/*
* Copyright (C) 2009 Muthu Ramadoss. All rights reserved.
*
* Modified from Romain Guy Shelves project to suit Books-Exchange requirements.
* Original source from Shelves - http://code.google.com/p/shelves/
*/
/*
* Copyright (C) 2008 The Android Open Source Project, Romain Guy
*
* 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.androidrocks.bex.view;
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.Rect;
import android.graphics.drawable.Drawable;
import android.text.Layout;
import com.androidrocks.bex.R;
/**
* 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 = 14.0f;
private static final float PADDING_H = 10.0f;
private static final float PADDING_V = 5.0f;
private final RectF mRect = new RectF();
private Paint mPaint;
private Drawable mDrawableBottom;
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() {
mBackground = getBackground();
setBackgroundDrawable(null);
if (mBackground != null) mBackground.setCallback(this);
mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
mPaint.setColor(getContext().getResources().getColor(R.color.translucent_dark));
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 (getLeft() != left || getRight() != right || getTop() != top || getBottom() != bottom) {
mBackgroundSizeChanged = true;
}
return super.setFrame(left, top, right, bottom);
}
@Override
protected boolean verifyDrawable(Drawable who) {
return mDrawableBottom == who || 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 = getScrollX();
final int scrollY = getScrollY();
if (mBackgroundSizeChanged) {
background.setBounds(0, 0, getWidth(), getHeight());
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),
getScrollX() + getWidth() - getCompoundPaddingRight()) + mPaddingH,
top + layout.getLineBottom(0) + mPaddingV);
canvas.drawRoundRect(rect, mCornerRadius, mCornerRadius, mPaint);
super.draw(canvas);
}
@Override
public void setCompoundDrawablesWithIntrinsicBounds(Drawable left, Drawable top,
Drawable right, Drawable bottom) {
super.setCompoundDrawablesWithIntrinsicBounds(left, top, right, bottom);
mDrawableBottom = bottom;
}
@Override
public void invalidateDrawable(Drawable drawable) {
if (mDrawableBottom == drawable) {
final Rect dirty = drawable.getBounds();
// Assume paddingLeft == paddingRight
final int drawableWidth = dirty.right - dirty.left;
final int left = (getWidth() - drawableWidth) / 2 + getScrollX();
// Assume we draw the bottom drawable at the bottom
final int drawableHeight = dirty.bottom - dirty.top;
final int top = getHeight() - getPaddingBottom() - drawableHeight + getScrollY();
invalidate(left, top, left + drawableWidth, top + drawableHeight);
} else {
super.invalidateDrawable(drawable);
}
}
}