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ButchersBoyButchersBoy
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Merge pull request #127 from l1pton17/FixVirtualizingComboBox
Change ComboBox to fix #120 ....many thanks @l1pton17
2 parents ae4502b + 12f753b commit e3ab0d4

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-412
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6 files changed

+660
-412
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‎MainDemo.Wpf/TextFields.xaml

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@@ -162,7 +162,6 @@
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</ComboBox>
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</StackPanel>
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<TextBox Grid.Row="4" Grid.Column="1" wpf:TextFieldAssist.Hint="Floating Hint" Style="{StaticResource MaterialDesignFloatingHintTextBox}" Text="Good stuff"
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Margin="0 8 0 8"/>
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<ComboBox Grid.Row="4" Grid.Column="3" wpf:TextFieldAssist.Hint="Search" IsEditable="True" Style="{StaticResource MaterialDesignFloatingHintComboBox}"

‎MaterialDesignThemes.Wpf/ComboBoxPopup.cs

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using System;
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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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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namespace MaterialDesignThemes.Wpf
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{
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public class ComboBoxPopup : Popup
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{
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public static readonly DependencyProperty UpContentTemplateProperty
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= DependencyProperty.Register(nameof(UpContentTemplateProperty),
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typeof(ControlTemplate),
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typeof(ComboBoxPopup),
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new UIPropertyMetadata(null));
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public ControlTemplate UpContentTemplate
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{
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get { return (ControlTemplate)GetValue(UpContentTemplateProperty); }
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set { SetValue(UpContentTemplateProperty, value); }
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}
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public static readonly DependencyProperty DownContentTemplateProperty
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= DependencyProperty.Register(nameof(DownContentTemplateProperty),
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typeof(ControlTemplate),
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typeof(ComboBoxPopup),
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new UIPropertyMetadata(null));
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public ControlTemplate DownContentTemplate
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{
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get { return (ControlTemplate)GetValue(DownContentTemplateProperty); }
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set { SetValue(DownContentTemplateProperty, value); }
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}
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public static readonly DependencyProperty DefaultContentTemplateProperty
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= DependencyProperty.Register(nameof(DefaultContentTemplateProperty),
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typeof(ControlTemplate),
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typeof(ComboBoxPopup),
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new UIPropertyMetadata(null));
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public ControlTemplate DefaultContentTemplate
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{
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get { return (ControlTemplate)GetValue(DefaultContentTemplateProperty); }
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set { SetValue(DefaultContentTemplateProperty, value); }
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}
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public static readonly DependencyProperty UpVerticalOffsetProperty
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= DependencyProperty.Register(nameof(UpVerticalOffsetProperty),
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typeof(double),
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typeof(ComboBoxPopup),
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new PropertyMetadata(0.0));
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public double UpVerticalOffset
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{
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get { return (double)GetValue(UpVerticalOffsetProperty); }
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set { SetValue(UpVerticalOffsetProperty, value); }
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}
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public static readonly DependencyProperty DownVerticalOffsetProperty
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= DependencyProperty.Register(nameof(DownVerticalOffsetProperty),
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typeof(double),
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typeof(ComboBoxPopup),
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new PropertyMetadata(0.0));
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public double DownVerticalOffset
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{
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get { return (double)GetValue(DownVerticalOffsetProperty); }
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set { SetValue(DownVerticalOffsetProperty, value); }
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}
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public static readonly DependencyProperty DefaultVerticalOffsetProperty
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= DependencyProperty.Register(nameof(DefaultVerticalOffsetProperty),
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typeof(double),
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typeof(ComboBoxPopup),
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new PropertyMetadata(0.0));
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public double DefaultVerticalOffset
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{
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get { return (double)GetValue(DefaultVerticalOffsetProperty); }
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set { SetValue(DefaultVerticalOffsetProperty, value); }
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}
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public ComboBoxPopup()
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{
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this.CustomPopupPlacementCallback = ComboBoxCustomPopupPlacementCallback;
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}
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private void SetChildTemplateIfNeed(ControlTemplate template)
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{
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var contentControl = Child as ContentControl;
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if (contentControl == null) throw new InvalidOperationException("Child must be ContentControl");
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if (!ReferenceEquals(contentControl.Template, template))
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{
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contentControl.Template = template;
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}
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}
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private CustomPopupPlacement[] ComboBoxCustomPopupPlacementCallback(Size popupSize, Size targetSize,
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Point offset)
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{
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var locationFromScreen = this.PlacementTarget.PointToScreen(new Point(0, 0));
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int locationX = (int) locationFromScreen.X%(int) SystemParameters.PrimaryScreenWidth;
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int locationY = (int) locationFromScreen.Y%(int) SystemParameters.PrimaryScreenHeight;
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if (locationX + popupSize.Width > SystemParameters.PrimaryScreenWidth || locationX < 0)
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{
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SetChildTemplateIfNeed(DefaultContentTemplate);
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double newY = locationY + popupSize.Height > SystemParameters.PrimaryScreenHeight
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? -(DefaultVerticalOffset + popupSize.Height)
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: DefaultVerticalOffset + targetSize.Height;
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return new[] { new CustomPopupPlacement(new Point(offset.X, newY), PopupPrimaryAxis.Horizontal) };
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}
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if (locationY + popupSize.Height > SystemParameters.PrimaryScreenHeight)
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{
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SetChildTemplateIfNeed(UpContentTemplate);
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double newY = UpVerticalOffset - popupSize.Height + targetSize.Height;
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return new[] { new CustomPopupPlacement(new Point(offset.X, newY), PopupPrimaryAxis.None) };
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}
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else
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{
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SetChildTemplateIfNeed(DownContentTemplate);
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double newY = DownVerticalOffset;
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return new[] { new CustomPopupPlacement(new Point(offset.X, newY), PopupPrimaryAxis.None) };
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}
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}
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}
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}

‎MaterialDesignThemes.Wpf/MaterialDesignThemes.Wpf.csproj

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<Compile Include="ColorZone.cs" />
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<Compile Include="ComboBoxAssist.cs" />
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<Compile Include="ComboBoxAssistManagedOverlayInfo.cs" />
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<Compile Include="ComboBoxPopup.cs" />
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<Compile Include="Converters\BrushRoundConverter.cs" />
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<Compile Include="Converters\BrushToRadialGradientBrushConverter.cs" />
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<Compile Include="Converters\CalendarDateCoalesceConverter.cs" />

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