private void init(android.content.Context context)
{
// Get both the scrollbar states drawables
android.content.res.TypedArray ta = context.getTheme().obtainStyledAttributes(ATTRS
);
useThumbDrawable(context, ta.getDrawable(THUMB_DRAWABLE));
mTrackDrawable = ta.getDrawable(TRACK_DRAWABLE);
mOverlayDrawableLeft = ta.getDrawable(PREVIEW_BACKGROUND_LEFT);
mOverlayDrawableRight = ta.getDrawable(PREVIEW_BACKGROUND_RIGHT);
mOverlayPosition = ta.getInt(OVERLAY_POSITION, OVERLAY_FLOATING);
mScrollCompleted = true;
getSectionsFromIndexer();
mOverlaySize = context.getResources().getDimensionPixelSize([email protected]
.fastscroll_overlay_size);
mOverlayPos = new android.graphics.RectF();
mScrollFade = new android.widget.FastScroller.ScrollFade(this);
mPaint = new android.graphics.Paint();
mPaint.setAntiAlias(true);
mPaint.setTextAlign(android.graphics.Paint.Align.CENTER);
mPaint.setTextSize(mOverlaySize / 2);
android.content.res.ColorStateList textColor = ta.getColorStateList(TEXT_COLOR);
int textColorNormal = textColor.getDefaultColor();
mPaint.setColor(textColorNormal);
mPaint.setStyle(android.graphics.Paint.Style.FILL_AND_STROKE);
// to show mOverlayDrawable properly
if (mList.getWidth() > 0 && mList.getHeight() > 0)
{
onSizeChanged(mList.getWidth(), mList.getHeight(), 0, 0);
}
mState = STATE_NONE;
refreshDrawableState();
ta.recycle();
mScaledTouchSlop = android.view.ViewConfiguration.get(context).getScaledTouchSlop
();
mMatchDragPosition = context.getApplicationInfo().targetSdkVersion >= android.os.Build
.VERSION_CODES.HONEYCOMB;
setScrollbarPosition(mList.getVerticalScrollbarPosition());
}
public virtual void draw(android.graphics.Canvas canvas)
{
if (mState == STATE_NONE)
{
// No need to draw anything
return;
}
int y = mThumbY;
int viewWidth = mList.getWidth();
android.widget.FastScroller.ScrollFade scrollFade = mScrollFade;
int alpha = -1;
if (mState == STATE_EXIT)
{
alpha = scrollFade.getAlpha();
if (alpha < android.widget.FastScroller.ScrollFade.ALPHA_MAX / 2)
{
mThumbDrawable.setAlpha(alpha * 2);
}
int left = 0;
switch (mPosition)
{
case android.view.View.SCROLLBAR_POSITION_DEFAULT:
case android.view.View.SCROLLBAR_POSITION_RIGHT:
{
left = viewWidth - (mThumbW * alpha) / android.widget.FastScroller.ScrollFade.ALPHA_MAX;
break;
}
case android.view.View.SCROLLBAR_POSITION_LEFT:
{
left = -mThumbW + (mThumbW * alpha) / android.widget.FastScroller.ScrollFade.ALPHA_MAX;
break;
}
}
mThumbDrawable.setBounds(left, 0, left + mThumbW, mThumbH);
mChangedBounds = true;
}
if (mTrackDrawable != null)
{
android.graphics.Rect thumbBounds = mThumbDrawable.getBounds();
int left = thumbBounds.left;
int halfThumbHeight = (thumbBounds.bottom - thumbBounds.top) / 2;
int trackWidth = mTrackDrawable.getIntrinsicWidth();
int trackLeft = (left + mThumbW / 2) - trackWidth / 2;
mTrackDrawable.setBounds(trackLeft, halfThumbHeight, trackLeft + trackWidth, mList
.getHeight() - halfThumbHeight);
mTrackDrawable.draw(canvas);
}
canvas.translate(0, y);
mThumbDrawable.draw(canvas);
canvas.translate(0, -y);
// If user is dragging the scroll bar, draw the alphabet overlay
if (mState == STATE_DRAGGING && mDrawOverlay)
{
if (mOverlayPosition == OVERLAY_AT_THUMB)
{
int left = 0;
switch (mPosition)
{
case android.view.View.SCROLLBAR_POSITION_DEFAULT:
case android.view.View.SCROLLBAR_POSITION_RIGHT:
default:
{
left = System.Math.Max(0, mThumbDrawable.getBounds().left - mThumbW - mOverlaySize
);
break;
}
case android.view.View.SCROLLBAR_POSITION_LEFT:
{
left = System.Math.Min(mThumbDrawable.getBounds().right + mThumbW, mList.getWidth
() - mOverlaySize);
break;
}
}
int top = System.Math.Max(0, System.Math.Min(y + (mThumbH - mOverlaySize) / 2, mList
.getHeight() - mOverlaySize));
android.graphics.RectF pos = mOverlayPos;
pos.left = left;
pos.right = pos.left + mOverlaySize;
pos.top = top;
pos.bottom = pos.top + mOverlaySize;
if (mOverlayDrawable != null)
{
mOverlayDrawable.setBounds((int)pos.left, (int)pos.top, (int)pos.right, (int)pos.
bottom);
}
}
mOverlayDrawable.draw(canvas);
android.graphics.Paint paint = mPaint;
float descent = paint.descent();
android.graphics.RectF rectF = mOverlayPos;
android.graphics.Rect tmpRect = mTmpRect;
mOverlayDrawable.getPadding(tmpRect);
int hOff = (tmpRect.right - tmpRect.left) / 2;
int vOff = (tmpRect.bottom - tmpRect.top) / 2;
canvas.drawText(mSectionText, (int)(rectF.left + rectF.right) / 2 - hOff, (int)(rectF
.bottom + rectF.top) / 2 + mOverlaySize / 4 - descent - vOff, paint);
}
else
{
if (mState == STATE_EXIT)
{
if (alpha == 0)
{
// Done with exit
setState(STATE_NONE);
}
else
{
if (mTrackDrawable != null)
{
mList.invalidate(viewWidth - mThumbW, 0, viewWidth, mList.getHeight());
}
else
{
mList.invalidate(viewWidth - mThumbW, y, viewWidth, y + mThumbH);
}
}
}
}
}
private void init(android.content.Context context)
{
// Get both the scrollbar states drawables
android.content.res.TypedArray ta = context.getTheme().obtainStyledAttributes(ATTRS
);
useThumbDrawable(context, ta.getDrawable(THUMB_DRAWABLE));
mTrackDrawable = ta.getDrawable(TRACK_DRAWABLE);
mOverlayDrawableLeft = ta.getDrawable(PREVIEW_BACKGROUND_LEFT);
mOverlayDrawableRight = ta.getDrawable(PREVIEW_BACKGROUND_RIGHT);
mOverlayPosition = ta.getInt(OVERLAY_POSITION, OVERLAY_FLOATING);
mScrollCompleted = true;
getSectionsFromIndexer();
mOverlaySize = context.getResources().getDimensionPixelSize([email protected]
.fastscroll_overlay_size);
mOverlayPos = new android.graphics.RectF();
mScrollFade = new android.widget.FastScroller.ScrollFade(this);
mPaint = new android.graphics.Paint();
mPaint.setAntiAlias(true);
mPaint.setTextAlign(android.graphics.Paint.Align.CENTER);
mPaint.setTextSize(mOverlaySize / 2);
android.content.res.ColorStateList textColor = ta.getColorStateList(TEXT_COLOR);
int textColorNormal = textColor.getDefaultColor();
mPaint.setColor(textColorNormal);
mPaint.setStyle(android.graphics.Paint.Style.FILL_AND_STROKE);
// to show mOverlayDrawable properly
if (mList.getWidth() > 0 && mList.getHeight() > 0)
{
onSizeChanged(mList.getWidth(), mList.getHeight(), 0, 0);
}
mState = STATE_NONE;
refreshDrawableState();
ta.recycle();
mScaledTouchSlop = android.view.ViewConfiguration.get(context).getScaledTouchSlop
();
mMatchDragPosition = context.getApplicationInfo().targetSdkVersion >= android.os.Build
.VERSION_CODES.HONEYCOMB;
setScrollbarPosition(mList.getVerticalScrollbarPosition());
}
