-
Notifications
You must be signed in to change notification settings - Fork 2
/
cs_widget.js
237 lines (223 loc) · 8.47 KB
/
cs_widget.js
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
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
var widgets = require('@jupyter-widgets/base');
var _ = require('lodash');
var cs = require('cornerstone-core');
var cm = require('cornerstone-math');
var ctools = require('cornerstone-tools');
var $ = require('jquery');
ctools.external.cornerstone = cs;
ctools.external.cornerstoneMath = cm;
// When serialiazing the entire widget state for embedding, only values that
// differ from the defaults will be specified.
var CornerstoneModel = widgets.DOMWidgetModel.extend({
defaults: _.extend(widgets.DOMWidgetModel.prototype.defaults(), {
_model_name: 'CornerstoneModel',
_view_name: 'CornerstoneView',
_model_module: 'cornerstone_widget',
_view_module: 'cornerstone_widget',
_model_module_version: '0.1.0',
_view_module_version: '0.1.0',
img_bytes: '',
img_scale: 1,
img_width: 0,
img_height: 0,
img_min: 0,
img_max: 1,
img_color: false,
_selected_tool: '',
_tool_state_in: '',
_tool_state_out: ''
})
});
function str2ab(str) {
var buf = new ArrayBuffer(str.length * 2); // 2 bytes for each char
var bufView = new Uint16Array(buf);
var index = 0;
for (var i = 0, strLen = str.length; i < strLen; i += 2) {
var lower = str.charCodeAt(i);
var upper = str.charCodeAt(i + 1);
bufView[index] = lower + (upper << 8);
index++;
}
return bufView;
}
function str2rgb(str) {
var buf = new ArrayBuffer(str.length); // 1 bytes for each char
var bufView = new Uint8Array(buf);
var index = 0;
for (var i = 0, strLen = str.length; i < strLen; i += 2) {
var lower = str.charCodeAt(i);
bufView[index] = lower;
index++;
}
return bufView;
}
function disableContextMenu(e) {
$(e).on('contextmenu', function (e) {
e.preventDefault();
});
}
var CornerstoneView = widgets.DOMWidgetView.extend({
initialize: function () {
this.viewer = document.createElement('div');
var fv = $(this.viewer);
disableContextMenu(this.viewer);
fv.width('512px');
fv.height('512px');
},
render: function () {
this.el.appendChild(this.viewer);
this.dicom_changed();
this.model.on('change:img_bytes', this.dicom_changed, this);
this.model.on('change:img_scale', this.zoom_changed, this);
this.model.on('change:_tool_state_in', this.update_cs_state, this);
this.model.on('change:_selected_tool', this.activate_tool, this);
var my_viewer = this.viewer;
var my_model = this.model;
// save the cornerstone state on mouseup to catch both clicks and drags
this.viewer.addEventListener('mouseup',
function (e) {
var appState = ctools.appState.save([my_viewer]);
var appStr = JSON.stringify(appState);
console.log('State is:' + appStr);
my_model.set('_tool_state_out', appStr);
my_model.save_changes();
});
},
parse_image: function (imageB64Data, width, height, min_val, max_val, color) {
var pixelDataAsString = window.atob(imageB64Data, width, height);
if (color) {
var pixelData = str2rgb(pixelDataAsString);
} else {
var pixelData = str2ab(pixelDataAsString);
}
console.log('decoding: ' + width + 'x' + height + ' => ' + pixelData.length)
function getPixelData() {
return pixelData;
}
var maxPixelValue = 65535;
var sizeInBytes = height * width * 2;
var slope = (max_val - min_val) / 65535.0;
var intercept = min_val;
if (color) {
maxPixelValue = 255;
sizeInBytes = height * width * 4;
slope = 1;
intercept = 0;
}
var out_arr = {
imageId: '',
minPixelValue: 0,
maxPixelValue: maxPixelValue,
slope: slope,
intercept: intercept,
getPixelData: getPixelData,
windowCenter: 0.5 * (max_val + min_val),
windowWidth: (max_val - min_val),
rows: height,
columns: width,
height: height,
width: width,
color: color,
columnPixelSpacing: 1.0,
rowPixelSpacing: 1.0,
sizeInBytes: sizeInBytes
};
return out_arr;
},
dicom_changed: function () {
var img_bytes = this.model.get('img_bytes');
console.log('image bytes', img_bytes)
var img_width = this.model.get('img_width');
var img_height = this.model.get('img_height');
var img_min = this.model.get('img_min');
var img_max = this.model.get('img_max');
var color = this.model.get('img_color')
var out_img = this.parse_image(img_bytes, img_width, img_height, img_min, img_max, color);
cs.enable(this.viewer);
this.viewport = cs.getDefaultViewportForImage(this.viewer, out_img);
console.log(out_img);
cs.displayImage(this.viewer, out_img, this.viewport);
this._setup_tools();
},
_setup_tools: function () {
ctools.mouseInput.enable(this.viewer);
ctools.mouseWheelInput.enable(this.viewer);
ctools.wwwc.activate(this.viewer, 1); // Left Click
ctools.pan.activate(this.viewer, 2); // Middle Click
ctools.zoom.activate(this.viewer, 4); // Right Click
ctools.zoomWheel.activate(this.viewer); // Mouse Wheel
},
_disable_all_tools: function (element) {
// helper function used by the tool button handlers to disable the active tool
// before making a new tool active
ctools.wwwc.deactivate(element, 1);
ctools.pan.deactivate(element, 2); // 2 is middle mouse button
ctools.zoom.deactivate(element, 4); // 4 is right mouse button
ctools.length.deactivate(element, 1);
ctools.ellipticalRoi.deactivate(element, 1);
ctools.rectangleRoi.deactivate(element, 1);
ctools.angle.deactivate(element, 1);
ctools.highlight.deactivate(element, 1);
ctools.freehand.deactivate(element, 1);
ctools.probe.deactivate(element, 1);
},
activate_tool: function () {
var tool_name = this.model.get('_selected_tool');
console.log('switching to tool: ' + tool_name);
if (tool_name == 'reset') {
this._disable_all_tools(this.viewer);
cs.reset(this.viewer);
var toolStateManager = ctools.getElementToolStateManager(this.viewer);
// Note that this only works on ImageId-specific tool state managers (for now)
toolStateManager.clear(this.viewer);
cs.updateImage(this.viewer);
this.model.set('_tool_state_in', '');
this.model.set('_tool_state_out', '');
this._setup_tools();
} else {
this._disable_all_tools(this.viewer);
if (tool_name == 'zoom') {
ctools.zoom.activate(this.viewer, 1);
}
if (tool_name == 'window') {
ctools.wwwc.activate(this.viewer, 1);
}
if (tool_name == 'pan') {
ctools.pan.activate(this.viewer, 1);
ctools.zoom.activate(this.viewer, 2);
}
if (tool_name == 'bbox') {
ctools.rectangleRoi.enable(this.viewer);
ctools.rectangleRoi.activate(this.viewer, 1);
}
if (tool_name == 'probe') {
ctools.probe.enable(this.viewer);
ctools.probe.activate(this.viewer, 1);
}
if (tool_name == 'highlight') {
ctools.highlight.enable(this.viewer);
ctools.highlight.activate(this.viewer, 1);
}
if (tool_name == 'freehand') {
ctools.freehand.enable(this.viewer);
ctools.freehand.activate(this.viewer, 1);
}
}
},
update_cs_state: function () {
var new_state_json = this.model.get('_tool_state_in');
if (new_state_json.length > 1) {
var appState = JSON.parse(new_state_json);
console.log('updating state:' + new_state_json + ', ' + new_state_json.length);
ctools.appState.restore(appState);
}
},
zoom_changed: function () {
this.viewport.scale = this.model.get('img_scale');
cs.setViewport(this.viewer, this.viewport);
}
});
module.exports = {
CornerstoneModel: CornerstoneModel,
CornerstoneView: CornerstoneView
};