1 /* 2 * Copyright (C) 2012 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.inputmethod.keyboard.internal; 18 19 import android.graphics.Canvas; 20 import android.view.View; 21 22 import com.android.inputmethod.keyboard.PointerTracker; 23 24 /** 25 * Abstract base class for previews that are drawn on PreviewPlacerView, e.g., 26 * GestureFloatingPrevewText, GestureTrail, and SlidingKeyInputPreview. 27 */ 28 public abstract class AbstractDrawingPreview { 29 private final View mDrawingView; 30 private boolean mPreviewEnabled; 31 AbstractDrawingPreview(final View drawingView)32 protected AbstractDrawingPreview(final View drawingView) { 33 mDrawingView = drawingView; 34 } 35 getDrawingView()36 public final View getDrawingView() { 37 return mDrawingView; 38 } 39 setPreviewEnabled(final boolean enabled)40 public final void setPreviewEnabled(final boolean enabled) { 41 mPreviewEnabled = enabled; 42 } 43 isPreviewEnabled()44 public boolean isPreviewEnabled() { 45 return mPreviewEnabled; 46 } 47 setKeyboardGeometry(final int[] originCoords, final int width, final int height)48 public void setKeyboardGeometry(final int[] originCoords, final int width, final int height) { 49 // Default implementation is empty. 50 } 51 onDetachFromWindow()52 public void onDetachFromWindow() { 53 // Default implementation is empty. 54 } 55 56 /** 57 * Draws the preview 58 * @param canvas The canvas where the preview is drawn. 59 */ drawPreview(final Canvas canvas)60 public abstract void drawPreview(final Canvas canvas); 61 62 /** 63 * Set the position of the preview. 64 * @param tracker The new location of the preview is based on the points in PointerTracker. 65 */ setPreviewPosition(final PointerTracker tracker)66 public abstract void setPreviewPosition(final PointerTracker tracker); 67 } 68