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gimp/libgimp/gimpbrushselectbutton.c

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/* LIBGIMP - The GIMP Library
* Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
*
* gimpbrushselectbutton.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 3 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, see
* <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <gegl.h>
#include <gtk/gtk.h>
#include "libgimpwidgets/gimpwidgets.h"
#include "gimp.h"
#include "gimpuitypes.h"
#include "gimpbrushselectbutton.h"
#include "gimpuimarshal.h"
#include "libgimp-intl.h"
/**
* SECTION: gimpbrushselectbutton
* @title: gimpbrushselectbutton
* @short_description: A button that pops up a brush selection dialog.
*
* A button that pops up a brush selection dialog.
**/
#define CELL_SIZE 20
enum
{
BRUSH_SET,
LAST_SIGNAL
};
enum
{
PROP_0,
PROP_TITLE,
PROP_BRUSH_NAME,
PROP_BRUSH_OPACITY,
PROP_BRUSH_SPACING,
PROP_BRUSH_PAINT_MODE
};
struct _GimpBrushSelectButtonPrivate
{
gchar *title;
gchar *brush_name; /* Local copy */
gdouble opacity;
gint spacing;
GimpLayerMode paint_mode;
gint width;
gint height;
guchar *mask_data; /* local copy */
GtkWidget *inside;
GtkWidget *preview;
GtkWidget *popup;
};
/* local function prototypes */
static void gimp_brush_select_button_finalize (GObject *object);
static void gimp_brush_select_button_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void gimp_brush_select_button_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static void gimp_brush_select_button_clicked (GimpBrushSelectButton *button);
static void gimp_brush_select_button_callback (const gchar *brush_name,
gdouble opacity,
gint spacing,
GimpLayerMode paint_mode,
gint width,
gint height,
const guchar *mask_data,
gboolean dialog_closing,
gpointer user_data);
static void gimp_brush_select_preview_resize (GimpBrushSelectButton *button);
static gboolean gimp_brush_select_preview_events (GtkWidget *widget,
GdkEvent *event,
GimpBrushSelectButton *button);
static void gimp_brush_select_preview_draw (GimpPreviewArea *area,
gint x,
gint y,
gint width,
gint height,
const guchar *mask_data,
gint rowstride);
static void gimp_brush_select_preview_update (GtkWidget *preview,
gint brush_width,
gint brush_height,
const guchar *mask_data);
static void gimp_brush_select_button_open_popup (GimpBrushSelectButton *button,
gint x,
gint y);
static void gimp_brush_select_button_close_popup (GimpBrushSelectButton *button);
static void gimp_brush_select_drag_data_received (GimpBrushSelectButton *button,
GdkDragContext *context,
gint x,
gint y,
GtkSelectionData *selection,
guint info,
guint time);
static GtkWidget * gimp_brush_select_button_create_inside (GimpBrushSelectButton *button);
static const GtkTargetEntry target = { "application/x-gimp-brush-name", 0 };
static guint brush_button_signals[LAST_SIGNAL] = { 0 };
G_DEFINE_TYPE_WITH_PRIVATE (GimpBrushSelectButton, gimp_brush_select_button,
GIMP_TYPE_SELECT_BUTTON)
static void
gimp_brush_select_button_class_init (GimpBrushSelectButtonClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GimpSelectButtonClass *select_button_class = GIMP_SELECT_BUTTON_CLASS (klass);
object_class->finalize = gimp_brush_select_button_finalize;
object_class->set_property = gimp_brush_select_button_set_property;
object_class->get_property = gimp_brush_select_button_get_property;
select_button_class->select_destroy = gimp_brush_select_destroy;
klass->brush_set = NULL;
/**
* GimpBrushSelectButton:title:
*
* The title to be used for the brush selection popup dialog.
*
* Since: 2.4
*/
g_object_class_install_property (object_class, PROP_TITLE,
g_param_spec_string ("title",
"Title",
"The title to be used for the brush selection popup dialog",
_("Brush Selection"),
GIMP_PARAM_READWRITE |
G_PARAM_CONSTRUCT_ONLY));
/**
* GimpBrushSelectButton:brush-name:
*
* The name of the currently selected brush.
*
* Since: 2.4
*/
g_object_class_install_property (object_class, PROP_BRUSH_NAME,
g_param_spec_string ("brush-name",
"Brush name",
"The name of the currently selected brush",
NULL,
GIMP_PARAM_READWRITE));
/**
* GimpBrushSelectButton:opacity:
*
* The opacity of the currently selected brush.
*
* Since: 2.4
*/
g_object_class_install_property (object_class, PROP_BRUSH_OPACITY,
g_param_spec_double ("brush-opacity",
"Brush opacity",
"The opacity of the currently selected brush",
-1.0, 100.0, -1.0,
GIMP_PARAM_READWRITE));
/**
* GimpBrushSelectButton:spacing:
*
* The spacing of the currently selected brush.
*
* Since: 2.4
*/
g_object_class_install_property (object_class, PROP_BRUSH_SPACING,
g_param_spec_int ("brush-spacing",
"Brush spacing",
"The spacing of the currently selected brush",
-G_MAXINT, 1000, -1,
GIMP_PARAM_READWRITE));
/**
* GimpBrushSelectButton:paint-mode:
*
* The paint mode.
*
* Since: 2.4
*/
g_object_class_install_property (object_class, PROP_BRUSH_PAINT_MODE,
g_param_spec_int ("brush-paint-mode",
"Brush paint mode",
"The paint mode of the currently selected brush",
-1, GIMP_LAYER_MODE_LUMINANCE,
-1,
GIMP_PARAM_READWRITE));
/**
* GimpBrushSelectButton::brush-set:
* @widget: the object which received the signal.
* @brush_name: the name of the currently selected brush.
* @opacity: opacity of the brush
* @spacing: spacing of the brush
* @paint_mode: paint mode of the brush
* @width: width of the brush
* @height: height of the brush
* @mask_data: (array) (element-type guchar): brush mask data
* @dialog_closing: whether the dialog was closed or not.
*
* The ::brush-set signal is emitted when the user selects a brush.
*
* Since: 2.4
*/
brush_button_signals[BRUSH_SET] =
g_signal_new ("brush-set",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpBrushSelectButtonClass, brush_set),
NULL, NULL,
_gimpui_marshal_VOID__STRING_DOUBLE_INT_INT_INT_INT_POINTER_BOOLEAN,
G_TYPE_NONE, 8,
G_TYPE_STRING,
G_TYPE_DOUBLE,
G_TYPE_INT,
G_TYPE_INT,
G_TYPE_INT,
G_TYPE_INT,
G_TYPE_POINTER,
G_TYPE_BOOLEAN);
}
static void
gimp_brush_select_button_init (GimpBrushSelectButton *button)
{
GimpBrushSelectButtonPrivate *priv;
gint mask_bpp;
gint mask_data_size;
gint color_bpp;
gint color_data_size;
guint8 *color_data;
button->priv = gimp_brush_select_button_get_instance_private (button);
priv = button->priv;
priv->brush_name = gimp_context_get_brush ();
gimp_brush_get_pixels (priv->brush_name,
&priv->width,
&priv->height,
&mask_bpp,
&mask_data_size,
&priv->mask_data,
&color_bpp,
&color_data_size,
&color_data);
if (color_data)
g_free (color_data);
priv->inside = gimp_brush_select_button_create_inside (button);
gtk_container_add (GTK_CONTAINER (button), priv->inside);
}
/**
* gimp_brush_select_button_new:
* @title: Title of the dialog to use or %NULL means 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.
*
* Creates a new #GtkWidget that completely controls the selection of
* a brush. This widget is suitable for placement in a table in a
* plug-in dialog.
*
* Returns: A #GtkWidget that you can use in your UI.
*
* Since: 2.4
*/
GtkWidget *
gimp_brush_select_button_new (const gchar *title,
const gchar *brush_name,
gdouble opacity,
gint spacing,
GimpLayerMode paint_mode)
{
GtkWidget *button;
if (title)
button = g_object_new (GIMP_TYPE_BRUSH_SELECT_BUTTON,
"title", title,
"brush-name", brush_name,
"brush-opacity", opacity,
"brush-spacing", spacing,
"brush-paint-mode", paint_mode,
NULL);
else
button = g_object_new (GIMP_TYPE_BRUSH_SELECT_BUTTON,
"brush-name", brush_name,
"brush-opacity", opacity,
"brush-spacing", spacing,
"brush-paint-mode", paint_mode,
NULL);
return button;
}
/**
* gimp_brush_select_button_get_brush:
* @button: A #GimpBrushSelectButton
* @opacity: Opacity of the selected brush.
* @spacing: Spacing of the selected brush.
* @paint_mode: Paint mode of the selected brush.
*
* Retrieves the properties of currently selected brush.
*
* Returns: an internal copy of the brush name which must not be freed.
*
* Since: 2.4
*/
const gchar *
gimp_brush_select_button_get_brush (GimpBrushSelectButton *button,
gdouble *opacity,
gint *spacing,
GimpLayerMode *paint_mode)
{
g_return_val_if_fail (GIMP_IS_BRUSH_SELECT_BUTTON (button), NULL);
if (opacity)
*opacity = button->priv->opacity;
if (spacing)
*spacing = button->priv->spacing;
if (paint_mode)
*paint_mode = button->priv->paint_mode;
return button->priv->brush_name;
}
/**
* gimp_brush_select_button_set_brush:
* @button: A #GimpBrushSelectButton
* @brush_name: Brush name to set; %NULL means no change.
* @opacity: Opacity to set. -1.0 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
* button.
*
* Since: 2.4
*/
void
gimp_brush_select_button_set_brush (GimpBrushSelectButton *button,
const gchar *brush_name,
gdouble opacity,
gint spacing,
GimpLayerMode paint_mode)
{
GimpSelectButton *select_button;
g_return_if_fail (GIMP_IS_BRUSH_SELECT_BUTTON (button));
select_button = GIMP_SELECT_BUTTON (button);
if (select_button->temp_callback)
{
gimp_brushes_set_popup (select_button->temp_callback, brush_name,
opacity, spacing, paint_mode);
}
else
{
gchar *name;
gint width;
gint height;
gint bytes;
gint mask_data_size;
guint8 *mask_data;
gint color_bpp;
gint color_data_size;
guint8 *color_data;
if (brush_name && *brush_name)
name = g_strdup (brush_name);
else
name = gimp_context_get_brush ();
if (gimp_brush_get_pixels (name,
&width,
&height,
&bytes,
&mask_data_size,
&mask_data,
&color_bpp,
&color_data_size,
&color_data))
{
if (color_data)
g_free (color_data);
if (opacity < 0.0)
opacity = gimp_context_get_opacity ();
if (spacing == -1)
gimp_brush_get_spacing (name, &spacing);
if (paint_mode == -1)
paint_mode = gimp_context_get_paint_mode ();
gimp_brush_select_button_callback (name,
opacity, spacing, paint_mode,
width, height, mask_data,
FALSE, button);
g_free (mask_data);
}
g_free (name);
}
}
/* private functions */
static void
gimp_brush_select_button_finalize (GObject *object)
{
GimpBrushSelectButton *button = GIMP_BRUSH_SELECT_BUTTON (object);
g_clear_pointer (&button->priv->brush_name, g_free);
g_clear_pointer (&button->priv->mask_data, g_free);
g_clear_pointer (&button->priv->title, g_free);
G_OBJECT_CLASS (gimp_brush_select_button_parent_class)->finalize (object);
}
static void
gimp_brush_select_button_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
GimpBrushSelectButton *button = GIMP_BRUSH_SELECT_BUTTON (object);
gdouble opacity;
gint32 spacing;
gint32 paint_mode;
switch (property_id)
{
case PROP_TITLE:
button->priv->title = g_value_dup_string (value);
break;
case PROP_BRUSH_NAME:
gimp_brush_select_button_set_brush (button,
g_value_get_string (value),
-1.0, -1, -1);
break;
case PROP_BRUSH_OPACITY:
opacity = g_value_get_double (value);
if (opacity >= 0.0)
button->priv->opacity = opacity;
break;
case PROP_BRUSH_SPACING:
spacing = g_value_get_int (value);
if (spacing != -1)
button->priv->spacing = spacing;
break;
case PROP_BRUSH_PAINT_MODE:
paint_mode = g_value_get_int (value);
if (paint_mode != -1)
button->priv->paint_mode = paint_mode;
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_brush_select_button_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
GimpBrushSelectButton *button = GIMP_BRUSH_SELECT_BUTTON (object);
switch (property_id)
{
case PROP_TITLE:
g_value_set_string (value, button->priv->title);
break;
case PROP_BRUSH_NAME:
g_value_set_string (value, button->priv->brush_name);
break;
case PROP_BRUSH_OPACITY:
g_value_set_double (value, button->priv->opacity);
break;
case PROP_BRUSH_SPACING:
g_value_set_int (value, button->priv->spacing);
break;
case PROP_BRUSH_PAINT_MODE:
g_value_set_int (value, button->priv->paint_mode);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_brush_select_button_callback (const gchar *name,
gdouble opacity,
gint spacing,
GimpLayerMode paint_mode,
gint width,
gint height,
const guchar *mask_data,
gboolean dialog_closing,
gpointer data)
{
GimpBrushSelectButton *button = GIMP_BRUSH_SELECT_BUTTON (data);
GimpSelectButton *select_button = GIMP_SELECT_BUTTON (button);
g_free (button->priv->brush_name);
g_free (button->priv->mask_data);
button->priv->brush_name = g_strdup (name);
button->priv->width = width;
button->priv->height = height;
button->priv->mask_data = g_memdup (mask_data, width * height);
button->priv->opacity = opacity;
button->priv->spacing = spacing;
button->priv->paint_mode = paint_mode;
gimp_brush_select_preview_update (button->priv->preview,
width, height, mask_data);
if (dialog_closing)
select_button->temp_callback = NULL;
g_signal_emit (button, brush_button_signals[BRUSH_SET], 0,
name, opacity, spacing, paint_mode, width, height, mask_data,
dialog_closing);
g_object_notify (G_OBJECT (button), "brush-name");
}
static void
gimp_brush_select_button_clicked (GimpBrushSelectButton *button)
{
GimpSelectButton *select_button = GIMP_SELECT_BUTTON (button);
if (select_button->temp_callback)
{
/* calling gimp_brushes_set_popup() raises the dialog */
gimp_brushes_set_popup (select_button->temp_callback,
button->priv->brush_name,
button->priv->opacity,
button->priv->spacing,
button->priv->paint_mode);
}
else
{
select_button->temp_callback =
gimp_brush_select_new (button->priv->title,
button->priv->brush_name,
button->priv->opacity,
button->priv->spacing,
button->priv->paint_mode,
gimp_brush_select_button_callback,
button, NULL);
}
}
static void
gimp_brush_select_preview_resize (GimpBrushSelectButton *button)
{
if (button->priv->width > 0 &&
button->priv->height > 0)
gimp_brush_select_preview_update (button->priv->preview,
button->priv->width,
button->priv->height,
button->priv->mask_data);
}
static gboolean
gimp_brush_select_preview_events (GtkWidget *widget,
GdkEvent *event,
GimpBrushSelectButton *button)
{
GdkEventButton *bevent;
if (button->priv->mask_data)
{
switch (event->type)
{
case GDK_BUTTON_PRESS:
bevent = (GdkEventButton *) event;
if (bevent->button == 1)
{
gtk_grab_add (widget);
gimp_brush_select_button_open_popup (button,
bevent->x, bevent->y);
}
break;
case GDK_BUTTON_RELEASE:
bevent = (GdkEventButton *) event;
if (bevent->button == 1)
{
gtk_grab_remove (widget);
gimp_brush_select_button_close_popup (button);
}
break;
default:
break;
}
}
return FALSE;
}
static void
gimp_brush_select_preview_draw (GimpPreviewArea *area,
gint x,
gint y,
gint width,
gint height,
const guchar *mask_data,
gint rowstride)
{
const guchar *src;
guchar *dest;
guchar *buf;
gint i, j;
buf = g_new (guchar, width * height);
src = mask_data;
dest = buf;
for (j = 0; j < height; j++)
{
const guchar *s = src;
for (i = 0; i < width; i++, s++, dest++)
*dest = 255 - *s;
src += rowstride;
}
gimp_preview_area_draw (area,
x, y, width, height,
GIMP_GRAY_IMAGE,
buf,
width);
g_free (buf);
}
static void
gimp_brush_select_preview_update (GtkWidget *preview,
gint brush_width,
gint brush_height,
const guchar *mask_data)
{
GimpPreviewArea *area = GIMP_PREVIEW_AREA (preview);
GtkAllocation allocation;
gint x, y;
gint width, height;
gtk_widget_get_allocation (preview, &allocation);
width = MIN (brush_width, allocation.width);
height = MIN (brush_height, allocation.height);
x = ((allocation.width - width) / 2);
y = ((allocation.height - height) / 2);
if (x || y)
gimp_preview_area_fill (area,
0, 0,
allocation.width,
allocation.height,
0xFF, 0xFF, 0xFF);
gimp_brush_select_preview_draw (area,
x, y, width, height,
mask_data, brush_width);
}
static void
gimp_brush_select_button_open_popup (GimpBrushSelectButton *button,
gint x,
gint y)
{
GimpBrushSelectButtonPrivate *priv = button->priv;
GtkWidget *frame;
GtkWidget *preview;
GdkMonitor *monitor;
GdkRectangle workarea;
gint x_org;
gint y_org;
if (priv->popup)
gimp_brush_select_button_close_popup (button);
if (priv->width <= CELL_SIZE && priv->height <= CELL_SIZE)
return;
priv->popup = gtk_window_new (GTK_WINDOW_POPUP);
gtk_window_set_type_hint (GTK_WINDOW (priv->popup), GDK_WINDOW_TYPE_HINT_DND);
gtk_window_set_screen (GTK_WINDOW (priv->popup),
gtk_widget_get_screen (GTK_WIDGET (button)));
frame = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_OUT);
gtk_container_add (GTK_CONTAINER (priv->popup), frame);
gtk_widget_show (frame);
preview = gimp_preview_area_new ();
gtk_widget_set_size_request (preview, priv->width, priv->height);
gtk_container_add (GTK_CONTAINER (frame), preview);
gtk_widget_show (preview);
/* decide where to put the popup */
gdk_window_get_origin (gtk_widget_get_window (priv->preview),
&x_org, &y_org);
monitor = gimp_widget_get_monitor (GTK_WIDGET (button));
gdk_monitor_get_workarea (monitor, &workarea);
x = x_org + x - (priv->width / 2);
y = y_org + y - (priv->height / 2);
x = CLAMP (x, workarea.x, workarea.x + workarea.width - priv->width);
y = CLAMP (y, workarea.y, workarea.y + workarea.height - priv->height);
gtk_window_move (GTK_WINDOW (priv->popup), x, y);
gtk_widget_show (priv->popup);
/* Draw the brush */
gimp_brush_select_preview_draw (GIMP_PREVIEW_AREA (preview),
0, 0, priv->width, priv->height,
priv->mask_data, priv->width);
}
static void
gimp_brush_select_button_close_popup (GimpBrushSelectButton *button)
{
g_clear_pointer (&button->priv->popup, gtk_widget_destroy);
}
static void
gimp_brush_select_drag_data_received (GimpBrushSelectButton *button,
GdkDragContext *context,
gint x,
gint y,
GtkSelectionData *selection,
guint info,
guint time)
{
gint length = gtk_selection_data_get_length (selection);
gchar *str;
if (gtk_selection_data_get_format (selection) != 8 || length < 1)
{
g_warning ("%s: received invalid brush data", G_STRFUNC);
return;
}
str = g_strndup ((const gchar *) gtk_selection_data_get_data (selection),
length);
if (g_utf8_validate (str, -1, NULL))
{
gint pid;
gpointer unused;
gint name_offset = 0;
if (sscanf (str, "%i:%p:%n", &pid, &unused, &name_offset) >= 2 &&
pid == gimp_getpid () && name_offset > 0)
{
gchar *name = str + name_offset;
gimp_brush_select_button_set_brush (button, name, -1.0, -1, -1);
}
}
g_free (str);
}
static GtkWidget *
gimp_brush_select_button_create_inside (GimpBrushSelectButton *brush_button)
{
GimpBrushSelectButtonPrivate *priv = brush_button->priv;
GtkWidget *hbox;
GtkWidget *frame;
GtkWidget *button;
hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
frame = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
gtk_box_pack_start (GTK_BOX (hbox), frame, FALSE, FALSE, 0);
priv->preview = gimp_preview_area_new ();
gtk_widget_add_events (priv->preview,
GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK);
gtk_widget_set_size_request (priv->preview, CELL_SIZE, CELL_SIZE);
gtk_container_add (GTK_CONTAINER (frame), priv->preview);
g_signal_connect_swapped (priv->preview, "size-allocate",
G_CALLBACK (gimp_brush_select_preview_resize),
brush_button);
g_signal_connect (priv->preview, "event",
G_CALLBACK (gimp_brush_select_preview_events),
brush_button);
gtk_drag_dest_set (GTK_WIDGET (priv->preview),
GTK_DEST_DEFAULT_HIGHLIGHT |
GTK_DEST_DEFAULT_MOTION |
GTK_DEST_DEFAULT_DROP,
&target, 1,
GDK_ACTION_COPY);
g_signal_connect_swapped (priv->preview, "drag-data-received",
G_CALLBACK (gimp_brush_select_drag_data_received),
brush_button);
button = gtk_button_new_with_mnemonic (_("_Browse..."));
gtk_box_pack_start (GTK_BOX (hbox), button, TRUE, TRUE, 0);
g_signal_connect_swapped (button, "clicked",
G_CALLBACK (gimp_brush_select_button_clicked),
brush_button);
gtk_widget_show_all (hbox);
return hbox;
}
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