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WPF - hide element when hovering a mouse over another element

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0

There are some elements in a grid, and all I want is to show/hide the button when a mouse is over a rectangle.

<UserControl ...>
 <Grid>
 <Rectangle ...>
 <Button ...>
 </Grid>
</UserControl>

I've tried several triggers but was unsuccessful so far. Please help.

wpf xaml triggers

share|improve this question

asked Mar 8 at 11:34

phantasmphantasm

446412

add a comment | 

0

There are some elements in a grid, and all I want is to show/hide the button when a mouse is over a rectangle.

<UserControl ...>
 <Grid>
 <Rectangle ...>
 <Button ...>
 </Grid>
</UserControl>

I've tried several triggers but was unsuccessful so far. Please help.

wpf xaml triggers

share|improve this question

asked Mar 8 at 11:34

phantasmphantasm

446412

add a comment | 

There are some elements in a grid, and all I want is to show/hide the button when a mouse is over a rectangle.

<UserControl ...>
 <Grid>
 <Rectangle ...>
 <Button ...>
 </Grid>
</UserControl>

I've tried several triggers but was unsuccessful so far. Please help.

wpf xaml triggers

share|improve this question

asked Mar 8 at 11:34

phantasmphantasm

446412

<UserControl ...>
 <Grid>
 <Rectangle ...>
 <Button ...>
 </Grid>
</UserControl>

share|improve this question

asked Mar 8 at 11:34

phantasmphantasm

446412

share|improve this question

asked Mar 8 at 11:34

phantasmphantasm

446412

asked Mar 8 at 11:34

phantasmphantasm

446412

asked Mar 8 at 11:34

phantasmphantasm

446412

1 Answer
1

active

oldest

votes

1

This is what you need:
A datatrigger bound to the Control to trigger it
alternativly you could use a converter sth like a BoolenToInvisibilityConverter

Ps if you want to invert the logic you need to set the visibility in the style as it would be overwritten otherwhise

 <StackPanel>
 <Rectangle Fill="Red" Height="20" Width="29" Name="MyRect"/>
 <Button>
 <Button.Style>
 <Style TargetType="Button">
 <!--<Setter Property="Visibility" Value="Hidden"/>-->
 <Style.Triggers>
 <DataTrigger Binding="Binding ElementName=MyRect, Path=IsMouseOver" Value="True">
 <Setter Property="Visibility" Value="Hidden" />
 </DataTrigger>
 </Style.Triggers>
 </Style>
 </Button.Style> 
 </Button>
 </StackPanel>

the trigger-landscape in Wpf can be confusing sometimes, dont worry you will learn to live with it!

share|improve this answer

edited Mar 8 at 12:28

answered Mar 8 at 11:57

Denis SchafDenis Schaf

81818

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  It works contrarywise - when mouse is over a button, rectangle becomes invisible. But It should show/hide the button when over a rectangle :)
  
  – phantasm
  Mar 8 at 12:21
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  i updated the answer
  
  – Denis Schaf
  Mar 8 at 12:24
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  thanks, but it has the same problem as Mathivanan's version.
  
  – phantasm
  Mar 8 at 12:28
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  i edited once again check out the line that is comented out just comment it back in and change the Setter from Hidden to Visibile
  
  – Denis Schaf
  Mar 8 at 12:29
  
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  You are creating a style. Styles can always be overwritten in your XAML. Imagine a button-style you created that makes all buttons red. If you define one button to be blue it will still be blue as you have overwritten its color. Thats exactly what happens if you set the visibility directly on the element. It will overwrite your style so the parameter needs to be set in the style as well (see answer--> comment)
  
  – Denis Schaf
  Mar 8 at 12:33
  
  

  
  
  
  

 | 
show 1 more comment

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1

This is what you need:
A datatrigger bound to the Control to trigger it
alternativly you could use a converter sth like a BoolenToInvisibilityConverter

Ps if you want to invert the logic you need to set the visibility in the style as it would be overwritten otherwhise

 <StackPanel>
 <Rectangle Fill="Red" Height="20" Width="29" Name="MyRect"/>
 <Button>
 <Button.Style>
 <Style TargetType="Button">
 <!--<Setter Property="Visibility" Value="Hidden"/>-->
 <Style.Triggers>
 <DataTrigger Binding="Binding ElementName=MyRect, Path=IsMouseOver" Value="True">
 <Setter Property="Visibility" Value="Hidden" />
 </DataTrigger>
 </Style.Triggers>
 </Style>
 </Button.Style> 
 </Button>
 </StackPanel>

the trigger-landscape in Wpf can be confusing sometimes, dont worry you will learn to live with it!

share|improve this answer

edited Mar 8 at 12:28

answered Mar 8 at 11:57

Denis SchafDenis Schaf

81818

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  It works contrarywise - when mouse is over a button, rectangle becomes invisible. But It should show/hide the button when over a rectangle :)
  
  – phantasm
  Mar 8 at 12:21
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  i updated the answer
  
  – Denis Schaf
  Mar 8 at 12:24
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  thanks, but it has the same problem as Mathivanan's version.
  
  – phantasm
  Mar 8 at 12:28
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  i edited once again check out the line that is comented out just comment it back in and change the Setter from Hidden to Visibile
  
  – Denis Schaf
  Mar 8 at 12:29
  
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  You are creating a style. Styles can always be overwritten in your XAML. Imagine a button-style you created that makes all buttons red. If you define one button to be blue it will still be blue as you have overwritten its color. Thats exactly what happens if you set the visibility directly on the element. It will overwrite your style so the parameter needs to be set in the style as well (see answer--> comment)
  
  – Denis Schaf
  Mar 8 at 12:33
  
  

  
  
  
  

 | 
show 1 more comment

1

This is what you need:
A datatrigger bound to the Control to trigger it
alternativly you could use a converter sth like a BoolenToInvisibilityConverter

Ps if you want to invert the logic you need to set the visibility in the style as it would be overwritten otherwhise

 <StackPanel>
 <Rectangle Fill="Red" Height="20" Width="29" Name="MyRect"/>
 <Button>
 <Button.Style>
 <Style TargetType="Button">
 <!--<Setter Property="Visibility" Value="Hidden"/>-->
 <Style.Triggers>
 <DataTrigger Binding="Binding ElementName=MyRect, Path=IsMouseOver" Value="True">
 <Setter Property="Visibility" Value="Hidden" />
 </DataTrigger>
 </Style.Triggers>
 </Style>
 </Button.Style> 
 </Button>
 </StackPanel>

the trigger-landscape in Wpf can be confusing sometimes, dont worry you will learn to live with it!

share|improve this answer

edited Mar 8 at 12:28

answered Mar 8 at 11:57

Denis SchafDenis Schaf

81818

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  It works contrarywise - when mouse is over a button, rectangle becomes invisible. But It should show/hide the button when over a rectangle :)
  
  – phantasm
  Mar 8 at 12:21
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  i updated the answer
  
  – Denis Schaf
  Mar 8 at 12:24
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  thanks, but it has the same problem as Mathivanan's version.
  
  – phantasm
  Mar 8 at 12:28
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  i edited once again check out the line that is comented out just comment it back in and change the Setter from Hidden to Visibile
  
  – Denis Schaf
  Mar 8 at 12:29
  
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  You are creating a style. Styles can always be overwritten in your XAML. Imagine a button-style you created that makes all buttons red. If you define one button to be blue it will still be blue as you have overwritten its color. Thats exactly what happens if you set the visibility directly on the element. It will overwrite your style so the parameter needs to be set in the style as well (see answer--> comment)
  
  – Denis Schaf
  Mar 8 at 12:33
  
  

  
  
  
  

 | 
show 1 more comment

This is what you need:
A datatrigger bound to the Control to trigger it
alternativly you could use a converter sth like a BoolenToInvisibilityConverter

Ps if you want to invert the logic you need to set the visibility in the style as it would be overwritten otherwhise

 <StackPanel>
 <Rectangle Fill="Red" Height="20" Width="29" Name="MyRect"/>
 <Button>
 <Button.Style>
 <Style TargetType="Button">
 <!--<Setter Property="Visibility" Value="Hidden"/>-->
 <Style.Triggers>
 <DataTrigger Binding="Binding ElementName=MyRect, Path=IsMouseOver" Value="True">
 <Setter Property="Visibility" Value="Hidden" />
 </DataTrigger>
 </Style.Triggers>
 </Style>
 </Button.Style> 
 </Button>
 </StackPanel>

the trigger-landscape in Wpf can be confusing sometimes, dont worry you will learn to live with it!

share|improve this answer

edited Mar 8 at 12:28

answered Mar 8 at 11:57

Denis SchafDenis Schaf

81818

 <StackPanel>
 <Rectangle Fill="Red" Height="20" Width="29" Name="MyRect"/>
 <Button>
 <Button.Style>
 <Style TargetType="Button">
 <!--<Setter Property="Visibility" Value="Hidden"/>-->
 <Style.Triggers>
 <DataTrigger Binding="Binding ElementName=MyRect, Path=IsMouseOver" Value="True">
 <Setter Property="Visibility" Value="Hidden" />
 </DataTrigger>
 </Style.Triggers>
 </Style>
 </Button.Style> 
 </Button>
 </StackPanel>

share|improve this answer

edited Mar 8 at 12:28

answered Mar 8 at 11:57

Denis SchafDenis Schaf

81818

answered Mar 8 at 11:57

Denis SchafDenis Schaf

81818

answered Mar 8 at 11:57

Denis SchafDenis Schaf

81818