private void SwiperBtn_MouseMove(object sender, MouseEventArgs e)
{
if (isMouseDownSwiperBtn && DisPlayPanel.Switch)
{
end_y = e.GetPosition(SwiperCanvas).Y;
SwiperBtn btn = (SwiperBtn)sender;
double val = first + (end_y - start_y);
if (val < -10)
{
val = -10;
}
if (val > DisPlayPanel.Height - 10)
{
val = DisPlayPanel.Height - 10;
}
foreach (ChannelItem ch in Channels)
{
if (btn.Id == ch.Id)
{
ch.Offset_Y = DisPlayPanel.Height / 2 - val - 10;
}
}
btn.SetValue(Canvas.TopProperty, val);
e.Handled = true;
}
}
private void SwiperBtn_MouseDown(object sender, MouseButtonEventArgs e)
{
isMouseDownSwiperBtn = true;
start_y = e.GetPosition(SwiperCanvas).Y;
SwiperBtn btn = (SwiperBtn)sender;
first = (double)btn.GetValue(Canvas.TopProperty);
}
/// <summary>
/// 添加滑块按钮
/// </summary>
/// <param name="ch"></param>
private void AddSwiperBtn(ChannelItem ch)
{
SwiperBtn btn = new SwiperBtn();
btn.Id = ch.Id;
Binding binding = new Binding {
Source = ch, Path = new PropertyPath("Color")
};
btn.SetBinding(SwiperBtn.colorProperty, binding);
Binding binding1 = new Binding {
Source = ch, Path = new PropertyPath("Name")
};
btn.SetBinding(SwiperBtn.nameProperty, binding1);
double val = (double)(DisPlayPanel.Height / 2 - 10 - ch.Offset_Y);
btn.SetValue(Canvas.TopProperty, val);
btn.PreviewMouseDown += SwiperBtn_MouseDown;
btn.PreviewMouseMove += SwiperBtn_MouseMove;
btn.PreviewMouseUp += SwiperBtn_MouseUp;
this.SwiperCanvas.Children.Add(btn);
}
