2018-6-17-win10-UWP-全屏

title	author	date	CreateTime	categories
win10 UWP 全屏	lindexi	2018-06-17 17:51:19 +0800	2018-2-13 17:23:3 +0800	Win10 UWP

win10 可以全屏软件或窗口，窗口有一般、最小化、最大化。我们有新的API设置我们软件是全屏，是窗口。我们可以使用ApplicationView让我们软件全屏或取消。

下面是一个简单的例子，判断我们软件是不是全屏，如果是，就不全屏，代码在一个 ToggleButton 的点击

ApplicationView view = ApplicationView.GetForCurrentView();

bool isInFullScreenMode = view.IsFullScreenMode;

if (isInFullScreenMode)  
{
    view.ExitFullScreenMode();
}
else  
{
    view.TryEnterFullScreenMode();
}

IsFullScreenMode为true，现在应用全屏

ExitFullScreenMode退出全屏

TryEnterFullScreenMode进入全屏，进入全屏成功true

如果窗口改变需要知道，可以注册Window.Current.SizeChanged

public class IsFullScreenModeTrigger : StateTriggerBase  
{
    public IsFullScreenModeTrigger()
    {
        ApplicationView view = ApplicationView.GetForCurrentView();

        SetActive(view.IsFullScreenMode);

        Window.Current.SizeChanged += CurrentWindow_SizeChanged;
    }

    private void CurrentWindow_SizeChanged(object sender, Windows.UI.Core.WindowSizeChangedEventArgs e)
    {
        ApplicationView view = ApplicationView.GetForCurrentView();

        SetActive(view.IsFullScreenMode);
    }
}

<Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">  
    <VisualStateManager.VisualStateGroups>
        <VisualStateGroup>
            <VisualState x:Name="InFullScreen">
                <VisualState.StateTriggers>
                    <local:IsFullScreenModeTrigger />
                </VisualState.StateTriggers>
                <VisualState.Setters>
                    <Setter Target="IsFullScreenText.Text" Value="In full screen mode" />
                </VisualState.Setters>
            </VisualState>
        </VisualStateGroup>
    </VisualStateManager.VisualStateGroups>
    <StackPanel HorizontalAlignment="Center">
        <Button Click="Button_Click" 
                Content="Toggle full screen"></Button>
        <TextBlock x:Name="IsFullScreenText" 
                    FontSize="72" 
                    TextWrapping="Wrap" 
                    Text="Not in full screen mode"/>
    </StackPanel>
</Grid>  

在我们应用变为全屏，textblock就会显示 In full screen mode

我们可以设置PreferredLaunchWindowingMode，在我们应用打开设置窗口大小

ApplicationView.PreferredLaunchWindowingMode = ApplicationViewWindowingMode.FullScreen;

ApplicationViewWindowingMode可以Auto ,PreferredLaunchViewSize设置窗口和ApplicationView.PreferredLaunchViewSize，如果没有设置ApplicationView.PreferredLaunchViewSize会使用上次关闭窗口， 如FullScreen

win10有很简单的API可以应用全屏，在电脑，我们经常用窗口，手机经常使用全屏。

参见：http://igrali.com/2015/06/21/full-screen-mode-in-windows-10-universal-apps/

VB 全屏

在点击按钮的时候设置 UWP 窗口在原来全屏的时候变为窗口显示，在窗口显示变为全屏

    Sub FullScreenButton() Handles Button.Click
        Dim isFullScreen = ApplicationView.GetForCurrentView.IsFullScreenMode

        If isFullScreen Then
            ApplicationView.GetForCurrentView.ExitFullScreenMode()
        Else
            ApplicationView.GetForCurrentView.TryEnterFullScreenMode()
        End If
    End Sub

C++ 全屏

<script src="https://gist.github.com/gyakoo/cfef3ca0403d26a082afc8c055240082.js"></script>

参见：https://gist.github.com/gyakoo/cfef3ca0403d26a082afc8c055240082