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Diffstat (limited to 'src/com/android/launcher/BubbleTextView.java')
-rw-r--r-- | src/com/android/launcher/BubbleTextView.java | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/src/com/android/launcher/BubbleTextView.java b/src/com/android/launcher/BubbleTextView.java new file mode 100644 index 000000000..37824545e --- /dev/null +++ b/src/com/android/launcher/BubbleTextView.java @@ -0,0 +1,134 @@ +/* + * Copyright (C) 2008 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.launcher; + +import android.widget.TextView; +import android.content.Context; +import android.util.AttributeSet; +import android.graphics.Canvas; +import android.graphics.Paint; +import android.graphics.RectF; +import android.graphics.drawable.Drawable; +import android.text.Layout; + +/** + * TextView that draws a bubble behind the text. We cannot use a LineBackgroundSpan + * because we want to make the bubble taller than the text and TextView's clip is + * too aggressive. + */ +public class BubbleTextView extends TextView { + private static final float CORNER_RADIUS = 8.0f; + private static final float PADDING_H = 5.0f; + private static final float PADDING_V = 1.0f; + + private final RectF mRect = new RectF(); + private Paint mPaint; + + private boolean mBackgroundSizeChanged; + private Drawable mBackground; + private float mCornerRadius; + private float mPaddingH; + private float mPaddingV; + + public BubbleTextView(Context context) { + super(context); + init(); + } + + public BubbleTextView(Context context, AttributeSet attrs) { + super(context, attrs); + init(); + } + + public BubbleTextView(Context context, AttributeSet attrs, int defStyle) { + super(context, attrs, defStyle); + init(); + } + + private void init() { + setFocusable(true); + mBackground = getBackground(); + setBackgroundDrawable(null); + mBackground.setCallback(this); + + mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); + mPaint.setColor(getContext().getResources().getColor(R.color.bubble_dark_background)); + + final float scale = getContext().getResources().getDisplayMetrics().density; + mCornerRadius = CORNER_RADIUS * scale; + mPaddingH = PADDING_H * scale; + //noinspection PointlessArithmeticExpression + mPaddingV = PADDING_V * scale; + } + + @Override + protected boolean setFrame(int left, int top, int right, int bottom) { + if (mLeft != left || mRight != right || mTop != top || mBottom != bottom) { + mBackgroundSizeChanged = true; + } + return super.setFrame(left, top, right, bottom); + } + + @Override + protected boolean verifyDrawable(Drawable who) { + return who == mBackground || super.verifyDrawable(who); + } + + @Override + protected void drawableStateChanged() { + Drawable d = mBackground; + if (d != null && d.isStateful()) { + d.setState(getDrawableState()); + } + super.drawableStateChanged(); + } + + @Override + public void draw(Canvas canvas) { + final Drawable background = mBackground; + if (background != null) { + final int scrollX = mScrollX; + final int scrollY = mScrollY; + + if (mBackgroundSizeChanged) { + background.setBounds(0, 0, mRight - mLeft, mBottom - mTop); + mBackgroundSizeChanged = false; + } + + if ((scrollX | scrollY) == 0) { + background.draw(canvas); + } else { + canvas.translate(scrollX, scrollY); + background.draw(canvas); + canvas.translate(-scrollX, -scrollY); + } + } + + final Layout layout = getLayout(); + final RectF rect = mRect; + final int left = getCompoundPaddingLeft(); + final int top = getExtendedPaddingTop(); + + rect.set(left + layout.getLineLeft(0) - mPaddingH, + top + layout.getLineTop(0) - mPaddingV, + Math.min(left + layout.getLineRight(0) + mPaddingH, mScrollX + mRight - mLeft), + top + layout.getLineBottom(0) + mPaddingV); + canvas.drawRoundRect(rect, mCornerRadius, mCornerRadius, mPaint); + + super.draw(canvas); + } +} |