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/*
* Copyright (c) 2016, The Linux Foundation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
* * Neither the name of The Linux Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package com.android.camera.ui;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.view.View;
public class DotsView extends View {
private Paint mTargetPaint;
private int mPosition;
private float mPositionOffset;
private DotsViewItem mItems;
public DotsView(Context context, AttributeSet attrs) {
super(context, attrs);
mTargetPaint = new Paint();
mTargetPaint.setColor(Color.WHITE);
mTargetPaint.setStyle(Paint.Style.FILL_AND_STROKE);
}
public void update(int position, float positionOffest) {
mPosition = position;
mPositionOffset = positionOffest;
invalidate();
}
public void setItems(DotsViewItem item) {
mItems = item;
}
public void update() {
invalidate();
}
@Override
public void onDraw(Canvas canvas) {
if(mItems == null) {
return;
}
int dx = canvas.getWidth()/(mItems.getTotalItemNums()+1);
int dy = canvas.getHeight()/(mItems.getTotalItemNums()+1);
int y = canvas.getHeight()/2;
float radius = Math.min(dx, dy)/2f;
for(int i=0; i < mItems.getTotalItemNums(); i++) {
if(i-1 == mPosition && mPositionOffset > 0f) {
drawDot(canvas, (i + 1) * dx, y, radius + radius * mPositionOffset, mItems.isChosen(i));
} else if(i+1 == mPosition && mPositionOffset < 0f) {
drawDot(canvas, (i + 1) * dx, y, radius - radius*mPositionOffset, mItems.isChosen(i));
} else if(i == mPosition) {
drawDot(canvas, (i + 1) * dx, y, radius + radius * (1 - Math.abs(mPositionOffset)), mItems.isChosen(i));
} else {
drawDot(canvas, (i + 1) * dx, y, radius, mItems.isChosen(i));
}
}
}
private void drawDot(Canvas canvas, float cx, float cy, float radius, boolean isChosen) {
if(isChosen) {
mTargetPaint.setStyle(Paint.Style.FILL_AND_STROKE);
canvas.drawCircle(cx, cy, radius, mTargetPaint);
} else {
mTargetPaint.setStyle(Paint.Style.STROKE);
canvas.drawCircle(cx, cy, radius, mTargetPaint);
}
}
}
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