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-> Fixing some layout issues in StackView

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-> Made the highlight width depend on the screen density

Change-Id: I6b3ae68de5fb90728938a7e0869cf97e816aa6af
This commit is contained in:
Adam Cohen
2010-09-10 14:38:40 -07:00
parent f22c30cd81
commit dfcdddd7c4
2 changed files with 58 additions and 29 deletions
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15
core/java/android/widget/AdapterViewAnimator.java
View File

@@ -42,7 +42,7 @@ import android.view.animation.AnimationUtils;
* @attr ref android.R.styleable#AdapterViewAnimator_animateFirstView
*/
public abstract class AdapterViewAnimator extends AdapterView<Adapter>
implements RemoteViewsAdapter.RemoteAdapterConnectionCallback{
implements RemoteViewsAdapter.RemoteAdapterConnectionCallback {
private static final String TAG = "RemoteViewAnimator";
/**
@@ -358,6 +358,17 @@ public abstract class AdapterViewAnimator extends AdapterView<Adapter>
}
}
/**
* This method can be overridden so that subclasses can provide a custom frame in which their
* children can live. For example, StackView adds padding to its childrens' frames so as to
* accomodate for the highlight effect.
*
* @return The FrameLayout into which children can be placed.
*/
FrameLayout getFrameForChild() {
return new FrameLayout(mContext);
}
void showOnly(int childIndex, boolean animate, boolean onLayout) {
if (mAdapter == null) return;
@@ -436,7 +447,7 @@ public abstract class AdapterViewAnimator extends AdapterView<Adapter>
// We wrap the new view in a FrameLayout so as to respect the contract
// with the adapter, that is, that we don't modify this view directly
FrameLayout fl = new FrameLayout(mContext);
FrameLayout fl = getFrameForChild();
// If the view from the adapter is null, we still keep an empty frame in place
if (newView != null) {

72
core/java/android/widget/StackView.java
View File

@@ -19,6 +19,7 @@ package android.widget;
import android.animation.PropertyValuesHolder;
import android.animation.ObjectAnimator;
import android.content.Context;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.BlurMaskFilter;
import android.graphics.Canvas;
@@ -30,6 +31,7 @@ import android.graphics.Rect;
import android.graphics.RectF;
import android.graphics.TableMaskFilter;
import android.util.AttributeSet;
import android.util.DisplayMetrics;
import android.util.Log;
import android.view.MotionEvent;
import android.view.VelocityTracker;
@@ -93,6 +95,7 @@ public class StackView extends AdapterViewAnimator {
*/
private static final int NUM_ACTIVE_VIEWS = 5;
private static final int FRAME_PADDING = 4;
/**
* These variables are all related to the current state of touch interaction
@@ -103,7 +106,7 @@ public class StackView extends AdapterViewAnimator {
private int mActivePointerId;
private int mYVelocity = 0;
private int mSwipeGestureType = GESTURE_NONE;
private int mViewHeight;
private int mSlideAmount;
private int mSwipeThreshold;
private int mTouchSlop;
private int mMaximumVelocity;
@@ -116,6 +119,7 @@ public class StackView extends AdapterViewAnimator {
private ViewGroup mAncestorContainingAllChildren = null;
private int mAncestorHeight = 0;
private int mStackMode;
private int mFramePadding;
public StackView(Context context) {
super(context);
@@ -141,7 +145,7 @@ public class StackView extends AdapterViewAnimator {
mStackSlider = new StackSlider();
if (sHolographicHelper == null) {
sHolographicHelper = new HolographicHelper();
sHolographicHelper = new HolographicHelper(mContext);
}
setClipChildren(false);
setClipToPadding(false);
@@ -153,6 +157,11 @@ public class StackView extends AdapterViewAnimator {
// This is a flag to indicate the the stack is loading for the first time
mWhichChild = -1;
// Adjust the frame padding based on the density, since the highlight changes based
// on the density
final float density = mContext.getResources().getDisplayMetrics().density;
mFramePadding = (int) Math.ceil(density * FRAME_PADDING);
}
/**
@@ -205,7 +214,7 @@ public class StackView extends AdapterViewAnimator {
view.setAlpha(0.0f);
view.setVisibility(INVISIBLE);
LayoutParams lp = (LayoutParams) view.getLayoutParams();
lp.setVerticalOffset(-mViewHeight);
lp.setVerticalOffset(-mSlideAmount);
} else if (toIndex == -1) {
// Fade item out
ObjectAnimator<Float> fadeOut = new ObjectAnimator<Float>
@@ -220,7 +229,7 @@ public class StackView extends AdapterViewAnimator {
}
private void transformViewAtIndex(int index, View view) {
float maxPerpectiveShift = mViewHeight * PERSPECTIVE_SHIFT_FACTOR;
float maxPerpectiveShift = mMeasuredHeight * PERSPECTIVE_SHIFT_FACTOR;
if (index == mNumActiveViews -1) index--;
@@ -233,8 +242,10 @@ public class StackView extends AdapterViewAnimator {
r = (float) Math.pow(r, 2);
int stackDirection = (mStackMode == ITEMS_SLIDE_UP) ? 1 : -1;
float transY = -stackDirection * r * maxPerpectiveShift +
stackDirection * (1 - scale) * (mViewHeight / 2.0f);
float perspectiveTranslation = -stackDirection * r * maxPerpectiveShift;
float scaleShiftCorrection = stackDirection * (1 - scale) *
(mMeasuredHeight * (1 - PERSPECTIVE_SHIFT_FACTOR) / 2.0f);
float transY = perspectiveTranslation + scaleShiftCorrection;
PropertyValuesHolder<Float> translationY =
new PropertyValuesHolder<Float>("translationY", transY);
@@ -251,6 +262,13 @@ public class StackView extends AdapterViewAnimator {
}
}
@Override
FrameLayout getFrameForChild() {
FrameLayout fl = new FrameLayout(mContext);
fl.setPadding(mFramePadding, mFramePadding, mFramePadding, mFramePadding);
return fl;
}
/**
* Apply any necessary tranforms for the child that is being added.
*/
@@ -282,9 +300,9 @@ public class StackView extends AdapterViewAnimator {
private void onLayout() {
if (!mFirstLayoutHappened) {
mViewHeight = Math.round(SLIDE_UP_RATIO * getMeasuredHeight());
mSlideAmount = Math.round(SLIDE_UP_RATIO * getMeasuredHeight());
updateChildTransforms();
mSwipeThreshold = Math.round(SWIPE_THRESHOLD_RATIO * mViewHeight);
mSwipeThreshold = Math.round(SWIPE_THRESHOLD_RATIO * mSlideAmount);
mFirstLayoutHappened = true;
}
}
@@ -395,15 +413,15 @@ public class StackView extends AdapterViewAnimator {
case MotionEvent.ACTION_MOVE: {
beginGestureIfNeeded(deltaY);
float rx = deltaX / (mViewHeight * 1.0f);
float rx = deltaX / (mSlideAmount * 1.0f);
if (mSwipeGestureType == GESTURE_SLIDE_DOWN) {
float r = (deltaY - mTouchSlop * 1.0f) / mViewHeight * 1.0f;
float r = (deltaY - mTouchSlop * 1.0f) / mSlideAmount * 1.0f;
if (mStackMode == ITEMS_SLIDE_DOWN) r = 1 - r;
mStackSlider.setYProgress(1 - r);
mStackSlider.setXProgress(rx);
return true;
} else if (mSwipeGestureType == GESTURE_SLIDE_UP) {
float r = -(deltaY + mTouchSlop * 1.0f) / mViewHeight * 1.0f;
float r = -(deltaY + mTouchSlop * 1.0f) / mSlideAmount * 1.0f;
if (mStackMode == ITEMS_SLIDE_DOWN) r = 1 - r;
mStackSlider.setYProgress(r);
mStackSlider.setXProgress(rx);
@@ -620,8 +638,8 @@ public class StackView extends AdapterViewAnimator {
switch (mMode) {
case NORMAL_MODE:
viewLp.setVerticalOffset(Math.round(-r * stackDirection * mViewHeight));
highlightLp.setVerticalOffset(Math.round(-r * stackDirection * mViewHeight));
viewLp.setVerticalOffset(Math.round(-r * stackDirection * mSlideAmount));
highlightLp.setVerticalOffset(Math.round(-r * stackDirection * mSlideAmount));
mHighlight.setAlpha(highlightAlphaInterpolator(r));
float alpha = viewAlphaInterpolator(1 - r);
@@ -641,14 +659,14 @@ public class StackView extends AdapterViewAnimator {
break;
case BEGINNING_OF_STACK_MODE:
r = r * 0.2f;
viewLp.setVerticalOffset(Math.round(-stackDirection * r * mViewHeight));
highlightLp.setVerticalOffset(Math.round(-stackDirection * r * mViewHeight));
viewLp.setVerticalOffset(Math.round(-stackDirection * r * mSlideAmount));
highlightLp.setVerticalOffset(Math.round(-stackDirection * r * mSlideAmount));
mHighlight.setAlpha(highlightAlphaInterpolator(r));
break;
case END_OF_STACK_MODE:
r = (1-r) * 0.2f;
viewLp.setVerticalOffset(Math.round(stackDirection * r * mViewHeight));
highlightLp.setVerticalOffset(Math.round(stackDirection * r * mViewHeight));
viewLp.setVerticalOffset(Math.round(stackDirection * r * mSlideAmount));
highlightLp.setVerticalOffset(Math.round(stackDirection * r * mSlideAmount));
mHighlight.setAlpha(highlightAlphaInterpolator(r));
break;
}
@@ -665,8 +683,8 @@ public class StackView extends AdapterViewAnimator {
final LayoutParams highlightLp = (LayoutParams) mHighlight.getLayoutParams();
r *= 0.2f;
viewLp.setHorizontalOffset(Math.round(r * mViewHeight));
highlightLp.setHorizontalOffset(Math.round(r * mViewHeight));
viewLp.setHorizontalOffset(Math.round(r * mSlideAmount));
highlightLp.setHorizontalOffset(Math.round(r * mSlideAmount));
}
void setMode(int mode) {
@@ -695,8 +713,8 @@ public class StackView extends AdapterViewAnimator {
float d = (float) Math.sqrt(Math.pow(viewLp.horizontalOffset, 2) +
Math.pow(viewLp.verticalOffset, 2));
float maxd = (float) Math.sqrt(Math.pow(mViewHeight, 2) +
Math.pow(0.4f * mViewHeight, 2));
float maxd = (float) Math.sqrt(Math.pow(mSlideAmount, 2) +
Math.pow(0.4f * mSlideAmount, 2));
if (velocity == 0) {
return (invert ? (1 - d / maxd) : d / maxd) * DEFAULT_ANIMATION_DURATION;
@@ -940,17 +958,19 @@ public class StackView extends AdapterViewAnimator {
private final Paint mErasePaint = new Paint();
private final Paint mBlurPaint = new Paint();
HolographicHelper() {
initializePaints();
HolographicHelper(Context context) {
initializePaints(context);
}
void initializePaints() {
void initializePaints(Context context) {
final float density = context.getResources().getDisplayMetrics().density;
mHolographicPaint.setColor(0xff6699ff);
mHolographicPaint.setFilterBitmap(true);
mHolographicPaint.setMaskFilter(TableMaskFilter.CreateClipTable(0, 30));
mErasePaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_OUT));
mErasePaint.setFilterBitmap(true);
mBlurPaint.setMaskFilter(new BlurMaskFilter(2, BlurMaskFilter.Blur.NORMAL));
mBlurPaint.setMaskFilter(new BlurMaskFilter(2*density, BlurMaskFilter.Blur.NORMAL));
}
Bitmap createOutline(View v) {
@@ -968,12 +988,10 @@ public class StackView extends AdapterViewAnimator {
v.setRotationX(0);
v.setRotation(0);
v.setTranslationY(0);
canvas.concat(v.getMatrix());
v.draw(canvas);
v.setRotationX(rotationX);
v.setRotation(rotation);
v.setTranslationY(translationY);
canvas.setMatrix(id);
drawOutline(canvas, bitmap);
return bitmap;