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visualization.js
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visualization.js
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/*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* Base class for visualization.
*/
export default class Visualization {
constructor(targetEl, config) {
this.targetEl = targetEl;
this.config = config;
this._dirty = false;
this._active = false;
this._emitter = () => {};
}
/**
* Get transformation.
* @abstract
* @return {Transformation}
*/
getTransformation() {
// override this
throw new TypeError('Visualization.getTransformation() should be overrided');
}
/**
* Method will be invoked when data or configuration changed.
* @abstract
*/
render(tableData) {
// override this
throw new TypeError('Visualization.render() should be overrided');
}
/**
* Refresh visualization.
*/
refresh() {
// override this
console.warn('A chart is missing refresh function, it might not work preperly');
}
/**
* Method will be invoked when visualization need to be destroyed.
* Don't need to destroy this.targetEl.
*/
destroy() {
// override this
}
/**
* return {
* template : angular template string or url (url should end with .html),
* scope : an object to bind to template scope
* }
*/
getSetting() {
// override this
}
/**
* Activate. Invoked when visualization is selected.
*/
activate() {
if (!this._active || this._dirty) {
this.refresh();
this._dirty = false;
}
this._active = true;
}
/**
* Deactivate. Invoked when visualization is de selected.
*/
deactivate() {
this._active = false;
}
/**
* Is active.
*/
isActive() {
return this._active;
}
/**
* When window or paragraph is resized.
*/
resize() {
if (this.isActive()) {
this.refresh();
} else {
this._dirty = true;
}
}
/**
* Set new config.
*/
setConfig(config) {
this.config = config;
if (this.isActive()) {
this.refresh();
} else {
this._dirty = true;
}
}
/**
* Emit config. config will sent to server and saved.
*/
emitConfig(config) {
this._emitter(config);
}
/**
* Render setting.
*/
renderSetting(targetEl) {
let setting = this.getSetting();
if (!setting) {
return;
}
// already readered
if (this._scope) {
let self = this;
this._scope.$apply(function() {
for (let k in setting.scope) {
if (setting.scope.hasOwnProperty(k)) {
self._scope[k] = setting.scope[k];
}
}
for (let k in self._prevSettingScope) {
if (!setting.scope[k]) {
self._scope[k] = setting.scope[k];
}
}
});
return;
} else {
this._prevSettingScope = setting.scope;
}
let scope = this._createNewScope();
for (let k in setting.scope) {
if (setting.scope.hasOwnProperty(k)) {
scope[k] = setting.scope[k];
}
}
let template = setting.template;
if (template.split('\n').length === 1 &&
template.endsWith('.html')) { // template is url
this._templateRequest(template).then((t) =>
_renderSetting(this, targetEl, t, scope)
);
} else {
_renderSetting(this, targetEl, template, scope);
}
}
}
function _renderSetting(instance, targetEl, template, scope) {
instance._targetEl = targetEl;
targetEl.html(template);
instance._compile(targetEl.contents())(scope);
instance._scope = scope;
}