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var AmpersandView = require('ampersand-view'),
_ = require('lodash'),
$ = require('jquery'),
debug = require('debug')('view:viz');
module.exports = AmpersandView.extend({
_values: {},
_autoWidth: false,
_autoHeight: false,
props: {
data: 'any',
className: 'any',
vizFn: 'any',
debounceRender: {
type: 'boolean',
default: true
},
renderMode: {
type: 'string',
values: ['canvas', 'svg', 'html'],
default: 'svg'
},
width: {
type: 'any',
default: 'auto'
},
height: {
type: 'any',
default: 400
},
},
bindings: {
'width': [
{
type: 'attribute',
name: 'width',
hook: 'viz-container'
}
],
'height': {
type: 'attribute',
name: 'height',
hook: 'viz-container'
},
'className': {
type: 'attribute',
name: 'class',
hook: 'viz-container'
}
},
initialize: function(opts) {
if (this.width === 'auto' || this.width === undefined) {
this._autoWidth = true;
this.width = 0;
}
if (this.height === 'auto' || this.height === undefined) {
this._autoHeight = true;
this.height = 0;
}
if (this._autoWidth || this._autoHeight) {
if (this.debounceRender) {
window.addEventListener('resize', _.debounce(this.redraw.bind(this), 100));
} else {
window.addEventListener('resize',this.redraw.bind(this));
}
}
// pick canvas or svg template
switch (this.renderMode) {
case 'canvas':
this.template = '<canvas data-hook="viz-container" id="canvas"></canvas>';
break;
case 'svg':
this.template = '<svg data-hook="viz-container"></svg>';
break;
case 'html':
this.template = '<div data-hook="viz-container"></div>';
break;
}
},
_measure: function() {
if (this.el) {
if (this._autoWidth) {
this.width = $(this.el).parent().width();
}
if (this._autoHeight) {
this.height = $(this.el).parent().height();
}
}
},
_chooseDataSource: function() {
if (this.model !== undefined) {
this.data = this.model.toJSON();
} else if (this.collection !== undefined) {
this.data = this.collection.toJSON();
}
},
remove: function() {
window.removeEventListener('resize', this._onResize);
return this;
},
transform: function(data) {
return data;
},
render: function() {
this._chooseDataSource();
this.data = this.transform(this.data);
this.renderWithTemplate(this);
// measure only if width or height is missing
this._measure();
// call viz function
if (this.vizFn) {
this.vizFn = this.vizFn({
width: this.width,
height: this.height,
data: this.data,
el: this.el,
});
}
return this;
},
redraw: function() {
this._chooseDataSource();
this.data = this.transform(this.data);
this._measure();
if (this.vizFn) {
this.vizFn({
width: this.width,
height: this.height,
data: this.data,
el: this.el,
});
}
}
});
/**
* Shortcut so you don't have to know anything about ampersand
* and can just cut right to the d3.
*/
module.exports.create = function(className, vizFn) {
return module.exports.extend({
className: className,
vizFn: vizFn
});
};
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