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/*
This file is part of the KDE games kwin4 program
Copyright (c) 2006 Martin Heni <kde@heni-online.de>
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; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
// Header includes
#include "introsprite.h"
#include "kfourinline_debug.h"
// General includes
#include <cmath>
// KDE includes
#include <KConfig>
#define sign(x) ( (x)>0?1:((x)<0?-1:0) )
/**
* Store an animation script command. The command represents certain possible
* animation sub mentods. The possible methods are listed in the enum Cmd
*/
class AnimationCommand
{
public:
/**
* The supported commands.
*/
enum Cmd {SHOW, HIDE, PAUSE, POSITION, LINEAR_DURATION, CIRCLE_DURATION, MANHATTEN};
/**
* Construct an animation command
*/
AnimationCommand()
{
cmd = PAUSE;
duration = 0;
radius = 0.0;
velocity = 0.0;
}
/** The command type.
*/
Cmd cmd;
/** How long does the command take [ms].
*/
int duration;
/** The start position [0..1, 0..1].
*/
QPointF start;
/** The end position [0..1, 0..1].
*/
QPointF end;
/** The radius [0..1] (if necessary).
*/
double radius;
/** The velocity [0...1000] (if necessary).
*/
double velocity;
};
// Constructor for the sprite
IntroSprite::IntroSprite(const QString &id, ThemeManager* theme, int no, QGraphicsScene* scene)
: Themeable(id, theme), PixmapSprite(no, scene)
{
hide();
mDeltaT = 0;
mDelayT = 0;
mNo = no;
mTime.restart();
mDebugTime.restart();
mStartAnimation = true;
if (theme) theme->updateTheme(this);
}
// Destructor
IntroSprite::~IntroSprite()
{
// Clear animation list (deletes objects)
clearAnimation();
}
// Change the theme
void IntroSprite::changeTheme()
{
PixmapSprite::changeTheme();
}
// Clear the animation script
void IntroSprite::clearAnimation(bool restartTime)
{
qDeleteAll(mAnimList);
mAnimList.clear();
// Reset time?
if (restartTime)
{
mTime.restart();
mDeltaT = 0;
mDelayT = 0;
}
mStartAnimation = true;
}
// Add a show sprite command
AnimationCommand* IntroSprite::addShow()
{
AnimationCommand* cmd = new AnimationCommand();
cmd->cmd = AnimationCommand::SHOW;
cmd->duration = 0;
cmd->start=previousStart();
cmd->end=previousEnd();
mAnimList.append(cmd);
return cmd;
}
// Add a hide sprite command
AnimationCommand* IntroSprite::addHide()
{
AnimationCommand* cmd = new AnimationCommand();
cmd->cmd = AnimationCommand::HIDE;
cmd->duration = 0;
cmd->start=previousStart();
cmd->end=previousEnd();
mAnimList.append(cmd);
return cmd;
}
// Add a relative pause
AnimationCommand* IntroSprite::addPause(int duration)
{
AnimationCommand* cmd = new AnimationCommand();
cmd->cmd = AnimationCommand::PAUSE;
cmd->duration = duration;
cmd->start=previousStart();
cmd->end=previousEnd();
mAnimList.append(cmd);
return cmd;
}
// Add an absoulte pause...wait until the given time
AnimationCommand* IntroSprite::addWait(int duration)
{
int currentDuration = animationDuration();
if (currentDuration < duration)
{
AnimationCommand* cmd = new AnimationCommand();
cmd->cmd = AnimationCommand::PAUSE;
cmd->duration = duration-currentDuration;
cmd->start=previousStart();
cmd->end=previousEnd();
mAnimList.append(cmd);
return cmd;
}
return 0;
}
// Add a set position command
AnimationCommand* IntroSprite::addPosition(QPointF start)
{
AnimationCommand* cmd = new AnimationCommand();
cmd->cmd = AnimationCommand::POSITION;
cmd->duration = 0;
cmd->start=start;
cmd->end=start;
mAnimList.append(cmd);
return cmd;
}
// Add a linear movement
AnimationCommand* IntroSprite::addLinear(QPointF start, QPointF end, int duration)
{
AnimationCommand* cmd = new AnimationCommand();
cmd->cmd = AnimationCommand::LINEAR_DURATION;
cmd->duration = duration;
cmd->start=start;
cmd->end=end;
mAnimList.append(cmd);
return cmd;
}
// Add a relative linear movement, that is, starting from the previous position
AnimationCommand* IntroSprite::addRelativeLinear(QPointF end, int duration)
{
AnimationCommand* cmd = new AnimationCommand();
cmd->cmd = AnimationCommand::LINEAR_DURATION;
cmd->duration = duration;
cmd->start=previousEnd();
cmd->end=end;
mAnimList.append(cmd);
return cmd;
}
// Add a circle movement
AnimationCommand* IntroSprite::addCircle(QPointF start, double radius, int duration)
{
AnimationCommand* cmd = new AnimationCommand();
cmd->cmd = AnimationCommand::CIRCLE_DURATION;
cmd->duration = duration;
cmd->start=start;
cmd->end=start;
cmd->radius=radius;
mAnimList.append(cmd);
return cmd;
}
// Add a relative manhatten move
AnimationCommand* IntroSprite::addRelativeManhatten(QPointF end, double velocity)
{
AnimationCommand* cmd = new AnimationCommand();
cmd->cmd = AnimationCommand::MANHATTEN;
cmd->start = previousEnd();
cmd->end=end;
cmd->velocity=velocity;
qreal dtx = fabs(cmd->end.x()-cmd->start.x())/cmd->velocity*1000.0;
qreal dty = fabs(cmd->end.y()-cmd->start.y())/cmd->velocity*1000.0;
cmd->duration = int(dtx+dty+1.0);
mAnimList.append(cmd);
return cmd;
}
// Retrieve the last commands start position or the current position if none exists
QPointF IntroSprite::previousStart()
{
AnimationCommand* previous = mAnimList.last();
if (previous != 0) return previous->start;
else return QPointF(x()/getScale(), y()/getScale());
}
// Retrieve the last commands end position or the current position if none exists
QPointF IntroSprite::previousEnd()
{
AnimationCommand* previous = mAnimList.last();
if (previous != 0) return previous->end;
return QPointF(x()/getScale(), y()/getScale());
}
// Retrieve the duration of the given animation command
int IntroSprite::duration(AnimationCommand* anim)
{
return anim->duration;
}
// Retrieve the overall duration of the animation
int IntroSprite::animationDuration()
{
int dura = 0;
for (int i=0; i<mAnimList.size(); ++i)
{
dura += mAnimList[i]->duration;
}
return dura;
}
// Globally delay the animation
void IntroSprite::delayAnimation(int duration)
{
mDelayT += duration;
}
// CanvasItem advance method
void IntroSprite::advance(int phase)
{
// Ignore phase 0 (collisions)
if (phase == 0)
{
QGraphicsItem::advance(phase);
return ;
}
// No animation pending
if (mAnimList.isEmpty())
{
QGraphicsItem::advance(phase);
return ;
}
// First time animation start
if (mStartAnimation)
{
mTime.restart();
mStartAnimation = false;
}
int elapsed = mTime.elapsed()+mDeltaT-mDelayT;
if (elapsed<0) elapsed = 0;
// Get the current/first command
AnimationCommand* anim = mAnimList.first();
// Execute commands who were passed in the time since the
// last call
while (anim != 0 && anim->duration <= elapsed)
{
executeCmd(anim, anim->duration);
mAnimList.removeFirst();
elapsed -= anim->duration;
if (!mAnimList.isEmpty()) anim = mAnimList.first();
else anim = 0;
}
// Handle current command
if (anim != 0)
{
executeCmd(anim, elapsed);
}
// Restart timer and store remaining time
mTime.restart();
mDeltaT = elapsed;
mDelayT = 0;
// Parent advance
QGraphicsItem::advance(phase);
}
// Execute the given animation command. The given time is the time elapsed
// since start of the animation sequence.
void IntroSprite::executeCmd(AnimationCommand* anim, int elapsed)
{
if (anim == 0) return;
// Scale
double scale = this->getScale();
// Pause command
if (anim->cmd == AnimationCommand::PAUSE)
{
// Do nothing
}
// Show sprite command
if (anim->cmd == AnimationCommand::SHOW)
{
show();
}
// Hide sprite command
if (anim->cmd == AnimationCommand::HIDE)
{
hide();
}
// Set position command
if (anim->cmd == AnimationCommand::POSITION)
{
qreal x = anim->end.x();
qreal y = anim->end.y();
setPos(x*scale, y*scale);
}
// Linear move command
if (anim->cmd == AnimationCommand::LINEAR_DURATION)
{
double qt = double(elapsed)/double(anim->duration);
qreal x = anim->start.x() + qt*(anim->end.x()-anim->start.x());
qreal y = anim->start.y() + qt*(anim->end.y()-anim->start.y());
setPos(x*scale, y*scale);
}
// Circle move command
if (anim->cmd == AnimationCommand::CIRCLE_DURATION)
{
double qt = double(elapsed)/double(anim->duration);
double sign = 1.0;
if (anim->start.x() > 0.5) sign = -1.0; // Direction of turn
qreal cx = anim->start.x();
qreal cy = anim->start.y();
qreal x = cx + anim->radius*sin(sign*qt*2.0*M_PI);
qreal y = cy-anim->radius + anim->radius*cos(sign*qt*2.0*M_PI);
setPos(x*scale, y*scale);
}
// Manhatten move command
if (anim->cmd == AnimationCommand::MANHATTEN)
{
if ( (fabs(anim->end.x()-x()/scale) <= 0.00001 &&
fabs(anim->end.y()-y()/scale) <= 0.00001 ) ||
(elapsed >= anim->duration) )
{
setPos(anim->end.x()*scale, anim->end.y()*scale);
}
// x-edge
else if (fabs(anim->end.x()-x()/scale) > 0.00001)
{
qreal x = anim->start.x() + sign(anim->end.x()-anim->start.x())*anim->velocity*double(elapsed)/1000.0;
// Finished?
if ( (anim->end.x() > anim->start.x() && x >= anim->end.x()) ||
(anim->end.x() < anim->start.x() && x <= anim->end.x()) )
{
x = anim->end.x();
}
setPos(x*scale, anim->start.y()*scale);
}
// y-edge
else
{
qreal dtx = fabs(anim->end.x()-anim->start.x())/anim->velocity*1000.0;
qreal y = anim->start.y() + sign(anim->end.y()-anim->start.y())*anim->velocity*double(elapsed-dtx)/1000.0;
// Finished?
if ( (anim->end.y() > anim->start.y() && y >= anim->end.y()) ||
(anim->end.y() < anim->start.y() && y <= anim->end.y()) )
{
y = anim->end.y();
}
setPos(anim->end.x()*scale, y*scale);
}
}
}
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