StickyHeaderDecoration | RecyclerView decoration to implement | RecyclerView library
kandi X-RAY | StickyHeaderDecoration Summary
kandi X-RAY | StickyHeaderDecoration Summary
ItemDecoration 有两个绘制时机：onDraw 和 onDrawOver，其中onDrawOver是在item绘制完成之后。 RecyclerView本身并没有提供可以固定某个item或者某个canvas的方法。 因此要实现粘性头部，只能通过假的视图来完成。. 现在 RecyclerView 的悬停头部 Decoration 网上可以找到不少实现，大多是直接画图，但如果我们需要绘制复杂头部的话，将不得不修改 decoration 本身的代码，且浪费大量的时间在调试 baseline 和 gravity 参数之类的工作中。我希望定义一个接口，抽象出这个 Header 的绘制，从而将 Decoration 的核心逻辑固定下来，方便解耦。. 考虑到 RecyclerView 的数据可能很多，因此 header 也可能不少，为了让 Header 也可以缓存和复用，我们需要类似于 view holder 的一种对象类型。由于 Decoration 是搭配 RecyclerView 使用，因此并不用担心引入额外依赖。所以，在 StickyHeaderAdapter 接口中直接使用了 ViewHolder 来作为这个中介类型。.
Support
Quality
Security
License
Reuse
Top functions reviewed by kandi - BETA
- Overridden method for background painting
- Computes the top - level top - top top - top - level view of a RecyclerView
- Get header from RecyclerView
- Returns true if the header with the specified position exists
- Gets the offsets of the items in the RecyclerView
- Decides if the item s header should be shown
- Invoked when the header view is created
- Create text view
- Creates and initializes the view
- This method is called when an item is selected
- Sets the content of the headerViewHolder at the given position
- Invalidate the header cache
StickyHeaderDecoration Key Features
StickyHeaderDecoration Examples and Code Snippets
Community Discussions
Trending Discussions on User Interface
QUESTION
script_a.py
...ANSWER
Answered 2022-Apr-18 at 02:03With many hours of testing, I did have success in running two Tk() loops, but it had potential to be problematic, as "Bryan Oakley" had posted in many threads about.
Ultimately, I decided when I was in need of running something alone, I'd start my GUI with arguments and process it in an entirely new process instead of passing any arguments directly. Seems like a safer option.
QUESTION
ANSWER
Answered 2021-Sep-30 at 06:06If you want to stick to using a Plain button, try entering a thin space (U+2009) character as the title, which won't consume much space and solves the issue. (Thanks to @El Tomato for suggesting white space characters)
Here it is for easier copy-pasting:
QUESTION
ANSWER
Answered 2022-Mar-14 at 19:06@override
Widget build(BuildContext context) {
return Scaffold(
floatingActionButton: FloatingActionButton(
onPressed: _writePost,
tooltip: 'Increment',
child: Icon(Icons.create, color: Colors.grey[300]),
),
body: SizedBox(
height: MediaQuery.of(context).height*0.8, // add this line
child:
// Container( // do not need this
// child: // and this do not need
// Column(children: [ // and this do not need
StreamBuilder>(
initialData: const [],
stream: _socketStream.stream,
builder: (context, snapshot) {
if (_isLoading) {
return const Center(
child: CircularProgressIndicator(),
);
}
ListView( // change this to ListView.builder for more performance
scrollDirection: Axis.vertical,
shrinkWrap: true,
children: [
...snapshot.data!.map(
(post) => Padding(
key: ValueKey(post.id),
padding: const EdgeInsets.symmetric(vertical: 10),
child: ListTile(
title: Text(
post.content,
style: const TextStyle(fontSize: 20),
),
trailing: MaterialButton(
onPressed: () {
_deletePost(post.id);
},
child: const Icon(
Icons.delete,
size: 30,
),
),
),
),
)
],
);## Heading ##
},
),
// ]) // comment this
// ). // and comment this
)
);
}
QUESTION
I am building a landing page that has a logo and then a sign in and login button below it. I used a box decoration to specify the background color because I am very particular about the gradient scheme. However, I realize it may have some kind of "absolute" effect on my container widget because I can't seem to change the colors of the buttons within the widget. I am new to flutter UI and I am probably layering the widgets incorrectly, but any help would be greatly appreciated! Here's the code for the landing page:
...ANSWER
Answered 2022-Mar-03 at 11:44Try this it will work. Change on pressed from null to this.....
QUESTION
On macOS Monetrey, when I move a child NSWindow to another screen (by manually dragging it), it disappears. Minimal repro using SwiftUI:
...ANSWER
Answered 2022-Feb-27 at 16:17I do believe you just want to add a second NSWindow, or a NSPanel. Without a child window relation. In AppKit document-based apps you would for example overwrite -[NSDocument makeWindowControllers] and setup multiple window controllers for one document.
Child windows are for special use cases, for example: functionality like autocompletions lists, where you would want a chrome-less window with a table view beneath a textfield, which automatically follows the parent window when moved.
Here is TextEdit with such a autocompletions window and the Xcode Debug View Hierarchy of the same:
See this note from the documentation:
After the childWin is added as a child of the window, it is maintained in relative position indicated by place for subsequent ordering operations involving either window. While this attachment is active, moving childWin will not cause the window to move (as in sliding a drawer in or out), but moving the window will cause childWin to move.
I don't believe that a child window was ever intended to be independently moved from its parent window, especially different screens.
QUESTION
What I want to do is to open a new Countrypage sub-window by clicking on the "New" button which is in Countrypage itself.
For example, if I click the "New" button in a CountryPage window (window title: "Country page"), one more new Countrypage window will be opened in the MDI area (window title: "Country Page 1"). Now if we click the "New" button in "Country Page 1", one more new window will open in the MDI area (window title: "Country page 2") and so on - and I want to close the windows one by one by pressing the corresponding "Close" button in Countrypage. New window are opened only by pressing a "New" button.
And if we close the last opened window by pressing the "Close" button, the text item in the "Country" text-box will be automatically updated in the previous window's "Country" text-box and so on.
Main Script :
...ANSWER
Answered 2022-Feb-14 at 18:38The adding and closing of sub-windows is best handled by the main-window. The CountryPage class doesn't need to know anything about the sub-windows. The new/close buttons can be directly connected to methods of the main-window. This makes it easier to manage the sub-windows via the functions of the mdi-area.
Below is a re-write of your example which should do what you asked for:
Main Script:
QUESTION
In angular,
This is script
...ANSWER
Answered 2021-Dec-30 at 01:04Some alternatives you can use:
QUESTION
I'm working on a cross-platform project in C++ generating the UI dynamically, and I am struggling with C++/winRT UWP NavigationView on two problems:
- When defining a NavigationViewItemHeader, the resulting header title doesn't show in the navigation menu, the space remains empty,
- When trying to update the SettingsItem of the navigation menu, the value of the Settings navigation item is nullptr as returned by SettingsItem().
Here is the code I wrote for generating the menu from a list of items managed independently from the host (e.g. Windows):
...ANSWER
Answered 2022-Feb-02 at 11:34Dynamic Headers/Footers enable different grouping options in reports, such as "By Location" or "By Location By System": Note that the words "Report Definitions" are circled above. Although reports can have up to three Dynamic Headers/Footers, some reports only have one or two Dynamic Groups.
QUESTION
While exploring TextField in a Jetpack Compose, I came across a case where I have to modify input typed in the field. For example, adding a comma after entering 3 characters.
This is how I made it.
...ANSWER
Answered 2021-Dec-18 at 11:45This kind of cases is exactly what VisualTransformation is intended for.
Here's a Googler's comment on another issue:
I don't think we can fix this issue easily.
The filtering text in onValueChanged callback is generally not recommended because the text state is shared with out process IME(software keyboard). The filtering text means the text content changes internally, then the new state is notified to IME. This is not a normal path to IME and different IME reacts differently to this unexpected state change. Some IME may try to reconstruct the composition, others may give up and start new session, etc. This is mostly due of the historical reason and hard to fix from now. So, please avoid filtering text in onValueChanged callback and consider following alternatives:
- (Recommended) Don't filter it and show error message. (irrelevant here)
- Use VisualTransformation for changing visual output without modifying edit buffer.
QUESTION
I am trying to model credit card data in JavaFx using a GridPane:
My model contains 3 rows (Note: each field is comprised of label + text field):
Row 1: First name and last name (4 fields)
Row 2: Credit card number (2 fields)
Row 3: Expiration date - month, year + CVV (6 fields)
See screenshot below:
I was reading this tutorial which states:
All cells in the same row will have the same height, and all cells in the same column will have the same width. Different rows can have different heights and different columns can have different widths.
Are there any workarounds to to have different size columns on a row by row basis in a GridPane?
ANSWER
Answered 2021-Nov-24 at 00:54For the specific layout in the image, I would use a VBox with HBox for rows:
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install StickyHeaderDecoration
You can use StickyHeaderDecoration like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the StickyHeaderDecoration component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .
Support
Reuse Trending Solutions
Find, review, and download reusable Libraries, Code Snippets, Cloud APIs from over 650 million Knowledge Items
Find more librariesStay Updated
Subscribe to our newsletter for trending solutions and developer bootcamps
Share this Page
