Dashboard Item Caption in the Web Dashboard
- 7 minutes to read
Each dashboard item has a caption that is displayed at the top of this item. The caption can contain static text, svg images, and command buttons. These elements are called toolbar items:
Caption Overview
You can control the dashboard item caption’s visibility.
- When the caption is on, it is always displayed at the top of the dashboard item. Some command buttons are displayed when you hover the mouse pointer over them.
- When the caption is off, it is not visible by default. Some command buttons are displayed in a floating panel when you hover the mouse pointer over them. On touch-based devices, an additional tap is required to show caption elements when the caption is hidden.
Go to the dashboard item’s Options menu and use the Show Caption option to control the caption visibility:
Use the DashboardItem.showCaption property to control the caption visibility in code.
Note
The Range Filter dashboard item’s caption is not visible by default.
The dashboard item caption consists of the following collections:
- A static item is visible only if the caption is enabled (for example, the item caption or limit visible data icon).
- An action item is displayed only when the mouse pointer hovers over the dashboard item caption (for instance, the Export To and Values buttons).
- A state item is displayed only in specific dashboard states (for example, the Drill Up and Clear Master Filter buttons).
- A navigation item allows you to navigate through different dashboard screens (for example, Dashboards and Back buttons in a mobile layout).
The table below lists the default information and buttons that are displayed in the dashboard item caption:
Static items |
| Limit Visble Data icon | When orange, indicates that visible data is limited. Click the icon to load all data. |
Text | Drill-Down Text | Shows a value or values from the current drill-down hierarchy. See Drill-Down for more details. | |
Text | Caption Text | Shows a static text in the caption. Use the DashboardItem.name property to set a caption text. | |
Action items |
| Maximize button | Expands any dashboard item to fit the whole dashboard and allows you to view data in greater detail. Refer to Dashboard Layout in the Web Dashboard for more information. |
| Restore button | Restores the expanded item to its initial state. | |
| Export to button | Invokes the export menu for a dashboard item. For information on how to export individual dashboard items, see Exporting. | |
| Inspect Data button | Invokes the Data Inspector that contains two grids that display raw and aggregated data for the current dashboard item. | |
| Values button | Invokes a drop-down menu that allows you to switch between provided values (in the pie, card, gauge, and maps dashboard items). For more information, see the Providing Data topic for the corresponding dashboard item. | |
| Multi-Select button | Allows you to filter data by selecting multiple elements in dashboard items. | |
| Select Date Time Period menu/button | Allows you to select date-time periods for the RangeFilter and DateFilter items. | |
| Filters button | Displays filters affecting the current dashboard item or entire dashboard. This button is only available in a mobile layout. | |
State items |
| Clear Master Filter button | Allows you to reset filters when a dashboard item acts as the Master Filter. For more information, see Master Filtering. |
| Drill Up button | Allows you to return to the previous detail level when this item’s drill-down capability is enabled. | |
| Clear Selection button | Allows you to clear the selection inside an item. | |
| Initial Extent button | Restores the default size and position of the Map dashboard items. | |
Navigation items | Dashboards | Dashboards button | Displays a list of available dashboards. |
| Back button | Returns to the dashboard items list. |
Customization
The Web Dashboard allows you to customize the dashboard item’s caption and dashboard title. For instance, you can add custom command buttons, create additional menus, add static texts, and so on.
Handle the ItemCaptionToolbarUpdated event to customize the dashboard item caption. The e.options property provides access to the caption’s options (DashboardItemCaptionToolbarOptions). The DashboardItemCaptionToolbarOptions object allows you to access a specific toolbar item’s collection (like static or action items) and get the available toolbar items in each collection. A toolbar item is the ViewerToolbarItem object.
Use the e.dashboardItem and e.itemName properties to identify a dashboard item for which the event is raised.
Predefined Colors
You can use predefined colors for toolbar icons to make the icons consistent with the entire dashboard application. For example, you can use the predefined color for a new item caption button. In this case, the button’s color depends on the selected Web Dashboard theme.
The table below lists the available predefined color classes:
| Class Name | Description |
|---|---|
| dx-dashboard-icon | The theme’s primary color. |
| dx-dashboard-contrast-icon | The theme’s additional color. |
| dx-dashboard-accent-icon | The theme’s accent color. |
| dx-dashboard-green-icon | A green hue based on the theme. |
| dx-dashboard-red-icon | A red hue based on the theme. |
| dx-dashboard-yellow-icon | A yellow hue based on the theme. |
Add the class="Class Name" attribute to the icon’s svg definition to specify the icon’s color.
<div style="display: none;">
<svg id="green-circle" class="dx-dashboard-green-icon" viewBox="0 0 24 24" width="48" height="48"><circle cx="12" cy="12" r="11" /></svg>
<svg id="yellow-circle" class="dx-dashboard-yellow-icon" viewBox="0 0 24 24" width="48" height="48"><circle cx="12" cy="12" r="11" /></svg>
<svg id="red-circle" class="dx-dashboard-red-icon" viewBox="0 0 24 24" width="48" height="48"><circle cx="12" cy="12" r="11" /></svg>
</div>
For the dx-dashboard-icon class, you can change an icon’s color when it is hovered (like the Maximize or Export to buttons). To do this, add the style="fill: currentColor" attribute to the svg definition:
<div style="display: none;">
<svg id="base-triangle" class="dx-dashboard-icon" style="fill: currentColor" viewBox="0 0 24 24" width="24" height="24"><path d="M12 3 L3 21 L21 21 Z" /></svg>
<svg id="base-circle" class="dx-dashboard-icon" style="fill: currentColor" viewBox="0 0 24 24" width="24" height="24"><circle cx="12" cy="12" r="11" /></svg>
</div>
Tip
You can call the ResourceManager.registerIcon method and pass the icon’s id as an alternative variant to add an icon to the page. See the Custom Item tutorials for an example: Create a Static Custom Item for the Web Dashboard.
Example
The following example shows how to add a toolbar item to the dashboard item caption: add a new toolbar item, customize the existing toolbar item, and delete a specific element from the toolbar items collection.
The customizeCaptionToolbar function below do the following:
- Creates a custom button for each dashboard item. The
itemClickmethod call returns the item’s component name. - Creates a custom button with a pop-up menu for the Chart dashboard item. The button belongs to the DashboardItemCaptionToolbarOptions.actionItems collection and is displayed only when the mouse pointer hovers over the dashboard item caption. The pop-up menu contains three icon elements. The
itemClickmethod call returns a name of the clicked item. - Changes the ListBox caption to ‘Filter’.
- Removes the caption text for the Chart dashboard item.
The image below shows the added toolbar items:
Handle the ViewerApiExtensionOptions.onItemCaptionToolbarUpdated event depending on your platform and call the custom customizeCaptionToolbar function in the event handler:
function customizeCaptionToolbar(e) {
// Add a new toolbar item to the caption for each dashboard item.
e.options.actionItems.push({
type: "button",
icon: "base-triangle",
hint: "Show Component Name",
click: function () {
DevExpress.ui.notify("The component name of this dashboard item is " + e.itemName, "info");
}
});
// Add a new toolbar item to the caption for the specific Chart item.
if (e.itemName === "chartDashboardItem1") {
e.options.actionItems.push({
type: "menu",
icon: "base-circle",
menu: {
type: "icons",
items: ["green-circle", "yellow-circle", "red-circle"],
selectionMode: "none",
title: "Circles",
itemClick: function (itemData) {
DevExpress.ui.notify("This is " + itemData.toString(), "success");
}
}
});
}
// Change the existing toolbar item in the caption.
if (e.itemName === "listBoxDashboardItem1") {
var caption = e.options.staticItems.filter(function (item) {
return item.name === 'item-caption'
});
if (caption.length > 0) {
caption[0].text = 'Filter';
}
}
// Remove the existing toolbar item from the caption.
if (e.itemName === "chartDashboardItem1") {
e.options.staticItems = e.options.staticItems.filter(function (item) {
return item.name !== 'item-caption'
});
}
}
See the following topic for more information about available client-side customization capabilities: DashboardControl’s Client-Side API Overview.
Refer to the Array documentation for information on how to manage the collection of toolbar items.