Scroll to Index of ListView in 100 Seconds + Example Application - #5 Flutter Web Tutorial Series By StudyIQ IAS

Summary by www.lecturesummary.com: Scroll to Index of ListView in 100 Seconds + Example Application - #5 Flutter Web Tutorial Series By StudyIQ IAS

Video Transcript Notes

Introduction to Messebau and Scrolling

• Messebau is a term used to describe the construction and design of trade show exhibits and displays. (00:12 - 00:44)

• Instead of traveling around, you want to be able to create specific text and design elements for your trade show booth. (00:12 - 00:44)

• The video discusses the use of a "scroll controller" to enable scrolling functionality within the trade show content. (00:23 - 00:44)

Indexing and Simplicity

• The video mentions the use of "indexfonds" or index funds to keep things simple. (00:52 - 01:04)

• There is discussion of "auto index" and "position bis ins ziel" which seem to relate to automated indexing and positioning of content. (01:08 - 01:29, 01:25 - 01:29)

Scrolling Functionality

• The video covers the implementation of a "scroll controller" to enable scrolling integration within the trade show content suite. (01:08 - 01:29)

• There is mention of "crawl controllers" and "method scrollt" which suggest the use of specific methods and controllers to handle the scrolling functionality. (01:08 - 01:29)

Content and Design Elements

• The video discusses the use of "pages indes" and "mobile uk power" which seem to relate to the design and layout of the trade show content. (02:17 - 02:31, 02:33 - 02:39)

• There is also mention of "creative writing scroll controller" and "indische leistet" which suggest the incorporation of written content and design elements. (02:48 - 03:04)

Scrolling Integration

• The video covers the integration of scrolling functionality into the "ITV elements" of the trade show content. (03:18 - 03:31)

• There is discussion of "pacific index gold" and "items crawl control" which seem to be specific features or elements related to the scrolling integration. (03:29 - 03:45)

Optimization and Refinement

• The video mentions "relaxing alles prima board index" and "köln bietet elemente" which suggest the optimization and refinement of the trade show content and design. (03:41 - 03:57)

• There is also discussion of "second source of the decade of pop madonna" and "press tonnen ist ein" which may relate to the incorporation of additional content or design elements. (03:54 - 04:07)

Conclusion and Reloading

• The video concludes with a discussion of reloading the page to ensure the "specific position" of the trade show content is maintained. (04:10 - 04:29)

• There is a final mention of "[Musik]" which may indicate the end of the video or a musical cue. (04:31 - 04:34)

DeepLearn by www.lecturesummary.com: Scroll to Index of ListView in 100 Seconds + Example Application - #5 Flutter Web Tutorial Series By StudyIQ IAS

Scrolling to a Specific Index in a ListView

(00:00:00 - 00:00:13)In this example, we'll learn how to scroll to a specific index in a ListView. We'll create a simple app with a ListView of center text widgets, and then we'll use the ScrollPositionedList

package to scroll to a specific item.

Key Points:

• We'll use the ListView.builder()

  method to create the ListView

• We'll add the ScrollPositionedList

  package to our project

• We'll create an ItemScrollController

  and use it to scroll to a specific item in the ListView

(00:00:13 - 00:00:28)Scrolling to a Specific Index

• Instead of randomly scrolling around, we want to be able to scroll to a specific text widget

• To achieve this, we'll use the ScrollPositionedList

  package

• We'll add the package to our pubspec.yaml

  file and run pub get

(00:00:28 - 00:00:44)Implementing the ScrollPositionedList

• In our ListView, we'll change it to be a ScrollPositionedList

• We'll create an ItemScrollController

  and add it to the ScrollPositionedList

(00:00:44 - 00:00:57)Demonstrating the Functionality

• Now that we have the ItemScrollController

  set up, we can use it to scroll to a specific item in the ListView

• This will allow us to programmatically scroll to a specific index in the list, rather than just randomly scrolling around

Notes:

• The ScrollPositionedList

  package provides a way to easily scroll to a specific index in a ListView

• By creating an ItemScrollController

  and adding it to the ScrollPositionedList

  , we can control the scrolling behavior and scroll to a specific item

• This can be useful in scenarios where you need to programmatically navigate to a specific item in a long list, such as in a settings menu or a search result list

Adding an App Bar with Scroll Controller

(00:00:57 - 00:01:10)In this section, we'll add an app bar with an icon button to our app. This will keep the implementation simple.

Key Points:

• We want to scroll to index 4 in the onPress

  method.

(00:01:10 - 00:01:27)To achieve this, we'll use the itemScrollController

method to define the scroll index and duration.

Steps:

1. Use the itemScrollController

   method.

2. Call the scrollTo

   method to define the index and duration.

3. The scroll animation will take the specified duration to complete.

4. After a hot reload, we can now jump to index 4 from any position within our ListView

   .

(00:01:27 - 00:01:40)Another neat feature of the itemScrollController

is that it allows us to set an initial scroll index to be shown.

Potential Use Case:

• This can be useful if you want to allow the user to return to previously saved scroll positions.

(00:01:40 - 00:01:50)Let's explore a more practical and realistic example to demonstrate this feature.

"A neat little tip for you to know is that our item scroll controller also allows to set an initial scroll index to be shown which might come in handy if you wanted."

Developer Portfolio - Mobile View

(00:01:50 - 00:02:09)This section discusses the mobile view of the developer's portfolio. The key points are:

Mobile Layout

• Vertical layout with a hamburger menu

• Hamburger menu opens a drawer with different views

Functionality

• Ability to click on a tab and jump to its scrolling position

• No "About" and "Projects" pages implemented yet

Placeholder Content

• Added placeholder content to verify the list view functionality

• The different pages are stored in a "content views" list

(00:02:09 - 00:02:28)This section discusses the implementation of the list view and placeholder content.

List View

• The different pages are stored in a "content views" list

• This allows easy access to each element individually

Mobile View Implementation

• The current mobile view implementation is similar to the example from the beginning

(00:02:28 - 00:02:40)This section discusses the current mobile view implementation.

Mobile View

• The mobile view is pretty similar to the example from the beginning

• Scrolling down to the mobile view shows the current implementation

Notes

Mobile Layout

• Vertical Layout: The portfolio has a vertical layout for the mobile view.

• Hamburger Menu: The mobile view includes a hamburger menu that opens a drawer with different views.

Functionality

• Tab Navigation: The ability to click on a tab and jump to its scrolling position is not yet implemented.

• Missing Pages: The "About" and "Projects" pages are not yet implemented.

Placeholder Content

• Content Views List: The different pages are stored in a "content views" list, allowing easy access to each element individually.

• Verifying List View: Placeholder content was added to verify the functionality of the list view.

Mobile View Implementation

• Similarity to Example: The current mobile view implementation is pretty similar to the example shown earlier.

• Scrolling to Mobile View: Scrolling down to the mobile view shows the current implementation.

Adding Scroll Positioned List Package

Description

In this section, we will learn how to add the scroll positioned list package to our Flutter project and use it to create a scrollable list view.

Key Points:

• Add the scroll positioned list package to the pubspec.yaml file

• Run pub get

  to install the package

• Change the list view to a scroll positioned list

• Create an item scroll controller and initialize it in the initState method

• Add the item scroll controller to the scroll positioned list

(00:03:03 - 00:03:20)

Scrolling to a Specific Index

Description

We will learn how to scroll to a specific index in the list view using the item scroll controller.

Key Points:

• Call the scrollTo

  method of the item scroll controller to scroll to a specific index

• This method is typically called when a tab in the drawer is tapped

(00:03:20 - 00:03:30)

Implementing the Drawer

Description

In this section, we will implement the drawer widget and create a list tile for each element in the content view list.

Key Points:

• Create a list tile for each element in the content view list

• In the onTap

  method of the list tile, call the scrollTo

  method of the item scroll controller to scroll to the corresponding index

(00:03:30 - 00:03:41)

Accessing and Manipulating List Elements

(00:03:41 - 00:03:59)In this section, we learn how to access the currently selected element in a list and perform actions on it. Specifically, we:

• Access the list from the previous section

• Get the index of the currently selected element

• Set the duration of the animation to 300 milliseconds

• Call the Navigator.pop()

  method on the current context to close the drawer

Key Points:

• Accessing the list from previous section

• Getting the index of the currently selected element

• Setting the animation duration to 300 milliseconds

• Calling Navigator.pop()

  to close the drawer

(00:03:59 - 00:04:14)To close the drawer after pressing on a list tile, we need to reload the page. This ensures that the drawer is properly closed and the user is returned to the main view.

Steps:

1. Press on a list tile

2. Reload the page to close the drawer

(00:04:14 - 00:04:31)In this final section, we see how we can scroll to a specific position in our list view. This is a useful feature that allows users to quickly navigate to a desired item in a long list.

Scrolling to a Specific Position:

• We are now able to scroll to a specific position in our list view

• This makes it easier for users to navigate long lists and find the desired item

(00:04:31 - 00:04:36)In conclusion, the video has covered several important topics related to working with lists in our application. We've learned how to access and manipulate list elements, close the drawer, and scroll to specific positions in the list view.

Key Takeaways:

• Accessing and manipulating list elements

• Closing the drawer by reloading the page

• Scrolling to a specific position in the list view