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gimp/app/gimpdnd.c

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/* The GIMP -- an image manipulation program
* Copyright (C) 1995-1997 Spencer Kimball and Peter Mattis
*
* 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 "gimage.h"
#include "gimpcontextpreview.h"
#include "gimpdnd.h"
#include "gimpbrushlist.h"
#include "gimprc.h"
#include "gradient_header.h"
#include "interface.h"
#include "tools.h"
#include "libgimp/gimplimits.h"
#define DRAG_PREVIEW_SIZE 32
#define DRAG_ICON_OFFSET -8
typedef enum
{
GIMP_DND_DATA_COLOR = 1,
GIMP_DND_DATA_BRUSH,
GIMP_DND_DATA_PATTERN,
GIMP_DND_DATA_GRADIENT,
GIMP_DND_DATA_PALETTE,
GIMP_DND_DATA_TOOL,
GIMP_DND_DATA_LAST = GIMP_DND_DATA_TOOL
} GimpDndDataType;
typedef GtkWidget * (* GimpDndGetIconFunc) (GtkWidget *widget,
GtkSignalFunc get_data_func,
gpointer get_data_data);
typedef guchar * (* GimpDndDragDataFunc) (GtkWidget *widget,
GtkSignalFunc get_data_func,
gpointer get_data_data,
gint *format,
gint *length);
typedef void (* GimpDndDropDataFunc) (GtkWidget *widget,
GtkSignalFunc set_data_func,
gpointer set_data_data,
guchar *vals,
gint format,
gint length);
typedef struct _GimpDndDataDef GimpDndDataDef;
struct _GimpDndDataDef
{
GtkTargetEntry target_entry;
gchar *set_data_func_name;
gchar *set_data_data_name;
GimpDndGetIconFunc get_icon_func;
GimpDndDragDataFunc get_data_func;
GimpDndDropDataFunc set_data_func;
};
static GtkWidget * gimp_dnd_get_color_icon (GtkWidget *widget,
GtkSignalFunc get_color_func,
gpointer get_color_data);
static GtkWidget * gimp_dnd_get_brush_icon (GtkWidget *widget,
GtkSignalFunc get_brush_func,
gpointer get_brush_data);
static GtkWidget * gimp_dnd_get_pattern_icon (GtkWidget *widget,
GtkSignalFunc get_pattern_func,
gpointer get_pattern_data);
static GtkWidget * gimp_dnd_get_gradient_icon (GtkWidget *widget,
GtkSignalFunc get_gradient_func,
gpointer get_gradient_data);
static GtkWidget * gimp_dnd_get_palette_icon (GtkWidget *widget,
GtkSignalFunc get_gradient_func,
gpointer get_gradient_data);
static GtkWidget * gimp_dnd_get_tool_icon (GtkWidget *widget,
GtkSignalFunc get_tool_func,
gpointer get_tool_data);
static guchar * gimp_dnd_get_color_data (GtkWidget *widget,
GtkSignalFunc get_color_func,
gpointer get_color_data,
gint *format,
gint *length);
static guchar * gimp_dnd_get_brush_data (GtkWidget *widget,
GtkSignalFunc get_brush_func,
gpointer get_brush_data,
gint *format,
gint *length);
static guchar * gimp_dnd_get_pattern_data (GtkWidget *widget,
GtkSignalFunc get_pattern_func,
gpointer get_pattern_data,
gint *format,
gint *length);
static guchar * gimp_dnd_get_gradient_data (GtkWidget *widget,
GtkSignalFunc get_gradient_func,
gpointer get_gradient_data,
gint *format,
gint *length);
static guchar * gimp_dnd_get_palette_data (GtkWidget *widget,
GtkSignalFunc get_gradient_func,
gpointer get_gradient_data,
gint *format,
gint *length);
static guchar * gimp_dnd_get_tool_data (GtkWidget *widget,
GtkSignalFunc get_tool_func,
gpointer get_tool_data,
gint *format,
gint *length);
static void gimp_dnd_set_color_data (GtkWidget *widget,
GtkSignalFunc set_color_func,
gpointer set_color_data,
guchar *vals,
gint format,
gint length);
static void gimp_dnd_set_brush_data (GtkWidget *widget,
GtkSignalFunc set_brush_func,
gpointer set_brush_data,
guchar *vals,
gint format,
gint length);
static void gimp_dnd_set_pattern_data (GtkWidget *widget,
GtkSignalFunc set_pattern_func,
gpointer set_pattern_data,
guchar *vals,
gint format,
gint length);
static void gimp_dnd_set_gradient_data (GtkWidget *widget,
GtkSignalFunc set_gradient_func,
gpointer set_gradient_data,
guchar *vals,
gint format,
gint length);
static void gimp_dnd_set_palette_data (GtkWidget *widget,
GtkSignalFunc set_gradient_func,
gpointer set_gradient_data,
guchar *vals,
gint format,
gint length);
static void gimp_dnd_set_tool_data (GtkWidget *widget,
GtkSignalFunc set_tool_func,
gpointer set_tool_data,
guchar *vals,
gint format,
gint length);
static GimpDndDataDef dnd_data_defs[] =
{
{
{ NULL, 0, -1 },
NULL,
NULL,
NULL,
NULL,
},
{
GIMP_TARGET_COLOR,
"gimp_dnd_set_color_func",
"gimp_dnd_set_color_data",
gimp_dnd_get_color_icon,
gimp_dnd_get_color_data,
gimp_dnd_set_color_data
},
{
GIMP_TARGET_BRUSH,
"gimp_dnd_set_brush_func",
"gimp_dnd_set_brush_data",
gimp_dnd_get_brush_icon,
gimp_dnd_get_brush_data,
gimp_dnd_set_brush_data
},
{
GIMP_TARGET_PATTERN,
"gimp_dnd_set_pattern_func",
"gimp_dnd_set_pattern_data",
gimp_dnd_get_pattern_icon,
gimp_dnd_get_pattern_data,
gimp_dnd_set_pattern_data
},
{
GIMP_TARGET_GRADIENT,
"gimp_dnd_set_gradient_func",
"gimp_dnd_set_gradient_data",
gimp_dnd_get_gradient_icon,
gimp_dnd_get_gradient_data,
gimp_dnd_set_gradient_data
},
{
GIMP_TARGET_PALETTE,
"gimp_dnd_set_palette_func",
"gimp_dnd_set_palette_data",
gimp_dnd_get_palette_icon,
gimp_dnd_get_palette_data,
gimp_dnd_set_palette_data
},
{
GIMP_TARGET_TOOL,
"gimp_dnd_set_tool_func",
"gimp_dnd_set_tool_data",
gimp_dnd_get_tool_icon,
gimp_dnd_get_tool_data,
gimp_dnd_set_tool_data
}
};
/********************************/
/* general data dnd functions */
/********************************/
static void
gimp_dnd_data_drag_begin (GtkWidget *widget,
GdkDragContext *context,
gpointer data)
{
GimpDndDataType data_type;
GtkSignalFunc get_data_func;
gpointer get_data_data;
GtkWidget *icon_widget;
data_type =
(GimpDndDataType) gtk_object_get_data (GTK_OBJECT (widget),
"gimp_dnd_get_data_type");
if (! data_type)
return;
get_data_func =
(GtkSignalFunc) gtk_object_get_data (GTK_OBJECT (widget),
"gimp_dnd_get_data_func");
get_data_data =
(gpointer) gtk_object_get_data (GTK_OBJECT (widget),
"gimp_dnd_get_data_data");
if (! get_data_func)
return;
icon_widget = (* dnd_data_defs[data_type].get_icon_func) (widget,
get_data_func,
get_data_data);
if (icon_widget)
{
GtkWidget *frame;
GtkWidget *window;
window = gtk_window_new (GTK_WINDOW_POPUP);
gtk_widget_realize (window);
frame = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_OUT);
gtk_container_add (GTK_CONTAINER (window), frame);
gtk_widget_show (frame);
gtk_container_add (GTK_CONTAINER (frame), icon_widget);
gtk_widget_show (icon_widget);
gtk_object_set_data_full (GTK_OBJECT (widget),
"gimp-dnd-data-widget",
window,
(GtkDestroyNotify) gtk_widget_destroy);
gtk_drag_set_icon_widget (context, window,
DRAG_ICON_OFFSET, DRAG_ICON_OFFSET);
}
}
static void
gimp_dnd_data_drag_end (GtkWidget *widget,
GdkDragContext *context)
{
gtk_object_set_data (GTK_OBJECT (widget),
"gimp-dnd-data-widget", NULL);
}
static void
gimp_dnd_data_drag_handle (GtkWidget *widget,
GdkDragContext *context,
GtkSelectionData *selection_data,
guint info,
guint time,
gpointer data)
{
GimpDndDataType data_type;
GtkSignalFunc get_data_func;
gpointer get_data_data;
gint format;
guchar *vals;
gint length;
data_type =
(GimpDndDataType) gtk_object_get_data (GTK_OBJECT (widget),
"gimp_dnd_get_data_type");
if (! data_type)
return;
get_data_func =
(GtkSignalFunc) gtk_object_get_data (GTK_OBJECT (widget),
"gimp_dnd_get_data_func");
get_data_data =
(gpointer) gtk_object_get_data (GTK_OBJECT (widget),
"gimp_dnd_get_data_data");
if (! get_data_func)
return;
vals = (* dnd_data_defs[data_type].get_data_func) (widget,
get_data_func,
get_data_data,
&format,
&length);
if (vals)
{
gtk_selection_data_set
(selection_data,
gdk_atom_intern (dnd_data_defs[data_type].target_entry.target, FALSE),
format, vals, length);
g_free (vals);
}
}
static void
gimp_dnd_data_drop_handle (GtkWidget *widget,
GdkDragContext *context,
gint x,
gint y,
GtkSelectionData *selection_data,
guint info,
guint time,
gpointer data)
{
GtkSignalFunc set_data_func;
gpointer set_data_data;
GimpDndDataType data_type;
if (selection_data->length < 0)
return;
for (data_type = GIMP_DND_DATA_COLOR;
data_type <= GIMP_DND_DATA_LAST;
data_type++)
{
if (dnd_data_defs[data_type].target_entry.info == info)
{
set_data_func = (GtkSignalFunc)
gtk_object_get_data (GTK_OBJECT (widget),
dnd_data_defs[data_type].set_data_func_name);
set_data_data = (gpointer)
gtk_object_get_data (GTK_OBJECT (widget),
dnd_data_defs[data_type].set_data_data_name);
if (! set_data_func)
return;
(* dnd_data_defs[data_type].set_data_func) (widget,
set_data_func,
set_data_data,
selection_data->data,
selection_data->format,
selection_data->length);
return;
}
}
}
static void
gimp_dnd_data_source_set (GimpDndDataType data_type,
GtkWidget *widget,
GtkSignalFunc get_data_func,
gpointer get_data_data)
{
gboolean drag_connected;
drag_connected =
(gboolean) gtk_object_get_data (GTK_OBJECT (widget),
"gimp_dnd_drag_connected");
if (! drag_connected)
{
gtk_signal_connect (GTK_OBJECT (widget), "drag_begin",
GTK_SIGNAL_FUNC (gimp_dnd_data_drag_begin),
NULL);
gtk_signal_connect (GTK_OBJECT (widget), "drag_end",
GTK_SIGNAL_FUNC (gimp_dnd_data_drag_end),
NULL);
gtk_signal_connect (GTK_OBJECT (widget), "drag_data_get",
GTK_SIGNAL_FUNC (gimp_dnd_data_drag_handle),
NULL);
gtk_object_set_data (GTK_OBJECT (widget), "gimp_dnd_drag_connected",
(gpointer) TRUE);
}
gtk_object_set_data (GTK_OBJECT (widget), "gimp_dnd_get_data_type",
(gpointer) data_type);
gtk_object_set_data (GTK_OBJECT (widget), "gimp_dnd_get_data_func",
get_data_func);
gtk_object_set_data (GTK_OBJECT (widget), "gimp_dnd_get_data_data",
get_data_data);
}
static void
gimp_dnd_data_dest_set (GimpDndDataType data_type,
GtkWidget *widget,
gpointer set_data_func,
gpointer set_data_data)
{
gboolean drop_connected;
drop_connected =
(gboolean) gtk_object_get_data (GTK_OBJECT (widget),
"gimp_dnd_drop_connected");
if (! drop_connected)
{
gtk_signal_connect (GTK_OBJECT (widget), "drag_data_received",
GTK_SIGNAL_FUNC (gimp_dnd_data_drop_handle),
NULL);
gtk_object_set_data (GTK_OBJECT (widget), "gimp_dnd_drop_connected",
(gpointer) TRUE);
}
gtk_object_set_data (GTK_OBJECT (widget),
dnd_data_defs[data_type].set_data_func_name,
set_data_func);
gtk_object_set_data (GTK_OBJECT (widget),
dnd_data_defs[data_type].set_data_data_name,
set_data_data);
}
/*************************/
/* color dnd functions */
/*************************/
static GtkWidget *
gimp_dnd_get_color_icon (GtkWidget *widget,
GtkSignalFunc get_color_func,
gpointer get_color_data)
{
GtkWidget *preview;
guchar r, g, b;
guchar row[DRAG_PREVIEW_SIZE * 3];
gint i;
(* (GimpDndDragColorFunc) get_color_func) (widget, &r, &g, &b,
get_color_data);
for (i = 0; i < DRAG_PREVIEW_SIZE; i++)
{
row[i * 3] = r;
row[i * 3 + 1] = g;
row[i * 3 + 2] = b;
}
preview = gtk_preview_new (GTK_PREVIEW_COLOR);
gtk_preview_size (GTK_PREVIEW (preview),
DRAG_PREVIEW_SIZE, DRAG_PREVIEW_SIZE);
for (i = 0; i < DRAG_PREVIEW_SIZE; i++)
{
gtk_preview_draw_row (GTK_PREVIEW (preview), row,
0, i, DRAG_PREVIEW_SIZE);
}
return preview;
}
static guchar *
gimp_dnd_get_color_data (GtkWidget *widget,
GtkSignalFunc get_color_func,
gpointer get_color_data,
gint *format,
gint *length)
{
guint16 *vals;
guchar r, g, b;
(* (GimpDndDragColorFunc) get_color_func) (widget, &r, &g, &b,
get_color_data);
vals = g_new (guint16, 4);
vals[0] = r + (r << 8);
vals[1] = g + (g << 8);
vals[2] = b + (b << 8);
vals[3] = 0xffff;
*format = 16;
*length = 8;
return (guchar *) vals;
}
static void
gimp_dnd_set_color_data (GtkWidget *widget,
GtkSignalFunc set_color_func,
gpointer set_color_data,
guchar *vals,
gint format,
gint length)
{
guint16 *color_vals;
guchar r, g, b;
if ((format != 16) || (length != 8))
{
g_warning ("Received invalid color data\n");
return;
}
color_vals = (guint16 *) vals;
r = color_vals[0] >> 8;
g = color_vals[1] >> 8;
b = color_vals[2] >> 8;
(* (GimpDndDropColorFunc) set_color_func) (widget, r, g, b,
set_color_data);
}
void
gimp_dnd_color_source_set (GtkWidget *widget,
GimpDndDragColorFunc get_color_func,
gpointer data)
{
gimp_dnd_data_source_set (GIMP_DND_DATA_COLOR, widget,
GTK_SIGNAL_FUNC (get_color_func),
data);
}
void
gimp_dnd_color_dest_set (GtkWidget *widget,
GimpDndDropColorFunc set_color_func,
gpointer data)
{
gimp_dnd_data_dest_set (GIMP_DND_DATA_COLOR, widget,
GTK_SIGNAL_FUNC (set_color_func),
data);
}
/*************************/
/* brush dnd functions */
/*************************/
static GtkWidget *
gimp_dnd_get_brush_icon (GtkWidget *widget,
GtkSignalFunc get_brush_func,
gpointer get_brush_data)
{
GtkWidget *preview;
GimpBrush *brush;
brush = (* (GimpDndDragBrushFunc) get_brush_func) (widget, get_brush_data);
if (! brush)
return NULL;
preview = gtk_preview_new (GTK_PREVIEW_COLOR);
gtk_preview_size (GTK_PREVIEW (preview),
DRAG_PREVIEW_SIZE, DRAG_PREVIEW_SIZE);
draw_brush (GTK_PREVIEW (preview), brush,
DRAG_PREVIEW_SIZE, DRAG_PREVIEW_SIZE, FALSE);
return preview;
}
static guchar *
gimp_dnd_get_brush_data (GtkWidget *widget,
GtkSignalFunc get_brush_func,
gpointer get_brush_data,
gint *format,
gint *length)
{
GimpBrush *brush;
gchar *name;
brush = (* (GimpDndDragBrushFunc) get_brush_func) (widget, get_brush_data);
if (! brush)
return NULL;
name = g_strdup (gimp_brush_get_name (brush));
if (! name)
return NULL;
*format = 8;
*length = strlen (name) + 1;
return (guchar *) name;
}
static void
gimp_dnd_set_brush_data (GtkWidget *widget,
GtkSignalFunc set_brush_func,
gpointer set_brush_data,
guchar *vals,
gint format,
gint length)
{
GimpBrush *brush;
gchar *name;
if ((format != 8) || (length < 1))
{
g_warning ("Received invalid brush data\n");
return;
}
name = (gchar *) vals;
if (strcmp (name, "Standard") == 0)
brush = brushes_get_standard_brush ();
else
brush = gimp_brush_list_get_brush (brush_list, name);
if (brush)
(* (GimpDndDropBrushFunc) set_brush_func) (widget, brush, set_brush_data);
}
void
gimp_dnd_brush_source_set (GtkWidget *widget,
GimpDndDragBrushFunc get_brush_func,
gpointer data)
{
gimp_dnd_data_source_set (GIMP_DND_DATA_BRUSH, widget,
GTK_SIGNAL_FUNC (get_brush_func),
data);
}
void
gimp_dnd_brush_dest_set (GtkWidget *widget,
GimpDndDropBrushFunc set_brush_func,
gpointer data)
{
gimp_dnd_data_dest_set (GIMP_DND_DATA_BRUSH, widget,
GTK_SIGNAL_FUNC (set_brush_func),
data);
}
/***************************/
/* pattern dnd functions */
/***************************/
static GtkWidget *
gimp_dnd_get_pattern_icon (GtkWidget *widget,
GtkSignalFunc get_pattern_func,
gpointer get_pattern_data)
{
GtkWidget *preview;
GPattern *pattern;
pattern = (* (GimpDndDragPatternFunc) get_pattern_func) (widget,
get_pattern_data);
if (! pattern)
return NULL;
preview = gtk_preview_new (GTK_PREVIEW_COLOR);
gtk_preview_size (GTK_PREVIEW (preview),
DRAG_PREVIEW_SIZE, DRAG_PREVIEW_SIZE);
draw_pattern (GTK_PREVIEW (preview), pattern,
DRAG_PREVIEW_SIZE, DRAG_PREVIEW_SIZE);
return preview;
}
static guchar *
gimp_dnd_get_pattern_data (GtkWidget *widget,
GtkSignalFunc get_pattern_func,
gpointer get_pattern_data,
gint *format,
gint *length)
{
GPattern *pattern;
gchar *name;
pattern = (* (GimpDndDragPatternFunc) get_pattern_func) (widget,
get_pattern_data);
if (! pattern)
return NULL;
name = g_strdup (pattern->name);
*format = 8;
*length = strlen (name) + 1;
return (guchar *) name;
}
static void
gimp_dnd_set_pattern_data (GtkWidget *widget,
GtkSignalFunc set_pattern_func,
gpointer set_pattern_data,
guchar *vals,
gint format,
gint length)
{
GPattern *pattern;
gchar *name;
if ((format != 8) || (length < 1))
{
g_warning ("Received invalid pattern data\n");
return;
}
name = (gchar *) vals;
if (strcmp (name, "Standard") == 0)
pattern = patterns_get_standard_pattern ();
else
pattern = pattern_list_get_pattern (pattern_list, name);
if (pattern)
(* (GimpDndDropPatternFunc) set_pattern_func) (widget, pattern,
set_pattern_data);
}
void
gimp_dnd_pattern_source_set (GtkWidget *widget,
GimpDndDragPatternFunc get_pattern_func,
gpointer data)
{
gimp_dnd_data_source_set (GIMP_DND_DATA_PATTERN, widget,
GTK_SIGNAL_FUNC (get_pattern_func),
data);
}
void
gimp_dnd_pattern_dest_set (GtkWidget *widget,
GimpDndDropPatternFunc set_pattern_func,
gpointer data)
{
gimp_dnd_data_dest_set (GIMP_DND_DATA_PATTERN, widget,
GTK_SIGNAL_FUNC (set_pattern_func),
data);
}
/****************************/
/* gradient dnd functions */
/****************************/
static GtkWidget *
gimp_dnd_get_gradient_icon (GtkWidget *widget,
GtkSignalFunc get_gradient_func,
gpointer get_gradient_data)
{
GtkWidget *preview;
gradient_t *gradient;
gradient =
(* (GimpDndDragGradientFunc) get_gradient_func) (widget, get_gradient_data);
if (! gradient)
return NULL;
preview = gtk_preview_new (GTK_PREVIEW_COLOR);
gtk_preview_size (GTK_PREVIEW (preview),
DRAG_PREVIEW_SIZE * 2, DRAG_PREVIEW_SIZE / 2);
draw_gradient (GTK_PREVIEW (preview), gradient,
DRAG_PREVIEW_SIZE * 2, DRAG_PREVIEW_SIZE / 2);
return preview;
}
static guchar *
gimp_dnd_get_gradient_data (GtkWidget *widget,
GtkSignalFunc get_gradient_func,
gpointer get_gradient_data,
gint *format,
gint *length)
{
gradient_t *gradient;
gchar *name;
gradient =
(* (GimpDndDragGradientFunc) get_gradient_func) (widget, get_gradient_data);
if (! gradient)
return NULL;
name = g_strdup (gradient->name);
*format = 8;
*length = strlen (name) + 1;
return (guchar *) name;
}
static void
gimp_dnd_set_gradient_data (GtkWidget *widget,
GtkSignalFunc set_gradient_func,
gpointer set_gradient_data,
guchar *vals,
gint format,
gint length)
{
gradient_t *gradient;
gchar *name;
if ((format != 8) || (length < 1))
{
g_warning ("Received invalid gradient data\n");
return;
}
name = (gchar *) vals;
if (strcmp (name, "Standard") == 0)
gradient = gradients_get_standard_gradient ();
else
gradient = gradient_list_get_gradient (gradients_list, name);
if (gradient)
(* (GimpDndDropGradientFunc) set_gradient_func) (widget, gradient,
set_gradient_data);
}
void
gimp_dnd_gradient_source_set (GtkWidget *widget,
GimpDndDragGradientFunc get_gradient_func,
gpointer data)
{
gimp_dnd_data_source_set (GIMP_DND_DATA_GRADIENT, widget,
GTK_SIGNAL_FUNC (get_gradient_func),
data);
}
void
gimp_dnd_gradient_dest_set (GtkWidget *widget,
GimpDndDropGradientFunc set_gradient_func,
gpointer data)
{
gimp_dnd_data_dest_set (GIMP_DND_DATA_GRADIENT, widget,
GTK_SIGNAL_FUNC (set_gradient_func),
data);
}
/***************************/
/* palette dnd functions */
/***************************/
static GtkWidget *
gimp_dnd_get_palette_icon (GtkWidget *widget,
GtkSignalFunc get_gradient_func,
gpointer get_gradient_data)
{
return NULL;
}
static guchar *
gimp_dnd_get_palette_data (GtkWidget *widget,
GtkSignalFunc get_gradient_func,
gpointer get_gradient_data,
gint *format,
gint *length)
{
return NULL;
}
static void
gimp_dnd_set_palette_data (GtkWidget *widget,
GtkSignalFunc set_gradient_func,
gpointer set_gradient_data,
guchar *vals,
gint format,
gint length)
{
}
void
gimp_dnd_palette_source_set (GtkWidget *widget,
GimpDndDragPaletteFunc get_palette_func,
gpointer data)
{
gimp_dnd_data_source_set (GIMP_DND_DATA_PALETTE, widget,
GTK_SIGNAL_FUNC (get_palette_func),
data);
}
void
gimp_dnd_palette_dest_set (GtkWidget *widget,
GimpDndDropPaletteFunc set_palette_func,
gpointer data)
{
gimp_dnd_data_dest_set (GIMP_DND_DATA_PALETTE, widget,
GTK_SIGNAL_FUNC (set_palette_func),
data);
}
/************************/
/* tool dnd functions */
/************************/
static GtkWidget *
gimp_dnd_get_tool_icon (GtkWidget *widget,
GtkSignalFunc get_tool_func,
gpointer get_tool_data)
{
GtkWidget *tool_icon;
ToolType tool_type;
tool_type =
(* (GimpDndDragToolFunc) get_tool_func) (widget, get_tool_data);
if (((gint) tool_type < 0) || ((gint) tool_type >= num_tools))
return NULL;
tool_icon = gtk_pixmap_new (tool_get_pixmap (tool_type),
tool_get_mask (tool_type));
return tool_icon;
}
static guchar *
gimp_dnd_get_tool_data (GtkWidget *widget,
GtkSignalFunc get_tool_func,
gpointer get_tool_data,
gint *format,
gint *length)
{
ToolType tool_type;
guint16 *val;
tool_type =
(* (GimpDndDragToolFunc) get_tool_func) (widget, get_tool_data);
if (((gint) tool_type < 0) || ((gint) tool_type >= num_tools))
return NULL;
val = g_new (guint16, 1);
val[0] = (guint16) tool_type;
*format = 16;
*length = 2;
return (guchar *) val;
}
static void
gimp_dnd_set_tool_data (GtkWidget *widget,
GtkSignalFunc set_tool_func,
gpointer set_tool_data,
guchar *vals,
gint format,
gint length)
{
ToolType tool_type;
guint16 val;
if ((format != 16) || (length != 2))
{
g_warning ("Received invalid tool data\n");
return;
}
val = *((guint16 *) vals);
tool_type = (ToolType) val;
if (((gint) tool_type < 0) || ((gint) tool_type >= num_tools))
return;
(* (GimpDndDropToolFunc) set_tool_func) (widget, tool_type, set_tool_data);
}
void
gimp_dnd_tool_source_set (GtkWidget *widget,
GimpDndDragToolFunc get_tool_func,
gpointer data)
{
gimp_dnd_data_source_set (GIMP_DND_DATA_TOOL, widget,
GTK_SIGNAL_FUNC (get_tool_func),
data);
}
void
gimp_dnd_tool_dest_set (GtkWidget *widget,
GimpDndDropToolFunc set_tool_func,
gpointer data)
{
gimp_dnd_data_dest_set (GIMP_DND_DATA_TOOL, widget,
GTK_SIGNAL_FUNC (set_tool_func),
data);
}
/****************************/
/* drawable dnd functions */
/****************************/
void
gimp_dnd_set_drawable_preview_icon (GtkWidget *widget,
GdkDragContext *context,
GimpDrawable *drawable,
GdkGC *gc)
{
GtkWidget *window;
GtkWidget *frame;
GtkWidget *preview;
gboolean drag_connected;
TempBuf *tmpbuf;
gint bpp;
gint x, y;
guchar *src;
gdouble r, g, b, a;
gdouble c0, c1;
guchar *p0, *p1, *even, *odd;
gint width;
gint height;
gdouble ratio;
if (! preview_size)
return;
if (gimp_drawable_width (drawable) > gimp_drawable_height (drawable))
ratio = (gdouble) DRAG_PREVIEW_SIZE /
(gdouble) (gimp_drawable_width (drawable));
else
ratio = (gdouble) DRAG_PREVIEW_SIZE /
(gdouble) (gimp_drawable_height (drawable));
width = (gint) (ratio * gimp_drawable_width (drawable));
height = (gint) (ratio * gimp_drawable_height (drawable));
if (width < 1)
width = 1;
if (height < 1)
height = 1;
preview = gtk_preview_new (GTK_PREVIEW_COLOR);
gtk_preview_size (GTK_PREVIEW (preview), width, height);
if (GIMP_IS_LAYER (drawable))
{
tmpbuf = layer_preview (GIMP_LAYER (drawable), width, height);
}
else if (GIMP_IS_LAYER_MASK (drawable))
{
tmpbuf =
layer_mask_preview (layer_mask_get_layer (GIMP_LAYER_MASK (drawable)),
width, height);
}
else if (GIMP_IS_CHANNEL (drawable))
{
tmpbuf = channel_preview (GIMP_CHANNEL (drawable), width, height);
}
else
{
gtk_widget_destroy (preview);
return;
}
bpp = tmpbuf->bytes;
/* Draw the thumbnail with checks */
src = temp_buf_data (tmpbuf);
even = g_new (guchar, width * 3);
odd = g_new (guchar, width * 3);
for (y = 0; y < height; y++)
{
p0 = even;
p1 = odd;
for (x = 0; x < width; x++)
{
if (bpp == 4)
{
r = ((gdouble) src[x*4+0]) / 255.0;
g = ((gdouble) src[x*4+1]) / 255.0;
b = ((gdouble) src[x*4+2]) / 255.0;
a = ((gdouble) src[x*4+3]) / 255.0;
}
else if (bpp == 3)
{
r = ((gdouble) src[x*3+0]) / 255.0;
g = ((gdouble) src[x*3+1]) / 255.0;
b = ((gdouble) src[x*3+2]) / 255.0;
a = 1.0;
}
else
{
r = ((gdouble) src[x*bpp+0]) / 255.0;
g = b = r;
if (bpp == 2)
a = ((gdouble) src[x*bpp+1]) / 255.0;
else
a = 1.0;
}
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;
}
if ((y / GIMP_CHECK_SIZE_SM) & 1)
{
gtk_preview_draw_row (GTK_PREVIEW (preview), odd,
0, y, width);
}
else
{
gtk_preview_draw_row (GTK_PREVIEW (preview), even,
0, y, width);
}
src += width * bpp;
}
g_free (even);
g_free (odd);
window = gtk_window_new (GTK_WINDOW_POPUP);
gtk_widget_realize (window);
frame = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_OUT);
gtk_container_add (GTK_CONTAINER (window), frame);
gtk_widget_show (frame);
gtk_container_add (GTK_CONTAINER (frame), preview);
gtk_widget_show (preview);
drag_connected =
(gboolean) gtk_object_get_data (GTK_OBJECT (widget),
"gimp_dnd_drag_connected");
if (! drag_connected)
{
gtk_signal_connect (GTK_OBJECT (widget), "drag_end",
GTK_SIGNAL_FUNC (gimp_dnd_data_drag_end),
NULL);
gtk_object_set_data (GTK_OBJECT (widget), "gimp_dnd_drag_connected",
(gpointer) TRUE);
}
gtk_object_set_data_full (GTK_OBJECT (widget),
"gimp-dnd-data-widget",
window,
(GtkDestroyNotify) gtk_widget_destroy);
gtk_drag_set_icon_widget (context, window,
DRAG_ICON_OFFSET, DRAG_ICON_OFFSET);
}
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