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//
// "$Id: Fl_Tile.cxx 7765 2010-10-28 18:02:20Z matt $"
//
// Tile widget for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2009 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 on the following page:
//
// http://www.fltk.org/str.php
//
// 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:
/**
Drag the intersection at from_x,from_y to to_x,to_y.
This redraws all the necessary children.
*/
void Fl_Tile::position(int oix, int oiy, int newx, int newy) {
Fl_Widget*const* a = array();
int *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) {
//Fl_Group::resize(X, Y, W, H);
//return;
// remember how much to move the child widgets:
int dx = X-x();
int dy = Y-y();
int dw = W-w();
int dh = H-h();
int *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 xx = o->x()+dx;
int R = xx+o->w();
if (*p++ >= OR) xx += dw; else if (xx > NR) xx = NR;
if (*p++ >= OR) R += dw; else if (R > NR) R = NR;
int yy = o->y()+dy;
int B = yy+o->h();
if (*p++ >= OB) yy += dh; else if (yy > NB) yy = NB;
if (*p++ >= OB) B += dh; else if (B > NB) B = NB;
o->resize(xx,yy,R-xx,B-yy);
// do *not* call o->redraw() here! If you do, and the tile is inside a
// scroll, it'll set the damage areas wrong for all children!
}
}
static void set_cursor(Fl_Tile*t, Fl_Cursor c) {
static Fl_Cursor cursor;
if (cursor == c || !t->window()) 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:
// don't potentially change the mouse cursor if inactive:
if (!active()) break; // will cascade inherited handle()
{
int mindx = 100;
int mindy = 100;
int oldx = 0;
int oldy = 0;
Fl_Widget*const* a = array();
int *q = sizes();
int *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.cxx 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);
if (event == FL_DRAG) set_changed();
do_callback();
return 1;}
}
return Fl_Group::handle(event);
}
//
// End of "$Id: Fl_Tile.cxx 7765 2010-10-28 18:02:20Z matt $".
//
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