在wince中使用C++语言创建Silverlight的VisualState

核心提示：state->SetName(L"State1");StateCollection->Add(state,NULL);创建一个新的故事板，并将其设置到刚创建的状态中IXRStoryboardPtr Storyboard;app->CreateObject(IID_IXRStoryb

state->SetName(L"State1");

StateCollection->Add(state,NULL);

创建一个新的故事板，并将其设置到刚创建的状态中

IXRStoryboardPtr Storyboard;

app->CreateObject(IID_IXRStoryboard,&Storyboard);

state->SetStoryboard(Storyboard);

创建一个IXRDoubleAnimationUsingKeyFrames对象，将它添加到故事板中，

[注:IXRDoubleAnimationUsingKeyFrames派生自IXRTimeline，通过在不同帧时对同一属性设置不同的数值来实现动画效果]

IXRTimelineCollectionPtr children;

Storyboard->GetChildren(&children);

IXRDoubleAnimationUsingKeyFramesPtr animation;

app->CreateObject(IID_IXRDoubleAnimationUsingKeyFrames,&animation);

children->Add(animation,NULL);

设置animation对象的通用属性

XRTimeSpan span;

memset(&span,0,sizeof(XRTimeSpan));

animation->SetBeginTime(&span);

animation->SetBeginTime(&span);

animation->SetDuration(&duration);

animation->SetAttachedProperty(L"Storyboard.TargetName",L"rectangle");

animation->SetAttachedProperty(L"Storyboard.TargetProperty",L"(UIElement.RenderTransform).(TransformGroup.Children)[2].(RotateTransform.Angle)");

创建新的一帧，并将其添加到animation的帧集合中

IXRDoubleKeyFrameCollectionPtr frameCollection;

animation->GetKeyFrames(&frameCollection);

IXRSplineDoubleKeyFramePtr keyFrame;

app->CreateObject(IID_IXRSplineDoubleKeyFrame,&keyFrame);

XRKeyTime time;

time.Ticks = time.TicksPerSecond;

keyFrame->SetKeyTime(&time);

keyFrame->SetValue(75);

frameCollection->Add(keyFrame,NULL);

OK，大功告成，转换状态，看到了矩形的变化过程

Root->GoToVisualState(L"State1",true);