1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
|
import React, { Component } from 'react'
import { Link } from 'react-router-dom'
import { bindActionCreators } from 'redux'
import { connect } from 'react-redux'
import toBlob from 'data-uri-to-blob'
import { clamp } from '../../../util'
import { Loader } from '../../../common'
const defaultState = {
dragging: false,
draggingBox: false,
bounds: null,
mouseX: 0,
mouseY: 0,
box: {
x: 0,
y: 0,
w: 0,
h: 0,
}
}
export default class ImageSelection extends Component {
state = {
...defaultState
}
constructor() {
super()
// bind these events in the constructor, so we can remove event listeners later
this.handleMouseDown = this.handleMouseDown.bind(this)
this.handleMouseDownOnBox = this.handleMouseDownOnBox.bind(this)
this.handleMouseMove = this.handleMouseMove.bind(this)
this.handleMouseUp = this.handleMouseUp.bind(this)
this.handleWindowResize = this.handleWindowResize.bind(this)
}
componentDidMount() {
document.body.addEventListener('mousemove', this.handleMouseMove)
document.body.addEventListener('mouseup', this.handleMouseUp)
window.addEventListener('resize', this.handleWindowResize)
}
componentDidUpdate(prevProps) {
if (this.state.bounds && this.props.url !== prevProps.url) {
this.setState({
...defaultState,
bounds: this.getBoundingClientRect(),
box: this.props.crop || defaultState.box,
})
}
}
componentWillUnmount() {
document.body.removeEventListener('mousemove', this.handleMouseMove)
document.body.removeEventListener('mouseup', this.handleMouseUp)
window.removeEventListener('resize', this.handleWindowResize)
}
getBoundingClientRect() {
if (!this.imgRef) return null
const rect = this.imgRef.getBoundingClientRect()
const scrollTop = document.body.scrollTop || document.body.parentNode.scrollTop
const scrollLeft = document.body.scrollLeft || document.body.parentNode.scrollLeft
const bounds = {
top: rect.top + scrollTop,
left: rect.left + scrollLeft,
width: rect.width,
height: rect.height,
}
return bounds
}
handleLoad() {
const bounds = this.getBoundingClientRect()
const box = this.props.crop || defaultState.box
this.setState({ bounds, box })
}
handleWindowResize() {
if (!this.imgRef) return
const bounds = this.getBoundingClientRect()
this.setState({ bounds })
}
handleMouseDown(e) {
e.preventDefault()
const bounds = this.getBoundingClientRect()
const mouseX = e.pageX
const mouseY = e.pageY
const x = (mouseX - bounds.left) / bounds.width
const y = (mouseY - bounds.top) / bounds.height
const w = 1 / bounds.width
const h = 1 / bounds.height
this.setState({
dragging: true,
bounds,
mouseX,
mouseY,
box: {
x, y, w, h,
}
})
}
handleMouseDownOnBox(e) {
const bounds = this.getBoundingClientRect()
const mouseX = e.pageX
const mouseY = e.pageY
this.setState({
draggingBox: true,
bounds,
mouseX,
mouseY,
initialBox: {
...this.state.box
},
box: {
...this.state.box
}
})
}
handleMouseMove(e) {
const {
dragging, draggingBox,
bounds, mouseX, mouseY, initialBox, box
} = this.state
if (dragging) {
e.preventDefault()
let { x, y } = box
let dx = (e.pageX - mouseX) / bounds.width
let dy = (e.pageY - mouseY) / bounds.height
let w = clamp(dx, 0.0, 1.0 - x)
let h = clamp(dy, 0.0, 1.0 - y)
this.setState({
box: {
x, y, w, h,
}
})
} else if (draggingBox) {
e.preventDefault()
let { x, y, w, h } = initialBox
let dx = (e.pageX - mouseX) / bounds.width
let dy = (e.pageY - mouseY) / bounds.height
this.setState({
box: {
x: clamp(x + dx, 0, 1.0 - w),
y: clamp(y + dy, 0, 1.0 - h),
w,
h,
}
})
}
}
handleMouseUp(e) {
const { onCrop } = this.props
const { dragging, draggingBox, bounds, box } = this.state
if (!dragging && !draggingBox) return
e.preventDefault()
const { x, y, w, h } = box
let url = window.location.pathname
this.setState({
dragging: false,
draggingBox: false,
})
if (w < 10 / bounds.width || h < 10 / bounds.height) {
this.setState({ box: { ...defaultState.box }})
onCrop({})
} else {
// pass the box dimensions up - do the search again
onCrop(box)
}
}
render() {
const { url } = this.props
const { bounds, box } = this.state
const { x, y, w, h } = box
return (
<div className="imageSelection">
<img
src={url}
ref={ref => this.imgRef = ref}
onMouseDown={this.handleMouseDown}
onLoad={this.handleLoad.bind(this)}
crossOrigin='anonymous'
/>
{!!w &&
<div
className="box"
style={{
left: x * bounds.width,
top: y * bounds.height,
width: w * bounds.width,
height: h * bounds.height,
}}
onMouseDown={this.handleMouseDownOnBox}
/>
}
</div>
)
}
}
const boxToFixed = ({ x, y, w, h }) => ({
x: x.toFixed(3),
y: y.toFixed(3),
w: w.toFixed(3),
h: h.toFixed(3),
})
|
