1 /*
2 * Copyright (C) 2024 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 package com.android.launcher3.util.rects
18
19 import android.graphics.Rect
20 import android.view.View
21 import com.android.launcher3.Utilities
22
23 /**
24 * Linearly interpolate between two rectangles. The result is stored in the rect the function is
25 * called on.
26 *
27 * @param start the starting rectangle
28 * @param end the ending rectangle
29 * @param t the interpolation factor, where 0 is the start and 1 is the end
30 */
Rectnull31 fun Rect.lerpRect(start: Rect, end: Rect, t: Float) {
32 set(
33 Utilities.mapRange(t, start.left.toFloat(), end.left.toFloat()).toInt(),
34 Utilities.mapRange(t, start.top.toFloat(), end.top.toFloat()).toInt(),
35 Utilities.mapRange(t, start.right.toFloat(), end.right.toFloat()).toInt(),
36 Utilities.mapRange(t, start.bottom.toFloat(), end.bottom.toFloat()).toInt(),
37 )
38 }
39
40 /** Copy the coordinates of the [view] relative to its parent into this rectangle. */
Rectnull41 fun Rect.set(view: View) {
42 set(0, 0, view.width, view.height)
43 offset(view.x.toInt(), view.y.toInt())
44 }
45