/*
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* Copyright (C) 2011 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.launcher3;
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import static com.android.launcher3.ButtonDropTarget.TOOLTIP_DEFAULT;
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import static com.android.launcher3.ButtonDropTarget.TOOLTIP_LEFT;
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import static com.android.launcher3.ButtonDropTarget.TOOLTIP_RIGHT;
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import static com.android.launcher3.anim.AlphaUpdateListener.updateVisibility;
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import android.animation.TimeInterpolator;
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import android.content.Context;
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import android.graphics.Rect;
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import android.util.AttributeSet;
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import android.view.Gravity;
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import android.view.View;
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import android.view.ViewDebug;
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import android.view.ViewPropertyAnimator;
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import android.widget.FrameLayout;
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import com.android.launcher3.anim.Interpolators;
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import com.android.launcher3.dragndrop.DragController;
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import com.android.launcher3.dragndrop.DragController.DragListener;
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import com.android.launcher3.dragndrop.DragOptions;
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/*
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* The top bar containing various drop targets: Delete/App Info/Uninstall.
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*/
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public class DropTargetBar extends FrameLayout
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implements DragListener, Insettable {
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protected static final int DEFAULT_DRAG_FADE_DURATION = 175;
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protected static final TimeInterpolator DEFAULT_INTERPOLATOR = Interpolators.ACCEL;
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private final Runnable mFadeAnimationEndRunnable =
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() -> updateVisibility(DropTargetBar.this);
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@ViewDebug.ExportedProperty(category = "launcher")
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protected boolean mDeferOnDragEnd;
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@ViewDebug.ExportedProperty(category = "launcher")
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protected boolean mVisible = false;
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private ButtonDropTarget[] mDropTargets;
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private ViewPropertyAnimator mCurrentAnimation;
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private boolean mIsVertical = true;
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public DropTargetBar(Context context, AttributeSet attrs) {
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super(context, attrs);
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}
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public DropTargetBar(Context context, AttributeSet attrs, int defStyle) {
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super(context, attrs, defStyle);
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}
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@Override
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protected void onFinishInflate() {
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super.onFinishInflate();
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mDropTargets = new ButtonDropTarget[getChildCount()];
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for (int i = 0; i < mDropTargets.length; i++) {
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mDropTargets[i] = (ButtonDropTarget) getChildAt(i);
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mDropTargets[i].setDropTargetBar(this);
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}
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}
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@Override
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public void setInsets(Rect insets) {
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FrameLayout.LayoutParams lp = (FrameLayout.LayoutParams) getLayoutParams();
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DeviceProfile grid = Launcher.getLauncher(getContext()).getDeviceProfile();
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mIsVertical = grid.isVerticalBarLayout();
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lp.leftMargin = insets.left;
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lp.topMargin = insets.top;
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lp.bottomMargin = insets.bottom;
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lp.rightMargin = insets.right;
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int tooltipLocation = TOOLTIP_DEFAULT;
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if (grid.isVerticalBarLayout()) {
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lp.width = grid.dropTargetBarSizePx;
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lp.height = grid.availableHeightPx - 2 * grid.edgeMarginPx;
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lp.gravity = grid.isSeascape() ? Gravity.RIGHT : Gravity.LEFT;
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tooltipLocation = grid.isSeascape() ? TOOLTIP_LEFT : TOOLTIP_RIGHT;
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} else {
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int gap;
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if (grid.isTablet) {
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// XXX: If the icon size changes across orientations, we will have to take
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// that into account here too.
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gap = ((grid.widthPx - 2 * grid.edgeMarginPx
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- (grid.inv.numColumns * grid.cellWidthPx))
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/ (2 * (grid.inv.numColumns + 1)))
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+ grid.edgeMarginPx;
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} else {
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gap = grid.desiredWorkspaceLeftRightMarginPx - grid.inv.defaultWidgetPadding.right;
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}
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lp.width = grid.availableWidthPx - 2 * gap;
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lp.topMargin += grid.edgeMarginPx;
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lp.height = grid.dropTargetBarSizePx;
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lp.gravity = Gravity.CENTER_HORIZONTAL | Gravity.TOP;
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}
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setLayoutParams(lp);
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for (ButtonDropTarget button : mDropTargets) {
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button.setToolTipLocation(tooltipLocation);
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}
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}
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public void setup(DragController dragController) {
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dragController.addDragListener(this);
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for (int i = 0; i < mDropTargets.length; i++) {
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dragController.addDragListener(mDropTargets[i]);
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dragController.addDropTarget(mDropTargets[i]);
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}
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}
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@Override
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protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
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int width = MeasureSpec.getSize(widthMeasureSpec);
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int height = MeasureSpec.getSize(heightMeasureSpec);
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if (mIsVertical) {
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int widthSpec = MeasureSpec.makeMeasureSpec(width, MeasureSpec.EXACTLY);
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int heightSpec = MeasureSpec.makeMeasureSpec(height, MeasureSpec.AT_MOST);
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for (ButtonDropTarget button : mDropTargets) {
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if (button.getVisibility() != GONE) {
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button.setTextVisible(false);
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button.measure(widthSpec, heightSpec);
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}
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}
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} else {
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int visibleCount = getVisibleButtonsCount();
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int availableWidth = width / visibleCount;
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boolean textVisible = true;
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for (ButtonDropTarget buttons : mDropTargets) {
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if (buttons.getVisibility() != GONE) {
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textVisible = textVisible && !buttons.isTextTruncated(availableWidth);
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}
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}
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int widthSpec = MeasureSpec.makeMeasureSpec(availableWidth, MeasureSpec.AT_MOST);
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int heightSpec = MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY);
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for (ButtonDropTarget button : mDropTargets) {
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if (button.getVisibility() != GONE) {
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button.setTextVisible(textVisible);
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button.measure(widthSpec, heightSpec);
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}
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}
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}
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setMeasuredDimension(width, height);
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}
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@Override
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protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
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if (mIsVertical) {
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int gap = getResources().getDimensionPixelSize(R.dimen.drop_target_vertical_gap);
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int start = gap;
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int end;
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for (ButtonDropTarget button : mDropTargets) {
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if (button.getVisibility() != GONE) {
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end = start + button.getMeasuredHeight();
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button.layout(0, start, button.getMeasuredWidth(), end);
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start = end + gap;
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}
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}
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} else {
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int visibleCount = getVisibleButtonsCount();
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int frameSize = (right - left) / visibleCount;
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int start = frameSize / 2;
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int halfWidth;
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for (ButtonDropTarget button : mDropTargets) {
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if (button.getVisibility() != GONE) {
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halfWidth = button.getMeasuredWidth() / 2;
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button.layout(start - halfWidth, 0,
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start + halfWidth, button.getMeasuredHeight());
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start = start + frameSize;
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}
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}
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}
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}
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private int getVisibleButtonsCount() {
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int visibleCount = 0;
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for (ButtonDropTarget buttons : mDropTargets) {
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if (buttons.getVisibility() != GONE) {
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visibleCount++;
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}
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}
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return visibleCount;
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}
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public void animateToVisibility(boolean isVisible) {
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if (mVisible != isVisible) {
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mVisible = isVisible;
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// Cancel any existing animation
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if (mCurrentAnimation != null) {
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mCurrentAnimation.cancel();
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mCurrentAnimation = null;
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}
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float finalAlpha = mVisible ? 1 : 0;
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if (Float.compare(getAlpha(), finalAlpha) != 0) {
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setVisibility(View.VISIBLE);
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mCurrentAnimation = animate().alpha(finalAlpha)
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.setInterpolator(DEFAULT_INTERPOLATOR)
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.setDuration(DEFAULT_DRAG_FADE_DURATION)
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.withEndAction(mFadeAnimationEndRunnable);
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}
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}
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}
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/*
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* DragController.DragListener implementation
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*/
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@Override
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public void onDragStart(DropTarget.DragObject dragObject, DragOptions options) {
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animateToVisibility(true);
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}
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/**
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* This is called to defer hiding the delete drop target until the drop animation has completed,
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* instead of hiding immediately when the drag has ended.
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*/
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protected void deferOnDragEnd() {
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mDeferOnDragEnd = true;
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}
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@Override
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public void onDragEnd() {
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if (!mDeferOnDragEnd) {
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animateToVisibility(false);
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} else {
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mDeferOnDragEnd = false;
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}
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}
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public ButtonDropTarget[] getDropTargets() {
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return mDropTargets;
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}
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}
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