Windows Phone7屏幕方向与常用控件
跟林永坚老师学习wp7
• 屏幕方向(Orientation)
• 常用控件(Canvas,Grid,StackPanel,TextBlock,Image,MediaElement)
屏幕方向感应页面(Portraint,LandScape)
• 在VS里可以新增 Portraint,LandScape的页面;
• 页面可以支持横屏 竖屏 或者同时支持两者
• 不能通过代码来改变屏幕方向
SupportedOrientations表示页面支持的屏幕方向,Orientation代表页面启动的方向;
可以通过注册事件来实现元素的控制:
namespace PageNavigation.views
{
public partial class About : PhoneApplicationPage
{
public About()
{
InitializeComponent();
OrientationChanged += new EventHandler<OrientationChangedEventArgs>(About_OrientationChanged);
}
void About_OrientationChanged(object sender, OrientationChangedEventArgs e)
{
if (e.Orientation == PageOrientation.LandscapeLeft || e.Orientation == PageOrientation.LandscapeRight)
{
TitlePanel.Visibility = Visibility.Collapsed;
}
else if(e.Orientation == PageOrientation.PortraitDown || e.Orientation == PageOrientation.PortraitUp)
{
TitlePanel.Visibility = Visibility.Visible;
}
}
}
}
使用TextBlock来格式化文本:
<TextBlock Height="183" HorizontalAlignment="Left" Margin="56,126,0,0" Name="textBlock1" VerticalAlignment="Top" Width="335">
<LineBreak></LineBreak>
<Run Foreground="Beige" FontSize="32">文字一</Run>
<LineBreak/>
<Run Foreground="Green" FontSize="20">文字2</Run>
</TextBlock>
Img控件:支持png,jpeg,支持网络文件和本地文件(本地文件的Build Action为content)
<Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0">
<Image Height="121" Source="http://cn.bing.com/az/hprichbgp=rb%2fPipefishes_ZH-CN1693383898.jpg" HorizontalAlignment="Left" Margin="9,6,0,0" Name="image1" Stretch="Fill" VerticalAlignment="Top" Width="398" />
<Image Height="350" Source="/pictures/DSCF0885.JPG" HorizontalAlignment="Left" Margin="6,154,0,0" Name="image2" Stretch="Fill" VerticalAlignment="Top" Width="462" />
</Grid>
UI布局控件比较:
• Canvas绝对定位控件,速度快,
• Grid网格定位,
• StackPanel自动定位控件
在使用canvas的时候往往会出现竖屏的时候是完整的,横屏的时候就会缺少元素的情况,这里有两个解决办法,一是通过注册事件,二是通过使用ScrollViewer;
public partial class Picture : PhoneApplicationPage
{
public Picture()
{
InitializeComponent();
OrientationChanged += new EventHandler<OrientationChangedEventArgs>(Picture_OrientationChanged);
}
void Picture_OrientationChanged(object sender, OrientationChangedEventArgs e)
{
if (e.Orientation == PageOrientation.LandscapeLeft || e.Orientation == PageOrientation.LandscapeRight)
{
Canvas.SetTop(button1, 200);
}
else if (e.Orientation == PageOrientation.PortraitDown || e.Orientation == PageOrientation.PortraitUp)
{
Canvas.SetTop(button1,466);
}
}
}
Stackpanel控件:自动定位控件,不能指定具体子控件的布局;
可以通过注册事件调整子控件的方向
if (e.Orientation == PageOrientation.LandscapeLeft || e.Orientation == PageOrientation.LandscapeRight)
{
stackpaneltest.Orientation = System.Windows.Controls.Orientation.Horizontal;
}
else if (e.Orientation == PageOrientation.PortraitDown || e.Orientation == PageOrientation.PortraitUp)
{
stackpaneltest.Orientation = System.Windows.Controls.Orientation.Vertical;
}
Grid控件:优点容易支持翻屏的控件布局
注册事件的代码
if (e.Orientation == PageOrientation.LandscapeLeft || e.Orientation == PageOrientation.LandscapeRight)
{
Grid.SetRow(stackpaneltest1, 0);
Grid.SetColumn(stackpaneltest1, 1);
}
else if (e.Orientation == PageOrientation.PortraitDown || e.Orientation == PageOrientation.PortraitUp)
{
Grid.SetRow(stackpaneltest1, 1);
Grid.SetColumn(stackpaneltest1, 0);
}
MediaElement控件支持音频和视频,支持网络文件和本地文件,如果文件时本地文件,builaction设置为content
mediaElement1.AutoPlay = true;
mediaElement1.Source = new Uri("/vedio/my girl - 爱上鲨鱼的人鱼.mp3", UriKind.RelativeOrAbsolute);
mediaElement1.Volume = 10;
mediaElement1.Position = TimeSpan.FromMilliseconds(0);
mediaElement1.Play();
代码下载:http://vdisk.weibo.com/s/2P2EX
摘自 麻将我会