src/com/android/launcher3/Hotseat.java

/*
 * Copyright (C) 2011 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;

import android.content.Context;
import android.content.res.Configuration;
import android.content.res.Resources;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.widget.FrameLayout;
import android.widget.TextView;

public class Hotseat extends FrameLayout {

    private CellLayout mContent;

    private Launcher mLauncher;

    private int mAllAppsButtonRank;

    private boolean mTransposeLayoutWithOrientation;
    private boolean mIsLandscape;

    public Hotseat(Context context) {
        this(context, null);
    }

    public Hotseat(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }

    public Hotseat(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);

        Resources r = context.getResources();
        mTransposeLayoutWithOrientation = 
                r.getBoolean(R.bool.hotseat_transpose_layout_with_orientation);
        mIsLandscape = context.getResources().getConfiguration().orientation ==
            Configuration.ORIENTATION_LANDSCAPE;
    }

    public void setup(Launcher launcher) {
        mLauncher = launcher;
    }

    CellLayout getLayout() {
        return mContent;
    }

    /**
     * Registers the specified listener on the cell layout of the hotseat.
     */
    @Override
    public void setOnLongClickListener(OnLongClickListener l) {
        mContent.setOnLongClickListener(l);
    }
  
    private boolean hasVerticalHotseat() {
        return (mIsLandscape && mTransposeLayoutWithOrientation);
    }

    /* Get the orientation invariant order of the item in the hotseat for persistence. */
    int getOrderInHotseat(int x, int y) {
        return hasVerticalHotseat() ? (mContent.getCountY() - y - 1) : x;
    }

    /* Get the orientation specific coordinates given an invariant order in the hotseat. */
    int getCellXFromOrder(int rank) {
        return hasVerticalHotseat() ? 0 : rank;
    }

    int getCellYFromOrder(int rank) {
        return hasVerticalHotseat() ? (mContent.getCountY() - (rank + 1)) : 0;
    }

    public int getAllAppsButtonRank() {
        return mAllAppsButtonRank;
    }

    public boolean isAllAppsButtonRank(int rank) {
        return rank == mAllAppsButtonRank;
    }

    /** This returns the coordinates of an app in a given cell, relative to the DragLayer */
    Rect getCellCoordinates(int cellX, int cellY) {
        Rect coords = new Rect();
        mContent.cellToRect(cellX, cellY, 1, 1, coords);
        int[] hotseatInParent = new int[2];
        Utilities.getDescendantCoordRelativeToParent(this, mLauncher.getDragLayer(),
                hotseatInParent, false);
        coords.offset(hotseatInParent[0], hotseatInParent[1]);

        // Center the icon
        int cWidth = mContent.getShortcutsAndWidgets().getCellContentWidth();
        int cHeight = mContent.getShortcutsAndWidgets().getCellContentHeight();
        int cellPaddingX = (int) Math.max(0, ((coords.width() - cWidth) / 2f));
        int cellPaddingY = (int) Math.max(0, ((coords.height() - cHeight) / 2f));
        coords.offset(cellPaddingX, cellPaddingY);

        return coords;
    }

    @Override
    protected void onFinishInflate() {
        super.onFinishInflate();
        LauncherAppState app = LauncherAppState.getInstance();
        DeviceProfile grid = app.getDynamicGrid().getDeviceProfile();

        mAllAppsButtonRank = grid.hotseatAllAppsRank;
        mContent = (CellLayout) findViewById(R.id.layout);
        if (grid.isLandscape && !grid.isLargeTablet()) {
            mContent.setGridSize(1, (int) grid.numHotseatIcons);
        } else {
            mContent.setGridSize((int) grid.numHotseatIcons, 1);
        }
        mContent.setIsHotseat(true);

        resetLayout();
    }

    void resetLayout() {
        mContent.removeAllViewsInLayout();

        // Add the Apps button
        Context context = getContext();

        LayoutInflater inflater = LayoutInflater.from(context);
        TextView allAppsButton = (TextView)
                inflater.inflate(R.layout.all_apps_button, mContent, false);
        Drawable d = context.getResources().getDrawable(R.drawable.all_apps_button_icon);

        Utilities.resizeIconDrawable(d);
        allAppsButton.setCompoundDrawables(null, d, null, null);

        allAppsButton.setContentDescription(context.getString(R.string.all_apps_button_label));
        allAppsButton.setOnKeyListener(new HotseatIconKeyEventListener());
        if (mLauncher != null) {
            allAppsButton.setOnTouchListener(mLauncher.getHapticFeedbackTouchListener());
            mLauncher.setAllAppsButton(allAppsButton);
            allAppsButton.setOnClickListener(mLauncher);
            allAppsButton.setOnFocusChangeListener(mLauncher.mFocusHandler);
        }

        // Note: We do this to ensure that the hotseat is always laid out in the orientation of
        // the hotseat in order regardless of which orientation they were added
        int x = getCellXFromOrder(mAllAppsButtonRank);
        int y = getCellYFromOrder(mAllAppsButtonRank);
        CellLayout.LayoutParams lp = new CellLayout.LayoutParams(x,y,1,1);
        lp.canReorder = false;
        mContent.addViewToCellLayout(allAppsButton, -1, allAppsButton.getId(), lp, true);
    }

    @Override
    public boolean onInterceptTouchEvent(MotionEvent ev) {
        // We don't want any clicks to go through to the hotseat unless the workspace is in
        // the normal state.
        if (mLauncher.getWorkspace().workspaceInModalState()) {
            return true;
        }
        return false;
    }
}