public class VerticalTextSpinner extends View {
private static final int SELECTOR_ARROW_HEIGHT = 15;
-
+
private static final int TEXT_SPACING = 18;
private static final int TEXT_MARGIN_RIGHT = 25;
private static final int TEXT_SIZE = 22;
-
+
/* Keep the calculations as this is really a for loop from
* -2 to 2 but precalculated so we don't have to do in the onDraw.
*/
private static final int TEXT3_Y = (TEXT_SIZE * (0 + 2)) + (TEXT_SPACING * (0 + 1));
private static final int TEXT4_Y = (TEXT_SIZE * (1 + 2)) + (TEXT_SPACING * (1 + 1));
private static final int TEXT5_Y = (TEXT_SIZE * (2 + 2)) + (TEXT_SPACING * (2 + 1));
-
+
private static final int SCROLL_MODE_NONE = 0;
private static final int SCROLL_MODE_UP = 1;
private static final int SCROLL_MODE_DOWN = 2;
-
+
private static final long DEFAULT_SCROLL_INTERVAL_MS = 400;
private static final int SCROLL_DISTANCE = TEXT_SIZE + TEXT_SPACING;
private static final int MIN_ANIMATIONS = 4;
-
+
private final Drawable mBackgroundFocused;
private final Drawable mSelectorFocused;
private final Drawable mSelectorNormal;
private final int mSelectorHeight;
private final TextPaint mTextPaintDark;
private final TextPaint mTextPaintLight;
-
+
private int mSelectorY;
private Drawable mSelector;
private int mDownY;
private boolean mIsAnimationRunning;
private boolean mStopAnimation;
private boolean mWrapAround = true;
-
+
private int mTotalAnimatedDistance;
private int mNumberOfAnimations;
private long mDelayBetweenAnimations;
private int mDistanceOfEachAnimation;
-
+
private String[] mTextList;
private int mCurrentSelectedPos;
private OnChangedListener mListener;
-
+
private String mText1;
private String mText2;
private String mText3;
private String mText4;
private String mText5;
-
+
public interface OnChangedListener {
void onChanged(
VerticalTextSpinner spinner, int oldPos, int newPos, String[] items);
}
-
+
public VerticalTextSpinner(Context context) {
this(context, null);
}
-
+
public VerticalTextSpinner(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public VerticalTextSpinner(Context context, AttributeSet attrs,
int defStyle) {
super(context, attrs, defStyle);
-
- mBackgroundFocused = context.getResources().getDrawable(com.android.internal.R.drawable.pickerbox_background);
- mSelectorFocused = context.getResources().getDrawable(com.android.internal.R.drawable.pickerbox_selected);
- mSelectorNormal = context.getResources().getDrawable(com.android.internal.R.drawable.pickerbox_unselected);
-
+
+ mBackgroundFocused = context.getResources().getDrawable(R.drawable.pickerbox_background);
+ mSelectorFocused = context.getResources().getDrawable(R.drawable.pickerbox_selected);
+ mSelectorNormal = context.getResources().getDrawable(R.drawable.pickerbox_unselected);
+
mSelectorHeight = mSelectorFocused.getIntrinsicHeight();
mSelectorDefaultY = (mBackgroundFocused.getIntrinsicHeight() - mSelectorHeight) / 2;
mSelectorMinY = 0;
mSelectorMaxY = mBackgroundFocused.getIntrinsicHeight() - mSelectorHeight;
-
+
mSelector = mSelectorNormal;
mSelectorY = mSelectorDefaultY;
-
+
mTextPaintDark = new TextPaint(Paint.ANTI_ALIAS_FLAG);
mTextPaintDark.setTextSize(TEXT_SIZE);
- mTextPaintDark.setColor(context.getResources().getColor(com.android.internal.R.color.primary_text_light));
-
+ mTextPaintDark.setColor(context.getResources()
+ .getColor(android.R.color.primary_text_light));
+
mTextPaintLight = new TextPaint(Paint.ANTI_ALIAS_FLAG);
mTextPaintLight.setTextSize(TEXT_SIZE);
- mTextPaintLight.setColor(context.getResources().getColor(com.android.internal.R.color.secondary_text_dark));
-
+ mTextPaintLight.setColor(context.getResources()
+ .getColor(android.R.color.secondary_text_dark));
+
mScrollMode = SCROLL_MODE_NONE;
mScrollInterval = DEFAULT_SCROLL_INTERVAL_MS;
calculateAnimationValues();
}
-
+
public void setOnChangeListener(OnChangedListener listener) {
mListener = listener;
}
-
+
public void setItems(String[] textList) {
mTextList = textList;
calculateTextPositions();
}
-
+
public void setSelectedPos(int selectedPos) {
mCurrentSelectedPos = selectedPos;
calculateTextPositions();
postInvalidate();
}
-
+
public void setScrollInterval(long interval) {
mScrollInterval = interval;
calculateAnimationValues();
}
-
+
public void setWrapAround(boolean wrap) {
mWrapAround = wrap;
}
-
+
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
-
+
/* This is a bit confusing, when we get the key event
* DPAD_DOWN we actually roll the spinner up. When the
* key event is DPAD_UP we roll the spinner down.
private boolean canScrollUp() {
return ((mCurrentSelectedPos < (mTextList.length - 1)) || mWrapAround);
}
-
+
@Override
protected void onFocusChanged(boolean gainFocus, int direction,
Rect previouslyFocusedRect) {
mSelectorY = mSelectorDefaultY;
}
}
-
+
@Override
- public boolean onTouchEvent(MotionEvent event) {
+ public boolean onTouchEvent(MotionEvent event) {
final int action = event.getAction();
final int y = (int) event.getY();
case MotionEvent.ACTION_DOWN:
requestFocus();
mDownY = y;
- isDraggingSelector = (y >= mSelectorY) && (y <= (mSelectorY + mSelector.getIntrinsicHeight()));
+ isDraggingSelector = (y >= mSelectorY) &&
+ (y <= (mSelectorY + mSelector.getIntrinsicHeight()));
break;
case MotionEvent.ACTION_MOVE:
}
}
break;
-
+
case MotionEvent.ACTION_UP:
case MotionEvent.ACTION_CANCEL:
default:
}
return true;
}
-
+
@Override
protected void onDraw(Canvas canvas) {
-
+
/* The bounds of the selector */
final int selectorLeft = 0;
final int selectorTop = mSelectorY;
- final int selectorRight = mMeasuredWidth;
+ final int selectorRight = getMeasuredWidth();
final int selectorBottom = mSelectorY + mSelectorHeight;
-
+
/* Draw the selector */
mSelector.setBounds(selectorLeft, selectorTop, selectorRight, selectorBottom);
mSelector.draw(canvas);
-
+
if (mTextList == null) {
-
+
/* We're not setup with values so don't draw anything else */
return;
}
-
+
final TextPaint textPaintDark = mTextPaintDark;
if (hasFocus()) {
-
+
/* The bounds of the top area where the text should be light */
final int topLeft = 0;
final int topTop = 0;
final String text4 = mText4;
final String text5 = mText5;
final TextPaint textPaintLight = mTextPaintLight;
-
+
/*
* Draw the 1st, 2nd and 3rd item in light only, clip it so it only
* draws in the area above the selector
final int bottomLeft = 0;
final int bottomTop = selectorBottom - SELECTOR_ARROW_HEIGHT;
final int bottomRight = selectorRight;
- final int bottomBottom = mMeasuredHeight;
+ final int bottomBottom = getMeasuredHeight();
/*
* Draw the 3rd, 4th and 5th in white text, clip it so it only draws
drawText(canvas, text5,
TEXT5_Y + mTotalAnimatedDistance, textPaintLight);
canvas.restore();
-
+
} else {
drawText(canvas, mText3, TEXT3_Y, textPaintDark);
}
}
if (mStopAnimation) {
final int previousScrollMode = mScrollMode;
-
+
/* No longer scrolling, we wait till the current animation
* completes then we stop.
*/
mIsAnimationRunning = false;
mStopAnimation = false;
mScrollMode = SCROLL_MODE_NONE;
-
+
/* If the current selected item is an empty string
* scroll past it.
*/
mText4 = getTextToDraw(1);
mText5 = getTextToDraw(2);
}
-
+
private String getTextToDraw(int offset) {
int index = getNewIndex(offset);
if (index < 0) {
}
return index;
}
-
+
private void scroll() {
if (mIsAnimationRunning) {
return;
mDelayBetweenAnimations = mScrollInterval / mNumberOfAnimations;
}
}
-
+
private void drawText(Canvas canvas, String text, int y, TextPaint paint) {
int width = (int) paint.measureText(text);
int x = getMeasuredWidth() - width - TEXT_MARGIN_RIGHT;
canvas.drawText(text, x, y, paint);
}
-
+
public int getCurrentSelectedPos() {
return mCurrentSelectedPos;
}
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