gecko/mobile/android/base/toolbar/BackButton.java

89 lines
3.0 KiB
Java

/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
package org.mozilla.gecko.toolbar;
import org.mozilla.gecko.R;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.LinearGradient;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.Shader;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.StateListDrawable;
import android.util.AttributeSet;
public class BackButton extends ShapedButton {
private final Path mBorderPath;
private final Paint mBorderPaint;
private final float mBorderWidth;
public BackButton(Context context, AttributeSet attrs) {
super(context, attrs);
mBorderWidth = getResources().getDimension(R.dimen.nav_button_border_width);
// Paint to draw the border.
mBorderPaint = new Paint();
mBorderPaint.setAntiAlias(true);
mBorderPaint.setStrokeWidth(mBorderWidth);
mBorderPaint.setStyle(Paint.Style.STROKE);
// Path is masked.
mBorderPath = new Path();
setPrivateMode(false);
}
@Override
public void setPrivateMode(boolean isPrivate) {
super.setPrivateMode(isPrivate);
mBorderPaint.setColor(isPrivate ? 0xFF363B40 : 0xFFB5B5B5);
}
@Override
protected void onSizeChanged(int width, int height, int oldWidth, int oldHeight) {
super.onSizeChanged(width, height, oldWidth, oldHeight);
mPath.reset();
mPath.addCircle(width/2, height/2, width/2, Path.Direction.CW);
mBorderPath.reset();
mBorderPath.addCircle(width/2, height/2, (width/2) - (mBorderWidth/2), Path.Direction.CW);
}
@Override
public void draw(Canvas canvas) {
mCanvasDelegate.draw(canvas, mPath, getWidth(), getHeight());
// Draw the border on top.
canvas.drawPath(mBorderPath, mBorderPaint);
}
// The drawable is constructed as per @drawable/url_bar_nav_button.
@Override
public void onLightweightThemeChanged() {
final Drawable drawable = mTheme.getDrawable(this);
if (drawable == null)
return;
final StateListDrawable stateList = new StateListDrawable();
stateList.addState(PRIVATE_PRESSED_STATE_SET, getColorDrawable(R.color.highlight_nav_pb));
stateList.addState(PRESSED_ENABLED_STATE_SET, getColorDrawable(R.color.highlight_nav));
stateList.addState(PRIVATE_FOCUSED_STATE_SET, getColorDrawable(R.color.highlight_nav_focused_pb));
stateList.addState(FOCUSED_STATE_SET, getColorDrawable(R.color.highlight_nav_focused));
stateList.addState(PRIVATE_STATE_SET, getColorDrawable(R.color.background_private));
stateList.addState(EMPTY_STATE_SET, drawable);
setBackgroundDrawable(stateList);
}
@Override
public void onLightweightThemeReset() {
setBackgroundResource(R.drawable.url_bar_nav_button);
}
}