mirror of https://github.com/icsharpcode/ILSpy.git
Daniel Grunwald
15 years ago
8 changed files with 17 additions and 218 deletions
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// Copyright (c) 2008 Jason Kemp
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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using System; |
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using System.Collections.Generic; |
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using System.ComponentModel; |
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using System.Windows; |
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using System.Windows.Controls; |
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using System.Windows.Controls.Primitives; |
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using System.Windows.Documents; |
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using System.Windows.Media; |
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namespace ICSharpCode.ILSpy |
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{ |
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/// <summary>
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/// Watermark for text boxes; from http://www.ageektrapped.com/blog/the-missing-net-4-cue-banner-in-wpf-i-mean-watermark-in-wpf/.
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/// </summary>
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public static class CueBannerService |
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{ |
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//there is absolutely no way to write this statement out
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//to look pretty
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public static readonly DependencyProperty CueBannerProperty = DependencyProperty.RegisterAttached( |
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"CueBanner", typeof (object), typeof (CueBannerService), |
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new FrameworkPropertyMetadata("", CueBannerPropertyChanged)); |
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public static object GetCueBanner(Control control) |
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{ |
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return control.GetValue(CueBannerProperty); |
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} |
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public static void SetCueBanner(Control control, object value) |
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{ |
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control.SetValue(CueBannerProperty, value); |
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} |
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private static void CueBannerPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) |
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{ |
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Control control = (Control)d; |
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control.Loaded += control_Loaded; |
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if (d is ComboBox || d is TextBox) |
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{ |
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control.GotFocus += control_GotFocus; |
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control.LostFocus += control_Loaded; |
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} |
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if (d is ItemsControl && !(d is ComboBox)) |
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{ |
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ItemsControl i = (ItemsControl) d; |
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//for Items property
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i.ItemContainerGenerator.ItemsChanged += ItemsChanged; |
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itemsControls.Add(i.ItemContainerGenerator, i); |
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//for ItemsSource property
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DependencyPropertyDescriptor prop = |
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DependencyPropertyDescriptor.FromProperty(ItemsControl.ItemsSourceProperty, i.GetType()); |
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prop.AddValueChanged(i, ItemsSourceChanged); |
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} |
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} |
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private static readonly Dictionary<object, ItemsControl> itemsControls = new Dictionary<object, ItemsControl>(); |
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private static void ItemsSourceChanged(object sender, EventArgs e) |
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{ |
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ItemsControl c = (ItemsControl)sender; |
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if (c.ItemsSource != null) |
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RemoveCueBanner(c); |
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else |
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ShowCueBanner(c); |
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} |
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private static void ItemsChanged(object sender, ItemsChangedEventArgs e) |
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{ |
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ItemsControl control; |
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if (itemsControls.TryGetValue(sender, out control)) |
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{ |
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if (e.ItemCount > 0) |
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RemoveCueBanner(control); |
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else |
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ShowCueBanner(control); |
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} |
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} |
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private static void control_GotFocus(object sender, RoutedEventArgs e) |
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{ |
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Control c = (Control)sender; |
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if (ShouldShowCueBanner(c)) |
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{ |
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RemoveCueBanner(c); |
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} |
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} |
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private static void control_Loaded(object sender, RoutedEventArgs e) |
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{ |
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Control control = (Control)sender; |
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if (ShouldShowCueBanner(control)) |
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{ |
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ShowCueBanner(control); |
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} |
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} |
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private static void RemoveCueBanner(UIElement control) |
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{ |
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AdornerLayer layer = AdornerLayer.GetAdornerLayer(control); |
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Adorner[] adorners = layer.GetAdorners(control); |
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if (adorners == null) return; |
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foreach (Adorner adorner in adorners) |
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{ |
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if (adorner is CueBannerAdorner) |
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{ |
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adorner.Visibility = Visibility.Hidden; |
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layer.Remove(adorner); |
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} |
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} |
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} |
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private static void ShowCueBanner(Control control) |
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{ |
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AdornerLayer layer = AdornerLayer.GetAdornerLayer(control); |
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layer.Add(new CueBannerAdorner(control, GetCueBanner(control))); |
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} |
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private static bool ShouldShowCueBanner(Control c) |
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{ |
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DependencyProperty dp = GetDependencyProperty(c); |
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if (dp == null) return true; |
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return c.GetValue(dp).Equals(""); |
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} |
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private static DependencyProperty GetDependencyProperty (Control control) |
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{ |
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if (control is ComboBox) |
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return ComboBox.TextProperty; |
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if (control is TextBoxBase) |
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return TextBox.TextProperty; |
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return null; |
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} |
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} |
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internal class CueBannerAdorner : Adorner |
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{ |
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private readonly ContentPresenter contentPresenter; |
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public CueBannerAdorner(UIElement adornedElement, object cueBanner) : |
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base(adornedElement) |
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{ |
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this.IsHitTestVisible = false; |
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contentPresenter = new ContentPresenter(); |
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contentPresenter.Content = cueBanner; |
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contentPresenter.Opacity = 0.7; |
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contentPresenter.Margin = |
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new Thickness(Control.Margin.Left + Control.Padding.Left, |
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Control.Margin.Top + Control.Padding.Top, 0, 0); |
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} |
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private Control Control |
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{ |
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get { return (Control) this.AdornedElement; } |
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} |
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protected override Visual GetVisualChild(int index) |
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{ |
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return contentPresenter; |
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} |
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protected override int VisualChildrenCount |
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{ |
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get { return 1; } |
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} |
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protected override Size MeasureOverride(Size constraint) |
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{ |
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contentPresenter.Measure(Control.RenderSize); |
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return Control.RenderSize; |
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} |
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protected override Size ArrangeOverride(Size finalSize) |
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{ |
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contentPresenter.Arrange(new Rect(finalSize)); |
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return finalSize; |
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} |
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} |
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} |
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