Lasciate TextBox tratto di riempire larghezza in StackPanel

Question

Ho un StackPanel nel mio WinRT C# Metro app che voglio usare come contenitore per una coppia di etichetta/valore (TextBlock e TextBox) in questo modo:

<StackPanel Orientation="Horizontal" Width="400"> 
    <TextBlock Text="Label" Width="150" /> 
    <TextBox Text="Value" /> 
</StackPanel> 

Ora quello che voglio è lasciare che il TextBox riempia automaticamente lo spazio orizzontale rimanente dello StackPanel. È possibile in qualche modo? HorizontalAlignment/HorizontalContentAlignment non funzionano.

So che un'alternativa sarebbe quella di definire un Grid per quello. Il problema è che ho questo costrutto più volte e voglio usarlo in una definizione Style. Non voglio definire la definizione della griglia con righe e colonne x volte ...

Forse l'alternativa sarebbe quella di definire un controllo utente personalizzato, ma speravo che ci sarebbe stata una facile possibilità di allungare lo .

Answer 1

Sfortunatamente l'alternativa (DockPanel) non è disponibile per Metro. Potresti provare un WrapGrid, ma non so se risolverà il tuo problema (non l'ho mai usato).

L'unico vero modo di fare questo sta usando una griglia come hai descritto:

<Grid Width="400"> 
    <Grid.ColumnDefinitions> 
     <ColumnDefinition Width="Auto" /> 
     <ColumnDefinition /> 
    </Grid.ColumnDefinitions> 
    <TextBlock Text="Label" Width="150" /> 
    <TextBox Text="Value" Grid.Column="1" /> 
</Grid> 

Answer 2

sono imbattuto in questa domanda durante la ricerca se un WinRT DockPanel esistito.

Ho finito per modificare leggermente il DockPanel fornito con Silverlight Toolkit e sembra funzionare.

Per utilizzare, aggiungere xmlns:toolkit="using:System.Windows.Controls" verso l'alto, e prendendo la questione di cui sopra come lo scenario, potremmo scrivere:

<toolkit:DockPanel Width="400"> 
    <TextBlock Text="Label" Width="150" toolkit:DockPanel.Dock="Left" /> 
    <TextBox Text="Value" /> 
</toolkit:DockPanel> 

DockPanel.cs:

// (c) Copyright Microsoft Corporation. 
// This source is subject to the Microsoft Public License (Ms-PL). 
// Please see http://go.microsoft.com/fwlink/?LinkID=131993 for details. 
// All other rights reserved. 

// Modified slightly for Windows Runtime support. 

using System; 
using System.Collections.Generic; 
using System.Diagnostics.CodeAnalysis; 
using System.Globalization; 
using System.IO; 
using System.Linq; 
using Windows.Foundation; 
using Windows.Foundation.Collections; 
using Windows.UI.Xaml; 
using Windows.UI.Xaml.Controls; 
using Windows.UI.Xaml.Controls.Primitives; 
using Windows.UI.Xaml.Data; 
using Windows.UI.Xaml.Input; 
using Windows.UI.Xaml.Media; 
using Windows.UI.Xaml.Navigation; 

namespace System.Windows.Controls 
{ 
    public enum Dock 
    { 
     // Summary: 
     //  Specifies that the control should be positioned on the left of the control. 
     Left = 0, 
     // 
     // Summary: 
     //  Specifies that the control should be positioned on top of the control. 
     Top = 1, 
     // 
     // Summary: 
     //  Specifies that the control should be positioned on the right of the control. 
     Right = 2, 
     // 
     // Summary: 
     //  Specifies that the control should be positioned at the bottom of the control. 
     Bottom = 3, 
    } 

    /// <summary> 
    /// Arranges child elements around the edges of the panel. Optionally, 
    /// last added child element can occupy the remaining space. 
    /// </summary> 
    /// <QualityBand>Stable</QualityBand> 
    public class DockPanel : Panel 
    { 
     /// <summary> 
     /// A value indicating whether a dependency property change handler 
     /// should ignore the next change notification. This is used to reset 
     /// the value of properties without performing any of the actions in 
     /// their change handlers. 
     /// </summary> 
     private static bool _ignorePropertyChange; 

     #region public bool LastChildFill 
     /// <summary> 
     /// Gets or sets a value indicating whether the last child element 
     /// added to a <see cref="T:System.Windows.Controls.DockPanel" /> 
     /// resizes to fill the remaining space. 
     /// </summary> 
     /// <value> 
     /// True if the last element added resizes to fill the remaining space, 
     /// false to indicate the last element does not resize. The default is 
     /// true. 
     /// </value> 
     public bool LastChildFill 
     { 
      get { return (bool)GetValue(LastChildFillProperty); } 
      set { SetValue(LastChildFillProperty, value); } 
     } 

     /// <summary> 
     /// Identifies the 
     /// <see cref="P:System.Windows.Controls.DockPanel.LastChildFill" /> 
     /// dependency property. 
     /// </summary> 
     public static readonly DependencyProperty LastChildFillProperty = 
      DependencyProperty.Register(
       "LastChildFill", 
       typeof(bool), 
       typeof(DockPanel), 
       new PropertyMetadata(true, OnLastChildFillPropertyChanged)); 

     /// <summary> 
     /// LastChildFillProperty property changed handler. 
     /// </summary> 
     /// <param name="d">DockPanel that changed its LastChildFill.</param> 
     /// <param name="e">Event arguments.</param> 
     private static void OnLastChildFillPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) 
     { 
      DockPanel source = d as DockPanel; 
      source.InvalidateArrange(); 
     } 
     #endregion public bool LastChildFill 

     #region public attached Dock Dock 
     /// <summary> 
     /// Gets the value of the 
     /// <see cref="P:System.Windows.Controls.DockPanel.Dock" /> attached 
     /// property for the specified element. 
     /// </summary> 
     /// <param name="element"> 
     /// The element from which the property value is read. 
     /// </param> 
     /// <returns> 
     /// The <see cref="P:System.Windows.Controls.DockPanel.Dock" /> property 
     /// value for the element. 
     /// </returns> 
     [SuppressMessage("Microsoft.Design", "CA1011:ConsiderPassingBaseTypesAsParameters", Justification = "DockPanel only has UIElement children")] 
     public static Dock GetDock(UIElement element) 
     { 
      if (element == null) 
      { 
       throw new ArgumentNullException("element"); 
      } 
      return (Dock)element.GetValue(DockProperty); 
     } 

     /// <summary> 
     /// Sets the value of the 
     /// <see cref="P:System.Windows.Controls.DockPanel.Dock" /> attached 
     /// property for the specified element to the specified dock value. 
     /// </summary> 
     /// <param name="element"> 
     /// The element to which the attached property is assigned. 
     /// </param> 
     /// <param name="dock"> 
     /// The dock value to assign to the specified element. 
     /// </param> 
     [SuppressMessage("Microsoft.Design", "CA1011:ConsiderPassingBaseTypesAsParameters", Justification = "DockPanel only has UIElement children")] 
     public static void SetDock(UIElement element, Dock dock) 
     { 
      if (element == null) 
      { 
       throw new ArgumentNullException("element"); 
      } 
      element.SetValue(DockProperty, dock); 
     } 

     /// <summary> 
     /// Identifies the 
     /// <see cref="P:System.Windows.Controls.DockPanel.Dock" /> 
     /// attached property. 
     /// </summary> 
     public static readonly DependencyProperty DockProperty = 
      DependencyProperty.RegisterAttached(
       "Dock", 
       typeof(Dock), 
       typeof(DockPanel), 
       new PropertyMetadata(Dock.Left, OnDockPropertyChanged)); 

     /// <summary> 
     /// DockProperty property changed handler. 
     /// </summary> 
     /// <param name="d">UIElement that changed its Dock.</param> 
     /// <param name="e">Event arguments.</param> 
     [SuppressMessage("Microsoft.Usage", "CA2208:InstantiateArgumentExceptionsCorrectly", Justification = "Almost always set from the attached property CLR setter.")] 
     private static void OnDockPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) 
     { 
      // Ignore the change if requested 
      if (_ignorePropertyChange) 
      { 
       _ignorePropertyChange = false; 
       return; 
      } 

      UIElement element = (UIElement)d; 
      Dock value = (Dock)e.NewValue; 

      // Validate the Dock property 
      if ((value != Dock.Left) && 
       (value != Dock.Top) && 
       (value != Dock.Right) && 
       (value != Dock.Bottom)) 
      { 
       // Reset the property to its original state before throwing 
       _ignorePropertyChange = true; 
       element.SetValue(DockProperty, (Dock)e.OldValue); 

       string message = string.Format(
        CultureInfo.InvariantCulture, 
        "InvalidValue", 
        value); 
       throw new ArgumentException(message, "value"); 
      } 

      // Cause the DockPanel to update its layout when a child changes 
      DockPanel panel = VisualTreeHelper.GetParent(element) as DockPanel; 
      if (panel != null) 
      { 
       panel.InvalidateMeasure(); 
      } 
     } 
     #endregion public attached Dock Dock 

     /// <summary> 
     /// Initializes a new instance of the 
     /// <see cref="T:System.Windows.Controls.DockPanel" /> class. 
     /// </summary> 
     public DockPanel() 
     { 
     } 

     /// <summary> 
     /// Measures the child elements of a 
     /// <see cref="T:System.Windows.Controls.DockPanel" /> in preparation 
     /// for arranging them during the 
     /// <see cref="M:System.Windows.Controls.DockPanel.ArrangeOverride(System.Windows.Size)" /> 
     /// pass. 
     /// </summary> 
     /// <param name="constraint"> 
     /// The area available to the 
     /// <see cref="T:System.Windows.Controls.DockPanel" />. 
     /// </param> 
     /// <returns> 
     /// The desired size of the 
     /// <see cref="T:System.Windows.Controls.DockPanel" />. 
     /// </returns> 
     [SuppressMessage("Microsoft.Naming", "CA1725:ParameterNamesShouldMatchBaseDeclaration", MessageId = "0#", Justification = "Compat with WPF.")] 
     protected override Size MeasureOverride(Size constraint) 
     { 
      double usedWidth = 0.0; 
      double usedHeight = 0.0; 
      double maximumWidth = 0.0; 
      double maximumHeight = 0.0; 

      // Measure each of the Children 
      foreach (UIElement element in Children) 
      { 
       // Get the child's desired size 
       Size remainingSize = new Size(
        Math.Max(0.0, constraint.Width - usedWidth), 
        Math.Max(0.0, constraint.Height - usedHeight)); 
       element.Measure(remainingSize); 
       Size desiredSize = element.DesiredSize; 

       // Decrease the remaining space for the rest of the children 
       switch (GetDock(element)) 
       { 
        case Dock.Left: 
        case Dock.Right: 
         maximumHeight = Math.Max(maximumHeight, usedHeight + desiredSize.Height); 
         usedWidth += desiredSize.Width; 
         break; 
        case Dock.Top: 
        case Dock.Bottom: 
         maximumWidth = Math.Max(maximumWidth, usedWidth + desiredSize.Width); 
         usedHeight += desiredSize.Height; 
         break; 
       } 
      } 

      maximumWidth = Math.Max(maximumWidth, usedWidth); 
      maximumHeight = Math.Max(maximumHeight, usedHeight); 
      return new Size(maximumWidth, maximumHeight); 
     } 

     /// <summary> 
     /// Arranges the child elements of the 
     /// <see cref="T:System.Windows.Controls.DockPanel" /> control. 
     /// </summary> 
     /// <param name="arrangeSize"> 
     /// The area in the parent element that the 
     /// <see cref="T:System.Windows.Controls.DockPanel" /> should use to 
     /// arrange its child elements. 
     /// </param> 
     /// <returns> 
     /// The actual size of the 
     /// <see cref="T:System.Windows.Controls.DockPanel" /> after the child 
     /// elements are arranged. The actual size should always equal 
     /// <paramref name="arrangeSize" />. 
     /// </returns> 
     [SuppressMessage("Microsoft.Naming", "CA1725:ParameterNamesShouldMatchBaseDeclaration", MessageId = "0#", Justification = "Compat with WPF.")] 
     protected override Size ArrangeOverride(Size arrangeSize) 
     { 
      double left = 0.0; 
      double top = 0.0; 
      double right = 0.0; 
      double bottom = 0.0; 

      // Arrange each of the Children 
      UIElementCollection children = Children; 
      int dockedCount = children.Count - (LastChildFill ? 1 : 0); 
      int index = 0; 
      foreach (UIElement element in children) 
      { 
       // Determine the remaining space left to arrange the element 
       Rect remainingRect = new Rect(
        left, 
        top, 
        Math.Max(0.0, arrangeSize.Width - left - right), 
        Math.Max(0.0, arrangeSize.Height - top - bottom)); 

       // Trim the remaining Rect to the docked size of the element 
       // (unless the element should fill the remaining space because 
       // of LastChildFill) 
       if (index < dockedCount) 
       { 
        Size desiredSize = element.DesiredSize; 
        switch (GetDock(element)) 
        { 
         case Dock.Left: 
          left += desiredSize.Width; 
          remainingRect.Width = desiredSize.Width; 
          break; 
         case Dock.Top: 
          top += desiredSize.Height; 
          remainingRect.Height = desiredSize.Height; 
          break; 
         case Dock.Right: 
          right += desiredSize.Width; 
          remainingRect.X = Math.Max(0.0, arrangeSize.Width - right); 
          remainingRect.Width = desiredSize.Width; 
          break; 
         case Dock.Bottom: 
          bottom += desiredSize.Height; 
          remainingRect.Y = Math.Max(0.0, arrangeSize.Height - bottom); 
          remainingRect.Height = desiredSize.Height; 
          break; 
        } 
       } 

       element.Arrange(remainingRect); 
       index++; 
      } 

      return arrangeSize; 
     } 
    } 
} 

Answer 3

Non sono sicuro quale elemento si mette a HorizontalAlignment, ma questo è ciò che funziona per me:

<StackPanel> 
    <TextBlock Text="Title" Style="..."/> 
    <TextBlock Margin="0,0,0,10" Text="Description" Style="..."/> 
    <TextBox HorizontalAlignment="Stretch" /> 
    <Button Margin="0" Content="Save"/> 
</StackPanel> 

questo estende lo TextBox all'intera larghezza dello StackPanel.

Answer 4

Ho camminato attraverso questo deserto per 10 minuti o ore, e capito che il miglior controllo nativo per NEast il contenuto è l'aspetto della griglia al mio snipet che funziona bene:

<Grid > 
    <TextBox x:Name="txtCountry" Margin="0,8,41,8" /> 
    <Button x:Name="btnGetCountry" Content="..." Margin="0,8,0,8" HorizontalAlignment="Right" Click="btnGetCountry_Click"> </Button> 
</Grid> 

Questo genererà un bel layout adattabile con una steching di textbox e un butoon su di esso che mantiene il suo aspetto