/**
* Set the color to be highlighted by the pointer. </br> </br> If the instances {@code SVBar} and
* the {@code OpacityBar} aren't null the color will also be set to them
*
* @param color The RGB value of the color to highlight. If this is not a color displayed on the
* color wheel a very simple algorithm is used to map it to the color wheel. The resulting
* color often won't look close to the original color. This is especially true for shades of
* grey. You have been warned!
*/
public void setColor(int color) {
mAngle = colorToAngle(color);
mPointerColor.setColor(calculateColor(mAngle));
// check of the instance isn't null
if (mOpacityBar != null) {
// set the value of the opacity
mOpacityBar.setColor(mColor);
mOpacityBar.setOpacity(Color.alpha(color));
}
// check if the instance isn't null
if (mSVbar != null) {
// the array mHSV will be filled with the HSV values of the color.
Color.colorToHSV(color, mHSV);
mSVbar.setColor(mColor);
// because of the design of the Saturation/Value bar,
// we can only use Saturation or Value every time.
// Here will be checked which we shall use.
if (mHSV[1] < mHSV[2]) {
mSVbar.setSaturation(mHSV[1]);
} else { // if (mHSV[1] > mHSV[2]) {
mSVbar.setValue(mHSV[2]);
}
}
invalidate();
}
@Override
public boolean onTouchEvent(MotionEvent event) {
// Convert coordinates to our internal coordinate system
float x = event.getX() - mTranslationOffset;
float y = event.getY() - mTranslationOffset;
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
// Check whether the user pressed on the pointer.
float[] pointerPosition = calculatePointerPosition(mAngle);
if (x >= (pointerPosition[0] - mColorPointerHaloRadius)
&& x <= (pointerPosition[0] + mColorPointerHaloRadius)
&& y >= (pointerPosition[1] - mColorPointerHaloRadius)
&& y <= (pointerPosition[1] + mColorPointerHaloRadius)) {
mUserIsMovingPointer = true;
invalidate();
}
// Check wheter the user pressed on the center.
if (x >= -mColorCenterRadius
&& x <= mColorCenterRadius
&& y >= -mColorCenterRadius
&& y <= mColorCenterRadius) {
mCenterHaloPaint.setAlpha(0x50);
setColor(getOldCenterColor());
mCenterNewPaint.setColor(getOldCenterColor());
invalidate();
}
break;
case MotionEvent.ACTION_MOVE:
if (mUserIsMovingPointer) {
mAngle = (float) java.lang.Math.atan2(y, x);
mPointerColor.setColor(calculateColor(mAngle));
// Check wheter there is a Saturation/Value bar or/and
// OpacityBar connected.
if (mSVbar != null && mOpacityBar == null) {
mSVbar.setColor(mColor);
} else if (mSVbar == null && mOpacityBar != null) {
mOpacityBar.setColor(mColor);
} else if (mSVbar != null && mOpacityBar != null) {
mOpacityBar.setColor(mColor);
mSVbar.setColor(mColor);
} else {
setNewCenterColor(mCenterNewColor = calculateColor(mAngle));
}
invalidate();
}
break;
case MotionEvent.ACTION_UP:
mUserIsMovingPointer = false;
mCenterHaloPaint.setAlpha(0x00);
invalidate();
break;
}
getParent().requestDisallowInterceptTouchEvent(true);
return true;
}
/**
* Add a Saturation/Value bar to the color wheel.
*
* @param bar The instance of the Saturation/Value bar.
*/
public void addSVBar(SVBar bar) {
mSVbar = bar;
// Give an instance of the color picker to the Saturation/Value bar.
mSVbar.setColorPicker(this);
mSVbar.setColor(mColor);
}
