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feat(controls): Add TitleBar CenterContent property #1484

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Merged
pomianowski merged 13 commits into from
Jan 10, 2026
Merged

feat(controls): Add TitleBar CenterContent property #1484

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93661a4
ADD TitleBar CenterContent property to allow content in the middle of…
luca-domenichini Jul 11, 2025
04f1c13
Update TitleBar.cs
luca-domenichini Jul 11, 2025
41e575d
bind center area VerticalAlignment to VerticalContentAlignment of Tit…
luca-domenichini Jul 15, 2025
821e785
Merge branch 'main' of https://github.com/luca-domenichini/wpfui
luca-domenichini Jul 15, 2025
ca36d66
Merge from main
luca-domenichini Nov 12, 2025
6366d69
Merge pull request #2 from luca-domenichini/merge-2025-11-12
luca-domenichini Nov 12, 2025
8005959
Restored missing statements
luca-domenichini Nov 12, 2025
db3dd2a
untabify
luca-domenichini Nov 12, 2025
bd437ae
Fix formatting in TitleBar.cs
luca-domenichini Nov 21, 2025
4aa9aeb
Merge branch 'lepoco:main' into main
luca-domenichini Nov 24, 2025
cf04daf
Merge branch 'main' into main
luca-domenichini Dec 5, 2025
4124f63
Merge branch 'main' into main
luca-domenichini Dec 18, 2025
513d1a3
Merge branch 'main' into main
pomianowski Jan 10, 2026
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61 changes: 33 additions & 28 deletions src/Wpf.Ui/Controls/TitleBar/TitleBar.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -66,6 +66,16 @@ public partial class TitleBar : System.Windows.Controls.Control, IThemeControl
new PropertyMetadata(null)
);

/// <summary>
/// Property for <see cref="CenterContent"/>.
/// </summary>
public static readonly DependencyProperty CenterContentProperty = DependencyProperty.Register(
nameof(CenterContent),
typeof(object),
typeof(TitleBar),
new PropertyMetadata(null)
);

/// <summary>
/// Property for <see cref="TrailingContent"/>.
/// </summary>
Expand Down Expand Up @@ -233,6 +243,15 @@ public object? Header
set => SetValue(HeaderProperty, value);
}

/// <summary>
/// Gets or sets the content displayed in the center of the <see cref="TitleBar"/>.
/// </summary>
public object? CenterContent
{
get => GetValue(CenterContentProperty);
set => SetValue(CenterContentProperty, value);
}

/// <summary>
/// Gets or sets the content displayed in right side of the <see cref="TitleBar"/>.
/// </summary>
Expand Down Expand Up @@ -683,37 +702,23 @@ or PInvoke.WM_NCLBUTTONUP
bool isMouseOverHeaderContent = false;
IntPtr htResult = (IntPtr)PInvoke.HTNOWHERE;

if (message == PInvoke.WM_NCHITTEST)
{
if (TrailingContent is UIElement || Header is UIElement)
{
UIElement? headerRightUiElement = TrailingContent as UIElement;

if (Header is UIElement headerLeftUIElement && headerLeftUIElement != _titleBlock)
{
isMouseOverHeaderContent =
headerLeftUIElement.IsMouseOverElement(lParam)
|| (headerRightUiElement?.IsMouseOverElement(lParam) ?? false);
}
else
{
isMouseOverHeaderContent = headerRightUiElement?.IsMouseOverElement(lParam) ?? false;
}
}

htResult = GetWindowBorderHitTestResult(hwnd, lParam);
}
if (message == PInvoke.WM_NCHITTEST)
{
if (TrailingContent is UIElement || Header is UIElement || CenterContent is UIElement)
{
UIElement? headerLeftUIElement = Header as UIElement;
UIElement? headerCenterUIElement = CenterContent as UIElement;
UIElement? headerRightUiElement = TrailingContent as UIElement;

var e = new HwndProcEventArgs(hwnd, msg, wParam, lParam, isMouseOverHeaderContent);
WndProcInvoked?.Invoke(this, e);
isMouseOverHeaderContent = (headerLeftUIElement is not null && headerLeftUIElement != _titleBlock && headerLeftUIElement.IsMouseOverElement(lParam))
|| (headerCenterUIElement?.IsMouseOverElement(lParam) ?? false)
|| (headerRightUiElement?.IsMouseOverElement(lParam) ?? false);
}

if (e.ReturnValue != null)
{
handled = e.Handled;
return e.ReturnValue ?? IntPtr.Zero;
}
htResult = GetWindowBorderHitTestResult(hwnd, lParam);
}
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Copilot AI Nov 12, 2025

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Tabs are used for indentation instead of spaces. According to the project's .editorconfig, C# files should use spaces (indent_style = space). Please replace tabs with spaces for consistent formatting.

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@luca-domenichini luca-domenichini Nov 12, 2025

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fixed


switch (message)
switch (message)
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Tab used for indentation instead of spaces. According to the project's .editorconfig, C# files should use spaces (indent_style = space). Please replace the tab with spaces.

Suggested change
switch (message)
switch (message)

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@luca-domenichini luca-domenichini Nov 12, 2025

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fixed

{
case PInvoke.WM_NCHITTEST when CloseWindowByDoubleClickOnIcon && _icon.IsMouseOverElement(lParam):
// Ideally, clicking on the icon should open the system menu, but when the system menu is opened manually, double-clicking on the icon does not close the window
Expand Down
12 changes: 10 additions & 2 deletions src/Wpf.Ui/Controls/TitleBar/TitleBar.xaml
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Original file line number Diff line number Diff line change
Expand Up @@ -137,6 +137,7 @@
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="*" />
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="Auto" />
</Grid.ColumnDefinitions>

<!-- Title text or other header content -->
Expand All @@ -145,15 +146,22 @@
HorizontalAlignment="Left"
Content="{TemplateBinding Header}" />

<!-- Additional header content -->
<!-- Centered content -->
<ContentPresenter
Grid.Column="1"
HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
Content="{TemplateBinding CenterContent}" />

<!-- Additional header content -->
<ContentPresenter
Grid.Column="2"
HorizontalAlignment="Right"
Content="{TemplateBinding TrailingContent}" />

<!-- Navigation buttons - Close, Restore, Maximize, Minimize -->
<Grid
Grid.Column="2"
Grid.Column="3"
HorizontalAlignment="Right"
VerticalAlignment="Top">
<Grid.ColumnDefinitions>
Expand Down