Something went wrong on our end
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Tadashi G. Takaoka authored
Bug: 2910379 Change-Id: I179ae4359afb57c351d5fcc5f5453c30d3ef0c01
Tadashi G. Takaoka authoredBug: 2910379 Change-Id: I179ae4359afb57c351d5fcc5f5453c30d3ef0c01
LatinKeyboardBaseView.java 45.46 KiB
/*
* Copyright (C) 2010 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.inputmethod.latin;
import android.content.Context;
import android.content.res.Resources;
import android.content.res.TypedArray;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Paint.Align;
import android.graphics.PorterDuff;
import android.graphics.Rect;
import android.graphics.Region.Op;
import android.graphics.Typeface;
import android.graphics.drawable.Drawable;
import android.inputmethodservice.Keyboard;
import android.inputmethodservice.Keyboard.Key;
import android.os.Handler;
import android.os.Message;
import android.util.AttributeSet;
import android.util.TypedValue;
import android.view.GestureDetector;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup.LayoutParams;
import android.widget.PopupWindow;
import android.widget.TextView;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
* A view that renders a virtual {@link LatinKeyboard}. It handles rendering of keys and
* detecting key presses and touch movements.
*
* @attr ref R.styleable#LatinKeyboardBaseView_keyBackground
* @attr ref R.styleable#LatinKeyboardBaseView_keyPreviewLayout
* @attr ref R.styleable#LatinKeyboardBaseView_keyPreviewOffset
* @attr ref R.styleable#LatinKeyboardBaseView_labelTextSize
* @attr ref R.styleable#LatinKeyboardBaseView_keyTextSize
* @attr ref R.styleable#LatinKeyboardBaseView_keyTextColor
* @attr ref R.styleable#LatinKeyboardBaseView_verticalCorrection
* @attr ref R.styleable#LatinKeyboardBaseView_popupLayout
*/
public class LatinKeyboardBaseView extends View implements View.OnClickListener,
PointerTracker.UIProxy {
private static final boolean DEBUG = false;
public static final int NOT_A_TOUCH_COORDINATE = -1;
public interface OnKeyboardActionListener {
/**
* Called when the user presses a key. This is sent before the
* {@link #onKey} is called. For keys that repeat, this is only
* called once.
*
* @param primaryCode
* the unicode of the key being pressed. If the touch is
* not on a valid key, the value will be zero.
*/
void onPress(int primaryCode);
/**
* Called when the user releases a key. This is sent after the
* {@link #onKey} is called. For keys that repeat, this is only
* called once.
*
* @param primaryCode
* the code of the key that was released
*/
void onRelease(int primaryCode);
/**
* Send a key press to the listener.
*
* @param primaryCode
* this is the key that was pressed
* @param keyCodes
* the codes for all the possible alternative keys with
* the primary code being the first. If the primary key
* code is a single character such as an alphabet or
* number or symbol, the alternatives will include other
* characters that may be on the same key or adjacent
* keys. These codes are useful to correct for
* accidental presses of a key adjacent to the intended
* key.
* @param x
* x-coordinate pixel of touched event. If onKey is not called by onTouchEvent,
* the value should be NOT_A_TOUCH_COORDINATE.
* @param y
* y-coordinate pixel of touched event. If onKey is not called by onTouchEvent,
* the value should be NOT_A_TOUCH_COORDINATE.
*/
void onKey(int primaryCode, int[] keyCodes, int x, int y);
/**
* Sends a sequence of characters to the listener.
*
* @param text
* the sequence of characters to be displayed.
*/
void onText(CharSequence text);
/**
* Called when the user quickly moves the finger from right to
* left.
*/
void swipeLeft();
/**
* Called when the user quickly moves the finger from left to
* right.
*/
void swipeRight();
/**
* Called when the user quickly moves the finger from up to down.
*/
void swipeDown();
/**
* Called when the user quickly moves the finger from down to up.
*/
void swipeUp();
}
// Timing constants
private static final int DELAY_BEFORE_PREVIEW = 0;
private static final int DELAY_AFTER_PREVIEW = 70;
private static final int REPEAT_INTERVAL = PointerTracker.REPEAT_INTERVAL;
// Miscellaneous constants
/* package */ static final int NOT_A_KEY = -1;
private static final int[] LONG_PRESSABLE_STATE_SET = { android.R.attr.state_long_pressable };
// XML attribute
private int mKeyTextSize;
private int mKeyTextColor;
private Typeface mKeyTextStyle = Typeface.DEFAULT;
private int mLabelTextSize;
private int mSymbolColorScheme = 0;
private int mShadowColor;
private float mShadowRadius;
private Drawable mKeyBackground;
private float mBackgroundDimAmount;
private int mVerticalCorrection;
private int mPreviewOffset;
private int mPreviewHeight;
private int mPopupLayout;
// Main keyboard
private Keyboard mKeyboard;
private Key[] mKeys;
// Key preview popup
private final static boolean PREVIEW_CENTERED = false;
private TextView mPreviewText;
private PopupWindow mPreviewPopup;
private int mPreviewTextSizeLarge;
private int[] mOffsetInWindow;
private int mOldPreviewKeyIndex = NOT_A_KEY;
private boolean mShowPreview = true;
private boolean mShowTouchPoints = true;
private int mPopupPreviewX;
private int mPopupPreviewY;
private int mWindowY;
// Popup mini keyboard
private PopupWindow mPopupKeyboard;
private View mMiniKeyboardContainer;
private LatinKeyboardBaseView mMiniKeyboard;
private boolean mMiniKeyboardOnScreen;
private View mPopupParent;
private int mMiniKeyboardOffsetX;
private int mMiniKeyboardOffsetY;
private Map<Key,View> mMiniKeyboardCache;
private int[] mWindowOffset;
/** Listener for {@link OnKeyboardActionListener}. */
private OnKeyboardActionListener mKeyboardActionListener;
private final ArrayList<PointerTracker> mPointerTrackers = new ArrayList<PointerTracker>();
private final float mDebounceHysteresis;
private final ProximityKeyDetector mProximityKeyDetector = new ProximityKeyDetector();
// Swipe gesture detector
private final GestureDetector mGestureDetector;
private final SwipeTracker mSwipeTracker = new SwipeTracker();
private final int mSwipeThreshold; private final boolean mDisambiguateSwipe;
// Drawing
/** Whether the keyboard bitmap needs to be redrawn before it's blitted. **/
private boolean mDrawPending;
/** The dirty region in the keyboard bitmap */
private final Rect mDirtyRect = new Rect();
/** The keyboard bitmap for faster updates */
private Bitmap mBuffer;
/** Notes if the keyboard just changed, so that we could possibly reallocate the mBuffer. */
private boolean mKeyboardChanged;
private Key mInvalidatedKey;
/** The canvas for the above mutable keyboard bitmap */
private Canvas mCanvas;
private final Paint mPaint;
private final Rect mPadding;
private final Rect mClipRegion = new Rect(0, 0, 0, 0);
private final UIHandler mHandler = new UIHandler();
class UIHandler extends Handler {
private static final int MSG_POPUP_PREVIEW = 1;
private static final int MSG_DISMISS_PREVIEW = 2;
private static final int MSG_REPEAT_KEY = 3;
private static final int MSG_LONGPRESS_KEY = 4;
private boolean mInKeyRepeat;
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case MSG_POPUP_PREVIEW:
showKey(msg.arg1, (PointerTracker)msg.obj);
break;
case MSG_DISMISS_PREVIEW:
mPreviewText.setVisibility(INVISIBLE);
break;
case MSG_REPEAT_KEY: {
final PointerTracker tracker = (PointerTracker)msg.obj;
tracker.repeatKey(msg.arg1);
startKeyRepeatTimer(REPEAT_INTERVAL, msg.arg1, tracker);
break;
}
case MSG_LONGPRESS_KEY:
openPopupIfRequired(msg.arg1);
break;
}
}
public void popupPreview(long delay, int keyIndex, PointerTracker tracker) {
removeMessages(MSG_POPUP_PREVIEW);
if (mPreviewPopup.isShowing() && mPreviewText.getVisibility() == VISIBLE) {
// Show right away, if it's already visible and finger is moving around
showKey(keyIndex, tracker);
} else {
sendMessageDelayed(obtainMessage(MSG_POPUP_PREVIEW, keyIndex, 0, tracker),
delay);
}
}
public void cancelPopupPreview() {
removeMessages(MSG_POPUP_PREVIEW);
}
public void dismissPreview(long delay) {
if (mPreviewPopup.isShowing()) {
sendMessageDelayed(obtainMessage(MSG_DISMISS_PREVIEW), delay);
}
}
public void cancelDismissPreview() {
removeMessages(MSG_DISMISS_PREVIEW);
}
public void startKeyRepeatTimer(long delay, int keyIndex, PointerTracker tracker) {
mInKeyRepeat = true;
sendMessageDelayed(obtainMessage(MSG_REPEAT_KEY, keyIndex, 0, tracker), delay);
}
public void cancelKeyRepeatTimer() {
mInKeyRepeat = false;
removeMessages(MSG_REPEAT_KEY);
}
public boolean isInKeyRepeat() {
return mInKeyRepeat;
}
public void startLongPressTimer(int keyIndex, long delay) {
removeMessages(MSG_LONGPRESS_KEY);
sendMessageDelayed(obtainMessage(MSG_LONGPRESS_KEY, keyIndex, 0), delay);
}
public void cancelLongPressTimer() {
removeMessages(MSG_LONGPRESS_KEY);
}
public void cancelKeyTimers() {
cancelKeyRepeatTimer();
cancelLongPressTimer();
}
public void cancelAllMessages() {
cancelKeyTimers();
cancelPopupPreview();
cancelDismissPreview();
}
};
public LatinKeyboardBaseView(Context context, AttributeSet attrs) {
this(context, attrs, R.attr.keyboardViewStyle);
}
public LatinKeyboardBaseView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
TypedArray a = context.obtainStyledAttributes(
attrs, R.styleable.LatinKeyboardBaseView, defStyle, R.style.LatinKeyboardBaseView);
LayoutInflater inflate =
(LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
int previewLayout = 0;
int keyTextSize = 0;
int n = a.getIndexCount();
for (int i = 0; i < n; i++) {
int attr = a.getIndex(i);
switch (attr) {
case R.styleable.LatinKeyboardBaseView_keyBackground:
mKeyBackground = a.getDrawable(attr);
break;
case R.styleable.LatinKeyboardBaseView_verticalCorrection:
mVerticalCorrection = a.getDimensionPixelOffset(attr, 0);
break;
case R.styleable.LatinKeyboardBaseView_keyPreviewLayout:
previewLayout = a.getResourceId(attr, 0);
break;
case R.styleable.LatinKeyboardBaseView_keyPreviewOffset:
mPreviewOffset = a.getDimensionPixelOffset(attr, 0); break;
case R.styleable.LatinKeyboardBaseView_keyPreviewHeight:
mPreviewHeight = a.getDimensionPixelSize(attr, 80);
break;
case R.styleable.LatinKeyboardBaseView_keyTextSize:
mKeyTextSize = a.getDimensionPixelSize(attr, 18);
break;
case R.styleable.LatinKeyboardBaseView_keyTextColor:
mKeyTextColor = a.getColor(attr, 0xFF000000);
break;
case R.styleable.LatinKeyboardBaseView_labelTextSize:
mLabelTextSize = a.getDimensionPixelSize(attr, 14);
break;
case R.styleable.LatinKeyboardBaseView_popupLayout:
mPopupLayout = a.getResourceId(attr, 0);
break;
case R.styleable.LatinKeyboardBaseView_shadowColor:
mShadowColor = a.getColor(attr, 0);
break;
case R.styleable.LatinKeyboardBaseView_shadowRadius:
mShadowRadius = a.getFloat(attr, 0f);
break;
// TODO: Use Theme (android.R.styleable.Theme_backgroundDimAmount)
case R.styleable.LatinKeyboardBaseView_backgroundDimAmount:
mBackgroundDimAmount = a.getFloat(attr, 0.5f);
break;
//case android.R.styleable.
case R.styleable.LatinKeyboardBaseView_keyTextStyle:
int textStyle = a.getInt(attr, 0);
switch (textStyle) {
case 0:
mKeyTextStyle = Typeface.DEFAULT;
break;
case 1:
mKeyTextStyle = Typeface.DEFAULT_BOLD;
break;
default:
mKeyTextStyle = Typeface.defaultFromStyle(textStyle);
break;
}
break;
case R.styleable.LatinKeyboardBaseView_symbolColorScheme:
mSymbolColorScheme = a.getInt(attr, 0);
break;
}
}
mPreviewPopup = new PopupWindow(context);
if (previewLayout != 0) {
mPreviewText = (TextView) inflate.inflate(previewLayout, null);
mPreviewTextSizeLarge = (int) mPreviewText.getTextSize();
mPreviewPopup.setContentView(mPreviewText);
mPreviewPopup.setBackgroundDrawable(null);
} else {
mShowPreview = false;
}
mPreviewPopup.setTouchable(false);
mPopupParent = this;
mPopupKeyboard = new PopupWindow(context);
mPopupKeyboard.setBackgroundDrawable(null);
mPaint = new Paint();
mPaint.setAntiAlias(true);
mPaint.setTextSize(keyTextSize);
mPaint.setTextAlign(Align.CENTER);
mPaint.setAlpha(255);
mPadding = new Rect(0, 0, 0, 0);
mMiniKeyboardCache = new HashMap<Key,View>(); mKeyBackground.getPadding(mPadding);
final Resources res = getResources();
mSwipeThreshold = (int) (500 * res.getDisplayMetrics().density);
// TODO: Refer frameworks/base/core/res/res/values/config.xml
mDisambiguateSwipe = res.getBoolean(R.bool.config_swipeDisambiguation);
mDebounceHysteresis = res.getDimension(R.dimen.key_debounce_hysteresis_distance);
GestureDetector.SimpleOnGestureListener listener =
new GestureDetector.SimpleOnGestureListener() {
@Override
public boolean onFling(MotionEvent me1, MotionEvent me2, float velocityX,
float velocityY) {
final float absX = Math.abs(velocityX);
final float absY = Math.abs(velocityY);
float deltaX = me2.getX() - me1.getX();
float deltaY = me2.getY() - me1.getY();
int travelX = getWidth() / 2; // Half the keyboard width
int travelY = getHeight() / 2; // Half the keyboard height
mSwipeTracker.computeCurrentVelocity(1000);
final float endingVelocityX = mSwipeTracker.getXVelocity();
final float endingVelocityY = mSwipeTracker.getYVelocity();
if (velocityX > mSwipeThreshold && absY < absX && deltaX > travelX) {
if (mDisambiguateSwipe && endingVelocityX >= velocityX / 4) {
swipeRight();
return true;
}
} else if (velocityX < -mSwipeThreshold && absY < absX && deltaX < -travelX) {
if (mDisambiguateSwipe && endingVelocityX <= velocityX / 4) {
swipeLeft();
return true;
}
} else if (velocityY < -mSwipeThreshold && absX < absY && deltaY < -travelY) {
if (mDisambiguateSwipe && endingVelocityY <= velocityY / 4) {
swipeUp();
return true;
}
} else if (velocityY > mSwipeThreshold && absX < absY / 2 && deltaY > travelY) {
if (mDisambiguateSwipe && endingVelocityY >= velocityY / 4) {
swipeDown();
return true;
}
}
return false;
}
};
final boolean ignoreMultitouch = true;
mGestureDetector = new GestureDetector(getContext(), listener, null, ignoreMultitouch);
mGestureDetector.setIsLongpressEnabled(false);
}
public void setOnKeyboardActionListener(OnKeyboardActionListener listener) {
mKeyboardActionListener = listener;
for (PointerTracker tracker : mPointerTrackers) {
if (tracker != null)
tracker.setOnKeyboardActionListener(listener);
}
}
/**
* Returns the {@link OnKeyboardActionListener} object.
* @return the listener attached to this keyboard
*/
protected OnKeyboardActionListener getOnKeyboardActionListener() {
return mKeyboardActionListener;
}
/**
* Attaches a keyboard to this view. The keyboard can be switched at any time and the * view will re-layout itself to accommodate the keyboard.
* @see Keyboard
* @see #getKeyboard()
* @param keyboard the keyboard to display in this view
*/
public void setKeyboard(Keyboard keyboard) {
if (mKeyboard != null) {
dismissKeyPreview();
}
// Remove any pending messages, except dismissing preview
mHandler.cancelKeyTimers();
mHandler.cancelPopupPreview();
mKeyboard = keyboard;
LatinImeLogger.onSetKeyboard(mKeyboard);
List<Key> keys = mKeyboard.getKeys();
mKeys = keys.toArray(new Key[keys.size()]);
mProximityKeyDetector.setKeyboard(keyboard, mKeys);
for (PointerTracker tracker : mPointerTrackers) {
if (tracker != null)
tracker.setKeyboard(mKeys, mDebounceHysteresis);
}
requestLayout();
// Hint to reallocate the buffer if the size changed
mKeyboardChanged = true;
invalidateAllKeys();
computeProximityThreshold(keyboard);
mMiniKeyboardCache.clear();
}
/**
* Returns the current keyboard being displayed by this view.
* @return the currently attached keyboard
* @see #setKeyboard(Keyboard)
*/
public Keyboard getKeyboard() {
return mKeyboard;
}
/**
* Sets the state of the shift key of the keyboard, if any.
* @param shifted whether or not to enable the state of the shift key
* @return true if the shift key state changed, false if there was no change
*/
public boolean setShifted(boolean shifted) {
if (mKeyboard != null) {
if (mKeyboard.setShifted(shifted)) {
// The whole keyboard probably needs to be redrawn
invalidateAllKeys();
return true;
}
}
return false;
}
/**
* Returns the state of the shift key of the keyboard, if any.
* @return true if the shift is in a pressed state, false otherwise. If there is
* no shift key on the keyboard or there is no keyboard attached, it returns false.
*/
public boolean isShifted() {
if (mKeyboard != null) {
return mKeyboard.isShifted();
}
return false;
}
/**
* Enables or disables the key feedback popup. This is a popup that shows a magnified
* version of the depressed key. By default the preview is enabled.
* @param previewEnabled whether or not to enable the key feedback popup * @see #isPreviewEnabled()
*/
public void setPreviewEnabled(boolean previewEnabled) {
mShowPreview = previewEnabled;
}
/**
* Returns the enabled state of the key feedback popup.
* @return whether or not the key feedback popup is enabled
* @see #setPreviewEnabled(boolean)
*/
public boolean isPreviewEnabled() {
return mShowPreview;
}
public int getSymbolColorSheme() {
return mSymbolColorScheme;
}
public void setVerticalCorrection(int verticalOffset) {
}
public void setPopupParent(View v) {
mPopupParent = v;
}
public void setPopupOffset(int x, int y) {
mMiniKeyboardOffsetX = x;
mMiniKeyboardOffsetY = y;
if (mPreviewPopup.isShowing()) {
mPreviewPopup.dismiss();
}
}
/**
* When enabled, calls to {@link OnKeyboardActionListener#onKey} will include key
* codes for adjacent keys. When disabled, only the primary key code will be
* reported.
* @param enabled whether or not the proximity correction is enabled
*/
public void setProximityCorrectionEnabled(boolean enabled) {
mProximityKeyDetector.setProximityCorrectionEnabled(enabled);
}
/**
* Returns true if proximity correction is enabled.
*/
public boolean isProximityCorrectionEnabled() {
return mProximityKeyDetector.isProximityCorrectionEnabled();
}
/**
* Popup keyboard close button clicked.
* @hide
*/
public void onClick(View v) {
dismissPopupKeyboard();
}
protected CharSequence adjustCase(CharSequence label) {
if (mKeyboard.isShifted() && label != null && label.length() < 3
&& Character.isLowerCase(label.charAt(0))) {
label = label.toString().toUpperCase();
}
return label;
}
@Override
public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
// Round up a little if (mKeyboard == null) {
setMeasuredDimension(
getPaddingLeft() + getPaddingRight(), getPaddingTop() + getPaddingBottom());
} else {
int width = mKeyboard.getMinWidth() + getPaddingLeft() + getPaddingRight();
if (MeasureSpec.getSize(widthMeasureSpec) < width + 10) {
width = MeasureSpec.getSize(widthMeasureSpec);
}
setMeasuredDimension(
width, mKeyboard.getHeight() + getPaddingTop() + getPaddingBottom());
}
}
/**
* Compute the average distance between adjacent keys (horizontally and vertically)
* and square it to get the proximity threshold. We use a square here and in computing
* the touch distance from a key's center to avoid taking a square root.
* @param keyboard
*/
private void computeProximityThreshold(Keyboard keyboard) {
if (keyboard == null) return;
final Key[] keys = mKeys;
if (keys == null) return;
int length = keys.length;
int dimensionSum = 0;
for (int i = 0; i < length; i++) {
Key key = keys[i];
dimensionSum += Math.min(key.width, key.height) + key.gap;
}
if (dimensionSum < 0 || length == 0) return;
mProximityKeyDetector.setProximityThreshold((int) (dimensionSum * 1.4f / length));
}
@Override
public void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
// Release the buffer, if any and it will be reallocated on the next draw
mBuffer = null;
}
@Override
public void onDraw(Canvas canvas) {
super.onDraw(canvas);
if (mDrawPending || mBuffer == null || mKeyboardChanged) {
onBufferDraw();
}
canvas.drawBitmap(mBuffer, 0, 0, null);
}
private void onBufferDraw() {
if (mBuffer == null || mKeyboardChanged) {
if (mBuffer == null || mKeyboardChanged &&
(mBuffer.getWidth() != getWidth() || mBuffer.getHeight() != getHeight())) {
// Make sure our bitmap is at least 1x1
final int width = Math.max(1, getWidth());
final int height = Math.max(1, getHeight());
mBuffer = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
mCanvas = new Canvas(mBuffer);
}
invalidateAllKeys();
mKeyboardChanged = false;
}
final Canvas canvas = mCanvas;
canvas.clipRect(mDirtyRect, Op.REPLACE);
if (mKeyboard == null) return;
final Paint paint = mPaint;
final Drawable keyBackground = mKeyBackground;
final Rect clipRegion = mClipRegion; final Rect padding = mPadding;
final int kbdPaddingLeft = getPaddingLeft();
final int kbdPaddingTop = getPaddingTop();
final Key[] keys = mKeys;
final Key invalidKey = mInvalidatedKey;
paint.setColor(mKeyTextColor);
boolean drawSingleKey = false;
if (invalidKey != null && canvas.getClipBounds(clipRegion)) {
// Is clipRegion completely contained within the invalidated key?
if (invalidKey.x + kbdPaddingLeft - 1 <= clipRegion.left &&
invalidKey.y + kbdPaddingTop - 1 <= clipRegion.top &&
invalidKey.x + invalidKey.width + kbdPaddingLeft + 1 >= clipRegion.right &&
invalidKey.y + invalidKey.height + kbdPaddingTop + 1 >= clipRegion.bottom) {
drawSingleKey = true;
}
}
canvas.drawColor(0x00000000, PorterDuff.Mode.CLEAR);
final int keyCount = keys.length;
for (int i = 0; i < keyCount; i++) {
final Key key = keys[i];
if (drawSingleKey && invalidKey != key) {
continue;
}
int[] drawableState = key.getCurrentDrawableState();
keyBackground.setState(drawableState);
// Switch the character to uppercase if shift is pressed
String label = key.label == null? null : adjustCase(key.label).toString();
final Rect bounds = keyBackground.getBounds();
if (key.width != bounds.right ||
key.height != bounds.bottom) {
keyBackground.setBounds(0, 0, key.width, key.height);
}
canvas.translate(key.x + kbdPaddingLeft, key.y + kbdPaddingTop);
keyBackground.draw(canvas);
if (label != null) {
// For characters, use large font. For labels like "Done", use small font.
if (label.length() > 1 && key.codes.length < 2) {
paint.setTextSize(mLabelTextSize);
paint.setTypeface(Typeface.DEFAULT_BOLD);
} else {
paint.setTextSize(mKeyTextSize);
paint.setTypeface(mKeyTextStyle);
}
// Draw a drop shadow for the text
paint.setShadowLayer(mShadowRadius, 0, 0, mShadowColor);
// Draw the text
canvas.drawText(label,
(key.width - padding.left - padding.right) / 2
+ padding.left,
(key.height - padding.top - padding.bottom) / 2
+ (paint.getTextSize() - paint.descent()) / 2 + padding.top,
paint);
// Turn off drop shadow
paint.setShadowLayer(0, 0, 0, 0);
} else if (key.icon != null) {
final int drawableX = (key.width - padding.left - padding.right
- key.icon.getIntrinsicWidth()) / 2 + padding.left;
final int drawableY = (key.height - padding.top - padding.bottom
- key.icon.getIntrinsicHeight()) / 2 + padding.top;
canvas.translate(drawableX, drawableY);
key.icon.setBounds(0, 0,
key.icon.getIntrinsicWidth(), key.icon.getIntrinsicHeight());
key.icon.draw(canvas);
canvas.translate(-drawableX, -drawableY);
}
canvas.translate(-key.x - kbdPaddingLeft, -key.y - kbdPaddingTop); }
mInvalidatedKey = null;
// Overlay a dark rectangle to dim the keyboard
if (mMiniKeyboardOnScreen) {
paint.setColor((int) (mBackgroundDimAmount * 0xFF) << 24);
canvas.drawRect(0, 0, getWidth(), getHeight(), paint);
}
if (DEBUG) {
if (mShowTouchPoints) {
for (PointerTracker tracker : mPointerTrackers) {
if (tracker == null) continue;
int startX = tracker.getStartX();
int startY = tracker.getStartY();
int lastX = tracker.getLastX();
int lastY = tracker.getLastY();
paint.setAlpha(128);
paint.setColor(0xFFFF0000);
canvas.drawCircle(startX, startY, 3, paint);
canvas.drawLine(startX, startY, lastX, lastY, paint);
paint.setColor(0xFF0000FF);
canvas.drawCircle(lastX, lastY, 3, paint);
paint.setColor(0xFF00FF00);
canvas.drawCircle((startX + lastX) / 2, (startY + lastY) / 2, 2, paint);
}
}
}
mDrawPending = false;
mDirtyRect.setEmpty();
}
// TODO: clean up this method.
private void dismissKeyPreview() {
for (PointerTracker tracker : mPointerTrackers)
tracker.updateKey(NOT_A_KEY);
showPreview(NOT_A_KEY, null);
}
public void showPreview(int keyIndex, PointerTracker tracker) {
int oldKeyIndex = mOldPreviewKeyIndex;
mOldPreviewKeyIndex = keyIndex;
// If key changed and preview is on ...
if (oldKeyIndex != keyIndex && mShowPreview) {
if (keyIndex == NOT_A_KEY) {
mHandler.cancelPopupPreview();
mHandler.dismissPreview(DELAY_AFTER_PREVIEW);
} else if (tracker != null) {
mHandler.popupPreview(DELAY_BEFORE_PREVIEW, keyIndex, tracker);
}
}
}
private void showKey(final int keyIndex, PointerTracker tracker) {
Key key = tracker.getKey(keyIndex);
if (key == null)
return;
final PopupWindow previewPopup = mPreviewPopup;
if (key.icon != null) {
mPreviewText.setCompoundDrawables(null, null, null,
key.iconPreview != null ? key.iconPreview : key.icon);
mPreviewText.setText(null);
} else {
mPreviewText.setCompoundDrawables(null, null, null, null);
mPreviewText.setText(adjustCase(tracker.getPreviewText(key)));
if (key.label.length() > 1 && key.codes.length < 2) {
mPreviewText.setTextSize(TypedValue.COMPLEX_UNIT_PX, mKeyTextSize);
mPreviewText.setTypeface(Typeface.DEFAULT_BOLD);
} else {
mPreviewText.setTextSize(TypedValue.COMPLEX_UNIT_PX, mPreviewTextSizeLarge); mPreviewText.setTypeface(mKeyTextStyle);
}
}
mPreviewText.measure(MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED),
MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
int popupWidth = Math.max(mPreviewText.getMeasuredWidth(), key.width
+ mPreviewText.getPaddingLeft() + mPreviewText.getPaddingRight());
final int popupHeight = mPreviewHeight;
LayoutParams lp = mPreviewText.getLayoutParams();
if (lp != null) {
lp.width = popupWidth;
lp.height = popupHeight;
}
if (PREVIEW_CENTERED) {
// TODO: Fix this if centering is brought back
mPopupPreviewX = 160 - mPreviewText.getMeasuredWidth() / 2;
mPopupPreviewY = - mPreviewText.getMeasuredHeight();
} else {
mPopupPreviewX = key.x - mPreviewText.getPaddingLeft() + getPaddingLeft();
mPopupPreviewY = key.y - popupHeight + mPreviewOffset;
}
mHandler.cancelDismissPreview();
if (mOffsetInWindow == null) {
mOffsetInWindow = new int[2];
getLocationInWindow(mOffsetInWindow);
mOffsetInWindow[0] += mMiniKeyboardOffsetX; // Offset may be zero
mOffsetInWindow[1] += mMiniKeyboardOffsetY; // Offset may be zero
int[] mWindowLocation = new int[2];
getLocationOnScreen(mWindowLocation);
mWindowY = mWindowLocation[1];
}
// Set the preview background state
mPreviewText.getBackground().setState(
key.popupResId != 0 ? LONG_PRESSABLE_STATE_SET : EMPTY_STATE_SET);
mPopupPreviewX += mOffsetInWindow[0];
mPopupPreviewY += mOffsetInWindow[1];
// If the popup cannot be shown above the key, put it on the side
if (mPopupPreviewY + mWindowY < 0) {
// If the key you're pressing is on the left side of the keyboard, show the popup on
// the right, offset by enough to see at least one key to the left/right.
if (key.x + key.width <= getWidth() / 2) {
mPopupPreviewX += (int) (key.width * 2.5);
} else {
mPopupPreviewX -= (int) (key.width * 2.5);
}
mPopupPreviewY += popupHeight;
}
if (previewPopup.isShowing()) {
previewPopup.update(mPopupPreviewX, mPopupPreviewY,
popupWidth, popupHeight);
} else {
previewPopup.setWidth(popupWidth);
previewPopup.setHeight(popupHeight);
previewPopup.showAtLocation(mPopupParent, Gravity.NO_GRAVITY,
mPopupPreviewX, mPopupPreviewY);
}
mPreviewText.setVisibility(VISIBLE);
}
/**
* Requests a redraw of the entire keyboard. Calling {@link #invalidate} is not sufficient
* because the keyboard renders the keys to an off-screen buffer and an invalidate() only
* draws the cached buffer.
* @see #invalidateKey(Key)
*/
public void invalidateAllKeys() {
mDirtyRect.union(0, 0, getWidth(), getHeight());
mDrawPending = true; invalidate();
}
/**
* Invalidates a key so that it will be redrawn on the next repaint. Use this method if only
* one key is changing it's content. Any changes that affect the position or size of the key
* may not be honored.
* @param key key in the attached {@link Keyboard}.
* @see #invalidateAllKeys
*/
public void invalidateKey(Key key) {
if (key == null)
return;
mInvalidatedKey = key;
mDirtyRect.union(key.x + getPaddingLeft(), key.y + getPaddingTop(),
key.x + key.width + getPaddingLeft(), key.y + key.height + getPaddingTop());
onBufferDraw();
invalidate(key.x + getPaddingLeft(), key.y + getPaddingTop(),
key.x + key.width + getPaddingLeft(), key.y + key.height + getPaddingTop());
}
private boolean openPopupIfRequired(int keyIndex) {
// Check if we have a popup layout specified first.
if (mPopupLayout == 0) {
return false;
}
if (keyIndex < 0 || keyIndex >= mKeys.length) {
return false;
}
Key popupKey = mKeys[keyIndex];
boolean result = onLongPress(popupKey);
if (result) {
dismissKeyPreview();
}
return result;
}
/**
* Called when a key is long pressed. By default this will open any popup keyboard associated
* with this key through the attributes popupLayout and popupCharacters.
* @param popupKey the key that was long pressed
* @return true if the long press is handled, false otherwise. Subclasses should call the
* method on the base class if the subclass doesn't wish to handle the call.
*/
protected boolean onLongPress(Key popupKey) {
int popupKeyboardId = popupKey.popupResId;
if (popupKeyboardId != 0) {
mMiniKeyboardContainer = mMiniKeyboardCache.get(popupKey);
if (mMiniKeyboardContainer == null) {
LayoutInflater inflater = (LayoutInflater) getContext().getSystemService(
Context.LAYOUT_INFLATER_SERVICE);
mMiniKeyboardContainer = inflater.inflate(mPopupLayout, null);
mMiniKeyboard = (LatinKeyboardBaseView) mMiniKeyboardContainer.findViewById(
R.id.LatinKeyboardBaseView);
View closeButton = mMiniKeyboardContainer.findViewById(R.id.closeButton);
if (closeButton != null) closeButton.setOnClickListener(this);
mMiniKeyboard.setOnKeyboardActionListener(new OnKeyboardActionListener() {
public void onKey(int primaryCode, int[] keyCodes, int x, int y) {
mKeyboardActionListener.onKey(primaryCode, keyCodes, x, y);
dismissPopupKeyboard();
}
public void onText(CharSequence text) {
mKeyboardActionListener.onText(text);
dismissPopupKeyboard();
}
public void swipeLeft() { } public void swipeRight() { }
public void swipeUp() { }
public void swipeDown() { }
public void onPress(int primaryCode) {
mKeyboardActionListener.onPress(primaryCode);
}
public void onRelease(int primaryCode) {
mKeyboardActionListener.onRelease(primaryCode);
}
});
//mInputView.setSuggest(mSuggest);
Keyboard keyboard;
if (popupKey.popupCharacters != null) {
keyboard = new Keyboard(getContext(), popupKeyboardId,
popupKey.popupCharacters, -1, getPaddingLeft() + getPaddingRight());
} else {
keyboard = new Keyboard(getContext(), popupKeyboardId);
}
mMiniKeyboard.setKeyboard(keyboard);
mMiniKeyboard.setPopupParent(this);
mMiniKeyboardContainer.measure(
MeasureSpec.makeMeasureSpec(getWidth(), MeasureSpec.AT_MOST),
MeasureSpec.makeMeasureSpec(getHeight(), MeasureSpec.AT_MOST));
mMiniKeyboardCache.put(popupKey, mMiniKeyboardContainer);
} else {
mMiniKeyboard = (LatinKeyboardBaseView) mMiniKeyboardContainer.findViewById(
R.id.LatinKeyboardBaseView);
}
if (mWindowOffset == null) {
mWindowOffset = new int[2];
getLocationInWindow(mWindowOffset);
}
int popupX = popupKey.x + getPaddingLeft();
int popupY = popupKey.y + getPaddingTop();
popupX = popupX + popupKey.width - mMiniKeyboardContainer.getMeasuredWidth();
popupY = popupY - mMiniKeyboardContainer.getMeasuredHeight();
final int x = popupX + mMiniKeyboardContainer.getPaddingRight() + mWindowOffset[0];
final int y = popupY + mMiniKeyboardContainer.getPaddingBottom() + mWindowOffset[1];
mMiniKeyboard.setPopupOffset(x < 0 ? 0 : x, y);
mMiniKeyboard.setShifted(isShifted());
mPopupKeyboard.setContentView(mMiniKeyboardContainer);
mPopupKeyboard.setWidth(mMiniKeyboardContainer.getMeasuredWidth());
mPopupKeyboard.setHeight(mMiniKeyboardContainer.getMeasuredHeight());
mPopupKeyboard.showAtLocation(this, Gravity.NO_GRAVITY, x, y);
mMiniKeyboardOnScreen = true;
//mMiniKeyboard.onTouchEvent(getTranslatedEvent(me));
invalidateAllKeys();
return true;
}
return false;
}
// TODO: Should cleanup after refactoring mini-keyboard.
public boolean isMiniKeyboardOnScreen() {
return mMiniKeyboardOnScreen;
}
private int getTouchX(float x) {
return (int)x - getPaddingLeft();
}
private int getTouchY(float y) {
return (int)y + mVerticalCorrection - getPaddingTop();
}
private PointerTracker getPointerTracker(final int id) {
final ArrayList<PointerTracker> pointers = mPointerTrackers;
final Key[] keys = mKeys;
final OnKeyboardActionListener listener = mKeyboardActionListener;
// Create pointer trackers until we can get 'id+1'-th tracker, if needed.
for (int i = pointers.size(); i <= id; i++) {
final PointerTracker tracker =
new PointerTracker(mHandler, mProximityKeyDetector, this);
if (keys != null)
tracker.setKeyboard(keys, mDebounceHysteresis);
if (listener != null)
tracker.setOnKeyboardActionListener(listener);
pointers.add(tracker);
}
return pointers.get(id);
}
@Override
public boolean onTouchEvent(MotionEvent me) {
final int pointerCount = me.getPointerCount();
final int action = me.getActionMasked();
final long eventTime = me.getEventTime();
// Track the last few movements to look for spurious swipes.
mSwipeTracker.addMovement(me);
// We must disable gesture detector while mini-keyboard is on the screen.
if (!mMiniKeyboardOnScreen && mGestureDetector.onTouchEvent(me)) {
dismissKeyPreview();
mHandler.cancelKeyTimers();
return true;
}
// Needs to be called after the gesture detector gets a turn, as it may have
// displayed the mini keyboard
if (mMiniKeyboardOnScreen && action != MotionEvent.ACTION_CANCEL) {
return true;
}
if (mHandler.isInKeyRepeat()) {
// It'll be canceled if 2 or more keys are in action. Otherwise it will keep being in
// the key repeating mode while the key is being pressed.
if (pointerCount > 1) {
mHandler.cancelKeyRepeatTimer();
} else if (action == MotionEvent.ACTION_MOVE) {
return true;
}
// Up event will pass through.
}
if (action == MotionEvent.ACTION_MOVE) {
for (int index = 0; index < pointerCount; index++) {
int touchX = getTouchX(me.getX(index));
int touchY = getTouchY(me.getY(index));
int id = me.getPointerId(index);
PointerTracker tracker = getPointerTracker(id);
tracker.onMoveEvent(touchX, touchY, eventTime);
}
} else {
int index = me.getActionIndex();
int touchX = getTouchX(me.getX(index));
int touchY = getTouchY(me.getY(index));
int id = me.getPointerId(index);
PointerTracker tracker = getPointerTracker(id);
switch (action) {
case MotionEvent.ACTION_DOWN:
case MotionEvent.ACTION_POINTER_DOWN:
tracker.onDownEvent(touchX, touchY, eventTime);
break;
case MotionEvent.ACTION_UP:
case MotionEvent.ACTION_POINTER_UP:
tracker.onUpEvent(touchX, touchY, eventTime); break;
case MotionEvent.ACTION_CANCEL:
tracker.onCancelEvent(touchX, touchY, eventTime);
break;
}
}
return true;
}
protected void swipeRight() {
mKeyboardActionListener.swipeRight();
}
protected void swipeLeft() {
mKeyboardActionListener.swipeLeft();
}
protected void swipeUp() {
mKeyboardActionListener.swipeUp();
}
protected void swipeDown() {
mKeyboardActionListener.swipeDown();
}
public void closing() {
if (mPreviewPopup.isShowing()) {
mPreviewPopup.dismiss();
}
mHandler.cancelAllMessages();
dismissPopupKeyboard();
mBuffer = null;
mCanvas = null;
mMiniKeyboardCache.clear();
}
@Override
public void onDetachedFromWindow() {
super.onDetachedFromWindow();
closing();
}
public void dismissPopupKeyboard() {
if (mPopupKeyboard.isShowing()) {
mPopupKeyboard.dismiss();
mMiniKeyboardOnScreen = false;
invalidateAllKeys();
}
}
public boolean handleBack() {
if (mPopupKeyboard.isShowing()) {
dismissPopupKeyboard();
return true;
}
return false;
}
}