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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 <string.h>
#include "gimp.h"
#include "gimpui.h"
/* Idea is to have a function to call that returns a widget that
* completely controls the selection of a brush.
* you get a widget returned that you can use in a table say.
* In:- Initial brush name. Null means use current selection.
* pointer to func to call when brush changes (GimpRunBrushCallback).
* Returned:- Pointer to a widget that you can use in UI.
*
* Widget simply made up of a preview widget (20x20) containing the brush mask
* and a button that can be clicked on to change the brush.
*/
#define BSEL_DATA_KEY "__bsel_data"
#define CELL_SIZE 20
#define BRUSH_EVENT_MASK GDK_EXPOSURE_MASK | \
GDK_BUTTON_PRESS_MASK | \
GDK_BUTTON_RELEASE_MASK | \
GDK_BUTTON1_MOTION_MASK
struct __brushes_sel
{
gchar *dname;
GimpRunBrushCallback cback;
GtkWidget *brush_preview;
GtkWidget *device_brushpopup;
GtkWidget *device_brushpreview;
GtkWidget *button;
GtkWidget *top_hbox;
gchar *brush_name; /* Local copy */
gdouble opacity;
gint spacing;
gint paint_mode;
gint width;
gint height;
gchar *mask_data; /* local copy */
void *brush_popup_pnt; /* Pointer use to control the popup */
gpointer data;
};
typedef struct __brushes_sel BSelect;
static void
brush_popup_open (gint x,
gint y,
BSelect *bsel)
{
gint x_org;
gint y_org;
gint scr_w;
gint scr_h;
gchar *src;
gchar *buf;
guchar *b;
guchar *s;
/* make sure the popup exists and is not visible */
if (bsel->device_brushpopup == NULL)
{
GtkWidget *frame;
bsel->device_brushpopup = 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 (bsel->device_brushpopup), frame);
gtk_widget_show (frame);
bsel->device_brushpreview = gtk_preview_new (GTK_PREVIEW_GRAYSCALE);
gtk_container_add (GTK_CONTAINER (frame), bsel->device_brushpreview);
gtk_widget_show (bsel->device_brushpreview);
}
else
{
gtk_widget_hide (bsel->device_brushpopup);
}
/* decide where to put the popup */
gdk_window_get_origin (bsel->brush_preview->window, &x_org, &y_org);
scr_w = gdk_screen_width ();
scr_h = gdk_screen_height ();
x = x_org + x - (bsel->width >> 1);
y = y_org + y - (bsel->height >> 1);
x = (x < 0) ? 0 : x;
y = (y < 0) ? 0 : y;
x = (x + bsel->width > scr_w) ? scr_w - bsel->width : x;
y = (y + bsel->height > scr_h) ? scr_h - bsel->height : y;
gtk_preview_size (GTK_PREVIEW (bsel->device_brushpreview), bsel->width, bsel->height);
gtk_widget_set_uposition (bsel->device_brushpopup, x, y);
gtk_widget_show (bsel->device_brushpopup);
/* Draw the brush */
buf = g_new (gchar, bsel->width);
memset (buf, 255, sizeof(bsel->width));
src = bsel->mask_data;
for (y = 0; y < bsel->height; y++)
{
int j;
s = src;
b = buf;
for (j = 0; j < bsel->width ; j++)
*b++ = 255 - *s++;
gtk_preview_draw_row (GTK_PREVIEW (bsel->device_brushpreview),
(guchar *)buf, 0, y, bsel->width);
src += bsel->width;
}
g_free (buf);
/* Draw the brush preview */
gtk_widget_draw (bsel->device_brushpreview, NULL);
}
static void
brush_popup_close (BSelect *bsel)
{
if (bsel->device_brushpopup != NULL)
gtk_widget_hide (bsel->device_brushpopup);
}
static gint
brush_preview_events (GtkWidget *widget,
GdkEvent *event,
gpointer data)
{
GdkEventButton *bevent;
BSelect *bsel = (BSelect*)data;
if (bsel->mask_data)
{
switch (event->type)
{
case GDK_EXPOSE:
break;
case GDK_BUTTON_PRESS:
bevent = (GdkEventButton *) event;
if (bevent->button == 1)
{
gtk_grab_add (widget);
brush_popup_open (bevent->x, bevent->y, bsel);
}
break;
case GDK_BUTTON_RELEASE:
bevent = (GdkEventButton *) event;
if (bevent->button == 1)
{
gtk_grab_remove (widget);
brush_popup_close (bsel);
}
break;
case GDK_DELETE:
break;
default:
break;
}
}
return FALSE;
}
static void
brush_pre_update (GtkWidget *brush_preview,
gint brush_width,
gint brush_height,
gchar *mask_data)
{
gint y;
gint i;
gchar *src;
gchar *buf;
guchar *b;
guchar *s;
gint offset_x;
gint offset_y;
gint yend;
gint ystart;
gint width,height;
/* Draw the brush */
buf = g_new (gchar, CELL_SIZE);
/* Limit to cell size */
width = (brush_width > CELL_SIZE) ? CELL_SIZE: brush_width;
height = (brush_height > CELL_SIZE) ? CELL_SIZE: brush_height;
/* Set buffer to white */
memset (buf, 255, CELL_SIZE);
for (i = 0; i < CELL_SIZE; i++)
gtk_preview_draw_row (GTK_PREVIEW (brush_preview),
(guchar *)buf, 0, i, CELL_SIZE);
offset_x = ((CELL_SIZE - width) >> 1);
offset_y = ((CELL_SIZE - height) >> 1);
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 (brush_preview),
(guchar *)buf, offset_x, y, width);
src += brush_width;
}
g_free (buf);
/* Draw the brush preview */
gtk_widget_draw (brush_preview, NULL);
}
static void
brush_select_invoker (gchar *name,
gdouble opacity,
gint spacing,
gint paint_mode,
gint width,
gint height,
gchar *mask_data,
gint closing,
gpointer data)
{
gint mask_d_sz;
BSelect *bsel = (BSelect *) data;
if(bsel->mask_data != NULL)
g_free(bsel->mask_data);
bsel->width = width;
bsel->height = height;
mask_d_sz = width * height;
bsel->mask_data = g_malloc (mask_d_sz);
g_memmove (bsel->mask_data, mask_data, mask_d_sz);
brush_pre_update (bsel->brush_preview,
bsel->width, bsel->height, bsel->mask_data);
bsel->opacity = opacity;
bsel->spacing = spacing;
bsel->paint_mode = paint_mode;
if (bsel->cback != NULL)
(bsel->cback) (name, opacity, spacing, paint_mode,
width, height, mask_data, closing, bsel->data);
if (closing)
{
gtk_widget_set_sensitive (bsel->button, TRUE);
bsel->brush_popup_pnt = NULL;
}
}
static void
brush_select_callback (GtkWidget *widget,
gpointer data)
{
BSelect *bsel = (BSelect*)data;
gtk_widget_set_sensitive (bsel->button,FALSE);
bsel->brush_popup_pnt =
gimp_interactive_selection_brush ((bsel->dname) ? bsel->dname
: "Brush Plugin Selection",
bsel->brush_name,
bsel->opacity,
bsel->spacing,
bsel->paint_mode,
brush_select_invoker,
bsel);
}
GtkWidget *
gimp_brush_select_widget (gchar *dname,
gchar *ibrush,
gdouble opacity,
gint spacing,
gint paint_mode,
GimpRunBrushCallback cback,
gpointer data)
{
GtkWidget *frame;
GtkWidget *hbox;
GtkWidget *brush;
GtkWidget *button;
gint width;
gint height;
gint init_spacing;
GimpLayerModeEffects init_paint_mode;
gdouble init_opacity;
gint mask_data_size;
guint8 *mask_data;
gchar *brush_name;
BSelect *bsel;
bsel = g_new (BSelect, 1);
hbox = gtk_hbox_new (FALSE, 3);
gtk_widget_show (hbox);
frame = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME(frame), GTK_SHADOW_OUT);
gtk_widget_show (frame);
brush = gtk_preview_new (GTK_PREVIEW_GRAYSCALE);
gtk_preview_size (GTK_PREVIEW (brush), CELL_SIZE, CELL_SIZE);
gtk_widget_show (brush);
gtk_container_add (GTK_CONTAINER (frame), brush);
gtk_widget_set_events (brush, BRUSH_EVENT_MASK);
g_signal_connect (G_OBJECT (brush), "event",
G_CALLBACK (brush_preview_events),
bsel);
bsel->cback = cback;
bsel->data = data;
bsel->mask_data = NULL;
bsel->device_brushpopup = bsel->device_brushpreview = NULL;
bsel->brush_preview = brush;
bsel->brush_name = ibrush;
bsel->dname = dname;
bsel->brush_popup_pnt = NULL;
/* Do initial brush setup */
brush_name = gimp_brushes_get_brush_data (ibrush,
&init_opacity,
&init_spacing,
&init_paint_mode,
&width,
&height,
&mask_data_size,
&mask_data);
if (brush_name)
{
brush_pre_update (bsel->brush_preview, width, height, mask_data);
bsel->mask_data = mask_data;
bsel->brush_name = brush_name;
bsel->width = width;
bsel->height = height;
if (opacity != -1)
bsel->opacity = opacity;
else
bsel->opacity = init_opacity;
if (spacing != -1)
bsel->spacing = spacing;
else
bsel->spacing = init_spacing;
if (paint_mode != -1)
bsel->paint_mode = paint_mode;
else
bsel->paint_mode = init_paint_mode;
}
gtk_box_pack_start (GTK_BOX (hbox), frame, TRUE, TRUE, 0);
button = gtk_button_new_with_label ("... ");
gtk_container_add (GTK_CONTAINER (hbox), button);
gtk_widget_show(button);
bsel->button = button;
g_signal_connect (G_OBJECT (button), "clicked",
G_CALLBACK (brush_select_callback),
bsel);
g_object_set_data (G_OBJECT (hbox), BSEL_DATA_KEY, bsel);
return hbox;
}
void
gimp_brush_select_widget_close_popup (GtkWidget *widget)
{
BSelect *bsel;
bsel = (BSelect *) g_object_get_data (G_OBJECT (widget), BSEL_DATA_KEY);
if (bsel && bsel->brush_popup_pnt)
{
gimp_brushes_close_popup (bsel->brush_popup_pnt);
bsel->brush_popup_pnt = NULL;
}
}
void
gimp_brush_select_widget_set_popup (GtkWidget *widget,
gchar *bname,
gdouble opacity,
gint spacing,
gint paint_mode)
{
gint width;
gint height;
gint init_spacing;
GimpLayerModeEffects init_paint_mode;
gdouble init_opacity;
gint mask_data_size;
guint8 *mask_data;
gchar *brush_name;
BSelect *bsel;
bsel = (BSelect *) g_object_get_data (G_OBJECT (widget), BSEL_DATA_KEY);
if (bsel)
{
brush_name = gimp_brushes_get_brush_data (bname,
&init_opacity,
&init_spacing,
&init_paint_mode,
&width,
&height,
&mask_data_size,
&mask_data);
if (opacity == -1.0)
opacity = init_opacity;
if (spacing == -1)
spacing = init_spacing;
if (paint_mode == -1)
paint_mode = init_paint_mode;
brush_select_invoker (bname, opacity, spacing, paint_mode,
width, height, mask_data, 0, bsel);
if (bsel->brush_popup_pnt)
gimp_brushes_set_popup (bsel->brush_popup_pnt,
bname, opacity, spacing, paint_mode);
}
}
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