checkbox

问题 I am using a PostgreSQL database and Rails 5.0.6. I try to build a course allocation WebApp for the school where I am working. For each course the teachers are able to select which forms are allowed to visit the course. Migration file: def up create_table :courses do |t| t.integer :number, null: false t.string :name, null: false t.text :description, null: false t.decimal :level, array: true, default: [] t.integer :max_visitor, null: false t.integer :min_visitor t.integer :pos_visit t

问题 I have a table where I can check a checkbox and it will log all of the contents in the row. There are some search functions and other buttons on the page, so I want to use session storage to be able to keep any checkboxes that are checked, checked, throughout refreshes until the page is closed. I have something from an example I found but it doesnt seem to be working. How could I fix this? HTML for table column/row with checkboxes: <td class="ui-widget-content"><input type="checkbox" class=

问题 I have a table where I can check a checkbox and it will log all of the contents in the row. There are some search functions and other buttons on the page, so I want to use session storage to be able to keep any checkboxes that are checked, checked, throughout refreshes until the page is closed. I have something from an example I found but it doesnt seem to be working. How could I fix this? HTML for table column/row with checkboxes: <td class="ui-widget-content"><input type="checkbox" class=

问题 I have a table where I can check a checkbox and it will log all of the contents in the row. There are some search functions and other buttons on the page, so I want to use session storage to be able to keep any checkboxes that are checked, checked, throughout refreshes until the page is closed. I have something from an example I found but it doesnt seem to be working. How could I fix this? HTML for table column/row with checkboxes: <td class="ui-widget-content"><input type="checkbox" class=

问题 I need to have 2 groups of controls on the screen: inputs and outputs (so they have 2 states: On or Off ). Thus CheckBox seems to be a good choice. Checking any output will set it. However, when displaying inputs there will be no user interaction with it. User is only allowed to see its value, not to change it. Question: how to make checkbos visually appears as read-only ? Could think about possible solutions: Make CheckBox disabled. Bad: there will be no tooltip (possible to solve it? by

问题 I create a check button / box, with the following call x=ttk.Checkbutton(tab1,state='disabled',command = lambda j=i,x=k: fCheckButton(j,x)) x.state(['selected']) The box appears fine and is selected, but it appears on load up, with a black box in it, which seems to have nothing to do with the state of it. I have looked for reasons why, but can't actually find anyone with the same problem. thanks 回答1: I've had a similar issue on Windows 7. After loading the app, one of my checkbuttons

问题 I want to create a round CheckBox like this I've tried multiple variations of this, but none of them seem to work. Including I tried to use ClipRRect . Because there are more code, I only select part of it to show here. new Row( children: <Widget>[ //new ClipRRect( // borderRadius: BorderRadius.all(Radius.circular(90.0)), // child: new Checkbox( tristate: true, value: true, onChanged: (bool newValue){ setState(() { }); }, activeColor: Color(0xff06bbfb), ), // ), new Expanded( child: new Text(

问题 I want to create a round CheckBox like this I've tried multiple variations of this, but none of them seem to work. Including I tried to use ClipRRect . Because there are more code, I only select part of it to show here. new Row( children: <Widget>[ //new ClipRRect( // borderRadius: BorderRadius.all(Radius.circular(90.0)), // child: new Checkbox( tristate: true, value: true, onChanged: (bool newValue){ setState(() { }); }, activeColor: Color(0xff06bbfb), ), // ), new Expanded( child: new Text(

问题 I have 4 checkboxes and one hidden field that will contain any one of four email addresses, depending on which options have been selected. The email address will also need to be removed from the hidden field if the corresponding checkbox is unchecked. I have no idea how to write such function and was hoping somebody could atleast point me in the right direction or could someone write the script for me please? 回答1: Assuming you have the following html: <input type="checkbox" name="email[]"

问题 I am new to Kotlin. I created a fragment and implemented View.OnClickListener and CheckBox.OnCheckedChangeListener . The View.OnClickListener works as expected but it shows Unresloved reference for CheckBox.OnCheckedChangeListener . The code is below class LoginFragment : Fragment(), View.OnClickListener, CheckBox.OnCheckedChangeListener { override fun onClick(view: View?) { } } How can I implement CheckBox.OnCheckedChangeListener ..? Thanks in advance 回答1: Use CheckBox