87 lines
3.0 KiB
Dart
87 lines
3.0 KiB
Dart
import 'package:flutter/material.dart';
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import 'package:flutter/services.dart';
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import 'dart:convert';
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import 'dart:async';
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import 'main.dart';
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abstract class BaseState<T> extends State<T> {
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bool loading = false;
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String error = null;
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String textFieldValue = "";
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AppBar getAppBar() {
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return new AppBar(title: new Text(getTitle(), style: new TextStyle(fontSize: 18.0)),
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backgroundColor: primaryColor, actions: getMenuButtons());
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}
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String getTitle();
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String getHint();
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getMenuButtons();
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/// Метод возвращает контейнер с отступами, который содержит картинку с логотипом.
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getLogo() {
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double containerHeight = 92.0;
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double imageWidth = 156.0;
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return new Container(height: containerHeight, child: new Image.asset(logo_png, width: imageWidth));
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}
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getHintLabel() {
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double horizontalMargin = 8.0;
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return new Container(margin: new EdgeInsets.only(top: horizontalMargin, bottom: horizontalMargin, left: verticalMargin, right: verticalMargin),
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child: new Row(crossAxisAlignment: CrossAxisAlignment.start,
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children: <Widget>[new Text(getHintText(), overflow: TextOverflow.ellipsis, textAlign: TextAlign.left,
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style: new TextStyle(fontWeight: FontWeight.w300, color: error == null ? greyTextColor : primaryColor, fontSize: 14.0))]));
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}
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getHintText() {
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if (textFieldValue.length == 0 && error == null) {
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return ' ';
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} else if (error != null) {
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return error;
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} else {
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return getHint();
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}
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}
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/// Метод возвращает контейнер с установленными отступами, в котором размещен TextField обернутый в BoxDecoration.
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getDecoratedTextWidget() {
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return new Container(margin: new EdgeInsets.only(left: verticalMargin, right: verticalMargin),
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padding: getPaddingForTextWidget(),
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decoration: getDecoraionForTextWidget(),
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child: getTextWidget());
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}
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getPaddingForTextWidget() {
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const double verticalPadding = 12.0;
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const double horizontalPadding = 16.0;
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return new EdgeInsets.only(top: verticalPadding,
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bottom: verticalPadding,
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left: horizontalPadding,
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right: horizontalPadding);
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}
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/// Метод возвращает BoxDecoration для _getDecoratedInputField
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getDecoraionForTextWidget() {
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return new BoxDecoration(color: textFieldBackground,
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border: new Border.all(color: textBorderColor, width: 1.0,),
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borderRadius: new BorderRadius.all(new Radius.circular(4.0)));
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}
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Widget getTextWidget() {
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return new TextField(keyboardType: TextInputType.number,
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decoration: new InputDecoration.collapsed(hintText: getHint(),
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hintStyle: new TextStyle(color: greyTextColor, fontSize: 16.0)),
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onChanged: (text) => _handleUserInput(text));
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}
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/// Индикация ...
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Widget getProgressIndicator() {
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return new Center(child: loading ? new CircularProgressIndicator() : null);
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}
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} |