binding

问题 How are DataContext in UserControls usually set? If I do something like the below in my UserControl, DataContext = this In my Window or other Controls when I want to use the Control with a Binding, I will have to have a RelativeSource to point to the Window/UserControl <local:UserControl1 TextContent="{Binding Text1, RelativeSource={RelativeSource AncestorType={x:Type Window}}}" /> Is the way to bind Controls within UserControls: set use RelativeSource in UserControls instead of DataContext ?

问题 I've a simple control with dependency property like this public class StatusProgress : Control { public string Text { get { return (string)GetValue(TextProperty); } set { SetValue(TextProperty, value); } } public static readonly DependencyProperty TextProperty = DependencyProperty.Register("Text", typeof(string), typeof(StatusProgress), new FrameworkPropertyMetadata(null, (d, e) => (d as StatusProgress).TextUpdated(e.OldValue as string))); private void TextUpdated(string text) { Trace

问题 I am creating some sample applications to understand the concepts of view navigation, binding etc in cocoa. Here is the scenario: I have a window that has a tab view(2 tabs) in MainMenu.Xib. I have a text field in the first tab and label in the second tab. I want both of them to reflect the same value and I want to do this using binding. Also, I don't want to use the views provided to me along with the tab view. These are the steps I have done. The view of each tab view item is set separately

问题 I have a user control let say UC1 . This user control have viewmodel UC1_vm. In the usercontrol UC1 I have a canvas in which drawing curve logic is implemented. This drawing curve logic is based on the data points property in the view model ( UC1_vm). The data points property inside the view model change with different condition. The generation of data points is written in the View Model. I want to bind the data points property in the view model to the draw curve logic inside the User control

问题 I found this example of C++ Python binding: Calling C/C++ from python? According to the answer there, I created some testfiles: foo.cpp: #include <iostream> #include <utility> int bar_2(int a, int b){ return a*b; } std::pair<int, int> divide(int dividend, int divisor) { return std::make_pair(dividend / divisor, dividend % divisor); } extern "C" { int bar_2_py(int a, int b){ return bar_2(a,b); } std::pair<int, int> divide_py(int d, int div){return divide(d,div);} } fooWrapper.py: #!/usr/bin

问题 I hope to find an answer on how to achieve functionality I am trying to have. I have two listboxes. I generate content for them from XML. I also define UriSources in XML. I'd like to find out how to achieve a navigation by clicking any listbox item in any listbox. As a result, I need to be able to update Frame's Source property from two different lisboxes. Perphaps, it should be multibind with some converter. Any ideas are highly appreciated. XAML: Listboxes and Frame: <Window xmlns="http:/

问题 I can't understand the following 2 issues given this code. I mapped a combobox to a custom object and I want each time that the selected value change on the combobox, the custom object changes too. public partial class MainForm : Form { private Person _person; public MainForm() { InitializeComponent(); _person = new Person(); //Populating the combox, we have this.comboBoxCities.DataSource = this.cityBindingSource; cityBindingSource.Add(new City("London")); cityBindingSource.Add(new City(

问题 Here is a code sample I use: <div ng-class="{alert: ((elements|filter:{hasAlert: true}).length / elements.length) > maxPercentAlerts}"> {{(elements|filter:{hasAlert: true}).length}} ({{Math.floor((elements|filter:{hasAlert: true}).length * 100 / elements.length)}} %) </div> As you see, I need to filter my 'elements' array 3 times. I would like to use this kind of following code to increase perfs: (this is just an example of what I need, not real code) <div some-ng-prop="alertCount=(elements

问题 I need to include jquery and form validations libraries into a specific component. I have already tried react-async-script-loader but couldn't get it to work. Please note, I am using the Laravel and ReactJS. Also the code I have included is the sample code from the github repository (https://github.com/leozdgao/react-async-script-loader). However, I have the downloaded files to used in the Laravel public folder. Here is the error I am getting: Uncaught TypeError: Cannot convert undefined or

问题 I have a combobox, whose SelectedItem is bound to a dependency property. public IEnumerable<KeyValuePair<int,string>> AllItems { get { return _AllItems; } set { _AllItems = value; this.NotifyChange(() => AllItems); } } public KeyValuePair<int, string> SelectedStuff { get { return (KeyValuePair<int, string>)GetValue(SelectedStuffProperty); } set { SetValue(SelectedStuffProperty, value); LoadThings(); } } public static readonly DependencyProperty SelectedStuffProperty = DependencyProperty