public void reloadTexture(int frontIndex, View frontView, int backIndex, View backView) {
synchronized (this) {
boolean frontChanged =
frontCards.loadView(frontIndex, frontView, controller.getAnimationBitmapFormat());
boolean backChanged =
backCards.loadView(backIndex, backView, controller.getAnimationBitmapFormat());
}
}
synchronized void resetSelection(int selection, int maxIndex) {
// stop flip animation when selection is manually changed
this.maxIndex = maxIndex;
setVisible(false);
setState(STATE_INIT);
accumulatedAngle = selection * 180;
frontCards.resetWithIndex(selection);
backCards.resetWithIndex(selection + 1 < maxIndex ? selection + 1 : -1);
controller.postHideFlipAnimation();
}
synchronized boolean handleTouchEvent(MotionEvent event, boolean isOnTouchEvent) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
// remember page we started on...
lastPageIndex = getPageIndexFromAngle(accumulatedAngle);
lastPosition = orientationVertical ? event.getY() : event.getX();
return isOnTouchEvent;
case MotionEvent.ACTION_MOVE:
float delta =
orientationVertical ? (lastPosition - event.getY()) : (lastPosition - event.getX());
if (Math.abs(delta) > controller.getTouchSlop()) {
setState(STATE_TOUCH);
forward = delta > 0;
}
if (state == STATE_TOUCH) {
if (Math.abs(delta) > minMovement) // ignore small movements
forward = delta > 0;
controller.showFlipAnimation();
float angleDelta;
if (orientationVertical)
angleDelta = 180 * delta / controller.getContentHeight() * movementRate;
else angleDelta = 180 * delta / controller.getContentWidth() * movementRate;
if (Math.abs(angleDelta) > maxTouchMoveAngle) // prevent
// large
// delta
// when
// moving
// too fast
angleDelta = Math.signum(angleDelta) * maxTouchMoveAngle;
// do not flip more than one page with one touch...
if (Math.abs(getPageIndexFromAngle(accumulatedAngle + angleDelta) - lastPageIndex) <= 1) {
accumulatedAngle += angleDelta;
}
// Bounce the page for the first and the last page
if (frontCards.getIndex() == maxIndex - 1) { // the last page
if (accumulatedAngle > frontCards.getIndex() * 180 + maxTipAngle)
accumulatedAngle = frontCards.getIndex() * 180 + maxTipAngle;
} else if (accumulatedAngle < -maxTipAngle) accumulatedAngle = -maxTipAngle;
int anglePageIndex = getPageIndexFromAngle(accumulatedAngle);
if (accumulatedAngle >= 0) {
if (anglePageIndex != frontCards.getIndex()) {
if (anglePageIndex == frontCards.getIndex() - 1) { // moved
// to
// previous
// page
swapCards(); // frontCards becomes the backCards
frontCards.resetWithIndex(backCards.getIndex() - 1);
controller.flippedToView(anglePageIndex, false);
} else if (anglePageIndex == frontCards.getIndex() + 1) { // moved
// to
// next
// page
swapCards();
backCards.resetWithIndex(frontCards.getIndex() + 1);
controller.flippedToView(anglePageIndex, false);
} else
throw new RuntimeException(
String.format(
"Inconsistent states: anglePageIndex: %d, accumulatedAngle %.1f, frontCards %d, backCards %d",
anglePageIndex,
accumulatedAngle,
frontCards.getIndex(),
backCards.getIndex()));
}
}
lastPosition = orientationVertical ? event.getY() : event.getX();
controller.getSurfaceView().requestRender();
return true;
}
return isOnTouchEvent;
case MotionEvent.ACTION_UP:
case MotionEvent.ACTION_CANCEL:
if (state == STATE_TOUCH) {
if (accumulatedAngle < 0) forward = true;
else if (accumulatedAngle > frontCards.getIndex() * 180
&& frontCards.getIndex() == maxIndex - 1) forward = false;
setState(STATE_AUTO_ROTATE);
controller.getSurfaceView().requestRender();
}
return isOnTouchEvent;
}
return false;
}
public synchronized void draw(FlipRenderer renderer, GL10 gl) {
frontCards.buildTexture(renderer, gl);
backCards.buildTexture(renderer, gl);
if (!Texture.isValidTexture(frontCards.getTexture())
&& !Texture.isValidTexture(backCards.getTexture())) return;
if (!visible) return;
switch (state) {
case STATE_INIT:
case STATE_TOUCH:
break;
case STATE_AUTO_ROTATE:
{
animatedFrame++;
float delta = (forward ? acceleration : -acceleration) * animatedFrame % 180;
float oldAngle = accumulatedAngle;
accumulatedAngle += delta;
if (oldAngle < 0) { // bouncing back after flip backward and over
// the first page
Assert.assertTrue(forward);
if (accumulatedAngle >= 0) {
accumulatedAngle = 0;
setState(STATE_INIT);
}
} else {
if (frontCards.getIndex() == maxIndex - 1
&& oldAngle > frontCards.getIndex() * 180) { // bouncing
// back
// after
// flip
// forward
// and
// over
// the
// last
// page
Assert.assertTrue(!forward);
if (accumulatedAngle <= frontCards.getIndex() * 180) {
setState(STATE_INIT);
accumulatedAngle = frontCards.getIndex() * 180;
}
} else {
if (forward) {
Assert.assertTrue(
"index of backCards should not be -1 when automatically flipping forward",
backCards.getIndex() != -1);
if (accumulatedAngle >= backCards.getIndex() * 180) { // moved
// to
// the
// next
// page
accumulatedAngle = backCards.getIndex() * 180;
setState(STATE_INIT);
controller.postFlippedToView(backCards.getIndex());
swapCards();
backCards.resetWithIndex(frontCards.getIndex() + 1);
}
} else { // backward
if (accumulatedAngle <= frontCards.getIndex() * 180) { // firstCards
// restored
accumulatedAngle = frontCards.getIndex() * 180;
setState(STATE_INIT);
}
}
}
} // ends of `if (oldAngle < 0) {} else {}`
if (state == STATE_INIT) controller.postHideFlipAnimation();
else controller.getSurfaceView().requestRender();
}
break;
default:
break;
}
float angle = getDisplayAngle();
if (angle < 0) {
frontCards.getTopCard().setAxis(Card.AXIS_BOTTOM);
frontCards.getTopCard().setAngle(-angle);
frontCards.getTopCard().draw(gl);
frontCards.getBottomCard().setAngle(0);
frontCards.getBottomCard().draw(gl);
// no need to draw backCards here
} else {
if (angle < 90) { // render front view over back view
frontCards.getTopCard().setAngle(0);
frontCards.getTopCard().draw(gl);
backCards.getBottomCard().setAngle(0);
backCards.getBottomCard().draw(gl);
frontCards.getBottomCard().setAxis(Card.AXIS_TOP);
frontCards.getBottomCard().setAngle(angle);
frontCards.getBottomCard().draw(gl);
} else { // render back view first
frontCards.getTopCard().setAngle(0);
frontCards.getTopCard().draw(gl);
backCards.getTopCard().setAxis(Card.AXIS_BOTTOM);
backCards.getTopCard().setAngle(180 - angle);
backCards.getTopCard().draw(gl);
backCards.getBottomCard().setAngle(0);
backCards.getBottomCard().draw(gl);
}
}
}
