Deepanjan Roy | 9d95a25 | 2018-08-09 10:10:19 -0400 | [diff] [blame] | 1 | // Copyright (C) 2018 The Android Open Source Project |
| 2 | // |
| 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 | |
Deepanjan Roy | 1f658fe | 2018-09-11 08:38:17 -0400 | [diff] [blame] | 15 | import * as m from 'mithril'; |
Deepanjan Roy | abd79aa | 2018-08-28 07:29:15 -0400 | [diff] [blame] | 16 | |
Deepanjan Roy | 1f658fe | 2018-09-11 08:38:17 -0400 | [diff] [blame] | 17 | export interface PanelSize { |
| 18 | width: number; |
| 19 | height: number; |
| 20 | } |
Deepanjan Roy | abd79aa | 2018-08-28 07:29:15 -0400 | [diff] [blame] | 21 | |
Deepanjan Roy | 1f658fe | 2018-09-11 08:38:17 -0400 | [diff] [blame] | 22 | export abstract class Panel<Attrs = {}> implements m.ClassComponent<Attrs> { |
| 23 | abstract renderCanvas( |
| 24 | ctx: CanvasRenderingContext2D, size: PanelSize, |
| 25 | vnode: PanelVNode<Attrs>): void; |
| 26 | abstract view(vnode: m.CVnode<Attrs>): m.Children|null|void; |
| 27 | } |
Deepanjan Roy | abd79aa | 2018-08-28 07:29:15 -0400 | [diff] [blame] | 28 | |
Deepanjan Roy | abd79aa | 2018-08-28 07:29:15 -0400 | [diff] [blame] | 29 | |
Deepanjan Roy | 1f658fe | 2018-09-11 08:38:17 -0400 | [diff] [blame] | 30 | export type PanelVNode<Attrs = {}> = m.Vnode<Attrs, Panel<Attrs>>; |
| 31 | |
| 32 | export function isPanelVNode(vnode: m.Vnode): vnode is PanelVNode { |
| 33 | const tag = vnode.tag as {}; |
| 34 | return ( |
| 35 | typeof tag === 'function' && 'prototype' in tag && |
| 36 | tag.prototype instanceof Panel); |
Deepanjan Roy | 9d95a25 | 2018-08-09 10:10:19 -0400 | [diff] [blame] | 37 | } |