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/*
* Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores
* CA 94065 USA or visit www.oracle.com if you need additional information or
* have any questions.
*/
package com.codename1.charts.transitions;
import com.codename1.charts.ChartComponent;
import com.codename1.ui.Graphics;
import com.codename1.ui.animations.Animation;
import com.codename1.ui.animations.Motion;
/**
* A base class for series transitions of ChartComponent. This should be
* overridden by concrete classes that implement the update(int) method
* to update the chart's model and renderer appropriately. This class can serve
* as a buffer for changes to the model so that they don't affect the ChartComponent
* immediately. Changes can either be eased in using animateChart() or updated
* in one shot using updateChart().
* @author shannah
*/
public abstract class SeriesTransition implements Animation {
public static final int EASING_LINEAR=1;
public static final int EASING_IN=2;
public static final int EASING_OUT=3;
public static final int EASING_IN_OUT=4;
/**
* The chart to be animated.
*/
private ChartComponent chart;
/**
* The duration of the transition (in ms).
*/
private int duration;
/**
* Motion that will be used to perform the transition.
*/
private Motion motion;
/**
* The type of easing that should be used for the transition.
*/
private int easing = EASING_LINEAR;
/**
* Flag to indicate that the animation is finished.
*/
private boolean finished;
public SeriesTransition(ChartComponent chart){
this(chart, EASING_LINEAR, 200);
}
public SeriesTransition(ChartComponent chart, int easing){
this(chart, easing, 200);
}
public SeriesTransition(ChartComponent chart, int easing, int duration){
this.chart = chart;
this.easing = easing;
this.duration = duration;
}
/**
* Initializes the transition for another iteration. This can be overridden
* by subclasses to provide their own initialization. This method
* will be called just prior to the transition taking place.
* IMPORTANT: Subclasses must make sure to call super.initTransition()
* so that the animation will be initialized properly.
*/
protected void initTransition(){
finished = false;
switch (getEasing()){
case EASING_LINEAR:
motion = Motion.createLinearMotion(0, 100, getDuration());
break;
case EASING_IN:
motion = Motion.createEaseInMotion(0, 100, getDuration());
break;
case EASING_OUT:
motion = Motion.createEaseOutMotion(0, 100, getDuration());
break;
case EASING_IN_OUT:
motion = Motion.createEaseInOutMotion(0, 100, getDuration());
break;
}
motion.start();
}
/**
* Cleans up any settings in the transition. Called after a transition
* is complete. This is meant to be overridden by subclasses.
*/
protected void cleanup(){
}
/**
* Updates the renderer and model at the specified progress position of
* the animation. Meant to be overridden by subclasses.
* @param progress The progress of the animation (between 0 and 100).
*/
protected abstract void update(int progress);
public boolean animate() {
if (finished){
cleanup();
chart.getComponentForm().deregisterAnimated(this);
return false;
} else if (motion.isFinished()){
finished = true;
}
update(motion.getValue());
return true;
}
public void paint(Graphics g) {
getChart().repaint();
}
/**
* Gets the ChartComponent that is the subject of the transition.
* @return the chart
*/
public ChartComponent getChart() {
return chart;
}
/**
* Sets the ChartComponent that is the subject of the transition.
* @param chart the chart to set
*/
public void setChart(ChartComponent chart) {
this.chart = chart;
}
/**
* Gets the duration of the transition. (in milliseconds)
* @return the duration
*/
public int getDuration() {
return duration;
}
/**
* Sets the duration of the transition in milliseconds.
* @param duration the duration to set
*/
public void setDuration(int duration) {
this.duration = duration;
}
/**
* Gets the type of easing used in the transition. Should be one of
* EASING_LINEAR, EASING_IN, EASING_OUT, or EASING_IN_OUT.
* @return the easing
*/
public int getEasing() {
return easing;
}
/**
* Sets the type of easing used in the transition. Should be one of
* EASING_LINEAR, EASING_IN, EASING_OUT, or EASING_IN_OUT.
* @param easing the easing to set
*/
public void setEasing(int easing) {
this.easing = easing;
}
/**
* Applies all pending changes to the chart model and renderer using the
* current animation settings.
*/
public void animateChart(){
initTransition();
chart.getComponentForm().registerAnimated(this);
}
/**
* Applies all pending changes to the chart model and renderer and repaints
* the chart. This is basically like calling animateChart() with a duration
* of 0.
*/
public void updateChart(){
chart.repaint();
}
}
