Laissez TextBox s'étirer pour remplir la largeur dans StackPanel
J'ai une StackPanel dans mon application WinRT C # Metro que je veux utiliser comme conteneur pour une paire étiquette/valeur (TextBlock et TextBox) comme ceci:
<StackPanel Orientation="Horizontal" Width="400">
<TextBlock Text="Label" Width="150" />
<TextBox Text="Value" />
</StackPanel>
Maintenant, ce que je veux, c'est de laisser le TextBox remplir automatiquement l'espace horizontal restant du StackPanel. Est-ce possible d'une manière ou d'une autre? HorizontalAlignment/HorizontalContentAlignment ne fonctionne pas.
Je sais qu'une alternative serait de définir un Grid pour cela. Le problème est que j'ai cette construction plusieurs fois et que je veux l'utiliser dans une définition Style. Je ne veux pas définir la définition de la grille avec des lignes et des colonnes x fois ...
Peut-être que l'alternative serait de définir un contrôle utilisateur personnalisé, mais j'espérais qu'il y aurait une possibilité facile de faire étirer le TextBox.
Malheureusement, l'alternative (DockPanel) n'est pas disponible pour Metro. Vous pouvez essayer un WrapGrid, mais je ne sais pas si cela résoudra votre problème (je ne l'ai jamais utilisé).
La seule véritable façon de procéder consiste à utiliser une grille comme vous l'avez décrit:
<Grid Width="400">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto" />
<ColumnDefinition />
</Grid.ColumnDefinitions>
<TextBlock Text="Label" Width="150" />
<TextBox Text="Value" Grid.Column="1" />
</Grid>
Je ne sais pas à quel élément vous mettez HorizontalAlignment, mais c'est ce qui fonctionne pour moi:
<StackPanel>
<TextBlock Text="Title" Style="..."/>
<TextBlock Margin="0,0,0,10" Text="Description" Style="..."/>
<TextBox HorizontalAlignment="Stretch" />
<Button Margin="0" Content="Save"/>
</StackPanel>
Cela étend le TextBox à toute la largeur du StackPanel.
Je suis tombé sur cette question tout en recherchant s'il existait un DockPanel WinRT.
J'ai fini par modifier légèrement le DockPanel fourni avec le Silverlight Toolkit, et cela semble fonctionner.
Pour utiliser, ajoutez xmlns:toolkit="using:System.Windows.Controls" en haut, et en prenant la question ci-dessus comme scénario, nous pourrions écrire:
<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;
}
}
}
J'ai marché dans ce désert pendant 10 minutes ou heures, et j'ai compris que le meilleur contrôle natif pour nettoyer le contenu est la grille de mon snipet qui fonctionne bien:
<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>
cela générera une mise en page adaptable de Nice avec une zone de texte steching et un butoon sur le côté qui conserve son aspect