• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
1/*
2 * Copyright (c) 2022 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 *     http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15import router from '@ohos.router';
16
17@Entry
18@Component
19struct TransformExample {
20  private settings: RenderingContextSettings = new RenderingContextSettings(true)
21  private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
22  private Scroller = new Scroller()
23
24  build() {
25    Column() {
26      Canvas(this.context)
27        .width('100%')
28        .height('50%')
29        .backgroundColor('#00ffff')
30        .padding({left: 12, right: 12})
31      Row() {
32        Button('translate')
33          .width(130).height(45)
34          .key('translate')
35          .onClick(() => {
36            this.context.fillRect(90, 90, 100, 100);
37            this.context.translate(90, 90)
38            this.context.fillRect(90, 90, 100, 100);
39          })
40        Button('transform')
41          .width(130).height(45)
42          .key('transform')
43          .onClick(() => {
44            this.context.fillStyle = 'rgb(0,0,0)';
45            this.context.fillRect(0, 0, 100, 100);
46            this.context.transform(1, 0.5, -0.5, 1, 10, 10);
47            this.context.fillStyle = 'rgb(255,0,0)';
48            this.context.fillRect(0, 0, 100, 100);
49            this.context.transform(1, 0.5, -0.5, 1, 10, 10);
50            this.context.fillStyle = 'rgb(0,0,255)';
51            this.context.fillRect(0, 0, 100, 100);
52          })
53        Button('setTransform')
54          .width(130).height(45)
55          .key('setTransform')
56          .onClick(() => {
57            this.context.fillStyle = 'rgb(0,0,255)';
58            this.context.fillRect(20, 20, 100, 100);
59            this.context.setTransform(1, 0.5, -0.5, 1, 10, 10);
60          })
61      }.margin({ top: 10 })
62      .width('100%')
63      .justifyContent(FlexAlign.SpaceAround)
64
65      Row() {
66        Button('rotate').width(130).height(45)
67          .key('rotate')
68          .onClick(() => {
69            this.context.rotate(45 * Math.PI / 180);
70            this.context.fillRect(300, 100, 100, 100);
71          })
72        Button('back')
73          .width(130).height(45).backgroundColor(Color.Orange)
74          .key('back')
75          .onClick(() => {
76            router.back()
77          })
78      }.margin({ top: 10 })
79      .width('100%')
80      .justifyContent(FlexAlign.SpaceAround)
81    }
82    .alignItems(HorizontalAlign.Center)
83    .justifyContent(FlexAlign.Center)
84  }
85}