diff options
Diffstat (limited to 'src/com/android/launcher3/widget/WidgetImageView.java')
-rw-r--r-- | src/com/android/launcher3/widget/WidgetImageView.java | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/src/com/android/launcher3/widget/WidgetImageView.java b/src/com/android/launcher3/widget/WidgetImageView.java new file mode 100644 index 000000000..b0fbe1ed9 --- /dev/null +++ b/src/com/android/launcher3/widget/WidgetImageView.java @@ -0,0 +1,97 @@ +/* + * Copyright (C) 2011 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.launcher3.widget; + +import android.content.Context; +import android.graphics.Bitmap; +import android.graphics.Canvas; +import android.graphics.Paint; +import android.graphics.Rect; +import android.graphics.RectF; +import android.util.AttributeSet; +import android.view.View; + +/** + * View that draws a bitmap horizontally centered. If the image width is greater than the view + * width, the image is scaled down appropriately. + */ +public class WidgetImageView extends View { + + private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG | Paint.FILTER_BITMAP_FLAG); + private final RectF mDstRectF = new RectF(); + private Bitmap mBitmap; + + public WidgetImageView(Context context) { + super(context); + } + + public WidgetImageView(Context context, AttributeSet attrs) { + super(context, attrs); + } + + public WidgetImageView(Context context, AttributeSet attrs, int defStyle) { + super(context, attrs, defStyle); + } + + public void setBitmap(Bitmap bitmap) { + mBitmap = bitmap; + invalidate(); + } + + public Bitmap getBitmap() { + return mBitmap; + } + + @Override + protected void onDraw(Canvas canvas) { + if (mBitmap != null) { + updateDstRectF(); + canvas.drawBitmap(mBitmap, null, mDstRectF, mPaint); + } + } + + /** + * Prevents the inefficient alpha view rendering. + */ + @Override + public boolean hasOverlappingRendering() { + return false; + } + + private void updateDstRectF() { + if (mBitmap.getWidth() > getWidth()) { + float scale = ((float) getWidth()) / mBitmap.getWidth(); + mDstRectF.set(0, 0, getWidth(), scale * mBitmap.getHeight()); + } else { + mDstRectF.set( + (getWidth() - mBitmap.getWidth()) * 0.5f, + 0, + (getWidth() + mBitmap.getWidth()) * 0.5f, + mBitmap.getHeight()); + } + } + + /** + * @return the bounds where the image was drawn. + */ + public Rect getBitmapBounds() { + updateDstRectF(); + Rect rect = new Rect(); + mDstRectF.round(rect); + return rect; + } +} |