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gimp/app/gui/brush-editor.c

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/* The GIMP -- an image manipulation program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* brush-editor.c
* Copyright 1998 Jay Cox <jaycox@earthlink.net>
*
* 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 <string.h>
#include <gtk/gtk.h>
#include "libgimpmath/gimpmath.h"
#include "libgimpwidgets/gimpwidgets.h"
#include "core/core-types.h"
#include "base/temp-buf.h"
#include "core/gimpbrushgenerated.h"
#include "brush-editor.h"
#include "libgimp/gimpintl.h"
struct _BrushEditor
{
GtkWidget *shell;
GtkWidget *frame;
GtkWidget *preview;
GtkWidget *scale_label;
GtkWidget *options_box;
GtkWidget *name;
GtkAdjustment *radius_data;
GtkAdjustment *hardness_data;
GtkAdjustment *angle_data;
GtkAdjustment *aspect_ratio_data;
/* Brush preview */
GtkWidget *brush_preview;
GimpBrushGenerated *brush;
gint scale;
};
static void brush_editor_close_callback (GtkWidget *widget,
gpointer data);
static void brush_editor_name_activate (GtkWidget *widget,
BrushEditor *brush_editor);
static gboolean brush_editor_name_focus_out (GtkWidget *widget,
GdkEventFocus *fevent,
BrushEditor *brush_editor);
static void brush_editor_update_brush (GtkAdjustment *adjustment,
BrushEditor *brush_editor);
static void brush_editor_preview_resize (GtkWidget *widget,
GtkAllocation *allocation,
BrushEditor *brush_editor);
static void brush_editor_clear_preview (BrushEditor *brush_editor);
static void brush_editor_brush_dirty (GimpBrush *brush,
BrushEditor *brush_editor);
static void brush_editor_brush_name_changed (GtkWidget *widget,
BrushEditor *brush_editor);
/* public functions */
BrushEditor *
brush_editor_new (Gimp *gimp)
{
BrushEditor *brush_editor;
GtkWidget *vbox;
GtkWidget *slider;
GtkWidget *table;
brush_editor = g_new0 (BrushEditor, 1);
brush_editor->shell =
gimp_dialog_new (_("Brush Editor"), "generated_brush_editor",
gimp_standard_help_func,
"dialogs/brush_editor.html",
GTK_WIN_POS_NONE,
FALSE, TRUE, FALSE,
"_delete_event_", brush_editor_close_callback,
brush_editor, NULL, NULL, TRUE, TRUE,
NULL);
gtk_dialog_set_has_separator (GTK_DIALOG (brush_editor->shell), FALSE);
gtk_widget_hide (GTK_DIALOG (brush_editor->shell)->action_area);
vbox = gtk_vbox_new (FALSE, 1);
gtk_container_set_border_width (GTK_CONTAINER (vbox), 4);
gtk_container_add (GTK_CONTAINER (GTK_DIALOG (brush_editor->shell)->vbox),
vbox);
/* Brush's name */
brush_editor->name = gtk_entry_new ();
gtk_box_pack_start (GTK_BOX (vbox), brush_editor->name, FALSE, FALSE, 0);
gtk_widget_show (brush_editor->name);
g_signal_connect (G_OBJECT (brush_editor->name), "activate",
G_CALLBACK (brush_editor_name_activate),
brush_editor);
g_signal_connect (G_OBJECT (brush_editor->name), "focus_out_event",
G_CALLBACK (brush_editor_name_focus_out),
brush_editor);
/* brush's preview widget w/frame */
brush_editor->frame = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (brush_editor->frame), GTK_SHADOW_IN);
gtk_box_pack_start (GTK_BOX (vbox), brush_editor->frame, TRUE, TRUE, 0);
gtk_widget_show (brush_editor->frame);
brush_editor->preview = gtk_preview_new (GTK_PREVIEW_GRAYSCALE);
gtk_preview_size (GTK_PREVIEW (brush_editor->preview), 125, 100);
/* Enable auto-resizing of the preview but ensure a minimal size */
gtk_widget_set_usize (brush_editor->preview, 125, 100);
gtk_preview_set_expand (GTK_PREVIEW (brush_editor->preview), TRUE);
gtk_container_add (GTK_CONTAINER (brush_editor->frame), brush_editor->preview);
gtk_widget_show (brush_editor->preview);
g_signal_connect_after (G_OBJECT (brush_editor->frame), "size_allocate",
G_CALLBACK (brush_editor_preview_resize),
brush_editor);
/* table for sliders/labels */
brush_editor->scale_label = gtk_label_new ("-1:1");
gtk_box_pack_start (GTK_BOX (vbox), brush_editor->scale_label,
FALSE, FALSE, 0);
gtk_widget_show (brush_editor->scale_label);
brush_editor->scale = -1;
/* table for sliders/labels */
table = gtk_table_new (4, 2, FALSE);
gtk_box_pack_start (GTK_BOX (vbox), table, FALSE, FALSE, 0);
/* brush radius scale */
brush_editor->radius_data =
GTK_ADJUSTMENT (gtk_adjustment_new (10.0, 0.0, 100.0, 0.1, 1.0, 0.0));
slider = gtk_hscale_new (brush_editor->radius_data);
gtk_scale_set_value_pos (GTK_SCALE (slider), GTK_POS_TOP);
gtk_range_set_update_policy (GTK_RANGE (slider), GTK_UPDATE_DELAYED);
g_signal_connect (G_OBJECT (brush_editor->radius_data), "value_changed",
G_CALLBACK (brush_editor_update_brush),
brush_editor);
gimp_table_attach_aligned (GTK_TABLE (table), 0, 0,
_("Radius:"), 1.0, 1.0,
slider, 1, FALSE);
/* brush hardness scale */
brush_editor->hardness_data =
GTK_ADJUSTMENT (gtk_adjustment_new (0.0, 0.0, 1.0, 0.01, 0.01, 0.0));
slider = gtk_hscale_new (brush_editor->hardness_data);
gtk_scale_set_value_pos (GTK_SCALE (slider), GTK_POS_TOP);
gtk_range_set_update_policy (GTK_RANGE (slider), GTK_UPDATE_DELAYED);
g_signal_connect (G_OBJECT (brush_editor->hardness_data), "value_changed",
G_CALLBACK (brush_editor_update_brush),
brush_editor);
gimp_table_attach_aligned (GTK_TABLE (table), 0, 1,
_("Hardness:"), 1.0, 1.0,
slider, 1, FALSE);
/* brush aspect ratio scale */
brush_editor->aspect_ratio_data =
GTK_ADJUSTMENT (gtk_adjustment_new (1.0, 1.0, 20.0, 0.1, 1.0, 0.0));
slider = gtk_hscale_new (brush_editor->aspect_ratio_data);
gtk_scale_set_value_pos (GTK_SCALE (slider), GTK_POS_TOP);
gtk_range_set_update_policy (GTK_RANGE (slider), GTK_UPDATE_DELAYED);
g_signal_connect (G_OBJECT (brush_editor->aspect_ratio_data),"value_changed",
G_CALLBACK (brush_editor_update_brush),
brush_editor);
gimp_table_attach_aligned (GTK_TABLE (table), 0, 3,
_("Aspect Ratio:"), 1.0, 1.0,
slider, 1, FALSE);
/* brush angle scale */
brush_editor->angle_data =
GTK_ADJUSTMENT (gtk_adjustment_new (00.0, 0.0, 180.0, 0.1, 1.0, 0.0));
slider = gtk_hscale_new (brush_editor->angle_data);
gtk_scale_set_value_pos (GTK_SCALE (slider), GTK_POS_TOP);
gtk_range_set_update_policy (GTK_RANGE (slider), GTK_UPDATE_DELAYED);
g_signal_connect (G_OBJECT (brush_editor->angle_data), "value_changed",
G_CALLBACK (brush_editor_update_brush),
brush_editor);
gimp_table_attach_aligned (GTK_TABLE (table), 0, 2,
_("Angle:"), 1.0, 1.0,
slider, 1, FALSE);
gtk_table_set_row_spacings (GTK_TABLE (table), 3);
gtk_table_set_col_spacing (GTK_TABLE (table), 0, 4);
gtk_widget_show (table);
gtk_widget_show (vbox);
gtk_widget_show (brush_editor->shell);
return brush_editor;
}
void
brush_editor_set_brush (BrushEditor *brush_editor,
GimpBrush *gbrush)
{
GimpBrushGenerated *brush = NULL;
g_return_if_fail (brush_editor != NULL);
g_return_if_fail (GIMP_IS_BRUSH_GENERATED (gbrush));
if (brush_editor->brush)
{
g_signal_handlers_disconnect_by_func (G_OBJECT (brush_editor->brush),
brush_editor_brush_dirty,
brush_editor);
g_signal_handlers_disconnect_by_func (G_OBJECT (brush_editor->brush),
brush_editor_brush_name_changed,
brush_editor);
g_object_unref (G_OBJECT (brush_editor->brush));
brush_editor->brush = NULL;
}
brush = GIMP_BRUSH_GENERATED (gbrush);
g_signal_connect (G_OBJECT (brush), "invalidate_preview",
G_CALLBACK (brush_editor_brush_dirty),
brush_editor);
g_signal_connect (G_OBJECT (brush), "name_changed",
G_CALLBACK (brush_editor_brush_name_changed),
brush_editor);
gtk_adjustment_set_value (GTK_ADJUSTMENT (brush_editor->radius_data),
gimp_brush_generated_get_radius (brush));
gtk_adjustment_set_value (GTK_ADJUSTMENT (brush_editor->hardness_data),
gimp_brush_generated_get_hardness (brush));
gtk_adjustment_set_value (GTK_ADJUSTMENT (brush_editor->angle_data),
gimp_brush_generated_get_angle (brush));
gtk_adjustment_set_value (GTK_ADJUSTMENT (brush_editor->aspect_ratio_data),
gimp_brush_generated_get_aspect_ratio (brush));
gtk_entry_set_text (GTK_ENTRY (brush_editor->name),
gimp_object_get_name (GIMP_OBJECT (gbrush)));
brush_editor->brush = brush;
g_object_ref (G_OBJECT (brush_editor->brush));
brush_editor_brush_dirty (GIMP_BRUSH (brush), brush_editor);
}
/* private functions */
static void
brush_editor_close_callback (GtkWidget *widget,
gpointer data)
{
BrushEditor *brush_editor = (BrushEditor *) data;
if (GTK_WIDGET_VISIBLE (brush_editor->shell))
gtk_widget_hide (brush_editor->shell);
}
static void
brush_editor_name_activate (GtkWidget *widget,
BrushEditor *brush_editor)
{
const gchar *entry_text;
entry_text = gtk_entry_get_text (GTK_ENTRY (widget));
gimp_object_set_name (GIMP_OBJECT (brush_editor->brush), entry_text);
}
static gboolean
brush_editor_name_focus_out (GtkWidget *widget,
GdkEventFocus *fevent,
BrushEditor *brush_editor)
{
brush_editor_name_activate (widget, brush_editor);
return FALSE;
}
static void
brush_editor_update_brush (GtkAdjustment *adjustment,
BrushEditor *brush_editor)
{
if (brush_editor->brush &&
((brush_editor->radius_data->value
!= gimp_brush_generated_get_radius (brush_editor->brush))
|| (brush_editor->hardness_data->value
!= gimp_brush_generated_get_hardness (brush_editor->brush))
|| (brush_editor->aspect_ratio_data->value
!= gimp_brush_generated_get_aspect_ratio (brush_editor->brush))
|| (brush_editor->angle_data->value
!= gimp_brush_generated_get_angle (brush_editor->brush))))
{
gimp_brush_generated_freeze (brush_editor->brush);
gimp_brush_generated_set_radius (brush_editor->brush,
brush_editor->radius_data->value);
gimp_brush_generated_set_hardness (brush_editor->brush,
brush_editor->hardness_data->value);
gimp_brush_generated_set_aspect_ratio (brush_editor->brush,
brush_editor->aspect_ratio_data->value);
gimp_brush_generated_set_angle (brush_editor->brush,
brush_editor->angle_data->value);
gimp_brush_generated_thaw (brush_editor->brush);
}
}
static void
brush_editor_preview_resize (GtkWidget *widget,
GtkAllocation *allocation,
BrushEditor *brush_editor)
{
if (brush_editor->brush)
brush_editor_brush_dirty (GIMP_BRUSH (brush_editor->brush), brush_editor);
}
static void
brush_editor_clear_preview (BrushEditor *brush_editor)
{
guchar *buf;
gint i;
buf = g_new (guchar, brush_editor->preview->allocation.width);
/* Set the buffer to white */
memset (buf, 255, brush_editor->preview->allocation.width);
/* Set the image buffer to white */
for (i = 0; i < brush_editor->preview->allocation.height; i++)
gtk_preview_draw_row (GTK_PREVIEW (brush_editor->preview), buf, 0, i,
brush_editor->preview->allocation.width);
g_free (buf);
}
static void
brush_editor_brush_dirty (GimpBrush *brush,
BrushEditor *brush_editor)
{
gint x, y, width, yend, ystart, xo;
gint scale;
guchar *src, *buf;
brush_editor_clear_preview (brush_editor);
if (brush == NULL || brush->mask == NULL)
return;
scale = MAX (ceil (brush->mask->width/
(float) brush_editor->preview->allocation.width),
ceil (brush->mask->height/
(float) brush_editor->preview->allocation.height));
ystart = 0;
xo = brush_editor->preview->allocation.width / 2 - brush->mask->width / (2 * scale);
ystart = brush_editor->preview->allocation.height / 2 - brush->mask->height / (2 * scale);
yend = ystart + brush->mask->height / scale;
width = CLAMP (brush->mask->width/scale, 0, brush_editor->preview->allocation.width);
buf = g_new (guchar, width);
src = (guchar *) temp_buf_data (brush->mask);
for (y = ystart; y < yend; y++)
{
/* Invert the mask for display.
*/
for (x = 0; x < width; x++)
buf[x] = 255 - src[x * scale];
gtk_preview_draw_row (GTK_PREVIEW (brush_editor->preview), buf,
xo, y, width);
src += brush->mask->width * scale;
}
g_free (buf);
if (brush_editor->scale != scale)
{
gchar str[255];
brush_editor->scale = scale;
g_snprintf (str, sizeof (str), "%d:1", scale);
gtk_label_set_text (GTK_LABEL (brush_editor->scale_label), str);
}
gtk_widget_queue_draw (brush_editor->preview);
}
static void
brush_editor_brush_name_changed (GtkWidget *widget,
BrushEditor *brush_editor)
{
gtk_entry_set_text (GTK_ENTRY (brush_editor->name),
gimp_object_get_name (GIMP_OBJECT (brush_editor->brush)));
}
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