Adjust search bar action

app/src/main/java/com/hippo/drawable/AddDeleteDrawable.java

@@ -0,0 +1,129 @@
+/*
+ * Copyright (C) 2015 Hippo Seven
+ *
+ * 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
+ * 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.hippo.drawable;
+
+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 android.graphics.Rect;
+import android.graphics.drawable.Drawable;
+
+import com.hippo.ehviewer.R;
+import com.hippo.util.MathUtils;
+
+public class AddDeleteDrawable extends Drawable {
+
+    private final Paint mPaint = new Paint();
+    private final Path mPath = new Path();
+
+    private final int mSize;
+    private final float mBarThickness;
+
+    private float mProgress;
+
+    private boolean mVerticalMirror = false;
+
+    /**
+     * @param context used to get the configuration for the drawable from
+     */
+    public AddDeleteDrawable(Context context) {
+        Resources resources = context.getResources();
+
+        mSize = resources.getDimensionPixelSize(R.dimen.add_size);
+        mBarThickness = Math.round(resources.getDimension(R.dimen.add_thickness));
+
+        mPaint.setColor(resources.getColor(R.color.primary_drawable_light));
+        mPaint.setStyle(Paint.Style.STROKE);
+        mPaint.setStrokeJoin(Paint.Join.MITER);
+        mPaint.setStrokeCap(Paint.Cap.BUTT);
+        mPaint.setStrokeWidth(mBarThickness);
+
+        float halfSize = mSize / 2;
+        mPath.moveTo(0f, -halfSize);
+        mPath.lineTo(0, halfSize);
+        mPath.moveTo(-halfSize, 0);
+        mPath.lineTo(halfSize, 0);
+    }
+
+    @Override
+    public void draw(Canvas canvas) {
+        Rect bounds = getBounds();
+        float canvasRotate;
+        if (mVerticalMirror) {
+            canvasRotate = MathUtils.lerp(-270, -135f, mProgress);
+        } else {
+            canvasRotate = MathUtils.lerp(0f, -135f, mProgress);
+        }
+
+        canvas.save();
+        canvas.translate(bounds.centerX(), bounds.centerY());
+        canvas.rotate(canvasRotate);
+        canvas.drawPath(mPath, mPaint);
+        canvas.restore();
+    }
+
+    @Override
+    public void setAlpha(int alpha) {
+        mPaint.setAlpha(alpha);
+    }
+
+    @Override
+    public void setColorFilter(ColorFilter cf) {
+        mPaint.setColorFilter(cf);
+    }
+
+    @Override
+    public int getIntrinsicHeight() {
+        return mSize;
+    }
+
+    @Override
+    public int getIntrinsicWidth() {
+        return mSize;
+    }
+
+    /**
+     * If set, canvas is flipped when progress reached to end and going back to start.
+     */
+    protected void setVerticalMirror(boolean verticalMirror) {
+        mVerticalMirror = verticalMirror;
+    }
+
+    @SuppressWarnings("unused")
+    public float getProgress() {
+        return mProgress;
+    }
+
+    @SuppressWarnings("unused")
+    public void setProgress(float progress) {
+        if (progress == 1f) {
+            setVerticalMirror(true);
+        } else if (progress == 0f) {
+            setVerticalMirror(false);
+        }
+        mProgress = progress;
+        invalidateSelf();
+    }
+
+    @Override
+    public int getOpacity() {
+        return PixelFormat.TRANSLUCENT;
+    }
+}