@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
mBackground.setBounds(0, 0, w, h);
if (mIcon != null) {
float half = mIconSize / 2f;
mIcon.setBounds(
(int) (mBackground.getCenterX() - half),
(int) (mBackground.getCenterY() - half),
(int) (mBackground.getCenterX() + half),
(int) (mBackground.getCenterY() + half));
}
if (mPrevIcon != null) {
float half = mIconSize / 2f;
mPrevIcon.setBounds(
(int) (mBackground.getCenterX() - half),
(int) (mBackground.getCenterY() - half),
(int) (mBackground.getCenterX() + half),
(int) (mBackground.getCenterY() + half));
}
}
/**
* Set the drawable that is used as this button's icon.
*
* @param icon The drawable.
* @param animation Indicate should show animation when switch drawable or not.
*/
public void setIcon(Drawable icon, boolean animation) {
if (icon == null) return;
if (animation) {
mSwitchIconAnimator.startAnimation(icon);
invalidate();
} else {
if (mIcon != null) {
mIcon.setCallback(null);
unscheduleDrawable(mIcon);
}
mIcon = icon;
float half = mIconSize / 2f;
mIcon.setBounds(
(int) (mBackground.getCenterX() - half),
(int) (mBackground.getCenterY() - half),
(int) (mBackground.getCenterX() + half),
(int) (mBackground.getCenterY() + half));
mIcon.setCallback(this);
invalidate();
}
}
private void updateParams(int x, int y, int gravity, ViewGroup.LayoutParams params) {
int horizontalGravity = gravity & Gravity.HORIZONTAL_GRAVITY_MASK;
switch (horizontalGravity) {
case Gravity.LEFT:
setLeftMargin(params, (int) (x - mBackground.getPaddingLeft()));
break;
case Gravity.CENTER_HORIZONTAL:
setLeftMargin(params, (int) (x - mBackground.getCenterX()));
break;
case Gravity.RIGHT:
setLeftMargin(
params, (int) (x - mBackground.getPaddingLeft() - mBackground.getRadius() * 2));
break;
default:
setLeftMargin(params, (int) (x - mBackground.getPaddingLeft()));
break;
}
int verticalGravity = gravity & Gravity.VERTICAL_GRAVITY_MASK;
switch (verticalGravity) {
case Gravity.TOP:
setTopMargin(params, (int) (y - mBackground.getPaddingTop()));
break;
case Gravity.CENTER_VERTICAL:
setTopMargin(params, (int) (y - mBackground.getCenterY()));
break;
case Gravity.BOTTOM:
setTopMargin(params, (int) (y - mBackground.getPaddingTop() - mBackground.getRadius() * 2));
break;
default:
setTopMargin(params, (int) (y - mBackground.getPaddingTop()));
break;
}
setLayoutParams(params);
}