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fix:issue #358

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This commit is contained in:
CJKmkp
2026-02-15 01:57:12 +08:00
parent 9b55eff11d
commit 7b6b2a30e6
2 changed files with 97 additions and 9 deletions
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Ink Canvas/MainWindow.xaml.cs
+43 -8
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@@ -202,13 +202,19 @@ namespace Ink_Canvas
ShowPage(currentPageIndex);
// 手动实现触摸滑动
const double TouchTapMovementThreshold = 15.0;
double leftTouchStartY = 0;
double leftTouchStartX = 0;
double leftScrollStartOffset = 0;
bool leftIsTouching = false;
bool leftTouchDidScroll = false;
BlackBoardLeftSidePageListScrollViewer.TouchDown += (s, e) =>
{
leftIsTouching = true;
leftTouchStartY = e.GetTouchPoint(BlackBoardLeftSidePageListScrollViewer).Position.Y;
leftTouchDidScroll = false;
var pt = e.GetTouchPoint(BlackBoardLeftSidePageListScrollViewer).Position;
leftTouchStartX = pt.X;
leftTouchStartY = pt.Y;
leftScrollStartOffset = BlackBoardLeftSidePageListScrollViewer.VerticalOffset;
BlackBoardLeftSidePageListScrollViewer.CaptureTouch(e.TouchDevice);
e.Handled = true;
@@ -217,25 +223,42 @@ namespace Ink_Canvas
{
if (leftIsTouching)
{
double currentY = e.GetTouchPoint(BlackBoardLeftSidePageListScrollViewer).Position.Y;
double delta = leftTouchStartY - currentY;
BlackBoardLeftSidePageListScrollViewer.ScrollToVerticalOffset(leftScrollStartOffset + delta);
var pt = e.GetTouchPoint(BlackBoardLeftSidePageListScrollViewer).Position;
double deltaY = leftTouchStartY - pt.Y;
double deltaX = pt.X - leftTouchStartX;
if (!leftTouchDidScroll && (Math.Abs(deltaY) > TouchTapMovementThreshold || Math.Abs(deltaX) > TouchTapMovementThreshold))
leftTouchDidScroll = true;
if (leftTouchDidScroll)
BlackBoardLeftSidePageListScrollViewer.ScrollToVerticalOffset(leftScrollStartOffset + deltaY);
e.Handled = true;
}
};
BlackBoardLeftSidePageListScrollViewer.TouchUp += (s, e) =>
{
if (leftIsTouching && !leftTouchDidScroll)
{
var pt = e.GetTouchPoint(BlackBoardLeftSidePageListScrollViewer).Position;
double dx = pt.X - leftTouchStartX, dy = pt.Y - leftTouchStartY;
if (dx * dx + dy * dy <= TouchTapMovementThreshold * TouchTapMovementThreshold)
TrySwitchWhiteboardPageByTouchPoint(BlackBoardLeftSidePageListView, BlackBoardLeftSidePageListScrollViewer, pt, true);
}
leftIsTouching = false;
leftTouchDidScroll = false;
BlackBoardLeftSidePageListScrollViewer.ReleaseTouchCapture(e.TouchDevice);
e.Handled = true;
};
double rightTouchStartY = 0;
double rightTouchStartX = 0;
double rightScrollStartOffset = 0;
bool rightIsTouching = false;
bool rightTouchDidScroll = false;
BlackBoardRightSidePageListScrollViewer.TouchDown += (s, e) =>
{
rightIsTouching = true;
rightTouchStartY = e.GetTouchPoint(BlackBoardRightSidePageListScrollViewer).Position.Y;
rightTouchDidScroll = false;
var pt = e.GetTouchPoint(BlackBoardRightSidePageListScrollViewer).Position;
rightTouchStartX = pt.X;
rightTouchStartY = pt.Y;
rightScrollStartOffset = BlackBoardRightSidePageListScrollViewer.VerticalOffset;
BlackBoardRightSidePageListScrollViewer.CaptureTouch(e.TouchDevice);
e.Handled = true;
@@ -244,15 +267,27 @@ namespace Ink_Canvas
{
if (rightIsTouching)
{
double currentY = e.GetTouchPoint(BlackBoardRightSidePageListScrollViewer).Position.Y;
double delta = rightTouchStartY - currentY;
BlackBoardRightSidePageListScrollViewer.ScrollToVerticalOffset(rightScrollStartOffset + delta);
var pt = e.GetTouchPoint(BlackBoardRightSidePageListScrollViewer).Position;
double deltaY = rightTouchStartY - pt.Y;
double deltaX = pt.X - rightTouchStartX;
if (!rightTouchDidScroll && (Math.Abs(deltaY) > TouchTapMovementThreshold || Math.Abs(deltaX) > TouchTapMovementThreshold))
rightTouchDidScroll = true;
if (rightTouchDidScroll)
BlackBoardRightSidePageListScrollViewer.ScrollToVerticalOffset(rightScrollStartOffset + deltaY);
e.Handled = true;
}
};
BlackBoardRightSidePageListScrollViewer.TouchUp += (s, e) =>
{
if (rightIsTouching && !rightTouchDidScroll)
{
var pt = e.GetTouchPoint(BlackBoardRightSidePageListScrollViewer).Position;
double dx = pt.X - rightTouchStartX, dy = pt.Y - rightTouchStartY;
if (dx * dx + dy * dy <= TouchTapMovementThreshold * TouchTapMovementThreshold)
TrySwitchWhiteboardPageByTouchPoint(BlackBoardRightSidePageListView, BlackBoardRightSidePageListScrollViewer, pt, false);
}
rightIsTouching = false;
rightTouchDidScroll = false;
BlackBoardRightSidePageListScrollViewer.ReleaseTouchCapture(e.TouchDevice);
e.Handled = true;
};