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PERSPECT.C
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C/C++ Source or Header
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1980-01-03
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/*
* Copyright (c) 1987, 1988, 1989 Stanford University
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided
* that the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of Stanford not be used in advertising or
* publicity pertaining to distribution of the software without specific,
* written prior permission. Stanford makes no representations about
* the suitability of this software for any purpose. It is provided "as is"
* without express or implied warranty.
*
* STANFORD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
* IN NO EVENT SHALL STANFORD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
* Perspective definition.
*/
#include <InterViews/perspective.h>
#include <InterViews/interactor.h>
class ViewList {
public:
Interactor* view;
ViewList* next;
ViewList (Interactor* i) { view = i; next = nil; }
};
Perspective::Perspective () {
views = nil;
x0 = 0; y0 = 0;
width = 0; height = 0;
curx = 0; cury = 0;
curwidth = 0; curheight = 0;
sx = 0; sy = 0;
lx = 0; ly = 0;
Reference();
}
Perspective::Perspective (Perspective& p) {
views = nil;
x0 = p.x0;
y0 = p.y0;
width = p.width;
height = p.height;
curx = p.curx;
cury = p.cury;
curwidth = p.curwidth;
curheight = p.curheight;
sx = p.sx;
sy = p.sy;
lx = p.lx;
ly = p.ly;
Reference();
}
Perspective::~Perspective () {
register ViewList* e;
register ViewList* next;
for (e = views; e != nil; e = next) {
next = e->next;
delete e;
}
}
void Perspective::Init (Coord ix0, Coord iy0, Coord iwidth, Coord iheight) {
x0 = ix0; y0 = iy0;
width = iwidth; height = iheight;
curx = x0; cury = y0;
}
void Perspective::Attach (Interactor* i) {
register ViewList* e;
e = new ViewList(i);
e->next = views;
views = e;
Reference();
}
void Perspective::Detach (Interactor* i) {
register ViewList* e;
register ViewList* prev;
prev = nil;
for (e = views; e != nil; e = e->next) {
if (e->view == i) {
if (prev == nil) {
views = e->next;
} else {
prev->next = e->next;
}
e->view = nil;
e->next = nil;
delete e;
Unreference();
break;
}
prev = e;
}
}
void Perspective::Update () {
register ViewList* e;
for (e = views; e != nil; e = e->next) {
e->view->Update();
}
}
boolean Perspective::operator == (Perspective& p) {
return
x0 == p.x0 && y0 == p.y0 &&
width == p.width && height == p.height &&
curx == p.curx && cury == p.cury &&
curwidth == p.curwidth && curheight == p.curheight &&
sx == p.sx && sy == p.sy &&
lx == p.lx && ly == p.ly;
}
boolean Perspective::operator != (Perspective& p) {
return
x0 != p.x0 || y0 != p.y0 ||
width != p.width || height != p.height ||
curx != p.curx || cury != p.cury ||
curwidth != p.curwidth || curheight != p.curheight ||
sx != p.sx || sy != p.sy ||
lx != p.lx || ly != p.ly;
}
Perspective& Perspective::operator = (Perspective& p) {
x0 = p.x0;
y0 = p.y0;
width = p.width;
height = p.height;
curx = p.curx;
cury = p.cury;
curwidth = p.curwidth;
curheight = p.curheight;
sx = p.sx;
sy = p.sy;
lx = p.lx;
ly = p.ly;
return *this;
}