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ListBoxAssist.IsToggle - Ensure last clicked item is always selected #3349

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Merged
merged 2 commits into from
Oct 29, 2023
Merged

ListBoxAssist.IsToggle - Ensure last clicked item is always selected #3349

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bcfebb0
Ensures last clicked item is always selected
nicolaihenriksen Oct 27, 2023
08aaa54
Add attached property to allow toggling of selected item
nicolaihenriksen Oct 28, 2023
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4 changes: 2 additions & 2 deletions MainDemo.Wpf/Toggles.xaml
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Original file line number Diff line number Diff line change
Expand Up @@ -338,11 +338,11 @@

<smtx:XamlDisplay HorizontalAlignment="Left" UniqueKey="buttons_63">
<!-- the following based on https://material.io/guidelines/components/buttons.html#buttons-toggle-buttons -->
<ListBox SelectedIndex="0" Style="{StaticResource MaterialDesignToolVerticalToggleListBox}">
<ListBox SelectedIndex="0" Style="{StaticResource MaterialDesignToolVerticalToggleListBox}" materialDesign:ListBoxAssist.CanUserToggleSelectedItem="True">
<ListBox.ToolTip>
<StackPanel>
<TextBlock Text="MaterialDesignToolToggleListBox" />
<TextBlock Text="Exclusive selection" />
<TextBlock Text="Exclusive selection (allows un-toggling selected item)" />
<TextBlock Text="ListBoxAssist.IsToggle allows more natural toggle behaviour" />
</StackPanel>
</ListBox.ToolTip>
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4 changes: 2 additions & 2 deletions MaterialDesign3.Demo.Wpf/Toggles.xaml
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Original file line number Diff line number Diff line change
Expand Up @@ -336,11 +336,11 @@

<smtx:XamlDisplay HorizontalAlignment="Left" UniqueKey="buttons_63">
<!-- the following based on https://material.io/guidelines/components/buttons.html#buttons-toggle-buttons -->
<ListBox SelectedIndex="0" Style="{StaticResource MaterialDesignToolVerticalToggleListBox}">
<ListBox SelectedIndex="0" Style="{StaticResource MaterialDesignToolVerticalToggleListBox}" materialDesign:ListBoxAssist.CanUserToggleSelectedItem="True">
<ListBox.ToolTip>
<StackPanel>
<TextBlock Text="MaterialDesignToolToggleListBox" />
<TextBlock Text="Exclusive selection" />
<TextBlock Text="Exclusive selection (allows un-toggling selected item)" />
<TextBlock Text="ListBoxAssist.IsToggle allows more natural toggle behaviour" />
</StackPanel>
</ListBox.ToolTip>
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11 changes: 10 additions & 1 deletion MaterialDesignThemes.Wpf/ListBoxAssist.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -32,7 +32,7 @@ private static void ListBoxMouseButtonEvent(object sender, MouseButtonEventArgs

if (listBoxItem is null || !listBoxItem.IsEnabled) return;

listBoxItem.SetCurrentValue(ListBoxItem.IsSelectedProperty, !listBoxItem.IsSelected);
listBoxItem.SetCurrentValue(ListBoxItem.IsSelectedProperty, !GetCanUserToggleSelectedItem(senderElement) || !listBoxItem.IsSelected);
mouseButtonEventArgs.Handled = true;

listBoxItem.Focus();
Expand All @@ -55,4 +55,13 @@ public static void SetIsToggle(DependencyObject element, bool value)

public static bool GetIsToggle(DependencyObject element)
=> (bool)element.GetValue(IsToggleProperty);

public static readonly DependencyProperty CanUserToggleSelectedItemProperty = DependencyProperty.RegisterAttached(
"CanUserToggleSelectedItem", typeof(bool), typeof(ListBoxAssist), new FrameworkPropertyMetadata(default(bool)));

public static void SetCanUserToggleSelectedItem(DependencyObject element, bool value)
=> element.SetValue(CanUserToggleSelectedItemProperty, value);

public static bool GetCanUserToggleSelectedItem(DependencyObject element)
=> (bool)element.GetValue(CanUserToggleSelectedItemProperty);
}