| /* |
| * 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.launcher3; |
| |
| import static android.view.ViewGroup.LayoutParams.WRAP_CONTENT; |
| |
| import static com.android.launcher3.LauncherState.NORMAL; |
| |
| import android.animation.AnimatorSet; |
| import android.content.Context; |
| import android.content.res.ColorStateList; |
| import android.content.res.Resources; |
| import android.graphics.Rect; |
| import android.graphics.drawable.Drawable; |
| import android.text.TextUtils; |
| import android.util.AttributeSet; |
| import android.util.Property; |
| import android.view.LayoutInflater; |
| import android.view.View; |
| import android.view.View.OnClickListener; |
| import android.view.accessibility.AccessibilityEvent; |
| import android.widget.PopupWindow; |
| import android.widget.TextView; |
| |
| import com.android.launcher3.anim.Interpolators; |
| import com.android.launcher3.dragndrop.DragController; |
| import com.android.launcher3.dragndrop.DragLayer; |
| import com.android.launcher3.dragndrop.DragOptions; |
| import com.android.launcher3.model.data.ItemInfo; |
| |
| /** |
| * Implements a DropTarget. |
| */ |
| public abstract class ButtonDropTarget extends TextView |
| implements DropTarget, DragController.DragListener, OnClickListener { |
| |
| private static final Property<ButtonDropTarget, Integer> TEXT_COLOR = |
| new Property<ButtonDropTarget, Integer>(Integer.TYPE, "textColor") { |
| |
| @Override |
| public Integer get(ButtonDropTarget target) { |
| return target.getTextColor(); |
| } |
| |
| @Override |
| public void set(ButtonDropTarget target, Integer value) { |
| target.setTextColor(value); |
| } |
| }; |
| |
| private static final int[] sTempCords = new int[2]; |
| private static final int DRAG_VIEW_DROP_DURATION = 285; |
| private static final float DRAG_VIEW_HOVER_OVER_OPACITY = 0.65f; |
| |
| public static final int TOOLTIP_DEFAULT = 0; |
| public static final int TOOLTIP_LEFT = 1; |
| public static final int TOOLTIP_RIGHT = 2; |
| |
| protected final Launcher mLauncher; |
| |
| private int mBottomDragPadding; |
| protected DropTargetBar mDropTargetBar; |
| |
| /** Whether this drop target is active for the current drag */ |
| protected boolean mActive; |
| /** Whether an accessible drag is in progress */ |
| private boolean mAccessibleDrag; |
| /** An item must be dragged at least this many pixels before this drop target is enabled. */ |
| private final int mDragDistanceThreshold; |
| |
| protected CharSequence mText; |
| protected ColorStateList mOriginalTextColor; |
| protected Drawable mDrawable; |
| private boolean mTextVisible = true; |
| |
| private PopupWindow mToolTip; |
| private int mToolTipLocation; |
| |
| private AnimatorSet mCurrentColorAnim; |
| |
| public ButtonDropTarget(Context context, AttributeSet attrs) { |
| this(context, attrs, 0); |
| } |
| |
| public ButtonDropTarget(Context context, AttributeSet attrs, int defStyle) { |
| super(context, attrs, defStyle); |
| mLauncher = Launcher.getLauncher(context); |
| |
| Resources resources = getResources(); |
| mBottomDragPadding = resources.getDimensionPixelSize(R.dimen.drop_target_drag_padding); |
| mDragDistanceThreshold = resources.getDimensionPixelSize(R.dimen.drag_distanceThreshold); |
| } |
| |
| @Override |
| protected void onFinishInflate() { |
| super.onFinishInflate(); |
| mText = getText(); |
| mOriginalTextColor = getTextColors(); |
| setContentDescription(mText); |
| } |
| |
| protected void updateText(int resId) { |
| setText(resId); |
| mText = getText(); |
| setContentDescription(mText); |
| } |
| |
| protected void setDrawable(int resId) { |
| // We do not set the drawable in the xml as that inflates two drawables corresponding to |
| // drawableLeft and drawableStart. |
| if (mTextVisible) { |
| setCompoundDrawablesRelativeWithIntrinsicBounds(resId, 0, 0, 0); |
| mDrawable = getCompoundDrawablesRelative()[0]; |
| } else { |
| setCompoundDrawablesRelativeWithIntrinsicBounds(0, resId, 0, 0); |
| mDrawable = getCompoundDrawablesRelative()[1]; |
| } |
| } |
| |
| public void setDropTargetBar(DropTargetBar dropTargetBar) { |
| mDropTargetBar = dropTargetBar; |
| } |
| |
| private void hideTooltip() { |
| if (mToolTip != null) { |
| mToolTip.dismiss(); |
| mToolTip = null; |
| } |
| } |
| |
| @Override |
| public final void onDragEnter(DragObject d) { |
| if (!mAccessibleDrag && !mTextVisible) { |
| // Show tooltip |
| hideTooltip(); |
| |
| TextView message = (TextView) LayoutInflater.from(getContext()).inflate( |
| R.layout.drop_target_tool_tip, null); |
| message.setText(mText); |
| |
| mToolTip = new PopupWindow(message, WRAP_CONTENT, WRAP_CONTENT); |
| int x = 0, y = 0; |
| if (mToolTipLocation != TOOLTIP_DEFAULT) { |
| y = -getMeasuredHeight(); |
| message.measure(MeasureSpec.UNSPECIFIED, MeasureSpec.UNSPECIFIED); |
| if (mToolTipLocation == TOOLTIP_LEFT) { |
| x = - getMeasuredWidth() - message.getMeasuredWidth() / 2; |
| } else { |
| x = getMeasuredWidth() / 2 + message.getMeasuredWidth() / 2; |
| } |
| } |
| mToolTip.showAsDropDown(this, x, y); |
| } |
| |
| d.dragView.setAlpha(DRAG_VIEW_HOVER_OVER_OPACITY); |
| if (d.stateAnnouncer != null) { |
| d.stateAnnouncer.cancel(); |
| } |
| sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_SELECTED); |
| } |
| |
| @Override |
| public void onDragOver(DragObject d) { |
| // Do nothing |
| } |
| |
| @Override |
| public final void onDragExit(DragObject d) { |
| hideTooltip(); |
| |
| if (!d.dragComplete) { |
| d.dragView.setAlpha(1f); |
| } else { |
| d.dragView.setAlpha(DRAG_VIEW_HOVER_OVER_OPACITY); |
| } |
| } |
| |
| @Override |
| public void onDragStart(DropTarget.DragObject dragObject, DragOptions options) { |
| mActive = !options.isKeyboardDrag && supportsDrop(dragObject.dragInfo); |
| mDrawable.setColorFilter(null); |
| if (mCurrentColorAnim != null) { |
| mCurrentColorAnim.cancel(); |
| mCurrentColorAnim = null; |
| } |
| setTextColor(mOriginalTextColor); |
| setVisibility(mActive ? View.VISIBLE : View.GONE); |
| |
| mAccessibleDrag = options.isAccessibleDrag; |
| setOnClickListener(mAccessibleDrag ? this : null); |
| } |
| |
| @Override |
| public final boolean acceptDrop(DragObject dragObject) { |
| return supportsDrop(dragObject.dragInfo); |
| } |
| |
| protected abstract boolean supportsDrop(ItemInfo info); |
| |
| public abstract boolean supportsAccessibilityDrop(ItemInfo info, View view); |
| |
| @Override |
| public boolean isDropEnabled() { |
| return mActive && (mAccessibleDrag || |
| mLauncher.getDragController().getDistanceDragged() >= mDragDistanceThreshold); |
| } |
| |
| @Override |
| public void onDragEnd() { |
| mActive = false; |
| setOnClickListener(null); |
| } |
| |
| /** |
| * On drop animate the dropView to the icon. |
| */ |
| @Override |
| public void onDrop(final DragObject d, final DragOptions options) { |
| if (options.isFlingToDelete) { |
| // FlingAnimation handles the animation and then calls completeDrop(). |
| return; |
| } |
| final DragLayer dragLayer = mLauncher.getDragLayer(); |
| final Rect from = new Rect(); |
| dragLayer.getViewRectRelativeToSelf(d.dragView, from); |
| |
| final Rect to = getIconRect(d); |
| final float scale = (float) to.width() / from.width(); |
| d.dragView.detachContentView(/* reattachToPreviousParent= */ true); |
| mDropTargetBar.deferOnDragEnd(); |
| |
| Runnable onAnimationEndRunnable = () -> { |
| completeDrop(d); |
| mDropTargetBar.onDragEnd(); |
| mLauncher.getStateManager().goToState(NORMAL); |
| }; |
| |
| dragLayer.animateView(d.dragView, from, to, scale, 1f, 1f, 0.1f, 0.1f, |
| DRAG_VIEW_DROP_DURATION, |
| Interpolators.DEACCEL_2, Interpolators.LINEAR, onAnimationEndRunnable, |
| DragLayer.ANIMATION_END_DISAPPEAR, null); |
| } |
| |
| public abstract int getAccessibilityAction(); |
| |
| @Override |
| public void prepareAccessibilityDrop() { } |
| |
| public abstract void onAccessibilityDrop(View view, ItemInfo item); |
| |
| public abstract void completeDrop(DragObject d); |
| |
| @Override |
| public void getHitRectRelativeToDragLayer(android.graphics.Rect outRect) { |
| super.getHitRect(outRect); |
| outRect.bottom += mBottomDragPadding; |
| |
| sTempCords[0] = sTempCords[1] = 0; |
| mLauncher.getDragLayer().getDescendantCoordRelativeToSelf(this, sTempCords); |
| outRect.offsetTo(sTempCords[0], sTempCords[1]); |
| } |
| |
| public Rect getIconRect(DragObject dragObject) { |
| int viewWidth = dragObject.dragView.getMeasuredWidth(); |
| int viewHeight = dragObject.dragView.getMeasuredHeight(); |
| int drawableWidth = mDrawable.getIntrinsicWidth(); |
| int drawableHeight = mDrawable.getIntrinsicHeight(); |
| DragLayer dragLayer = mLauncher.getDragLayer(); |
| |
| // Find the rect to animate to (the view is center aligned) |
| Rect to = new Rect(); |
| dragLayer.getViewRectRelativeToSelf(this, to); |
| |
| final int width = drawableWidth; |
| final int height = drawableHeight; |
| |
| final int left; |
| final int right; |
| |
| if (Utilities.isRtl(getResources())) { |
| right = to.right - getPaddingRight(); |
| left = right - width; |
| } else { |
| left = to.left + getPaddingLeft(); |
| right = left + width; |
| } |
| |
| final int top = to.top + (getMeasuredHeight() - height) / 2; |
| final int bottom = top + height; |
| |
| to.set(left, top, right, bottom); |
| |
| // Center the destination rect about the trash icon |
| final int xOffset = -(viewWidth - width) / 2; |
| final int yOffset = -(viewHeight - height) / 2; |
| to.offset(xOffset, yOffset); |
| |
| return to; |
| } |
| |
| @Override |
| public void onClick(View v) { |
| mLauncher.getAccessibilityDelegate().handleAccessibleDrop(this, null, null); |
| } |
| |
| public int getTextColor() { |
| return getTextColors().getDefaultColor(); |
| } |
| |
| public void setTextVisible(boolean isVisible) { |
| CharSequence newText = isVisible ? mText : ""; |
| if (mTextVisible != isVisible || !TextUtils.equals(newText, getText())) { |
| mTextVisible = isVisible; |
| setText(newText); |
| if (mTextVisible) { |
| setCompoundDrawablesRelativeWithIntrinsicBounds(mDrawable, null, null, null); |
| } else { |
| setCompoundDrawablesRelativeWithIntrinsicBounds(null, mDrawable, null, null); |
| } |
| } |
| } |
| |
| public void setToolTipLocation(int location) { |
| mToolTipLocation = location; |
| hideTooltip(); |
| } |
| |
| public boolean isTextTruncated(int availableWidth) { |
| availableWidth -= (getPaddingLeft() + getPaddingRight() + mDrawable.getIntrinsicWidth() |
| + getCompoundDrawablePadding()); |
| CharSequence displayedText = TextUtils.ellipsize(mText, getPaint(), availableWidth, |
| TextUtils.TruncateAt.END); |
| return !mText.equals(displayedText); |
| } |
| } |