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How to show the name of chosen element in dropdownmenu working with object?


By : user2176124
Date : October 14 2020, 02:22 PM
like below fixes the issue You would set the value of the currently selected location. It would need to be passed to this new custom stateless object.
Here's a working sample:
code :
class HomePage extends StatefulWidget {
  @override
  State<StatefulWidget> createState() => _HomePageState();
}

class _HomePageState extends State<HomePage> {
  Location _selectedLocation;
  final _locations = [
    new Location("home", "1"),
    new Location("office", "2"),
    new Location("work", "3"),
  ];

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text("Sample"),),
      body: DropButt(
        _selectedLocation,
        locations: _locations,
        onchange: (location) {
          setState(() {
            _selectedLocation = location;
          });
        },
      ),
    );
  }
}

class DropButt extends StatelessWidget {
  DropButt(this.selectedLocation, {Key key, this.locations, this.onchange});

  final Location selectedLocation;
  final List<Location> locations;
  Function(Location) onchange;

  @override
  Widget build(BuildContext context) {
    return DropdownButton<Location>(
      value: selectedLocation, // <--- this is the current selected object
      items: locations.map((Location val) {
        return new DropdownMenuItem<Location>(
          value: val,
          child: new Text(val.name), // <--- this is what the user sees
        );
      }).toList(),
      onChanged: onchange,
    );
  }
}

class Location {
  final String name;
  final String uid;

  Location(this.name, this.uid);
}


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Name object automatically and show their properties when chosen


By : Gabriel Pelletier
Date : March 29 2020, 07:55 AM
Hope this helps Here is my assumption,
You have a Class named "SomeClass", When you click "New" Button, the new object should be created and it should be added to the list.
code :
SomeClass cls = new SomeClass();
cls.Description ="desc";
list.Add(cls)

Show ToolTip with ComboBox (dropdownmenu)


By : E.Mir
Date : March 29 2020, 07:55 AM
Does that help I've tried digging in the MouseHover event of a ComboBox and looks like it doesn't work normally as we expect. The MouseHover is in fact fired only when you move the mouse over the drop down button if your ComboBox has style of dropdown. The simplest solution for this is change your combobox style to dropdownlist like this:
code :
comboBox1.DropDownStyle = ComboBoxStyle.DropDownList;
public partial class Form1 : Form {
  public Form1(){
    InitializeComponent();
     t.Interval = 600;
     t.Tick += (se, ev) => {
       buttonToolTip.SetToolTip(comboBox1, (string)comboBox1.SelectedItem);
       t.Stop();
     };
     //init the buttonToolTip
     buttonToolTip.ToolTipTitle = "Value";
     buttonToolTip.UseFading = true;
     buttonToolTip.UseAnimation = true;
     buttonToolTip.IsBalloon = true;
     buttonToolTip.ShowAlways = true;
     buttonToolTip.AutoPopDelay = 5000;
     buttonToolTip.InitialDelay = 1000;
     buttonToolTip.ReshowDelay = 0;
     //register MouseMove event handler for your comboBox1
     comboBox1.MouseMove += (se, ev) => {                    
       //Restart the timer every time the mouse is moving
       t.Stop();
       t.Start();
     };
  }
  Timer t = new Timer();
  ToolTip buttonToolTip = new ToolTip();
}

Attempt to invoke virtual method 'void com.jayfang.dropdownmenu.DropDownMenu.setmMenuCount(int)' on a null object refere


By : Mincho Minchev
Date : March 29 2020, 07:55 AM
will help you It means that findViewById(R.id.activity_main_alternate) returns null for mMenu. Does your activity_main_alternate.xml have the R.id.menu view?

DropDownMenu does not show list of items


By : nate
Date : March 29 2020, 07:55 AM

Show or hide html element on chosen shipping method change in Woocommerce


By : user1597424
Date : March 29 2020, 07:55 AM
I hope this helps . The needed code is something much more simple, than the one used in my other answers, but you need to be sure that the targeted chosen shipping method is 'distance_rate_shipping' as I can't test it.
code :
// Embedded jQuery script
add_action( 'wp_footer', 'checkout_delivery_date_script' );
function checkout_delivery_date_script() {
    // Only checkout page
    if( ! ( is_checkout() && ! is_wc_endpoint_url() ) ) return;
    ?>
    <script type="text/javascript">
    jQuery( function($){
        var a = 'input[name^="shipping_method"]', b = a+':checked',
            c = 'distance_rate_shipping',
            d = '#e_deliverydate_field,#time_slot_field';

        // Utility function that show or hide the delivery date
        function showHideDeliveryDate(){
            if( $(b).val() == c )
                $(d).show();
            else
                $(d).hide('fast');
            console.log('Chosen shipping method: '+$(b).val()); // <== Just for testing (to be removed)
        }

        // 1. On start
        showHideDeliveryDate();

        // 2. On live event "change" of chosen shipping method
        $('form.checkout').on('change', a, function(){
            showHideDeliveryDate();
        });
    });
    </script>
    <?php
}
// 1. On start
showHideDeliveryDate();
// 1. On start
setTimeout(function(){
    showHideDeliveryDate();
}, 500);
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