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/*
* 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.cyanogenmod.trebuchet;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.PorterDuff;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.widget.TextView;
import com.cyanogenmod.trebuchet.R;
/**
* This class adds a stroke to the generic TextView allowing the text to stand out better against
* the background (ie. in the AllApps button).
*/
public class StrokedTextView extends TextView {
private final Canvas mCanvas = new Canvas();
private final Paint mPaint = new Paint();
private Bitmap mCache;
private boolean mUpdateCachedBitmap;
private int mStrokeColor;
private float mStrokeWidth;
private int mTextColor;
public StrokedTextView(Context context) {
super(context);
init(context, null, 0);
}
public StrokedTextView(Context context, AttributeSet attrs) {
super(context, attrs);
init(context, attrs, 0);
}
public StrokedTextView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
init(context, attrs, defStyle);
}
private void init(Context context, AttributeSet attrs, int defStyle) {
TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.StrokedTextView,
defStyle, 0);
mStrokeColor = a.getColor(R.styleable.StrokedTextView_strokeColor, 0xFF000000);
mStrokeWidth = a.getFloat(R.styleable.StrokedTextView_strokeWidth, 0.0f);
mTextColor = a.getColor(R.styleable.StrokedTextView_strokeTextColor, 0xFFFFFFFF);
a.recycle();
mUpdateCachedBitmap = true;
// Setup the text paint
mPaint.setAntiAlias(true);
mPaint.setStyle(Paint.Style.FILL_AND_STROKE);
}
protected void onTextChanged(CharSequence text, int start, int before, int after) {
super.onTextChanged(text, start, before, after);
mUpdateCachedBitmap = true;
}
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
if (w > 0 && h > 0) {
mUpdateCachedBitmap = true;
mCache = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);
} else {
mCache = null;
}
}
protected void onDraw(Canvas canvas) {
if (mCache != null) {
if (mUpdateCachedBitmap) {
final int w = getMeasuredWidth();
final int h = getMeasuredHeight();
final String text = getText().toString();
final Rect textBounds = new Rect();
final Paint textPaint = getPaint();
final int textWidth = (int) textPaint.measureText(text);
textPaint.getTextBounds("x", 0, 1, textBounds);
// Clear the old cached image
mCanvas.setBitmap(mCache);
mCanvas.drawColor(0, PorterDuff.Mode.CLEAR);
// Draw the drawable
final int drawableLeft = getPaddingLeft();
final int drawableTop = getPaddingTop();
final Drawable[] drawables = getCompoundDrawables();
for (int i = 0; i < drawables.length; ++i) {
if (drawables[i] != null) {
drawables[i].setBounds(drawableLeft, drawableTop,
drawableLeft + drawables[i].getIntrinsicWidth(),
drawableTop + drawables[i].getIntrinsicHeight());
drawables[i].draw(mCanvas);
}
}
final int left = w - getPaddingRight() - textWidth;
final int bottom = (h + textBounds.height()) / 2;
// Draw the outline of the text
mPaint.setStrokeWidth(mStrokeWidth);
mPaint.setColor(mStrokeColor);
mPaint.setTextSize(getTextSize());
mCanvas.drawText(text, left, bottom, mPaint);
// Draw the text itself
mPaint.setStrokeWidth(0);
mPaint.setColor(mTextColor);
mCanvas.drawText(text, left, bottom, mPaint);
mUpdateCachedBitmap = false;
}
canvas.drawBitmap(mCache, 0, 0, mPaint);
} else {
super.onDraw(canvas);
}
}
}
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