81 lines
2.5 KiB
C#
81 lines
2.5 KiB
C#
|
using System.Windows;
|
||
|
|
using System.Windows.Controls;
|
||
|
|
using System.Windows.Input;
|
||
|
|
using PCL.Core.UI.Controls;
|
||
|
|
|
||
|
|
namespace PCL;
|
||
|
|
|
||
|
|
public class MyScrollViewer : ScrollViewer
|
||
|
|
{
|
||
|
|
private double realOffset;
|
||
|
|
|
||
|
|
public MyScrollBar scrollBar;
|
||
|
|
|
||
|
|
public MyScrollViewer()
|
||
|
|
{
|
||
|
|
PreviewMouseWheel += MyScrollViewer_PreviewMouseWheel;
|
||
|
|
ScrollChanged += MyScrollViewer_ScrollChanged;
|
||
|
|
IsVisibleChanged += MyScrollViewer_IsVisibleChanged;
|
||
|
|
Loaded += (_, _) => Load();
|
||
|
|
PreviewGotKeyboardFocus += MyScrollViewer_PreviewGotKeyboardFocus;
|
||
|
|
}
|
||
|
|
|
||
|
|
public double DeltaMult { get; set; } = 1d;
|
||
|
|
|
||
|
|
private void MyScrollViewer_PreviewMouseWheel(object sender, MouseWheelEventArgs e)
|
||
|
|
{
|
||
|
|
if (e.Delta == 0 || ScrollableHeight <= 0d)
|
||
|
|
return;
|
||
|
|
|
||
|
|
var src = e.Source;
|
||
|
|
if (Content is FrameworkElement element && element.TemplatedParent is null)
|
||
|
|
{
|
||
|
|
switch (src)
|
||
|
|
{
|
||
|
|
case ComboBox { IsDropDownOpen: true }:
|
||
|
|
case TextBox { AcceptsReturn: true }:
|
||
|
|
case ComboBoxItem:
|
||
|
|
case CheckBox:
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
e.Handled = true;
|
||
|
|
PerformVerticalOffsetDelta(-e.Delta);
|
||
|
|
|
||
|
|
Tooltip.Dismiss();
|
||
|
|
}
|
||
|
|
|
||
|
|
public void PerformVerticalOffsetDelta(double delta)
|
||
|
|
{
|
||
|
|
ModAnimation.AniStart(ModAnimation.AaDouble(animDelta =>
|
||
|
|
{
|
||
|
|
realOffset = ModBase.MathClamp(realOffset + (double)animDelta, 0d, ExtentHeight - ActualHeight);
|
||
|
|
ScrollToVerticalOffset(realOffset);
|
||
|
|
}, delta * DeltaMult, 300, 0, new ModAnimation.AniEaseOutFluent((ModAnimation.AniEasePower)6), false));
|
||
|
|
}
|
||
|
|
|
||
|
|
private void MyScrollViewer_ScrollChanged(object sender, ScrollChangedEventArgs e)
|
||
|
|
{
|
||
|
|
realOffset = VerticalOffset;
|
||
|
|
if (ModMain.frmMain is not null &&
|
||
|
|
(e.VerticalChange != 0 || e.ViewportHeightChange != 0))
|
||
|
|
ModMain.frmMain.BtnExtraBack.ShowRefresh();
|
||
|
|
}
|
||
|
|
|
||
|
|
private void MyScrollViewer_IsVisibleChanged(object sender, DependencyPropertyChangedEventArgs e)
|
||
|
|
{
|
||
|
|
ModMain.frmMain.BtnExtraBack.ShowRefresh();
|
||
|
|
}
|
||
|
|
|
||
|
|
private void Load()
|
||
|
|
{
|
||
|
|
scrollBar = (MyScrollBar)GetTemplateChild("PART_VerticalScrollBar");
|
||
|
|
}
|
||
|
|
|
||
|
|
private void MyScrollViewer_PreviewGotKeyboardFocus(object sender, KeyboardFocusChangedEventArgs e)
|
||
|
|
{
|
||
|
|
if (e.NewFocus is MySlider)
|
||
|
|
e.Handled = true; // #3854，阻止获得焦点时自动滚动
|
||
|
|
}
|
||
|
|
}
|