Add FS #10214. Initial commit of the original PDa code for the GSoC Pure Data plugin project of Wincent Balin. Stripped some non-sourcefiles and added a rockbox readme that needs a bit more info from Wincent. Is added to CATEGORIES and viewers, but not yet to SUBDIRS (ie doesn't build yet)

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21044 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 802 insertions, 0 deletions

diff --git a/apps/plugins/pdbox/PDa/src/g_scalar.c b/apps/plugins/pdbox/PDa/src/g_scalar.c
new file mode 100644
index 0000000000..b3c6d824fc
--- /dev/null
+++ b/apps/plugins/pdbox/PDa/src/g_scalar.c
@@ -0,0 +1,802 @@
+/* Copyright (c) 1997-1999 Miller Puckette.
+* For information on usage and redistribution, and for a DISCLAIMER OF ALL
+* WARRANTIES, see the file, "LICENSE.txt," in this distribution.  */
+
+/* This file defines the "scalar" object, which is not a text object, just a
+"gobj".  Scalars have templates which describe their structures, which
+can contain numbers, sublists, and arrays.
+
+Also, the "tscalar" object, an ordinary text object that owns a single "scalar"
+and draws it on the parent.  This is intended as a way that abstractions can
+control their appearances by adding stuff to draw.
+*/
+
+/* IOhannes :
+ * changed the canvas_restore, so that it might accept $args as well (like "pd $0_test")
+ * so you can make multiple & distinguishable templates
+ * 1511:forum::für::umläute:2001
+ * changes marked with    IOhannes
+ * added Krzysztof Czajas fix to avoid crashing...
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>      /* for read/write to files */
+#include "m_pd.h"
+#include "g_canvas.h"
+
+t_class *scalar_class;
+
+void word_init(t_word *wp, t_template *template, t_gpointer *gp)
+{
+    int i, nitems = template->t_n;
+    t_dataslot *datatypes = template->t_vec;
+    for (i = 0; i < nitems; i++, datatypes++, wp++)
+    {
+        int type = datatypes->ds_type;
+        if (type == DT_FLOAT)
+            wp->w_float = 0; 
+        else if (type == DT_SYMBOL)
+            wp->w_symbol = &s_symbol;
+        else if (type == DT_ARRAY)
+        {
+            wp->w_array = array_new(datatypes->ds_arraytemplate, gp);
+        }
+        else if (type == DT_LIST)
+        {
+                /* LATER test this and get it to work */
+            wp->w_list = canvas_new(0, 0, 0, 0);
+        }
+    }
+}
+
+void word_restore(t_word *wp, t_template *template,
+    int argc, t_atom *argv)
+{
+    int i, nitems = template->t_n;
+    t_dataslot *datatypes = template->t_vec;
+    for (i = 0; i < nitems; i++, datatypes++, wp++)
+    {
+        int type = datatypes->ds_type;
+        if (type == DT_FLOAT)
+        {
+            float f;
+            if (argc)
+            {
+                f =  atom_getfloat(argv);
+                argv++, argc--;
+            }
+            else f = 0;
+            wp->w_float = f; 
+        }
+        else if (type == DT_SYMBOL)
+        {
+            t_symbol *s;
+            if (argc)
+            {
+                s =  atom_getsymbol(argv);
+                argv++, argc--;
+            }
+            else s = &s_;
+            wp->w_symbol = s;
+        }
+    }
+    if (argc)
+        post("warning: word_restore: extra arguments");
+}
+
+void word_free(t_word *wp, t_template *template)
+{
+    int i;
+    t_dataslot *dt;
+    for (dt = template->t_vec, i = 0; i < template->t_n; i++, dt++)
+    {
+        if (dt->ds_type == DT_ARRAY)
+            array_free(wp[i].w_array);
+        else if (dt->ds_type == DT_LIST)
+            canvas_free(wp[i].w_list);
+    }
+}
+
+    /* make a new scalar and add to the glist.  We create a "gp" here which
+    will be used for array items to point back here.  This gp doesn't do
+    reference counting or "validation" updates though; the parent won't go away
+    without the contained arrays going away too.  The "gp" is copied out
+    by value in the word_init() routine so we can throw our copy away. */
+
+t_scalar *scalar_new(t_glist *owner, t_symbol *templatesym)
+{
+    t_scalar *x;
+    t_template *template;
+    t_gpointer gp;
+    gpointer_init(&gp);
+    template = template_findbyname(templatesym);
+    if (!template)
+    {
+        error("scalar: couldn't find template %s", templatesym->s_name);
+        return (0);
+    }
+    x = (t_scalar *)getbytes(sizeof(t_scalar) +
+        (template->t_n - 1) * sizeof(*x->sc_vec));
+    x->sc_gobj.g_pd = scalar_class;
+    x->sc_template = templatesym;
+    gpointer_setglist(&gp, owner, x);
+    word_init(x->sc_vec, template, &gp);
+    return (x);
+}
+
+    /* Pd method to create a new scalar, add it to a glist, and initialize
+    it from the message arguments. */
+
+int glist_readscalar(t_glist *x, int natoms, t_atom *vec,
+    int *p_nextmsg, int selectit);
+
+void glist_scalar(t_glist *glist,
+    t_symbol *classname, t_int argc, t_atom *argv)
+{
+    t_symbol *templatesym =
+        canvas_makebindsym(atom_getsymbolarg(0, argc, argv));
+    t_binbuf *b;
+    int natoms, nextmsg = 0;
+    t_atom *vec;
+    if (!template_findbyname(templatesym))
+    {
+        pd_error(glist, "%s: no such template",
+            atom_getsymbolarg(0, argc, argv)->s_name);
+        return;
+    }
+
+    b = binbuf_new();
+    binbuf_restore(b, argc, argv);
+    natoms = binbuf_getnatom(b);
+    vec = binbuf_getvec(b);
+    
+    glist_readscalar(glist, natoms, vec, &nextmsg, 0);
+    binbuf_free(b);
+}
+
+/* -------------------- widget behavior for scalar ------------ */
+void scalar_getbasexy(t_scalar *x, float *basex, float *basey)
+{
+    t_template *template = template_findbyname(x->sc_template);
+    *basex = template_getfloat(template, gensym("x"), x->sc_vec, 0);
+    *basey = template_getfloat(template, gensym("y"), x->sc_vec, 0);
+}
+
+static void scalar_getrect(t_gobj *z, t_glist *owner,
+    int *xp1, int *yp1, int *xp2, int *yp2)
+{
+    t_scalar *x = (t_scalar *)z;
+    int hit = 0;
+    t_template *template = template_findbyname(x->sc_template);
+    t_canvas *templatecanvas = template_findcanvas(template);
+    int x1 = 0x7fffffff, x2 = -0x7fffffff, y1 = 0x7fffffff, y2 = -0x7fffffff;
+    t_gobj *y;
+    float basex, basey;
+    scalar_getbasexy(x, &basex, &basey);
+        /* if someone deleted the template canvas, we're just a point */
+    if (!templatecanvas)
+    {
+        x1 = x2 = glist_xtopixels(owner, basex);
+        y1 = y2 = glist_ytopixels(owner, basey);
+    }
+    else
+    {
+        int hit = 0;
+        x1 = y1 = 0x7fffffff;
+        x2 = y2 = -0x7fffffff;
+        for (y = templatecanvas->gl_list; y; y = y->g_next)
+        {
+            t_parentwidgetbehavior *wb = pd_getparentwidget(&y->g_pd);
+            int nx1, ny1, nx2, ny2;
+            if (!wb) continue;
+            (*wb->w_parentgetrectfn)(y, owner,
+                x->sc_vec, template, basex, basey,
+                &nx1, &ny1, &nx2, &ny2);
+            if (hit)
+            {
+                if (nx1 < x1) x1 = nx1;
+                if (ny1 < y1) y1 = ny1;
+                if (nx2 > x2) x2 = nx2;
+                if (ny2 > y2) y2 = ny2;
+            }
+            else x1 = nx1, y1 = ny1, x2 = nx2, y2 = ny2, hit = 1;
+        }
+        if (!hit) x1 = y1 = x2 = y2 = 0;
+    }
+    /* post("scalar x1 %d y1 %d x2 %d y2 %d", x1, y1, x2, y2); */
+    *xp1 = x1;
+    *yp1 = y1;
+    *xp2 = x2;
+    *yp2 = y2; 
+}
+
+static void scalar_select(t_gobj *z, t_glist *owner, int state)
+{
+    t_scalar *x = (t_scalar *)z;
+    /* post("scalar_select %d", state); */
+    /* later */
+    if (state)
+    {
+        int x1, y1, x2, y2;
+        scalar_getrect(z, owner, &x1, &y1, &x2, &y2);
+        x1--; x2++; y1--; y2++;
+        sys_vgui(".x%x.c create line %d %d %d %d %d %d %d %d %d %d \
+            -width 0 -fill blue -tags select%x\n",
+                glist_getcanvas(owner), x1, y1, x1, y2, x2, y2, x2, y1, x1, y1,
+                x);
+    }
+    else sys_vgui(".x%x.c delete select%x\n", glist_getcanvas(owner), x);
+}
+
+static void scalar_displace(t_gobj *z, t_glist *glist, int dx, int dy)
+{
+    t_scalar *x = (t_scalar *)z;
+    t_symbol *templatesym = x->sc_template;
+    t_template *template = template_findbyname(templatesym);
+    t_symbol *zz;
+    int xonset, yonset, xtype, ytype, gotx, goty;
+    if (!template)
+    {
+        error("scalar: couldn't find template %s", templatesym->s_name);
+        return;
+    }
+    gotx = template_find_field(template, gensym("x"), &xonset, &xtype, &zz);
+    if (gotx && (xtype != DT_FLOAT))
+        gotx = 0;
+    goty = template_find_field(template, gensym("y"), &yonset, &ytype, &zz);
+    if (goty && (ytype != DT_FLOAT))
+        goty = 0;
+    if (gotx)
+        *(t_float *)(((char *)(x->sc_vec)) + xonset) +=
+            dx * (glist_pixelstox(glist, 1) - glist_pixelstox(glist, 0));
+    if (goty)
+        *(t_float *)(((char *)(x->sc_vec)) + yonset) +=
+            dy * (glist_pixelstoy(glist, 1) - glist_pixelstoy(glist, 0));
+    glist_redrawitem(glist, z);
+    if (glist_isselected(glist, z))
+    {
+        scalar_select(z, glist, 0);
+        scalar_select(z, glist, 1);
+    }
+}
+
+static void scalar_activate(t_gobj *z, t_glist *owner, int state)
+{
+    /* post("scalar_activate %d", state); */
+    /* later */
+}
+
+static void scalar_delete(t_gobj *z, t_glist *glist)
+{
+    /* nothing to do */
+}
+
+static void scalar_vis(t_gobj *z, t_glist *owner, int vis)
+{
+    t_scalar *x = (t_scalar *)z;
+    t_template *template = template_findbyname(x->sc_template);
+    t_canvas *templatecanvas = template_findcanvas(template);
+    t_gobj *y;
+    float basex, basey;
+    scalar_getbasexy(x, &basex, &basey);
+        /* if we don't know how to draw it, make a small rectangle */
+    if (!templatecanvas)
+    {
+        if (vis)
+        {
+            int x1 = glist_xtopixels(owner, basex);
+            int y1 = glist_ytopixels(owner, basey);
+            sys_vgui(".x%x.c create rectangle %d %d %d %d -tags scalar%x\n",
+                glist_getcanvas(owner), x1-1, y1-1, x1+1, y1+1, x);
+        }
+        else sys_vgui(".x%x.c delete scalar%x\n", glist_getcanvas(owner), x);
+        return;
+    }
+
+    for (y = templatecanvas->gl_list; y; y = y->g_next)
+    {
+        t_parentwidgetbehavior *wb = pd_getparentwidget(&y->g_pd);
+        if (!wb) continue;
+        (*wb->w_parentvisfn)(y, owner, x->sc_vec, template, basex, basey, vis);
+    }
+}
+
+static int scalar_click(t_gobj *z, struct _glist *owner,
+    int xpix, int ypix, int shift, int alt, int dbl, int doit)
+{
+    t_scalar *x = (t_scalar *)z;
+    int hit = 0;
+    t_template *template = template_findbyname(x->sc_template);
+    t_canvas *templatecanvas = template_findcanvas(template);
+    t_gobj *y;
+    float basex, basey;
+    scalar_getbasexy(x, &basex, &basey);
+    for (y = templatecanvas->gl_list; y; y = y->g_next)
+    {
+        t_parentwidgetbehavior *wb = pd_getparentwidget(&y->g_pd);
+        if (!wb) continue;
+        if (hit = (*wb->w_parentclickfn)(y, owner,
+            x, template, basex, basey,
+            xpix, ypix, shift, alt, dbl, doit))
+                return (hit);
+    }
+    return (0);
+}
+
+void canvas_writescalar(t_symbol *templatesym, t_word *w, t_binbuf *b,
+    int amarrayelement);
+
+static void scalar_save(t_gobj *z, t_binbuf *b)
+{
+    t_scalar *x = (t_scalar *)z;
+    t_binbuf *b2 = binbuf_new();
+    t_atom a, *argv;
+    int i, argc;
+    canvas_writescalar(x->sc_template, x->sc_vec, b2, 0);
+    binbuf_addv(b, "ss", &s__X, gensym("scalar"));
+    binbuf_addbinbuf(b, b2);
+    binbuf_addsemi(b);
+    binbuf_free(b2);
+}
+
+static void scalar_properties(t_gobj *z, struct _glist *owner)
+{
+    t_scalar *x = (t_scalar *)z;
+    char *buf, buf2[80];
+    int bufsize;
+    t_binbuf *b;
+    glist_noselect(owner);
+    glist_select(owner, z);
+    b = glist_writetobinbuf(owner, 0);
+    binbuf_gettext(b, &buf, &bufsize);
+    binbuf_free(b);
+    buf = t_resizebytes(buf, bufsize, bufsize+1);
+    buf[bufsize] = 0;
+    sprintf(buf2, "pdtk_data_dialog %%s {");
+    gfxstub_new((t_pd *)owner, x, buf2);
+    sys_gui(buf);
+    sys_gui("}\n");
+    t_freebytes(buf, bufsize+1);
+}
+
+static t_widgetbehavior scalar_widgetbehavior =
+{
+    scalar_getrect,
+    scalar_displace,
+    scalar_select,
+    scalar_activate,
+    scalar_delete,
+    scalar_vis,
+    scalar_click,
+};
+
+static void scalar_free(t_scalar *x)
+{
+    int i;
+    t_dataslot *datatypes, *dt;
+    t_symbol *templatesym = x->sc_template;
+    t_template *template = template_findbyname(templatesym);
+    if (!template)
+    {
+        error("scalar: couldn't find template %s", templatesym->s_name);
+        return;
+    }
+    word_free(x->sc_vec, template);
+    gfxstub_deleteforkey(x);
+        /* the "size" field in the class is zero, so Pd doesn't try to free
+        us automatically (see pd_free()) */
+    freebytes(x, sizeof(t_scalar) + (template->t_n - 1) * sizeof(*x->sc_vec));
+}
+
+/* ----------------- setup function ------------------- */
+
+void g_scalar_setup(void)
+{
+    scalar_class = class_new(gensym("scalar"), 0, (t_method)scalar_free, 0,
+        CLASS_GOBJ, 0);
+    class_setwidget(scalar_class, &scalar_widgetbehavior);
+    class_setsavefn(scalar_class, scalar_save);
+    class_setpropertiesfn(scalar_class, scalar_properties);
+}
+/* Copyright (c) 1997-1999 Miller Puckette.
+* For information on usage and redistribution, and for a DISCLAIMER OF ALL
+* WARRANTIES, see the file, "LICENSE.txt," in this distribution.  */
+
+/* This file defines the "scalar" object, which is not a text object, just a
+"gobj".  Scalars have templates which describe their structures, which
+can contain numbers, sublists, and arrays.
+
+Also, the "tscalar" object, an ordinary text object that owns a single "scalar"
+and draws it on the parent.  This is intended as a way that abstractions can
+control their appearances by adding stuff to draw.
+*/
+
+/* IOhannes :
+ * changed the canvas_restore, so that it might accept $args as well (like "pd $0_test")
+ * so you can make multiple & distinguishable templates
+ * 1511:forum::für::umläute:2001
+ * changes marked with    IOhannes
+ * added Krzysztof Czajas fix to avoid crashing...
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>      /* for read/write to files */
+#include "m_pd.h"
+#include "g_canvas.h"
+
+t_class *scalar_class;
+
+void word_init(t_word *wp, t_template *template, t_gpointer *gp)
+{
+    int i, nitems = template->t_n;
+    t_dataslot *datatypes = template->t_vec;
+    for (i = 0; i < nitems; i++, datatypes++, wp++)
+    {
+        int type = datatypes->ds_type;
+        if (type == DT_FLOAT)
+            wp->w_float = 0; 
+        else if (type == DT_SYMBOL)
+            wp->w_symbol = &s_symbol;
+        else if (type == DT_ARRAY)
+        {
+            wp->w_array = array_new(datatypes->ds_arraytemplate, gp);
+        }
+        else if (type == DT_LIST)
+        {
+                /* LATER test this and get it to work */
+            wp->w_list = canvas_new(0, 0, 0, 0);
+        }
+    }
+}
+
+void word_restore(t_word *wp, t_template *template,
+    int argc, t_atom *argv)
+{
+    int i, nitems = template->t_n;
+    t_dataslot *datatypes = template->t_vec;
+    for (i = 0; i < nitems; i++, datatypes++, wp++)
+    {
+        int type = datatypes->ds_type;
+        if (type == DT_FLOAT)
+        {
+            float f;
+            if (argc)
+            {
+                f =  atom_getfloat(argv);
+                argv++, argc--;
+            }
+            else f = 0;
+            wp->w_float = f; 
+        }
+        else if (type == DT_SYMBOL)
+        {
+            t_symbol *s;
+            if (argc)
+            {
+                s =  atom_getsymbol(argv);
+                argv++, argc--;
+            }
+            else s = &s_;
+            wp->w_symbol = s;
+        }
+    }
+    if (argc)
+        post("warning: word_restore: extra arguments");
+}
+
+void word_free(t_word *wp, t_template *template)
+{
+    int i;
+    t_dataslot *dt;
+    for (dt = template->t_vec, i = 0; i < template->t_n; i++, dt++)
+    {
+        if (dt->ds_type == DT_ARRAY)
+            array_free(wp[i].w_array);
+        else if (dt->ds_type == DT_LIST)
+            canvas_free(wp[i].w_list);
+    }
+}
+
+    /* make a new scalar and add to the glist.  We create a "gp" here which
+    will be used for array items to point back here.  This gp doesn't do
+    reference counting or "validation" updates though; the parent won't go away
+    without the contained arrays going away too.  The "gp" is copied out
+    by value in the word_init() routine so we can throw our copy away. */
+
+t_scalar *scalar_new(t_glist *owner, t_symbol *templatesym)
+{
+    t_scalar *x;
+    t_template *template;
+    t_gpointer gp;
+    gpointer_init(&gp);
+    template = template_findbyname(templatesym);
+    if (!template)
+    {
+        error("scalar: couldn't find template %s", templatesym->s_name);
+        return (0);
+    }
+    x = (t_scalar *)getbytes(sizeof(t_scalar) +
+        (template->t_n - 1) * sizeof(*x->sc_vec));
+    x->sc_gobj.g_pd = scalar_class;
+    x->sc_template = templatesym;
+    gpointer_setglist(&gp, owner, x);
+    word_init(x->sc_vec, template, &gp);
+    return (x);
+}
+
+    /* Pd method to create a new scalar, add it to a glist, and initialize
+    it from the message arguments. */
+
+int glist_readscalar(t_glist *x, int natoms, t_atom *vec,
+    int *p_nextmsg, int selectit);
+
+void glist_scalar(t_glist *glist,
+    t_symbol *classname, t_int argc, t_atom *argv)
+{
+    t_symbol *templatesym =
+        canvas_makebindsym(atom_getsymbolarg(0, argc, argv));
+    t_binbuf *b;
+    int natoms, nextmsg = 0;
+    t_atom *vec;
+    if (!template_findbyname(templatesym))
+    {
+        pd_error(glist, "%s: no such template",
+            atom_getsymbolarg(0, argc, argv)->s_name);
+        return;
+    }
+
+    b = binbuf_new();
+    binbuf_restore(b, argc, argv);
+    natoms = binbuf_getnatom(b);
+    vec = binbuf_getvec(b);
+    
+    glist_readscalar(glist, natoms, vec, &nextmsg, 0);
+    binbuf_free(b);
+}
+
+/* -------------------- widget behavior for scalar ------------ */
+void scalar_getbasexy(t_scalar *x, float *basex, float *basey)
+{
+    t_template *template = template_findbyname(x->sc_template);
+    *basex = template_getfloat(template, gensym("x"), x->sc_vec, 0);
+    *basey = template_getfloat(template, gensym("y"), x->sc_vec, 0);
+}
+
+static void scalar_getrect(t_gobj *z, t_glist *owner,
+    int *xp1, int *yp1, int *xp2, int *yp2)
+{
+    t_scalar *x = (t_scalar *)z;
+    int hit = 0;
+    t_template *template = template_findbyname(x->sc_template);
+    t_canvas *templatecanvas = template_findcanvas(template);
+    int x1 = 0x7fffffff, x2 = -0x7fffffff, y1 = 0x7fffffff, y2 = -0x7fffffff;
+    t_gobj *y;
+    float basex, basey;
+    scalar_getbasexy(x, &basex, &basey);
+        /* if someone deleted the template canvas, we're just a point */
+    if (!templatecanvas)
+    {
+        x1 = x2 = glist_xtopixels(owner, basex);
+        y1 = y2 = glist_ytopixels(owner, basey);
+    }
+    else
+    {
+        int hit = 0;
+        x1 = y1 = 0x7fffffff;
+        x2 = y2 = -0x7fffffff;
+        for (y = templatecanvas->gl_list; y; y = y->g_next)
+        {
+            t_parentwidgetbehavior *wb = pd_getparentwidget(&y->g_pd);
+            int nx1, ny1, nx2, ny2;
+            if (!wb) continue;
+            (*wb->w_parentgetrectfn)(y, owner,
+                x->sc_vec, template, basex, basey,
+                &nx1, &ny1, &nx2, &ny2);
+            if (hit)
+            {
+                if (nx1 < x1) x1 = nx1;
+                if (ny1 < y1) y1 = ny1;
+                if (nx2 > x2) x2 = nx2;
+                if (ny2 > y2) y2 = ny2;
+            }
+            else x1 = nx1, y1 = ny1, x2 = nx2, y2 = ny2, hit = 1;
+        }
+        if (!hit) x1 = y1 = x2 = y2 = 0;
+    }
+    /* post("scalar x1 %d y1 %d x2 %d y2 %d", x1, y1, x2, y2); */
+    *xp1 = x1;
+    *yp1 = y1;
+    *xp2 = x2;
+    *yp2 = y2; 
+}
+
+static void scalar_select(t_gobj *z, t_glist *owner, int state)
+{
+    t_scalar *x = (t_scalar *)z;
+    /* post("scalar_select %d", state); */
+    /* later */
+    if (state)
+    {
+        int x1, y1, x2, y2;
+        scalar_getrect(z, owner, &x1, &y1, &x2, &y2);
+        x1--; x2++; y1--; y2++;
+        sys_vgui(".x%x.c create line %d %d %d %d %d %d %d %d %d %d \
+            -width 0 -fill blue -tags select%x\n",
+                glist_getcanvas(owner), x1, y1, x1, y2, x2, y2, x2, y1, x1, y1,
+                x);
+    }
+    else sys_vgui(".x%x.c delete select%x\n", glist_getcanvas(owner), x);
+}
+
+static void scalar_displace(t_gobj *z, t_glist *glist, int dx, int dy)
+{
+    t_scalar *x = (t_scalar *)z;
+    t_symbol *templatesym = x->sc_template;
+    t_template *template = template_findbyname(templatesym);
+    t_symbol *zz;
+    int xonset, yonset, xtype, ytype, gotx, goty;
+    if (!template)
+    {
+        error("scalar: couldn't find template %s", templatesym->s_name);
+        return;
+    }
+    gotx = template_find_field(template, gensym("x"), &xonset, &xtype, &zz);
+    if (gotx && (xtype != DT_FLOAT))
+        gotx = 0;
+    goty = template_find_field(template, gensym("y"), &yonset, &ytype, &zz);
+    if (goty && (ytype != DT_FLOAT))
+        goty = 0;
+    if (gotx)
+        *(t_float *)(((char *)(x->sc_vec)) + xonset) +=
+            dx * (glist_pixelstox(glist, 1) - glist_pixelstox(glist, 0));
+    if (goty)
+        *(t_float *)(((char *)(x->sc_vec)) + yonset) +=
+            dy * (glist_pixelstoy(glist, 1) - glist_pixelstoy(glist, 0));
+    glist_redrawitem(glist, z);
+    if (glist_isselected(glist, z))
+    {
+        scalar_select(z, glist, 0);
+        scalar_select(z, glist, 1);
+    }
+}
+
+static void scalar_activate(t_gobj *z, t_glist *owner, int state)
+{
+    /* post("scalar_activate %d", state); */
+    /* later */
+}
+
+static void scalar_delete(t_gobj *z, t_glist *glist)
+{
+    /* nothing to do */
+}
+
+static void scalar_vis(t_gobj *z, t_glist *owner, int vis)
+{
+    t_scalar *x = (t_scalar *)z;
+    t_template *template = template_findbyname(x->sc_template);
+    t_canvas *templatecanvas = template_findcanvas(template);
+    t_gobj *y;
+    float basex, basey;
+    scalar_getbasexy(x, &basex, &basey);
+        /* if we don't know how to draw it, make a small rectangle */
+    if (!templatecanvas)
+    {
+        if (vis)
+        {
+            int x1 = glist_xtopixels(owner, basex);
+            int y1 = glist_ytopixels(owner, basey);
+            sys_vgui(".x%x.c create rectangle %d %d %d %d -tags scalar%x\n",
+                glist_getcanvas(owner), x1-1, y1-1, x1+1, y1+1, x);
+        }
+        else sys_vgui(".x%x.c delete scalar%x\n", glist_getcanvas(owner), x);
+        return;
+    }
+
+    for (y = templatecanvas->gl_list; y; y = y->g_next)
+    {
+        t_parentwidgetbehavior *wb = pd_getparentwidget(&y->g_pd);
+        if (!wb) continue;
+        (*wb->w_parentvisfn)(y, owner, x->sc_vec, template, basex, basey, vis);
+    }
+}
+
+static int scalar_click(t_gobj *z, struct _glist *owner,
+    int xpix, int ypix, int shift, int alt, int dbl, int doit)
+{
+    t_scalar *x = (t_scalar *)z;
+    int hit = 0;
+    t_template *template = template_findbyname(x->sc_template);
+    t_canvas *templatecanvas = template_findcanvas(template);
+    t_gobj *y;
+    float basex, basey;
+    scalar_getbasexy(x, &basex, &basey);
+    for (y = templatecanvas->gl_list; y; y = y->g_next)
+    {
+        t_parentwidgetbehavior *wb = pd_getparentwidget(&y->g_pd);
+        if (!wb) continue;
+        if (hit = (*wb->w_parentclickfn)(y, owner,
+            x, template, basex, basey,
+            xpix, ypix, shift, alt, dbl, doit))
+                return (hit);
+    }
+    return (0);
+}
+
+void canvas_writescalar(t_symbol *templatesym, t_word *w, t_binbuf *b,
+    int amarrayelement);
+
+static void scalar_save(t_gobj *z, t_binbuf *b)
+{
+    t_scalar *x = (t_scalar *)z;
+    t_binbuf *b2 = binbuf_new();
+    t_atom a, *argv;
+    int i, argc;
+    canvas_writescalar(x->sc_template, x->sc_vec, b2, 0);
+    binbuf_addv(b, "ss", &s__X, gensym("scalar"));
+    binbuf_addbinbuf(b, b2);
+    binbuf_addsemi(b);
+    binbuf_free(b2);
+}
+
+static void scalar_properties(t_gobj *z, struct _glist *owner)
+{
+    t_scalar *x = (t_scalar *)z;
+    char *buf, buf2[80];
+    int bufsize;
+    t_binbuf *b;
+    glist_noselect(owner);
+    glist_select(owner, z);
+    b = glist_writetobinbuf(owner, 0);
+    binbuf_gettext(b, &buf, &bufsize);
+    binbuf_free(b);
+    buf = t_resizebytes(buf, bufsize, bufsize+1);
+    buf[bufsize] = 0;
+    sprintf(buf2, "pdtk_data_dialog %%s {");
+    gfxstub_new((t_pd *)owner, x, buf2);
+    sys_gui(buf);
+    sys_gui("}\n");
+    t_freebytes(buf, bufsize+1);
+}
+
+static t_widgetbehavior scalar_widgetbehavior =
+{
+    scalar_getrect,
+    scalar_displace,
+    scalar_select,
+    scalar_activate,
+    scalar_delete,
+    scalar_vis,
+    scalar_click,
+};
+
+static void scalar_free(t_scalar *x)
+{
+    int i;
+    t_dataslot *datatypes, *dt;
+    t_symbol *templatesym = x->sc_template;
+    t_template *template = template_findbyname(templatesym);
+    if (!template)
+    {
+        error("scalar: couldn't find template %s", templatesym->s_name);
+        return;
+    }
+    word_free(x->sc_vec, template);
+    gfxstub_deleteforkey(x);
+        /* the "size" field in the class is zero, so Pd doesn't try to free
+        us automatically (see pd_free()) */
+    freebytes(x, sizeof(t_scalar) + (template->t_n - 1) * sizeof(*x->sc_vec));
+}
+
+/* ----------------- setup function ------------------- */
+
+void g_scalar_setup(void)
+{
+    scalar_class = class_new(gensym("scalar"), 0, (t_method)scalar_free, 0,
+        CLASS_GOBJ, 0);
+    class_setwidget(scalar_class, &scalar_widgetbehavior);
+    class_setsavefn(scalar_class, scalar_save);
+    class_setpropertiesfn(scalar_class, scalar_properties);
+}