You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
111 lines
3.6 KiB
Markdown
111 lines
3.6 KiB
Markdown
# Module CVAT-CANVAS
|
|
|
|
## Description
|
|
The CVAT module presents a canvas to viewing, drawing and editing of annotations.
|
|
|
|
- It has been written on typescript
|
|
- It contains the class ```Canvas``` and the enum ```Rotation```
|
|
|
|
## Commands
|
|
- Building of the module from sources in the ```dist``` directory:
|
|
|
|
```bash
|
|
npm run build
|
|
npm run build -- --mode=development # without a minification
|
|
```
|
|
|
|
- Updating of a module version:
|
|
```bash
|
|
npm version patch # updated after minor fixes
|
|
npm version minor # updated after major changes which don't affect API compatibility with previous versions
|
|
npm version major # updated after major changes which affect API compatibility with previous versions
|
|
```
|
|
|
|
## Creation
|
|
Canvas is created by using constructor:
|
|
|
|
```js
|
|
const { Canvas } = require('./canvas');
|
|
const canvas = new Canvas();
|
|
```
|
|
|
|
- Canvas has transparent background
|
|
|
|
Canvas itself handles:
|
|
- Shape context menu (PKM)
|
|
- Image moving (mousedrag)
|
|
- Image resizing (mousewheel)
|
|
- Image fit (dblclick)
|
|
- Remove point (PKM)
|
|
- Polyshape editing (Shift + LKM)
|
|
|
|
## API
|
|
### Methods
|
|
|
|
All methods are sync.
|
|
|
|
```ts
|
|
html(): HTMLDivElement;
|
|
setup(frameData: FrameData, objectStates: ObjectState): void;
|
|
activate(clientID: number, attributeID?: number): void;
|
|
rotate(rotation: Rotation, remember?: boolean): void;
|
|
focus(clientID: number, padding?: number): void;
|
|
fit(): void;
|
|
grid(stepX: number, stepY: number): void;
|
|
|
|
draw(enabled?: boolean, shapeType?: string, numberOfPoints?: number, initialState?: any): void | ObjectState;
|
|
split(enabled?: boolean): void | ObjectState;
|
|
group(enabled?: boolean): void | ObjectState;
|
|
merge(enabled?: boolean): void | ObjectState;
|
|
|
|
cancel(): any;
|
|
```
|
|
|
|
### CSS Classes/IDs
|
|
|
|
- Each drawn object (tag, shape, track) has id ```cvat_canvas_object_{objectState.id}```
|
|
- Drawn shapes and tracks have classes ```cvat_canvas_shape```,
|
|
```cvat_canvas_shape_activated```,
|
|
```cvat_canvas_shape_grouping```,
|
|
```cvat_canvas_shape_merging```,
|
|
```cvat_canvas_shape_drawing```
|
|
- Tags has a class ```cvat_canvas_tag```
|
|
- Canvas image has ID ```cvat_canvas_image```
|
|
- Grid on the canvas has ID ```cvat_canvas_grid_pattern```
|
|
|
|
### Events
|
|
|
|
Standard JS events are used.
|
|
```js
|
|
- canvas.setup
|
|
- canvas.activated => ObjectState
|
|
- canvas.deactivated
|
|
- canvas.moved => [ObjectState], x, y
|
|
- canvas.drawn => ObjectState
|
|
- canvas.edited => ObjectState
|
|
- canvas.splitted => ObjectState
|
|
- canvas.groupped => [ObjectState]
|
|
- canvas.merged => [ObjectState]
|
|
```
|
|
|
|
## States
|
|
|
|
|
|
|
|
## API Reaction
|
|
|
|
| | FREE | GROUPING | SPLITTING | DRAWING | MERGING | EDITING |
|
|
|------------|------|----------|-----------|---------|---------|---------|
|
|
| html() | + | + | + | + | + | + |
|
|
| setup() | + | + | + | + | + | - |
|
|
| activate() | + | - | - | - | - | - |
|
|
| rotate() | + | + | + | + | + | + |
|
|
| focus() | + | + | + | + | + | + |
|
|
| fit() | + | + | + | + | + | + |
|
|
| grid() | + | + | + | + | + | + |
|
|
| draw() | + | - | - | - | - | - |
|
|
| split() | + | - | + | - | - | - |
|
|
| group | + | + | - | - | - | - |
|
|
| merge() | + | - | - | - | + | - |
|
|
| cancel() | - | + | + | + | + | + |
|