gimp/app/widgets/gimpdasheditor.c

525 lines
16 KiB
C

/* The GIMP -- an image manipulation program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimpdasheditor.c
* Copyright (C) 2003 Simon Budig <simon@gimp.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <gtk/gtk.h>
#include "libgimpmath/gimpmath.h"
#include "libgimpconfig/gimpconfig.h"
#include "widgets-types.h"
#include "core/gimpdashpattern.h"
#include "core/gimpstrokeoptions.h"
#include "gimpdasheditor.h"
#define MIN_WIDTH 64
#define MIN_HEIGHT 20
#define DEFAULT_N_SEGMENTS 24
enum
{
PROP_0,
PROP_STROKE_OPTIONS,
PROP_N_SEGMENTS,
PROP_LENGTH
};
static void gimp_dash_editor_class_init (GimpDashEditorClass *klass);
static void gimp_dash_editor_init (GimpDashEditor *editor);
static void gimp_dash_editor_finalize (GObject *object);
static void gimp_dash_editor_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void gimp_dash_editor_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static void gimp_dash_editor_size_request (GtkWidget *widget,
GtkRequisition *requisition);
static gboolean gimp_dash_editor_expose (GtkWidget *widget,
GdkEventExpose *event);
static gboolean gimp_dash_editor_button_press (GtkWidget *widget,
GdkEventButton *bevent);
static gboolean gimp_dash_editor_button_release (GtkWidget *widget,
GdkEventButton *bevent);
static gboolean gimp_dash_editor_motion_notify (GtkWidget *widget,
GdkEventMotion *bevent);
/* helper function */
static void update_segments_from_options (GimpDashEditor *editor);
static void update_options_from_segments (GimpDashEditor *editor);
static void update_blocksize (GimpDashEditor *editor);
static gint dash_x_to_index (GimpDashEditor *editor,
gint x);
static GtkDrawingAreaClass *parent_class = NULL;
GType
gimp_dash_editor_get_type (void)
{
static GType editor_type = 0;
if (! editor_type)
{
static const GTypeInfo editor_info =
{
sizeof (GimpDashEditorClass),
NULL, /* base_init */
NULL, /* base_finalize */
(GClassInitFunc) gimp_dash_editor_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GimpDashEditor),
0, /* n_preallocs */
(GInstanceInitFunc) gimp_dash_editor_init,
};
editor_type = g_type_register_static (GTK_TYPE_DRAWING_AREA,
"GimpDashEditor",
&editor_info, 0);
}
return editor_type;
}
static void
gimp_dash_editor_class_init (GimpDashEditorClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
parent_class = g_type_class_peek_parent (klass);
object_class->finalize = gimp_dash_editor_finalize;
object_class->get_property = gimp_dash_editor_get_property;
object_class->set_property = gimp_dash_editor_set_property;
widget_class->size_request = gimp_dash_editor_size_request;
widget_class->expose_event = gimp_dash_editor_expose;
widget_class->button_press_event = gimp_dash_editor_button_press;
widget_class->button_release_event = gimp_dash_editor_button_release;
widget_class->motion_notify_event = gimp_dash_editor_motion_notify;
g_object_class_install_property (object_class, PROP_STROKE_OPTIONS,
g_param_spec_object ("stroke-options",
NULL, NULL,
GIMP_TYPE_STROKE_OPTIONS,
G_PARAM_READWRITE |
G_PARAM_CONSTRUCT_ONLY));
g_object_class_install_property (object_class, PROP_N_SEGMENTS,
g_param_spec_int ("n-segments",
NULL, NULL,
2, 120, DEFAULT_N_SEGMENTS,
G_PARAM_READWRITE |
G_PARAM_CONSTRUCT));
g_object_class_install_property (object_class, PROP_LENGTH,
g_param_spec_double ("dash-length",
NULL, NULL,
0.0, 2000.0,
0.5 * DEFAULT_N_SEGMENTS,
G_PARAM_READWRITE |
G_PARAM_CONSTRUCT));
}
static void
gimp_dash_editor_init (GimpDashEditor *editor)
{
editor->segments = NULL;
editor->block_width = 6;
editor->block_height = 6;
editor->edit_mode = TRUE;
editor->edit_button_x0 = 0;
gtk_widget_add_events (GTK_WIDGET (editor),
GDK_BUTTON_PRESS_MASK |
GDK_BUTTON_RELEASE_MASK |
GDK_BUTTON1_MOTION_MASK);
}
static void
gimp_dash_editor_finalize (GObject *object)
{
GimpDashEditor *editor = GIMP_DASH_EDITOR (object);
if (editor->stroke_options)
{
g_object_unref (editor->stroke_options);
editor->stroke_options = NULL;
}
if (editor->segments)
{
g_free (editor->segments);
editor->segments = NULL;
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gimp_dash_editor_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
GimpDashEditor *editor = GIMP_DASH_EDITOR (object);
switch (property_id)
{
case PROP_STROKE_OPTIONS:
g_return_if_fail (editor->stroke_options == NULL);
editor->stroke_options = GIMP_STROKE_OPTIONS (g_value_dup_object (value));
g_signal_connect_object (editor->stroke_options, "notify::dash-info",
G_CALLBACK (update_segments_from_options),
editor, G_CONNECT_SWAPPED);
break;
case PROP_N_SEGMENTS:
editor->n_segments = g_value_get_int (value);
if (editor->segments)
g_free (editor->segments);
editor->segments = g_new0 (gboolean, editor->n_segments);
break;
case PROP_LENGTH:
editor->dash_length = g_value_get_double (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
update_segments_from_options (editor);
}
static void
gimp_dash_editor_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
GimpDashEditor *editor = GIMP_DASH_EDITOR (object);
switch (property_id)
{
case PROP_STROKE_OPTIONS:
g_value_set_object (value, editor->stroke_options);
break;
case PROP_N_SEGMENTS:
g_value_set_int (value, editor->n_segments);
break;
case PROP_LENGTH:
g_value_set_double (value, editor->dash_length);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_dash_editor_size_request (GtkWidget *widget,
GtkRequisition *requisition)
{
GimpDashEditor *editor = GIMP_DASH_EDITOR (widget);
requisition->width = MAX (editor->block_width * editor->n_segments + 20,
MIN_WIDTH);
requisition->height = MAX (editor->block_height + 10, MIN_HEIGHT);
}
static gboolean
gimp_dash_editor_expose (GtkWidget *widget,
GdkEventExpose *event)
{
GimpDashEditor *editor = GIMP_DASH_EDITOR (widget);
gint x, index, w, h;
update_blocksize (editor);
/* Draw the background */
gdk_draw_rectangle (widget->window,
widget->style->base_gc[GTK_STATE_NORMAL], TRUE,
0, 0,
widget->allocation.width,
widget->allocation.height);
w = editor->block_width;
h = editor->block_height;
editor->x0 = (widget->allocation.width - w * editor->n_segments) / 2;
editor->y0 = (widget->allocation.height - h) / 2;
x = editor->x0 % w;
if (x > 0)
x -= w;
for (; x < widget->allocation.width + w; x += w)
{
index = dash_x_to_index (editor, x);
if (x < editor->x0 || x >= editor->x0 + editor->n_segments * w)
{
if (editor->segments[index])
{
gdk_draw_rectangle (widget->window,
widget->style->text_aa_gc[GTK_STATE_NORMAL],
TRUE,
x, editor->y0,
w, h);
}
}
else
{
if (editor->segments[index])
{
gdk_draw_rectangle (widget->window,
widget->style->text_gc[GTK_STATE_NORMAL],
TRUE,
x, editor->y0,
w, h);
}
if (editor->n_segments % 4 == 0 &&
(index + 1) % (editor->n_segments / 4) == 0)
{
gdk_draw_line (widget->window,
widget->style->text_aa_gc[GTK_STATE_NORMAL],
x + w - 1, editor->y0 - 2,
x + w - 1, editor->y0 + h + 1);
}
else if (index % 2 == 1)
{
gdk_draw_line (widget->window,
widget->style->text_aa_gc[GTK_STATE_NORMAL],
x + w - 1, editor->y0 + 1,
x + w - 1, editor->y0 + h - 2);
}
else
{
gdk_draw_line (widget->window,
widget->style->text_aa_gc[GTK_STATE_NORMAL],
x + w - 1, editor->y0 + h / 2 - 1,
x + w - 1, editor->y0 + h / 2);
}
}
}
gdk_draw_line (widget->window,
widget->style->text_aa_gc[GTK_STATE_NORMAL],
editor->x0 - 1, editor->y0 - 1,
editor->x0 - 1, editor->y0 + h);
return FALSE;
}
static gboolean
gimp_dash_editor_button_press (GtkWidget *widget,
GdkEventButton *bevent)
{
GimpDashEditor *editor = GIMP_DASH_EDITOR (widget);
gint index;
if (bevent->button == 1 && bevent->type == GDK_BUTTON_PRESS)
{
gdk_pointer_grab (widget->window, FALSE,
GDK_BUTTON_RELEASE_MASK | GDK_BUTTON1_MOTION_MASK,
NULL, NULL, bevent->time);
index = dash_x_to_index (editor, bevent->x);
editor->edit_mode = ! editor->segments [index];
editor->edit_button_x0 = bevent->x;
editor->segments [index] = editor->edit_mode;
gtk_widget_queue_draw (widget);
}
return TRUE;
}
static gboolean
gimp_dash_editor_button_release (GtkWidget *widget,
GdkEventButton *bevent)
{
GimpDashEditor *editor = GIMP_DASH_EDITOR (widget);
if (bevent->button == 1)
{
gdk_display_pointer_ungrab (gtk_widget_get_display (GTK_WIDGET (editor)),
bevent->time);
update_options_from_segments (editor);
}
return TRUE;
}
static gboolean
gimp_dash_editor_motion_notify (GtkWidget *widget,
GdkEventMotion *mevent)
{
GimpDashEditor *editor = GIMP_DASH_EDITOR (widget);
gint x, index;
index = dash_x_to_index (editor, mevent->x);
editor->segments [index] = editor->edit_mode;
if (mevent->x > editor->edit_button_x0)
{
for (x = editor->edit_button_x0; x < mevent->x; x += editor->block_width)
{
index = dash_x_to_index (editor, x);
editor->segments[index] = editor->edit_mode;
}
}
if (mevent->x < editor->edit_button_x0)
{
for (x = editor->edit_button_x0; x > mevent->x; x -= editor->block_width)
{
index = dash_x_to_index (editor, x);
editor->segments[index] = editor->edit_mode;
}
}
gtk_widget_queue_draw (widget);
return TRUE;
}
GtkWidget *
gimp_dash_editor_new (GimpStrokeOptions *stroke_options)
{
g_return_val_if_fail (GIMP_IS_STROKE_OPTIONS (stroke_options), NULL);
return g_object_new (GIMP_TYPE_DASH_EDITOR,
"stroke-options", stroke_options,
NULL);
}
void
gimp_dash_editor_shift_right (GimpDashEditor *editor)
{
gboolean swap;
gint i;
g_return_if_fail (GIMP_IS_DASH_EDITOR (editor));
g_return_if_fail (editor->n_segments > 0);
swap = editor->segments[editor->n_segments - 1];
for (i = editor->n_segments - 1; i > 0; i--)
editor->segments[i] = editor->segments[i-1];
editor->segments[0] = swap;
update_options_from_segments (editor);
}
void
gimp_dash_editor_shift_left (GimpDashEditor *editor)
{
gboolean swap;
gint i;
g_return_if_fail (GIMP_IS_DASH_EDITOR (editor));
g_return_if_fail (editor->n_segments > 0);
swap = editor->segments[0];
for (i = 1; i < editor->n_segments; i++)
editor->segments[i-1] = editor->segments[i];
editor->segments[editor->n_segments - 1] = swap;
update_options_from_segments (editor);
}
static void
update_segments_from_options (GimpDashEditor *editor)
{
if (editor->stroke_options == NULL || editor->segments == NULL)
return;
g_return_if_fail (GIMP_IS_STROKE_OPTIONS (editor->stroke_options));
gtk_widget_queue_draw (GTK_WIDGET (editor));
gimp_dash_pattern_segments_set (editor->stroke_options->dash_info,
editor->segments, editor->n_segments);
}
static void
update_options_from_segments (GimpDashEditor *editor)
{
GArray *pattern = gimp_dash_pattern_from_segments (editor->segments,
editor->n_segments,
editor->dash_length);
gimp_stroke_options_set_dash_pattern (editor->stroke_options,
GIMP_DASH_CUSTOM, pattern);
}
static void
update_blocksize (GimpDashEditor *editor)
{
GtkWidget *widget = GTK_WIDGET (editor);
editor->block_height = 6;
editor->block_width = MAX (ROUND (editor->dash_length /
editor->n_segments * editor->block_height),
4);
editor->block_height = MIN (ROUND (((float) editor->block_width) *
editor->n_segments / editor->dash_length),
widget->allocation.height - 4);
}
static gint
dash_x_to_index (GimpDashEditor *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;
}