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Add "scrolling" support for Select and MultiSelect menus #17

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Add "scrolling" support for Select and MultiSelect menus #17

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bfb7a19
Fixed issue when Select had more lines than free terminal lines.
alexgarbarev Dec 1, 2023
8ea5d26
Add MultiSelect scrolling support
alexgarbarev Dec 1, 2023
6af34c6
Add MultiSelect scrolling support (bugfix)
alexgarbarev Dec 1, 2023
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16 changes: 15 additions & 1 deletion lib/src/multi_select.dart
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Original file line number Diff line number Diff line change
@@ -1,3 +1,5 @@
import 'dart:io';

import 'package:dart_console/dart_console.dart';
import 'package:interact/src/framework/framework.dart';
import 'package:interact/src/theme/theme.dart';
Expand Down Expand Up @@ -40,6 +42,7 @@ class MultiSelect extends Component<List<int>> {
class _MultiSelectState extends State<MultiSelect> {
late List<int> selection;
late int index;
int offset = 0;

@override
void init() {
Expand Down Expand Up @@ -97,9 +100,20 @@ class _MultiSelectState extends State<MultiSelect> {
super.dispose();
}

int maxLength() {
final lines = stdout.terminalLines - 3;
return lines > component.options.length ? component.options.length : lines;
}

@override
void render() {
for (var i = 0; i < component.options.length; i++) {
final length = maxLength();
if (index >= offset + length) {
offset = index - length + 1;
} else if (index < offset) {
offset = index;
}
for (var i = offset; i < offset + length; i++) {
final option = component.options[i];
final line = StringBuffer();

Expand Down
16 changes: 15 additions & 1 deletion lib/src/select.dart
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -1,3 +1,5 @@
import 'dart:io';

import 'package:dart_console/dart_console.dart';
import 'package:interact/src/framework/framework.dart';
import 'package:interact/src/theme/theme.dart';
Expand Down Expand Up @@ -41,6 +43,7 @@ class Select extends Component<int> {

class _SelectState extends State<Select> {
int index = 0;
int offset = 0;

@override
void init() {
Expand Down Expand Up @@ -79,9 +82,20 @@ class _SelectState extends State<Select> {
super.dispose();
}

int maxLength() {
final lines = stdout.terminalLines - 3;
return lines > component.options.length ? component.options.length : lines;
}

@override
void render() {
for (var i = 0; i < component.options.length; i++) {
final length = maxLength();
if (index >= offset + length) {
offset = index - length + 1;
} else if (index < offset) {
offset = index;
}
for (var i = offset; i < offset + length; i++) {
final option = component.options[i];
final line = StringBuffer();

Expand Down