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Merge pull request dotMorten#2 from MagooChris/master
Added InverseTrigger and matching sample (by MagooChris)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,114 @@ | ||
| <UserControl x:Class="TestApp.Samples.InverseSample" | ||
| xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" | ||
| xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" | ||
| xmlns:local="using:TestApp.Samples" | ||
| xmlns:d="http://schemas.microsoft.com/expression/blend/2008" | ||
| xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" | ||
| xmlns:triggers="using:WindowsStateTriggers" | ||
| mc:Ignorable="d"> | ||
| <Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}"> | ||
| <VisualStateManager.VisualStateGroups> | ||
| <VisualStateGroup x:Name="textboxstates"> | ||
| <VisualState x:Name="textboxnotemptystate"> | ||
| <VisualState.StateTriggers> | ||
| <triggers:InverseTrigger> | ||
| <triggers:InverseTrigger.StateTrigger> | ||
| <triggers:IsNullOrEmptyStateTrigger Value="{x:Bind textbox.Text, Mode=OneWay}" /> | ||
| </triggers:InverseTrigger.StateTrigger> | ||
| </triggers:InverseTrigger> | ||
| </VisualState.StateTriggers> | ||
| <VisualState.Setters> | ||
| <Setter Target="textbox.BorderBrush" | ||
| Value="Green" /> | ||
| </VisualState.Setters> | ||
| </VisualState> | ||
| <VisualState x:Name="textboxemptystate"> | ||
| <VisualState.StateTriggers> | ||
| <triggers:IsNullOrEmptyStateTrigger Value="{x:Bind textbox.Text, Mode=OneWay}" /> | ||
| </VisualState.StateTriggers> | ||
| <VisualState.Setters> | ||
| <Setter Target="textbox.Background" | ||
| Value="BlanchedAlmond" /> | ||
| <Setter Target="textbox.BorderBrush" | ||
| Value="Red" /> | ||
| <Setter Target="textboxError.Visibility" | ||
| Value="Visible" /> | ||
| </VisualState.Setters> | ||
| </VisualState> | ||
| </VisualStateGroup> | ||
| <VisualStateGroup x:Name="listboxstates"> | ||
| <VisualState x:Name="listnotemptystate"> | ||
| <VisualState.StateTriggers> | ||
| <triggers:InverseTrigger> | ||
| <triggers:InverseTrigger.StateTrigger> | ||
| <triggers:IsNullOrEmptyStateTrigger Value="{x:Bind list.Items, Mode=OneWay}" /> | ||
| </triggers:InverseTrigger.StateTrigger> | ||
| </triggers:InverseTrigger> | ||
| </VisualState.StateTriggers> | ||
| <VisualState.Setters> | ||
| <Setter Target="list.Visibility" | ||
| Value="Visible" /> | ||
| </VisualState.Setters> | ||
| </VisualState> | ||
| <VisualState x:Name="listemptystate"> | ||
| <VisualState.StateTriggers> | ||
| <triggers:IsNullOrEmptyStateTrigger Value="{x:Bind list.Items, Mode=OneWay}" /> | ||
| </VisualState.StateTriggers> | ||
| <VisualState.Setters> | ||
| <Setter Target="remove.IsEnabled" | ||
| Value="False" /> | ||
| <Setter Target="listEmptyMessage.Visibility" | ||
| Value="Visible" /> | ||
| </VisualState.Setters> | ||
| </VisualState> | ||
| </VisualStateGroup> | ||
| </VisualStateManager.VisualStateGroups> | ||
| <StackPanel VerticalAlignment="Center"> | ||
| <TextBlock Text="The TextBox will be green if not empty." /> | ||
| <StackPanel Orientation="Horizontal" | ||
| Margin="0 0 0 20"> | ||
| <TextBox x:Name="textbox" | ||
| Text="" | ||
| Width="200" /> | ||
| <TextBlock x:Name="textboxError" | ||
| Text="* Required" | ||
| Foreground="Red" | ||
| Margin="10 0 0 0" | ||
| Visibility="Collapsed" /> | ||
| </StackPanel> | ||
| <StackPanel Orientation="Horizontal"> | ||
| <Button x:Name="add" | ||
| Content="Add" | ||
| Margin="0 0 10 0" | ||
| Click="add_Click" /> | ||
| <Button x:Name="remove" | ||
| Content="Remove" | ||
| Click="remove_Click" /> | ||
| </StackPanel> | ||
| <TextBlock x:Name="listEmptyMessage" | ||
| Text="List is empty, add some items" | ||
| Visibility="Collapsed" /> | ||
| <ListBox x:Name="list" | ||
| HorizontalAlignment="Left" | ||
| Visibility="Collapsed"> | ||
| <ListBox.ItemsPanel> | ||
| <ItemsPanelTemplate> | ||
| <StackPanel Orientation="Horizontal" /> | ||
| </ItemsPanelTemplate> | ||
| </ListBox.ItemsPanel> | ||
| <ListBox.ItemContainerStyle> | ||
| <Style TargetType="ListBoxItem"> | ||
| <Setter Property="Padding" | ||
| Value="3" /> | ||
| <Setter Property="Margin" | ||
| Value="3" /> | ||
| <Setter Property="Background" | ||
| Value="Red" /> | ||
| <Setter Property="Foreground" | ||
| Value="White" /> | ||
| </Style> | ||
| </ListBox.ItemContainerStyle> | ||
| </ListBox> | ||
| </StackPanel> | ||
| </Grid> | ||
| </UserControl> |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,31 @@ | ||
| using System; | ||
| using System.Collections.Generic; | ||
| using System.Linq; | ||
| using Windows.UI.Xaml; | ||
| using Windows.UI.Xaml.Controls; | ||
|
|
||
| // The Blank Page item template is documented at http://go.microsoft.com/fwlink/?LinkId=234238 | ||
|
|
||
| namespace TestApp.Samples | ||
| { | ||
| /// <summary> | ||
| /// An empty page that can be used on its own or navigated to within a Frame. | ||
| /// </summary> | ||
| public sealed partial class InverseSample : UserControl | ||
| { | ||
| public InverseSample() | ||
| { | ||
| this.InitializeComponent(); | ||
| } | ||
|
|
||
| private void add_Click(object sender, RoutedEventArgs e) | ||
| { | ||
| list.Items.Add("Item"); | ||
| } | ||
|
|
||
| private void remove_Click(object sender, RoutedEventArgs e) | ||
| { | ||
| list.Items.RemoveAt(0); | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,81 @@ | ||
| // Copyright (c) Morten Nielsen. All rights reserved. | ||
| // Licensed under the MIT license. See LICENSE file in the project root for full license information. | ||
|
|
||
| using System; | ||
| using System.Collections.Generic; | ||
| using System.Linq; | ||
| using Windows.UI.Xaml; | ||
|
|
||
| namespace WindowsStateTriggers | ||
| { | ||
| /// <summary> | ||
| /// Inverts another State Trigger that is using ITriggerValue | ||
| /// </summary> | ||
| public class InverseTrigger : StateTriggerBase, ITriggerValue | ||
| { | ||
| /// <summary> | ||
| /// Gets or sets the State Trigger to invert. | ||
| /// </summary> | ||
| public ITriggerValue StateTrigger | ||
| { | ||
| get { return (ITriggerValue)GetValue(StateTriggerProperty); } | ||
| set { SetValue(StateTriggerProperty, value); } | ||
| } | ||
|
|
||
| /// <summary> | ||
| /// Identifies the <see cref="StateTrigger"/> DependencyProperty | ||
| /// </summary> | ||
| public static readonly DependencyProperty StateTriggerProperty = | ||
| DependencyProperty.Register("StateTrigger", typeof(ITriggerValue), typeof(InverseTrigger), | ||
| new PropertyMetadata(null, OnStateTriggerPropertyChanged)); | ||
|
|
||
| private static void OnStateTriggerPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) | ||
| { | ||
| var obj = (InverseTrigger)d; | ||
| var val = (ITriggerValue)e.NewValue; | ||
| if (val != null) | ||
| { | ||
| obj.IsActive = !val.IsActive; | ||
| WeakEventListener<ITriggerValue, object, EventArgs> weakEvent = new WeakEventListener<ITriggerValue, object, EventArgs>(val) | ||
| { | ||
| OnEventAction = (instance, source, args) => obj.IsActive = !instance.IsActive, | ||
| OnDetachAction = (instance, weakEventListener) => instance.IsActiveChanged -= weakEventListener.OnEvent | ||
| }; | ||
| val.IsActiveChanged += weakEvent.OnEvent; | ||
| } | ||
| else | ||
| { | ||
| obj.IsActive = false; | ||
| } | ||
| } | ||
| #region ITriggerValue | ||
|
|
||
| private bool m_IsActive; | ||
|
|
||
| /// <summary> | ||
| /// Gets a value indicating whether this trigger is active. | ||
| /// </summary> | ||
| /// <value><c>true</c> if this trigger is active; otherwise, <c>false</c>.</value> | ||
| public bool IsActive | ||
| { | ||
| get { return m_IsActive; } | ||
| private set | ||
| { | ||
| if (m_IsActive != value) | ||
| { | ||
| m_IsActive = value; | ||
| base.SetActive(value); | ||
| if (IsActiveChanged != null) | ||
| IsActiveChanged(this, EventArgs.Empty); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| /// <summary> | ||
| /// Occurs when the <see cref="IsActive" /> property has changed. | ||
| /// </summary> | ||
| public event EventHandler IsActiveChanged; | ||
|
|
||
| #endregion ITriggerValue | ||
| } | ||
| } |
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