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/*
* Copyright (c) 2012, Codename One 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. Codename One 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 Codename One through http://www.codenameone.com/ if you
* need additional information or have any questions.
*/
package com.codename1.ui.animations;
import com.codename1.ui.AnimationManager;
import com.codename1.ui.Container;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.Set;
/**
* Parent class representing an animation object within the AnimationManager queue.
*
* @author Shai Almog
*/
public abstract class ComponentAnimation {
private Object notifyLock;
private Runnable onCompletion;
private int step = -1;
private ArrayList post;
private boolean completed = false;
/**
* Invokes the runnable just as the animation finishes thus allowing cleanup of the UI for the upcoming
* animations, this is useful when running a complex sequence
* @param r the runnable to call when the animation is done
*/
public void addOnCompleteCall(Runnable r) {
if(post == null) {
post = new ArrayList();
}
post.add(r);
}
/**
* Step mode allows stepping thru an animation one frame at a time, e.g. when scrolling down an animation
* might change title elements then change them back as we scroll up.
* @return true if this animation can be stepped in which case the setStep etc. methods should work.
*/
public boolean isStepModeSupported() {
return false;
}
/**
* Sets the current animation step to a value between 0 and maxSteps
* @param step the current step
*/
public void setStep(int step) {
this.step = step;
}
public int getStep() {
return step;
}
/**
* The total number of steps in this animation.
* @return the number of steps
*/
public int getMaxSteps() {
return 100;
}
/**
* Indicates if the animation is in progress
* @return true if in progress
*/
public abstract boolean isInProgress();
/**
* Updates the animation state
*/
protected abstract void updateState();
/**
* Invoked by the animation manager internally
*/
public final void updateAnimationState() {
updateState();
if(!isInProgress()) {
if (!completed) {
completed = true;
if(notifyLock != null) {
synchronized(notifyLock) {
notifyLock.notify();
}
}
if(onCompletion != null) {
onCompletion.run();
}
if(post != null) {
for(Runnable p : post) {
p.run();
}
}
}
}
else { //ensure completed would be set to false if animation has been restarted
completed = false;
}
}
/**
* Flushes the animation immediately, this will be called if the form is de-initialized
*/
public void flush() {
}
/**
* This method is used internally by the addAnimationAndBlock method of AnimationManager and shouldn't
* be used outside of that.
* @param l the lock object
*/
public final void setNotifyLock(Object l) {
if(notifyLock != null) {
throw new RuntimeException("setNotifyLock shouldn't be invoked more than once");
}
this.notifyLock = l;
}
/**
* This method is used internally by the addAnimation method of AnimationManager and shouldn't
* be used outside of that.
* @param r the callback
*/
public final void setOnCompletion(Runnable r) {
if(onCompletion != null) {
throw new RuntimeException("setOnCompletion shouldn't be invoked more than once");
}
this.onCompletion = r;
}
/**
* Allows us to create an animation that compounds several separate animations so they appear as a
* single animation to the system and process in parallel
* @param anims the animations
* @return the compounded animation
*/
public static ComponentAnimation compoundAnimation(ComponentAnimation... anims) {
return new CompoundAnimation(anims);
}
/**
* Allows us to create an animation that places several separate animations in a sequence so they appear as a
* single animation to the system and process one after the other
* @param anims the animations
* @return the sequential animation
*/
public static ComponentAnimation sequentialAnimation(ComponentAnimation... anims) {
return new CompoundAnimation(anims, true);
}
static class CompoundAnimation extends ComponentAnimation {
ComponentAnimation[] anims;
int sequence;
public CompoundAnimation(ComponentAnimation[] anims) {
this.anims = anims;
sequence = -1;
}
public CompoundAnimation(ComponentAnimation[] anims, boolean s) {
this.anims = anims;
sequence = 0;
}
@Override
public boolean isInProgress() {
if(sequence > -1 && sequence < anims.length) {
if(anims[sequence].isInProgress()) {
return true;
}
while(anims.length > sequence) {
if(anims[sequence].isInProgress()) {
return true;
}
sequence++;
}
return false;
}
for(ComponentAnimation a : anims) {
if(a.isInProgress()) {
return true;
}
}
return false;
}
@Override
protected void updateState() {
if(sequence > -1) {
anims[Math.min(sequence, anims.length - 1)].updateState();
return;
}
for(ComponentAnimation a : anims) {
a.updateAnimationState();
}
}
@Override
public void flush() {
for(ComponentAnimation a : anims) {
a.flush();
}
}
@Override
public int getMaxSteps() {
if (sequence > -1) {
int out = 0;
for (ComponentAnimation a : anims) {
out += a.getMaxSteps();
}
return out;
} else {
int out = 0;
for (ComponentAnimation a : anims) {
out = Math.max(a.getMaxSteps(), out);
}
return out;
}
}
@Override
public void setStep(int step) {
super.setStep(step);
if (sequence > -1) {
int animIdx = 0;
int len = anims.length;
while (animIdx < anims.length && anims[animIdx].getMaxSteps() <= step) {
ComponentAnimation anim = anims[animIdx];
anim.setStep(anim.getMaxSteps());
step -= anim.getMaxSteps();
animIdx++;
}
while (animIdx < len) {
anims[animIdx].setStep(0);
animIdx++;
}
} else {
for (ComponentAnimation anim : anims) {
anim.setStep(Math.min(anim.getMaxSteps(), step));
}
}
}
}
/**
* A special kind of ComponentAnimation that encapsulates a mutation of the
* user interface. This class used internally to allow compatible UI mutation
* animations to run concurrently. Two UI mutations are compatible if the containers
* that they mutate reside in separate branches of the UI tree. I.e. As long as neither
* container contains the other, their mutations are compatible.
*
* @since 7.0
* @see AnimationManager#addUIMutation(com.codename1.ui.Container, com.codename1.ui.animations.ComponentAnimation)
* @see AnimationManager#addUIMutation(com.codename1.ui.Container, com.codename1.ui.animations.ComponentAnimation, java.lang.Runnable)
*/
public static class UIMutation extends CompoundAnimation {
/**
* Containers that are being mutated as a part of this animation.
*/
private Set containers = new HashSet();
/**
* A flag that is set the first time updateState() is called. Once this
* flag is set, the UIMutation will not accept any more mutations.
*/
private boolean isStarted;
/**
* Creates a new UIMutation which mutates the given container with the provided
* animation.
* @param cnt The container that is being mutated.
* @param anim The animation.
*/
public UIMutation(Container cnt, ComponentAnimation anim) {
super(new ComponentAnimation[]{anim});
}
/**
* Tries to add another mutation to this UIMutation.
*
* @param cnt The container that is being mutated.
* @param anim The animation
* @return True if it was successfully added. False otherwise. This will return false if
* {@link #isLocked() } returns true (i.e. the animation has already stared), or if the mutation
* is incompatible with any of the existing mutations in this mutation.
*/
public boolean add(Container cnt, ComponentAnimation anim) {
if (isStarted) {
return false;
}
for (Container existing : containers) {
if (cnt == existing || existing.contains(cnt) || cnt.contains(existing)) {
return false;
}
}
ComponentAnimation[] newAnims = new ComponentAnimation[anims.length+1];
System.arraycopy(anims, 0, newAnims, 0, anims.length);
newAnims[anims.length] = anim;
anims = newAnims;
containers.add(cnt);
return true;
}
/**
* Checks if this mutation is locked. Once a mutation animation has started,
* it becomes locked, and cannot have any further mutations added to it.
* @return
*/
public boolean isLocked() {
return isStarted;
}
@Override
protected void updateState() {
isStarted = true;
super.updateState();
}
}
}
