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scroller.cpp

#include "scroller.hpp"
#define HS_ICON_W 10
#define HS_ICON_H 8


unsigned char hs_left_arrow[10*8]={
    0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0,
    0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0,
    1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1,
    1, 1, 1, 1, 2, 0, 1, 1, 2, 2, 2, 2, 2, 2, 2,
    0, 0, 1, 1, 2, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1,
    2, 0, 0, 0, 0};


unsigned char hs_right_arrow[10*8]={
    0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0,
    0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0,
    0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1,
    1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 1, 1, 0,
    0, 0, 0, 0, 0, 2, 1, 1, 0, 0, 0, 0, 0, 0, 2,
    1, 1, 0, 0, 0};


unsigned char vs_up_arrow[8*10]={
    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 2, 0,
    0, 0, 0, 1, 1, 1, 1, 2, 0, 0, 1, 2, 1, 1, 2,
    1, 2, 0, 0, 0, 1, 1, 2, 0, 0, 0, 0, 0, 1, 1,
    2, 0, 0, 0, 0, 0, 1, 1, 2, 0, 0, 0, 0, 0, 1,
    1, 2, 0, 0, 0, 0, 0, 1, 1, 2, 0, 0, 0, 0, 0,
    0, 2, 2, 0, 0};


unsigned char vs_down_arrow[8*10]={
    0, 0, 0, 0, 2, 2, 0, 0, 0, 0, 0, 1, 1, 2, 0,
    0, 0, 0, 0, 1, 1, 2, 0, 0, 0, 0, 0, 1, 1, 2,
    0, 0, 0, 0, 0, 1, 1, 2, 0, 0, 0, 0, 0, 1, 1,
    2, 0, 0, 0, 1, 2, 1, 1, 2, 1, 2, 0, 0, 1, 1,
    1, 1, 2, 0, 0, 0, 0, 1, 1, 2, 0, 0, 0, 0, 0,
    0, 0, 0, 0, 0};

void show_icon(image *screen, window_manager *wm, int x, int y, int icw, int ich, unsigned char *buf)
{
  short cx1,cy1,cx2,cy2;
  screen->get_clip(cx1,cy1,cx2,cy2);
  unsigned char remap[3];
  remap[0]=wm->medium_color();
  remap[1]=wm->bright_color();
  remap[2]=wm->dark_color();

  for (int yc=ich;yc;yc--,y++)
  {
    if (y>=cy1 && y<=cy2)
    {
      unsigned char *sl=screen->scan_line(y)+x;
      for (int xc=icw,xo=x;xc;xc--,xo++,sl++,buf++)
      {
      if (xo>=cx1 && xo<=cx2)
        *sl=remap[*buf];
      }
    }
  }
  screen->add_dirty(x,y,x+icw-1,y+ich-1);
}

scroller::scroller(int X, int Y, int ID, int L, int H, int Vert, int Total_items, ifield *Next)
{  x=X; y=Y; id=ID; next=Next;  l=L; h=H;  sx=0;  t=Total_items;  drag=-1; vert=Vert;
}


void scroller::area(int &x1, int &y1, int &x2, int &y2, window_manager *wm)
{  
  area_config(wm);
  x1=x-1; y1=y-1;  
  if (vert)
  { x2=x+l+bw();  y2=y+h; }
  else
  { x2=x+l;  y2=y+h+bh(); }
}

void scroller::dragger_area(int &x1, int &y1, int &x2, int &y2)
{  
  if (vert)
  { x1=x+l; y1=y+bh(); x2=x+l+bw()-1; y2=y+h-bh()-1; }
  else { x1=x+bw(); y1=y+h; x2=x+l-bw(); y2=y+h+bh()-1; }
}

int scroller::bh() { if (vert) return 15; else return 13; }
int scroller::bw() { if (vert) return 12; else return 14; }

unsigned char *scroller::b1()
{
  if (vert) return vs_up_arrow;
  else return hs_left_arrow;
}

unsigned char *scroller::b2()
{
  if (vert) return vs_down_arrow;
  else return hs_right_arrow;
}


void scroller::draw_first(image *screen, window_manager *wm)
{
  if (sx>=t) sx=t-1;
  draw(0,screen,wm);
  screen->wiget_bar(b1x(),b1y(),b1x()+bw()-1,b1y()+bh()-1,
                wm->bright_color(),wm->medium_color(),wm->dark_color());
  screen->wiget_bar(b2x(),b2y(),b2x()+bw()-1,b2y()+bh()-1,
                wm->bright_color(),wm->medium_color(),wm->dark_color());
  show_icon(screen,wm,b1x()+2,b1y()+2,bw()-4,bh()-4,b1());
  show_icon(screen,wm,b2x()+2,b2y()+2,bw()-4,bh()-4,b2());

  int x1,y1,x2,y2;
  dragger_area(x1,y1,x2,y2);
  screen->bar(x1,y1,x2,y2,wm->black());
  screen->bar(x1+1,y1+1,x2-1,y2-1,wm->medium_color());   
  draw_wiget(screen,wm,0);
  scroll_event(sx,screen,wm);
}

void scroller::wig_area(int &x1, int &y1, int &x2, int &y2)
{
  int sx1,sy1,sx2,sy2;
  dragger_area(sx1,sy1,sx2,sy2);
  if (vert)
  {
    x1=x+l+1;
    if (t<2)
      y1=y+bh()+1;
    else
      y1=y+bh()+1+sx*(sy2-sy1+1-bh())/(t-1);
  } else
  {
    if (t<2) x1=x+bw()+1;
    else x1=x+bw()+1+sx*(sx2-sx1+1-bw())/(t-1);
    y1=y+h+1;
  }
  x2=x1+bw()-3;
  y2=y1+bh()-3;  
  
}


void scroller::draw_wiget(image *screen, window_manager *wm, int erase)
{ 
  int x1,y1,x2,y2;
  wig_area(x1,y1,x2,y2);
  if (erase)
    screen->bar(x1,y1,x2,y2,wm->medium_color());
  else
    screen->wiget_bar(x1,y1,x2,y2,
                  wm->bright_color(),wm->medium_color(),wm->dark_color());
}

void scroller::draw(int active, image *screen, window_manager *wm)
{
  int x1,y1,x2,y2;
  area(x1,y1,x2,y2,wm);
  screen->rectangle(x1,y1,x2,y2,active ? wm->bright_color() : wm->dark_color());
}


void scroller::handle_event(event &ev, image *screen, window_manager *wm, input_manager *inm)
{
  int mx=ev.mouse_move.x,my=ev.mouse_move.y;
  switch (ev.type)
  {
    case EV_MOUSE_BUTTON :
    {
      if (ev.mouse_button && drag==-1)
      {     
      if (mx>=b1x() && mx<b1x()+bw() && my>=b1y()-2 && my<b1y()+bh())
      {
        if (sx>0)
        {
          draw_wiget(screen,wm,1);
          sx--;
          draw_wiget(screen,wm,0);
          scroll_event(sx,screen,wm);
        }
      } else if (mx>=b2x() && mx<b2x()+bw() && my>=b2y() && my<=b2y()+bh())
      {
        if (sx<t-1)
        {
          draw_wiget(screen,wm,1);
          sx++;
          draw_wiget(screen,wm,0);
          scroll_event(sx,screen,wm);
        }       
      }
      else
      {
        int dx1,dy1,dx2,dy2;
        dragger_area(dx1,dy1,dx2,dy2);
        if (mx>=dx1 && mx<=dx2 && my>=dy1 && my<=dy2)
        {
          int x1,y1,x2,y2;
          wig_area(x1,y1,x2,y2);
          if (mx>=x1 && mx<=x2 && my>=y1 && my<=y2)
          {
            drag=sx;
            inm->grab_focus(this);
          }       
          else if (t>1)
          {
            int nx=mouse_to_drag(mx,my);
            if (nx!=sx && nx>=0 && nx<t)
            {
            draw_wiget(screen,wm,1);
            sx=nx;
            draw_wiget(screen,wm,0);
            scroll_event(sx,screen,wm);         
            }           
          }
        } else handle_inside_event(ev,screen,wm,inm);
      }
      } else if (!ev.mouse_button && drag!=-1)
      {
      inm->release_focus();
      drag=-1;
      }
    } break;

    case EV_MOUSE_MOVE :
    {
      if (drag!=-1)
      {
      int nx=mouse_to_drag(mx,my);
      if (nx<0) nx=0; else if (nx>=t) nx=t-1;
      if (nx!=sx)
      {
        draw_wiget(screen,wm,1);
        sx=nx;
        draw_wiget(screen,wm,0);
        scroll_event(sx,screen,wm);
      }
      } else if ( activate_on_mouse_move())
      {
      int x1,y1,x2,y2;
      wig_area(x1,y1,x2,y2);
      if (mx>=x && mx<=x+l-1 && my>=y && my<=y+h-1)
        handle_inside_event(ev,screen,wm,inm);
      }

    } break;
    case EV_KEY :
    {
      switch (ev.key)
      {
      case JK_LEFT : 
      { handle_left(screen,wm,inm); } break;
      case JK_RIGHT : 
      { handle_right(screen,wm,inm); } break;
      case JK_UP : 
      { handle_up(screen,wm,inm); } break;
      case JK_DOWN : 
      { handle_down(screen,wm,inm); } break;

      default :
        handle_inside_event(ev,screen,wm,inm);
      }
    } break;
  }
}


void scroller::handle_right(image *screen, window_manager *wm, input_manager *inm)
{
  if (!vert && sx<t-1)
  {
    draw_wiget(screen,wm,1);
    sx++;
    draw_wiget(screen,wm,0);
    scroll_event(sx,screen,wm);         
  }
}

void scroller::handle_left(image *screen, window_manager *wm, input_manager *inm)
{
  if (!vert && sx>1)
  {
    draw_wiget(screen,wm,1);
    sx--;
    draw_wiget(screen,wm,0);
    scroll_event(sx,screen,wm);         
  }
}

void scroller::handle_up(image *screen, window_manager *wm, input_manager *inm)
{ 
  if (vert && sx>1)
  {
    draw_wiget(screen,wm,1);
    sx--;
    draw_wiget(screen,wm,0);
    scroll_event(sx,screen,wm);         
  }
}

void scroller::handle_down(image *screen, window_manager *wm, input_manager *inm)
{
  if (vert && sx<t-1)
  {
    draw_wiget(screen,wm,1);
    sx++;
    draw_wiget(screen,wm,0);
    scroll_event(sx,screen,wm);         
  }
}

void scroller::set_x (int x, image *screen, window_manager *wm)
{
  if (x<0) x=0;
  if (x>=t) x=t-1;
  if (x!=sx)
  {
    draw_wiget(screen,wm,1);
    sx=x;
    draw_wiget(screen,wm,0);
    scroll_event(sx,screen,wm);         
  }
}

int scroller::mouse_to_drag(int mx,int my)
{
  int x1,y1,x2,y2;
  dragger_area(x1,y1,x2,y2);
  
  if (vert)
  {
    int h=(y2-y1+1-bh());
    if (h) 
      return (my-y-bh()-bh()/2)*(t-1)/h;
    else return 0;
  }
  else 
  {
    int w=(x2-x1+1-bw());
    if (w)
      return (mx-x-bw()-bw()/2)*(t-1)/w;
    else return 0;
  }
}


void scroller::scroll_event(int newx, image *screen, window_manager *wm)
{
  screen->bar(x,y,x+l-1,y+h-1,wm->black());
  int xa,ya,xo,yo;
  if (vert) { xa=0; ya=30; yo=x+5; yo=y+5; } else { xa=30; ya=0; xo=x+5; yo=y+5; }
  for (int i=newx,c=0;c<30 && i<100;i++,c++)
  {
    char st[10];
    sprintf(st,"%d",i);
    wm->font()->put_string(screen,xo,yo,st,wm->bright_color());
    xo+=xa; yo+=ya;
  }
}

void pick_list::area_config(window_manager *wm)
{
  l=wid*wm->font()->width();
  h=th*(wm->font()->height()+1);  
}

int lis_sort(void const *a, void const *b)
{
  pick_list_item *a1=(pick_list_item *)a;
  pick_list_item *a2=(pick_list_item *)b;
  return strcmp(a1->name,a2->name);
}

pick_list::pick_list(int X, int Y, int ID, int height,
          char **List, int num_entries, int start_yoffset, ifield *Next, image *texture)
     : scroller(X,Y,ID,2,2,1,0,Next)
{
  th=height;
  tex=texture;
  t=num_entries;
  wid=0;
  key_hist_total=0;
  lis=(pick_list_item *)jmalloc(sizeof(pick_list_item)*num_entries,"pick list");
  int i=0;
  for (;i<num_entries;i++)
  {
    lis[i].name=List[i];
    lis[i].number=i;
  }
  qsort((void *)lis,num_entries,sizeof(pick_list_item),lis_sort);

  for (i=0;i<t;i++)
    if (strlen(List[i])>wid) 
      wid=strlen(List[i]);
  cur_sel=sx=start_yoffset;
}

void pick_list::handle_inside_event(event &ev, image *screen, window_manager *wm, input_manager *inm)
{
  if (ev.type==EV_MOUSE_MOVE && activate_on_mouse_move())
  {
    int sel=last_sel+(ev.mouse_move.y-y)/(wm->font()->height()+1);
    if (sel!=cur_sel && sel<t && sel>=0)
    {
      cur_sel=sel;
      scroll_event(last_sel,screen,wm);
    }    
  }
  else if (ev.type==EV_MOUSE_BUTTON)
  {  
    int sel=last_sel+(ev.mouse_move.y-y)/(wm->font()->height()+1);
    if (sel<t && sel>=0)
    {
      if (sel==cur_sel)
      wm->push_event(new event(id,(char *)this));
      else 
      {
      cur_sel=sel;
      scroll_event(last_sel,screen,wm);
      }      
    }
  } else if (ev.type==EV_KEY && ev.key==JK_ENTER)  
    wm->push_event(new event(id,(char *)this));
  else if (ev.type==EV_KEY)
  {
    int found=-1;
    if (key_hist_total<20)
      key_hist[key_hist_total++]=ev.key;

    for (int i=0;i<t && found==-1;i++)
    {
      if (strlen(lis[i].name)>=key_hist_total && memcmp(lis[i].name,key_hist,key_hist_total)==0)
      found=i;
    }
    if (found!=-1)
    {
      sx=found;
      cur_sel=found;
      scroll_event(sx,screen,wm);
    } else key_hist_total=0;
  }
}

void pick_list::handle_up(image *screen, window_manager *wm, input_manager *inm)
{
  if (cur_sel>0)
    cur_sel--;
  else return ;
  if (cur_sel<sx)
  {
    draw_wiget(screen,wm,1);
    sx=cur_sel;
    draw_wiget(screen,wm,0);
  }
  scroll_event(sx,screen,wm);           
}

void pick_list::handle_down(image *screen, window_manager *wm, input_manager *inm)
{
  if (cur_sel<t-1)
    cur_sel++;
  else return ;
  if (cur_sel>sx+th-1)
  {
    draw_wiget(screen,wm,1);
    sx=cur_sel-th+1;
    draw_wiget(screen,wm,0);
  }
  scroll_event(sx,screen,wm);           
}

void pick_list::scroll_event(int newx, image *screen, window_manager *wm)
{
  last_sel=newx;
  if (tex)
  {
    short cx1,cy1,cx2,cy2;
    screen->get_clip(cx1,cy1,cx2,cy2);
    screen->set_clip(x,y,x+l-1,y+h-1);
    int tw=(l+tex->width()-1)/tex->width();
    int th=(h+tex->height()-1)/tex->height();
    int dy=y,dx;
    for (int j=0;j<th;j++,dy+=tex->height())
      for (int i=0,dx=x;i<tw;i++,dx+=tex->width())      
        tex->put_image(screen,dx,dy);

    screen->set_clip(cx1,cy1,cx2,cy2);
  } else screen->bar(x,y,x+l-1,y+h-1,wm->black());

  int dy=y;
  for (int i=0;i<th;i++,dy+=wm->font()->height()+1)
  {
    if (i+newx==cur_sel)
      screen->bar(x,dy,x+wid*wm->font()->width()-1,dy+wm->font()->height(),wm->dark_color());
    if (i+newx<t)
      wm->font()->put_string(screen,x,dy,lis[i+newx].name,wm->bright_color());
  } 
}




spicker::spicker(int X, int Y, int ID, int Rows, int Cols, int Vert, int MultiSelect, 
             ifield *Next)
     : scroller(X,Y,ID,2,2,Vert,0,Next)
{
  l=-1;
  last_click=-1;
  r=Rows;
  c=Cols;
  m=MultiSelect;
  select=NULL;
}

void spicker::set_select(int x, int on)
{
  if (m)
  {
    if (on)
      select[x/8]|=1<<(x&7);
    else
      select[x/8]&=(0xff-(1<<(x&7)));
  } else cur_sel=x;  
}

int spicker::get_select(int x)
{
  if (m)
    return select[x/8]&(1<<(x&7));
  else return (x==cur_sel);
}

int spicker::first_selected()
{
  if (m)
  {
    for (int i=0;i<t;i++)
      if (get_select(i)) return i;
    return -1;
  } else return cur_sel;
}

void spicker::reconfigure()
{
  if (select)
    jfree(select);
  select=NULL;


  t=total();
  if (sx>t)
    sx=t-1;
  if (m)
  {
    select=(uchar *)jmalloc((t+7)/8,"selection bit array");
    memset(select,0,(t+7)/8);
  } else cur_sel=0;
}

void spicker::draw_background(window_manager *wm, image *screen)
{
  screen->bar(x,y,x+l-1,y+h-1,wm->dark_color());
}


void spicker::area_config(window_manager *wm)
{
  if (vert)
    l=item_width(wm)+4;
  else
    l=item_width(wm)*c+4;

  if (vert)
    h=item_height(wm)*r+4;
  else
    h=item_height(wm)+4;

}

void spicker::set_x(int x, image *screen, window_manager *wm)
{
  cur_sel=x;
  sx=x;
  scroll_event(x,screen,wm);
}


void spicker::scroll_event(int newx, image *screen, window_manager *wm)
{
  last_sel=newx;
  int xa,ya,xo,yo;
  xo=x+2;
  yo=y+2;
  if (vert) { xa=0; ya=item_height(wm); }
  else { xa=item_width(wm); ya=0; }
  draw_background(wm,screen);

  for (int i=newx;i<newx+vis();i++)
  {
    if (i<t)
    {
      if (m)      
        draw_item(wm,screen,xo,yo,i,get_select(i));
      else
        draw_item(wm,screen,xo,yo,i,i==cur_sel);
    }
    xo+=xa; yo+=ya;
  }
}


void spicker::handle_inside_event(event &ev, image *screen, window_manager *wm, input_manager *inm)
{
  switch (ev.type)
  {
    case EV_MOUSE_MOVE :
    {
      if (activate_on_mouse_move())
      {
      int me;      
      if (vert)
        me=last_sel+(ev.mouse_move.y-y)/item_height(wm);
      else
        me=last_sel+(ev.mouse_move.x-x)/item_width(wm);
      if (me<t && me>=0)
      {
        if (cur_sel!=me)
        {
          cur_sel=me;
          scroll_event(last_sel,screen,wm);
          note_new_current(wm,screen,inm,me);
        }
      }
      }
    } break;
    case EV_MOUSE_BUTTON :
    {
      int me;      
      if (vert)
      me=last_sel+(ev.mouse_move.y-y)/item_height(wm);
      else
      me=last_sel+(ev.mouse_move.x-x)/item_width(wm);
      if (me<t && me>=0)
      {
      if (m)
      {       
        if (ev.mouse_button)
        {
          if (ok_to_select(me))
          {
            set_select(me,!get_select(me));
            scroll_event(last_sel,screen,wm);
            inm->grab_focus(this);
          }
        } else last_click=-1;

      } else if (ok_to_select(me))
      {
        if (cur_sel==me)          
          note_selection(wm,screen,inm,me);
        else
        {
          cur_sel=me;
          scroll_event(last_sel,screen,wm);
          note_new_current(wm,screen,inm,me);
        }
      }
      }
    } break;
  }
}



void spicker::handle_up(image *screen, window_manager *wm, input_manager *inm)
{
  if (vert && cur_sel>0)
  {
    cur_sel--;

    if (cur_sel<sx)
    {
      draw_wiget(screen,wm,1);
      last_sel=sx=cur_sel;
      draw_wiget(screen,wm,0);
    }
    scroll_event(last_sel,screen,wm);
    note_new_current(wm,screen,inm,cur_sel);    
  }
}

void spicker::handle_down(image *screen, window_manager *wm, input_manager *inm)
{
  if (vert && cur_sel<t-1)
    cur_sel++;
  else return ;
  if (cur_sel>sx+r-1)
  {
    draw_wiget(screen,wm,1);
    last_sel=sx=cur_sel-r+1;
    draw_wiget(screen,wm,0);
  }
  scroll_event(sx,screen,wm);
  note_new_current(wm,screen,inm,cur_sel);    
}

void spicker::handle_left(image *screen, window_manager *wm, input_manager *inm)
{
}

void spicker::handle_right(image *screen, window_manager *wm, input_manager *inm)
{
}





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