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gimp/libgimp/gimpbrushmenu.c

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/* LIBGIMP - The GIMP Library
* Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
*
* gimpbrushmenu.c
* Copyright (C) 1998 Andy Thomas
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; 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>
#ifdef __GNUC__
#warning GTK_DISABLE_DEPRECATED
#endif
#undef GTK_DISABLE_DEPRECATED
#include "gimp.h"
#include "gimpui.h"
#include "libgimp-intl.h"
#define BRUSH_SELECT_DATA_KEY "gimp-brush-select-data"
#define CELL_SIZE 20
typedef struct _BrushSelect BrushSelect;
struct _BrushSelect
{
gchar *title;
GimpRunBrushCallback callback;
gpointer data;
GtkWidget *preview;
GtkWidget *button;
GtkWidget *popup;
gchar *brush_name; /* Local copy */
gdouble opacity;
gint spacing;
GimpLayerModeEffects paint_mode;
gint width;
gint height;
guchar *mask_data; /* local copy */
const gchar *temp_brush_callback;
};
/* local function prototypes */
static void gimp_brush_select_widget_callback (const gchar *name,
gdouble opacity,
gint spacing,
GimpLayerModeEffects paint_mode,
gint width,
gint height,
const guchar *mask_data,
gboolean closing,
gpointer data);
static void gimp_brush_select_widget_clicked (GtkWidget *widget,
BrushSelect *brush_sel);
static void gimp_brush_select_widget_destroy (GtkWidget *widget,
BrushSelect *brush_sel);
static gboolean gimp_brush_select_preview_events (GtkWidget *widget,
GdkEvent *event,
BrushSelect *brush_sel);
static void gimp_brush_select_preview_update (GtkWidget *preview,
gint brush_width,
gint brush_height,
const guchar *mask_data);
static void gimp_brush_select_popup_open (BrushSelect *brush_sel,
gint x,
gint y);
static void gimp_brush_select_popup_close (BrushSelect *brush_sel);
/**
* gimp_brush_select_widget_new:
* @title: Title of the dialog to use or %NULL to use the default title.
* @brush_name: Initial brush name or %NULL to use current selection.
* @opacity: Initial opacity. -1 means to use current opacity.
* @spacing: Initial spacing. -1 means to use current spacing.
* @paint_mode: Initial paint mode. -1 means to use current paint mode.
* @callback: A function to call when the selected brush changes.
* @data: A pointer to arbitary data to be used in the call to @callback.
*
* Creates a new #GtkWidget that completely controls the selection of
* a #GimpBrush. This widget is suitable for placement in a table in
* a plug-in dialog.
*
* Returns: A #GtkWidget that you can use in your UI.
*/
GtkWidget *
gimp_brush_select_widget_new (const gchar *title,
const gchar *brush_name,
gdouble opacity,
gint spacing,
GimpLayerModeEffects paint_mode,
GimpRunBrushCallback callback,
gpointer data)
{
BrushSelect *brush_sel;
GtkWidget *frame;
GtkWidget *hbox;
gint init_spacing;
GimpLayerModeEffects init_paint_mode;
gdouble init_opacity;
gint mask_data_size;
g_return_val_if_fail (callback != NULL, NULL);
if (! title)
title = _("Brush Selection");
brush_sel = g_new0 (BrushSelect, 1);
brush_sel->title = g_strdup (title);
brush_sel->callback = callback;
brush_sel->data = data;
hbox = gtk_hbox_new (FALSE, 4);
frame = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME(frame), GTK_SHADOW_OUT);
gtk_box_pack_start (GTK_BOX (hbox), frame, TRUE, TRUE, 0);
gtk_widget_show (frame);
brush_sel->preview = gtk_preview_new (GTK_PREVIEW_GRAYSCALE);
gtk_widget_set_events (brush_sel->preview,
GDK_EXPOSURE_MASK |
GDK_BUTTON_PRESS_MASK |
GDK_BUTTON_RELEASE_MASK |
GDK_BUTTON1_MOTION_MASK);
gtk_preview_size (GTK_PREVIEW (brush_sel->preview), CELL_SIZE, CELL_SIZE);
gtk_container_add (GTK_CONTAINER (frame), brush_sel->preview);
gtk_widget_show (brush_sel->preview);
g_signal_connect (brush_sel->preview, "event",
G_CALLBACK (gimp_brush_select_preview_events),
brush_sel);
brush_sel->button = gtk_button_new_with_label (" ... ");
gtk_box_pack_end (GTK_BOX (hbox), brush_sel->button, FALSE, FALSE, 0);
gtk_widget_show (brush_sel->button);
g_signal_connect (brush_sel->button, "clicked",
G_CALLBACK (gimp_brush_select_widget_clicked),
brush_sel);
g_signal_connect (brush_sel->button, "destroy",
G_CALLBACK (gimp_brush_select_widget_destroy),
brush_sel);
/* Do initial brush setup */
brush_sel->brush_name = gimp_brushes_get_brush_data (brush_name,
&init_opacity,
&init_spacing,
&init_paint_mode,
&brush_sel->width,
&brush_sel->height,
&mask_data_size,
&brush_sel->mask_data);
if (brush_sel->brush_name)
{
brush_sel->opacity = (opacity == -1.0) ? init_opacity : opacity;
brush_sel->spacing = (spacing == -1) ? init_spacing : spacing;
brush_sel->paint_mode = (paint_mode == -1) ? init_paint_mode : paint_mode;
gimp_brush_select_preview_update (brush_sel->preview,
brush_sel->width,
brush_sel->height,
brush_sel->mask_data);
}
g_object_set_data (G_OBJECT (hbox), BRUSH_SELECT_DATA_KEY, brush_sel);
return hbox;
}
/**
* gimp_brush_select_widget_close:
* @widget: A brush select widget.
*
* Closes the popup window associated with @widget.
*/
void
gimp_brush_select_widget_close (GtkWidget *widget)
{
BrushSelect *brush_sel;
brush_sel = g_object_get_data (G_OBJECT (widget), BRUSH_SELECT_DATA_KEY);
g_return_if_fail (brush_sel != NULL);
if (brush_sel->temp_brush_callback)
{
gimp_brush_select_destroy (brush_sel->temp_brush_callback);
brush_sel->temp_brush_callback = NULL;
}
}
/**
* gimp_brush_select_widget_set;
* @widget: A brush select widget.
* @brush_name: Brush name to set; %NULL means no change.
* @opacity: Opacity to set. -1 means no change.
* @spacing: Spacing to set. -1 means no change.
* @paint_mode: Paint mode to set. -1 means no change.
*
* Sets the current brush and other values for the brush select
* widget. Calls the callback function if one was supplied in the
* call to gimp_brush_select_widget_new().
*/
void
gimp_brush_select_widget_set (GtkWidget *widget,
const gchar *brush_name,
gdouble opacity,
gint spacing,
GimpLayerModeEffects paint_mode)
{
BrushSelect *brush_sel;
brush_sel = g_object_get_data (G_OBJECT (widget), BRUSH_SELECT_DATA_KEY);
g_return_if_fail (brush_sel != NULL);
if (brush_sel->temp_brush_callback)
{
gimp_brushes_set_popup (brush_sel->temp_brush_callback,
brush_name, opacity, spacing, paint_mode);
}
else
{
gint width;
gint height;
gint init_spacing;
GimpLayerModeEffects init_paint_mode;
gdouble init_opacity;
gint mask_data_size;
guint8 *mask_data;
gchar *name;
name = gimp_brushes_get_brush_data (brush_name,
&init_opacity,
&init_spacing,
&init_paint_mode,
&width,
&height,
&mask_data_size,
&mask_data);
if (name)
{
if (opacity == -1.0) opacity = init_opacity;
if (spacing == -1) spacing = init_spacing;
if (paint_mode == -1) paint_mode = init_paint_mode;
gimp_brush_select_widget_callback (brush_name, opacity, spacing,
paint_mode, width, height,
mask_data, FALSE, brush_sel);
g_free (name);
g_free (mask_data);
}
}
}
/* private functions */
static void
gimp_brush_select_widget_callback (const gchar *name,
gdouble opacity,
gint spacing,
GimpLayerModeEffects paint_mode,
gint width,
gint height,
const guchar *mask_data,
gboolean closing,
gpointer data)
{
BrushSelect *brush_sel = (BrushSelect *) data;
g_free (brush_sel->brush_name);
g_free (brush_sel->mask_data);
brush_sel->brush_name = g_strdup (name);
brush_sel->width = width;
brush_sel->height = height;
brush_sel->mask_data = g_memdup (mask_data, width * height);
brush_sel->opacity = opacity;
brush_sel->spacing = spacing;
brush_sel->paint_mode = paint_mode;
gimp_brush_select_preview_update (brush_sel->preview,
width, height, mask_data);
if (brush_sel->callback)
brush_sel->callback (name, opacity, spacing, paint_mode,
width, height, mask_data, closing, brush_sel->data);
if (closing)
brush_sel->temp_brush_callback = NULL;
}
static void
gimp_brush_select_widget_clicked (GtkWidget *widget,
BrushSelect *brush_sel)
{
if (brush_sel->temp_brush_callback)
{
/* calling gimp_brushes_set_popup() raises the dialog */
gimp_brushes_set_popup (brush_sel->temp_brush_callback,
brush_sel->brush_name,
brush_sel->opacity,
brush_sel->spacing,
brush_sel->paint_mode);
}
else
{
brush_sel->temp_brush_callback =
gimp_brush_select_new (brush_sel->title,
brush_sel->brush_name,
brush_sel->opacity,
brush_sel->spacing,
brush_sel->paint_mode,
gimp_brush_select_widget_callback,
brush_sel);
}
}
static void
gimp_brush_select_widget_destroy (GtkWidget *widget,
BrushSelect *brush_sel)
{
if (brush_sel->temp_brush_callback)
{
gimp_brush_select_destroy (brush_sel->temp_brush_callback);
brush_sel->temp_brush_callback = NULL;
}
g_free (brush_sel->title);
g_free (brush_sel->brush_name);
g_free (brush_sel->mask_data);
g_free (brush_sel);
}
static gboolean
gimp_brush_select_preview_events (GtkWidget *widget,
GdkEvent *event,
BrushSelect *brush_sel)
{
GdkEventButton *bevent;
if (brush_sel->mask_data)
{
switch (event->type)
{
case GDK_BUTTON_PRESS:
bevent = (GdkEventButton *) event;
if (bevent->button == 1)
{
gtk_grab_add (widget);
gimp_brush_select_popup_open (brush_sel, bevent->x, bevent->y);
}
break;
case GDK_BUTTON_RELEASE:
bevent = (GdkEventButton *) event;
if (bevent->button == 1)
{
gtk_grab_remove (widget);
gimp_brush_select_popup_close (brush_sel);
}
break;
default:
break;
}
}
return FALSE;
}
static void
gimp_brush_select_preview_update (GtkWidget *preview,
gint brush_width,
gint brush_height,
const guchar *mask_data)
{
guchar *buf;
guchar *b;
const guchar *src;
const guchar *s;
gint i, y;
gint offset_x, offset_y;
gint ystart, yend;
gint width, height;
/* Draw the brush */
buf = g_new (guchar, CELL_SIZE);
/* Set buffer to white */
memset (buf, 255, CELL_SIZE);
for (i = 0; i < CELL_SIZE; i++)
gtk_preview_draw_row (GTK_PREVIEW (preview),
buf, 0, i, CELL_SIZE);
/* Limit to cell size */
width = (brush_width > CELL_SIZE) ? CELL_SIZE: brush_width;
height = (brush_height > CELL_SIZE) ? CELL_SIZE: brush_height;
offset_x = ((CELL_SIZE - width) / 2);
offset_y = ((CELL_SIZE - height) / 2);
ystart = CLAMP (offset_y, 0, CELL_SIZE);
yend = CLAMP (offset_y + height, 0, CELL_SIZE);
src = mask_data;
for (y = ystart; y < yend; y++)
{
gint j;
s = src;
b = buf;
for (j = 0; j < width ; j++)
*b++ = 255 - *s++;
gtk_preview_draw_row (GTK_PREVIEW (preview),
buf, offset_x, y, width);
src += brush_width;
}
g_free (buf);
gtk_widget_queue_draw (preview);
}
static void
gimp_brush_select_popup_open (BrushSelect *brush_sel,
gint x,
gint y)
{
GtkWidget *frame;
GtkWidget *preview;
const guchar *src;
const guchar *s;
guchar *buf;
guchar *b;
gint x_org;
gint y_org;
gint scr_w;
gint scr_h;
if (brush_sel->popup)
gimp_brush_select_popup_close (brush_sel);
if (brush_sel->width <= CELL_SIZE && brush_sel->height <= CELL_SIZE)
return;
brush_sel->popup = gtk_window_new (GTK_WINDOW_POPUP);
frame = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_OUT);
gtk_container_add (GTK_CONTAINER (brush_sel->popup), frame);
gtk_widget_show (frame);
preview = gtk_preview_new (GTK_PREVIEW_GRAYSCALE);
gtk_preview_size (GTK_PREVIEW (preview),
brush_sel->width, brush_sel->height);
gtk_container_add (GTK_CONTAINER (frame), preview);
gtk_widget_show (preview);
/* decide where to put the popup */
gdk_window_get_origin (brush_sel->preview->window, &x_org, &y_org);
scr_w = gdk_screen_width ();
scr_h = gdk_screen_height ();
x = x_org + x - (brush_sel->width / 2);
y = y_org + y - (brush_sel->height / 2);
x = (x < 0) ? 0 : x;
y = (y < 0) ? 0 : y;
x = (x + brush_sel->width > scr_w) ? scr_w - brush_sel->width : x;
y = (y + brush_sel->height > scr_h) ? scr_h - brush_sel->height : y;
gtk_window_move (GTK_WINDOW (brush_sel->popup), x, y);
/* Draw the brush */
buf = g_new (guchar, brush_sel->width);
memset (buf, 255, brush_sel->width);
src = brush_sel->mask_data;
for (y = 0; y < brush_sel->height; y++)
{
int j;
s = src;
b = buf;
for (j = 0; j < brush_sel->width ; j++)
*b++ = 255 - *s++;
gtk_preview_draw_row (GTK_PREVIEW (preview), buf,
0, y, brush_sel->width);
src += brush_sel->width;
}
g_free (buf);
gtk_widget_show (brush_sel->popup);
}
static void
gimp_brush_select_popup_close (BrushSelect *brush_sel)
{
if (brush_sel->popup)
{
gtk_widget_destroy (brush_sel->popup);
brush_sel->popup = NULL;
}
}
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