JavaScript/jQuery TreeMap Methods
beginUpdate()
Postpones rendering that can negatively affect performance until the endUpdate() method is called.
The beginUpdate() and endUpdate() methods reduce the number of renders in cases where extra rendering can negatively affect performance.
See Also
dispose()
jQuery
After calling this method, remove the DOM element associated with the UI component:
$("#myTreeMap").dxTreeMap("dispose");
$("#myTreeMap").remove();Angular
Use conditional rendering instead of this method:
<dx-tree-map ...
*ngIf="condition">
</dx-tree-map>Vue
Use conditional rendering instead of this method:
<template>
<DxTreeMap ...
v-if="condition">
</DxTreeMap>
</template>
<script>
import DxTreeMap from 'devextreme-vue/tree-map';
export default {
components: {
DxTreeMap
}
}
</script>React
Use conditional rendering instead of this method:
import React from 'react';
import TreeMap from 'devextreme-react/tree-map';
function DxTreeMap(props) {
if (!props.shouldRender) {
return null;
}
return (
<TreeMap ... >
</TreeMap>
);
}
class App extends React.Component {
render() {
return (
<DxTreeMap shouldRender="condition" />
);
}
}
export default App;drillUp()
To learn how to implement the drill down functionality, see the drillDown() method description.
endUpdate()
Refreshes the UI component after a call of the beginUpdate() method.
The beginUpdate() and endUpdate() methods reduce the number of renders in cases where extra rendering can negatively affect performance.
See Also
getCurrentNode()
The Node object.
See Also
getDataSource()
Gets the DataSource instance.
See Also
getInstance(element)
getInstance is a static method that the UI component class supports. The following code demonstrates how to get the TreeMap instance found in an element with the myTreeMap ID:
// Modular approach
import TreeMap from "devextreme/viz/tree_map";
...
let element = document.getElementById("myTreeMap");
let instance = TreeMap.getInstance(element) as TreeMap;
// Non-modular approach
let element = document.getElementById("myTreeMap");
let instance = DevExpress.viz.dxTreeMap.getInstance(element);See Also
getSize()
Returns an object with the following fields.
- width
The width of the UI component in pixels. - height
The height of the UI component in pixels.
See Also
hideLoadingIndicator()
Although the loading indicator hides automatically once the UI component is ready, you can hide it from code at the required moment using this method.
See Also
hideTooltip()
Hides the tooltip.
Use this and showTooltip() methods to change the visibility of the tooltip programmatically.
See Also
on(eventName, eventHandler)
Use this method to subscribe to one of the events listed in the Events section.
See Also
on(events)
Use this method to subscribe to several events with one method call. Available events are listed in the Events section.
See Also
render()
Normally, the UI component redraws itself automatically after the browser window is resized. But on rare occasions, you may need to request the redrawing, for example, after the UI component's container is resized. For this purpose, call the render() method.
See Also
resetDrillDown()
Calling this method makes the root level the current one. If you need to drill one level up or down, use the drillUp() method of the UI component or the drillDown() method of a node.