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gimp/libgimp/gimpgradientmenu.c
Michael Natterer c1c876a963 Some DND fixes / cleanup: 
2005-07-25  Michael Natterer  <mitch@gimp.org>

	Some DND fixes / cleanup:

	* app/widgets/widgets-enums.h: renamed GIMP_DND_TYPE_TOOL to
	GIMP_DND_TYPE_TOOL_INFO.

	* app/widgets/gimpselectiondata.[ch]: s/tool/tool_info/g. Moved
	private functions to the end of the file. Include GIMP's PID in
	all GtkSelectionData strings which are used to pass around stuff
	by reference. For things which are referenced by name, also encode
	the object's address in the GtkSelectionData so having a brush
	called "Standard" or a named buffer called "Global Buffer" will
	work together with DND.

	* app/widgets/gimpdnd.[ch]: s/tool/tool_info/g. Renamed
	gimp_dnd_get_data_data() to gimp_dnd_get_object_data() since it's
	not limited to GimpData objects. Follow above selection data API
	changes. Cleanup.

	* libgimp/gimpbrushmenu.c
	* libgimp/gimpdrawablecombobox.c
	* libgimp/gimpfontselectbutton.c
	* libgimp/gimpgradientmenu.c
	* libgimp/gimpimagecombobox.c
	* libgimp/gimppalettemenu.c
	* libgimp/gimppatternmenu.c: follow GtkSelectionData format change
	and check the dropped things' PID against the return value of
	gimp_getpid().
2005-07-25 13:53:00 +00:00

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/* LIBGIMP - The GIMP Library
* Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
*
* gimpgradientmenu.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>
#include "gimp.h"
#include "gimpui.h"
#include "libgimp-intl.h"
#define GRADIENT_SELECT_DATA_KEY "gimp-gradient-select-data"
#define CELL_HEIGHT 18
#define CELL_WIDTH 84
typedef struct _GradientSelect GradientSelect;
struct _GradientSelect
{
gchar *title;
GimpRunGradientCallback callback;
gpointer data;
GtkWidget *preview;
GtkWidget *button;
gchar *gradient_name; /* Local copy */
gint sample_size;
gboolean reverse;
gint n_samples;
gdouble *gradient_data; /* Local copy */
const gchar *temp_gradient_callback;
};
/* local function prototypes */
static void gimp_gradient_select_widget_callback (const gchar *name,
gint n_samples,
const gdouble *gradient_data,
gboolean closing,
gpointer data);
static void gimp_gradient_select_widget_clicked (GtkWidget *widget,
GradientSelect *gradient_sel);
static void gimp_gradient_select_widget_destroy (GtkWidget *widget,
GradientSelect *gradient_sel);
static void gimp_gradient_select_preview_size_allocate
(GtkWidget *widget,
GtkAllocation *allocation,
GradientSelect *gradient_sel);
static void gimp_gradient_select_preview_expose (GtkWidget *preview,
GdkEventExpose *event,
GradientSelect *gradient_sel);
static void gimp_gradient_select_drag_data_received (GtkWidget *widget,
GdkDragContext *context,
gint x,
gint y,
GtkSelectionData *selection,
guint info,
guint time);
static const GtkTargetEntry target = { "application/x-gimp-gradient-name", 0 };
/**
* gimp_gradient_select_widget_new:
* @title: Title of the dialog to use or %NULL to use the default title.
* @gradient_name: Initial gradient name or %NULL to use current selection.
* @callback: A function to call when the selected gradient 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 gradient. 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_gradient_select_widget_new (const gchar *title,
const gchar *gradient_name,
GimpRunGradientCallback callback,
gpointer data)
{
GradientSelect *gradient_sel;
g_return_val_if_fail (callback != NULL, NULL);
if (! title)
title = _("Gradient Selection");
gradient_sel = g_new0 (GradientSelect, 1);
gradient_sel->title = g_strdup (title);
gradient_sel->callback = callback;
gradient_sel->data = data;
gradient_sel->sample_size = CELL_WIDTH;
gradient_sel->reverse = FALSE;
if (! gradient_name || ! strlen (gradient_name))
gradient_sel->gradient_name = gimp_context_get_gradient ();
else
gradient_sel->gradient_name = g_strdup (gradient_name);
gradient_sel->button = gtk_button_new ();
g_signal_connect (gradient_sel->button, "clicked",
G_CALLBACK (gimp_gradient_select_widget_clicked),
gradient_sel);
g_signal_connect (gradient_sel->button, "destroy",
G_CALLBACK (gimp_gradient_select_widget_destroy),
gradient_sel);
gtk_drag_dest_set (GTK_WIDGET (gradient_sel->button),
GTK_DEST_DEFAULT_HIGHLIGHT |
GTK_DEST_DEFAULT_MOTION |
GTK_DEST_DEFAULT_DROP,
&target, 1,
GDK_ACTION_COPY);
g_signal_connect (gradient_sel->button, "drag-data-received",
G_CALLBACK (gimp_gradient_select_drag_data_received),
NULL);
gradient_sel->preview = gtk_drawing_area_new ();
gtk_widget_set_size_request (gradient_sel->preview, CELL_WIDTH, CELL_HEIGHT);
gtk_container_add (GTK_CONTAINER (gradient_sel->button),
gradient_sel->preview);
gtk_widget_show (gradient_sel->preview);
g_signal_connect (gradient_sel->preview, "size-allocate",
G_CALLBACK (gimp_gradient_select_preview_size_allocate),
gradient_sel);
g_signal_connect (gradient_sel->preview, "expose-event",
G_CALLBACK (gimp_gradient_select_preview_expose),
gradient_sel);
g_object_set_data (G_OBJECT (gradient_sel->button),
GRADIENT_SELECT_DATA_KEY, gradient_sel);
return gradient_sel->button;
}
/**
* gimp_gradient_select_widget_close;
* @widget: A gradient select widget.
*
* Closes the popup window associated with @widget.
*/
void
gimp_gradient_select_widget_close (GtkWidget *widget)
{
GradientSelect *gradient_sel;
gradient_sel = g_object_get_data (G_OBJECT (widget),
GRADIENT_SELECT_DATA_KEY);
g_return_if_fail (gradient_sel != NULL);
if (gradient_sel->temp_gradient_callback)
{
gimp_gradient_select_destroy (gradient_sel->temp_gradient_callback);
gradient_sel->temp_gradient_callback = NULL;
}
}
/**
* gimp_gradient_select_widget_set:
* @widget: A gradient select widget.
* @gradient_name: Gradient name to set.
*
* Sets the current gradient for the gradient select widget. Calls
* the callback function if one was supplied in the call to
* gimp_gradient_select_widget_new().
*/
void
gimp_gradient_select_widget_set (GtkWidget *widget,
const gchar *gradient_name)
{
GradientSelect *gradient_sel;
gradient_sel = g_object_get_data (G_OBJECT (widget),
GRADIENT_SELECT_DATA_KEY);
g_return_if_fail (gradient_sel != NULL);
if (gradient_sel->temp_gradient_callback)
{
gimp_gradients_set_popup (gradient_sel->temp_gradient_callback,
gradient_name);
}
else
{
gchar *name;
gdouble *samples;
gint n_samples;
if (! gradient_name || ! strlen (gradient_name))
name = gimp_context_get_gradient ();
else
name = g_strdup (gradient_name);
if (gimp_gradient_get_uniform_samples (name,
gradient_sel->sample_size,
gradient_sel->reverse,
&n_samples,
&samples))
{
gimp_gradient_select_widget_callback (name,
n_samples, samples,
FALSE, gradient_sel);
g_free (samples);
}
g_free (name);
}
}
/* private functions */
static void
gimp_gradient_select_widget_callback (const gchar *name,
gint n_samples,
const gdouble *gradient_data,
gboolean closing,
gpointer data)
{
GradientSelect *gradient_sel = data;
g_free (gradient_sel->gradient_name);
g_free (gradient_sel->gradient_data);
gradient_sel->gradient_name = g_strdup (name);
gradient_sel->n_samples = n_samples;
gradient_sel->gradient_data = g_memdup (gradient_data,
n_samples * sizeof (gdouble));
gtk_widget_queue_draw (gradient_sel->preview);
if (gradient_sel->callback)
gradient_sel->callback (name,
n_samples, gradient_data, closing,
gradient_sel->data);
if (closing)
gradient_sel->temp_gradient_callback = NULL;
}
static void
gimp_gradient_select_widget_clicked (GtkWidget *widget,
GradientSelect *gradient_sel)
{
if (gradient_sel->temp_gradient_callback)
{
/* calling gimp_gradients_set_popup() raises the dialog */
gimp_gradients_set_popup (gradient_sel->temp_gradient_callback,
gradient_sel->gradient_name);
}
else
{
gradient_sel->temp_gradient_callback =
gimp_gradient_select_new (gradient_sel->title,
gradient_sel->gradient_name,
gradient_sel->sample_size,
gimp_gradient_select_widget_callback,
gradient_sel);
}
}
static void
gimp_gradient_select_widget_destroy (GtkWidget *widget,
GradientSelect *gradient_sel)
{
if (gradient_sel->temp_gradient_callback)
{
gimp_gradient_select_destroy (gradient_sel->temp_gradient_callback);
gradient_sel->temp_gradient_callback = NULL;
}
g_free (gradient_sel->title);
g_free (gradient_sel->gradient_name);
g_free (gradient_sel->gradient_data);
g_free (gradient_sel);
}
static void
gimp_gradient_select_preview_size_allocate (GtkWidget *widget,
GtkAllocation *allocation,
GradientSelect *gradient_sel)
{
gdouble *samples;
gint n_samples;
if (gimp_gradient_get_uniform_samples (gradient_sel->gradient_name,
allocation->width,
gradient_sel->reverse,
&n_samples,
&samples))
{
g_free (gradient_sel->gradient_data);
gradient_sel->sample_size = allocation->width;
gradient_sel->n_samples = n_samples;
gradient_sel->gradient_data = samples;
}
}
static void
gimp_gradient_select_preview_expose (GtkWidget *widget,
GdkEventExpose *event,
GradientSelect *gradient_sel)
{
const gdouble *src;
guchar *p0;
guchar *p1;
guchar *even;
guchar *odd;
gint width;
gint x, y;
src = gradient_sel->gradient_data;
if (! src)
return;
width = gradient_sel->n_samples / 4;
p0 = even = g_malloc (width * 3);
p1 = odd = g_malloc (width * 3);
for (x = 0; x < width; x++)
{
gdouble r, g, b, a;
gdouble c0, c1;
r = src[x * 4 + 0];
g = src[x * 4 + 1];
b = src[x * 4 + 2];
a = src[x * 4 + 3];
if ((x / GIMP_CHECK_SIZE_SM) & 1)
{
c0 = GIMP_CHECK_LIGHT;
c1 = GIMP_CHECK_DARK;
}
else
{
c0 = GIMP_CHECK_DARK;
c1 = GIMP_CHECK_LIGHT;
}
*p0++ = (c0 + (r - c0) * a) * 255.0;
*p0++ = (c0 + (g - c0) * a) * 255.0;
*p0++ = (c0 + (b - c0) * a) * 255.0;
*p1++ = (c1 + (r - c1) * a) * 255.0;
*p1++ = (c1 + (g - c1) * a) * 255.0;
*p1++ = (c1 + (b - c1) * a) * 255.0;
}
for (y = event->area.y; y < event->area.y + event->area.height; y++)
{
guchar *buf = ((y / GIMP_CHECK_SIZE_SM) & 1) ? odd : even;
gdk_draw_rgb_image_dithalign (widget->window,
widget->style->fg_gc[widget->state],
event->area.x, y,
event->area.width, 1,
GDK_RGB_DITHER_MAX,
buf + event->area.x * 3,
width * 3,
- event->area.x, - y);
}
g_free (odd);
g_free (even);
}
static void
gimp_gradient_select_drag_data_received (GtkWidget *widget,
GdkDragContext *context,
gint x,
gint y,
GtkSelectionData *selection,
guint info,
guint time)
{
gchar *str;
if ((selection->format != 8) || (selection->length < 1))
{
g_warning ("Received invalid gradient data!");
return;
}
str = g_strndup (selection->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_gradient_select_widget_set (widget, name);
}
}
g_free (str);
}
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