【发布时间】：2013-09-07 20:10:18
【问题描述】：
这是我的旋转对象的代码。我必须旋转两个相同类型的对象。
初始化：
private TransformGroup trGrp;
private RotateTransform trRot;
private TransformGroup trGrp1;
private RotateTransform trRot1;
static private double angle;
SerialPort port;
value v;
string result;
public int zeroValue;
public MainWindow()
{
InitializeComponent();
angle = 0;
zeroValue = 327;
trGrp = new TransformGroup();
trRot = new RotateTransform(angle) { CenterX = rectangle1.Width / 2, CenterY = rectangle1.Height };
trGrp1 = new TransformGroup();
trRot1 = new RotateTransform(angle) { CenterX = rectangle1.Width / 2, CenterY = rectangle1.Height };
// trGrp.Children.Add(trRot);
//trGrp1.Children.Add(trRot1);
v = new value();
port = new SerialPort("COM1", 9600, Parity.None, 8, StopBits.One);
port.DataReceived += new SerialDataReceivedEventHandler(port_DataReceived);
port.Open();
}
串口接收数据代码：
void port_DataReceived(object sender, SerialDataReceivedEventArgs e)
{
if (!port.IsOpen)
{
port.Open();
}
try
{
result = port.ReadLine();
result = result.Replace("\r", "");
}
catch (Exception e1)
{ MessageBox.Show(e1.Message); }
int[] temp = new int[4];
this.Dispatcher.BeginInvoke(System.Windows.Threading.DispatcherPriority.Background,
new Action(
delegate()
{
try
{
temp[0] = int.Parse(result[1].ToString() + result[2].ToString() + result[3].ToString() + result[4].ToString());
if (temp[0] == zeroValue)
{
trRot.Angle = 0;
trGrp.Children.Add(trRot);
rectangle1.RenderTransform = trGrp;
trGrp.Children.RemoveAt(0);//because Add function adds a new trGrp so its size increases and we do not need old trGrp so we remove them.
label3.Content = trRot.Angle.ToString();
}
else if (temp[0] > zeroValue)
{
int totalValues = temp[0] - zeroValue;
if (totalValues == 1)
{
totalValues = 0;
}
textBox3.Text = temp[0].ToString();
angle = totalValues * Properties.Settings.Default.angle;
if (angle<31)
{
trRot.Angle = angle / 2;
trGrp.Children.Add(trRot);
rectangle1.RenderTransform = trGrp;
//trGrp.Children.RemoveAt(1);//because Add function adds a new trGrp so its size increases and we do not need old trGrp so we remove them.
trGrp.Children.Remove(trRot);
label3.Content = angle.ToString();
}
}
else if (temp[0] < zeroValue)
{
int totalValues = zeroValue - temp[0];
if (totalValues==1)
{
totalValues = 0;
}
textBox3.Text = temp[0].ToString();
angle = -totalValues * Properties.Settings.Default.angle;
if (angle> -21)
{
trRot.Angle = angle / 2;
trGrp.Children.Add(trRot);
rectangle1.RenderTransform = trGrp;
trGrp.Children.Remove(trRot);//because Add function adds a new trGrp so its size increases and we do not need old trGrp so we remove them.
label3.Content = angle.ToString();
}
}
}
catch (Exception)
{ }
}
));
this.Dispatcher.BeginInvoke(System.Windows.Threading.DispatcherPriority.Background,
new Action(
delegate()
{
try
{
temp[1] = int.Parse(result[6].ToString() + result[7].ToString() + result[8].ToString() + result[9].ToString());
if (temp[1] == zeroValue)
{
trRot1.Angle = 0;
trGrp.Children.Add(trRot1);
rectangle2.RenderTransform = trGrp1;
trGrp1.Children.RemoveAt(1);//because Add function adds a new trGrp so its size increases and we do not need old trGrp so we remove them.
// textBox3.Text = trRot.Angle.ToString();
label4.Content = angle.ToString();
}
else if (temp[1] > zeroValue)
{
int totalValues = temp[1] - zeroValue;
if (totalValues == 1)
{
totalValues = 0;
}
angle = totalValues * Properties.Settings.Default.angle;
angle = Math.Round(angle, 0);
if (angle < 21)
{
trRot1.Angle = angle / 2;
trGrp1.Children.Add(trRot1);
rectangle2.RenderTransform = trGrp1;
trGrp1.Children.RemoveAt(0);//because Add function adds a new trGrp so its size increases and we do not need old trGrp so we remove them.
label4.Content = angle.ToString();
}
}
else if (temp[1] < zeroValue)
{
int totalValues = zeroValue - temp[1];
if (totalValues == 1)
{
totalValues = 0;
}
angle = -totalValues * Properties.Settings.Default.angle;
if (angle > -21)
{
trRot1.Angle = angle / 2;
trGrp1.Children.Add(trRot1);
rectangle2.RenderTransform = trGrp1;
trGrp1.Children.RemoveAt(0);//because Add function adds a new trGrp so its size increases and we do not need old trGrp so we remove them.
label4.Content = angle.ToString();
}
}
}
catch (Exception)
{
}
}));
}
我在这里使用了两个 Dispatcher.BeginInvok 函数，因为我想同时旋转两个对象。但问题是，当我只使用一个对象来旋转时，就没有问题了。但是当我包含第二个对象时，第一个对象不会根据我在程序中提到的角度正确旋转。我的理解是，每次触发事件时，transformGroup 添加一个新的rotateTransform 是一个问题。所以我尝试在添加后删除添加的 TrRot。但这对我也不起作用。 谢谢。
【问题讨论】：
-
为什么不直接在 XAML 中添加动画？此外，使用
Dispatcher.Invoke不 是否意味着您的代码将并行运行...它只是将您的请求添加到主 UI 线程队列中，就像您在 XAML 中添加两个动画一样。 -
会有不同的结果吗？我必须为收到的串行端口数据编写事件处理程序，这就是我在那里写它的原因。
标签： wpf transformation rotatetransform transformgroup