columns
Description
Optional. An array of objects with configuration parameters for columns in the grid areaUsage
columns?: false | {
id?: string;
width?: number;
align?: "left" | "right" | "center";
flexgrow?: number;
resize?: boolean;
sort?: boolean;
header?: string | IHeaderCellConfig | (string | IHeaderCellConfig)[];
footer?: string | IHeaderCellConfig | (string | IHeaderCellConfig)[];
cell?: Component<ICellProps>;
template?: (value: any, row: IRow, col: IColumn) => string;
editor?: TEditorType | IColumnEditorConfig | TEditorHandlerConfig;
options?: IOption[];
}[];
Expanded signature:
columns?: false | {
// column id
id?: string;
// width of the column
width?: number | string; // CSS width (default "120px")
// text alignment
align?: "left" | "right" | "center"; // default "left"
// flex grow factor
flexgrow?: number;
// enable/disable resize by drag handle
resize?: boolean; // default true
// enable/disable sorting
sort?: boolean; // default true
// header configuration
header?:
| string
| {
// IHeaderCellConfig
id?: string;
text?: string;
cell?: any;
css?: string;
rowspan?: number;
colspan?: number;
collapsible?: boolean | "first" | "header";
collapsed?: boolean;
}
| (string | {
id?: string;
text?: string;
cell?: any;
css?: string;
rowspan?: number;
colspan?: number;
collapsible?: boolean | "first" | "header";
collapsed?: boolean;
})[];
// footer (same as header)
footer?:
| string
| {
id?: string;
text?: string;
cell?: any;
css?: string;
rowspan?: number;
colspan?: number;
collapsible?: boolean | "first" | "header";
collapsed?: boolean;
}
| (string | {
id?: string;
text?: string;
cell?: any;
css?: string;
rowspan?: number;
colspan?: number;
collapsible?: boolean | "first" | "header";
collapsed?: boolean;
})[];
// template function for cell rendering
template?: (value: any, row: IRow, col: IColumn) => string;
// custom Svelte component for cell rendering
cell?: Component<{
api: IApi;
row: IRow;
column: IColumn;
onaction: (ev: { action?: any; data?: { [key: string]: any } }) => void;
}>;
// editor configuration
// IColumnEditorConfig | TEditorHandlerConfig | TEditorType
editor?:
| "text"
| "combo"
| "datepicker"
| "richselect"
| {
type: "text" | "combo" | "datepicker" | "richselect";
config?: {
template?: (v: any) => string;
cell?: any | Component<{
data: any;
onaction: (ev: {
action?: any;
data?: { [key: string]: any };
}) => void;
}>;
options?: { id: string | number; label: string }[];
buttons?: ("clear" | "today")[];
};
}
| ((
row?: IRow,
column?: IColumn
) => "text" | "combo" | "datepicker" | "richselect" | {
type: "text" | "combo" | "datepicker" | "richselect";
config?: {
template?: (v: any) => string;
cell?: any | Component<{
data: any;
onaction: (ev: {
action?: any;
data?: { [key: string]: any };
}) => void;
}>;
options?: { id: string | number; label: string }[];
buttons?: ("clear" | "today")[];
};
} | null);
// predefined options for editors (combo, richselect)
// IOption
options?: { id: string | number; label: string }[];
}[];
Parameters
flexgrow(optional) specifies how much space (width) relative to the grid width the column will take (it will take no effect on columns with the set width); the property is specified as a number (ifflexgrowis set to 1 in one column only, the column will take the full available width)width- (optional) the column width value from here; the default value is "120px"align- (optional) the text align value from here; the default value is "left"resize- (optional) enables ("true" - default) or disables ("false") a drag handle for column resizingheader- (optional)IColumnHeaderobject can be one of the following:- string - a plain text label for the column header
IHeaderCell– an object with the following parameters:id?: string– identifier of the header cell (useful for referencing or merging)text?: string– the text displayed in the header cellcell?: any– a custom cell renderer or configuration objectcss?: string– CSS class name(s) applied to the header cellrowspan?: number– number of rows the header cell should spancolspan?: number– number of columns the header cell should spancollapsible?: boolean | "first" | "header"– whether the header group can be collapsedcollapsed?: boolean– defines whether the header is initially collapsed
(string | IHeaderCell)[]- an array of either plain strings or header cell objects, useful for creating multi-row headers
sort- (optional) if set to true (default), enables sorting in a column; if false, the sorting is disabledtemplate?: (value: any, row: IRow, col: IColumn) => string;- (optional) applies a template to a column;value– the value of the current cellrow– the row object of type IRowcol– the column object of type IColumn
cell- (optional) the name of a custom Svelte component to be applied inside a cell; e.g., cell: CheckboxCelleditor– (optional) enables inline editing in a grid column cell.
It can be either:- a string with the editor type (one of:
"text" | "combo" | "datepicker" | "richselect"), or - an object with the following parameters:
type(string) – the editor typeconfig(optional) – an object with editor configuration settings (for all editor types except"text"):cell– (optional) a custom component used inside the editortemplate– (optional) a function that takes an option value and returns a string to display:template?: (v: any) => string;options– (optional) an array of selectable options for"combo"or"richselect"editorsbuttons– (optional) an array of extra buttons, e.g.["clear" | "today"](used in"datepicker")
- a string with the editor type (one of:
options- (optional) property provides the list of selectable values for editors like "combo" or "richselect". Each option object has the following structure:id: string|number– unique identifier of the optionlabel: string– display text for the option
The columns property can be set to false to hide the tasks tree area.
Default config
[
{ id: "text", header: "Task name", flexgrow: 1, sort: true },
{ id: "start", header: "Start date", align: "center", sort: true },
{ id: "duration", header: "Duration", width: 90, align: "center", sort: true },
{ id: "add-task", header: "", width: 50, align: "center" },
];
Example
<script>
import { getData } from "./common/data";
import { Gantt } from "@svar-ui/svelte-gantt";
const data = getData();
const columns = [
{ id: "text", header: "Task name", flexgrow: 2 },
{
id: "start",
header: "Start date",
flexgrow: 1,
align: "center",
},
{
id: "duration",
header: "Duration",
align: "center",
flexgrow: 1,
},
{
id: "add-task",
header: "",
width: 50,
align: "center",
},
];
</script>
<Gantt tasks={data.tasks} links={data.links} scales={data.scales} {columns} />
In the next example the area with tasks tree is hidden by setting columns to false:
<script>
import { getData } from "./common/data";
import { Gantt } from "@svar-ui/svelte-gantt";
const data = getData();
</script>
<Gantt
tasks={data.tasks}
links={data.links}
scales={data.scales}
columns={false} />