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Switch between Landscape or Portrait mode

hi.
How do I know if the tablet is in Landscape or Portrait mode?
I have an application written in WPF (C#) , the layout looks nice if the tablet is Landscape mode, but for Portrait mode I have to use another layout.
How do I get know app. when layout have to be switched from one to another?

David Favor

You can't.

All you can know, at any given point, are screen dimensions.

And even screen dimensions can change instantly, as someone rotates their device.

The easy way to deal with this is to use @media directives with CSS breakpoints for different devices.

So you'll never write code for landscape or portrait, you'll write code for a specific CSS breakpoint, which can change at any time.

mastiSoft

ASKER

Hi, thank you for the answer David.

ASKER CERTIFIED SOLUTION

Chris Stanyon

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it_saige

There are events which are fired when the display settings change; e.g. -

Microsoft.Win32.SystemEvents.DisplaySettingsChanged += new           
    EventHandler(OnDisplaySettingsChanged);

public bool IsLandscape { get; set; }

void OnDisplaySettingsChanged(object sender, EventArgs e)
{
  IsLandscape = SystemParameters.PrimaryScreenWidth > SystemParameters.PrimaryScreenHeight;

  RaisePropertyChanged( "IsLandscape" );
}

Open in new window

Main Window.xaml -

<Border >
    <Border.Style>
        <Style TargetType="{x:Type Border}">
            <Style.Triggers>
                <DataTrigger Binding="{Binding IsLandscape}" Value="True">
                    <Setter Property="LayoutTransform">
                        <Setter.Value>
                            <RotateTransform Angle="90"/>
                        </Setter.Value>
                    </Setter>
                </DataTrigger>
            </Style.Triggers>
         </Style>
    </Border.Style>

///The rest of your controls and UI

</Border>

Open in new window

-saige-

mastiSoft

ASKER

thank you to all for suggestions. I will test all of them and give my answer tomorrow.

kaufmed

You can't.

All you can know, at any given point, are screen dimensions.

Ummm... Doesn't landscape mode simply mean that the width is greater than the height (and vice versa)?

Or in other words, line 8 of it_saige's first snippet?