private void showColorPickerDialog(
Context context, int preColor, final ColorPicker.OnColorChangedListener listener) {
AlertDialog.Builder builder = new AlertDialog.Builder(context, AlertDialog.THEME_HOLO_DARK);
LinearLayout linearLayout = new LinearLayout(context);
linearLayout.setOrientation(LinearLayout.VERTICAL);
LinearLayout.LayoutParams params =
new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT);
linearLayout.setLayoutParams(params);
final ColorPicker picker = new ColorPicker(context);
picker.setLayoutParams(params);
OpacityBar opacityBar = new OpacityBar(context);
opacityBar.setLayoutParams(params);
SaturationBar saturationBar = new SaturationBar(context);
saturationBar.setLayoutParams(params);
ValueBar valueBar = new ValueBar(context);
valueBar.setLayoutParams(params);
linearLayout.addView(picker);
linearLayout.addView(opacityBar);
linearLayout.addView(saturationBar);
linearLayout.addView(valueBar);
picker.addOpacityBar(opacityBar);
picker.addSaturationBar(saturationBar);
picker.addValueBar(valueBar);
picker.setOldCenterColor(preColor);
picker.setColor(preColor);
builder.setView(linearLayout);
builder.setPositiveButton(
"OK",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
setColor(picker.getColor());
listener.onColorChanged(picker.getColor());
}
});
builder.setNegativeButton(
"Cancel",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
});
AlertDialog alertDialog = builder.create();
alertDialog.setCanceledOnTouchOutside(false);
alertDialog.show();
}
@Override
protected View onCreateDialogView() {
View view = LayoutInflater.from(getContext()).inflate(R.layout.dialog_colorpicker, null);
mColorPickerView = (ColorPicker) view.findViewById(R.id.pk_colorPicker);
OpacityBar mOpacityBar = (OpacityBar) view.findViewById(R.id.pk_opacityBar);
SVBar svBar = (SVBar) view.findViewById(R.id.pk_svBar);
mOpacityBar.setColorPicker(mColorPickerView);
svBar.setColorPicker(mColorPickerView);
mColorPickerView.addOpacityBar(mOpacityBar);
mColorPickerView.addSVBar(svBar);
mOpacityBar.setVisibility(mAlphaAllowed ? View.VISIBLE : View.GONE);
svBar.setVisibility(mSVAllowed ? View.VISIBLE : View.GONE);
return view;
}
/**
* Set the color to be highlighted by the pointer. 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]);
}
}
if (mSaturationBar != null) {
Color.colorToHSV(color, mHSV);
mSaturationBar.setColor(mColor);
mSaturationBar.setSaturation(mHSV[1]);
}
if (mValueBar != null && mSaturationBar == null) {
Color.colorToHSV(color, mHSV);
mValueBar.setColor(mColor);
mValueBar.setValue(mHSV[2]);
} else if (mValueBar != null) {
Color.colorToHSV(color, mHSV);
mValueBar.setValue(mHSV[2]);
}
setNewCenterColor(color);
}
/**
* Used to change the color of the {@code OpacityBar} used by the {@code SVBar} if there is an
* change in color.
*
* @param color int of the color used to change the opacity bar color.
*/
public void changeOpacityBarColor(int color) {
if (mOpacityBar != null) {
mOpacityBar.setColor(color);
}
}
/**
* Add a Opacity bar to the color wheel.
*
* @param bar The instance of the Opacity bar.
*/
public void addOpacityBar(OpacityBar bar) {
mOpacityBar = bar;
// Give an instance of the color picker to the Opacity bar.
mOpacityBar.setColorPicker(this);
mOpacityBar.setColor(mColor);
}
@Override
public boolean onTouchEvent(MotionEvent event) {
getParent().requestDisallowInterceptTouchEvent(true);
// 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)) {
mSlopX = x - pointerPosition[0];
mSlopY = y - pointerPosition[1];
mUserIsMovingPointer = true;
invalidate();
}
// Check whether the user pressed on the center.
else if (x >= -mColorCenterRadius
&& x <= mColorCenterRadius
&& y >= -mColorCenterRadius
&& y <= mColorCenterRadius
&& mShowCenterOldColor) {
mCenterHaloPaint.setAlpha(0x50);
setColor(getOldCenterColor());
invalidate();
}
// Check whether the user pressed anywhere on the wheel.
else if (Math.sqrt(x * x + y * y) <= mColorWheelRadius + mColorPointerHaloRadius
&& Math.sqrt(x * x + y * y) >= mColorWheelRadius - mColorPointerHaloRadius
&& mTouchAnywhereOnColorWheelEnabled) {
mUserIsMovingPointer = true;
invalidate();
}
// If user did not press pointer or center, report event not handled
else {
getParent().requestDisallowInterceptTouchEvent(false);
return false;
}
break;
case MotionEvent.ACTION_MOVE:
if (mUserIsMovingPointer) {
mAngle = (float) Math.atan2(y - mSlopY, x - mSlopX);
mPointerColor.setColor(calculateColor(mAngle));
setNewCenterColor(mCenterNewColor = calculateColor(mAngle));
if (mOpacityBar != null) {
mOpacityBar.setColor(mColor);
}
if (mValueBar != null) {
mValueBar.setColor(mColor);
}
if (mSaturationBar != null) {
mSaturationBar.setColor(mColor);
}
if (mSVbar != null) {
mSVbar.setColor(mColor);
}
invalidate();
}
// If user did not press pointer or center, report event not handled
else {
getParent().requestDisallowInterceptTouchEvent(false);
return false;
}
break;
case MotionEvent.ACTION_UP:
mUserIsMovingPointer = false;
mCenterHaloPaint.setAlpha(0x00);
if (onColorSelectedListener != null && mCenterNewColor != oldSelectedListenerColor) {
onColorSelectedListener.onColorSelected(mCenterNewColor);
oldSelectedListenerColor = mCenterNewColor;
}
invalidate();
break;
case MotionEvent.ACTION_CANCEL:
if (onColorSelectedListener != null && mCenterNewColor != oldSelectedListenerColor) {
onColorSelectedListener.onColorSelected(mCenterNewColor);
oldSelectedListenerColor = mCenterNewColor;
}
break;
}
return true;
}