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gimp/libgimp/gimpchainbutton.c

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/* LIBGIMP - The GIMP Library
* Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library 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 Library 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 "gimpchainbutton.h"
#include "pixmaps/chain.xpm"
static char **gimp_chain_xpm[] = {
chain_hor_xpm,
chain_ver_xpm
};
static char **gimp_chain_broken_xpm[] = {
chain_broken_hor_xpm,
chain_broken_ver_xpm
};
static void gimp_chain_button_destroy (GtkObject *object);
static void gimp_chain_button_realize_callback (GtkWidget *widget, GimpChainButton *gcb);
static void gimp_chain_button_clicked_callback (GtkWidget *widget, GimpChainButton *gcb);
static void gimp_chain_button_draw_lines (GtkWidget *widget,
GdkEvent* event,
GimpChainButton *gcb);
static GtkWidgetClass *parent_class = NULL;
static void
gimp_chain_button_destroy (GtkObject *object)
{
GimpChainButton *gcb;
g_return_if_fail (gcb = GIMP_CHAIN_BUTTON (object));
if (gcb->broken)
gdk_pixmap_unref (gcb->broken);
if (gcb->broken_mask)
gdk_bitmap_unref (gcb->broken_mask);
if (gcb->chain)
gdk_pixmap_unref (gcb->chain);
if (gcb->chain_mask)
gdk_bitmap_unref (gcb->chain_mask);
if (GTK_OBJECT_CLASS (parent_class)->destroy)
(* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
}
static void
gimp_chain_button_class_init (GimpChainButtonClass *class)
{
GtkObjectClass *object_class;
object_class = (GtkObjectClass*) class;
parent_class = gtk_type_class (gtk_widget_get_type ());
object_class->destroy = gimp_chain_button_destroy;
}
static void
gimp_chain_button_init (GimpChainButton *gcb)
{
gcb->position = GIMP_CHAIN_TOP;
gcb->button = gtk_button_new ();
gcb->line1 = gtk_drawing_area_new ();
gcb->line2 = gtk_drawing_area_new ();
gcb->pixmap = NULL;
gcb->broken = NULL;
gcb->broken_mask = NULL;
gcb->chain = NULL;
gcb->chain_mask = NULL;
gcb->active = FALSE;
gtk_signal_connect (GTK_OBJECT(gcb->button), "clicked",
GTK_SIGNAL_FUNC (gimp_chain_button_clicked_callback), gcb);
/* That's all we do here, since setting the pixmaps won't work before
the parent window is realized.
We connect to the realized-signal instead and do the rest there. */
gtk_signal_connect (GTK_OBJECT(gcb), "realize",
GTK_SIGNAL_FUNC(gimp_chain_button_realize_callback), gcb);
gtk_signal_connect (GTK_OBJECT(gcb->line1), "expose_event",
GTK_SIGNAL_FUNC(gimp_chain_button_draw_lines), gcb);
gtk_signal_connect (GTK_OBJECT(gcb->line2), "expose_event",
GTK_SIGNAL_FUNC(gimp_chain_button_draw_lines), gcb);
}
GtkType
gimp_chain_button_get_type (void)
{
static guint gcb_type = 0;
if (!gcb_type)
{
GtkTypeInfo gcb_info =
{
"GimpChainButton",
sizeof (GimpChainButton),
sizeof (GimpChainButtonClass),
(GtkClassInitFunc) gimp_chain_button_class_init,
(GtkObjectInitFunc) gimp_chain_button_init,
/* reserved_1 */ NULL,
/* reserved_2 */ NULL,
(GtkClassInitFunc) NULL
};
gcb_type = gtk_type_unique (gtk_table_get_type (), &gcb_info);
}
return gcb_type;
}
GtkWidget*
gimp_chain_button_new (GimpChainPosition position)
{
GimpChainButton *gcb;
gcb = gtk_type_new (gimp_chain_button_get_type ());
gcb->position = position;
if (position & GIMP_CHAIN_LEFT) /* are we a vertical chainbutton? */
{
gtk_table_resize (GTK_TABLE (gcb), 3, 1);
gtk_table_attach (GTK_TABLE (gcb), gcb->button, 0, 1, 1, 2,
GTK_SHRINK, GTK_SHRINK, 0, 0);
gtk_table_attach_defaults (GTK_TABLE (gcb), gcb->line1, 0, 1, 0, 1);
gtk_table_attach_defaults (GTK_TABLE (gcb), gcb->line2, 0, 1, 2, 3);
}
else
{
gtk_table_resize (GTK_TABLE (gcb), 1, 3);
gtk_table_attach (GTK_TABLE (gcb), gcb->button, 1, 2, 0, 1,
GTK_SHRINK, GTK_SHRINK, 0, 0);
gtk_table_attach_defaults (GTK_TABLE (gcb), gcb->line1, 0, 1, 0, 1);
gtk_table_attach_defaults (GTK_TABLE (gcb), gcb->line2, 2, 3, 0, 1);
}
gtk_widget_show (gcb->line1);
gtk_widget_show (gcb->line2);
gtk_button_set_relief (GTK_BUTTON (gcb->button), GTK_RELIEF_NONE);
return (GTK_WIDGET(gcb));
}
static void
gimp_chain_button_realize_callback (GtkWidget *widget,
GimpChainButton *gcb)
{
GtkStyle *style;
GtkWidget *parent;
parent = GTK_WIDGET(gcb)->parent;
if (!GTK_WIDGET_REALIZED (parent))
return;
style = gtk_widget_get_style (parent);
gcb->chain = gdk_pixmap_create_from_xpm_d (parent->window,
&gcb->chain_mask,
&style->bg[GTK_STATE_NORMAL],
gimp_chain_xpm[gcb->position % 2]);
gcb->broken = gdk_pixmap_create_from_xpm_d (parent->window,
&gcb->broken_mask,
&style->bg[GTK_STATE_NORMAL],
gimp_chain_broken_xpm[gcb->position % 2]);
if (gcb->active)
gcb->pixmap = gtk_pixmap_new (gcb->chain, gcb->chain_mask);
else
gcb->pixmap = gtk_pixmap_new (gcb->broken, gcb->broken_mask);
gtk_container_add (GTK_CONTAINER (gcb->button), gcb->pixmap);
gtk_widget_show (gcb->pixmap);
gtk_widget_show (gcb->button);
}
static void
gimp_chain_button_clicked_callback (GtkWidget *widget,
GimpChainButton *gcb)
{
g_return_if_fail (gcb != NULL);
g_return_if_fail (GIMP_IS_CHAIN_BUTTON (gcb));
gcb->active = !(gcb->active);
if (!GTK_WIDGET_REALIZED (GTK_WIDGET(gcb)))
return;
if (gcb->active)
gtk_pixmap_set (GTK_PIXMAP(gcb->pixmap), gcb->chain, gcb->chain_mask);
else
gtk_pixmap_set (GTK_PIXMAP(gcb->pixmap), gcb->broken, gcb->broken_mask);
}
static void
gimp_chain_button_draw_lines (GtkWidget *widget,
GdkEvent *event,
GimpChainButton *gcb)
{
GdkPoint points[3];
GdkPoint buf;
GtkShadowType shadow;
gint which_line;
#define SHORT_LINE 4
/* don't set this too high, there's no check against drawing outside
the widgets bounds yet (and probably never will be) */
g_return_if_fail (gcb != NULL);
g_return_if_fail (GIMP_IS_CHAIN_BUTTON (gcb));
if (event); /* avoid unused variable compiler warning */
gdk_window_clear_area (widget->window,
0, 0,
widget->allocation.width,
widget->allocation.height);
points[0].x = widget->allocation.width / 2;
points[0].y = widget->allocation.height / 2;
which_line = (widget == gcb->line1) ? 1 : -1;
switch (gcb->position)
{
case GIMP_CHAIN_LEFT:
points[0].x += SHORT_LINE;
points[1].x = points[0].x - SHORT_LINE;
points[1].y = points[0].y;
points[2].x = points[1].x;
points[2].y = (which_line == 1) ? widget->allocation.height - 1 : 0;
shadow = GTK_SHADOW_ETCHED_IN;
break;
case GIMP_CHAIN_RIGHT:
points[0].x -= SHORT_LINE;
points[1].x = points[0].x + SHORT_LINE;
points[1].y = points[0].y;
points[2].x = points[1].x;
points[2].y = (which_line == 1) ? widget->allocation.height - 1 : 0;
shadow = GTK_SHADOW_ETCHED_OUT;
break;
case GIMP_CHAIN_TOP:
points[0].y += SHORT_LINE;
points[1].x = points[0].x;
points[1].y = points[0].y - SHORT_LINE;
points[2].x = (which_line == 1) ? widget->allocation.width - 1 : 0;
points[2].y = points[1].y;
shadow = GTK_SHADOW_ETCHED_OUT;
break;
case GIMP_CHAIN_BOTTOM:
points[0].y -= SHORT_LINE;
points[1].x = points[0].x;
points[1].y = points[0].y + SHORT_LINE;
points[2].x = (which_line == 1) ? widget->allocation.width - 1 : 0;
points[2].y = points[1].y;
shadow = GTK_SHADOW_ETCHED_IN;
break;
default:
return;
}
if ( ((shadow == GTK_SHADOW_ETCHED_OUT) && (which_line == -1)) ||
((shadow == GTK_SHADOW_ETCHED_IN) && (which_line == 1)) )
{
buf = points[0];
points[0] = points[2];
points[2] = buf;
}
gtk_draw_polygon (widget->style,
widget->window,
GTK_STATE_NORMAL,
shadow,
points,
3,
FALSE);
}
void
gimp_chain_button_set_active (GimpChainButton *gcb,
gboolean is_active)
{
g_return_if_fail (gcb != NULL);
g_return_if_fail (GIMP_IS_CHAIN_BUTTON (gcb));
is_active = is_active != 0;
if (gcb->active != is_active)
{
gcb->active = is_active;
if (!GTK_WIDGET_REALIZED (GTK_WIDGET(gcb)))
return;
if (gcb->active)
gtk_pixmap_set (GTK_PIXMAP(gcb->pixmap), gcb->chain, gcb->chain_mask);
else
gtk_pixmap_set (GTK_PIXMAP(gcb->pixmap), gcb->broken, gcb->broken_mask);
}
}
gboolean
gimp_chain_button_get_active (GimpChainButton *gcb)
{
g_return_val_if_fail (gcb != NULL, FALSE);
g_return_val_if_fail (GIMP_IS_CHAIN_BUTTON (gcb), FALSE);
return (gcb->active) ? TRUE : FALSE;
}
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