Android实例之[Android实例] Android 竖着的SeekBar

package com.pulque; /* *Author: tanrui *Date: 20/1/2010 */ import android.content.Context; import android.graphics.Canvas; import android.graphics.Rect; import android.graphics.drawable.Drawable; import android.util.AttributeSet; import android.util.Log; import android.view.KeyEvent; import android.view.MotionEvent; import android.view.View; import android.widget.AbsSeekBar; public class SeekBar extends AbsSeekBar { private Drawable mThumb; private int height; private int width; public interface OnSeekBarChangeListener { void onProgressChanged(SeekBar VerticalSeekBar, int progress, boolean fromUser); void onStartTrackingTouch(SeekBar VerticalSeekBar); void onStopTrackingTouch(SeekBar VerticalSeekBar); } private OnSeekBarChangeListener mOnSeekBarChangeListener; public SeekBar(Context context) { this(context, null); } public SeekBar(Context context, AttributeSet attrs) { this(context, attrs, android.R.attr.seekBarStyle); } public SeekBar(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); } public void setOnSeekBarChangeListener(OnSeekBarChangeListener l) { mOnSeekBarChangeListener = l; } void onStartTrackingTouch() { if (mOnSeekBarChangeListener != null) { mOnSeekBarChangeListener.onStartTrackingTouch(this); } } void onStopTrackingTouch() { if (mOnSeekBarChangeListener != null) { mOnSeekBarChangeListener.onStopTrackingTouch(this); } } void onProgressRefresh(float scale, boolean fromUser) { Log.e("6", "onProgressRefresh==>scale"+scale); Drawable thumb = mThumb; if (thumb != null) { setThumbPos(getHeight(), thumb, scale, Integer.MIN_VALUE); invalidate(); } if (mOnSeekBarChangeListener != null) { mOnSeekBarChangeListener.onProgressChanged(this, getProgress(), fromUser); } } private void setThumbPos(int w, Drawable thumb, float scale, int gap) { Log.e("6", "setThumbPos==>w"+w); int available = w + getPaddingLeft() - getPaddingRight(); int thumbWidth = thumb.getIntrinsicWidth(); int thumbHeight = thumb.getIntrinsicHeight(); available -= thumbWidth; // The extra space for the thumb to move on the track available += getThumbOffset() * 2; int thumbPos = (int) (scale * available); int topBound, bottomBound; if (gap == Integer.MIN_VALUE) { Rect oldBounds = thumb.getBounds(); topBound = oldBounds.top; bottomBound = oldBounds.bottom; } else { topBound = gap; bottomBound = gap + thumbHeight; } thumb.setBounds(thumbPos, topBound, thumbPos + thumbWidth, bottomBound); } protected void onDraw(Canvas c) { Log.e("6", "onDraw==>height"+height); c.rotate(90); c.translate(0, -width); super.onDraw(c); } protected synchronized void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { // width = 200; // height = 120; height = View.MeasureSpec.getSize(heightMeasureSpec); width = View.MeasureSpec.getSize(widthMeasureSpec); Log.e("6", "onMeasure==>height,,width"+height+" "+width); this.setMeasuredDimension(width, height); } @Override public void setThumb(Drawable thumb) { mThumb = thumb; super.setThumb(thumb); } protected void onSizeChanged(int w, int h, int oldw, int oldh) { Log.e("6", "onSizeChanged==>w,,h,,oldw,,oldh"+w+" "+h+" "+oldw+" "+oldh); super.onSizeChanged(h, w, oldw, oldh); } public boolean onTouchEvent(MotionEvent event) { if (!isEnabled()) { return false; } switch (event.getAction()) { case MotionEvent.ACTION_DOWN: setPressed(true); onStartTrackingTouch(); trackTouchEvent(event); break; case MotionEvent.ACTION_MOVE: trackTouchEvent(event); attemptClaimDrag(); break; case MotionEvent.ACTION_UP: trackTouchEvent(event); onStopTrackingTouch(); setPressed(false); break; case MotionEvent.ACTION_CANCEL: onStopTrackingTouch(); setPressed(false); break; } return true; } private void trackTouchEvent(MotionEvent event) { final int Height = getHeight(); Log.e("6", "trackTouchEvent==>Height"+Height); final int available = Height - getPaddingBottom() - getPaddingTop(); int Y = (int) event.getY(); Log.e("6", "trackTouchEvent==>Y"+Y); float scale; float progress = 0; if (Y > Height - getPaddingBottom()) { scale = 1.0f; } else if (Y < getPaddingTop()) { scale = 0.0f; } else { scale = (float) (Y) / (float) available; } final int max = getMax(); progress = scale * max; setProgress((int) progress); } private void attemptClaimDrag() { if (getParent() != null) { getParent().requestDisallowInterceptTouchEvent(true); } } public boolean dispatchKeyEvent(KeyEvent event) { if (event.getAction() == KeyEvent.ACTION_DOWN) { KeyEvent newEvent = null; switch (event.getKeyCode()) { case KeyEvent.KEYCODE_DPAD_UP: newEvent = new KeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_DPAD_RIGHT); break; case KeyEvent.KEYCODE_DPAD_DOWN: newEvent = new KeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_DPAD_LEFT); break; case KeyEvent.KEYCODE_DPAD_LEFT: newEvent = new KeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_DPAD_DOWN); break; case KeyEvent.KEYCODE_DPAD_RIGHT: newEvent = new KeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_DPAD_UP); break; default: newEvent = new KeyEvent(KeyEvent.ACTION_DOWN, event .getKeyCode()); break; } return newEvent.dispatch(this); } return false; } }