fl_group.cxx

SRI international 发布的OAA框架软件

      return 0;
    }
    Fl_Widget* o = array_[i];
    if (o == previous) return 0;
    switch (key) {
    case FL_Down:
    case FL_Up:
      // for up/down, the widgets have to overlap horizontally:
      if (o->x() >= previous->x()+previous->w() ||
	  o->x()+o->w() <= previous->x()) continue;
    }
    if (o->take_focus()) return 1;
  }
}

////////////////////////////////////////////////////////////////

Fl_Group::Fl_Group(int X,int Y,int W,int H,const char *l)
: Fl_Widget(X,Y,W,H,l) {
  align(FL_ALIGN_TOP);
  children_ = 0;
  array_ = 0;
  savedfocus_ = 0;
  resizable_ = this;
  sizes_ = 0; // this is allocated when first resize() is done
  // Subclasses may want to construct child objects as part of their
  // constructor, so make sure they are add()'d to this object.
  // But you must end() the object!
  begin();
}

void Fl_Group::clear() {
  Fl_Widget*const* old_array = array();
  int old_children = children();
  // clear everything now, in case fl_fix_focus recursively calls us:
  children_ = 0;
  //array_ = 0; //dont do this, it will clobber old_array if only one child
  savedfocus_ = 0;
  resizable_ = this;
  init_sizes();
  // okay, now it is safe to destroy the children:
  Fl_Widget*const* a = old_array;
  for (int i=old_children; i--;) {
    Fl_Widget* o = *a++;
    if (o->parent() == this) delete o;
  }
  if (old_children > 1) free((void*)old_array);
}

Fl_Group::~Fl_Group() {
  clear();
}

void Fl_Group::insert(Fl_Widget &o, int index) {
  if (o.parent()) {
    Fl_Group* g = (Fl_Group*)(o.parent());
    int n = g->find(o);
    if (g == this) {
      if (index > n) index--;
      if (index == n) return;
    }
    g->remove(o);
  }
  o.parent_ = this;
  if (children_ == 0) { // use array pointer to point at single child
    array_ = (Fl_Widget**)&o;
  } else if (children_ == 1) { // go from 1 to 2 children
    Fl_Widget* t = (Fl_Widget*)array_;
    array_ = (Fl_Widget**)malloc(2*sizeof(Fl_Widget*));
    if (index) {array_[0] = t; array_[1] = &o;}
    else {array_[0] = &o; array_[1] = t;}
  } else {
    if (!(children_ & (children_-1))) // double number of children
      array_ = (Fl_Widget**)realloc((void*)array_,
				    2*children_*sizeof(Fl_Widget*));
    int j; for (j = children_; j > index; j--) array_[j] = array_[j-1];
    array_[j] = &o;
  }
  children_++;
  init_sizes();
}

void Fl_Group::add(Fl_Widget &o) {insert(o, children_);}

void Fl_Group::remove(Fl_Widget &o) {
  if (!children_) return;
  int i = find(o);
  if (i >= children_) return;
  if (&o == savedfocus_) savedfocus_ = 0;
  o.parent_ = 0;
  children_--;
  if (children_ == 1) { // go from 2 to 1 child
    Fl_Widget *t = array_[!i];
    free((void*)array_);
    array_ = (Fl_Widget**)t;
  } else if (children_ > 1) { // delete from array
    for (; i < children_; i++) array_[i] = array_[i+1];
  }
  init_sizes();
}

////////////////////////////////////////////////////////////////

// Rather lame kludge here, I need to detect windows and ignore the
// changes to X,Y, since all children are relative to X,Y.  That
// is why I check type():

// sizes array stores the initial positions of widgets as
// left,right,top,bottom quads.  The first quad is the group, the
// second is the resizable (clipped to the group), and the
// rest are the children.  This is a convienent order for the
// algorithim.  If you change this be sure to fix Fl_Tile which
// also uses this array!

void Fl_Group::init_sizes() {
  delete[] sizes_; sizes_ = 0;
}

short* Fl_Group::sizes() {
  if (!sizes_) {
    short* p = sizes_ = new short[4*(children_+2)];
    // first thing in sizes array is the group's size:
    if (type() < FL_WINDOW) {p[0] = x(); p[2] = y();} else {p[0] = p[2] = 0;}
    p[1] = p[0]+w(); p[3] = p[2]+h();
    // next is the resizable's size:
    p[4] = p[0]; // init to the group's size
    p[5] = p[1];
    p[6] = p[2];
    p[7] = p[3];
    Fl_Widget* r = resizable();
    if (r && r != this) { // then clip the resizable to it
      int t;
      t = r->x(); if (t > p[0]) p[4] = t;
      t +=r->w(); if (t < p[1]) p[5] = t;
      t = r->y(); if (t > p[2]) p[6] = t;
      t +=r->h(); if (t < p[3]) p[7] = t;
    }
    // next is all the children's sizes:
    p += 8;
    Fl_Widget*const* a = array();
    for (int i=children_; i--;) {
      Fl_Widget* o = *a++;
      *p++ = o->x();
      *p++ = o->x()+o->w();
      *p++ = o->y();
      *p++ = o->y()+o->h();
    }
  }
  return sizes_;
}

void Fl_Group::resize(int X, int Y, int W, int H) {

  if (!resizable() || W==w() && H==h() ) {

    if (type() < FL_WINDOW) {
      int dx = X-x();
      int dy = Y-y();
      Fl_Widget*const* a = array();
      for (int i=children_; i--;) {
	Fl_Widget* o = *a++;
	o->resize(o->x()+dx, o->y()+dy, o->w(), o->h());
      }
    }

  } else if (children_) {

    short* p = sizes();

    // get changes in size/position from the initial size:
    int dx = X - p[0];
    int dw = W - (p[1]-p[0]);
    int dy = Y - p[2];
    int dh = H - (p[3]-p[2]);
    if (type() >= FL_WINDOW) dx = dy = 0;
    p += 4;

    // get initial size of resizable():
    int IX = *p++;
    int IR = *p++;
    int IY = *p++;
    int IB = *p++;

    Fl_Widget*const* a = array();
    for (int i=children_; i--;) {
      Fl_Widget* o = *a++;
#if 1
      int XX = *p++;
      if (XX >= IR) XX += dw;
      else if (XX > IX) XX = IX+((XX-IX)*(IR+dw-IX)+(IR-IX)/2)/(IR-IX);
      int R = *p++;
      if (R >= IR) R += dw;
      else if (R > IX) R = IX+((R-IX)*(IR+dw-IX)+(IR-IX)/2)/(IR-IX);

      int YY = *p++;
      if (YY >= IB) YY += dh;
      else if (YY > IY) YY = IY+((YY-IY)*(IB+dh-IY)+(IB-IY)/2)/(IB-IY);
      int B = *p++;
      if (B >= IB) B += dh;
      else if (B > IY) B = IY+((B-IY)*(IB+dh-IY)+(IB-IY)/2)/(IB-IY);
#else // much simpler code from Francois Ostiguy:
      int XX = *p++;
      if (XX >= IR) XX += dw;
      else if (XX > IX) XX += dw * (XX-IX)/(IR-IX);
      int R = *p++;
      if (R >= IR) R += dw;
      else if (R > IX) R = R + dw * (R-IX)/(IR-IX);

      int YY = *p++;
      if (YY >= IB) YY += dh;
      else if (YY > IY) YY = YY + dh*(YY-IY)/(IB-IY);
      int B = *p++;
      if (B >= IB) B += dh;
      else if (B > IY) B = B + dh*(B-IY)/(IB-IY);
#endif
      o->resize(XX+dx, YY+dy, R-XX, B-YY);
    }
  }

  Fl_Widget::resize(X,Y,W,H);
}

void Fl_Group::draw_children() {
  Fl_Widget*const* a = array();
  if (damage() & ~FL_DAMAGE_CHILD) { // redraw the entire thing:
    for (int i=children_; i--;) {
      Fl_Widget& o = **a++;
      draw_child(o);
      draw_outside_label(o);
    }
  } else {	// only redraw the children that need it:
    for (int i=children_; i--;) update_child(**a++);
  }
}

void Fl_Group::draw() {
  if (damage() & ~FL_DAMAGE_CHILD) { // redraw the entire thing:
    draw_box();
    draw_label();
  }
  draw_children();
}

// Draw a child only if it needs it:
void Fl_Group::update_child(Fl_Widget& widget) const {
  if (widget.damage() && widget.visible() && widget.type() < FL_WINDOW &&
      fl_not_clipped(widget.x(), widget.y(), widget.w(), widget.h())) {
    widget.draw();	
    widget.clear_damage();
  }
}

// Force a child to redraw:
void Fl_Group::draw_child(Fl_Widget& widget) const {
  if (widget.visible() && widget.type() < FL_WINDOW &&
      fl_not_clipped(widget.x(), widget.y(), widget.w(), widget.h())) {
    widget.clear_damage(FL_DAMAGE_ALL);
    widget.draw();
    widget.clear_damage();
  }
}

extern char fl_draw_shortcut;

// Parents normally call this to draw outside labels:
void Fl_Group::draw_outside_label(const Fl_Widget& widget) const {
  if (!widget.visible()) return;
  // skip any labels that are inside the widget:
  if (!(widget.align()&15) || (widget.align() & FL_ALIGN_INSIDE)) return;
  // invent a box that is outside the widget:
  int a = widget.align();
  int X = widget.x();
  int Y = widget.y();
  int W = widget.w();
  int H = widget.h();
  if (a & FL_ALIGN_TOP) {
    a ^= (FL_ALIGN_BOTTOM|FL_ALIGN_TOP);
    Y = y();
    H = widget.y()-Y;
  } else if (a & FL_ALIGN_BOTTOM) {
    a ^= (FL_ALIGN_BOTTOM|FL_ALIGN_TOP);
    Y = Y+H;
    H = y()+h()-Y;
  } else if (a & FL_ALIGN_LEFT) {
    a ^= (FL_ALIGN_LEFT|FL_ALIGN_RIGHT);
    X = x();
    W = widget.x()-X-3;
  } else if (a & FL_ALIGN_RIGHT) {
    a ^= (FL_ALIGN_LEFT|FL_ALIGN_RIGHT);
    X = X+W+3;
    W = x()+this->w()-X;
  }
  widget.draw_label(X,Y,W,H,(Fl_Align)a);
}

//
// End of "$Id: Fl_Group.cxx,v 1.1.1.1 2003/06/03 22:25:42 agno Exp $".
//