index = dash_x_to_index (editor, x);
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if (editor->segments[index])
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cairo_rectangle (cr, x, editor->y0, w, h);
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}
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gdk_cairo_set_source_rgba (cr, &mid_color);
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cairo_fill (cr);
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/* draw rulers */
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x = editor->x0 % w;
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if (x > 0)
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x -= w;
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for (; x < allocation.width + w; x += w)
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{
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gint index = dash_x_to_index (editor, x);
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if (editor->n_segments % 4 == 0 &&
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(index + 1) % (editor->n_segments / 4) == 0)
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{
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cairo_move_to (cr, x + w - 0.5, editor->y0 - 2);
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cairo_line_to (cr, x + w - 0.5, editor->y0 + h + 2);
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}
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else if (index % 2 == 1)
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{
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cairo_move_to (cr, x + w - 0.5, editor->y0 + 1);
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cairo_line_to (cr, x + w - 0.5, editor->y0 + h - 1);
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}
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else
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{
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cairo_move_to (cr, x + w - 0.5, editor->y0 + h / 2 - 1);
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cairo_line_to (cr, x + w - 0.5, editor->y0 + h / 2 + 1);
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}
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}
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cairo_move_to (cr, editor->x0 - 0.5, editor->y0 - 1);
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cairo_move_to (cr, editor->x0 - 0.5, editor->y0 + h);
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gdk_cairo_set_source_rgba (cr, &mid_color);
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cairo_set_line_width (cr, 1.0);
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cairo_stroke (cr);
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gtk_style_context_restore (style);
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return FALSE;
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}
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static gboolean
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pika_dash_editor_button_press (GtkWidget *widget,
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GdkEventButton *bevent)
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{
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PikaDashEditor *editor = PIKA_DASH_EDITOR (widget);
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gint index;
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if (bevent->button == 1 && bevent->type == GDK_BUTTON_PRESS)
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{
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gtk_grab_add (widget);
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index = dash_x_to_index (editor, bevent->x);
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editor->edit_mode = ! editor->segments [index];
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editor->edit_button_x0 = bevent->x;
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editor->segments [index] = editor->edit_mode;
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gtk_widget_queue_draw (widget);
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}
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return TRUE;
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}
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static gboolean
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pika_dash_editor_button_release (GtkWidget *widget,
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GdkEventButton *bevent)
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{
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PikaDashEditor *editor = PIKA_DASH_EDITOR (widget);
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if (bevent->button == 1)
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{
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gtk_grab_remove (widget);
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update_options_from_segments (editor);
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}
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return TRUE;
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}
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static gboolean
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pika_dash_editor_motion_notify (GtkWidget *widget,
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GdkEventMotion *mevent)
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{
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PikaDashEditor *editor = PIKA_DASH_EDITOR (widget);
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gint x, index;
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index = dash_x_to_index (editor, mevent->x);
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editor->segments [index] = editor->edit_mode;
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if (mevent->x > editor->edit_button_x0)
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{
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for (x = editor->edit_button_x0; x < mevent->x; x += editor->block_width)
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{
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index = dash_x_to_index (editor, x);
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editor->segments[index] = editor->edit_mode;
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}
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}
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if (mevent->x < editor->edit_button_x0)
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{
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for (x = editor->edit_button_x0; x > mevent->x; x -= editor->block_width)
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{
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index = dash_x_to_index (editor, x);
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editor->segments[index] = editor->edit_mode;
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}
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}
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gtk_widget_queue_draw (widget);
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return TRUE;
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}
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GtkWidget *
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pika_dash_editor_new (PikaStrokeOptions *stroke_options)
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{
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g_return_val_if_fail (PIKA_IS_STROKE_OPTIONS (stroke_options), NULL);
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return g_object_new (PIKA_TYPE_DASH_EDITOR,
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"stroke-options", stroke_options,
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NULL);
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}
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void
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pika_dash_editor_shift_right (PikaDashEditor *editor)
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{
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gboolean swap;
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gint i;
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g_return_if_fail (PIKA_IS_DASH_EDITOR (editor));
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g_return_if_fail (editor->n_segments > 0);
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swap = editor->segments[editor->n_segments - 1];
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for (i = editor->n_segments - 1; i > 0; i--)
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editor->segments[i] = editor->segments[i-1];
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editor->segments[0] = swap;
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update_options_from_segments (editor);
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}
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void
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pika_dash_editor_shift_left (PikaDashEditor *editor)
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{
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gboolean swap;
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gint i;
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g_return_if_fail (PIKA_IS_DASH_EDITOR (editor));
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g_return_if_fail (editor->n_segments > 0);
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swap = editor->segments[0];
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for (i = 1; i < editor->n_segments; i++)
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editor->segments[i-1] = editor->segments[i];
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editor->segments[editor->n_segments - 1] = swap;
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update_options_from_segments (editor);
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}
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static void
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update_segments_from_options (PikaDashEditor *editor)
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{
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GArray *dash_info;
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if (editor->stroke_options == NULL || editor->segments == NULL)
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return;
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g_return_if_fail (PIKA_IS_STROKE_OPTIONS (editor->stroke_options));
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gtk_widget_queue_draw (GTK_WIDGET (editor));
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dash_info = pika_stroke_options_get_dash_info (editor->stroke_options);
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pika_dash_pattern_fill_segments (dash_info,
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editor->segments, editor->n_segments);
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}
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static void
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update_options_from_segments (PikaDashEditor *editor)
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{
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GArray *pattern = pika_dash_pattern_new_from_segments (editor->segments,
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editor->n_segments,
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editor->dash_length);
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pika_stroke_options_take_dash_pattern (editor->stroke_options,
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PIKA_DASH_CUSTOM, pattern);
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}
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static void
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update_blocksize (PikaDashEditor *editor)
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{
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GtkWidget *widget = GTK_WIDGET (editor);
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GtkAllocation allocation;
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gtk_widget_get_allocation (widget, &allocation);
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editor->block_height = 6;
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editor->block_width = MAX (ROUND (editor->dash_length /
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editor->n_segments * editor->block_height),
|
|
4);
|
|
editor->block_height = MIN (ROUND (((float) editor->block_width) *
|
|
editor->n_segments / editor->dash_length),
|
|
allocation.height - 4);
|
|
}
|
|
|
|
static gint
|
|
dash_x_to_index (PikaDashEditor *editor,
|
|
gint x)
|
|
{
|
|
gint index = x - editor->x0;
|
|
|
|
while (index < 0)
|
|
index += editor->n_segments * editor->block_width;
|
|
|
|
index = (index / editor->block_width) % editor->n_segments;
|
|
|
|
return index;
|
|
}
|
