1 files changed, 151 insertions, 0 deletions
diff --git a/src/com/android/launcher3/views/Snackbar.java b/src/com/android/launcher3/views/Snackbar.java
new file mode 100644
index 000000000..f515360e6
--- /dev/null
+++ b/src/com/android/launcher3/views/Snackbar.java
@@ -0,0 +1,151 @@
+/*
+ * Copyright (C) 2018 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.views;
+
+import android.content.Context;
+import android.content.res.Resources;
+import android.graphics.Rect;
+import android.util.AttributeSet;
+import android.view.Gravity;
+import android.view.MotionEvent;
+import android.widget.TextView;
+
+import com.android.launcher3.AbstractFloatingView;
+import com.android.launcher3.Launcher;
+import com.android.launcher3.R;
+import com.android.launcher3.anim.Interpolators;
+import com.android.launcher3.dragndrop.DragLayer;
+
+/**
+ * A toast-like UI at the bottom of the screen with a label, button action, and dismiss action.
+ */
+public class Snackbar extends AbstractFloatingView {
+
+    private static final long SHOW_DURATION_MS = 180;
+    private static final long HIDE_DURATION_MS = 180;
+    private static final long TIMEOUT_DURATION_MS = 4000;
+
+    private final Launcher mLauncher;
+    private Runnable mOnDismissed;
+
+    public Snackbar(Context context, AttributeSet attrs) {
+        this(context, attrs, 0);
+    }
+
+    public Snackbar(Context context, AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+        mLauncher = Launcher.getLauncher(context);
+        inflate(context, R.layout.snackbar, this);
+    }
+
+    public static void show(Launcher launcher, int labelStringResId, int actionStringResId,
+            Runnable onDismissed, Runnable onActionClicked) {
+        closeOpenViews(launcher, true, TYPE_SNACKBAR);
+        Snackbar snackbar = new Snackbar(launcher, null);
+        // Set some properties here since inflated xml only contains the children.
+        snackbar.setOrientation(HORIZONTAL);
+        snackbar.setGravity(Gravity.CENTER_VERTICAL);
+        Resources res = launcher.getResources();
+        snackbar.setElevation(res.getDimension(R.dimen.deep_shortcuts_elevation));
+        int padding = res.getDimensionPixelSize(R.dimen.snackbar_padding);
+        snackbar.setPadding(padding, padding, padding, padding);
+        snackbar.setBackgroundResource(R.drawable.round_rect_primary);
+
+        snackbar.mIsOpen = true;
+        DragLayer dragLayer = launcher.getDragLayer();
+        dragLayer.addView(snackbar);
+
+        DragLayer.LayoutParams params = (DragLayer.LayoutParams) snackbar.getLayoutParams();
+        params.gravity = Gravity.CENTER_HORIZONTAL | Gravity.BOTTOM;
+        params.height = res.getDimensionPixelSize(R.dimen.snackbar_height);
+        int margin = res.getDimensionPixelSize(R.dimen.snackbar_margin);
+        Rect insets = launcher.getDeviceProfile().getInsets();
+        params.width = dragLayer.getWidth() - margin * 2 -  insets.left - insets.right;
+        params.setMargins(0, margin + insets.top, 0, margin + insets.bottom);
+
+        ((TextView) snackbar.findViewById(R.id.label)).setText(labelStringResId);
+        ((TextView) snackbar.findViewById(R.id.action)).setText(actionStringResId);
+        snackbar.findViewById(R.id.action).setOnClickListener(v -> {
+            if (onActionClicked != null) {
+                onActionClicked.run();
+            }
+            snackbar.mOnDismissed = null;
+            snackbar.close(true);
+        });
+        snackbar.mOnDismissed = onDismissed;
+
+        snackbar.setAlpha(0);
+        snackbar.setScaleX(0.8f);
+        snackbar.setScaleY(0.8f);
+        snackbar.animate()
+                .alpha(1f)
+                .withLayer()
+                .scaleX(1)
+                .scaleY(1)
+                .setDuration(SHOW_DURATION_MS)
+                .setInterpolator(Interpolators.ACCEL_DEACCEL)
+                .start();
+        snackbar.postDelayed(() -> snackbar.close(true), TIMEOUT_DURATION_MS);
+    }
+
+    @Override
+    protected void handleClose(boolean animate) {
+        if (mIsOpen) {
+            if (animate) {
+                animate().alpha(0f)
+                        .withLayer()
+                        .setStartDelay(0)
+                        .setDuration(HIDE_DURATION_MS)
+                        .setInterpolator(Interpolators.ACCEL)
+                        .withEndAction(this::onClosed)
+                        .start();
+            } else {
+                animate().cancel();
+                onClosed();
+            }
+            mIsOpen = false;
+        }
+    }
+
+    private void onClosed() {
+        mLauncher.getDragLayer().removeView(this);
+        if (mOnDismissed != null) {
+            mOnDismissed.run();
+        }
+    }
+
+    @Override
+    public void logActionCommand(int command) {
+        // TODO
+    }
+
+    @Override
+    protected boolean isOfType(int type) {
+        return (type & TYPE_SNACKBAR) != 0;
+    }
+
+    @Override
+    public boolean onControllerInterceptTouchEvent(MotionEvent ev) {
+        if (ev.getAction() == MotionEvent.ACTION_DOWN) {
+            DragLayer dl = mLauncher.getDragLayer();
+            if (!dl.isEventOverView(this, ev)) {
+                close(true);
+            }
+        }
+        return false;
+    }
+}