@Override
protected void onBoundsChange(Rect bounds) {
super.onBoundsChange(bounds);
fBounds.left = bounds.left + mBorderWidth / 2f + .5f;
fBounds.right = bounds.right - mBorderWidth / 2f - .5f;
fBounds.top = bounds.top + mBorderWidth / 2f + .5f;
fBounds.bottom = bounds.bottom - mBorderWidth / 2f - .5f;
}
/** Resets the dirty region when the motion event occurs. */
private void resetDirtyRect(float eventX, float eventY) {
// The lastTouchX and lastTouchY were set when the ACTION_DOWN
// motion event occurred.
dirtyRect.left = Math.min(lastTouchX, eventX);
dirtyRect.right = Math.max(lastTouchX, eventX);
dirtyRect.top = Math.min(lastTouchY, eventY);
dirtyRect.bottom = Math.max(lastTouchY, eventY);
}
private RectF getRectF() {
if (backgroundRectF == null) {
backgroundRectF = new RectF();
backgroundRectF.left = mPadding;
backgroundRectF.top = mPadding;
backgroundRectF.right = getWidth() - mPadding;
backgroundRectF.bottom = getHeight() - mPadding;
}
return backgroundRectF;
}
/** Called when replaying history to ensure the dirty region includes all points. */
private void expandDirtyRect(float historicalX, float historicalY) {
if (historicalX < dirtyRect.left) {
dirtyRect.left = historicalX;
} else if (historicalX > dirtyRect.right) {
dirtyRect.right = historicalX;
}
if (historicalY < dirtyRect.top) {
dirtyRect.top = historicalY;
} else if (historicalY > dirtyRect.bottom) {
dirtyRect.bottom = historicalY;
}
}
private void doLimits(float x, float y) {
if (x < limits.left) {
limits.left = x;
}
if (x > limits.right) {
limits.right = x;
}
if (y < limits.top) {
limits.top = y;
}
if (y > limits.bottom) {
limits.bottom = y;
}
}
