Aminet 30/Aminet 30 (1999)(Schatztruhe)[!][Apr 1999].iso/Aminet/dev/c/flash-0.4.3.lha/flash-0.4.3/Lib/displaylist.cc

C/C++ Source or Header | 1999-02-21 | 4.4 KB | 240 lines

////////////////////////////////////////////////////////////
// Flash Plugin and Player
// Copyright (C) 1998,1999 Olivier Debon
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
//
///////////////////////////////////////////////////////////////
//  Author : Olivier Debon  <[e-mail]>
//

#include <stdio.h>
#include <assert.h>

static char *rcsid = "$Id: displaylist.cc,v 1.7 1999/02/02 18:45:05 olivier Exp $";

#include "displaylist.h"
#include "graphic.h"
#include "character.h"

#define PRINT 0

DisplayList::DisplayList()
{
    list = 0;
    bg = 0;
}

DisplayList::~DisplayList()
{
    clearList();
}

void
DisplayList::clearList()
{
    DisplayListEntry *del, *e;

    for(e = list; e;)
    {
        del = e;
        e = e->next;
        delete del;
    }
    list = 0;
}

DisplayListEntry *
DisplayList::getList()
{
    return list;
}

void
DisplayList::placeObject(Character *character, long depth, Matrix *matrix, Cxform *cxform)
{
    DisplayListEntry *n,*e,*prev;

    n = new DisplayListEntry;
    n->depth = depth;
    n->matrix = matrix;
    n->cxform = cxform;
    n->character = character;

    if (character == 0 || matrix == 0 || cxform == 0) {
        for (e = list; e; prev = e, e = e->next) {
            if (e->depth == n->depth) {
                if (character == 0) {
                    n->character = e->character;
                }
                if (matrix == 0) {
                    n->matrix = e->matrix;
                }
                if (cxform == 0) {
                    n->cxform = e->cxform;
                }
                break;
            }
        }
    }

    if (n->character == 0) {
        // Not found !!!    Should not happen
        printf("PlaceObject cannot find character at depth %d\n", n->depth);
        delete n;
        return;
    }

    prev = 0;
    for (e = list; e; prev = e, e = e->next)
    {
        if (e->depth == n->depth) {
            // Replace object
            if (prev) {
                prev->next = e->next;
                delete e;
                e = prev->next;
            } else {
                list = e->next;
                delete e;
                e = list;
            }
            if (e) {
                // Should break then
                assert(e->depth > n->depth);
            } else {
                break;
            }
        }
        if (e->depth > n->depth) break;
    }
    if (prev == 0) {
        // Object comes at first place
        n->next = list;
        list = n;
    } else {
        // Insert object
        n->next = prev->next;
        prev->next = n;
    }
}

Character *
DisplayList::removeObject(Character *character, long depth)
{
    DisplayListEntry *e,*prev;

    // List should not be empty
    if (list == 0) return 0;

    prev = 0;
    for (e = list; e; prev = e, e = e->next)
    {
        if (e->depth == depth) {
             if (prev) {
                prev->next = e->next;
            } else {
                list = e->next;
            }
            if (character == 0) {
                character = e->character;
            }
            delete e;
            return character;
        }
    }
    return 0;    // Should not happen
}

Character *
DisplayList::removeObject(long depth)
{
    return removeObject((Character *)0,depth);
}

ActionRecord *
DisplayList::processEvent(GraphicDevice *gd, FlashEvent *event)
{
    DisplayListEntry *e;
    ActionRecord     *action = 0;

    for (e = list; e; e = e->next)
    {
        if (e->character) {
            if (e->character->hasEventHandler()){
                action = e->character->eventHandler(gd, event);
                if (action) {
                    break;
                }
            }
        }
    }

    return action;
}

void
DisplayList::setBackgroundColor(Color *color)
{
    bg = color;
}

int
DisplayList::render(GraphicDevice *gd, Matrix *m)
{
    DisplayListEntry *e;
    int sprite = 0;
    long n = 0;

    if (bg) {
        gd->setBackgroundColor(*bg);
        bg = 0;
    }

    for (e = list; e; e = e->next)
    {
#if PRINT
        printf("Character %3d @ %3d\n", e->character ? e->character->getTagId() : 0, e->depth);
#endif
        if (e->character) {
            Matrix mat;

            if (m) {
                mat = *m;
            }

            if (e->matrix) {
                mat = mat * (*e->matrix);
            }

            if (e->character->hasEventHandler()) {
                long hitTestId;

                hitTestId = gd->registerHitTest(e->character->getTagId());
                if (hitTestId) {
                    e->character->getRegion(gd, &mat, hitTestId);
                }
            }

            if (e->character->execute(gd, &mat, e->cxform)) {
                sprite = 1;
            }

            n++;
        }
    }
    return sprite;
}