mirror of
https://gitee.com/akwkevin/aistudio.-wpf.-diagram
synced 2026-03-03 00:00:57 +08:00
335 lines
13 KiB
C#
335 lines
13 KiB
C#
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using System;
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using System.Collections;
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using System.Collections.ObjectModel;
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using System.ComponentModel;
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using System.Globalization;
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using System.Reflection;
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using System.Windows;
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using System.Windows.Controls;
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using System.Windows.Data;
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using System.Windows.Markup;
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namespace AIStudio.Wpf.ADiagram.Commands
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{
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[MarkupExtensionReturnType(typeof(object))]
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public class ControlBinding : MarkupExtension
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{
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/// <summary>
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/// 是否禁止处理绑定
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/// </summary>
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public static bool Disabled = false;
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#region Properties
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public IValueConverter Converter { get; set; }
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public object ConverterParameter { get; set; }
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public string ElementName { get; set; }
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public RelativeSource RelativeSource { get; set; }
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public object Source { get; set; }
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public bool ValidatesOnDataErrors { get; set; }
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public bool ValidatesOnExceptions { get; set; }
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public bool NotifyOnValidationError { get; set; }
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public object TargetNullValue { get; set; }
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public object FallBackValue { get; set; }
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public string StringFormat { get; set; }
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public UpdateSourceTrigger UpdateSourceTrigger { get; set; }
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public Collection<ValidationRule> ValidationRules { get; set; }
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public BindingMode Mode { get; set; }
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private int AncestorLevel = 1;
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[ConstructorArgument("path")]
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public PropertyPath Path { get; set; }
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[TypeConverter(typeof(CultureInfoIetfLanguageTagConverter))]
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public CultureInfo ConverterCulture { get; set; }
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#endregion
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public ControlBinding()
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{
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Mode = BindingMode.Default;
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ValidationRules = new Collection<ValidationRule>();
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}
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public ControlBinding(PropertyPath path)
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{
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Path = path;
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Mode = BindingMode.Default;
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UpdateSourceTrigger = UpdateSourceTrigger.PropertyChanged;
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NotifyOnValidationError = true;
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ValidatesOnDataErrors = true;
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ValidatesOnExceptions = true;
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TargetNullValue = null;
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ValidationRules = new Collection<ValidationRule>();
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}
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public ControlBinding(PropertyPath path, string elementName)
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: this(path)
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{
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Path = path;
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if (elementName == "$")
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AncestorLevel = 2;
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else
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ElementName = elementName;
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}
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/// <summary>
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/// 获取代理Binding对象
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/// </summary>
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/// <returns></returns>
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internal Binding GetBinding(object rootObject)
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{
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Binding binding = new Binding();
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binding.StringFormat = StringFormat;
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binding.Path = Path;
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binding.Mode = Mode;
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binding.Converter = Converter;
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binding.ConverterCulture = ConverterCulture;
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binding.ConverterParameter = ConverterParameter;
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binding.UpdateSourceTrigger = UpdateSourceTrigger;
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if (TargetNullValue != null) binding.TargetNullValue = TargetNullValue;
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if (FallBackValue != null)
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binding.FallbackValue = FallBackValue;
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//单向绑定不需要进行数据校验
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NotifyOnValidationError &= (Mode != BindingMode.OneWay && Mode != BindingMode.OneTime);
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binding.ValidatesOnDataErrors = NotifyOnValidationError;
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binding.ValidatesOnExceptions = NotifyOnValidationError;
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binding.NotifyOnValidationError = NotifyOnValidationError;
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//添加ValidationRule
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foreach (ValidationRule vr in ValidationRules)
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binding.ValidationRules.Add(vr);
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if (ElementName != null)
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binding.ElementName = ElementName;
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if (Source != null)
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{
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if (!(Source is string) || (Source as string) != "$")
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binding.Source = Source;
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}
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if (RelativeSource != null)
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binding.RelativeSource = RelativeSource;
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if (string.IsNullOrEmpty(ElementName) && Source == null && RelativeSource == null)
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{
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if (rootObject == null)
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{
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RelativeSource = new RelativeSource { AncestorLevel = AncestorLevel, AncestorType = typeof(UserControl), Mode = RelativeSourceMode.FindAncestor };
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binding.RelativeSource = RelativeSource;
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}
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else
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{
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binding.Source = rootObject;
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if (rootObject is UserControl || rootObject is Window)
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{
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if (binding.Path == null || binding.Path.Path == ".")
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binding.Path = new PropertyPath("DataContext");
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else
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binding.Path = new PropertyPath("DataContext." + binding.Path.Path, binding.Path.PathParameters);
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}
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}
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}
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return binding;
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}
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public override object ProvideValue(System.IServiceProvider serviceProvider)
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{
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var valueProvider = serviceProvider.GetService(typeof(IProvideValueTarget)) as IProvideValueTarget;
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if (valueProvider == null)
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return null;
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//当使用ControlMultiBinding或者MultiBinding时
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if (valueProvider.TargetProperty == null && valueProvider.TargetObject is ICollection)
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{
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if (valueProvider.TargetObject is Collection<ControlBinding>
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|| valueProvider.TargetObject.GetType().FullName == "MS.Internal.Data.BindingCollection")
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return this;
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}
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//如果禁用
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if (ControlBinding.Disabled)
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return (valueProvider.TargetProperty as DependencyProperty).DefaultMetadata.DefaultValue;
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var rootObjProvider = serviceProvider.GetService(typeof(System.Xaml.IRootObjectProvider)) as System.Xaml.IRootObjectProvider;
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#region 如果是针对WinForm的ControlBinding
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if (valueProvider.TargetObject is System.Windows.Forms.Control && rootObjProvider != null)
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{
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System.Windows.Forms.Control ctl = valueProvider.TargetObject as System.Windows.Forms.Control;
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System.Windows.Forms.Binding b = new System.Windows.Forms.Binding((valueProvider.TargetProperty as PropertyInfo).Name, rootObjProvider.RootObject, Path.Path);
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if (Mode == BindingMode.OneWay)
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{
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b.ControlUpdateMode = System.Windows.Forms.ControlUpdateMode.OnPropertyChanged;
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b.DataSourceUpdateMode = System.Windows.Forms.DataSourceUpdateMode.Never;
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}
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else if (Mode == BindingMode.OneWayToSource)
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{
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b.ControlUpdateMode = System.Windows.Forms.ControlUpdateMode.Never;
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if (UpdateSourceTrigger == System.Windows.Data.UpdateSourceTrigger.PropertyChanged
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|| UpdateSourceTrigger == System.Windows.Data.UpdateSourceTrigger.Default)
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b.DataSourceUpdateMode = System.Windows.Forms.DataSourceUpdateMode.OnPropertyChanged;
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else if (UpdateSourceTrigger == System.Windows.Data.UpdateSourceTrigger.LostFocus)
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b.DataSourceUpdateMode = System.Windows.Forms.DataSourceUpdateMode.OnValidation;
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}
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else if (Mode == BindingMode.TwoWay || Mode == BindingMode.Default)
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{
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b.ControlUpdateMode = System.Windows.Forms.ControlUpdateMode.OnPropertyChanged;
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b.DataSourceUpdateMode = System.Windows.Forms.DataSourceUpdateMode.OnPropertyChanged;
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}
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else if (Mode == BindingMode.OneTime)
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{
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//这里应该赋值一次:OneTime
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//......
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b.ControlUpdateMode = System.Windows.Forms.ControlUpdateMode.Never;
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b.DataSourceUpdateMode = System.Windows.Forms.DataSourceUpdateMode.Never;
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}
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ctl.DataBindings.Add(b);
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return null;
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}
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#endregion
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var bindingTarget = valueProvider.TargetObject as DependencyObject;
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var bindingProperty = valueProvider.TargetProperty as DependencyProperty;
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if (bindingProperty == null)
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return null;
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#region 使用代理Binding返回最终的值
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//得到Binding对象
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Binding binding = GetBinding(rootObjProvider == null ? null : rootObjProvider.RootObject);
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if (binding == null) return null;
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object retValue = binding.ProvideValue(serviceProvider);
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#endregion
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return retValue;
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}
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}
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[ContentProperty("Bindings")]
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public class ControlMultiBinding : MarkupExtension
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{
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#region Properties
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public Collection<ControlBinding> Bindings { get; private set; }
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public IMultiValueConverter Converter { get; set; }
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[DefaultValue("")]
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[TypeConverter(typeof(CultureInfoIetfLanguageTagConverter))]
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public CultureInfo ConverterCulture { get; set; }
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[DefaultValue("")]
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public object ConverterParameter { get; set; }
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public BindingMode Mode { get; set; }
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[DefaultValue(false)]
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public bool NotifyOnSourceUpdated { get; set; }
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[DefaultValue(false)]
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public bool NotifyOnTargetUpdated { get; set; }
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[DefaultValue(false)]
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public bool NotifyOnValidationError { get; set; }
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[DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
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public UpdateSourceExceptionFilterCallback UpdateSourceExceptionFilter { get; set; }
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public UpdateSourceTrigger UpdateSourceTrigger { get; set; }
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[DefaultValue(false)]
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public bool ValidatesOnDataErrors { get; set; }
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[DefaultValue(false)]
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public bool ValidatesOnExceptions { get; set; }
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public Collection<ValidationRule> ValidationRules { get; private set; }
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#endregion
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public ControlMultiBinding()
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{
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Bindings = new Collection<ControlBinding>();
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ValidationRules = new Collection<ValidationRule>();
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Mode = BindingMode.Default;
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UpdateSourceTrigger = System.Windows.Data.UpdateSourceTrigger.Default;
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}
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/// <summary>
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/// 获取代理MultiBindings对象
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/// </summary>
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/// <returns></returns>
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internal MultiBinding GetMultiBindings(object rootObject)
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{
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MultiBinding multiBindings = new MultiBinding();
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if (this.Converter != null)
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multiBindings.Converter = this.Converter;
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if (this.ConverterCulture != null)
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multiBindings.ConverterCulture = this.ConverterCulture;
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if (this.ConverterParameter != null)
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multiBindings.ConverterParameter = this.ConverterParameter;
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if (this.UpdateSourceExceptionFilter != null)
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multiBindings.UpdateSourceExceptionFilter = this.UpdateSourceExceptionFilter;
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multiBindings.Mode = this.Mode;
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multiBindings.NotifyOnSourceUpdated = this.NotifyOnSourceUpdated;
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multiBindings.NotifyOnTargetUpdated = this.NotifyOnTargetUpdated;
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multiBindings.NotifyOnValidationError = this.NotifyOnValidationError;
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multiBindings.UpdateSourceTrigger = this.UpdateSourceTrigger;
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multiBindings.ValidatesOnDataErrors = this.ValidatesOnDataErrors;
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multiBindings.ValidatesOnExceptions = this.ValidatesOnExceptions;
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foreach (object bd in Bindings)
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{
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if (bd is BindingBase)
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multiBindings.Bindings.Add(bd as BindingBase);
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else if (bd is ControlBinding)
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multiBindings.Bindings.Add((bd as ControlBinding).GetBinding(rootObject) as BindingBase);
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}
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foreach (ValidationRule vr in ValidationRules)
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multiBindings.ValidationRules.Add(vr);
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return multiBindings;
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}
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public override object ProvideValue(System.IServiceProvider serviceProvider)
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{
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var valueProvider = serviceProvider.GetService(typeof(IProvideValueTarget)) as IProvideValueTarget;
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if (valueProvider == null)
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return null;
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var bindingTarget = valueProvider.TargetObject as DependencyObject;
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var bindingProperty = valueProvider.TargetProperty as DependencyProperty;
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if (bindingProperty == null)
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return null;
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//使用MultiBindings返回最终的值
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#region 使用代理Binding返回最终的值
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var rootObjProvider = serviceProvider.GetService(typeof(System.Xaml.IRootObjectProvider)) as System.Xaml.IRootObjectProvider;
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MultiBinding multiBindings = GetMultiBindings(rootObjProvider == null ? null : rootObjProvider.RootObject);
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if (multiBindings == null) return null;
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object retValue = multiBindings.ProvideValue(serviceProvider);
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#endregion
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return retValue;
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}
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}
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}
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