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Animation between indices

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This commit is contained in:
Phillip Hsu 2016-08-23 03:07:52 -07:00
parent 98b6c44a47
commit a76fa47768
1 changed files with 54 additions and 21 deletions
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75
app/src/main/java/com/philliphsu/clock2/editalarm/GridSelectorLayout.java
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@ -20,14 +20,19 @@ import android.content.Context;
import android.os.Handler;
import android.util.AttributeSet;
import android.util.Log;
import android.widget.FrameLayout;
import android.view.animation.AlphaAnimation;
import android.view.animation.Animation;
import android.widget.ViewAnimator;
/**
* Created by Phillip Hsu on 8/17/2016.
*
* A derivative of the AOSP datetimepicker RadialPickerLayout class.
* The animations used here are taken from the DatePickerDialog class.
*
* A ViewAnimator is a subclass of FrameLayout.
*/
public class GridSelectorLayout extends FrameLayout implements NumbersGrid.OnNumberSelectedListener {
public class GridSelectorLayout extends ViewAnimator implements NumbersGrid.OnNumberSelectedListener {
private static final String TAG = "GridSelectorLayout";
// Delay before auto-advancing the page, in ms.
@ -35,6 +40,8 @@ public class GridSelectorLayout extends FrameLayout implements NumbersGrid.OnNum
// my own logic, not ported from AOSP timepicker.
public static final int ADVANCE_PAGE_DELAY = 150;
private static final int ANIMATION_DURATION = 300;
private static final int HOUR_INDEX = NumberGridTimePickerDialog.HOUR_INDEX;
private static final int MINUTE_INDEX = NumberGridTimePickerDialog.MINUTE_INDEX;
// TODO: Rename to HALF_DAY_INDEX?
@ -54,12 +61,21 @@ public class GridSelectorLayout extends FrameLayout implements NumbersGrid.OnNum
private MinutesGrid mMinutesGrid;
private final Handler mHandler = new Handler();
private final Animation mInAnimation;
private final Animation mOutAnimation;
public interface OnValueSelectedListener {
void onValueSelected(int pickerIndex, int newValue, boolean autoAdvance);
}
public GridSelectorLayout(Context context, AttributeSet attrs) {
super(context, attrs);
// Taken from AOSP DatePickerDialog class
// TODO: They look terrible on our views. Create new animations.
mInAnimation = new AlphaAnimation(0.0f, 1.0f);
mInAnimation.setDuration(ANIMATION_DURATION);
mOutAnimation = new AlphaAnimation(1.0f, 0.0f);
mOutAnimation.setDuration(ANIMATION_DURATION);
}
// TODO: Why do we need a Context param? RadialPickerLayout does it too.
@ -69,6 +85,10 @@ public class GridSelectorLayout extends FrameLayout implements NumbersGrid.OnNum
return;
}
// *****************************************************************************************
// * TODO: Should we move this block to the Dialog class? This is pretty similar
// * to what AOSP's DatePickerDialog class does. I don't immediately see any
// * code that REALLY needs to be done in this class instead.
mIs24HourMode = is24HourMode;
if (is24HourMode) {
m24HoursGrid = new TwentyFourHoursGrid(context);
@ -81,6 +101,12 @@ public class GridSelectorLayout extends FrameLayout implements NumbersGrid.OnNum
}
mMinutesGrid = new MinutesGrid(context);
mMinutesGrid.initialize(this/*OnNumberSelectedListener*/);
addView(mMinutesGrid);
setInAnimation(mInAnimation);
setOutAnimation(mOutAnimation);
// *****************************************************************************************
// Initialize the currently-selected hour and minute.
setValueForItem(HOUR_INDEX, initialHoursOfDay);
@ -165,11 +191,9 @@ public class GridSelectorLayout extends FrameLayout implements NumbersGrid.OnNum
mCurrentItemShowing = index;
if (index != lastIndex) {
removeViewAt(0); // We could also call removeAllViews(), since we only have one child.
// We already verified that the index is either HOUR_INDEX or MINUTE_INDEX
addView(index == HOUR_INDEX ?
(mIs24HourMode ? m24HoursGrid : mHoursGrid)
: mMinutesGrid);
setInAnimation(animate? mInAnimation : null);
setOutAnimation(animate? mOutAnimation : null);
setDisplayedChild(index);
}
}
@ -182,6 +206,10 @@ public class GridSelectorLayout extends FrameLayout implements NumbersGrid.OnNum
@Override
public void onNumberSelected(int number) {
// Flag set to true if this onNumberSelected() event was caused by
// long clicking in a TwentyFourHoursGrid.
boolean fakeHourItemShowing = false;
if (getCurrentItemShowing() == HOUR_INDEX) {
if (!mIs24HourMode) {
// Change the value before passing it through the callback
@ -192,27 +220,32 @@ public class GridSelectorLayout extends FrameLayout implements NumbersGrid.OnNum
number += 12;
}
} else {
// Check if we would be changing half-days with the new value
// Check if we would be changing half-days with the new value.
// This can happen if this selection occurred with a long click.
if (mCurrentHoursOfDay < 12 && number >= 12 || mCurrentHoursOfDay >= 12 && number < 12) {
int newHalfDay = getIsCurrentlyAmOrPm() == HALF_DAY_1 ? HALF_DAY_2 : HALF_DAY_1;
// Update the half-day toggles states
mListener.onValueSelected(AMPM_INDEX, newHalfDay, false);
// Advance the index prematurely to bypass the animation that would otherwise
// be forced on us if we let the listener autoAdvance us.
setCurrentItemShowing(MINUTE_INDEX, false/*animate?*/);
// We need to "trick" the listener to think we're still on HOUR_INDEX.
// When the listener gets the onValueSelected() callback,
// it needs to call our setCurrentItemShowing() with MINUTE_INDEX a second time,
// so it ends up doing nothing. (Recall that the new index must be different from the
// last index for setCurrentItemShowing() to actually change the current item
// showing.) This has the effect of "tricking" the listener to update its
// own states relevant to the HOUR_INDEX, without having it actually autoAdvance
// and forcing an animation on us.
fakeHourItemShowing = true;
}
}
}
// final int value = number;
// mHandler.postDelayed(new Runnable() {
// @Override
// public void run() {
// mListener.onValueSelected(HOUR_INDEX, value, true);
// }
// }, ADVANCE_PAGE_DELAY);
// mListener.onValueSelected(HOUR_INDEX, value, true);
// } else {
// mListener.onValueSelected(getCurrentItemShowing(), number, false);
// }
setValueForItem(getCurrentItemShowing(), number);
mListener.onValueSelected(getCurrentItemShowing(), number,
final int currentItemShowing = fakeHourItemShowing? HOUR_INDEX : getCurrentItemShowing();
setValueForItem(currentItemShowing, number);
mListener.onValueSelected(currentItemShowing, number,
true/*autoAdvance, not considered for MINUTE_INDEX*/);
}