Add quick controls

    Bug: http://b/issue?id=3277888
    Added Quick Controls Lab setting
    Implemented Quick Controls UI

Change-Id: I72011daf9140aa5d15c8b785126867c10bbc5501

1 files changed, 463 insertions, 0 deletions

diff --git a/src/com/android/browser/view/PieMenu.java b/src/com/android/browser/view/PieMenu.java
new file mode 100644
index 0000000..d838a34
--- /dev/null
+++ b/src/com/android/browser/view/PieMenu.java
@@ -0,0 +1,463 @@
+/*
+ * Copyright (C) 2010 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.browser.view;
+
+import com.android.browser.R;
+
+import android.content.Context;
+import android.content.res.Resources;
+import android.graphics.Canvas;
+import android.graphics.Paint;
+import android.graphics.Path;
+import android.graphics.Point;
+import android.graphics.PointF;
+import android.graphics.Rect;
+import android.graphics.RectF;
+import android.util.AttributeSet;
+import android.view.MotionEvent;
+import android.view.View;
+import android.widget.FrameLayout;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+public class PieMenu extends FrameLayout {
+
+    private static final int RADIUS_GAP = 10;
+
+    public interface PieController {
+        /**
+         * called before menu opens to customize menu
+         * returns if pie state has been changed
+         */
+        public boolean onOpen();
+    }
+    private Point mCenter;
+    private int mRadius;
+    private int mRadiusInc;
+    private int mSlop;
+
+    private boolean mOpen;
+    private Paint mPaint;
+    private Paint mSelectedPaint;
+    private PieController mController;
+
+    private Map<View, List<View>> mMenu;
+    private List<View> mStack;
+
+    private boolean mDirty;
+
+    /**
+     * @param context
+     * @param attrs
+     * @param defStyle
+     */
+    public PieMenu(Context context, AttributeSet attrs, int defStyle) {
+        super(context, attrs, defStyle);
+        init(context);
+    }
+
+    /**
+     * @param context
+     * @param attrs
+     */
+    public PieMenu(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        init(context);
+    }
+
+    /**
+     * @param context
+     */
+    public PieMenu(Context context) {
+        super(context);
+        init(context);
+    }
+
+    private void init(Context ctx) {
+        this.setTag(new MenuTag(0));
+        mStack = new ArrayList<View>();
+        mStack.add(this);
+        Resources res = ctx.getResources();
+        mRadius = (int) res.getDimension(R.dimen.qc_radius);
+        mRadiusInc = (int) res.getDimension(R.dimen.qc_radius_inc);
+        mSlop = (int) res.getDimension(R.dimen.qc_slop);
+        mPaint = new Paint();
+        mPaint.setAntiAlias(true);
+        mPaint.setColor(res.getColor(R.color.qc_slice_normal));
+        mSelectedPaint = new Paint();
+        mSelectedPaint.setAntiAlias(true);
+        mSelectedPaint.setColor(res.getColor(R.color.qc_slice_active));
+        mOpen = false;
+        mMenu = new HashMap<View, List<View>>();
+        setWillNotDraw(false);
+        setDrawingCacheEnabled(false);
+        mCenter = new Point(0,0);
+        mDirty = true;
+    }
+
+    public void setController(PieController ctl) {
+        mController = ctl;
+    }
+
+    public void setRadius(int r) {
+        mRadius = r;
+        requestLayout();
+    }
+
+    public void setRadiusIncrement(int ri) {
+        mRadiusInc = ri;
+        requestLayout();
+    }
+
+    /**
+     * add a menu item to another item as a submenu
+     * @param item
+     * @param parent
+     */
+    public void addItem(View item, View parent) {
+        List<View> subs = mMenu.get(parent);
+        if (subs == null) {
+            subs = new ArrayList<View>();
+            mMenu.put(parent, subs);
+        }
+        subs.add(item);
+        MenuTag tag = new MenuTag(((MenuTag) parent.getTag()).level + 1);
+        item.setTag(tag);
+    }
+
+    public void addItem(View view) {
+        // add the item to the pie itself
+        addItem(view, this);
+    }
+
+    public void removeItem(View view) {
+        List<View> subs = mMenu.get(view);
+        mMenu.remove(view);
+        for (View p : mMenu.keySet()) {
+            List<View> sl = mMenu.get(p);
+            if (sl != null) {
+                sl.remove(view);
+            }
+        }
+    }
+
+    public void clearItems(View parent) {
+        List<View> subs = mMenu.remove(parent);
+        if (subs != null) {
+            for (View sub: subs) {
+                clearItems(sub);
+            }
+        }
+    }
+
+    public void clearItems() {
+        mMenu.clear();
+    }
+
+
+    public void show(boolean show) {
+        mOpen = show;
+        if (mOpen) {
+            if (mController != null) {
+                boolean changed = mController.onOpen();
+            }
+            mDirty = true;
+        }
+        if (!show) {
+            // hide sub items
+            mStack.clear();
+            mStack.add(this);
+        }
+        invalidate();
+    }
+
+    private void setCenter(int x, int y) {
+        if (x < mSlop) {
+            mCenter.x = 0;
+        } else {
+            mCenter.x = getWidth();
+        }
+        mCenter.y = y;
+    }
+
+    private boolean onTheLeft() {
+        return mCenter.x < mSlop;
+    }
+
+    @Override
+    protected void onDraw(Canvas canvas) {
+        if (mOpen) {
+            int radius = mRadius;
+            // start in the center for 0 level menu
+            float anchor = (float) Math.PI / 2;
+            PointF angles = new PointF();
+            int state = canvas.save();
+            if (onTheLeft()) {
+                // left handed
+                canvas.scale(-1, 1);
+            }
+            for (View parent : mStack) {
+                List<View> subs = mMenu.get(parent);
+                if (subs != null) {
+                    setGeometry(anchor, subs.size(), angles);
+                }
+                anchor = drawSlices(canvas, subs, radius, angles.x, angles.y);
+                radius += mRadiusInc + RADIUS_GAP;
+            }
+            canvas.restoreToCount(state);
+            mDirty = false;
+        }
+    }
+
+    /**
+     * draw the set of slices
+     * @param canvas
+     * @param items
+     * @param radius
+     * @param start
+     * @param sweep
+     * @return the angle of the selected slice
+     */
+    private float drawSlices(Canvas canvas, List<View> items, int radius,
+            float start, float sweep) {
+        float angle = start + sweep / 2;
+        // gap between slices in degrees
+        float gap = 1f;
+        float newanchor = 0f;
+        for (View item : items) {
+            if (mDirty) {
+                item.measure(item.getLayoutParams().width,
+                        item.getLayoutParams().height);
+                int w = item.getMeasuredWidth();
+                int h = item.getMeasuredHeight();
+                int x = (int) (radius * Math.sin(angle));
+                int y =  mCenter.y - (int) (radius * Math.cos(angle)) - h / 2;
+                if (onTheLeft()) {
+                    x = mCenter.x + x - w / 2;
+                } else {
+                    x = mCenter.x - x - w / 2;
+                }
+                item.layout(x, y, x + w, y + h);
+            }
+            float itemstart = angle - sweep / 2;
+            int inner = radius - mRadiusInc / 2;
+            int outer = radius + mRadiusInc / 2;
+            Path slice = makeSlice(getDegrees(itemstart) - gap,
+                    getDegrees(itemstart + sweep) + gap,
+                    outer, inner, mCenter);
+            MenuTag tag = (MenuTag) item.getTag();
+            tag.start = itemstart;
+            tag.sweep = sweep;
+            tag.inner = inner;
+            tag.outer = outer;
+
+            Paint p = item.isPressed() ? mSelectedPaint : mPaint;
+            canvas.drawPath(slice, p);
+            int state = canvas.save();
+            if (onTheLeft()) {
+                canvas.scale(-1, 1);
+            }
+            canvas.translate(item.getX(), item.getY());
+            item.draw(canvas);
+            canvas.restoreToCount(state);
+            if (mStack.contains(item)) {
+                // item is anchor for sub menu
+                newanchor = angle;
+            }
+            angle += sweep;
+        }
+        return newanchor;
+    }
+
+    /**
+     * converts a
+     * @param angle from 0..PI to Android degrees (clockwise starting at 3 o'clock)
+     * @return skia angle
+     */
+    private float getDegrees(double angle) {
+        return (float) (270 - 180 * angle / Math.PI);
+    }
+
+    private Path makeSlice(float startangle, float endangle, int outerradius,
+            int innerradius, Point center) {
+        RectF bb = new RectF(center.x - outerradius, center.y - outerradius,
+                center.x + outerradius, center.y + outerradius);
+        RectF bbi = new RectF(center.x - innerradius, center.y - innerradius,
+                center.x + innerradius, center.y + innerradius);
+        Path path = new Path();
+        path.arcTo(bb, startangle, endangle - startangle, true);
+        path.arcTo(bbi, endangle, startangle - endangle);
+        path.close();
+        return path;
+    }
+
+    /**
+     * all angles are 0 .. MATH.PI where 0 points up, and rotate counterclockwise
+     * set the startangle and slice sweep in result
+     * @param anchorangle : angle at which the menu is anchored
+     * @param nslices
+     * @param result : x : start, y : sweep
+     */
+    private void setGeometry(float anchorangle, int nslices, PointF result) {
+        float span = (float) Math.min(anchorangle, Math.PI - anchorangle);
+        float sweep = 2 * span / (nslices + 1);
+        result.x = anchorangle - span + sweep / 2;
+        result.y = sweep;
+    }
+
+    // touch handling for pie
+
+    View mCurrentView;
+    Rect mHitRect = new Rect();
+
+    @Override
+    public boolean onTouchEvent(MotionEvent evt) {
+        float x = evt.getX();
+        float y = evt.getY();
+        int action = evt.getActionMasked();
+        int edges = evt.getEdgeFlags();
+        if (MotionEvent.ACTION_DOWN == action) {
+            if ((x > getWidth() - mSlop) || (x < mSlop)) {
+                setCenter((int) x, (int) y);
+                show(true);
+                return true;
+            }
+        } else if (MotionEvent.ACTION_UP == action) {
+            if (mOpen) {
+                View v = mCurrentView;
+                deselect();
+                if (v != null) {
+                    v.performClick();
+                }
+                show(false);
+                return true;
+            }
+        } else if (MotionEvent.ACTION_CANCEL == action) {
+            if (mOpen) {
+                show(false);
+            }
+            deselect();
+            return false;
+        } else if (MotionEvent.ACTION_MOVE == action) {
+            View v = findView((int) x, (int) y);
+            if (mCurrentView != v) {
+                onEnter(v);
+                invalidate();
+            }
+        }
+        // always re-dispatch event
+        return false;
+    }
+
+    /**
+     * enter a slice for a view
+     * updates model only
+     * @param view
+     */
+    private void onEnter(View view) {
+        // deselect
+        if (mCurrentView != null) {
+            if (getLevel(mCurrentView) >= getLevel(view)) {
+                mCurrentView.setPressed(false);
+            }
+        }
+        if (view != null) {
+            // clear up stack
+            MenuTag tag = (MenuTag) view.getTag();
+            int i = mStack.size() - 1;
+            while (i > 0) {
+                View v = mStack.get(i);
+                if (((MenuTag) v.getTag()).level >= tag.level) {
+                    v.setPressed(false);
+                    mStack.remove(i);
+                } else {
+                    break;
+                }
+                i--;
+            }
+            List<View> items = mMenu.get(view);
+            if (items != null) {
+                mStack.add(view);
+                mDirty = true;
+            }
+            view.setPressed(true);
+        }
+        mCurrentView = view;
+    }
+
+    private void deselect() {
+        if (mCurrentView != null) {
+            mCurrentView.setPressed(false);
+        }
+        mCurrentView = null;
+    }
+
+    private int getLevel(View v) {
+        if (v == null) return -1;
+        return ((MenuTag) v.getTag()).level;
+    }
+
+    private View findView(int x, int y) {
+        // get angle and radius from x/y
+        float angle = (float) Math.PI / 2;
+        x = mCenter.x - x;
+        if (mCenter.x < mSlop) {
+            x = -x;
+        }
+        y = mCenter.y - y;
+        float dist = (float) Math.sqrt(x * x + y * y);
+        if (y > 0) {
+            angle = (float) Math.asin(x / dist);
+        } else if (y < 0) {
+            angle = (float) (Math.PI - Math.asin(x / dist ));
+        }
+        // find the matching item:
+        for (View parent : mStack) {
+            List<View> subs = mMenu.get(parent);
+            if (subs != null) {
+                for (View item : subs) {
+                    MenuTag tag = (MenuTag) item.getTag();
+                    if ((tag.inner < dist)
+                            && (tag.outer > dist)
+                            && (tag.start < angle)
+                            && (tag.start + tag.sweep > angle)) {
+                        return item;
+                    }
+                }
+            }
+        }
+        return null;
+    }
+
+    class MenuTag {
+
+        int level;
+        float start;
+        float sweep;
+        int inner;
+        int outer;
+
+        public MenuTag(int l) {
+            level = l;
+        }
+
+    }
+
+}