Struct ExpressionEditor 

pub struct ExpressionEditor { /* private fields */ }

An expression editor, as report designers have: the expression in several lines, the fields, parameters, functions, operators and constants that can go in it, a search, the signature and description of the chosen one, and a check as the text changes.

A click on an item shows what it is; a second click, or the insert button, puts it where the caret is. Syntax errors say their line and column; fields, parameters and functions the editor does not know are listed apart, since the expression may still run where they exist.

use ravenrs_reactive::State;
use ravenrs_widgets::{ExpressionEditor, FilterField, FilterFieldKind, Ui};

let expression = State::new("[Quantity] * [UnitPrice]".to_owned());
let editor = ExpressionEditor::new(expression.binding())
    .field(FilterField::new("Quantity", "Quantity", FilterFieldKind::Number))
    .field(FilterField::new("UnitPrice", "Unit price", FilterFieldKind::Number))
    .parameter(FilterField::new("MinTotal", "Least total", FilterFieldKind::Number));
let mut ui = Ui::new(editor, ravenrs_style::Theme::raven_dark());
ui.update();

Implementations

impl ExpressionEditor

pub fn new(value: Binding<String>) -> Self

An editor of value, offering the built-in functions, operators and constants.

pub fn field(self, field: FilterField) -> Self

Offers a field, written [name]; a dotted name reads a nested value.

pub fn fields(self, fields: impl IntoIterator<Item = FilterField>) -> Self

Offers these fields.

pub fn parameter(self, parameter: FilterField) -> Self

Offers a parameter, written ?name.

pub fn parameters( self, parameters: impl IntoIterator<Item = FilterField>, ) -> Self

Offers these parameters.

pub fn rows(self, rows: usize) -> Self

How many lines of the expression show before it scrolls (5 by default).

Trait Implementations

impl Debug for ExpressionEditor

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl View for ExpressionEditor

fn build(&self, cx: &mut BuildCx<'_>) -> NodeId

Creates this view’s node for the current build.

fn type_name(&self) -> &'static str

The name the diagnostics panel shows this view’s cost under.