//// "$Id: Fl_Tile.cxx,v 1.1.1.1 2003/08/07 21:18:40 jasonk Exp $"//// Tile widget for the Fast Light Tool Kit (FLTK).//// Copyright 1998-1999 by Bill Spitzak and others.//// 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.//// Please report all bugs and problems to "fltk-bugs@easysw.com".//// Group of 2 or 4 "tiles" that can be resized by dragging border// The size of the first child determines where the resize border is.// The resizebox is used to limit where the border can be dragged to.#include <FL/Fl.H>#include <FL/Fl_Tile.H>#include <FL/Fl_Window.H>#include <stdlib.h>// Drag the edges that were initially at oldx,oldy to newx,newy:// pass zero as oldx or oldy to disable drag in that direction:void Fl_Tile::position(int oix, int oiy, int newx, int newy) {  Fl_Widget*const* a = array();  short* p = sizes();  p += 8; // skip group & resizable's saved size  for (int i=children(); i--; p += 4) {    Fl_Widget* o = *a++;    if (o == resizable()) continue;    int X = o->x();    int R = X+o->w();    if (oix) {      int t = p[0];      if (t == oix || t>oix && X<newx || t<oix && X>newx) X = newx;      t = p[1];      if (t == oix || t>oix && R<newx || t<oix && R>newx) R = newx;    }    int Y = o->y();    int B = Y+o->h();    if (oiy) {      int t = p[2];      if (t == oiy || t>oiy && Y<newy || t<oiy && Y>newy) Y = newy;      t = p[3];      if (t == oiy || t>oiy && B<newy || t<oiy && B>newy) B = newy;    }    o->damage_resize(X,Y,R-X,B-Y);  }}// move the lower-right corner (sort of):void Fl_Tile::resize(int X,int Y,int W,int H) {  // remember how much to move the child widgets:  int dx = X-x();  int dy = Y-y();  int dw = W-w();  int dh = H-h();  short* p = sizes();  // resize this (skip the Fl_Group resize):  Fl_Widget::resize(X,Y,W,H);  // find bottom-right of resiable:  int OR = p[5];  int NR = X+W-(p[1]-OR);  int OB = p[7];  int NB = Y+H-(p[3]-OB);  // move everything to be on correct side of new resizable:  Fl_Widget*const* a = array();  p += 8;  for (int i=children(); i--;) {    Fl_Widget* o = *a++;    int X = o->x()+dx;    int R = X+o->w();    if (*p++ >= OR) X += dw; else if (X > NR) X = NR;    if (*p++ >= OR) R += dw; else if (R > NR) R = NR;    int Y = o->y()+dy;    int B = Y+o->h();    if (*p++ >= OB) Y += dh; else if (Y > NB) Y = NB;    if (*p++ >= OB) B += dh; else if (B > NB) B = NB;    o->resize(X,Y,R-X,B-Y); o->redraw();  }}static void set_cursor(Fl_Tile*t, Fl_Cursor c) {  static Fl_Cursor cursor;  if (cursor == c) return;  cursor = c;#ifdef __sgi  t->window()->cursor(c,FL_RED,FL_WHITE);#else  t->window()->cursor(c);#endif}static Fl_Cursor cursors[4] = {  FL_CURSOR_DEFAULT,  FL_CURSOR_WE,  FL_CURSOR_NS,  FL_CURSOR_MOVE};int Fl_Tile::handle(int event) {  static int sdrag;  static int sdx, sdy;  static int sx, sy;#define DRAGH 1#define DRAGV 2#define GRABAREA 4  int mx = Fl::event_x();  int my = Fl::event_y();  switch (event) {  case FL_MOVE:  case FL_ENTER:  case FL_PUSH: {    int mindx = 100;    int mindy = 100;    int oldx = 0;    int oldy = 0;    Fl_Widget*const* a = array();    short* q = sizes();    short* p = q+8;    for (int i=children(); i--; p += 4) {      Fl_Widget* o = *a++;      if (o == resizable()) continue;      if (p[1]<q[1] && o->y()<=my+GRABAREA && o->y()+o->h()>=my-GRABAREA) {	int t = mx - (o->x()+o->w());	if (abs(t) < mindx) {	  sdx = t;	  mindx = abs(t);	  oldx = p[1];	}      }      if (p[3]<q[3] && o->x()<=mx+GRABAREA && o->x()+o->w()>=mx-GRABAREA) {	int t = my - (o->y()+o->h());	if (abs(t) < mindy) {	  sdy = t;	  mindy = abs(t);	  oldy = p[3];	}      }    }    sdrag = 0; sx = sy = 0;    if (mindx <= GRABAREA) {sdrag = DRAGH; sx = oldx;}    if (mindy <= GRABAREA) {sdrag |= DRAGV; sy = oldy;}    set_cursor(this, cursors[sdrag]);    if (sdrag) return 1;    return Fl_Group::handle(event);  }  case FL_LEAVE:    set_cursor(this, FL_CURSOR_DEFAULT);    break;  case FL_DRAG:    // This is necessary if CONSOLIDATE_MOTION in Fl_x.C is turned off:    // if (damage()) return 1; // don't fall behind  case FL_RELEASE: {    if (!sdrag) return 0; // should not happen    Fl_Widget* r = resizable(); if (!r) r = this;    int newx;    if (sdrag&DRAGH) {      newx = Fl::event_x()-sdx;      if (newx < r->x()) newx = r->x();      else if (newx > r->x()+r->w()) newx = r->x()+r->w();    } else      newx = sx;    int newy;    if (sdrag&DRAGV) {      newy = Fl::event_y()-sdy;      if (newy < r->y()) newy = r->y();      else if (newy > r->y()+r->h()) newy = r->y()+r->h();    } else      newy = sy;    position(sx,sy,newx,newy);    do_callback();    return 1;}  }  return Fl_Group::handle(event);}//// End of "$Id: Fl_Tile.cxx,v 1.1.1.1 2003/08/07 21:18:40 jasonk Exp $".//