Color Picker: use oval preview

this code was in old light customization settings commit, no idea who made it

Signed-off-by: xyyx <xyyx@mail.ru>

res/values/cherish_dimens.xml

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--  Copyright (C) 2017 The ABC rom
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ -->
+
+<resources>
+    <dimen name="picker_circle_preview_size">26dp</dimen>
+</resources>

src/net/margaritov/preference/colorpicker/ColorPickerPreference.java

@@ -23,6 +23,8 @@ import android.content.res.TypedArray;
 import android.graphics.Bitmap;
 import android.graphics.Bitmap.Config;
 import android.graphics.Color;
+import android.graphics.drawable.ShapeDrawable;
+import android.graphics.drawable.shapes.OvalShape;
 import android.os.Bundle;
 import android.os.Parcel;
 import android.os.Parcelable;
@@ -200,8 +202,10 @@ public class ColorPickerPreference extends Preference implements
         }
         widgetFrameView.addView(iView);
         widgetFrameView.setMinimumWidth(0);
-        iView.setBackgroundDrawable(new AlphaPatternDrawable((int) (5 * mDensity)));
+        final int size = (int) getContext().getResources().getDimension(R.dimen.picker_circle_preview_size);
-        iView.setImageBitmap(getPreviewBitmap());
+        final int imageColor = ((mValue & 0xF0F0F0) == 0xF0F0F0) ?
+                (mValue - 0x101010) : mValue;
+        iView.setImageDrawable(createOvalShape(size, 0xFF000000 + imageColor));
         iView.setTag("preview");
         iView.setOnClickListener(new View.OnClickListener() {
             @Override
@@ -221,26 +225,6 @@ public class ColorPickerPreference extends Preference implements
         }
     }
 
-    private Bitmap getPreviewBitmap() {
-        int d = (int) (mDensity * 31); // 30dip
-        int color = mValue;
-        Bitmap bm = Bitmap.createBitmap(d, d, Config.ARGB_8888);
-        int w = bm.getWidth();
-        int h = bm.getHeight();
-        int c = color;
-        for (int i = 0; i < w; i++) {
-            for (int j = i; j < h; j++) {
-                c = (i <= 1 || j <= 1 || i >= w - 2 || j >= h - 2) ? Color.GRAY : color;
-                bm.setPixel(i, j, c);
-                if (i != j) {
-                    bm.setPixel(j, i, c);
-                }
-            }
-        }
-
-        return bm;
-    }
-
     @Override
     public void onColorChanged(int color) {
         if (isPersistent()) {
@@ -414,4 +398,12 @@ public class ColorPickerPreference extends Preference implements
             }
         };
     }
+
+    private static ShapeDrawable createOvalShape(int size, int color) {
+        ShapeDrawable shape = new ShapeDrawable(new OvalShape());
+        shape.setIntrinsicHeight(size);
+        shape.setIntrinsicWidth(size);
+        shape.getPaint().setColor(color);
+        return shape;
+    }
 }