ColorButton.java :  » UnTagged » zebra-paint » com » dornbachs » zebra » Android Open Source

/*
 * Copyright (C) 2010 Peter Dornbach.
 * 
 * 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.dornbachs.zebra;

import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.drawable.GradientDrawable;
import android.graphics.drawable.GradientDrawable.Orientation;
import android.util.AttributeSet;

public class ColorButton extends ZebraButton {
  public static final int PADDING_NORMAL_PERCENT = 20;
  public static final int PADDING_PUSHED_PERCENT = 10;
  public static final int PADDING_SELECTED_PERCENT = 12;

  public static final int INSET_HIGHLIGHT_PERCENT = 5;

  public ColorButton(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);

    TypedArray a = context.obtainStyledAttributes(attrs,
        R.styleable.ColorButton, defStyle, 0);
    _color = a.getColor(R.styleable.ColorButton_color, Color.RED);

    _highlightDrawable = new GradientDrawable(Orientation.TOP_BOTTOM,
        new int[] { Color.WHITE, Color.TRANSPARENT, Color.TRANSPARENT });
    _highlightDrawable.setShape(GradientDrawable.OVAL);
    _colorDrawable = new GradientDrawable();
    _colorDrawable.setColor(_color);
    _colorDrawable.setShape(GradientDrawable.OVAL);
  }

  public ColorButton(Context context, AttributeSet attrs) {
    this(context, attrs, R.attr.colorButtonStyle);
  }

  public ColorButton(Context context) {
    this(context, null);
  }

  public void setSelected(boolean selected) {
    if (_selected != selected) {
      _selected = selected;
      invalidate();
    }
  }

  public int getColor() {
    return _color;
  }

  public void setColor(int color) {
    if (color != _color) {
      _color = color;
      _colorDrawable.setColor(_color);
      invalidate();
    }
  }

  protected void onDraw(Canvas canvas) {
    boolean pushedDown = isPushedDown();

    final int w = getWidth();
    final int h = getHeight();
    final int minwh = Math.min(w, h);

    int i = minwh * INSET_HIGHLIGHT_PERCENT / 100;
    int p = 0;
    if (pushedDown) {
      p = minwh * PADDING_PUSHED_PERCENT / 100;
    } else {
      if (_selected) {
        p = minwh * PADDING_SELECTED_PERCENT / 100;
      } else {
        p = minwh * PADDING_NORMAL_PERCENT / 100;
      }
    }

    _colorDrawable.setBounds(p, p, w - p, h - p);
    _colorDrawable.draw(canvas);
    _highlightDrawable.setBounds(p + i, p + i, w - p - i, h - p - i);
    _highlightDrawable.draw(canvas);
  }

  private boolean _selected;

  private int _color;

  private GradientDrawable _colorDrawable;
  private GradientDrawable _highlightDrawable;
}