[英]WPF: Programatically Animate Rectangle Color in Grid
How can I programatically change the Color of a Rectangle in my Grid? 如何以编程方式更改网格中矩形的颜色?
ColorAnimation myColorAnimation = new ColorAnimation();
myColorAnimation.From = Colors.Red;
myColorAnimation.To = Colors.Blue;
myColorAnimation.Duration = new Duration(TimeSpan.FromMilliseconds(500));
myColorAnimation.AutoReverse = false;
myStoryboard = new Storyboard();
myStoryboard.Children.Add(myColorAnimation);
Storyboard.SetTargetName(myColorAnimation, ?); // What do I put here
Storyboard.SetTargetProperty(myColorAnimation, new PropertyPath //What do I put here?
OK, I found a way to do this: 好的,我找到了一种方法:
I create a StoryBoard for each Grid item: 我为每个Grid项目创建一个StoryBoard:
List<Storyboard> _animatableGridRectToGray = new List<Storyboard>();
List<Storyboard> _animatableGridRectToWhite = new List<Storyboard>();
and populate: 并填充:
private void initAnimatableGridRectangles()
{
int index = 1;
foreach (Rectangle rect in SequenceGrid.Children)
{
SolidColorBrush tempBrush = new SolidColorBrush();
rect.Fill = tempBrush;
string brushName = "Brush" + index;
_gridBrushes.Add(brushName, tempBrush);
this.RegisterName(brushName, tempBrush);
Storyboard tempSBToGray = new Storyboard();
Storyboard tempSBToWhite = new Storyboard();
ColorAnimation tempColAnimToGray = getAnimToGray();
ColorAnimation tempColAnimToWhite = getAnimToWhite();
tempSBToGray.Children.Add(tempColAnimToGray);
tempSBToWhite.Children.Add(tempColAnimToWhite);
Storyboard.SetTargetName(tempColAnimToGray, brushName);
Storyboard.SetTargetName(tempColAnimToWhite, brushName);
Storyboard.SetTargetProperty(tempColAnimToGray, new PropertyPath(SolidColorBrush.ColorProperty));
Storyboard.SetTargetProperty(tempColAnimToWhite, new PropertyPath(SolidColorBrush.ColorProperty));
_animatableGridRectToGray.Add(tempSBToGray);
_animatableGridRectToWhite.Add(tempSBToWhite);
index++;
}
}
private ColorAnimation getAnimToGray()
{
ColorAnimation colAnim = new ColorAnimation();
colAnim.To = Colors.Gray;
colAnim.Duration = new Duration(TimeSpan.FromMilliseconds(500));
colAnim.AutoReverse = false;
return colAnim;
}
private ColorAnimation getAnimToWhite()
{
ColorAnimation colAnim = new ColorAnimation();
colAnim.To = Colors.White;
colAnim.Duration = new Duration(TimeSpan.FromMilliseconds(500));
colAnim.AutoReverse = false;
return colAnim;
}
Then I can animate like so: 然后,我可以像这样制作动画:
_animatableGridRectToGray[index].Begin(this);
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