/*
* Copyright (C) 2009 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.internal.widget;
import android.content.Context;
import android.content.res.Resources;
import android.content.res.TypedArray;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.media.AudioAttributes;
import android.os.UserHandle;
import android.os.Vibrator;
import android.provider.Settings;
import android.util.AttributeSet;
import android.util.Log;
import android.view.Gravity;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.AlphaAnimation;
import android.view.animation.Animation;
import android.view.animation.LinearInterpolator;
import android.view.animation.TranslateAnimation;
import android.view.animation.Animation.AnimationListener;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.ImageView.ScaleType;
import com.android.internal.R;
/**
* A special widget containing two Sliders and a threshold for each. Moving either slider beyond
* the threshold will cause the registered OnTriggerListener.onTrigger() to be called with
* whichHandle being {@link OnTriggerListener#LEFT_HANDLE} or {@link OnTriggerListener#RIGHT_HANDLE}
* Equivalently, selecting a tab will result in a call to
* {@link OnTriggerListener#onGrabbedStateChange(View, int)} with one of these two states. Releasing
* the tab will result in whichHandle being {@link OnTriggerListener#NO_HANDLE}.
*
*/
public class SlidingTab extends ViewGroup {
private static final String LOG_TAG = "SlidingTab";
private static final boolean DBG = false;
private static final int HORIZONTAL = 0; // as defined in attrs.xml
private static final int VERTICAL = 1;
// TODO: Make these configurable
private static final float THRESHOLD = 2.0f / 3.0f;
private static final long VIBRATE_SHORT = 30;
private static final long VIBRATE_LONG = 40;
private static final int TRACKING_MARGIN = 50;
private static final int ANIM_DURATION = 250; // Time for most animations (in ms)
private static final int ANIM_TARGET_TIME = 500; // Time to show targets (in ms)
private boolean mHoldLeftOnTransition = true;
private boolean mHoldRightOnTransition = true;
private static final AudioAttributes VIBRATION_ATTRIBUTES = new AudioAttributes.Builder()
.setContentType(AudioAttributes.CONTENT_TYPE_SONIFICATION)
.setUsage(AudioAttributes.USAGE_ASSISTANCE_SONIFICATION)
.build();
private OnTriggerListener mOnTriggerListener;
private int mGrabbedState = OnTriggerListener.NO_HANDLE;
private boolean mTriggered = false;
private Vibrator mVibrator;
private final float mDensity; // used to scale dimensions for bitmaps.
/**
* Either {@link #HORIZONTAL} or {@link #VERTICAL}.
*/
private final int mOrientation;
private final Slider mLeftSlider;
private final Slider mRightSlider;
private Slider mCurrentSlider;
private boolean mTracking;
private float mThreshold;
private Slider mOtherSlider;
private boolean mAnimating;
private final Rect mTmpRect;
/**
* Listener used to reset the view when the current animation completes.
*/
private final AnimationListener mAnimationDoneListener = new AnimationListener() {
public void onAnimationStart(Animation animation) {
}
public void onAnimationRepeat(Animation animation) {
}
public void onAnimationEnd(Animation animation) {
onAnimationDone();
}
};
/**
* Interface definition for a callback to be invoked when a tab is triggered
* by moving it beyond a threshold.
*/
public interface OnTriggerListener {
/**
* The interface was triggered because the user let go of the handle without reaching the
* threshold.
*/
public static final int NO_HANDLE = 0;
/**
* The interface was triggered because the user grabbed the left handle and moved it past
* the threshold.
*/
public static final int LEFT_HANDLE = 1;
/**
* The interface was triggered because the user grabbed the right handle and moved it past
* the threshold.
*/
public static final int RIGHT_HANDLE = 2;
/**
* Called when the user moves a handle beyond the threshold.
*
* @param v The view that was triggered.
* @param whichHandle Which "dial handle" the user grabbed,
* either {@link #LEFT_HANDLE}, {@link #RIGHT_HANDLE}.
*/
void onTrigger(View v, int whichHandle);
/**
* Called when the "grabbed state" changes (i.e. when the user either grabs or releases
* one of the handles.)
*
* @param v the view that was triggered
* @param grabbedState the new state: {@link #NO_HANDLE}, {@link #LEFT_HANDLE},
* or {@link #RIGHT_HANDLE}.
*/
void onGrabbedStateChange(View v, int grabbedState);
}
/**
* Simple container class for all things pertinent to a slider.
* A slider consists of 3 Views:
*
* {@link #tab} is the tab shown on the screen in the default state.
* {@link #text} is the view revealed as the user slides the tab out.
* {@link #target} is the target the user must drag the slider past to trigger the slider.
*
*/
private static class Slider {
/**
* Tab alignment - determines which side the tab should be drawn on
*/
public static final int ALIGN_LEFT = 0;
public static final int ALIGN_RIGHT = 1;
public static final int ALIGN_TOP = 2;
public static final int ALIGN_BOTTOM = 3;
public static final int ALIGN_UNKNOWN = 4;
/**
* States for the view.
*/
private static final int STATE_NORMAL = 0;
private static final int STATE_PRESSED = 1;
private static final int STATE_ACTIVE = 2;
private final ImageView tab;
private final TextView text;
private final ImageView target;
private int currentState = STATE_NORMAL;
private int alignment = ALIGN_UNKNOWN;
private int alignment_value;
/**
* Constructor
*
* @param parent the container view of this one
* @param tabId drawable for the tab
* @param barId drawable for the bar
* @param targetId drawable for the target
*/
Slider(ViewGroup parent, int tabId, int barId, int targetId) {
// Create tab
tab = new ImageView(parent.getContext());
tab.setBackgroundResource(tabId);
tab.setScaleType(ScaleType.CENTER);
tab.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT,
LayoutParams.WRAP_CONTENT));
// Create hint TextView
text = new TextView(parent.getContext());
text.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT,
LayoutParams.MATCH_PARENT));
text.setBackgroundResource(barId);
text.setTextAppearance(parent.getContext(), R.style.TextAppearance_SlidingTabNormal);
// hint.setSingleLine(); // Hmm.. this causes the text to disappear off-screen
// Create target
target = new ImageView(parent.getContext());
target.setImageResource(targetId);
target.setScaleType(ScaleType.CENTER);
target.setLayoutParams(
new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
target.setVisibility(View.INVISIBLE);
parent.addView(target); // this needs to be first - relies on painter's algorithm
parent.addView(tab);
parent.addView(text);
}
void setIcon(int iconId) {
tab.setImageResource(iconId);
}
void setTabBackgroundResource(int tabId) {
tab.setBackgroundResource(tabId);
}
void setBarBackgroundResource(int barId) {
text.setBackgroundResource(barId);
}
void setHintText(int resId) {
text.setText(resId);
}
void hide() {
boolean horiz = alignment == ALIGN_LEFT || alignment == ALIGN_RIGHT;
int dx = horiz ? (alignment == ALIGN_LEFT ? alignment_value - tab.getRight()
: alignment_value - tab.getLeft()) : 0;
int dy = horiz ? 0 : (alignment == ALIGN_TOP ? alignment_value - tab.getBottom()
: alignment_value - tab.getTop());
Animation trans = new TranslateAnimation(0, dx, 0, dy);
trans.setDuration(ANIM_DURATION);
trans.setFillAfter(true);
tab.startAnimation(trans);
text.startAnimation(trans);
target.setVisibility(View.INVISIBLE);
}
void show(boolean animate) {
text.setVisibility(View.VISIBLE);
tab.setVisibility(View.VISIBLE);
//target.setVisibility(View.INVISIBLE);
if (animate) {
boolean horiz = alignment == ALIGN_LEFT || alignment == ALIGN_RIGHT;
int dx = horiz ? (alignment == ALIGN_LEFT ? tab.getWidth() : -tab.getWidth()) : 0;
int dy = horiz ? 0: (alignment == ALIGN_TOP ? tab.getHeight() : -tab.getHeight());
Animation trans = new TranslateAnimation(-dx, 0, -dy, 0);
trans.setDuration(ANIM_DURATION);
tab.startAnimation(trans);
text.startAnimation(trans);
}
}
void setState(int state) {
text.setPressed(state == STATE_PRESSED);
tab.setPressed(state == STATE_PRESSED);
if (state == STATE_ACTIVE) {
final int[] activeState = new int[] {com.android.internal.R.attr.state_active};
if (text.getBackground().isStateful()) {
text.getBackground().setState(activeState);
}
if (tab.getBackground().isStateful()) {
tab.getBackground().setState(activeState);
}
text.setTextAppearance(text.getContext(), R.style.TextAppearance_SlidingTabActive);
} else {
text.setTextAppearance(text.getContext(), R.style.TextAppearance_SlidingTabNormal);
}
currentState = state;
}
void showTarget() {
AlphaAnimation alphaAnim = new AlphaAnimation(0.0f, 1.0f);
alphaAnim.setDuration(ANIM_TARGET_TIME);
target.startAnimation(alphaAnim);
target.setVisibility(View.VISIBLE);
}
void reset(boolean animate) {
setState(STATE_NORMAL);
text.setVisibility(View.VISIBLE);
text.setTextAppearance(text.getContext(), R.style.TextAppearance_SlidingTabNormal);
tab.setVisibility(View.VISIBLE);
target.setVisibility(View.INVISIBLE);
final boolean horiz = alignment == ALIGN_LEFT || alignment == ALIGN_RIGHT;
int dx = horiz ? (alignment == ALIGN_LEFT ? alignment_value - tab.getLeft()
: alignment_value - tab.getRight()) : 0;
int dy = horiz ? 0 : (alignment == ALIGN_TOP ? alignment_value - tab.getTop()
: alignment_value - tab.getBottom());
if (animate) {
TranslateAnimation trans = new TranslateAnimation(0, dx, 0, dy);
trans.setDuration(ANIM_DURATION);
trans.setFillAfter(false);
text.startAnimation(trans);
tab.startAnimation(trans);
} else {
if (horiz) {
text.offsetLeftAndRight(dx);
tab.offsetLeftAndRight(dx);
} else {
text.offsetTopAndBottom(dy);
tab.offsetTopAndBottom(dy);
}
text.clearAnimation();
tab.clearAnimation();
target.clearAnimation();
}
}
void setTarget(int targetId) {
target.setImageResource(targetId);
}
/**
* Layout the given widgets within the parent.
*
* @param l the parent's left border
* @param t the parent's top border
* @param r the parent's right border
* @param b the parent's bottom border
* @param alignment which side to align the widget to
*/
void layout(int l, int t, int r, int b, int alignment) {
this.alignment = alignment;
final Drawable tabBackground = tab.getBackground();
final int handleWidth = tabBackground.getIntrinsicWidth();
final int handleHeight = tabBackground.getIntrinsicHeight();
final Drawable targetDrawable = target.getDrawable();
final int targetWidth = targetDrawable.getIntrinsicWidth();
final int targetHeight = targetDrawable.getIntrinsicHeight();
final int parentWidth = r - l;
final int parentHeight = b - t;
final int leftTarget = (int) (THRESHOLD * parentWidth) - targetWidth + handleWidth / 2;
final int rightTarget = (int) ((1.0f - THRESHOLD) * parentWidth) - handleWidth / 2;
final int left = (parentWidth - handleWidth) / 2;
final int right = left + handleWidth;
if (alignment == ALIGN_LEFT || alignment == ALIGN_RIGHT) {
// horizontal
final int targetTop = (parentHeight - targetHeight) / 2;
final int targetBottom = targetTop + targetHeight;
final int top = (parentHeight - handleHeight) / 2;
final int bottom = (parentHeight + handleHeight) / 2;
if (alignment == ALIGN_LEFT) {
tab.layout(0, top, handleWidth, bottom);
text.layout(0 - parentWidth, top, 0, bottom);
text.setGravity(Gravity.RIGHT);
target.layout(leftTarget, targetTop, leftTarget + targetWidth, targetBottom);
alignment_value = l;
} else {
tab.layout(parentWidth - handleWidth, top, parentWidth, bottom);
text.layout(parentWidth, top, parentWidth + parentWidth, bottom);
target.layout(rightTarget, targetTop, rightTarget + targetWidth, targetBottom);
text.setGravity(Gravity.TOP);
alignment_value = r;
}
} else {
// vertical
final int targetLeft = (parentWidth - targetWidth) / 2;
final int targetRight = (parentWidth + targetWidth) / 2;
final int top = (int) (THRESHOLD * parentHeight) + handleHeight / 2 - targetHeight;
final int bottom = (int) ((1.0f - THRESHOLD) * parentHeight) - handleHeight / 2;
if (alignment == ALIGN_TOP) {
tab.layout(left, 0, right, handleHeight);
text.layout(left, 0 - parentHeight, right, 0);
target.layout(targetLeft, top, targetRight, top + targetHeight);
alignment_value = t;
} else {
tab.layout(left, parentHeight - handleHeight, right, parentHeight);
text.layout(left, parentHeight, right, parentHeight + parentHeight);
target.layout(targetLeft, bottom, targetRight, bottom + targetHeight);
alignment_value = b;
}
}
}
public void updateDrawableStates() {
setState(currentState);
}
/**
* Ensure all the dependent widgets are measured.
*/
public void measure() {
tab.measure(View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED),
View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED));
text.measure(View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED),
View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED));
}
/**
* Get the measured tab width. Must be called after {@link Slider#measure()}.
* @return
*/
public int getTabWidth() {
return tab.getMeasuredWidth();
}
/**
* Get the measured tab width. Must be called after {@link Slider#measure()}.
* @return
*/
public int getTabHeight() {
return tab.getMeasuredHeight();
}
/**
* Start animating the slider. Note we need two animations since a ValueAnimator
* keeps internal state of the invalidation region which is just the view being animated.
*
* @param anim1
* @param anim2
*/
public void startAnimation(Animation anim1, Animation anim2) {
tab.startAnimation(anim1);
text.startAnimation(anim2);
}
public void hideTarget() {
target.clearAnimation();
target.setVisibility(View.INVISIBLE);
}
}
public SlidingTab(Context context) {
this(context, null);
}
/**
* Constructor used when this widget is created from a layout file.
*/
public SlidingTab(Context context, AttributeSet attrs) {
super(context, attrs);
// Allocate a temporary once that can be used everywhere.
mTmpRect = new Rect();
TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.SlidingTab);
mOrientation = a.getInt(R.styleable.SlidingTab_orientation, HORIZONTAL);
a.recycle();
Resources r = getResources();
mDensity = r.getDisplayMetrics().density;
if (DBG) log("- Density: " + mDensity);
mLeftSlider = new Slider(this,
R.drawable.jog_tab_left_generic,
R.drawable.jog_tab_bar_left_generic,
R.drawable.jog_tab_target_gray);
mRightSlider = new Slider(this,
R.drawable.jog_tab_right_generic,
R.drawable.jog_tab_bar_right_generic,
R.drawable.jog_tab_target_gray);
// setBackgroundColor(0x80808080);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int widthSpecMode = MeasureSpec.getMode(widthMeasureSpec);
int widthSpecSize = MeasureSpec.getSize(widthMeasureSpec);
int heightSpecMode = MeasureSpec.getMode(heightMeasureSpec);
int heightSpecSize = MeasureSpec.getSize(heightMeasureSpec);
if (DBG) {
if (widthSpecMode == MeasureSpec.UNSPECIFIED
|| heightSpecMode == MeasureSpec.UNSPECIFIED) {
Log.e("SlidingTab", "SlidingTab cannot have UNSPECIFIED MeasureSpec"
+"(wspec=" + widthSpecMode + ", hspec=" + heightSpecMode + ")",
new RuntimeException(LOG_TAG + "stack:"));
}
}
mLeftSlider.measure();
mRightSlider.measure();
final int leftTabWidth = mLeftSlider.getTabWidth();
final int rightTabWidth = mRightSlider.getTabWidth();
final int leftTabHeight = mLeftSlider.getTabHeight();
final int rightTabHeight = mRightSlider.getTabHeight();
final int width;
final int height;
if (isHorizontal()) {
width = Math.max(widthSpecSize, leftTabWidth + rightTabWidth);
height = Math.max(leftTabHeight, rightTabHeight);
} else {
width = Math.max(leftTabWidth, rightTabHeight);
height = Math.max(heightSpecSize, leftTabHeight + rightTabHeight);
}
setMeasuredDimension(width, height);
}
@Override
public boolean onInterceptTouchEvent(MotionEvent event) {
final int action = event.getAction();
final float x = event.getX();
final float y = event.getY();
if (mAnimating) {
return false;
}
View leftHandle = mLeftSlider.tab;
leftHandle.getHitRect(mTmpRect);
boolean leftHit = mTmpRect.contains((int) x, (int) y);
View rightHandle = mRightSlider.tab;
rightHandle.getHitRect(mTmpRect);
boolean rightHit = mTmpRect.contains((int)x, (int) y);
if (!mTracking && !(leftHit || rightHit)) {
return false;
}
switch (action) {
case MotionEvent.ACTION_DOWN: {
mTracking = true;
mTriggered = false;
vibrate(VIBRATE_SHORT);
if (leftHit) {
mCurrentSlider = mLeftSlider;
mOtherSlider = mRightSlider;
mThreshold = isHorizontal() ? THRESHOLD : 1.0f - THRESHOLD;
setGrabbedState(OnTriggerListener.LEFT_HANDLE);
} else {
mCurrentSlider = mRightSlider;
mOtherSlider = mLeftSlider;
mThreshold = isHorizontal() ? 1.0f - THRESHOLD : THRESHOLD;
setGrabbedState(OnTriggerListener.RIGHT_HANDLE);
}
mCurrentSlider.setState(Slider.STATE_PRESSED);
mCurrentSlider.showTarget();
mOtherSlider.hide();
break;
}
}
return true;
}
/**
* Reset the tabs to their original state and stop any existing animation.
* Animate them back into place if animate is true.
*
* @param animate
*/
public void reset(boolean animate) {
mLeftSlider.reset(animate);
mRightSlider.reset(animate);
if (!animate) {
mAnimating = false;
}
}
@Override
public void setVisibility(int visibility) {
// Clear animations so sliders don't continue to animate when we show the widget again.
if (visibility != getVisibility() && visibility == View.INVISIBLE) {
reset(false);
}
super.setVisibility(visibility);
}
@Override
public boolean onTouchEvent(MotionEvent event) {
if (mTracking) {
final int action = event.getAction();
final float x = event.getX();
final float y = event.getY();
switch (action) {
case MotionEvent.ACTION_MOVE:
if (withinView(x, y, this) ) {
moveHandle(x, y);
float position = isHorizontal() ? x : y;
float target = mThreshold * (isHorizontal() ? getWidth() : getHeight());
boolean thresholdReached;
if (isHorizontal()) {
thresholdReached = mCurrentSlider == mLeftSlider ?
position > target : position < target;
} else {
thresholdReached = mCurrentSlider == mLeftSlider ?
position < target : position > target;
}
if (!mTriggered && thresholdReached) {
mTriggered = true;
mTracking = false;
mCurrentSlider.setState(Slider.STATE_ACTIVE);
boolean isLeft = mCurrentSlider == mLeftSlider;
dispatchTriggerEvent(isLeft ?
OnTriggerListener.LEFT_HANDLE : OnTriggerListener.RIGHT_HANDLE);
startAnimating(isLeft ? mHoldLeftOnTransition : mHoldRightOnTransition);
setGrabbedState(OnTriggerListener.NO_HANDLE);
}
break;
}
// Intentionally fall through - we're outside tracking rectangle
case MotionEvent.ACTION_UP:
case MotionEvent.ACTION_CANCEL:
cancelGrab();
break;
}
}
return mTracking || super.onTouchEvent(event);
}
private void cancelGrab() {
mTracking = false;
mTriggered = false;
mOtherSlider.show(true);
mCurrentSlider.reset(false);
mCurrentSlider.hideTarget();
mCurrentSlider = null;
mOtherSlider = null;
setGrabbedState(OnTriggerListener.NO_HANDLE);
}
void startAnimating(final boolean holdAfter) {
mAnimating = true;
final Animation trans1;
final Animation trans2;
final Slider slider = mCurrentSlider;
final Slider other = mOtherSlider;
final int dx;
final int dy;
if (isHorizontal()) {
int right = slider.tab.getRight();
int width = slider.tab.getWidth();
int left = slider.tab.getLeft();
int viewWidth = getWidth();
int holdOffset = holdAfter ? 0 : width; // how much of tab to show at the end of anim
dx = slider == mRightSlider ? - (right + viewWidth - holdOffset)
: (viewWidth - left) + viewWidth - holdOffset;
dy = 0;
} else {
int top = slider.tab.getTop();
int bottom = slider.tab.getBottom();
int height = slider.tab.getHeight();
int viewHeight = getHeight();
int holdOffset = holdAfter ? 0 : height; // how much of tab to show at end of anim
dx = 0;
dy = slider == mRightSlider ? (top + viewHeight - holdOffset)
: - ((viewHeight - bottom) + viewHeight - holdOffset);
}
trans1 = new TranslateAnimation(0, dx, 0, dy);
trans1.setDuration(ANIM_DURATION);
trans1.setInterpolator(new LinearInterpolator());
trans1.setFillAfter(true);
trans2 = new TranslateAnimation(0, dx, 0, dy);
trans2.setDuration(ANIM_DURATION);
trans2.setInterpolator(new LinearInterpolator());
trans2.setFillAfter(true);
trans1.setAnimationListener(new AnimationListener() {
public void onAnimationEnd(Animation animation) {
Animation anim;
if (holdAfter) {
anim = new TranslateAnimation(dx, dx, dy, dy);
anim.setDuration(1000); // plenty of time for transitions
mAnimating = false;
} else {
anim = new AlphaAnimation(0.5f, 1.0f);
anim.setDuration(ANIM_DURATION);
resetView();
}
anim.setAnimationListener(mAnimationDoneListener);
/* Animation can be the same for these since the animation just holds */
mLeftSlider.startAnimation(anim, anim);
mRightSlider.startAnimation(anim, anim);
}
public void onAnimationRepeat(Animation animation) {
}
public void onAnimationStart(Animation animation) {
}
});
slider.hideTarget();
slider.startAnimation(trans1, trans2);
}
private void onAnimationDone() {
resetView();
mAnimating = false;
}
private boolean withinView(final float x, final float y, final View view) {
return isHorizontal() && y > - TRACKING_MARGIN && y < TRACKING_MARGIN + view.getHeight()
|| !isHorizontal() && x > -TRACKING_MARGIN && x < TRACKING_MARGIN + view.getWidth();
}
private boolean isHorizontal() {
return mOrientation == HORIZONTAL;
}
private void resetView() {
mLeftSlider.reset(false);
mRightSlider.reset(false);
// onLayout(true, getLeft(), getTop(), getLeft() + getWidth(), getTop() + getHeight());
}
@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
if (!changed) return;
// Center the widgets in the view
mLeftSlider.layout(l, t, r, b, isHorizontal() ? Slider.ALIGN_LEFT : Slider.ALIGN_BOTTOM);
mRightSlider.layout(l, t, r, b, isHorizontal() ? Slider.ALIGN_RIGHT : Slider.ALIGN_TOP);
}
private void moveHandle(float x, float y) {
final View handle = mCurrentSlider.tab;
final View content = mCurrentSlider.text;
if (isHorizontal()) {
int deltaX = (int) x - handle.getLeft() - (handle.getWidth() / 2);
handle.offsetLeftAndRight(deltaX);
content.offsetLeftAndRight(deltaX);
} else {
int deltaY = (int) y - handle.getTop() - (handle.getHeight() / 2);
handle.offsetTopAndBottom(deltaY);
content.offsetTopAndBottom(deltaY);
}
invalidate(); // TODO: be more conservative about what we're invalidating
}
/**
* Sets the left handle icon to a given resource.
*
* The resource should refer to a Drawable object, or use 0 to remove
* the icon.
*
* @param iconId the resource ID of the icon drawable
* @param targetId the resource of the target drawable
* @param barId the resource of the bar drawable (stateful)
* @param tabId the resource of the
*/
public void setLeftTabResources(int iconId, int targetId, int barId, int tabId) {
mLeftSlider.setIcon(iconId);
mLeftSlider.setTarget(targetId);
mLeftSlider.setBarBackgroundResource(barId);
mLeftSlider.setTabBackgroundResource(tabId);
mLeftSlider.updateDrawableStates();
}
/**
* Sets the left handle hint text to a given resource string.
*
* @param resId
*/
public void setLeftHintText(int resId) {
if (isHorizontal()) {
mLeftSlider.setHintText(resId);
}
}
/**
* Sets the right handle icon to a given resource.
*
* The resource should refer to a Drawable object, or use 0 to remove
* the icon.
*
* @param iconId the resource ID of the icon drawable
* @param targetId the resource of the target drawable
* @param barId the resource of the bar drawable (stateful)
* @param tabId the resource of the
*/
public void setRightTabResources(int iconId, int targetId, int barId, int tabId) {
mRightSlider.setIcon(iconId);
mRightSlider.setTarget(targetId);
mRightSlider.setBarBackgroundResource(barId);
mRightSlider.setTabBackgroundResource(tabId);
mRightSlider.updateDrawableStates();
}
/**
* Sets the left handle hint text to a given resource string.
*
* @param resId
*/
public void setRightHintText(int resId) {
if (isHorizontal()) {
mRightSlider.setHintText(resId);
}
}
public void setHoldAfterTrigger(boolean holdLeft, boolean holdRight) {
mHoldLeftOnTransition = holdLeft;
mHoldRightOnTransition = holdRight;
}
/**
* Triggers haptic feedback.
*/
private synchronized void vibrate(long duration) {
final boolean hapticEnabled = Settings.System.getIntForUser(
mContext.getContentResolver(), Settings.System.HAPTIC_FEEDBACK_ENABLED, 1,
UserHandle.USER_CURRENT) != 0;
if (hapticEnabled) {
if (mVibrator == null) {
mVibrator = (android.os.Vibrator) getContext()
.getSystemService(Context.VIBRATOR_SERVICE);
}
mVibrator.vibrate(duration, VIBRATION_ATTRIBUTES);
}
}
/**
* Registers a callback to be invoked when the user triggers an event.
*
* @param listener the OnDialTriggerListener to attach to this view
*/
public void setOnTriggerListener(OnTriggerListener listener) {
mOnTriggerListener = listener;
}
/**
* Dispatches a trigger event to listener. Ignored if a listener is not set.
* @param whichHandle the handle that triggered the event.
*/
private void dispatchTriggerEvent(int whichHandle) {
vibrate(VIBRATE_LONG);
if (mOnTriggerListener != null) {
mOnTriggerListener.onTrigger(this, whichHandle);
}
}
@Override
protected void onVisibilityChanged(View changedView, int visibility) {
super.onVisibilityChanged(changedView, visibility);
// When visibility changes and the user has a tab selected, unselect it and
// make sure their callback gets called.
if (changedView == this && visibility != VISIBLE
&& mGrabbedState != OnTriggerListener.NO_HANDLE) {
cancelGrab();
}
}
/**
* Sets the current grabbed state, and dispatches a grabbed state change
* event to our listener.
*/
private void setGrabbedState(int newState) {
if (newState != mGrabbedState) {
mGrabbedState = newState;
if (mOnTriggerListener != null) {
mOnTriggerListener.onGrabbedStateChange(this, mGrabbedState);
}
}
}
private void log(String msg) {
Log.d(LOG_TAG, msg);
}
}
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