[英]Unable to scroll (broken TextBox) after Select and ChangeView in UWP
I just want to scroll to my regex result. 我只想滚动到我的正则表达式结果。 I notice that if I only use Select or only ChangeView , there is no error (but no result too).
我注意到,如果我仅使用Select或仅使用ChangeView,则没有错误(但也没有结果)。
private void showrez()
{
if (head != null)
{
ContentBox.Focus(FocusState.Programmatic);
ContentBox.Select(head.Index, head.Length);
var r = ContentBox.GetRectFromCharacterIndex(ContentBox.SelectionStart, false);
var grid = VisualTreeHelper.GetChild(ContentBox, 0);
for (var i = 0; i < VisualTreeHelper.GetChildrenCount(grid); i++)
{
object obj = VisualTreeHelper.GetChild(grid, i);
if (obj is ScrollViewer)
{
((ScrollViewer)obj).ChangeView(r.Left, r.Top, null);
break;
}
}
}
}
EDIT: 编辑:
I just checked this works without bugs , but used methods are obsolete. 我只是检查了这项工作是否没有错误,但是使用的方法已经过时了。
private void showrez()
{
if (head != null)
{
ContentBox.Focus(FocusState.Programmatic);
ContentBox.Select(head.Index, head.Length);
var r = ContentBox.GetRectFromCharacterIndex(ContentBox.SelectionStart, false);
var grid = VisualTreeHelper.GetChild(ContentBox, 0);
for (var i = 0; i < VisualTreeHelper.GetChildrenCount(grid); i++)
{
object obj = VisualTreeHelper.GetChild(grid, i);
if (obj is ScrollViewer)
{
//((ScrollViewer)obj).ChangeView(r.Left, r.Top, null);
((ScrollViewer)obj).ScrollToVerticalOffset(r.Top);
((ScrollViewer)obj).ScrollToHorizontalOffset(r.Left);
break;
}
}
}
}
When we use the ChangeView(IReference<Double>, IReference<Double>, IReference<Single>)
method it enable scrolling animation by default. 当我们使用
ChangeView(IReference<Double>, IReference<Double>, IReference<Single>)
方法时,默认情况下会启用滚动动画。 Please try to use the ChangeView(IReference<Double>, IReference<Double>, IReference<Single>, Boolean)
and we should be able to set true to disable zoom/pan animations while changing the view. 请尝试使用
ChangeView(IReference<Double>, IReference<Double>, IReference<Single>, Boolean)
并且我们应该能够将true设置为在更改视图时禁用缩放动画。 The default is false. 默认为false。
Foe example: 敌人的例子:
((ScrollViewer)obj).ChangeView(r.Left, r.Top, null,true);
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