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Dynamically changing container background as child is revealed


Dynamically changing container background as child is revealed

By : user7454532
Date : November 18 2020, 03:01 PM
help you fix your problem I guess you can attach the slide change action to an event. Click on next/prev arrows for example. This way, your if statement will be checked.
If you have a lot of slides, you can get its background-color and apply this color to your container :
code :
var color = $(this).css("backgroundColor");
$('slider-container').css("backgroundColor", color);


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Can the container background image be inherited in a child container using CSS?

Can the container background image be inherited in a child container using CSS?


By : Allen Ghaida
Date : March 29 2020, 07:55 AM
it helps some times
I don't want to simply set the background of the div to the image as positioning of the image will be off.
Dynamically changing the background of ListView child

Dynamically changing the background of ListView child


By : ElBandu
Date : March 29 2020, 07:55 AM
I hope this helps . Find the nearest time save it in a variable and call adapter.notifyDataSetChanged()
code :
public View getView(int position, View convertView, ViewGroup parent){
  if(time is nerest time) {
    convertView. setBackgroundColor(Color. YELLOW)
  } else {
    convertView. setBackgroundColor("default color")
  }
} 
Container shadow disappear when the child container background color is filled

Container shadow disappear when the child container background color is filled


By : Leo Zacharias
Date : March 29 2020, 07:55 AM
With these it helps I'm trying to get a Material Card with custom shadow (that why I don't use the Card's elevation), It work fine when the color of the child controller is set to white, but the shadow disappear (become much weaker) when the child container is filled with darker color like brown. , It does not disappear, it's just a visual effect, you can try with:
code :
    BoxShadow(
                     color: Colors.black.withOpacity(0.50),
                     blurRadius: 18.0,
                      ),
 color: Colors.brown,
Flutter Container - How to align child text without changing container width?

Flutter Container - How to align child text without changing container width?


By : user3530251
Date : March 29 2020, 07:55 AM
help you fix your problem I am trying to build something similar to a chat bubble, where each chat bubble would have text aligned normally, and timestamp aligned to the bottom right of the bubble. The size of the bubble must expand with the text, and should not take more space than necessary. , This may help you
code :
import 'package:flutter/material.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: MainWidget(),
    );
  }
}

class MainWidget extends StatefulWidget {
  @override
  _MainWidgetState createState() => _MainWidgetState();
}

class _MainWidgetState extends State<MainWidget> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: ListView(
        shrinkWrap: true,
        children: <Widget>[
          ReceivedMessageBubble(
            message:
                "This is a demo message send by XXXX. So don't reply it. Trying to making it multiple lines. You can increase it",
            time: "12:45 PM",
          ),
          SendMessageBubble(
            message:
                "Oh!!! OK",
            time: "12:45 PM",
          ),
        ],
      ),
    );
  }
}

class SendMessageBubble extends StatelessWidget {
  final String message;
  final String time;

  const SendMessageBubble({
    Key key,
    this.message,
    this.time,
  })  : assert(message != null),
        assert(time != null),
        super(key: key);

  @override
  Widget build(BuildContext context) {
    return LayoutBuilder(
      builder: (context, constraints) {
        double maxBubbleWidth = constraints.maxWidth * 0.7;
        return Align(
          alignment: Alignment.centerRight,
          child: ConstrainedBox(
            constraints: BoxConstraints(maxWidth: maxBubbleWidth),
            child: Container(
              decoration: BoxDecoration(
                color: Colors.blue[300],
                borderRadius: const BorderRadius.only(
                  topLeft: Radius.circular(10.0),
                  topRight: Radius.circular(0.0),
                  bottomLeft: Radius.circular(10.0),
                  bottomRight: Radius.circular(10.0),
                ),
              ),
              margin: const EdgeInsets.all(10.0),
              padding: const EdgeInsets.all(10.0),
              child: IntrinsicWidth(
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.end,
                  children: <Widget>[
                    Text(message),
                    const SizedBox(height: 5.0),
                    Row(
                      mainAxisAlignment: MainAxisAlignment.start,
                      children: <Widget>[
                        Text(
                          time,
                          style: const TextStyle(
                            color: Colors.black54,
                            fontSize: 10.0,
                          ),
                        ),
                      ],
                    )
                  ],
                ),
              ),
            ),
          ),
        );
      },
    );
  }
}

class ReceivedMessageBubble extends StatelessWidget {
  final String message;
  final String time;

  const ReceivedMessageBubble({
    Key key,
    this.message,
    this.time,
  })  : assert(message != null),
        assert(time != null),
        super(key: key);

  @override
  Widget build(BuildContext context) {
    return LayoutBuilder(
      builder: (context, constraints) {
        double maxBubbleWidth = constraints.maxWidth * 0.7;
        return Align(
          alignment: Alignment.centerLeft,
          child: ConstrainedBox(
            constraints: BoxConstraints(
              maxWidth: maxBubbleWidth,
            ),
            child: Container(
              decoration: BoxDecoration(
                color: Colors.grey[300],
                borderRadius: const BorderRadius.only(
                  topLeft: Radius.circular(0.0),
                  topRight: Radius.circular(10.0),
                  bottomLeft: Radius.circular(10.0),
                  bottomRight: Radius.circular(10.0),
                ),
              ),
              margin: const EdgeInsets.all(10.0),
              padding: const EdgeInsets.all(10.0),
              child: IntrinsicWidth(
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: <Widget>[
                    Text(message,),
                    const SizedBox(height: 5.0),
                    Row(
                      mainAxisAlignment: MainAxisAlignment.end,
                      children: <Widget>[
                        Text(
                          time,
                          style: const TextStyle(
                            color: Colors.black54,
                            fontSize: 10.0,
                          ),
                        ),
                      ],
                    )
                  ],
                ),
              ),
            ),
          ),
        );
      },
    );
  }
}
CSS background color for child container extending till parent container

CSS background color for child container extending till parent container


By : Jack Lu
Date : March 29 2020, 07:55 AM
wish of those help Need background color for child container extending till width of view point. Properties needed should be applied to child container only. , You can set a wrapper to contain the desired color like this:
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