LayoutManagerGroup | Customize the LayoutManager of RecyclerView | RecyclerView library

by DingMouRen Java Version: Current License: No License

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kandi X-RAY | LayoutManagerGroup Summary

LayoutManagerGroup is a Java library typically used in User Interface, RecyclerView applications. LayoutManagerGroup has no vulnerabilities, it has build file available and it has medium support. However LayoutManagerGroup has 9 bugs. You can download it from GitHub.

:point_right: Customize the LayoutManager of RecyclerView(自定义LayoutManager)

Support

Quality

Security

License

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kandi-support Support

LayoutManagerGroup has a medium active ecosystem.
It has 4693 star(s) with 661 fork(s). There are 89 watchers for this library.
It had no major release in the last 12 months.
There are 41 open issues and 17 have been closed. On average issues are closed in 3 days. There are no pull requests.
It has a neutral sentiment in the developer community.
The latest version of LayoutManagerGroup is current.

LayoutManagerGroup Support

Best in #RecyclerView

Average in #RecyclerView

LayoutManagerGroup Support

Best in #RecyclerView

Average in #RecyclerView

quality kandi Quality

LayoutManagerGroup has 9 bugs (0 blocker, 0 critical, 0 major, 9 minor) and 186 code smells.

LayoutManagerGroup Quality

Best in #RecyclerView

Average in #RecyclerView

LayoutManagerGroup Quality

Best in #RecyclerView

Average in #RecyclerView

security Security

LayoutManagerGroup has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
LayoutManagerGroup code analysis shows 0 unresolved vulnerabilities.
There are 0 security hotspots that need review.

LayoutManagerGroup Security

Best in #RecyclerView

Average in #RecyclerView

LayoutManagerGroup Security

Best in #RecyclerView

Average in #RecyclerView

license License

LayoutManagerGroup does not have a standard license declared.
Check the repository for any license declaration and review the terms closely.
Without a license, all rights are reserved, and you cannot use the library in your applications.

LayoutManagerGroup License

Best in #RecyclerView

Average in #RecyclerView

LayoutManagerGroup License

Best in #RecyclerView

Average in #RecyclerView

build Reuse

LayoutManagerGroup releases are not available. You will need to build from source code and install.
Build file is available. You can build the component from source.
Installation instructions are not available. Examples and code snippets are available.
LayoutManagerGroup saves you 1569 person hours of effort in developing the same functionality from scratch.
It has 3491 lines of code, 203 functions and 66 files.
It has medium code complexity. Code complexity directly impacts maintainability of the code.

LayoutManagerGroup Reuse

Best in #RecyclerView

Average in #RecyclerView

LayoutManagerGroup Reuse

Best in #RecyclerView

Average in #RecyclerView

Top functions reviewed by kandi - BETA

kandi has reviewed LayoutManagerGroup and discovered the below as its top functions. This is intended to give you an instant insight into LayoutManagerGroup implemented functionality, and help decide if they suit your requirements.

initialize
Fills the view with the bottom sheet .
Figure out the child .
Play a video
helper method to override onChildDraw method
Initialize the listener which will be notified when the view is dragged .
Calculate a measure
Called when a menu item is selected .
Initializes the view .
Handle the scroll state change .

LayoutManagerGroup Key Features

:point_right: Customize the LayoutManager of RecyclerView(自定义LayoutManager)

LayoutManagerGroup Examples and Code Snippets

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	allprojects{

		repositories {
			...
			maven { url 'https://jitpack.io' }
		}
	}

License

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Copyright (C) 2018 DingMouRen

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License

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Community Discussions

Trending Discussions on User Interface

Correct way to run two Tk() mainloops independently, with second being started from first script?
Xcode 13 - "Button" title not disappearing
ListView doesn't separate objects from doc
Change color of child button element regardless of box decoration background color
Stop child NSWindow disappearing when moved to another screen
How to open a new MDI sub-window in PyQt5?
TS7006: Parameter 'event' implicitly has an 'any' type
How to dynamically define Headers and Settings for UWP NavigationView's menu, using C++/winRT?
Android Jetpack Compose: Keyboard changing from numeric to alphabets after modifying input text
Achieve Unique Column Width for each Cell in Different Rows with a GridPane?

Trending Discussions on User Interface

QUESTION

Correct way to run two Tk() mainloops independently, with second being started from first script?

Asked 2022-Apr-18 at 02:03

script_a.py

from tkinter import *
from script_b import test

root = Tk()

var1 = stuff
var2 = stuff

def start_scriptb():
    test([var1, var2])

Button(root, text="Start", 
command=start_scriptb)


root.mainloop()

script_b.py

from tkinter import *


def test(x):
    main = Tk()
    Label(main, text=x)
    Button(main, text="Exit", command=main.destroy())

    main.mainloop()

This is a very basic version of what I'm trying to achieve. I actually am spawning a progress window that uses subprocess.Popen in script 2 with the passed through variables from script one and viewing the progess through a scrolled text widget on the 2nd program. I'm trying to spawn a new process, independent from the root GUI each time that button is hit from script_a.

It works fine in my tests so far, but I wanted to see if this could cause any issues or if this is actually spawning two processes?

I know there should only be one Tk() per process.

Using a TopLevel() window to show the progress works fine with the threading module, but the TopLevel() window will freeze as well as root (and any other open TopLevels()) if root is doing any sort of processing that takes any length of time.

ANSWER

Answered 2022-Apr-18 at 02:03

With 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.

Source https://stackoverflow.com/questions/71880097

QUESTION

ListView doesn't separate objects from doc

Asked 2022-Mar-29 at 03:21

[RESOLVED]

Both answers under question are right. There is a final redaction below in post.

I'm trying to create scrollable list of posts, but instead I got static non-scrollable block of strings, which is overflowing.

Example:

Overflowing:

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        floatingActionButton: FloatingActionButton(
          onPressed: _writePost,
          tooltip: 'Increment',
          child: Icon(Icons.create, color: Colors.grey[300]),
        ),
        body: SizedBox(
            child: Container(
                child: Column(children: [
          StreamBuilder<List<Post>>(
            initialData: const [],
            stream: _socketStream.stream,
            builder: (context, snapshot) {
              if (_isLoading) {
                return const Center(
                  child: CircularProgressIndicator(),
                );
              }
               ListView(
                scrollDirection: Axis.vertical,
                shrinkWrap: true,
                children: [
                  ...snapshot.data!.map<Widget>(
                    (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,
                          ),
                        ),
                      ),
                    ),
                  )
                ],
              );
            },
          ),
        ]))));
  }

Edited code, which is scrolling

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        floatingActionButton: FloatingActionButton(
          onPressed: _writePost,
          tooltip: 'Increment',
          child: Icon(Icons.create, color: Colors.grey[300]),
        ),
        body: SizedBox(
          height: 500, 
          child:
              StreamBuilder<List<Post>>(
            initialData: const [],
            stream: _socketStream.stream,
            builder: (context, snapshot) {
              if (_isLoading) {
                return const Center(
                  child: CircularProgressIndicator(),
                );
              }
              return Card(child: ListView(
                scrollDirection: Axis.vertical,
                shrinkWrap: true,
                children: [
                  ...snapshot.data!.map<Widget>(
                    (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,
                          ),
                        ),
                      ),
                    ),
                  )
                ],
               ) );
            },
          ),
        ));
  }

I've tried to find error with documentation, but...
Please write if you need some more code or explanations.

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<List<Post>>(
            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<Widget>(
                    (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
     )
   );
  }

Source https://stackoverflow.com/questions/71472464

QUESTION

Change color of child button element regardless of box decoration background color

Asked 2022-Mar-03 at 11:56

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:

import 'package:flutter/material.dart';
import 'package:zefyr/common_widgets/cutom_elevated_button.dart';

class LandingPage extends StatelessWidget {
  const LandingPage({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Container(
      decoration: const BoxDecoration(
         gradient : LinearGradient(
             begin: Alignment(0.1705881804227829,-0.7394942045211792),
             end: Alignment(0.7395344376564026,0.7999715805053711),
             colors: [Color.fromRGBO(212, 7, 248, 1),Color.fromRGBO(141, 6, 248, 1)]
         ),
        image: DecorationImage(
          image: AssetImage('assets/images/zefyr_logo.png'),
        ),
       ),
      child: Column(
          crossAxisAlignment: CrossAxisAlignment.center,
          children: const <Widget>[
            SizedBox(height: 450,),
            CustomElevatedButton(
              bgColor: Colors.white,
              textColor: Colors.pinkAccent,
              onPressed: null,
              height: 62,
              text: "Sign Up",
            ),
            SizedBox(height: 12,),
            CustomElevatedButton(
              bgColor: Colors.white,
              textColor: Colors.pinkAccent,
              onPressed: null,
              height: 62,
              text: "Login",
            )
          ]
      ),
    );
  }
}

Here's the code for the custom elevated button class:

import 'package:flutter/material.dart';

class CustomElevatedButton extends StatelessWidget {
  const CustomElevatedButton({
    this.height = 40.0,
    required this.bgColor,
    required this.textColor,
    this.borderRadius = 30.0,
    required this.onPressed,
    required this.text,
    this.textSize = 15.0,
  });

  final double height;
  final Color bgColor;
  final Color textColor;
  final double borderRadius;
  final VoidCallback? onPressed;
  final String text;
  final double textSize;

  @override
  Widget build(BuildContext context) {
    //IMPORTANT: I originally did not wrap this in a SizedBox. I originally
    //returned an ElevatedButton. But if you want to change the height of the
    //button, the ElevatedButton widget does not have a  height property.
    //So, you wrap it in a SizedBox widget so you can adjust the height
    return SizedBox(
      height: height,
      width: 162,
      child: ElevatedButton(
        style: ElevatedButton.styleFrom(
          primary: bgColor,
          onPrimary: textColor,
          shape: RoundedRectangleBorder(
            borderRadius: BorderRadius.circular(borderRadius),
          ),
        ),
        child: Text(
          text,
          style: TextStyle(
              fontSize: textSize
          ),
        ),
        onPressed: onPressed,
      ),
    );
  }
}

And here's what the page looks like currently. No matter what I do, I can't get the buttons to not match the background color. Any ideas on how to correct this behavior: Picture of landing page

ANSWER

Answered 2022-Mar-03 at 11:44

Try this it will work. Change on pressed from null to this.....

CustomElevatedButton(
          bgColor: Colors.white,
          textColor: Colors.pinkAccent,
          onPressed: (){
                         },
          height: 62,
          text: "Sign Up",
        ),
        SizedBox(height: 12,),
        CustomElevatedButton(
          bgColor: Colors.white,
          textColor: Colors.pinkAccent,
         onPressed: (){
                         },
          height: 62,
          text: "Login",
        )

Source https://stackoverflow.com/questions/71336423

QUESTION

Stop child NSWindow disappearing when moved to another screen

Asked 2022-Feb-27 at 16:17

On macOS Monetrey, when I move a child NSWindow to another screen (by manually dragging it), it disappears. Minimal repro using SwiftUI:

import SwiftUI

struct ContentView: View {
    var body: some View {
        Button("Hello World", action:  openChild)
            .padding(50)
    }
    
    func openChild()  {
        let win = NSWindow();
        let parent = NSApp.mainWindow
        parent?.addChildWindow(win, ordered: NSWindow.OrderingMode.above)
        win.makeKeyAndOrderFront(self)
    }
}

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}

(I know this may not be the "correct" SwiftUI way of doing things, it's just to demonstrate the problem in as little code as possible - this happens in low level Obj-C code in reality)

The interesting thing is if you:

Show the child window
Move it to another screen (it disappears)
Select "Window -> Move to [Name of other screen]"

The child window reappears and can now be moved freely between screens.

From user reports I understand that this behavior doesn't occur on Big Sur.

I know there are applications that show child windows and allow them to be moved between screens, what is the correct incantation to allow this?

ANSWER

Answered 2022-Feb-27 at 16:17

I 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.

Source https://stackoverflow.com/questions/71213724

QUESTION

How to open a new MDI sub-window in PyQt5?

Asked 2022-Feb-14 at 18:51

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 :

import sys,os
from PyQt5.QtWidgets import *
from PyQt5.QtCore import *

from sample_countrypage import Countrypage

class MainPage(QMainWindow):
    count = 0

    def __init__(self):
        super().__init__()

        self.mdi = QMdiArea()
        self.mdi.setFixedSize(1000,400)
        self.mdi.setHorizontalScrollBarPolicy(Qt.ScrollBarAsNeeded)
        self.mdi.setVerticalScrollBarPolicy(Qt.ScrollBarAsNeeded)

        self.setWindowTitle(" Sample Programme")
        self.setGeometry(100,100,1600,600)
        self.Ui()
        self.show()

    def Ui(self):
        self.btn1=QPushButton("Country")
        self.btn1.setFixedSize(100, 30)
        self.btn1.clicked.connect(self.countrypage)

        self.left_layout = QVBoxLayout()
        self.right_layout = QHBoxLayout()
        self.main_layout = QHBoxLayout()

        self.left_layout.setContentsMargins(3,5,5,3)
        self.left_layout.addWidget(self.btn1)
        self.left_layout.addStretch()
        self.right_layout.addWidget(self.mdi)

        self.main_layout.setSpacing(5)
        self.main_layout.setContentsMargins(0,0,0,0)
        self.main_layout.addLayout(self.left_layout)
        self.main_layout.addLayout(self.right_layout)
        self.main_layout.addStretch()

        widget = QWidget()
        widget.setLayout(self.main_layout)
        self.setCentralWidget(widget)

        self.subwindow1 = QMdiSubWindow()
        self.subwindow1.setObjectName("SubWindow_1")
        # self.subwindow1.setWindowFlag(Qt.FramelessWindowHint)


    print(Countrypage.btn2click)

    def countrypage(self):
        self.countrywindow = Countrypage()
        self.subwindow1.setWidget(self.countrywindow)
        self.subwindow1.setWindowTitle("Create Country")
        self.subwindow1.setFixedWidth(300)
        self.mdi.addSubWindow(self.subwindow1)
        self.subwindow1.show()
        self.mdi.cascadeSubWindows()
        self.countrywindow.closeRequsted.connect(self.subwindow1close)

    def subwindow1close(self):
        print("close activated from mdi programme")

        self.subwindow1.close()

if __name__ == "__main__":
    app = QApplication(sys.argv)
    mainwindow = MainPage()
    app.setStyle("Windows")
    mainwindow.show()
    sys.exit(app.exec_())

Countrypage.py

import sys,os
from PyQt5.QtWidgets import QWidget,QApplication,QPushButton,QLineEdit,QFormLayout,QVBoxLayout,QHBoxLayout
from PyQt5.QtCore import pyqtSignal

class Countrypage(QWidget):
    closeRequsted = pyqtSignal()
    def __init__(self):
        super().__init__()

        self.btn1 = QPushButton("close")
        self.btn2 = QPushButton("New")
        self.btn1.clicked.connect(self.result)
        self.btn2.clicked.connect(self.btn2click)

        self.tb_country = QLineEdit()
        self.tb_continent =QLineEdit()

        self.form_layout = QFormLayout()
        self.form_layout.addRow("Country",self.tb_country)
        self.form_layout.addRow("continent",self.tb_continent)
        self.form_layout.addRow("",self.btn2)
        self.form_layout.addRow("",self.btn1)
        self.setLayout(self.form_layout)

    def result(self):
        self.closeRequsted.emit()

    def btn2click(self):
        btn2text = (self.btn2.text())
        print(btn2text)

if __name__=="__main__":
    app = QApplication(sys.argv)
    countrywin = Countrypage()
    countrywin.show()
    sys.exit(app.exec_())

ANSWER

Answered 2022-Feb-14 at 18:38

The 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:

import sys, os
from PyQt5.QtWidgets import *
from PyQt5.QtCore import *   

class MainPage(QMainWindow):
    def __init__(self):
        super().__init__()
        self.mdi = QMdiArea()
        self.mdi.setFixedSize(1000, 400)
        self.mdi.setHorizontalScrollBarPolicy(Qt.ScrollBarAsNeeded)
        self.mdi.setVerticalScrollBarPolicy(Qt.ScrollBarAsNeeded)
        self.setWindowTitle("Sample Programme")
        self.setGeometry(100, 100, 1600, 600)
        self.Ui()

    def Ui(self):
        self.btn1 = QPushButton("Country")
        self.btn1.setFixedSize(100, 30)
        self.btn1.clicked.connect(self.countrypage)
        self.left_layout = QVBoxLayout()
        self.right_layout = QHBoxLayout()
        self.main_layout = QHBoxLayout()
        self.left_layout.setContentsMargins(3, 5, 5, 3)
        self.left_layout.addWidget(self.btn1)
        self.left_layout.addStretch()
        self.right_layout.addWidget(self.mdi)
        self.main_layout.setSpacing(5)
        self.main_layout.setContentsMargins(0, 0, 0, 0)
        self.main_layout.addLayout(self.left_layout)
        self.main_layout.addLayout(self.right_layout)
        self.main_layout.addStretch()
        widget = QWidget()
        widget.setLayout(self.main_layout)
        self.setCentralWidget(widget)

    def countrypage(self):
        page = Countrypage()
        subwindow = self.mdi.addSubWindow(page)
        subwindow.setWindowTitle("Create Country")
        subwindow.setFixedWidth(300)
        page.btn_close.clicked.connect(self.subwindowclose)
        page.btn_new.clicked.connect(self.countrypage)
        subwindow.show()
        self.mdi.cascadeSubWindows()

    def subwindowclose(self):
        print("close activated from mdi programme")
        current = self.mdi.activeSubWindow()
        if current is not None:
            self.mdi.activatePreviousSubWindow()
            previous = self.mdi.activeSubWindow()
            if previous is not None:
                previous.widget().update_fields(current.widget())
            current.close()

if __name__ == "__main__":

    app = QApplication(sys.argv)
    mainwindow = MainPage()
    app.setStyle("Windows")
    mainwindow.show()
    sys.exit(app.exec_())

Countrypage.py:

import sys,os
from PyQt5.QtWidgets import QWidget,QApplication,QPushButton,QLineEdit,QFormLayout,QVBoxLayout,QHBoxLayout
from PyQt5.QtCore import pyqtSignal

class Countrypage(QWidget):
    def __init__(self):
        super().__init__()
        self.btn_close = QPushButton("Close")
        self.btn_new = QPushButton("New")
        self.tb_country = QLineEdit()
        self.tb_continent = QLineEdit()
        self.form_layout = QFormLayout()
        self.form_layout.addRow("Country", self.tb_country)
        self.form_layout.addRow("Continent", self.tb_continent)
        self.form_layout.addRow("", self.btn_close)
        self.form_layout.addRow("", self.btn_new)
        self.setLayout(self.form_layout)

    def update_fields(self, other):
        if isinstance(other, Countrypage):
            self.tb_country.setText(other.tb_country.text())
            self.tb_continent.setText(other.tb_continent.text())
        else:
            raise TypeError('invalid page type')

Source https://stackoverflow.com/questions/71027763

QUESTION

How to dynamically define Headers and Settings for UWP NavigationView's menu, using C++/winRT?

Asked 2022-Feb-02 at 17:01

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):

bool
CANavigationView::UpdateHostView( void )
{
    TNavigationItemPtr item;
    TIndex index;

    if( _hostViewUpdateNeeded == false )
        return false;

    Windows::UI::Xaml::Controls::NavigationViewItemBase hItem( nullptr );
    Windows::UI::Xaml::Controls::TextBlock hText( nullptr );
    winrt::hstring hTag;

    // Remove all navigation items from the current host view:
    _hostNavigationView.MenuItems().Clear();
    _hostNavigationView.IsSettingsVisible( false );

    // Build the navigation menu items:
    for( index = 0; index < _navigationItems.CountOfItems(); index++ )
    {
        item = * _navigationItems.GetItemAtIndex( index );

        if( item->identifier == kSettingsItem )
        {
            _hostNavigationView.IsSettingsVisible( true );
            hText = Windows::UI::Xaml::Controls::TextBlock();
            CSString::ConvertToUIString( item->title->GetString( gAppLanguageCode ), & hTag );
            hText.Text( hTag );
//          Issue #1 : cannot access to the Settings item
//          _hostNavigationView.SettingsItem().as< Windows::UI::Xaml::Controls::NavigationViewItem >().Content( hText );
//          SettingsItem() returns nullptr...
        }
        else
        {
            switch( item->type )
            {
                case eNavigationHeader:
                    hItem = Windows::UI::Xaml::Controls::NavigationViewItemHeader();
                    hText = Windows::UI::Xaml::Controls::TextBlock();
                    CSString::ConvertToUIString( item->title->GetString( gAppLanguageCode ), & hTag );
                    hText.Text( hTag );
//                  Issue #2: The header's title is not displayed
                    hItem.Content( hText );
                    _hostNavigationView.MenuItems().Append( hItem );
                    break;

                case eNavigationSeparator:
                    hItem = Windows::UI::Xaml::Controls::NavigationViewItemSeparator();
                    _hostNavigationView.MenuItems().Append( hItem );
                    break;

                case eNavigationItem:
                    hItem = Windows::UI::Xaml::Controls::NavigationViewItem();
                    CSString::ConvertToUIString( CAUIElement::GetStringFromUIIdentifier( item->identifier ), & hTag );
                    hItem.Tag( winrt::box_value( hTag ) );
                    hText = Windows::UI::Xaml::Controls::TextBlock();
                    CSString::ConvertToUIString( item->title->GetString( gAppLanguageCode ), & hTag );
                    hText.Text( hTag );
                    hItem.Content( hText );
                    hItem.as< Windows::UI::Xaml::Controls::NavigationViewItem>().Icon( GetHostIcon( item->icon ) );
                    _hostNavigationView.MenuItems().Append( hItem );
                    break;

                default:
                    break;
            }
        }
    }

    _hostViewUpdateNeeded = false;

    return true;
}

As I'm using my own string format (I'm stuck in old C++ standards...) and I18N support, I need to first convert the UTF8 string to the host (here Windows) before setting the value of the text block, using the hTag variable of type hstring. In debugging mode, the text is well transcoded in the hstring format...

What is puzzling me is the fact that both NavigationSeparator and NavigationItem cases are working fine, in line with the official Microsoft documentation (including the Tag for menu event handling and Icon setting for NavigationViewItem).

I understand this is not the "mainstream XAML way" of working on UWP user interface but so far the approach is working well on other UI elements.

Here is a screenshot of the navigation view with the empty spaces for the headers:

Also, in the example above, I logged the number of menu items in the host navigation view (_hostNavigationView.MenuItems().Size()) and got 7 as a result, which is correct...

At last, here's the detailed log I'm generating in DEBUG mode:

DBG-[000002686A230710]CANavigationView::UpdateDisplayedLanguage() {
    DBG-[000002686A230710]CANavigationView::UpdateHostView() {
        DBG-[000002686A230710]CANavigationView::UpdateHostView() Navigation item 0, type 2
        DBG-[000002686A230710]CANavigationView::UpdateHostView() Header case: Reference Library
        DBG-[000002686A230710]CANavigationView::UpdateHostView() Navigation item 1, type 1
        DBG-[000002686A230710]CANavigationView::UpdateHostView() Navigation item case
        DBG-[000002686A230710]CANavigationView::UpdateHostView() Navigation item 2, type 1
        DBG-[000002686A230710]CANavigationView::UpdateHostView() Navigation item case
        DBG-[000002686A230710]CANavigationView::UpdateHostView() Navigation item 3, type 1
        DBG-[000002686A230710]CANavigationView::UpdateHostView() Navigation item case
        DBG-[000002686A230710]CANavigationView::UpdateHostView() Navigation item 4, type 3
        DBG-[000002686A230710]CANavigationView::UpdateHostView() Separator case
        DBG-[000002686A230710]CANavigationView::UpdateHostView() Navigation item 5, type 2
        DBG-[000002686A230710]CANavigationView::UpdateHostView() Header case: Project Library
        DBG-[000002686A230710]CANavigationView::UpdateHostView() Navigation item 6, type 1
        DBG-[000002686A230710]CANavigationView::UpdateHostView() Navigation item case
        DBG-[000002686A230710]CANavigationView::UpdateHostView() Navigation item 7, type 1
        DBG-[000002686A230710]CANavigationView::UpdateHostView() Settings case
        DBG-[000002686A230710]CANavigationView::UpdateHostView() Value of SettingsItem(): 0000000000000000
        DBG-[000002686A230710]CANavigationView::UpdateHostView() Count of menu items for the navigation view: 7 (8)
    DBG-}
DBG-}

Your help in solving those two issues would be greatly appreciated !

Best regards,

Arnaud

ANSWER

Answered 2022-Feb-02 at 11:34

Dynamic 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.

Source https://stackoverflow.com/questions/70944049

QUESTION

Android Jetpack Compose: Keyboard changing from numeric to alphabets after modifying input text

Asked 2021-Dec-24 at 04:43

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.

@Composable
fun TFDemo() {
    var fieldValue by remember { mutableStateOf(TextFieldValue("")) }

    TextField(
        value = fieldValue,
        onValueChange = {
            val newMessage = it.text.let { text -> if (text.length == 3) "$text," else text }
            fieldValue = it.copy(newMessage, selection = TextRange(newMessage.length))
        },
        keyboardOptions = KeyboardOptions(autoCorrect = false),
    )
}

But after running it, I realized that after the comma is added, keyboard view changed back to alphabets from numbers/symbols which should not be the case. See video output below for clarity

As you can see in the below video when I typed "111" comma was appended and suddenly keyboard's numeric view changed to alphabets again.

Here I have modified the selection of TextFieldValue so that cursor always be at the end of the message whenever a comma is appended.

ANSWER

Answered 2021-Dec-18 at 11:45

This 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.

Source https://stackoverflow.com/questions/70401519

QUESTION

Achieve Unique Column Width for each Cell in Different Rows with a GridPane?

Asked 2021-Nov-24 at 16:43

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 00:54

For the specific layout in the image, I would use a VBox with HBox for rows:

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.stage.Stage;
import javafx.scene.layout.StackPane;
import javafx.scene.layout.Pane;
import javafx.scene.layout.VBox;
import javafx.scene.layout.HBox;
import javafx.scene.layout.Priority;
import javafx.scene.control.Label;
import javafx.scene.control.TextField;
import javafx.geometry.Insets;
import javafx.geometry.Pos;

public class App extends Application {

    @Override
    public void start(Stage stage) {

        Label lblFirst = new Label("First");
        Label lblLast = new Label("Last");
        Label lblNumber = new Label("Card Number");
        Label lblMonth = new Label("Month");
        Label lblYear = new Label("Year");
        Label lblCVV = new Label("CVV");
        
        TextField txtFirst = new TextField();
        TextField txtLast = new TextField();
        TextField txtNumber = new TextField();
        TextField txtMonth = new TextField();
        TextField txtYear = new TextField();
        TextField txtCVV = new TextField();

        HBox row1 = new HBox(10);
        HBox row2 = new HBox(10);
        HBox row3 = new HBox(10);
        
        row1.getChildren().add(createCell(lblFirst, txtFirst));
        row1.getChildren().add(createCell(lblLast, txtLast));
        
        row2.getChildren().add(createCell(lblNumber, txtNumber));
        
        row3.getChildren().add(createCell(lblMonth, txtMonth));
        row3.getChildren().add(createCell(lblYear, txtYear));
        row3.getChildren().add(createCell(lblCVV, txtCVV));
        
        VBox rows = new VBox(10, row1, row2, row3);
        
        StackPane.setMargin(rows, new Insets(10));
        
        StackPane root = new StackPane(rows);

        Scene scene = new Scene(root);

        stage.setScene(scene);
        stage.show();
    }

    private static HBox createCell(Label label, TextField text) {
        HBox pane = new HBox(5, label, text);
        label.setMinWidth(Pane.USE_PREF_SIZE);
        text.setMinWidth(50);
        pane.setAlignment(Pos.CENTER);
        HBox.setHgrow(pane, Priority.ALWAYS);
        HBox.setHgrow(text, Priority.ALWAYS);
        return pane;
    }

    public static void main(String[] args) {
        launch();
    }

}

Output:

Source https://stackoverflow.com/questions/70088871

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Vulnerabilities

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