1 files changed, 98 insertions, 0 deletions
diff --git a/src/com/android/launcher3/pageindicators/CaretDrawable.java b/src/com/android/launcher3/pageindicators/CaretDrawable.java
new file mode 100644
index 000000000..3a7fc4264
--- /dev/null
+++ b/src/com/android/launcher3/pageindicators/CaretDrawable.java
@@ -0,0 +1,98 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.launcher3.pageindicators;
+
+import android.content.Context;
+import android.content.res.Resources;
+import android.graphics.Canvas;
+import android.graphics.ColorFilter;
+import android.graphics.Paint;
+import android.graphics.Path;
+import android.graphics.PixelFormat;
+
+import com.android.launcher3.R;
+
+import android.graphics.drawable.Drawable;
+
+public class CaretDrawable extends Drawable {
+    public static final int LEVEL_CARET_POINTING_UP = 0; // minimum possible level value
+    public static final int LEVEL_CARET_POINTING_DOWN = 10000; // maximum possible level value
+    public static final int LEVEL_CARET_NEUTRAL = LEVEL_CARET_POINTING_DOWN / 2;
+
+    private float mCaretProgress;
+
+    private Paint mPaint = new Paint();
+    private Path mPath = new Path();
+    private int mInset;
+
+    public CaretDrawable(Context context) {
+        final Resources res = context.getResources();
+
+        mPaint.setColor(res.getColor(R.color.all_apps_caret_color));
+        mPaint.setAntiAlias(true);
+        mPaint.setStrokeWidth(res.getDimensionPixelSize(R.dimen.all_apps_caret_stroke_width));
+        mPaint.setStyle(Paint.Style.STROKE);
+        mPaint.setStrokeCap(Paint.Cap.SQUARE);
+        mPaint.setStrokeJoin(Paint.Join.MITER);
+
+        mInset = res.getDimensionPixelSize(R.dimen.all_apps_caret_inset);
+    }
+
+    @Override
+    public void draw(Canvas canvas) {
+        final float width = getBounds().width();
+        final float height = getBounds().height();
+        final float left = getBounds().left;
+        final float top = getBounds().top;
+
+        final float verticalInset = (height / 4);
+        final float caretHeight = (height - (verticalInset * 2));
+
+        mPath.reset();
+        mPath.moveTo(left, top + caretHeight * (1 - mCaretProgress));
+        mPath.lineTo(left + (width / 2), top + caretHeight * mCaretProgress);
+        mPath.lineTo(left + width, top + caretHeight * (1 - mCaretProgress));
+
+        canvas.drawPath(mPath, mPaint);
+    }
+
+    @Override
+    protected boolean onLevelChange(int level) {
+        mCaretProgress = (float) level / (float) LEVEL_CARET_POINTING_DOWN;
+        invalidateSelf();
+        return true;
+    }
+
+    @Override
+    public int getOpacity() {
+        return PixelFormat.OPAQUE;
+    }
+
+    @Override
+    public void setAlpha(int alpha) {
+        // no-op
+    }
+
+    @Override
+    public void setColorFilter(ColorFilter cf) {
+        // no-op
+    }
+
+    @Override
+    public void setBounds(int left, int top, int right, int bottom) {
+        super.setBounds(left + mInset, top + mInset, right - mInset, bottom - mInset);
+    }
+}