diff options
Diffstat (limited to 'src/com/android/launcher3/CellLayout.java')
| -rw-r--r-- | src/com/android/launcher3/CellLayout.java | 306 |
1 files changed, 294 insertions, 12 deletions
diff --git a/src/com/android/launcher3/CellLayout.java b/src/com/android/launcher3/CellLayout.java index a3500aa82..c57090d7c 100644 --- a/src/com/android/launcher3/CellLayout.java +++ b/src/com/android/launcher3/CellLayout.java @@ -22,6 +22,7 @@ import android.animation.AnimatorSet; import android.animation.TimeInterpolator; import android.animation.ValueAnimator; import android.animation.ValueAnimator.AnimatorUpdateListener; +import android.annotation.TargetApi; import android.content.Context; import android.content.res.Resources; import android.content.res.TypedArray; @@ -33,25 +34,34 @@ import android.graphics.Point; import android.graphics.Rect; import android.graphics.drawable.ColorDrawable; import android.graphics.drawable.Drawable; +import android.os.Build; +import android.os.Bundle; import android.os.Parcelable; +import android.support.v4.view.ViewCompat; +import android.support.v4.view.accessibility.AccessibilityNodeInfoCompat; +import android.support.v4.widget.ExploreByTouchHelper; import android.util.AttributeSet; import android.util.Log; import android.util.SparseArray; import android.view.MotionEvent; import android.view.View; +import android.view.View.OnClickListener; import android.view.ViewDebug; import android.view.ViewGroup; +import android.view.accessibility.AccessibilityEvent; import android.view.animation.Animation; import android.view.animation.DecelerateInterpolator; import android.view.animation.LayoutAnimationController; import com.android.launcher3.FolderIcon.FolderRingAnimator; +import com.android.launcher3.LauncherAccessibilityDelegate.DragType; import java.util.ArrayList; import java.util.Arrays; import java.util.Collections; import java.util.Comparator; import java.util.HashMap; +import java.util.List; import java.util.Stack; public class CellLayout extends ViewGroup { @@ -169,6 +179,14 @@ public class CellLayout extends ViewGroup { private final static Paint sPaint = new Paint(); + // Related to accessible drag and drop + DragAndDropAccessibilityDelegate mTouchHelper = new DragAndDropAccessibilityDelegate(this); + private boolean mUseTouchHelper = false; + OnClickListener mOldClickListener = null; + OnClickListener mOldWorkspaceListener = null; + private int mDownX = 0; + private int mDownY = 0; + public CellLayout(Context context) { this(context, null); } @@ -294,6 +312,282 @@ public class CellLayout extends ViewGroup { addView(mShortcutsAndWidgets); } + @TargetApi(Build.VERSION_CODES.LOLLIPOP) + public void enableAccessibleDrag(boolean enable) { + mUseTouchHelper = enable; + if (!enable) { + ViewCompat.setAccessibilityDelegate(this, null); + setImportantForAccessibility(IMPORTANT_FOR_ACCESSIBILITY_NO); + getShortcutsAndWidgets().setImportantForAccessibility(IMPORTANT_FOR_ACCESSIBILITY_NO); + setOnClickListener(mLauncher); + } else { + ViewCompat.setAccessibilityDelegate(this, mTouchHelper); + setImportantForAccessibility(IMPORTANT_FOR_ACCESSIBILITY_YES); + getShortcutsAndWidgets().setImportantForAccessibility(IMPORTANT_FOR_ACCESSIBILITY_YES); + setOnClickListener(mTouchHelper); + } + + // Invalidate the accessibility hierarchy + if (getParent() != null) { + getParent().notifySubtreeAccessibilityStateChanged( + this, this, AccessibilityEvent.CONTENT_CHANGE_TYPE_SUBTREE); + } + } + + @Override + public boolean dispatchHoverEvent(MotionEvent event) { + // Always attempt to dispatch hover events to accessibility first. + if (mUseTouchHelper && mTouchHelper.dispatchHoverEvent(event)) { + return true; + } + return super.dispatchHoverEvent(event); + } + + @Override + public boolean dispatchTouchEvent(MotionEvent event) { + if (event.getAction() == MotionEvent.ACTION_DOWN) { + mDownX = (int) event.getX(); + mDownY = (int) event.getY(); + } + return super.dispatchTouchEvent(event); + } + + @Override + public boolean onInterceptTouchEvent(MotionEvent ev) { + if (mUseTouchHelper || + (mInterceptTouchListener != null && mInterceptTouchListener.onTouch(this, ev))) { + return true; + } + return false; + } + + class DragAndDropAccessibilityDelegate extends ExploreByTouchHelper implements OnClickListener { + private final Rect mTempRect = new Rect(); + + public DragAndDropAccessibilityDelegate(View forView) { + super(forView); + } + + private int getViewIdAt(float x, float y) { + if (x < 0 || y < 0 || x > getMeasuredWidth() || y > getMeasuredHeight()) { + return ExploreByTouchHelper.INVALID_ID; + } + + // Map coords to cell + int cellX = (int) Math.floor(x / (mCellWidth + mWidthGap)); + int cellY = (int) Math.floor(y / (mCellHeight + mHeightGap)); + + // Map cell to id + int id = cellX * mCountY + cellY; + return id; + } + + @Override + protected int getVirtualViewAt(float x, float y) { + return nearestDropLocation(getViewIdAt(x, y)); + } + + protected int nearestDropLocation(int id) { + int count = mCountX * mCountY; + for (int delta = 0; delta < count; delta++) { + if (id + delta <= (count - 1)) { + int target = intersectsValidDropTarget(id + delta); + if (target >= 0) { + return target; + } + } else if (id - delta >= 0) { + int target = intersectsValidDropTarget(id - delta); + if (target >= 0) { + return target; + } + } + } + return ExploreByTouchHelper.INVALID_ID; + } + + /** + * Find the virtual view id corresponding to the top left corner of any drop region by which + * the passed id is contained. For an icon, this is simply + * + * @param id the id we're interested examining (ie. does it fit there?) + * @return the view id of the top left corner of a valid drop region or -1 if there is no + * such valid region. For the icon, this can just be -1 or id. + */ + protected int intersectsValidDropTarget(int id) { + LauncherAccessibilityDelegate delegate = + LauncherAppState.getInstance().getAccessibilityDelegate(); + LauncherAccessibilityDelegate.DragInfo dragInfo = delegate.getDragInfo(); + + int y = id % mCountY; + int x = id / mCountY; + + if (dragInfo.dragType == DragType.WIDGET) { + // For a widget, every cell must be vacant. In addition, we will return any valid + // drop target by which the passed id is contained. + boolean fits = false; + + // These represent the amount that we can back off if we hit a problem. They + // get consumed as we move up and to the right, trying new regions. + int spanX = dragInfo.info.spanX; + int spanY = dragInfo.info.spanY; + + for (int m = 0; m < spanX; m++) { + for (int n = 0; n < spanY; n++) { + + fits = true; + int x0 = x - m; + int y0 = y - n; + + if (x0 < 0 || y0 < 0) continue; + + for (int i = x0; i < x0 + spanX; i++) { + if (!fits) break; + for (int j = y0; j < y0 + spanY; j++) { + if (i >= mCountX || j >= mCountY || mOccupied[i][j]) { + fits = false; + break; + } + } + } + if (fits) { + return x0 * mCountY + y0; + } + } + } + return -1; + } else { + // For an icon, we simply check the view directly below + View child = getChildAt(x, y); + if (child == null || child == dragInfo.item) { + // Empty cell. Good for an icon or folder. + return id; + } else if (dragInfo.dragType != DragType.FOLDER) { + // For icons, we can consider cells that have another icon or a folder. + ItemInfo info = (ItemInfo) child.getTag(); + if (info instanceof AppInfo || info instanceof FolderInfo || + info instanceof ShortcutInfo) { + return id; + } + } + return -1; + } + } + + @Override + protected void getVisibleVirtualViews(List<Integer> virtualViews) { + // We create a virtual view for each cell of the grid + // The cell ids correspond to cells in reading order. + int nCells = mCountX * mCountY; + + for (int i = 0; i < nCells; i++) { + if (intersectsValidDropTarget(i) >= 0) { + virtualViews.add(i); + } + } + } + + @Override + protected boolean onPerformActionForVirtualView(int viewId, int action, Bundle args) { + if (action == AccessibilityNodeInfoCompat.ACTION_CLICK) { + String confirmation = getConfirmationForIconDrop(viewId); + LauncherAppState.getInstance().getAccessibilityDelegate() + .handleAccessibleDrop(CellLayout.this, getItemBounds(viewId), confirmation); + return true; + } + return false; + } + + @Override + public void onClick(View arg0) { + int viewId = getViewIdAt(mDownX, mDownY); + + String confirmation = getConfirmationForIconDrop(viewId); + LauncherAppState.getInstance().getAccessibilityDelegate() + .handleAccessibleDrop(CellLayout.this, getItemBounds(viewId), confirmation); + } + + @Override + protected void onPopulateEventForVirtualView(int id, AccessibilityEvent event) { + if (id == ExploreByTouchHelper.INVALID_ID) { + throw new IllegalArgumentException("Invalid virtual view id"); + } + // We're required to set something here. + event.setContentDescription(""); + } + + @Override + protected void onPopulateNodeForVirtualView(int id, AccessibilityNodeInfoCompat node) { + if (id == ExploreByTouchHelper.INVALID_ID) { + throw new IllegalArgumentException("Invalid virtual view id"); + } + + node.setContentDescription(getLocationDescriptionForIconDrop(id)); + node.setBoundsInParent(getItemBounds(id)); + + node.addAction(AccessibilityNodeInfoCompat.ACTION_CLICK); + node.setClickable(true); + node.setFocusable(true); + } + + private String getLocationDescriptionForIconDrop(int id) { + LauncherAccessibilityDelegate delegate = + LauncherAppState.getInstance().getAccessibilityDelegate(); + LauncherAccessibilityDelegate.DragInfo dragInfo = delegate.getDragInfo(); + + int y = id % mCountY; + int x = id / mCountY; + + Resources res = getContext().getResources(); + View child = getChildAt(x, y); + if (child == null || child == dragInfo.item) { + return res.getString(R.string.move_to_empty_cell, x, y); + } else { + ItemInfo info = (ItemInfo) child.getTag(); + if (info instanceof AppInfo || info instanceof ShortcutInfo) { + return res.getString(R.string.create_folder_with, info.title); + } else if (info instanceof FolderInfo) { + return res.getString(R.string.add_to_folder, info.title); + } + } + return ""; + } + + private String getConfirmationForIconDrop(int id) { + LauncherAccessibilityDelegate delegate = + LauncherAppState.getInstance().getAccessibilityDelegate(); + LauncherAccessibilityDelegate.DragInfo dragInfo = delegate.getDragInfo(); + + int y = id % mCountY; + int x = id / mCountY; + + Resources res = getContext().getResources(); + View child = getChildAt(x, y); + if (child == null || child == dragInfo.item) { + return res.getString(R.string.item_moved); + } else { + ItemInfo info = (ItemInfo) child.getTag(); + if (info instanceof AppInfo || info instanceof ShortcutInfo) { + return res.getString(R.string.folder_created); + + } else if (info instanceof FolderInfo) { + return res.getString(R.string.added_to_folder); + } + } + return ""; + } + + private Rect getItemBounds(int id) { + int cellY = id % mCountY; + int cellX = id / mCountY; + int x = getPaddingLeft() + (int) (cellX * (mCellWidth + mWidthGap)); + int y = getPaddingTop() + (int) (cellY * (mCellHeight + mHeightGap)); + + Rect bounds = mTempRect; + bounds.set(x, y, x + mCellWidth, y + mCellHeight); + return bounds; + } + } + public void enableHardwareLayer(boolean hasLayer) { mShortcutsAndWidgets.setLayerType(hasLayer ? LAYER_TYPE_HARDWARE : LAYER_TYPE_NONE, sPaint); } @@ -679,18 +973,6 @@ public class CellLayout extends ViewGroup { mShortcutsAndWidgets.removeViewsInLayout(start, count); } - @Override - public boolean onInterceptTouchEvent(MotionEvent ev) { - // First we clear the tag to ensure that on every touch down we start with a fresh slate, - // even in the case where we return early. Not clearing here was causing bugs whereby on - // long-press we'd end up picking up an item from a previous drag operation. - if (mInterceptTouchListener != null && mInterceptTouchListener.onTouch(this, ev)) { - return true; - } - - return false; - } - /** * Given a point, return the cell that strictly encloses that point * @param x X coordinate of the point |