Ellis Herbert

Ellis Herbert

1598291460

A widget that can be dragged and scrolled with flutter

Sliding Sheet

A widget that can be dragged and scrolled in a single gesture and snapped to a list of extents.

Example of a SlidingSheet

Click here to view the full example.

Installing

Add it to your pubspec.yaml file:

dependencies:
  sliding_sheet: ^0.3.7

Install packages from the command line

flutter packages get

If you like this package, consider supporting it by giving it a star on GitHub and a like on pub.dev ❤️

Usage

There are two ways in which you can use a SlidingSheet: either as a permanent (or persistent) Widget in your widget tree or as a BottomSheetDialog.

As a Widget

This method can be used to show the SlidingSheet permanently (usually above your other widget) as shown in the example.

@override
Widget build(BuildContext context) {
  return Scaffold(
    backgroundColor: Colors.grey.shade200,
    appBar: AppBar(
      title: Text('Simple Example'),
    ),
    body: SlidingSheet(
      elevation: 8,
      cornerRadius: 16,
      snapSpec: const SnapSpec(
        // Enable snapping. This is true by default.
        snap: true,
        // Set custom snapping points.
        snappings: [0.4, 0.7, 1.0],
        // Define to what the snappings relate to. In this case, 
        // the total available space that the sheet can expand to.
        positioning: SnapPositioning.relativeToAvailableSpace,
      ),
      // The body widget will be displayed under the SlidingSheet
      // and a parallax effect can be applied to it.
      body: Center(
        child: Text('This widget is below the SlidingSheet'),
      ),
      builder: (context, state) {
        // This is the content of the sheet that will get
        // scrolled, if the content is bigger than the available
        // height of the sheet.
        return Container(
          height: 500,
          child: Center(
            child: Text('This is the content of the sheet'),
          ),
        );
      },
    ),
  );
}
Result:

Example

As a BottomSheetDialog

This method can be used to show a SlidingSheet as a BottomSheetDialog by calling the showSlidingBottomSheet function and returning and instance of SlidingSheetDialog.

void showAsBottomSheet() async {
  final result = await showSlidingBottomSheet(
    context,
    builder: (context) {
      return SlidingSheetDialog(
        elevation: 8,
        cornerRadius: 16,
        snapSpec: const SnapSpec(
          snap: true,
          snappings: [0.4, 0.7, 1.0],
          positioning: SnapPositioning.relativeToAvailableSpace,
        ),
        builder: (context, state) {
          return Container(
            height: 400,
            child: Center(
              child: Material(
                child: InkWell(
                  onTap: () => Navigator.pop(context, 'This is the result.'),
                  child: Padding(
                    padding: const EdgeInsets.all(16),
                    child: Text(
                      'This is the content of the sheet',
                      style: Theme.of(context).textTheme.body1,
                    ),
                  ),
                ),
              ),
            ),
          );
        },
      );
    }
  );

  print(result); // This is the result.
}
Result:

Example

Snapping

A SlidingSheet can snap to multiple extents or to no at all. You can customize the snapping behavior by passing an instance of SnapSpec to the SlidingSheet.

Parameter Description
snap If true, the SlidingSheet will snap to the provided snappings. If false, the SlidingSheet will slide from minExtent to maxExtent and then begin to scroll, if the content is bigger than the available height.
snappings The extents that the SlidingSheet will snap to, when the user ends a drag interaction. The minimum and maximum values will represent the bounds in which the SlidingSheet will slide until it reaches the maximum from which on it will scroll.
positioning Can be set to one of these three values: SnapPositioning.relativeToAvailableSpace - Positions the snaps relative to total available height that the SlidingSheet can expand to. All values must be between 0 and 1. E.g. a snap of 0.5 in a Scaffold without an AppBar would mean that the snap would be positioned at 40% of the screen height, irrespective of the height of the SlidingSheet. SnapPositioning.relativeToSheetHeight - Positions the snaps relative to the total height of the sheet. All values must be between 0 and 1. E.g. a snap of 0.5 and a total sheet size of 300 pixels would mean the snap would be positioned at a 150 pixel offset from the bottom. SnapPositioning.pixelOffset - Positions the snaps at a fixed pixel offset. double.infinity can be used to refer to the total available space without having to compute it yourself.
onSnap A callback function that gets invoked when the SlidingSheet snaps to an extent.

SnapPositioning.relativeToAvailableSpace with a snap of 0.5 SnapPositioning.relativeToSheetHeight with a snap of 0.5 SnapPositioning.pixelOffset with a snap of 100

There are also some prebuild snaps you can facilitate to snap for example to headers or footers as shown in the example.

Snap Description
SnapSpec.headerFooterSnap The snap extent that makes header and footer fully visible without account for vertical padding on the SlidingSheet.
SnapSpec.headerSnap The snap extent that makes the header fully visible without account for top padding on the SlidingSheet.
SnapSpec.footerSnap The snap extent that makes the footer fully visible without account for bottom padding on the SlidingSheet.
SnapSpec.expanded The snap extent that expands the whole SlidingSheet.

SheetController

The SheetController can be used to change the state of a SlidingSheet manually, simply passing an instance of SheetController to a SlidingSheet. Note that the methods can only be used after the SlidingSheet has been rendered, however calling them before wont throw an exception.

Note that you can also use the static SheetController.of(context) method to obtain an instance of the SheetController of the closest SlidingSheet. This also works if you didn’t assign a SheetController explicitly on the SlidingSheet.

Method Description
expand() Expands the SlidingSheet to the maximum extent.
collapse() Collapses the SlidingSheet to the minimum extent.
snapToExtent() Snaps the SlidingSheet to an arbitrary extent. The extent will be clamped to the minimum and maximum extent. If the scroll offset is > 0, the SlidingSheet will first scroll to the top and then slide to the extent.
scrollTo() Scrolls the SlidingSheet to the given offset. If the SlidingSheet is not yet at its maximum extent, it will first snap to the maximum extent and then scroll to the given offset.
rebuild() Calls all builders of the SlidingSheet to rebuild their children. This method can be used to reflect changes in the SlidingSheets children without calling setState(() {}); on the parent widget to improve performance.
show() Visually shows the SlidingSheet if it was previously hidden. Note that calling this method wont have an effect for SlidingSheetDialogs.
hide() Visually hides the SlidingSheet until you call show() again. Note that calling this method wont have an effect for SlidingSheetDialogs.

Headers and Footers

Headers and footers are UI elements of a SlidingSheet that will be displayed at the top or bottom of a SlidingSheet respectively and will not get scrolled. The scrollable content will then live in between the header and the footer if specified. Delegating the touch events to the SlidingSheet is done for you. Example:

@override
Widget build(BuildContext context) {
  return Scaffold(
    backgroundColor: Colors.grey.shade200,
    appBar: AppBar(
      title: Text('Simple Example'),
    ),
    body: Stack(
      children: <Widget>[
        SlidingSheet(
          elevation: 8,
          cornerRadius: 16,
          snapSpec: const SnapSpec(
            snap: true,
            snappings: [112, 400, double.infinity],
            positioning: SnapPositioning.pixelOffset,
          ),
          builder: (context, state) {
            return Container(
              height: 500,
              child: Center(
                child: Text(
                  'This is the content of the sheet',
                  style: Theme.of(context).textTheme.body1,
                ),
              ),
            );
          },
          headerBuilder: (context, state) {
            return Container(
              height: 56,
              width: double.infinity,
              color: Colors.green,
              alignment: Alignment.center,
              child: Text(
                'This is the header',
                style: Theme.of(context).textTheme.body1.copyWith(color: Colors.white),
              ),
            );
          },
          footerBuilder: (context, state) {
            return Container(
              height: 56,
              width: double.infinity,
              color: Colors.yellow,
              alignment: Alignment.center,
              child: Text(
                'This is the footer',
                style: Theme.of(context).textTheme.body1.copyWith(color: Colors.black),
              ),
            );
          },
        ),
      ],
    ),
  );
}
Result:

Simple header/footer example

ListViews and Columns

The children of a SlidingSheet are not allowed to have an inifinite (unbounded) height. Therefore when using a ListView, make sure to set shrinkWrap to true and physics to NeverScrollableScrollPhysics. Similarly when using a Column as a child of a SlidingSheet, make sure to set the mainAxisSize to MainAxisSize.min.

Reflecting changes

To improve performace, the children of a SlidingSheet are not rebuild when it slides or gets scrolled. You can however pass a callback function to the listener parameter of a SlidingSheet, that gets called with the current SheetState whenever the SlidingSheet slides or gets scrolled. You can then rebuild your UI by calling setState(() {}), (instance of SheetController).rebuild() or by a different state management solution to rebuild the sheet. When using the SlidingSheet as a bottomSheetDialog you can also use (instance of SheetController).rebuild() to rebuild the sheet.

The example for instance decreases the corner radius of the SlidingSheet as it gets dragged to the top and increases the headers top padding by the status bar height. Because this is a common behavior among Material Bottom Sheets, SlidingSheet supports this out of the box, which can be achieved by setting the addTopViewPaddingOnFullscreen parameter to true and the cornerRadiusOnFullscreen to 0.

Example on how to reflect changes in the SlidingSheet

Download Details:

Author: bnxm

Source Code: https://github.com/bnxm/sliding_sheet

#flutter #dart #mobile-apps

What is GEEK

Buddha Community

A widget that can be dragged and scrolled with flutter

Google's Flutter 1.20 stable announced with new features - Navoki

Flutter Google cross-platform UI framework has released a new version 1.20 stable.

Flutter is Google’s UI framework to make apps for Android, iOS, Web, Windows, Mac, Linux, and Fuchsia OS. Since the last 2 years, the flutter Framework has already achieved popularity among mobile developers to develop Android and iOS apps. In the last few releases, Flutter also added the support of making web applications and desktop applications.

Last month they introduced the support of the Linux desktop app that can be distributed through Canonical Snap Store(Snapcraft), this enables the developers to publish there Linux desktop app for their users and publish on Snap Store.  If you want to learn how to Publish Flutter Desktop app in Snap Store that here is the tutorial.

Flutter 1.20 Framework is built on Google’s made Dart programming language that is a cross-platform language providing native performance, new UI widgets, and other more features for the developer usage.

Here are the few key points of this release:

Performance improvements for Flutter and Dart

In this release, they have got multiple performance improvements in the Dart language itself. A new improvement is to reduce the app size in the release versions of the app. Another performance improvement is to reduce junk in the display of app animation by using the warm-up phase.

sksl_warm-up

If your app is junk information during the first run then the Skia Shading Language shader provides for pre-compilation as part of your app’s build. This can speed it up by more than 2x.

Added a better support of mouse cursors for web and desktop flutter app,. Now many widgets will show cursor on top of them or you can specify the type of supported cursor you want.

Autofill for mobile text fields

Autofill was already supported in native applications now its been added to the Flutter SDK. Now prefilled information stored by your OS can be used for autofill in the application. This feature will be available soon on the flutter web.

flutter_autofill

A new widget for interaction

InteractiveViewer is a new widget design for common interactions in your app like pan, zoom drag and drop for resizing the widget. Informations on this you can check more on this API documentation where you can try this widget on the DartPad. In this release, drag-drop has more features added like you can know precisely where the drop happened and get the position.

Updated Material Slider, RangeSlider, TimePicker, and DatePicker

In this new release, there are many pre-existing widgets that were updated to match the latest material guidelines, these updates include better interaction with Slider and RangeSliderDatePicker with support for date range and time picker with the new style.

flutter_DatePicker

New pubspec.yaml format

Other than these widget updates there is some update within the project also like in pubspec.yaml file format. If you are a flutter plugin publisher then your old pubspec.yaml  is no longer supported to publish a plugin as the older format does not specify for which platform plugin you are making. All existing plugin will continue to work with flutter apps but you should make a plugin update as soon as possible.

Preview of embedded Dart DevTools in Visual Studio Code

Visual Studio code flutter extension got an update in this release. You get a preview of new features where you can analyze that Dev tools in your coding workspace. Enable this feature in your vs code by _dart.previewEmbeddedDevTools_setting. Dart DevTools menu you can choose your favorite page embed on your code workspace.

Network tracking

The updated the Dev tools comes with the network page that enables network profiling. You can track the timings and other information like status and content type of your** network calls** within your app. You can also monitor gRPC traffic.

Generate type-safe platform channels for platform interop

Pigeon is a command-line tool that will generate types of safe platform channels without adding additional dependencies. With this instead of manually matching method strings on platform channel and serializing arguments, you can invoke native class and pass nonprimitive data objects by directly calling the Dartmethod.

There is still a long list of updates in the new version of Flutter 1.2 that we cannot cover in this blog. You can get more details you can visit the official site to know more. Also, you can subscribe to the Navoki newsletter to get updates on these features and upcoming new updates and lessons. In upcoming new versions, we might see more new features and improvements.

You can get more free Flutter tutorials you can follow these courses:

#dart #developers #flutter #app developed #dart devtools in visual studio code #firebase local emulator suite in flutter #flutter autofill #flutter date picker #flutter desktop linux app build and publish on snapcraft store #flutter pigeon #flutter range slider #flutter slider #flutter time picker #flutter tutorial #flutter widget #google flutter #linux #navoki #pubspec format #setup flutter desktop on windows

Terry  Tremblay

Terry Tremblay

1598396940

What is Flutter and why you should learn it?

Flutter is an open-source UI toolkit for mobile developers, so they can use it to build native-looking** Android and iOS** applications from the same code base for both platforms. Flutter is also working to make Flutter apps for Web, PWA (progressive Web-App) and Desktop platform (Windows,macOS,Linux).

flutter-mobile-desktop-web-embedded_min

Flutter was officially released in December 2018. Since then, it has gone a much stronger flutter community.

There has been much increase in flutter developers, flutter packages, youtube tutorials, blogs, flutter examples apps, official and private events, and more. Flutter is now on top software repos based and trending on GitHub.

Flutter meaning?

What is Flutter? this question comes to many new developer’s mind.

humming_bird_dart_flutter

Flutter means flying wings quickly, and lightly but obviously, this doesn’t apply in our SDK.

So Flutter was one of the companies that were acquired by **Google **for around $40 million. That company was based on providing gesture detection and recognition from a standard webcam. But later when the Flutter was going to release in alpha version for developer it’s name was Sky, but since Google already owned Flutter name, so they rename it to Flutter.

Where Flutter is used?

Flutter is used in many startup companies nowadays, and even some MNCs are also adopting Flutter as a mobile development framework. Many top famous companies are using their apps in Flutter. Some of them here are

Dream11

Dream11

NuBank

NuBank

Reflectly app

Reflectly app

Abbey Road Studios

Abbey Road Studios

and many more other apps. Mobile development companies also adopted Flutter as a service for their clients. Even I was one of them who developed flutter apps as a freelancer and later as an IT company for mobile apps.

Flutter as a service

#dart #flutter #uncategorized #flutter framework #flutter jobs #flutter language #flutter meaning #flutter meaning in hindi #google flutter #how does flutter work #what is flutter

Punith Raaj

1644991598

The Ultimate Guide To Tik Tok Clone App With Firebase - Ep 2

The Ultimate Guide To Tik Tok Clone App With Firebase - Ep 2
In this video, I'm going to show you how to make a Cool Tik Tok App a new Instagram using Flutter,firebase and visual studio code.

In this tutorial, you will learn how to Upload a Profile Pic to Firestore Data Storage.

🚀 Nice, clean and modern TikTok Clone #App #UI made in #Flutter⚠️

Starter Project : https://github.com/Punithraaj/Flutter_Tik_Tok_Clone_App/tree/Episode1

► Timestamps 
0:00 Intro 0:20 
Upload Profile Screen 
16:35 Image Picker
20:06 Image Cropper 
24:25 Firestore Data Storage Configuration.

⚠️ IMPORTANT: If you want to learn, I strongly advise you to watch the video at a slow speed and try to follow the code and understand what is done, without having to copy the code, and then download it from GitHub.

► Social Media 
GitHub: https://github.com/Punithraaj/Flutter_Tik_Tok_Clone_App.git
LinkedIn: https://www.linkedin.com/in/roaring-r...
Twitter: https://twitter.com/roaringraaj
Facebook: https://www.facebook.com/flutterdartacademy

► Previous Episode : https://youtu.be/QnL3fr-XpC4
► Playlist: https://youtube.com/playlist?list=PL6vcAuTKAaYe_9KQRsxTsFFSx78g1OluK

I hope you liked it, and don't forget to like,comment, subscribe, share this video with your friends, and star the repository on GitHub!
⭐️ Thanks for watching the video and for more updates don't forget to click on the notification. 
⭐️Please comment your suggestion for my improvement. 
⭐️Remember to like, subscribe, share this video, and star the repo on Github :)

Hope you enjoyed this video!
If you loved it, you can Buy me a coffee : https://www.buymeacoffee.com/roaringraaj

LIKE & SHARE & ACTIVATE THE BELL Thanks For Watching :-)
 
https://youtu.be/F_GgZVD4sDk

#flutter tutorial - tiktok clone with firebase #flutter challenge @tiktokclone #fluttertutorial firebase #flutter firebase #flutter pageview #morioh #flutter

Punith Raaj

1640672627

Flutter Hotel Booking UI - Book your Stay At A New Hotel With Flutter - Ep1

https://youtu.be/-tHUmjIkGJ4
Flutter Hotel Booking UI - Book your Stay At A New Hotel With Flutter - Ep1
#flutter #fluttertravelapp #hotelbookingui #flutter ui design 

In this video, I'm going to show you how to make a Cool Hotel Booking App using Flutter and visual studio code. 

In this tutorial, you will learn how to create a Splash Screen and Introduction Screen, how to implement a SmoothPageIndicator in Flutter. 

🚀 Nice, clean and modern Hotel Booking #App #UI made in #Flutter 

⚠️ IMPORTANT: If you want to learn, I strongly advise you to watch the video at a slow speed and try to follow the code and understand what is done, without having to copy the code, and then download it from GitHub. 

► Social Media 

    GitHub: https://github.com/Punithraaj 

    LinkedIn: https://www.linkedin.com/in/roaring-r...

    Twitter: https://twitter.com/roaringraaj

    Facebook: https://www.facebook.com/flutterdartacademy

I hope you liked it, and don't forget to like,comment, subscribe, share this video with your friends, and star the repository on GitHub! 

⭐️ Thanks for watching the video and for more updates don't forget to click on the notification.⭐️Please comment your suggestion for my improvement. ⭐️Remember to like, subscribe, share this video, and star the repo on Github :)Hope you enjoyed this video! If you loved it, you can Buy me a coffee : https://www.buymeacoffee.com/roaringraaj

#flutter riverpod #flutter travel app #appointment app flutter #morioh

Adobe XD plugin for Flutter with CodePen Tutorial

Recently Adobe XD releases a new version of the plugin that you can use to export designs directly into flutter widgets or screens. Yes, you read it right, now you can make and export your favorite design in Adobe XD and export all the design in the widget form or as a full-screen design, this can save you a lot of time required in designing.

What we will do?
I will make a simple design of a dialogue box with a card design with text over it as shown below. After you complete this exercise you can experiment with the UI. You can make your own components or import UI kits available with the Adobe XD.

#developers #flutter #adobe xd design export to flutter #adobe xd flutter code #adobe xd flutter code generator - plugin #adobe xd flutter plugin #adobe xd flutter plugin tutorial #adobe xd plugins #adobe xd to flutter #adobe xd tutorial #codepen for flutter.