src/com/android/launcher3/DropTargetBar.java - platform/packages/apps/Launcher3 - Git at Google

 /*
  * 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 static com.android.launcher3.ButtonDropTarget.TOOLTIP_DEFAULT;
 import static com.android.launcher3.ButtonDropTarget.TOOLTIP_LEFT;
 import static com.android.launcher3.ButtonDropTarget.TOOLTIP_RIGHT;
 import static com.android.launcher3.anim.AlphaUpdateListener.updateVisibility;

 import android.animation.TimeInterpolator;
 import android.content.Context;
 import android.graphics.Rect;
 import android.util.AttributeSet;
 import android.util.Log;
 import android.util.TypedValue;
 import android.view.Gravity;
 import android.view.View;
 import android.view.ViewDebug;
 import android.view.ViewPropertyAnimator;
 import android.widget.FrameLayout;

 import androidx.annotation.NonNull;

 import com.android.launcher3.anim.Interpolators;
 import com.android.launcher3.dragndrop.DragController;
 import com.android.launcher3.dragndrop.DragController.DragListener;
 import com.android.launcher3.dragndrop.DragOptions;
 import com.android.launcher3.testing.TestProtocol;

 /*
  * The top bar containing various drop targets: Delete/App Info/Uninstall.
  */
 public class DropTargetBar extends FrameLayout
         implements DragListener, Insettable {

     protected static final int DEFAULT_DRAG_FADE_DURATION = 175;
     protected static final TimeInterpolator DEFAULT_INTERPOLATOR = Interpolators.ACCEL;

     private final Runnable mFadeAnimationEndRunnable =
             () -> updateVisibility(DropTargetBar.this);

     @ViewDebug.ExportedProperty(category = "launcher")
     protected boolean mDeferOnDragEnd;

     @ViewDebug.ExportedProperty(category = "launcher")
     protected boolean mVisible = false;

     private ButtonDropTarget[] mDropTargets;
     private ViewPropertyAnimator mCurrentAnimation;

     private boolean mIsVertical = true;

     public DropTargetBar(Context context, AttributeSet attrs) {
         super(context, attrs);
     }

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

     @Override
     protected void onFinishInflate() {
         super.onFinishInflate();
         mDropTargets = new ButtonDropTarget[getChildCount()];
         for (int i = 0; i < mDropTargets.length; i++) {
             mDropTargets[i] = (ButtonDropTarget) getChildAt(i);
             mDropTargets[i].setDropTargetBar(this);
         }
     }

     @Override
     public void setInsets(Rect insets) {
         FrameLayout.LayoutParams lp = (FrameLayout.LayoutParams) getLayoutParams();
         DeviceProfile grid = Launcher.getLauncher(getContext()).getDeviceProfile();
         mIsVertical = grid.isVerticalBarLayout();

         lp.leftMargin = insets.left;
         lp.topMargin = insets.top;
         lp.bottomMargin = insets.bottom;
         lp.rightMargin = insets.right;
         int tooltipLocation = TOOLTIP_DEFAULT;

         if (grid.isVerticalBarLayout()) {
             lp.width = grid.dropTargetBarSizePx;
             lp.height = grid.availableHeightPx - 2 * grid.edgeMarginPx;
             lp.gravity = grid.isSeascape() ? Gravity.RIGHT : Gravity.LEFT;
             tooltipLocation = grid.isSeascape() ? TOOLTIP_LEFT : TOOLTIP_RIGHT;
         } else {
             int gap;
             if (grid.isTablet) {
                 // XXX: If the icon size changes across orientations, we will have to take
                 //      that into account here too.
                 gap = ((grid.widthPx - 2 * grid.edgeMarginPx
                         - (grid.inv.numColumns * grid.cellWidthPx))
                         / (2 * (grid.inv.numColumns + 1)))
                         + grid.edgeMarginPx;
             } else {
                 gap = getContext().getResources()
                         .getDimensionPixelSize(R.dimen.drop_target_bar_margin_horizontal);
             }
             lp.width = grid.availableWidthPx - 2 * gap;

             lp.topMargin += grid.edgeMarginPx;
             lp.height = grid.dropTargetBarSizePx;
             lp.gravity = Gravity.CENTER_HORIZONTAL | Gravity.TOP;
         }
         setLayoutParams(lp);
         for (ButtonDropTarget button : mDropTargets) {
             button.setTextSize(TypedValue.COMPLEX_UNIT_PX, grid.dropTargetTextSizePx);
             button.setToolTipLocation(tooltipLocation);
         }
     }

     public void setup(DragController dragController) {
         dragController.addDragListener(this);
         for (int i = 0; i < mDropTargets.length; i++) {
             dragController.addDragListener(mDropTargets[i]);
             dragController.addDropTarget(mDropTargets[i]);
         }
     }

     @Override
     protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
         int width = MeasureSpec.getSize(widthMeasureSpec);
         int height = MeasureSpec.getSize(heightMeasureSpec);

         int visibleCount = getVisibleButtonsCount();
         if (visibleCount == 0) {
             // do nothing
         } else if (mIsVertical) {
             int widthSpec = MeasureSpec.makeMeasureSpec(width, MeasureSpec.EXACTLY);
             int heightSpec = MeasureSpec.makeMeasureSpec(height, MeasureSpec.AT_MOST);

             for (ButtonDropTarget button : mDropTargets) {
                 if (button.getVisibility() != GONE) {
                     button.setTextVisible(false);
                     button.measure(widthSpec, heightSpec);
                 }
             }
         } else {
             int availableWidth = width / visibleCount;
             boolean textVisible = true;
             for (ButtonDropTarget buttons : mDropTargets) {
                 if (buttons.getVisibility() != GONE) {
                     textVisible = textVisible && !buttons.isTextTruncated(availableWidth);
                 }
             }

             int widthSpec = MeasureSpec.makeMeasureSpec(availableWidth, MeasureSpec.AT_MOST);
             int heightSpec = MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY);
             for (ButtonDropTarget button : mDropTargets) {
                 if (button.getVisibility() != GONE) {
                     button.setTextVisible(textVisible);
                     button.measure(widthSpec, heightSpec);
                 }
             }
         }
         setMeasuredDimension(width, height);
     }

     @Override
     protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
         int visibleCount = getVisibleButtonsCount();
         if (visibleCount == 0) {
             // do nothing
         } else if (mIsVertical) {
             int gap = getResources().getDimensionPixelSize(R.dimen.drop_target_vertical_gap);
             int start = gap;
             int end;

             for (ButtonDropTarget button : mDropTargets) {
                 if (button.getVisibility() != GONE) {
                     end = start + button.getMeasuredHeight();
                     button.layout(0, start, button.getMeasuredWidth(), end);
                     start = end + gap;
                 }
             }
         } else {
             int frameSize = (right - left) / visibleCount;

             int start = frameSize / 2;
             int halfWidth;
             for (ButtonDropTarget button : mDropTargets) {
                 if (button.getVisibility() != GONE) {
                     halfWidth = button.getMeasuredWidth() / 2;
                     button.layout(start - halfWidth, 0,
                             start + halfWidth, button.getMeasuredHeight());
                     start = start + frameSize;
                 }
             }
         }
     }

     private int getVisibleButtonsCount() {
         int visibleCount = 0;
         for (ButtonDropTarget buttons : mDropTargets) {
             if (buttons.getVisibility() != GONE) {
                 visibleCount++;
             }
         }
         return visibleCount;
     }

     public void animateToVisibility(boolean isVisible) {
         if (TestProtocol.sDebugTracing) {
             Log.d(TestProtocol.NO_DROP_TARGET, "8");
         }
         if (mVisible != isVisible) {
             mVisible = isVisible;

             // Cancel any existing animation
             if (mCurrentAnimation != null) {
                 mCurrentAnimation.cancel();
                 mCurrentAnimation = null;
             }

             float finalAlpha = mVisible ? 1 : 0;
             if (Float.compare(getAlpha(), finalAlpha) != 0) {
                 setVisibility(View.VISIBLE);
                 mCurrentAnimation = animate().alpha(finalAlpha)
                         .setInterpolator(DEFAULT_INTERPOLATOR)
                         .setDuration(DEFAULT_DRAG_FADE_DURATION)
                         .withEndAction(mFadeAnimationEndRunnable);
             }

         }
     }

     /*
      * DragController.DragListener implementation
      */
     @Override
     public void onDragStart(DropTarget.DragObject dragObject, DragOptions options) {
         if (TestProtocol.sDebugTracing) {
             Log.d(TestProtocol.NO_DROP_TARGET, "7");
         }
         animateToVisibility(true);
     }

     /**
      * This is called to defer hiding the delete drop target until the drop animation has completed,
      * instead of hiding immediately when the drag has ended.
      */
     protected void deferOnDragEnd() {
         mDeferOnDragEnd = true;
     }

     @Override
     public void onDragEnd() {
         if (!mDeferOnDragEnd) {
             animateToVisibility(false);
         } else {
             mDeferOnDragEnd = false;
         }
     }

     public ButtonDropTarget[] getDropTargets() {
         return mDropTargets;
     }

     @Override
     protected void onVisibilityChanged(@NonNull View changedView, int visibility) {
         super.onVisibilityChanged(changedView, visibility);
         if (TestProtocol.sDebugTracing) {
             if (visibility == VISIBLE) {
                 Log.d(TestProtocol.NO_DROP_TARGET, "9");
             } else {
                 Log.d(TestProtocol.NO_DROP_TARGET, "Hiding drop target", new Exception());
             }
         }
     }
 }
	/*
	* 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 static com.android.launcher3.ButtonDropTarget.TOOLTIP_DEFAULT;
	import static com.android.launcher3.ButtonDropTarget.TOOLTIP_LEFT;
	import static com.android.launcher3.ButtonDropTarget.TOOLTIP_RIGHT;
	import static com.android.launcher3.anim.AlphaUpdateListener.updateVisibility;

	import android.animation.TimeInterpolator;
	import android.content.Context;
	import android.graphics.Rect;
	import android.util.AttributeSet;
	import android.util.Log;
	import android.util.TypedValue;
	import android.view.Gravity;
	import android.view.View;
	import android.view.ViewDebug;
	import android.view.ViewPropertyAnimator;
	import android.widget.FrameLayout;

	import androidx.annotation.NonNull;

	import com.android.launcher3.anim.Interpolators;
	import com.android.launcher3.dragndrop.DragController;
	import com.android.launcher3.dragndrop.DragController.DragListener;
	import com.android.launcher3.dragndrop.DragOptions;
	import com.android.launcher3.testing.TestProtocol;

	/*
	* The top bar containing various drop targets: Delete/App Info/Uninstall.
	*/
	public class DropTargetBar extends FrameLayout
	implements DragListener, Insettable {

	protected static final int DEFAULT_DRAG_FADE_DURATION = 175;
	protected static final TimeInterpolator DEFAULT_INTERPOLATOR = Interpolators.ACCEL;

	private final Runnable mFadeAnimationEndRunnable =
	() -> updateVisibility(DropTargetBar.this);

	@ViewDebug.ExportedProperty(category = "launcher")
	protected boolean mDeferOnDragEnd;

	@ViewDebug.ExportedProperty(category = "launcher")
	protected boolean mVisible = false;

	private ButtonDropTarget[] mDropTargets;
	private ViewPropertyAnimator mCurrentAnimation;

	private boolean mIsVertical = true;

	public DropTargetBar(Context context, AttributeSet attrs) {
	super(context, attrs);
	}

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

	@Override
	protected void onFinishInflate() {
	super.onFinishInflate();
	mDropTargets = new ButtonDropTarget[getChildCount()];
	for (int i = 0; i < mDropTargets.length; i++) {
	mDropTargets[i] = (ButtonDropTarget) getChildAt(i);
	mDropTargets[i].setDropTargetBar(this);
	}
	}

	@Override
	public void setInsets(Rect insets) {
	FrameLayout.LayoutParams lp = (FrameLayout.LayoutParams) getLayoutParams();
	DeviceProfile grid = Launcher.getLauncher(getContext()).getDeviceProfile();
	mIsVertical = grid.isVerticalBarLayout();

	lp.leftMargin = insets.left;
	lp.topMargin = insets.top;
	lp.bottomMargin = insets.bottom;
	lp.rightMargin = insets.right;
	int tooltipLocation = TOOLTIP_DEFAULT;

	if (grid.isVerticalBarLayout()) {
	lp.width = grid.dropTargetBarSizePx;
	lp.height = grid.availableHeightPx - 2 * grid.edgeMarginPx;
	lp.gravity = grid.isSeascape() ? Gravity.RIGHT : Gravity.LEFT;
	tooltipLocation = grid.isSeascape() ? TOOLTIP_LEFT : TOOLTIP_RIGHT;
	} else {
	int gap;
	if (grid.isTablet) {
	// XXX: If the icon size changes across orientations, we will have to take
	// that into account here too.
	gap = ((grid.widthPx - 2 * grid.edgeMarginPx
	- (grid.inv.numColumns * grid.cellWidthPx))
	/ (2 * (grid.inv.numColumns + 1)))
	+ grid.edgeMarginPx;
	} else {
	gap = getContext().getResources()
	.getDimensionPixelSize(R.dimen.drop_target_bar_margin_horizontal);
	}
	lp.width = grid.availableWidthPx - 2 * gap;

	lp.topMargin += grid.edgeMarginPx;
	lp.height = grid.dropTargetBarSizePx;
	lp.gravity = Gravity.CENTER_HORIZONTAL \| Gravity.TOP;
	}
	setLayoutParams(lp);
	for (ButtonDropTarget button : mDropTargets) {
	button.setTextSize(TypedValue.COMPLEX_UNIT_PX, grid.dropTargetTextSizePx);
	button.setToolTipLocation(tooltipLocation);
	}
	}

	public void setup(DragController dragController) {
	dragController.addDragListener(this);
	for (int i = 0; i < mDropTargets.length; i++) {
	dragController.addDragListener(mDropTargets[i]);
	dragController.addDropTarget(mDropTargets[i]);
	}
	}

	@Override
	protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
	int width = MeasureSpec.getSize(widthMeasureSpec);
	int height = MeasureSpec.getSize(heightMeasureSpec);

	int visibleCount = getVisibleButtonsCount();
	if (visibleCount == 0) {
	// do nothing
	} else if (mIsVertical) {
	int widthSpec = MeasureSpec.makeMeasureSpec(width, MeasureSpec.EXACTLY);
	int heightSpec = MeasureSpec.makeMeasureSpec(height, MeasureSpec.AT_MOST);

	for (ButtonDropTarget button : mDropTargets) {
	if (button.getVisibility() != GONE) {
	button.setTextVisible(false);
	button.measure(widthSpec, heightSpec);
	}
	}
	} else {
	int availableWidth = width / visibleCount;
	boolean textVisible = true;
	for (ButtonDropTarget buttons : mDropTargets) {
	if (buttons.getVisibility() != GONE) {
	textVisible = textVisible && !buttons.isTextTruncated(availableWidth);
	}
	}

	int widthSpec = MeasureSpec.makeMeasureSpec(availableWidth, MeasureSpec.AT_MOST);
	int heightSpec = MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY);
	for (ButtonDropTarget button : mDropTargets) {
	if (button.getVisibility() != GONE) {
	button.setTextVisible(textVisible);
	button.measure(widthSpec, heightSpec);
	}
	}
	}
	setMeasuredDimension(width, height);
	}

	@Override
	protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
	int visibleCount = getVisibleButtonsCount();
	if (visibleCount == 0) {
	// do nothing
	} else if (mIsVertical) {
	int gap = getResources().getDimensionPixelSize(R.dimen.drop_target_vertical_gap);
	int start = gap;
	int end;

	for (ButtonDropTarget button : mDropTargets) {
	if (button.getVisibility() != GONE) {
	end = start + button.getMeasuredHeight();
	button.layout(0, start, button.getMeasuredWidth(), end);
	start = end + gap;
	}
	}
	} else {
	int frameSize = (right - left) / visibleCount;

	int start = frameSize / 2;
	int halfWidth;
	for (ButtonDropTarget button : mDropTargets) {
	if (button.getVisibility() != GONE) {
	halfWidth = button.getMeasuredWidth() / 2;
	button.layout(start - halfWidth, 0,
	start + halfWidth, button.getMeasuredHeight());
	start = start + frameSize;
	}
	}
	}
	}

	private int getVisibleButtonsCount() {
	int visibleCount = 0;
	for (ButtonDropTarget buttons : mDropTargets) {
	if (buttons.getVisibility() != GONE) {
	visibleCount++;
	}
	}
	return visibleCount;
	}

	public void animateToVisibility(boolean isVisible) {
	if (TestProtocol.sDebugTracing) {
	Log.d(TestProtocol.NO_DROP_TARGET, "8");
	}
	if (mVisible != isVisible) {
	mVisible = isVisible;

	// Cancel any existing animation
	if (mCurrentAnimation != null) {
	mCurrentAnimation.cancel();
	mCurrentAnimation = null;
	}

	float finalAlpha = mVisible ? 1 : 0;
	if (Float.compare(getAlpha(), finalAlpha) != 0) {
	setVisibility(View.VISIBLE);
	mCurrentAnimation = animate().alpha(finalAlpha)
	.setInterpolator(DEFAULT_INTERPOLATOR)
	.setDuration(DEFAULT_DRAG_FADE_DURATION)
	.withEndAction(mFadeAnimationEndRunnable);
	}

	}
	}

	/*
	* DragController.DragListener implementation
	*/
	@Override
	public void onDragStart(DropTarget.DragObject dragObject, DragOptions options) {
	if (TestProtocol.sDebugTracing) {
	Log.d(TestProtocol.NO_DROP_TARGET, "7");
	}
	animateToVisibility(true);
	}

	/**
	* This is called to defer hiding the delete drop target until the drop animation has completed,
	* instead of hiding immediately when the drag has ended.
	*/
	protected void deferOnDragEnd() {
	mDeferOnDragEnd = true;
	}

	@Override
	public void onDragEnd() {
	if (!mDeferOnDragEnd) {
	animateToVisibility(false);
	} else {
	mDeferOnDragEnd = false;
	}
	}

	public ButtonDropTarget[] getDropTargets() {
	return mDropTargets;
	}

	@Override
	protected void onVisibilityChanged(@NonNull View changedView, int visibility) {
	super.onVisibilityChanged(changedView, visibility);
	if (TestProtocol.sDebugTracing) {
	if (visibility == VISIBLE) {
	Log.d(TestProtocol.NO_DROP_TARGET, "9");
	} else {
	Log.d(TestProtocol.NO_DROP_TARGET, "Hiding drop target", new Exception());
	}
	}
	}
	}