g_mycanvas.c 26.8 KB
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/* 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. */

/* g_7_guis.c written by Thomas Musil (c) IEM KUG Graz Austria 2000-2001 */
/* thanks to Miller Puckette, Guenther Geiger and Krzystof Czaja */

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#include "config.h"
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#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <ctype.h>
#include "m_pd.h"
#include "g_canvas.h"
#include "t_tk.h"
#include "g_all_guis.h"
#include <math.h>

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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
#endif

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#ifdef HAVE_IO_H
#include <io.h>
#endif

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extern int gfxstub_haveproperties(void *key);
void my_canvas_draw_select(t_my_canvas* x, t_glist* glist);

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/* ---------- cnv  my gui-canvas for a window ---------------- */

t_widgetbehavior my_canvas_widgetbehavior;
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static t_class *my_canvas_class;
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/* widget helper functions */

void my_canvas_draw_new(t_my_canvas *x, t_glist *glist)
{
    int xpos=text_xpix(&x->x_gui.x_obj, glist);
    int ypos=text_ypix(&x->x_gui.x_obj, glist);
    t_canvas *canvas=glist_getcanvas(glist);

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    t_scalehandle *sh = (t_scalehandle *)x->x_gui.x_handle;
    sprintf(sh->h_pathname, ".x%lx.h%lx", (t_int)canvas, (t_int)sh);

    t_scalehandle *lh = (t_scalehandle *)x->x_gui.x_lhandle;
    sprintf(lh->h_pathname, ".x%lx.h%lx", (t_int)canvas, (t_int)lh);

    //if (glist_isvisible(glist) {
        char *nlet_tag = iem_get_tag(glist, (t_iemgui *)x);

        sys_vgui(".x%lx.c create prect %d %d %d %d -fill #%6.6x -stroke #%6.6x "
                 "-tags {%lxRECT %lxMYCNV %s text iemgui}\n",
                 canvas, xpos, ypos,
                 xpos + x->x_vis_w, ypos + x->x_vis_h,
                 x->x_gui.x_bcol, x->x_gui.x_bcol, x, x, nlet_tag);
        sys_vgui(".x%lx.c create prect %d %d %d %d -stroke #%6.6x "
                 "-tags {%lxBASE %lxMYCNV %s text iemgui}\n",
                 canvas, xpos, ypos,
                 xpos + x->x_gui.x_w, ypos + x->x_gui.x_h,
                 x->x_gui.x_bcol, x, x, nlet_tag);
        sys_vgui(".x%lx.c create text %d %d -text {%s} -anchor w "
                 "-font {{%s} -%d %s} -fill #%6.6x "
                 "-tags {%lxLABEL %lxMYCNV %s text iemgui}\n",
                 canvas, xpos+x->x_gui.x_ldx, ypos+x->x_gui.x_ldy,
                 strcmp(x->x_gui.x_lab->s_name, "empty")?x->x_gui.x_lab->s_name:"",
                 x->x_gui.x_font, x->x_gui.x_fontsize, sys_fontweight,
                 x->x_gui.x_lcol, x, x, nlet_tag);
    //}
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}

void my_canvas_draw_move(t_my_canvas *x, t_glist *glist)
{
    int xpos=text_xpix(&x->x_gui.x_obj, glist);
    int ypos=text_ypix(&x->x_gui.x_obj, glist);
    t_canvas *canvas=glist_getcanvas(glist);

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    if (glist_isvisible(canvas))
    {

        sys_vgui(".x%lx.c coords %lxRECT %d %d %d %d\n",
                 canvas, x, xpos, ypos, xpos + x->x_vis_w,
                 ypos + x->x_vis_h);
        sys_vgui(".x%lx.c coords %lxBASE %d %d %d %d\n",
                 canvas, x, xpos, ypos,
                 xpos + x->x_gui.x_w, ypos + x->x_gui.x_h);
        sys_vgui(".x%lx.c coords %lxLABEL %d %d\n",
                 canvas, x, xpos+x->x_gui.x_ldx,
                 ypos+x->x_gui.x_ldy);
        /* redraw scale handle rectangle if selected */
        if (x->x_gui.x_fsf.x_selected)
        {
            my_canvas_draw_select(x, x->x_gui.x_glist);
        }
    }
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}

void my_canvas_draw_erase(t_my_canvas* x, t_glist* glist)
{
    t_canvas *canvas=glist_getcanvas(glist);

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    sys_vgui(".x%lx.c delete %lxMYCNV\n", canvas, x);
    sys_vgui(".x%lx.c dtag all %lxMYCNV\n", canvas, x);
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    scalehandle_draw_erase2(&x->x_gui,glist);
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}

void my_canvas_draw_config(t_my_canvas* x, t_glist* glist)
{
    t_canvas *canvas=glist_getcanvas(glist);

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    /*
    char color[64];
    if (x->x_gui.x_fsf.x_selected)
        sprintf(color, "$pd_colors(selection)");
    else
        sprintf(color, "#%6.6x", x->x_gui.x_bcol);
    */

    sys_vgui(".x%lx.c itemconfigure %lxRECT -fill #%6.6x -stroke #%6.6x\n",
             canvas, x, x->x_gui.x_bcol, x->x_gui.x_bcol);
    if (x->x_gui.x_fsf.x_selected && x->x_gui.x_glist == canvas)
        sys_vgui(".x%lx.c itemconfigure %lxBASE "
                 "-stroke $pd_colors(selection)\n",
                 canvas, x);
    else
        sys_vgui(".x%lx.c itemconfigure %lxBASE -stroke #%6.6x\n", canvas, x,
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             x->x_gui.x_bcol);
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    sys_vgui(".x%lx.c itemconfigure %lxLABEL -font {{%s} -%d %s} "
             "-fill #%6.6x -text {%s} \n",
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             canvas, x, x->x_gui.x_font, x->x_gui.x_fontsize, sys_fontweight,
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             x->x_gui.x_lcol,
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             strcmp(x->x_gui.x_lab->s_name, "empty")?x->x_gui.x_lab->s_name:"");
}

void my_canvas_draw_select(t_my_canvas* x, t_glist* glist)
{
    t_canvas *canvas=glist_getcanvas(glist);
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    t_scalehandle *sh = (t_scalehandle *)(x->x_gui.x_handle);
    t_scalehandle *lh = (t_scalehandle *)(x->x_gui.x_lhandle);

    //if (glist_isvisible(canvas)) {

        if(x->x_gui.x_fsf.x_selected)
        {
            // check if we are drawing inside a gop abstraction
            // visible on parent canvas
            // if so, disable highlighting
            if (x->x_gui.x_glist == glist_getcanvas(glist))
            {

                char *nlet_tag = iem_get_tag(glist, (t_iemgui *)x);

                sys_vgui(".x%lx.c itemconfigure %lxBASE "
                         "-stroke $pd_colors(selection)\n", canvas, x);

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                scalehandle_draw_select(sh,canvas,x->x_vis_w-1,x->x_vis_h-1,nlet_tag,"MYCNV");
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                if (strcmp(x->x_gui.x_lab->s_name, "empty") != 0)
                {
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                    scalehandle_draw_select(lh,canvas,x->x_gui.x_ldx,x->x_gui.x_ldy,nlet_tag,"MYCNV");
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                }
            }

            sys_vgui(".x%lx.c addtag selected withtag %lxMYCNV\n", canvas, x);
        }
        else
        {
            sys_vgui(".x%lx.c itemconfigure %lxBASE -stroke #%6.6x\n",
                canvas, x, x->x_gui.x_bcol);
            sys_vgui(".x%lx.c dtag %lxMYCNV selected\n", canvas, x);
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            scalehandle_draw_erase2(&x->x_gui,glist);
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        }
    //}
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}

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static void my_canvas__clickhook(t_scalehandle *sh, t_floatarg f,
    t_floatarg xxx, t_floatarg yyy)
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{

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    t_my_canvas *x = (t_my_canvas *)(sh->h_master);
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    if (xxx)
    {
        x->x_gui.scale_offset_x = xxx;
        x->x_gui.label_offset_x = xxx;
    }
    if (yyy)
    {
        x->x_gui.scale_offset_y = yyy;
        x->x_gui.label_offset_y = yyy;
    }
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    int newstate = (int)f;
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    if (sh->h_dragon && newstate == 0 && sh->h_scale)
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    {
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        /* done dragging */

        /* first set up the undo apply */
        canvas_apply_setundo(x->x_gui.x_glist, (t_gobj *)x);

        if (sh->h_dragx || sh->h_dragy)
        {

            x->x_vis_w = x->x_vis_w + sh->h_dragx - x->x_gui.scale_offset_x;
            if (x->x_vis_w < SCALE_CNV_MINWIDTH)
                x->x_vis_w = SCALE_CNV_MINWIDTH;
            x->x_vis_h = x->x_vis_h + sh->h_dragy - x->x_gui.scale_offset_y;
            if (x->x_vis_h < SCALE_CNV_MINHEIGHT)
                x->x_vis_h = SCALE_CNV_MINHEIGHT;

            if (x->x_gui.x_w > x->x_vis_w || x->x_gui.x_h > x->x_vis_h)
            {
                x->x_gui.x_w = (x->x_vis_w > x->x_vis_h ? x->x_vis_h : x->x_vis_w);
                x->x_gui.x_h = x->x_gui.x_w;
            }
            canvas_dirty(x->x_gui.x_glist, 1);
        }

        int properties = gfxstub_haveproperties((void *)x);

        if (properties)
        {
            sys_vgui(".gfxstub%lx.rng.min_ent delete 0 end\n", properties);
            sys_vgui(".gfxstub%lx.rng.min_ent insert 0 %d\n", properties, x->x_vis_w);
            sys_vgui(".gfxstub%lx.rng.max_ent delete 0 end\n", properties);
            sys_vgui(".gfxstub%lx.rng.max_ent insert 0 %d\n", properties, x->x_vis_h);
            sys_vgui(".gfxstub%lx.dim.w_ent delete 0 end\n", properties);
            sys_vgui(".gfxstub%lx.dim.w_ent insert 0 %d\n", properties, x->x_gui.x_w);
        }

        if (glist_isvisible(x->x_gui.x_glist))
        {
            sys_vgui(".x%x.c delete %s\n", x->x_gui.x_glist, sh->h_outlinetag);
            my_canvas_draw_move(x, x->x_gui.x_glist);
            iemgui_select((t_gobj *)x, x->x_gui.x_glist, 1);
            canvas_fixlinesfor(x->x_gui.x_glist, (t_text *)x);
            sys_vgui("pdtk_canvas_getscroll .x%lx.c\n", x->x_gui.x_glist);
        }
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    }
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    else if (!sh->h_dragon && newstate && sh->h_scale)
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    {
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        /* dragging */
        if (glist_isvisible(x->x_gui.x_glist))
        {
            sys_vgui("lower %s\n", sh->h_pathname);
            sys_vgui(".x%x.c create prect %d %d %d %d "
                     "-stroke $pd_colors(selection) -strokewidth 1 -tags %s\n",
                x->x_gui.x_glist, x->x_gui.x_obj.te_xpix,
                x->x_gui.x_obj.te_ypix,
                x->x_gui.x_obj.te_xpix + x->x_vis_w,
                x->x_gui.x_obj.te_ypix + x->x_vis_h, sh->h_outlinetag);
        }

        sh->h_dragx = 0;
        sh->h_dragy = 0;
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    }
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    else if (sh->h_dragon && newstate == 0 && !sh->h_scale)
    {
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        /* done dragging */

        /* first set up the undo apply */
        canvas_apply_setundo(x->x_gui.x_glist, (t_gobj *)x);

        if (sh->h_dragx || sh->h_dragy)
        {

            x->x_gui.x_ldx = x->x_gui.x_ldx + sh->h_dragx -
                x->x_gui.label_offset_x;
            x->x_gui.x_ldy = x->x_gui.x_ldy + sh->h_dragy -
                x->x_gui.label_offset_y;

            canvas_dirty(x->x_gui.x_glist, 1);
        }

        int properties = gfxstub_haveproperties((void *)x);

        if (properties)
        {
            sys_vgui(".gfxstub%lx.label.xy.x_entry delete 0 end\n", properties);
            sys_vgui(".gfxstub%lx.label.xy.x_entry insert 0 %d\n", properties,
                x->x_gui.x_ldx);
            sys_vgui(".gfxstub%lx.label.xy.y_entry delete 0 end\n", properties);
            sys_vgui(".gfxstub%lx.label.xy.y_entry insert 0 %d\n", properties,
                x->x_gui.x_ldy);
        }

        if (glist_isvisible(x->x_gui.x_glist))
        {
            my_canvas_draw_move(x, x->x_gui.x_glist);
            iemgui_select((t_gobj *)x, x->x_gui.x_glist, 1);
            canvas_fixlinesfor(x->x_gui.x_glist, (t_text *)x);
            sys_vgui("pdtk_canvas_getscroll .x%lx.c\n", x->x_gui.x_glist);
        }
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    }
    else if (!sh->h_dragon && newstate && !sh->h_scale)
    {
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        /* dragging */
        if (glist_isvisible(x->x_gui.x_glist))
        {
            sys_vgui("lower %s\n", sh->h_pathname);
            t_scalehandle *othersh = (t_scalehandle *)x->x_gui.x_handle;
            sys_vgui("lower .x%lx.h%lx\n",
                (t_int)glist_getcanvas(x->x_gui.x_glist), (t_int)othersh);
        }

        sh->h_dragx = 0;
        sh->h_dragy = 0;
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    }
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    sh->h_dragon = newstate;
}

static void my_canvas__motionhook(t_scalehandle *sh,
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                    t_floatarg f1, t_floatarg f2)
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{
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    if (sh->h_dragon && sh->h_scale)
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    {
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        t_my_canvas *x = (t_my_canvas *)(sh->h_master);
        int dx = (int)f1, dy = (int)f2;
        int newx, newy;
        newx = x->x_gui.x_obj.te_xpix + x->x_vis_w -
            x->x_gui.scale_offset_x + dx;
        newy = x->x_gui.x_obj.te_ypix + x->x_vis_h -
            x->x_gui.scale_offset_y + dy;

        if (newx < x->x_gui.x_obj.te_xpix + SCALE_CNV_MINWIDTH)
            newx = x->x_gui.x_obj.te_xpix + SCALE_CNV_MINWIDTH;
        if (newy < x->x_gui.x_obj.te_ypix + SCALE_CNV_MINHEIGHT)
            newy = x->x_gui.x_obj.te_ypix + SCALE_CNV_MINHEIGHT;

        if (glist_isvisible(x->x_gui.x_glist))
        {
            sys_vgui(".x%x.c coords %s %d %d %d %d\n",
                 x->x_gui.x_glist, sh->h_outlinetag, x->x_gui.x_obj.te_xpix,
                 x->x_gui.x_obj.te_ypix, newx, newy);
        }
        sh->h_dragx = dx;
        sh->h_dragy = dy;

        int properties = gfxstub_haveproperties((void *)x);

        if (properties)
        {
            int new_w = x->x_vis_w - x->x_gui.scale_offset_x + sh->h_dragx;
            int new_h = x->x_vis_h - x->x_gui.scale_offset_y + sh->h_dragy;
            sys_vgui(".gfxstub%lx.rng.min_ent delete 0 end\n", properties);
            sys_vgui(".gfxstub%lx.rng.min_ent insert 0 %d\n", properties, new_w);
            sys_vgui(".gfxstub%lx.rng.max_ent delete 0 end\n", properties);
            sys_vgui(".gfxstub%lx.rng.max_ent insert 0 %d\n", properties, new_h);
            int min = (new_w < new_h ? new_w : new_h);
            if (min <= x->x_gui.x_w)
            {
                sys_vgui(".gfxstub%lx.dim.w_ent delete 0 end\n", properties);
                sys_vgui(".gfxstub%lx.dim.w_ent insert 0 %d\n", properties, min);
            }
        }
    }
    else if (sh->h_dragon && !sh->h_scale)
    {
        t_my_canvas *x = (t_my_canvas *)(sh->h_master);
        int dx = (int)f1, dy = (int)f2;
        sh->h_dragx = dx;
        sh->h_dragy = dy;

        int properties = gfxstub_haveproperties((void *)x);

        if (properties)
        {
            int new_x = x->x_gui.x_ldx - x->x_gui.label_offset_x + sh->h_dragx;
            int new_y = x->x_gui.x_ldy - x->x_gui.label_offset_y + sh->h_dragy;
            sys_vgui(".gfxstub%lx.label.xy.x_entry delete 0 end\n", properties);
            sys_vgui(".gfxstub%lx.label.xy.x_entry insert 0 %d\n", properties, new_x);
            sys_vgui(".gfxstub%lx.label.xy.y_entry delete 0 end\n", properties);
            sys_vgui(".gfxstub%lx.label.xy.y_entry insert 0 %d\n", properties, new_y);
        }

        if (glist_isvisible(x->x_gui.x_glist))
        {
            int xpos=text_xpix(&x->x_gui.x_obj, x->x_gui.x_glist);
            int ypos=text_ypix(&x->x_gui.x_obj, x->x_gui.x_glist);
            t_canvas *canvas=glist_getcanvas(x->x_gui.x_glist);
            sys_vgui(".x%lx.c coords %lxLABEL %d %d\n",
                canvas, x,
                xpos+x->x_gui.x_ldx + sh->h_dragx - x->x_gui.label_offset_x,
                ypos+x->x_gui.x_ldy + sh->h_dragy - x->x_gui.label_offset_y);
        }
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    }
}

void my_canvas_draw(t_my_canvas *x, t_glist *glist, int mode)
{
    if(mode == IEM_GUI_DRAW_MODE_MOVE)
        my_canvas_draw_move(x, glist);
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    else if(mode == IEM_GUI_DRAW_MODE_NEW)
    {
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        my_canvas_draw_new(x, glist);
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        sys_vgui(".x%lx.c raise all_cords\n", glist_getcanvas(glist));
    }
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    else if(mode == IEM_GUI_DRAW_MODE_SELECT)
        my_canvas_draw_select(x, glist);
    else if(mode == IEM_GUI_DRAW_MODE_ERASE)
        my_canvas_draw_erase(x, glist);
    else if(mode == IEM_GUI_DRAW_MODE_CONFIG)
        my_canvas_draw_config(x, glist);
}

/* ------------------------ cnv widgetbehaviour----------------------------- */

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static void my_canvas_getrect(t_gobj *z, t_glist *glist,
    int *xp1, int *yp1, int *xp2, int *yp2)
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{
    t_my_canvas *x = (t_my_canvas *)z;
    
    *xp1 = text_xpix(&x->x_gui.x_obj, glist);
    *yp1 = text_ypix(&x->x_gui.x_obj, glist);
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    if (!glist_istoplevel(glist))
    {
        //if we are trying to calculate visibility of a widget inside a GOP
        *xp2 = *xp1 + x->x_vis_w;
        *yp2 = *yp1 + x->x_vis_h;
    }
    else
    {
        *xp2 = *xp1 + x->x_gui.x_w;
        *yp2 = *yp1 + x->x_gui.x_h;
    }
    iemgui_label_getrect(x->x_gui, glist, xp1, yp1, xp2, yp2);
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}

static void my_canvas_save(t_gobj *z, t_binbuf *b)
{
    t_my_canvas *x = (t_my_canvas *)z;
    int bflcol[3];
    t_symbol *srl[3];

    iemgui_save(&x->x_gui, srl, bflcol);
    binbuf_addv(b, "ssiisiiisssiiiiiii", gensym("#X"),gensym("obj"),
                (int)x->x_gui.x_obj.te_xpix, (int)x->x_gui.x_obj.te_ypix,
                gensym("cnv"), x->x_gui.x_w, x->x_vis_w, x->x_vis_h,
                srl[0], srl[1], srl[2], x->x_gui.x_ldx, x->x_gui.x_ldy,
                iem_fstyletoint(&x->x_gui.x_fsf), x->x_gui.x_fontsize,
                bflcol[0], bflcol[2], iem_symargstoint(&x->x_gui.x_isa));
    binbuf_addv(b, ";");
}

static void my_canvas_properties(t_gobj *z, t_glist *owner)
{
    t_my_canvas *x = (t_my_canvas *)z;
    char buf[800];
    t_symbol *srl[3];

    iemgui_properties(&x->x_gui, srl);
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    sprintf(buf, "pdtk_iemgui_dialog %%s |cnv| \
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            ------selectable_dimensions(pix):------ %d %d size: 0.0 0.0 empty \
            ------visible_rectangle(pix)(pix):------ %d width: %d height: %d \
            %d empty empty %d %d empty %d \
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            {%s} {%s} \
            {%s} %d %d \
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            %d %d \
            %d %d %d\n",
            x->x_gui.x_w, 1,
            x->x_vis_w, x->x_vis_h, 0,/*no_schedule*/
            -1, -1, -1, -1,/*no linlog, no init, no multi*/
            srl[0]->s_name, srl[1]->s_name,
            srl[2]->s_name, x->x_gui.x_ldx, x->x_gui.x_ldy,
            x->x_gui.x_fsf.x_font_style, x->x_gui.x_fontsize,
            0xffffff & x->x_gui.x_bcol, -1/*no frontcolor*/, 0xffffff & x->x_gui.x_lcol);
    gfxstub_new(&x->x_gui.x_obj.ob_pd, x, buf);
}

static void my_canvas_get_pos(t_my_canvas *x)
{
    if(x->x_gui.x_fsf.x_snd_able && x->x_gui.x_snd->s_thing)
    {
        x->x_at[0].a_w.w_float = text_xpix(&x->x_gui.x_obj, x->x_gui.x_glist);
        x->x_at[1].a_w.w_float = text_ypix(&x->x_gui.x_obj, x->x_gui.x_glist);
        pd_list(x->x_gui.x_snd->s_thing, &s_list, 2, x->x_at);
    }
}

static void my_canvas_dialog(t_my_canvas *x, t_symbol *s, int argc, t_atom *argv)
{
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    canvas_apply_setundo(x->x_gui.x_glist, (t_gobj *)x);
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    t_symbol *srl[3];
    int a = (int)atom_getintarg(0, argc, argv);
    int w = (int)atom_getintarg(2, argc, argv);
    int h = (int)atom_getintarg(3, argc, argv);
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    iemgui_dialog(&x->x_gui, srl, argc, argv);
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    x->x_gui.x_isa.x_loadinit = 0;
    if(a < 1)
        a = 1;
    x->x_gui.x_w = a;
    x->x_gui.x_h = x->x_gui.x_w;
    if(w < 1)
        w = 1;
    x->x_vis_w = w;
    if(h < 1)
        h = 1;
    x->x_vis_h = h;
    (*x->x_gui.x_draw)(x, x->x_gui.x_glist, IEM_GUI_DRAW_MODE_CONFIG);
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    //(*x->x_gui.x_draw)(x, x->x_gui.x_glist, IEM_GUI_DRAW_MODE_MOVE);
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    iemgui_shouldvis((void *)x, &x->x_gui, IEM_GUI_DRAW_MODE_MOVE);
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    /* forcing redraw of the scale handle */
    if (x->x_gui.x_fsf.x_selected)
    {
        my_canvas_draw_select(x, x->x_gui.x_glist);
    }
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    //ico@bukvic.net 100518 update scrollbars when object
    //potentially exceeds window size
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    t_canvas *canvas=(t_canvas *)glist_getcanvas(x->x_gui.x_glist);
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    sys_vgui("pdtk_canvas_getscroll .x%lx.c\n", (long unsigned int)canvas);
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}

static void my_canvas_size(t_my_canvas *x, t_symbol *s, int ac, t_atom *av)
{
    int i = (int)atom_getintarg(0, ac, av);

    if(i < 1)
        i = 1;
    x->x_gui.x_w = i;
    x->x_gui.x_h = i;
    iemgui_size((void *)x, &x->x_gui);
}

static void my_canvas_delta(t_my_canvas *x, t_symbol *s, int ac, t_atom *av)
{iemgui_delta((void *)x, &x->x_gui, s, ac, av);}

static void my_canvas_pos(t_my_canvas *x, t_symbol *s, int ac, t_atom *av)
{iemgui_pos((void *)x, &x->x_gui, s, ac, av);}

static void my_canvas_vis_size(t_my_canvas *x, t_symbol *s, int ac, t_atom *av)
{
    int i;

    i = (int)atom_getintarg(0, ac, av);
    if(i < 1)
        i = 1;
    x->x_vis_w = i;
    if(ac > 1)
    {
        i = (int)atom_getintarg(1, ac, av);
        if(i < 1)
            i = 1;
    }
    x->x_vis_h = i;
    if(glist_isvisible(x->x_gui.x_glist))
        (*x->x_gui.x_draw)(x, x->x_gui.x_glist, IEM_GUI_DRAW_MODE_MOVE);
}

static void my_canvas_color(t_my_canvas *x, t_symbol *s, int ac, t_atom *av)
{iemgui_color((void *)x, &x->x_gui, s, ac, av);}

static void my_canvas_send(t_my_canvas *x, t_symbol *s)
{iemgui_send(x, &x->x_gui, s);}

static void my_canvas_receive(t_my_canvas *x, t_symbol *s)
{iemgui_receive(x, &x->x_gui, s);}

static void my_canvas_label(t_my_canvas *x, t_symbol *s)
{iemgui_label((void *)x, &x->x_gui, s);}

static void my_canvas_label_pos(t_my_canvas *x, t_symbol *s, int ac, t_atom *av)
{iemgui_label_pos((void *)x, &x->x_gui, s, ac, av);}

static void my_canvas_label_font(t_my_canvas *x, t_symbol *s, int ac, t_atom *av)
{iemgui_label_font((void *)x, &x->x_gui, s, ac, av);}

static void *my_canvas_new(t_symbol *s, int argc, t_atom *argv)
{
    t_my_canvas *x = (t_my_canvas *)pd_new(my_canvas_class);
    int bflcol[]={-233017, -1, -66577};
    int a=IEM_GUI_DEFAULTSIZE, w=100, h=60;
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    int ldx=20, ldy=12, i=0;
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    int fs=14;

    iem_inttosymargs(&x->x_gui.x_isa, 0);
    iem_inttofstyle(&x->x_gui.x_fsf, 0);

    if(((argc >= 10)&&(argc <= 13))
       &&IS_A_FLOAT(argv,0)&&IS_A_FLOAT(argv,1)&&IS_A_FLOAT(argv,2))
    {
        a = (int)atom_getintarg(0, argc, argv);
        w = (int)atom_getintarg(1, argc, argv);
        h = (int)atom_getintarg(2, argc, argv);
    }
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    if((argc >= 12) && (IS_A_SYMBOL(argv,3) || IS_A_FLOAT(argv,3)) &&
        (IS_A_SYMBOL(argv,4) || IS_A_FLOAT(argv,4)))
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    {
        i = 2;
        iemgui_new_getnames(&x->x_gui, 3, argv);
    }
    else if((argc == 11)&&(IS_A_SYMBOL(argv,3)||IS_A_FLOAT(argv,3)))
    {
        i = 1;
        iemgui_new_getnames(&x->x_gui, 3, argv);
    }
    else iemgui_new_getnames(&x->x_gui, 3, 0);

    if(((argc >= 10)&&(argc <= 13))
       &&(IS_A_SYMBOL(argv,i+3)||IS_A_FLOAT(argv,i+3))&&IS_A_FLOAT(argv,i+4)
       &&IS_A_FLOAT(argv,i+5)&&IS_A_FLOAT(argv,i+6)
       &&IS_A_FLOAT(argv,i+7)&&IS_A_FLOAT(argv,i+8)
       &&IS_A_FLOAT(argv,i+9))
    {
            /* disastrously, the "label" sits in a different part of the
            message.  So we have to track its location separately (in
            the slot x_labelbindex) and initialize it specially here. */
        iemgui_new_dogetname(&x->x_gui, i+3, argv);
        x->x_gui.x_labelbindex = i+4;
        ldx = (int)atom_getintarg(i+4, argc, argv);
        ldy = (int)atom_getintarg(i+5, argc, argv);
        iem_inttofstyle(&x->x_gui.x_fsf, atom_getintarg(i+6, argc, argv));
        fs = (int)atom_getintarg(i+7, argc, argv);
        bflcol[0] = (int)atom_getintarg(i+8, argc, argv);
        bflcol[2] = (int)atom_getintarg(i+9, argc, argv);
    }
    if((argc == 13)&&IS_A_FLOAT(argv,i+10))
    {
        iem_inttosymargs(&x->x_gui.x_isa, atom_getintarg(i+10, argc, argv));
    }
    x->x_gui.x_draw = (t_iemfunptr)my_canvas_draw;
    x->x_gui.x_fsf.x_snd_able = 1;
    x->x_gui.x_fsf.x_rcv_able = 1;
    x->x_gui.x_glist = (t_glist *)canvas_getcurrent();
    if (!strcmp(x->x_gui.x_snd->s_name, "empty"))
        x->x_gui.x_fsf.x_snd_able = 0;
    if (!strcmp(x->x_gui.x_rcv->s_name, "empty"))
        x->x_gui.x_fsf.x_rcv_able = 0;
    if(a < 1)
        a = 1;
    x->x_gui.x_w = a;
    x->x_gui.x_h = x->x_gui.x_w;
    if(w < 1)
        w = 1;
    x->x_vis_w = w;
    if(h < 1)
        h = 1;
    x->x_vis_h = h;
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    if(x->x_gui.x_fsf.x_font_style == 1)
        strcpy(x->x_gui.x_font, "helvetica");
    else if(x->x_gui.x_fsf.x_font_style == 2)
        strcpy(x->x_gui.x_font, "times");
    else
    {
        x->x_gui.x_fsf.x_font_style = 0;
        strcpy(x->x_gui.x_font, sys_font);
    }
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    if (x->x_gui.x_fsf.x_rcv_able)
        pd_bind(&x->x_gui.x_obj.ob_pd, x->x_gui.x_rcv);
    x->x_gui.x_ldx = ldx;
    x->x_gui.x_ldy = ldy;
    if(fs < 4)
        fs = 4;
    x->x_gui.x_fontsize = fs;
    iemgui_all_colfromload(&x->x_gui, bflcol);
    x->x_at[0].a_type = A_FLOAT;
    x->x_at[1].a_type = A_FLOAT;
    iemgui_verify_snd_ne_rcv(&x->x_gui);
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    /* scale handle init */
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    t_scalehandle *sh;
    char buf[64];
    x->x_gui.x_handle = pd_new(scalehandle_class);
    sh = (t_scalehandle *)x->x_gui.x_handle;
    sh->h_master = (t_gobj*)x;
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    sprintf(buf, "_h%lx", (t_int)sh);
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    pd_bind(x->x_gui.x_handle, sh->h_bindsym = gensym(buf));
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    sprintf(sh->h_outlinetag, "h%lx", (t_int)sh);
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    sh->h_dragon = 0;
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    sh->h_scale = 1;
    x->x_gui.scale_offset_x = 0;
    x->x_gui.scale_offset_y = 0;
    x->x_gui.scale_vis = 0;

    /* label handle init */
    t_scalehandle *lh;
    char lhbuf[64];
    x->x_gui.x_lhandle = pd_new(scalehandle_class);
    lh = (t_scalehandle *)x->x_gui.x_lhandle;
    lh->h_master = (t_gobj*)x;
    sprintf(lhbuf, "_h%lx", (t_int)lh);
    pd_bind(x->x_gui.x_lhandle, lh->h_bindsym = gensym(lhbuf));
    sprintf(lh->h_outlinetag, "h%lx", (t_int)lh);
    lh->h_dragon = 0;
    lh->h_scale = 0;
    x->x_gui.label_offset_x = 0;
    x->x_gui.label_offset_y = 0;
    x->x_gui.label_vis = 0;

    x->x_gui.x_obj.te_iemgui = 1;
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    return (x);
}

static void my_canvas_ff(t_my_canvas *x)
{
    if(x->x_gui.x_fsf.x_rcv_able)
        pd_unbind(&x->x_gui.x_obj.ob_pd, x->x_gui.x_rcv);
    gfxstub_deleteforkey(x);
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    /* scale handle deconstructor */
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    if (x->x_gui.x_handle)
    {
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        pd_unbind(x->x_gui.x_handle,
            ((t_scalehandle *)x->x_gui.x_handle)->h_bindsym);
        pd_free(x->x_gui.x_handle);
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    }
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    /* label handle deconstructor */
    if (x->x_gui.x_lhandle)
    {
        pd_unbind(x->x_gui.x_lhandle,
            ((t_scalehandle *)x->x_gui.x_lhandle)->h_bindsym);
        pd_free(x->x_gui.x_lhandle);
    }
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}

void g_mycanvas_setup(void)
{
    my_canvas_class = class_new(gensym("cnv"), (t_newmethod)my_canvas_new,
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        (t_method)my_canvas_ff, sizeof(t_my_canvas), CLASS_NOINLET, A_GIMME, 0);
    class_addcreator((t_newmethod)my_canvas_new,
        gensym("my_canvas"), A_GIMME, 0);
    class_addmethod(my_canvas_class, (t_method)my_canvas_dialog,
        gensym("dialog"), A_GIMME, 0);
    class_addmethod(my_canvas_class, (t_method)my_canvas_size,
        gensym("size"), A_GIMME, 0);
    class_addmethod(my_canvas_class, (t_method)my_canvas_delta,
        gensym("delta"), A_GIMME, 0);
    class_addmethod(my_canvas_class, (t_method)my_canvas_pos,
        gensym("pos"), A_GIMME, 0);
    class_addmethod(my_canvas_class, (t_method)my_canvas_vis_size,
        gensym("vis_size"), A_GIMME, 0);
    class_addmethod(my_canvas_class, (t_method)my_canvas_color,
        gensym("color"), A_GIMME, 0);
    class_addmethod(my_canvas_class, (t_method)my_canvas_send,
        gensym("send"), A_DEFSYM, 0);
    class_addmethod(my_canvas_class, (t_method)my_canvas_receive,
        gensym("receive"), A_DEFSYM, 0);
    class_addmethod(my_canvas_class, (t_method)my_canvas_label,
        gensym("label"), A_DEFSYM, 0);
    class_addmethod(my_canvas_class, (t_method)my_canvas_label_pos,
        gensym("label_pos"), A_GIMME, 0);
    class_addmethod(my_canvas_class, (t_method)my_canvas_label_font,
        gensym("label_font"), A_GIMME, 0);
    class_addmethod(my_canvas_class, (t_method)my_canvas_get_pos,
        gensym("get_pos"), 0);
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    scalehandle_class = class_new(gensym("_scalehandle"), 0, 0,
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                  sizeof(t_scalehandle), CLASS_PD, 0);
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    class_addmethod(scalehandle_class, (t_method)my_canvas__clickhook,
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            gensym("_click"), A_FLOAT, A_FLOAT, A_FLOAT, 0);
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    class_addmethod(scalehandle_class, (t_method)my_canvas__motionhook,
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            gensym("_motion"), A_FLOAT, A_FLOAT, 0);
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    my_canvas_widgetbehavior.w_getrectfn = my_canvas_getrect;
    my_canvas_widgetbehavior.w_displacefn = iemgui_displace;
    my_canvas_widgetbehavior.w_selectfn = iemgui_select;
    my_canvas_widgetbehavior.w_activatefn = NULL;
    my_canvas_widgetbehavior.w_deletefn = iemgui_delete;
    my_canvas_widgetbehavior.w_visfn = iemgui_vis;
    my_canvas_widgetbehavior.w_clickfn = NULL;
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    my_canvas_widgetbehavior.w_displacefnwtag = iemgui_displace_withtag;
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    class_setwidget(my_canvas_class, &my_canvas_widgetbehavior);
    class_sethelpsymbol(my_canvas_class, gensym("my_canvas"));
    class_setsavefn(my_canvas_class, my_canvas_save);
    class_setpropertiesfn(my_canvas_class, my_canvas_properties);
}