I have a RibbonWindow where my WindowStyle is set to None, so what I can't understand is what have happened to the Grip to resize the window?! Even if my controls have their Margin set to 0 in the Bottom part of them will be hidden... It's a strange behaviour.
But if I change the bottom Margin of the controls it's ok, but the Grip can't be seen anyway, probably because part of the client area is hidden...
I have to say, if a have a WPF Window, this doesn't happen, it only happens with the RibbonWindow. And I am using the RibbonWindow because the Ribbon has other look in the proper window.
So what can I do to solve the problem with the Grip?
Some of my code...
<rib:RibbonWindow x:Class="MyApp.Views.MainView"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:rib="clr-namespace:Microsoft.Windows.Controls.Ribbon;assembly=RibbonControlsLibrary"
AllowsTransparency="True"
Background="Transparent"
Height="750"
ResizeMode="CanResizeWithGrip"
Width="1000"
WindowStartupLocation="CenterScreen"
WindowStyle="None">
<Grid Margin="0, 0, 0, 20">
<Border Background="Black"
CornerRadius="5"
Opacity="0.5"/>
</Grid>
</rib:RibbonWindow>
Thanks in advance!
This was intriguing to debug. Turns out that the style for the window has a bug: if the system is defined to have IsGlassEnabled == true (in Win7 Aero theme makes it true) then the window relies on the Microsoft.Windows.Shell.WindowChrome (from Microsoft.Windows.Shell assembly) to draw the border and the top buttons of the window; and this WindowChrome has its GlassFrameThickness property set to 8,30,8,8 in combination with NonClientFrameEdges set to Bottom.
What happens is that because of AllowsTransparency == true the glass border is transparent but the window still "cuts" its thickness from the overall window size because the WindowChrome defines NonClientFrameEdges="Bottom", thus cutting the ResizeGrip from view.
You can see this if you (frantically) drag the window over your screen - you'll see the ResizeGrip flickering.
To solve this we need to define a new WindowChrome with NonClientFrameEdges="None" (or GlassFrameThickness = 0 or both) and assign it to the window only when IsGlassEnabled == true && AllowsTransparency == true (I'm using application resources defined in App.xaml and defining only NonClientFrameEdges="None"):
1. Add these namespaces to App.xaml:
xmlns:ribbon="clr-namespace:Microsoft.Windows.Controls.Ribbon;assembly=RibbonControlsLibrary"
xmlns:ribbonPrimitives="clr-namespace:Microsoft.Windows.Controls.Ribbon.Primitives;assembly=RibbonControlsLibrary"
xmlns:shell="clr-namespace:Microsoft.Windows.Shell;assembly=Microsoft.Windows.Shell"
2. Add these resources:
<ribbonPrimitives:RibbonWindowSmallIconConverter x:Key="RibbonWindowSmallIconConverter" />
<shell:WindowChrome x:Key="WindowChromeWithGlassAndTransparency"
NonClientFrameEdges="None" />
<Style x:Key="MyStyle"
TargetType="{x:Type ribbon:RibbonWindow}">
<Style.Triggers>
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<Condition Binding="{Binding Path=IsGlassEnabled, Source={x:Static shell:SystemParameters2.Current}}"
Value="True" />
<Condition Binding="{Binding AllowsTransparency, RelativeSource={RelativeSource Mode=Self}}"
Value="False" />
</MultiDataTrigger.Conditions>
<Setter Property="shell:WindowChrome.WindowChrome"
Value="{DynamicResource {ComponentResourceKey TypeInTargetAssembly={x:Type ribbon:Ribbon}, ResourceId=WindowChromeAeroWithGlass}}" />
</MultiDataTrigger>
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<Condition Binding="{Binding Path=IsGlassEnabled, Source={x:Static shell:SystemParameters2.Current}}"
Value="True" />
<Condition Binding="{Binding AllowsTransparency, RelativeSource={RelativeSource Mode=Self}}"
Value="True" />
</MultiDataTrigger.Conditions>
<Setter Property="shell:WindowChrome.WindowChrome"
Value="{DynamicResource WindowChromeWithGlassAndTransparency}" />
</MultiDataTrigger>
<DataTrigger Binding="{Binding Path=IsGlassEnabled, Source={x:Static shell:SystemParameters2.Current}}"
Value="True">
<!--This is the original setter of the chrome that makes all the trouble-->
<!--<Setter Property="shell:WindowChrome.WindowChrome"
Value="{DynamicResource {ComponentResourceKey TypeInTargetAssembly={x:Type ribbon:Ribbon}, ResourceId=WindowChromeAeroWithGlass}}" />-->
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type ribbon:RibbonWindow}">
<Grid>
<Border Name="PART_ClientAreaBorder"
Background="{TemplateBinding Control.Background}"
BorderBrush="{TemplateBinding Control.BorderBrush}"
BorderThickness="{TemplateBinding Control.BorderThickness}"
Margin="{Binding Path=WindowNonClientFrameThickness, Source={x:Static shell:SystemParameters2.Current}}" />
<Border BorderThickness="{Binding Path=(shell:WindowChrome.WindowChrome).ResizeBorderThickness, RelativeSource={RelativeSource TemplatedParent}}">
<Grid>
<Image Name="PART_Icon"
shell:WindowChrome.IsHitTestVisibleInChrome="True"
HorizontalAlignment="Left"
VerticalAlignment="Top"
Source="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=Icon, Converter={StaticResource RibbonWindowSmallIconConverter }}"
Width="{Binding Path=SmallIconSize.Width, Source={x:Static shell:SystemParameters2.Current}}"
Height="{Binding Path=SmallIconSize.Height, Source={x:Static shell:SystemParameters2.Current}}" />
<AdornerDecorator>
<ContentPresenter Name="PART_RootContentPresenter" />
</AdornerDecorator>
<ResizeGrip Name="WindowResizeGrip"
shell:WindowChrome.ResizeGripDirection="BottomRight"
HorizontalAlignment="Right"
VerticalAlignment="Bottom"
Visibility="Collapsed"
IsTabStop="False" />
</Grid>
</Border>
</Grid>
<ControlTemplate.Triggers>
<Trigger Value="{x:Null}"
Property="Icon">
<Setter TargetName="PART_Icon"
Property="Source"
Value="/RibbonControlsLibrary;component/Images/GlassyDefaultSystemIcon.png" />
</Trigger>
<Trigger Property="WindowState"
Value="Maximized">
<Setter TargetName="PART_Icon"
Property="Margin"
Value="0,2,0,0" />
</Trigger>
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Property="ResizeMode"
Value="CanResizeWithGrip" />
<Condition Property="WindowState"
Value="Normal" />
</MultiTrigger.Conditions>
<Setter TargetName="WindowResizeGrip"
Property="Visibility"
Value="Visible" />
</MultiTrigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</DataTrigger>
</Style.Triggers>
</Style>
3. In your window use the new style:
<rib:RibbonWindow ....
Style="{StaticResource MyStyle}">
....
</rib:RibbonWindow>
The DataTrigger is almost as is from the original style, with only one modification: I've commented the setter for the WindowChrome.
The MultiDataTriggers are my addition. They check the value of AllowsTransparency property and apply the right WindowChrome: the original if the value is false and one with NonClientFrameEdges="None" (you can also use GlassFrameThickness = 0 instead) if the value is true.
NOTE: this solution removes the ability to resize the window using the edges, resizing of the window is done only by the ResizeGrip.