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login form has 'save login' option (doesn't function yet) and layout looks peng

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Felix 2019-07-09 11:52:25 +01:00
parent c9ce563564
commit c389e2e005
3 changed files with 551 additions and 1 deletions
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395
lib/common/widgets/custom_checkbox.dart Normal file
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@ -0,0 +1,395 @@
// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
import 'dart:math' as math;
import 'package:flutter/rendering.dart';
import 'package:flutter/widgets.dart';
import 'package:flutter/material.dart';
/// A material design checkbox.
///
/// The checkbox itself does not maintain any state. Instead, when the state of
/// the checkbox changes, the widget calls the [onChanged] callback. Most
/// widgets that use a checkbox will listen for the [onChanged] callback and
/// rebuild the checkbox with a new [value] to update the visual appearance of
/// the checkbox.
///
/// The checkbox can optionally display three values - true, false, and null -
/// if [tristate] is true. When [value] is null a dash is displayed. By default
/// [tristate] is false and the checkbox's [value] must be true or false.
///
/// Requires one of its ancestors to be a [Material] widget.
///
/// See also:
///
/// * [CheckboxListTile], which combines this widget with a [ListTile] so that
/// you can give the checkbox a label.
/// * [Switch], a widget with semantics similar to [CustomCheckbox].
/// * [Radio], for selecting among a set of explicit values.
/// * [Slider], for selecting a value in a range.
/// * <https://material.io/design/components/selection-controls.html#checkboxes>
/// * <https://material.io/design/components/lists.html#types>
class CustomCheckbox extends StatefulWidget {
/// Creates a material design checkbox.
///
/// The checkbox itself does not maintain any state. Instead, when the state of
/// the checkbox changes, the widget calls the [onChanged] callback. Most
/// widgets that use a checkbox will listen for the [onChanged] callback and
/// rebuild the checkbox with a new [value] to update the visual appearance of
/// the checkbox.
///
/// The following arguments are required:
///
/// * [value], which determines whether the checkbox is checked. The [value]
/// can only be null if [tristate] is true.
/// * [onChanged], which is called when the value of the checkbox should
/// change. It can be set to null to disable the checkbox.
///
/// The value of [tristate] must not be null.
const CustomCheckbox({
Key key,
@required this.value,
this.tristate = false,
@required this.onChanged,
this.activeColor,
this.checkColor,
this.materialTapTargetSize,
this.useTapTarget = true,
}) : assert(tristate != null),
assert(tristate || value != null),
super(key: key);
final bool useTapTarget;
/// Whether this checkbox is checked.
///
/// This property must not be null.
final bool value;
/// Called when the value of the checkbox should change.
///
/// The checkbox passes the new value to the callback but does not actually
/// change state until the parent widget rebuilds the checkbox with the new
/// value.
///
/// If this callback is null, the checkbox will be displayed as disabled
/// and will not respond to input gestures.
///
/// When the checkbox is tapped, if [tristate] is false (the default) then
/// the [onChanged] callback will be applied to `!value`. If [tristate] is
/// true this callback cycle from false to true to null.
///
/// The callback provided to [onChanged] should update the state of the parent
/// [StatefulWidget] using the [State.setState] method, so that the parent
/// gets rebuilt; for example:
///
/// ```dart
/// Checkbox(
/// value: _throwShotAway,
/// onChanged: (bool newValue) {
/// setState(() {
/// _throwShotAway = newValue;
/// });
/// },
/// )
/// ```
final ValueChanged<bool> onChanged;
/// The color to use when this checkbox is checked.
///
/// Defaults to [ThemeData.toggleableActiveColor].
final Color activeColor;
/// The color to use for the check icon when this checkbox is checked
///
/// Defaults to Color(0xFFFFFFFF)
final Color checkColor;
/// If true the checkbox's [value] can be true, false, or null.
///
/// Checkbox displays a dash when its value is null.
///
/// When a tri-state checkbox is tapped its [onChanged] callback will be
/// applied to true if the current value is null or false, false otherwise.
/// Typically tri-state checkboxes are disabled (the onChanged callback is
/// null) so they don't respond to taps.
///
/// If tristate is false (the default), [value] must not be null.
final bool tristate;
/// Configures the minimum size of the tap target.
///
/// Defaults to [ThemeData.materialTapTargetSize].
///
/// See also:
///
/// * [MaterialTapTargetSize], for a description of how this affects tap targets.
final MaterialTapTargetSize materialTapTargetSize;
/// The width of a checkbox widget.
static const double width = 18.0;
@override
_CustomCheckboxState createState() => _CustomCheckboxState();
}
class _CustomCheckboxState extends State<CustomCheckbox> with TickerProviderStateMixin {
@override
Widget build(BuildContext context) {
assert(debugCheckHasMaterial(context));
final ThemeData themeData = Theme.of(context);
Size size;
switch (widget.materialTapTargetSize ?? themeData.materialTapTargetSize) {
case MaterialTapTargetSize.padded:
size = const Size(2 * kRadialReactionRadius + 8.0, 2 * kRadialReactionRadius + 8.0);
break;
case MaterialTapTargetSize.shrinkWrap:
size = const Size(2 * kRadialReactionRadius, 2 * kRadialReactionRadius);
break;
}
Size noTapTargetSize = Size(CustomCheckbox.width,
CustomCheckbox.width);
final BoxConstraints additionalConstraints =
BoxConstraints.tight(widget
.useTapTarget? size : noTapTargetSize);
return _CheckboxRenderObjectWidget(
value: widget.value,
tristate: widget.tristate,
activeColor: widget.activeColor ?? themeData.toggleableActiveColor,
checkColor: widget.checkColor ?? const Color(0xFFFFFFFF),
inactiveColor: widget.onChanged != null ? themeData.unselectedWidgetColor : themeData.disabledColor,
onChanged: widget.onChanged,
additionalConstraints: additionalConstraints,
vsync: this,
);
}
}
class _CheckboxRenderObjectWidget extends LeafRenderObjectWidget {
const _CheckboxRenderObjectWidget({
Key key,
@required this.value,
@required this.tristate,
@required this.activeColor,
@required this.checkColor,
@required this.inactiveColor,
@required this.onChanged,
@required this.vsync,
@required this.additionalConstraints,
this.useTapTarget = true
}) : assert(tristate != null),
assert(tristate || value != null),
assert(activeColor != null),
assert(inactiveColor != null),
assert(vsync != null),
super(key: key);
final bool value;
final bool tristate;
final Color activeColor;
final Color checkColor;
final Color inactiveColor;
final ValueChanged<bool> onChanged;
final TickerProvider vsync;
final BoxConstraints additionalConstraints;
final bool useTapTarget;
@override
_RenderCheckbox createRenderObject(BuildContext context) => _RenderCheckbox(
value: value,
tristate: tristate,
activeColor: activeColor,
checkColor: checkColor,
inactiveColor: inactiveColor,
onChanged: onChanged,
vsync: vsync,
additionalConstraints: additionalConstraints,
);
@override
void updateRenderObject(BuildContext context, _RenderCheckbox renderObject) {
renderObject
..value = value
..tristate = tristate
..activeColor = activeColor
..checkColor = checkColor
..inactiveColor = inactiveColor
..onChanged = onChanged
..additionalConstraints = additionalConstraints
..vsync = vsync;
}
}
const double _kEdgeSize = CustomCheckbox.width;
const Radius _kEdgeRadius = Radius.circular(1.0);
const double _kStrokeWidth = 2.0;
class _RenderCheckbox extends RenderToggleable {
_RenderCheckbox({
bool value,
bool tristate,
Color activeColor,
this.checkColor,
Color inactiveColor,
BoxConstraints additionalConstraints,
ValueChanged<bool> onChanged,
@required TickerProvider vsync,
}) : _oldValue = value,
super(
value: value,
tristate: tristate,
activeColor: activeColor,
inactiveColor: inactiveColor,
onChanged: onChanged,
additionalConstraints: additionalConstraints,
vsync: vsync,
);
bool _oldValue;
Color checkColor;
@override
set value(bool newValue) {
if (newValue == value)
return;
_oldValue = value;
super.value = newValue;
}
@override
void describeSemanticsConfiguration(SemanticsConfiguration config) {
super.describeSemanticsConfiguration(config);
config.isChecked = value == true;
}
// The square outer bounds of the checkbox at t, with the specified origin.
// At t == 0.0, the outer rect's size is _kEdgeSize (Checkbox.width)
// At t == 0.5, .. is _kEdgeSize - _kStrokeWidth
// At t == 1.0, .. is _kEdgeSize
RRect _outerRectAt(Offset origin, double t) {
final double inset = 1.0 - (t - 0.5).abs() * 2.0;
final double size = _kEdgeSize - inset * _kStrokeWidth;
final Rect rect = Rect.fromLTWH(origin.dx + inset, origin.dy + inset, size, size);
return RRect.fromRectAndRadius(rect, _kEdgeRadius);
}
// The checkbox's border color if value == false, or its fill color when
// value == true or null.
Color _colorAt(double t) {
// As t goes from 0.0 to 0.25, animate from the inactiveColor to activeColor.
return onChanged == null
? inactiveColor
: (t >= 0.25 ? activeColor : Color.lerp(inactiveColor, activeColor, t * 4.0));
}
// White stroke used to paint the check and dash.
void _initStrokePaint(Paint paint) {
paint
..color = checkColor
..style = PaintingStyle.stroke
..strokeWidth = _kStrokeWidth;
}
void _drawBorder(Canvas canvas, RRect outer, double t, Paint paint) {
assert(t >= 0.0 && t <= 0.5);
final double size = outer.width;
// As t goes from 0.0 to 1.0, gradually fill the outer RRect.
final RRect inner = outer.deflate(math.min(size / 2.0, _kStrokeWidth + size * t));
canvas.drawDRRect(outer, inner, paint);
}
void _drawCheck(Canvas canvas, Offset origin, double t, Paint paint) {
assert(t >= 0.0 && t <= 1.0);
// As t goes from 0.0 to 1.0, animate the two check mark strokes from the
// short side to the long side.
final Path path = Path();
const Offset start = Offset(_kEdgeSize * 0.15, _kEdgeSize * 0.45);
const Offset mid = Offset(_kEdgeSize * 0.4, _kEdgeSize * 0.7);
const Offset end = Offset(_kEdgeSize * 0.85, _kEdgeSize * 0.25);
if (t < 0.5) {
final double strokeT = t * 2.0;
final Offset drawMid = Offset.lerp(start, mid, strokeT);
path.moveTo(origin.dx + start.dx, origin.dy + start.dy);
path.lineTo(origin.dx + drawMid.dx, origin.dy + drawMid.dy);
} else {
final double strokeT = (t - 0.5) * 2.0;
final Offset drawEnd = Offset.lerp(mid, end, strokeT);
path.moveTo(origin.dx + start.dx, origin.dy + start.dy);
path.lineTo(origin.dx + mid.dx, origin.dy + mid.dy);
path.lineTo(origin.dx + drawEnd.dx, origin.dy + drawEnd.dy);
}
canvas.drawPath(path, paint);
}
void _drawDash(Canvas canvas, Offset origin, double t, Paint paint) {
assert(t >= 0.0 && t <= 1.0);
// As t goes from 0.0 to 1.0, animate the horizontal line from the
// mid point outwards.
const Offset start = Offset(_kEdgeSize * 0.2, _kEdgeSize * 0.5);
const Offset mid = Offset(_kEdgeSize * 0.5, _kEdgeSize * 0.5);
const Offset end = Offset(_kEdgeSize * 0.8, _kEdgeSize * 0.5);
final Offset drawStart = Offset.lerp(start, mid, 1.0 - t);
final Offset drawEnd = Offset.lerp(mid, end, t);
canvas.drawLine(origin + drawStart, origin + drawEnd, paint);
}
@override
void paint(PaintingContext context, Offset offset) {
final Canvas canvas = context.canvas;
paintRadialReaction(canvas, offset, size.center(Offset.zero));
final Offset origin = offset + (size / 2.0 - const Size.square(_kEdgeSize) / 2.0);
final AnimationStatus status = position.status;
final double tNormalized = status == AnimationStatus.forward || status == AnimationStatus.completed
? position.value
: 1.0 - position.value;
// Four cases: false to null, false to true, null to false, true to false
if (_oldValue == false || value == false) {
final double t = value == false ? 1.0 - tNormalized : tNormalized;
final RRect outer = _outerRectAt(origin, t);
final Paint paint = Paint()..color = _colorAt(t);
if (t <= 0.5) {
_drawBorder(canvas, outer, t, paint);
} else {
canvas.drawRRect(outer, paint);
_initStrokePaint(paint);
final double tShrink = (t - 0.5) * 2.0;
if (_oldValue == null || value == null)
_drawDash(canvas, origin, tShrink, paint);
else
_drawCheck(canvas, origin, tShrink, paint);
}
} else { // Two cases: null to true, true to null
final RRect outer = _outerRectAt(origin, 1.0);
final Paint paint = Paint() ..color = _colorAt(1.0);
canvas.drawRRect(outer, paint);
_initStrokePaint(paint);
if (tNormalized <= 0.5) {
final double tShrink = 1.0 - tNormalized * 2.0;
if (_oldValue == true)
_drawCheck(canvas, origin, tShrink, paint);
else
_drawDash(canvas, origin, tShrink, paint);
} else {
final double tExpand = (tNormalized - 0.5) * 2.0;
if (value == true)
_drawCheck(canvas, origin, tExpand, paint);
else
_drawDash(canvas, origin, tExpand, paint);
}
}
}
}

132
lib/common/widgets/labeled_checkbox.dart Normal file
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@ -0,0 +1,132 @@
import 'package:flutter/material.dart';
import 'package:local_spend/common/widgets/custom_checkbox.dart';
class LabeledCheckboxWithIcon extends StatelessWidget {
const LabeledCheckboxWithIcon({
this.label,
this.textStyle,
this.icon,
// this.iconSize,
this.iconColor,
this.padding,
this.value,
this.onChanged,
});
final String label;
final TextStyle textStyle;
final IconData icon;
// final double iconSize;
final Color iconColor;
final EdgeInsets padding;
final bool value;
final Function onChanged;
@override
Widget build(BuildContext context) {
return InkWell(
onTap: () {
onChanged(!value);
},
child: Padding(
padding: padding,
child: Row(
crossAxisAlignment: CrossAxisAlignment.center,
children: <Widget>[
Padding(
padding: EdgeInsets.fromLTRB(0, 0, 0, 0),
child : Icon(
icon,
// size: iconSize,
color: iconColor,
),
),
Expanded(child: Text(label, style: textStyle, textAlign: TextAlign.center,)),
CustomCheckbox(
//custom checkbox removes padding so the form looks nice
value: value,
useTapTarget: false,
onChanged: (bool newValue) {
onChanged(newValue);
},
),
],
),
),
);
}
}
class LabeledCheckbox extends StatelessWidget {
const LabeledCheckbox({
this.label,
this.textStyle,
this.padding,
this.value,
this.onChanged,
});
final String label;
final TextStyle textStyle;
final EdgeInsets padding;
final bool value;
final Function onChanged;
@override
Widget build(BuildContext context) {
return InkWell(
onTap: () {
onChanged(!value);
},
child: Padding(
padding: padding,
child: Row(
children: <Widget>[
Expanded(child: Text(label, style: textStyle)),
Checkbox(
value: value,
onChanged: (bool newValue) {
onChanged(newValue);
},
),
],
),
),
);
}
}
/*
//USAGE:
bool _isSelected = false;
@override
Widget build(BuildContext context) {
return Scaffold(
body: Center(
child: LabeledCheckbox(
label: 'Label Text Here',
padding: const EdgeInsets.fromLTRB(0, 0, 0, 0),
value: _isSelected,
onChanged: (bool newValue) {
setState(() {
_isSelected = newValue;
});
},
),
),
);
}
*/

25
lib/pages/login_page.dart
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@ -7,6 +7,7 @@ import 'package:local_spend/common/functions/show_dialog_single_button.dart';
import 'package:local_spend/common/platform/platform_scaffold.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'package:url_launcher/url_launcher.dart';
import 'package:local_spend/common/widgets/labeled_checkbox.dart';
const URL = "https://flutter.io/";
@ -20,6 +21,8 @@ class LoginPage extends StatefulWidget {
class LoginPageState extends State<LoginPage> {
final TextEditingController _emailController = TextEditingController(/*text: 'test@example.com'*/); // remove
final TextEditingController _passwordController = TextEditingController(/*text: 'abc123'*/); // remove
bool _saveLoginDetails = true; // I am extremely sorry for the placement of this variable
// it will be fixed soon I promise
FocusNode focusNode; // added so focus can move automatically
@ -162,7 +165,7 @@ class LoginPageState extends State<LoginPage> {
// ),
// ),
Padding(
padding: EdgeInsets.fromLTRB(0.0, 35.0, 0.0, 100.0),
padding: EdgeInsets.fromLTRB(0.0, 25.0, 0.0, 15.0),
child : Material(
child : InkWell(
@ -184,6 +187,26 @@ class LoginPageState extends State<LoginPage> {
color: Colors.blueAccent,
),
),
Padding(
padding: EdgeInsets.fromLTRB(0, 10, 0, 50),
child: LabeledCheckboxWithIcon(
label : "SAVE LOGIN",
textStyle: TextStyle(fontSize: 18, color: Colors.black54, fontWeight: FontWeight.bold),
icon: Icons.account_box,
// iconSize: 18,
iconColor: Colors.black54,
padding: const EdgeInsets.fromLTRB(0,0,0,0),
value : _saveLoginDetails,
onChanged: (bool newValue) {
setState(() {
_saveLoginDetails = newValue;
});
},
),
),
],
),
),