C# 4 and .NET 4

3 - D ❘ 1029
< /VisualStateGroup.Transitions >
< /VisualStateGroup >
< /VisualStateManager.VisualStateGroups >
< Border x:Name="border1" BorderThickness="12" >
< Border.BorderBrush >
< SolidColorBrush x:Name="brush1" Color="White" / >
< /Border.BorderBrush >
< Image x:Name="image1" / >
< /Border >
< /Button >
< /Grid >
< /DockPanel >
< /Window >
code snippet VisualStateDemo/MainWindow.xaml
With the Click events, the Button elements in the StackPanel handlers from code - behind are invoked.
Within code - behind the GoToElementState() method of the VisualStateManager is invoked to change
the button1 object to a new state. The third argument of this method defi nes whether the transition
changing to this state should be invoked:
private void OnSleeping(object sender, RoutedEventArgs e)
{
VisualStateManager.GoToElementState(button1, "Sleeping", true);
}
private void OnPlaying(object sender, RoutedEventArgs e)
{
VisualStateManager.GoToElementState(button1, "Playing", true);
}
private void OnCrying(object sender, RoutedEventArgs e)
{
VisualStateManager.GoToElementState(button1, "Crying", true);
}
After running the application you can see the
state changes as shown in Figure 35 - 34.
c o d e s n i p p e t V i s u a l S t a t e D e m o / M a i nW i n d o w. x a m l . c s
3 - d
The last section in this large chapter gives
you an introduction to the 3 - D features of
WPF. Here you ’ ll fi nd the information to
get started.
figure 35-34
The namespace for 3-D with WPF is System.Windows.Media.Media3D.
To understand 3 - D with WPF it is important to know the difference between the coordination systems.
Figure 35 - 35 shows the WPF 3 - D coordination system. The origin is placed in the center. The x - axis has
positive values to the right and negative values to the left. The y - axis is vertical with positive values up and
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