Skip to content

Add expander functionality to define custom header height #496

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
SKProCH merged 5 commits into from
Mar 29, 2026
+46 −47
Merged

Add expander functionality to define custom header height #496

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
5 commits
Select commit Hold shift + click to select a range
2d70c97
Add expander functionality to define custom header height.
geskill Mar 28, 2026
6c91ae5
Improve with MarginSideConverter.
geskill Mar 28, 2026
d5f942f
Migrate expander to DockPanel.
geskill Mar 29, 2026
d7cf9d9
Remove unused imports.
geskill Mar 29, 2026
53893e1
Add dynamic header height demo.
geskill Mar 29, 2026
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
12 changes: 9 additions & 3 deletions Material.Avalonia.Demo/Pages/ExpandersDemo.axaml
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -32,10 +32,16 @@
Content="{Binding }"
ContentTemplate="{StaticResource LoremContentTemplate}"/>

<Expander Header="This expander inflates content from upside!"
ExpandDirection="Up"
<Expander ExpandDirection="Up"
Content="{Binding }"
ContentTemplate="{StaticResource LoremContentTemplate}"/>
ContentTemplate="{StaticResource LoremContentTemplate}">
<Expander.Header>
<StackPanel Spacing="8">
<TextBlock Text="This expander inflates content from upside!" FontSize="20" FontWeight="Bold" />
<TextBlock Text="And the header height adjusts dynamically" FontSize="14" />
</StackPanel>
</Expander.Header>
</Expander>

<StackPanel Orientation="Horizontal">
<Expander Header="Inflates left!"
Expand Down
81 changes: 37 additions & 44 deletions Material.Styles/Resources/Themes/Expander.axaml
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -2,11 +2,12 @@
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:assists="clr-namespace:Material.Styles.Assists"
xmlns:controls="clr-namespace:Material.Styles.Controls">

<ControlTheme x:Key="ExpanderToggleButtonPart" TargetType="ToggleButton">
<Setter Property="Background" Value="Transparent" />
<Setter Property="ClipToBounds" Value="False" />
<Setter Property="FocusAdorner" Value="{x:Null}"></Setter>
<Setter Property="Height" Value="48" />
<Setter Property="FocusAdorner" Value="{x:Null}"/>
<Setter Property="MinHeight" Value="48" />
<Setter Property="assists:ToggleButtonAssist.UncheckedBackground" Value="Transparent" />
<Setter Property="HorizontalAlignment" Value="Stretch"/>
<Setter Property="HorizontalContentAlignment" Value="Stretch" />
Expand Down Expand Up @@ -51,7 +52,7 @@
</Transitions>
</Setter>
</Style>

<Style Selector="^:focus-visible">
<Setter Property="BorderThickness" Value="2"/>
<Setter Property="BorderBrush" Value="{DynamicResource MaterialPrimaryLightBrush}"/>
Expand Down Expand Up @@ -127,22 +128,25 @@
assists:ShadowAssist.ShadowDepth="{TemplateBinding assists:ShadowAssist.ShadowDepth}">
<Border Name="PART_InnerBorder"
CornerRadius="{TemplateBinding CornerRadius}">
<Panel>
<controls:ContentExpandControl Name="PART_ContentExpand"
Content="{TemplateBinding Content}"
ContentTemplate="{TemplateBinding ContentTemplate}"
HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}"
VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}" />

<LayoutTransformControl Name="PART_ToggleTransform">
<DockPanel>
<LayoutTransformControl Name="PART_ToggleTransform"
DockPanel.Dock="Top">
<ToggleButton Name="PART_ToggleButton"
Content="{TemplateBinding Header}"
ContentTemplate="{TemplateBinding HeaderTemplate}"
Cursor="Hand"
Foreground="{DynamicResource MaterialBodyBrush}"
IsChecked="{TemplateBinding IsExpanded, Mode=TwoWay}" />
</LayoutTransformControl>
</Panel>

<controls:ContentExpandControl Name="PART_ContentExpand"
Content="{TemplateBinding Content}"
ContentTemplate="{TemplateBinding ContentTemplate}"
HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}"
VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}" />
</DockPanel>

</Border>
</Border>
</ControlTemplate>
Expand Down Expand Up @@ -176,67 +180,56 @@
<Setter Property="Multiplier" Value="1" />
</Style>

<Style Selector="^:up">
<Style Selector="^ /template/ controls|ContentExpandControl#PART_ContentExpand">
<Setter Property="Orientation" Value="Vertical" />
<Setter Property="VerticalAlignment" Value="Bottom" />
<Setter Property="Margin" Value="0,0,0,48" />
</Style>

<Style Selector="^:up">
<Style Selector="^ /template/ LayoutTransformControl#PART_ToggleTransform">
<Setter Property="VerticalAlignment" Value="Bottom" />
<Setter Property="DockPanel.Dock" Value="Bottom"/>
</Style>
<Style Selector="^ /template/ controls|ContentExpandControl#PART_ContentExpand">
<Setter Property="Orientation" Value="Vertical"/>
<Setter Property="VerticalAlignment" Value="Bottom"/>
</Style>

<Style Selector="^ /template/ ToggleButton#PART_ToggleButton">
<Setter Property="Theme" Value="{StaticResource UpExpanderToggleButtonPart}" />
</Style>
</Style>

<Style Selector="^:down">
<Style Selector="^ /template/ controls|ContentExpandControl#PART_ContentExpand">
<Setter Property="Orientation" Value="Vertical" />
<Setter Property="VerticalAlignment" Value="Top" />
<Setter Property="Margin" Value="0,48,0,0" />
</Style>

<Style Selector="^ /template/ LayoutTransformControl#PART_ToggleTransform">
<Setter Property="VerticalAlignment" Value="Top" />
<Setter Property="DockPanel.Dock" Value="Top"/>
</Style>
<Style Selector="^ /template/ controls|ContentExpandControl#PART_ContentExpand">
<Setter Property="Orientation" Value="Vertical"/>
<Setter Property="VerticalAlignment" Value="Top"/>
</Style>

<Style Selector="^ /template/ ToggleButton#PART_ToggleButton">
<Setter Property="Theme" Value="{StaticResource DownExpanderToggleButtonPart}" />
</Style>
</Style>

<Style Selector="^:left">
<Style Selector="^ /template/ controls|ContentExpandControl#PART_ContentExpand">
<Setter Property="Orientation" Value="Horizontal" />
<Setter Property="HorizontalAlignment" Value="Right" />
<Setter Property="Margin" Value="0,0,48,0" />
</Style>

<Style Selector="^ /template/ LayoutTransformControl#PART_ToggleTransform">
<Setter Property="LayoutTransform" Value="rotate(90deg)" />
<Setter Property="HorizontalAlignment" Value="Right" />
<Setter Property="DockPanel.Dock" Value="Right"/>
</Style>
<Style Selector="^ /template/ controls|ContentExpandControl#PART_ContentExpand">
<Setter Property="Orientation" Value="Horizontal"/>
<Setter Property="HorizontalAlignment" Value="Right"/>
</Style>

<Style Selector="^ /template/ ToggleButton#PART_ToggleButton">
<Setter Property="Theme" Value="{StaticResource LeftExpanderToggleButtonPart}" />
</Style>
</Style>

<Style Selector="^:right">
<Style Selector="^ /template/ controls|ContentExpandControl#PART_ContentExpand">
<Setter Property="Orientation" Value="Horizontal" />
<Setter Property="HorizontalAlignment" Value="Left" />
<Setter Property="Margin" Value="48,0,0,0" />
</Style>

<Style Selector="^ /template/ LayoutTransformControl#PART_ToggleTransform">
<Setter Property="LayoutTransform" Value="rotate(90deg)" />
<Setter Property="HorizontalAlignment" Value="Left" />
<Setter Property="DockPanel.Dock" Value="Left"/>
</Style>
<Style Selector="^ /template/ controls|ContentExpandControl#PART_ContentExpand">
<Setter Property="Orientation" Value="Horizontal"/>
<Setter Property="HorizontalAlignment" Value="Left"/>
</Style>

<Style Selector="^ /template/ ToggleButton#PART_ToggleButton">
<Setter Property="Theme" Value="{StaticResource RightExpanderToggleButtonPart}" />
</Style>
Expand All @@ -245,4 +238,4 @@

<ControlTheme x:Key="{x:Type Expander}" TargetType="Expander"
BasedOn="{StaticResource MaterialExpander}" />
</ResourceDictionary>
</ResourceDictionary>