TestListViewSceneBase.cpp revision 06152cdd06da50762716cd455dcf7ab0117f25b0 
1/*
2 * Copyright (C) 2016 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#include "TestListViewSceneBase.h"
18
19#include "TestContext.h"
20#include "TestUtils.h"
21
22#include <utils/Color.h>
23
24namespace android {
25namespace uirenderer {
26namespace test {
27
28void TestListViewSceneBase::createContent(int width, int height, Canvas& canvas) {
29    srand(0);
30    mItemHeight = dp(60);
31    mItemSpacing = dp(16);
32    mItemWidth = std::min((height - mItemSpacing * 2), (int)dp(300));
33    mItemLeft = (width - mItemWidth) / 2;
34    int heightWithSpacing = mItemHeight + mItemSpacing;
35    for (int y = 0; y < height + (heightWithSpacing - 1); y += heightWithSpacing) {
36        int id = mListItems.size();
37        auto setup = std::bind(&TestListViewSceneBase::createListItem, this, std::placeholders::_1,
38                std::placeholders::_2, id, mItemWidth, mItemHeight);
39        auto node = TestUtils::createNode(mItemLeft, y, mItemLeft + mItemWidth,
40                y + mItemHeight, setup);
41        mListItems.push_back(node);
42    }
43    mListView = TestUtils::createNode(0, 0, width, height,
44            [this](RenderProperties& props, Canvas& canvas) {
45        for (size_t ci = 0; ci < mListItems.size(); ci++) {
46            canvas.drawRenderNode(mListItems[ci].get());
47        }
48    });
49
50    canvas.drawColor(Color::Grey_500, SkXfermode::kSrcOver_Mode);
51    canvas.drawRenderNode(mListView.get());
52}
53
54void TestListViewSceneBase::doFrame(int frameNr) {
55    int scrollPx = dp(frameNr) * 3;
56    int itemIndexOffset = scrollPx / (mItemSpacing + mItemHeight);
57    int pxOffset = -(scrollPx % (mItemSpacing + mItemHeight));
58
59    std::unique_ptr<Canvas> canvas(Canvas::create_recording_canvas(mListView->stagingProperties().getWidth(),
60            mListView->stagingProperties().getHeight()));
61    for (size_t ci = 0; ci < mListItems.size(); ci++) {
62        // update item position
63        auto listItem = mListItems[(ci + itemIndexOffset) % mListItems.size()];
64        int top = ((int)ci) * (mItemSpacing + mItemHeight) + pxOffset;
65        listItem->mutateStagingProperties().setLeftTopRightBottom(
66                mItemLeft, top, mItemLeft + mItemWidth, top + mItemHeight);
67        listItem->setPropertyFieldsDirty(RenderNode::X | RenderNode::Y);
68
69        // draw it to parent DisplayList
70        canvas->drawRenderNode(mListItems[ci].get());
71    }
72    mListView->setStagingDisplayList(canvas->finishRecording(), nullptr);
73}
74
75} // namespace test
76} // namespace uirenderer
77} // namespace android
78