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How to check all checkbox by pressing one?


By : xgoodvibesx
Date : October 17 2020, 08:10 PM
This might help you Note: there's most likely a better way to do this, but this is a pattern I used a long time ago and it worked then. :)
In the event you've shown above, it will be called from the listView, and the ItemCheckEventArgs e will tell you if the box is checked or not. It actually tells you the state of the checkbox before the check. So if checkbox was unchecked and the user just checked it, e.CurrentValue will be CheckState.Unchecked.
code :
// Set this to true when our code is modifying the checked state of a listbox item
private bool changingCheckboxState = false;

private void lvBase_ItemCheck(object sender, ItemCheckEventArgs e)
{
    // If our code triggered this event, just return right away
    if (changingCheckboxState) return;

    // Set our flag so that calls to this method inside the 
    // loop below don't trigger more calls to this method
    changingCheckboxState = true;

    // Set all the checkboxes to match the state of this one
    foreach(ListViewItem item in lvBase.Items)
    {
        item.Checked = e.CurrentValue != CheckState.Checked;
    }

    // Now that we're done, set our flag to false again
    changingCheckboxState = false;
}


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Split comma seperated value and match with checkbox value and check that checkbox along with its parent checkbox


By : David Hardwick
Date : March 29 2020, 07:55 AM
should help you out I have comma seperated value store in my variable and i will use this comma seperated value and match with my checkbox value and with those match checkbox value i will check that checkbox along with it parent checkbox.
code :
$(document).ready(function () {
var id = "1,2"; //here id can contain value either 1,2 or 3,4 //Now i want to split id variable value by comma and want to find all checkbox in Checkboxprocess div only and if any checkbox value match with checkbox then i want to //check that checkbox along with its parent checkbox. //For Eg if Id contains 1,2 then i want to check checkbox chkchild1 and chkchild2 and its parent chkParent1

/*Get All the checkbox. This includes parent checkboxes too*/
var allCheckboxes = $('#Checkboxprocess input:checked');

/*loop through checkboxes*/
$.each(allCheckboxes, function () {
    /*get the value of check box. Please note that this will also include the value of parent checkbox too but as the 'id' variable will only contain values of child checkboxes, the $.inArray(checkBoxVal,id) values always return '-1' in case of parent checkbox value. */
    /*Getting the value of each checkbox and $.inArray(checkBoxVal,id)
  checks if checkbox value present in id variable or not */
    var checkBoxVal = $(this).val();
    if ($.inArray(checkBoxVal, id) > -1) {
        /*Get parent checkbox*/
        var parentChechBox = $(this).closest('div').find(':checkbox:first');
        $(parentChechBox).prop('checked', 'checked');
    }
});});

PyQt4: When one checkbox is checked, by pressing a button to print some texts from a LineEdit if another checkbox is als


By : Mohanad Elhag
Date : March 29 2020, 07:55 AM
this one helps. The problem is that you are creating several Tab1Widget2, the first one you created in Tab1Layout, and that is the one you see, then you have created another one in Tab1Widget1, but not the time because you have not passed a parent, if you pass it to ** self ** as parent you will observe the following:
code :
self.bridge = Tab1Widget2(self)
class Tab1Widget1(QWidget):
    def __init__(self, bridge, parent=None): # Modify here
        super().__init__(parent)
        self.Tab1Widget1initUI()
        self.bridge = bridge  #Modify here

    # ...

    def test(self): print ('123')

    def run(self):
        if self.T1W1_checkbox.isChecked():
            self.test()
            if self.bridge.T1W2_checkbox.isChecked():
                print (self.bridge.T1W2_le.text())

class Tab1Widget2(QWidget):
    # ...

class Tab1Layout(QWidget):
    def __init__(self, parent=None):
        super().__init__()
        self.setLayout(QGridLayout())

        self.group2 = Tab1Widget2(self) # Modify here
        self.group1 = Tab1Widget1(self.group2, self) # Modify here
        scroll = QScrollArea(self)
        scroll.setWidget(self.group1)
        scroll.setWidgetResizable(True)
        self.layout().addWidget(scroll, 0, 0)

        # self.group2 = Tab1Widget2(self) # Modify here
        self.layout().addWidget(self.group2, 1, 0)

        # ...

update datagridview based on checkbox value - Loop all the row's checkbox and check whether any checkbox has been select


By : user1772501
Date : March 29 2020, 07:55 AM
it fixes the issue I ran into this problem before, my solution was to add all my GUI elements (in your case checkboxes, my case textboxes) to make them easy to iterate through. You can then check their state:
code :
List<CheckBox> checkbox_list = new List<CheckBox>();
//proceed to manually add all checkboxes to this list upon program initialization
checkbox_list.Add(checkbox1);
//...
//so on until you are done

bool check = false; //we are looking for at least one true, so start with false
for(int i = 0; i < checkbox_list.Count; i++)
{
    if(checkbox_list[i].Checked == true)
        check = true;
}

if(check == true)
    Console.WriteLine("At least one checkbox is checked.");
else
    Console.WriteLine("No checkboxes checked.");

//use "check" bool to determine whether to update

Check checkbox when pressing on table row


By : user5033012
Date : March 29 2020, 07:55 AM
Any of those help You don't need JavaScript for this - just wrap the checkbox and the text in a

react-native checkbox, how do I check or uncheck by using checkbox when I press the checkbox?


By : Garrison Layne Geho
Date : March 29 2020, 07:55 AM
should help you out I would like to know how I can check and uncheck checkbox in react-native? , Here's a quick and very simple implementation.
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