WP7 slider strange behavior

问题

I'm developing Windows Phone 7 app. I have slider control on several page. However, when I go to a certain page within my app, all my slider controls in every page behave strangely.

The symptom is that user can only drag the thumb on slider for very short range.

The certain page I mentioned has no problem with code and XAML. Why does it cause ALL sliders to behave wrongly ?

回答1:

The problem is that using toolkit Gesture will cause Slider to behave strangely. So when start manipulating on Slider, you should disable Gesture listener, then enable it when stop manipulating on Slider.

<Slider Height="84" Name="fixedSlider" ManipulationStarted="disableGestures" ManipulationCompleted="restoreGestures" />


GestureType prevGestureType;
private void disableGestures(object sender, ManipulationStartedEventArgs e) 
{
    prevGestureType = TouchPanel.EnabledGestures;
    TouchPanel.EnabledGestures = GestureType.None;
    fixedSlider.IsHitTestVisible = false;
}

private void restoreGestures(object sender, ManipulationCompletedEventArgs e) 
{
    TouchPanel.EnabledGestures = prevGestureType;
}

回答2:

Slider class has property SmallChange and if you look on the slider template, you will see, that when user tap on slider - value changes only on the small change. If you want to avoid this, you need to create custom slider behavior.

来源：https://stackoverflow.com/questions/13342825/wp7-slider-strange-behavior