/* * Copyright (C) 2013 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.keyboard.internal; import android.content.res.TypedArray; import android.graphics.Canvas; import android.graphics.Paint; import android.graphics.Path; import android.view.View; import com.android.inputmethod.keyboard.PointerTracker; import com.android.inputmethod.latin.R; import com.android.inputmethod.latin.utils.CoordinateUtils; /** * Draw rubber band preview graphics during sliding key input. */ public final class SlidingKeyInputDrawingPreview extends AbstractDrawingPreview { private final float mPreviewBodyRadius; private boolean mShowsSlidingKeyInputPreview; private final int[] mPreviewFrom = CoordinateUtils.newInstance(); private final int[] mPreviewTo = CoordinateUtils.newInstance(); // TODO: Finalize the rubber band preview implementation. private final RoundedLine mRoundedLine = new RoundedLine(); private final Paint mPaint = new Paint(); public SlidingKeyInputDrawingPreview(final View drawingView, final TypedArray mainKeyboardViewAttr) { super(drawingView); final int previewColor = mainKeyboardViewAttr.getColor( R.styleable.MainKeyboardView_slidingKeyInputPreviewColor, 0); final float previewRadius = mainKeyboardViewAttr.getDimension( R.styleable.MainKeyboardView_slidingKeyInputPreviewWidth, 0) / 2.0f; final int PERCENTAGE_INT = 100; final float previewBodyRatio = (float)mainKeyboardViewAttr.getInt( R.styleable.MainKeyboardView_slidingKeyInputPreviewBodyRatio, PERCENTAGE_INT) / (float)PERCENTAGE_INT; mPreviewBodyRadius = previewRadius * previewBodyRatio; final int previewShadowRatioInt = mainKeyboardViewAttr.getInt( R.styleable.MainKeyboardView_slidingKeyInputPreviewShadowRatio, 0); if (previewShadowRatioInt > 0) { final float previewShadowRatio = (float)previewShadowRatioInt / (float)PERCENTAGE_INT; final float shadowRadius = previewRadius * previewShadowRatio; mPaint.setShadowLayer(shadowRadius, 0.0f, 0.0f, previewColor); } mPaint.setColor(previewColor); } @Override public void onDeallocateMemory() { // Nothing to do here. } public void dismissSlidingKeyInputPreview() { mShowsSlidingKeyInputPreview = false; getDrawingView().invalidate(); } /** * Draws the preview * @param canvas The canvas where the preview is drawn. */ @Override public void drawPreview(final Canvas canvas) { if (!isPreviewEnabled() || !mShowsSlidingKeyInputPreview) { return; } // TODO: Finalize the rubber band preview implementation. final float radius = mPreviewBodyRadius; final Path path = mRoundedLine.makePath( CoordinateUtils.x(mPreviewFrom), CoordinateUtils.y(mPreviewFrom), radius, CoordinateUtils.x(mPreviewTo), CoordinateUtils.y(mPreviewTo), radius); canvas.drawPath(path, mPaint); } /** * Set the position of the preview. * @param tracker The new location of the preview is based on the points in PointerTracker. */ @Override public void setPreviewPosition(final PointerTracker tracker) { tracker.getDownCoordinates(mPreviewFrom); tracker.getLastCoordinates(mPreviewTo); mShowsSlidingKeyInputPreview = true; getDrawingView().invalidate(); } }