107 lines
4.2 KiB
Java
107 lines
4.2 KiB
Java
/*
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* Copyright (C) 2013 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.inputmethod.keyboard.internal;
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import android.content.res.TypedArray;
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import android.graphics.Canvas;
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import android.graphics.Paint;
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import android.graphics.Path;
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import com.android.inputmethod.keyboard.PointerTracker;
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import com.android.inputmethod.latin.R;
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import com.android.inputmethod.latin.common.CoordinateUtils;
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/**
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* Draw rubber band preview graphics during sliding key input.
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*
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* @attr ref R.styleable#MainKeyboardView_slidingKeyInputPreviewColor
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* @attr ref R.styleable#MainKeyboardView_slidingKeyInputPreviewWidth
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* @attr ref R.styleable#MainKeyboardView_slidingKeyInputPreviewBodyRatio
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* @attr ref R.styleable#MainKeyboardView_slidingKeyInputPreviewShadowRatio
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*/
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public final class SlidingKeyInputDrawingPreview extends AbstractDrawingPreview {
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private final float mPreviewBodyRadius;
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private boolean mShowsSlidingKeyInputPreview;
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private final int[] mPreviewFrom = CoordinateUtils.newInstance();
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private final int[] mPreviewTo = CoordinateUtils.newInstance();
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// TODO: Finalize the rubber band preview implementation.
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private final RoundedLine mRoundedLine = new RoundedLine();
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private final Paint mPaint = new Paint();
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public SlidingKeyInputDrawingPreview(final TypedArray mainKeyboardViewAttr) {
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final int previewColor = mainKeyboardViewAttr.getColor(
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R.styleable.MainKeyboardView_slidingKeyInputPreviewColor, 0);
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final float previewRadius = mainKeyboardViewAttr.getDimension(
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R.styleable.MainKeyboardView_slidingKeyInputPreviewWidth, 0) / 2.0f;
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final int PERCENTAGE_INT = 100;
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final float previewBodyRatio = (float)mainKeyboardViewAttr.getInt(
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R.styleable.MainKeyboardView_slidingKeyInputPreviewBodyRatio, PERCENTAGE_INT)
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/ (float)PERCENTAGE_INT;
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mPreviewBodyRadius = previewRadius * previewBodyRatio;
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final int previewShadowRatioInt = mainKeyboardViewAttr.getInt(
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R.styleable.MainKeyboardView_slidingKeyInputPreviewShadowRatio, 0);
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if (previewShadowRatioInt > 0) {
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final float previewShadowRatio = (float)previewShadowRatioInt / (float)PERCENTAGE_INT;
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final float shadowRadius = previewRadius * previewShadowRatio;
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mPaint.setShadowLayer(shadowRadius, 0.0f, 0.0f, previewColor);
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}
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mPaint.setColor(previewColor);
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}
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@Override
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public void onDeallocateMemory() {
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// Nothing to do here.
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}
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public void dismissSlidingKeyInputPreview() {
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mShowsSlidingKeyInputPreview = false;
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invalidateDrawingView();
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}
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/**
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* Draws the preview
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* @param canvas The canvas where the preview is drawn.
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*/
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@Override
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public void drawPreview(final Canvas canvas) {
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if (!isPreviewEnabled() || !mShowsSlidingKeyInputPreview) {
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return;
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}
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// TODO: Finalize the rubber band preview implementation.
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final float radius = mPreviewBodyRadius;
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final Path path = mRoundedLine.makePath(
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CoordinateUtils.x(mPreviewFrom), CoordinateUtils.y(mPreviewFrom), radius,
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CoordinateUtils.x(mPreviewTo), CoordinateUtils.y(mPreviewTo), radius);
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canvas.drawPath(path, mPaint);
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}
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/**
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* Set the position of the preview.
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* @param tracker The new location of the preview is based on the points in PointerTracker.
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*/
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@Override
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public void setPreviewPosition(final PointerTracker tracker) {
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tracker.getDownCoordinates(mPreviewFrom);
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tracker.getLastCoordinates(mPreviewTo);
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mShowsSlidingKeyInputPreview = true;
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invalidateDrawingView();
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}
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}
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