/*
* Copyright (C) 2012 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.camera.drawable;
import android.content.res.Resources;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.ColorFilter;
import android.graphics.Paint;
import android.graphics.Typeface;
import android.graphics.Paint.Align;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.util.TypedValue;
public class TextDrawable extends Drawable {
private static final int DEFAULT_COLOR = Color.WHITE;
private static final int DEFAULT_TEXTSIZE = 15;
private Paint mPaint;
private CharSequence mText;
private int mIntrinsicWidth;
private int mIntrinsicHeight;
private boolean mUseDropShadow;
public TextDrawable(Resources res) {
this(res, "");
}
public TextDrawable(Resources res, CharSequence text) {
mText = text;
updatePaint();
float textSize = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP,
DEFAULT_TEXTSIZE, res.getDisplayMetrics());
mPaint.setTextSize(textSize);
mIntrinsicWidth = (int) (mPaint.measureText(mText, 0, mText.length()) + .5);
mIntrinsicHeight = mPaint.getFontMetricsInt(null);
}
private void updatePaint() {
if (mPaint == null) {
mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
}
mPaint.setColor(DEFAULT_COLOR);
mPaint.setTextAlign(Align.CENTER);
if (mUseDropShadow) {
mPaint.setTypeface(Typeface.DEFAULT_BOLD);
mPaint.setShadowLayer(10, 0, 0, 0xff000000);
} else {
mPaint.setTypeface(Typeface.DEFAULT);
mPaint.setShadowLayer(0, 0, 0, 0);
}
}
public void setText(CharSequence txt) {
mText = txt;
if (txt == null) {
mIntrinsicWidth = 0;
mIntrinsicHeight = 0;
} else {
mIntrinsicWidth = (int) (mPaint.measureText(mText, 0, mText.length()) + .5);
mIntrinsicHeight = mPaint.getFontMetricsInt(null);
}
}
@Override
public void draw(Canvas canvas) {
if (mText != null) {
Rect bounds = getBounds();
canvas.drawText(mText, 0, mText.length(),
bounds.centerX(), bounds.centerY(), mPaint);
}
}
public void setDropShadow(boolean shadow) {
mUseDropShadow = shadow;
updatePaint();
}
@Override
public int getOpacity() {
return mPaint.getAlpha();
}
@Override
public int getIntrinsicWidth() {
return mIntrinsicWidth;
}
@Override
public int getIntrinsicHeight() {
return mIntrinsicHeight;
}
@Override
public void setAlpha(int alpha) {
mPaint.setAlpha(alpha);
}
@Override
public void setColorFilter(ColorFilter filter) {
mPaint.setColorFilter(filter);
}
}