问题描述
我发现VScrollBar(Visual Studio工具箱中的垂直滚动条)有一个奇怪的行为.问题是"如果我在滚动条上向下滑动，它会向上移动.如果我向上滑动，它会向下移动".
I found a strange behavior with VScrollBar (vertical scrollbar available in Visual Studio tool box). The problem is "if I swipe down on the scrollbar, it moves up. If I swipe up, it moves down".
1)将VScrollBar作为子级添加到任何用户控件中.
1) Add VScrollBar as a child to any user control.
2)在用户控件上向上或向下滑动(不在滚动条上).即使内容和VScrollBar之间没有任何编程连接，垂直滚动条也会朝相反的方向移动
2) Swipe up or down on the user control (not on scrollbar). Vertical scrollbar moves in opposite direction even if there isn't any programmatical connection between content and VScrollBar
1)将VScrollBar作为子级添加到任何用户控件中.
1) Add VScrollBar as a child to any user control.
2)在滚动条上滑动，它会在向下滑动时向上移动，在向下滑动时向下移动(正确行为)
2) Swipe on scrollbar, it will move up during swipe up and down during swipe down (correct behavior)
3)在用户控件上向上或向下滑动.垂直滚动条向相反方向移动
3) Swipe up or down on the user control. Vertical scrollbar moves in opposite direction
4)现在在垂直滚动条上向上或向下滑动.垂直滚动条开始向相反方向移动(错误行为，仅在错误编号:1之后发生)
4) Now swipe up or down on the vertical scrollbar. Vertical scrollbar starts moving in opposite direction (Buggy behavior, happens only after bug no: 1)
带有垂直滚动条的简单控件即可复制此行为
public class QuickViewer : Control
{
public QuickViewer()
{
// Designer generated code
// Copy pasted for illustration alone
this.vScrollBar1 = new System.Windows.Forms.VScrollBar();
this.SuspendLayout();
//
// vScrollBar1
//
this.vScrollBar1.Location = new System.Drawing.Point(420, 4);
this.vScrollBar1.Name = "vScrollBar1";
this.vScrollBar1.Size = new Size(this.vScrollBar1.Width, 292);
//
// QuickViewer
//
this.Controls.Add(this.vScrollBar1);
this.Name = "QuickViewer";
this.Size = new System.Drawing.Size(441, 296);
this.vScrollBar1.Value = 5;
this.ResumeLayout(false);
}
protected override void OnPaint(PaintEventArgs e)
{
//My actual control is different. I prepared a simple control to replicate the buggy behavior of VScrollBar
//Control border
Pen borderPen = new Pen(Color.LawnGreen, 5);
e.Graphics.DrawRectangle(borderPen, ClientRectangle);
borderPen.Dispose();
//View area
Rectangle rect = new Rectangle(ClientRectangle.Location, ClientRectangle.Size);
rect.Inflate(-25, -10);
e.Graphics.FillRectangle(Brushes.White, rect);
e.Graphics.DrawRectangle(Pens.Black, rect);
this.Font = new System.Drawing.Font("Segoe UI", 12, FontStyle.Bold);
StringFormat format = new StringFormat() { Alignment = StringAlignment.Center };
e.Graphics.DrawString("Quick viewer", this.Font, Brushes.Black, rect, format);
string content = "This is a control created to illustrate the bug in VScrollBar." +
"\n Control area refers to the area with white background" +
"\n Control and Vertical Scrollbar are not programatically connected with each other."
+ "But still VScrollBar moves if you swipe on control area";
Font font = new System.Drawing.Font("Segoe UI", 12, FontStyle.Italic);
rect.Y += 20;
e.Graphics.DrawString(content, font, Brushes.Black, rect, format);
font.Dispose();
format.Dispose();
base.OnPaint(e);
}
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.IContainer components = null;
/// <summary>
/// Clean up any resources being used.
/// </summary>
/// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}
private System.Windows.Forms.VScrollBar vScrollBar1;
}
问题:
有什么办法可以克服这种行为或错误?我希望滚动条在向下滑动时向下移动并在向上滑动时向上移动.滑过内容时不应有任何滚动
Is there any way to overcome this behavior or bug ? I want the scrollbar to move down while swiping down and move up while swiping up. There should not be any scrolling when swiping over the content
推荐答案
根据Hans Passants的评论，它只是一个系统设置(以注册表项的形式):
As per Hans Passants comment its just a system setting (in the form of a registry key):
答案实际上已经在SuperUser上了:
The answer is actually over at SuperUser:
https://superuser.com/questions/310681/inverting-direction-of -鼠标滚动轮
根据需要在C#中:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using Microsoft.Win32;
using System.Diagnostics;
using System.Security.Principal;
namespace WindowsFormsApplication1 {
public partial class Form1 : Form {
public Form1() {
InitializeComponent();
}
private Flippable[] flippable;
private void Form1_Load(object sender, EventArgs e) {
WindowsPrincipal pricipal = new WindowsPrincipal(WindowsIdentity.GetCurrent());
bool hasAdministrativeRight = pricipal.IsInRole(WindowsBuiltInRole.Administrator);
if (!hasAdministrativeRight) {
RunElevated(Application.ExecutablePath);
this.Close();
Application.Exit();
}
//probably only want to flip mice.
flippable = getFlippable("hid.mousedevice");
dgv_flippable.DataSource = flippable;
foreach (var col in dgv_flippable.Columns.OfType<DataGridViewCheckBoxColumn>()) {
col.TrueValue = true;
col.FalseValue = false;
col.IndeterminateValue = null;
}
}
private static bool RunElevated(string fileName)
{
//MessageBox.Show("Run: " + fileName);
ProcessStartInfo processInfo = new ProcessStartInfo();
processInfo.UseShellExecute = true;
processInfo.Verb = "runas";
processInfo.FileName = fileName;
try
{
Process.Start(processInfo);
return true;
}
catch (Win32Exception)
{
//Do nothing. Probably the user canceled the UAC window
}
return false;
}
private Flippable[] getFlippable(string filter) {
List<Flippable> flips = new List<Flippable>();
using (RegistryKey hid = Registry.LocalMachine.OpenSubKey(@"SYSTEM\CurrentControlSet\Enum\HID\",false)) {
foreach (string devicekn in hid.GetSubKeyNames()) {
using (RegistryKey device = hid.OpenSubKey(devicekn,false)) {
foreach (string devicekn2 in device.GetSubKeyNames()) {
using (RegistryKey device2 = device.OpenSubKey(devicekn2,false)) {
using (RegistryKey devparam = device2.OpenSubKey("Device Parameters",true)) {
if (devparam != null) {
flips.Add(new Flippable(new string[] { devicekn, devicekn2 }, device2, devparam, tmr_popup));
}
}
}
}
}
}
}
if (filter != null) {
return flips.Where(f=>f.name.Contains(filter)).ToArray();
}
return flips.ToArray();
}
private void dgv_flippable_MouseUp(object sender, MouseEventArgs e) {
dgv_flippable.EndEdit();
}
private void button1_Click(object sender, EventArgs e) {
flippable = getFlippable(null);
dgv_flippable.DataSource = flippable;
}
private void btn_flip_Click(object sender, EventArgs e) {
foreach (var f in flippable) {
f.vertical = true;
f.horizontal = true;
}
dgv_flippable.DataSource = null;
dgv_flippable.DataSource = flippable;
}
private void btn_normal_Click(object sender, EventArgs e) {
foreach (var f in flippable) {
f.vertical = false;
f.horizontal = false;
}
dgv_flippable.DataSource = null;
dgv_flippable.DataSource = flippable;
}
private void tmr_popup_Tick(object sender, EventArgs e) {
tmr_popup.Enabled = false;
notifyIcon1.ShowBalloonTip(99999999);
}
}
public class Flippable {
public Flippable(string[] keyPath, RegistryKey deviceKey, RegistryKey devparam, Timer timer) {
this._keyPath = keyPath;
IEnumerable<bool?> flipValues = Flippable.valueNames
.Select(v => onlyIntBool(devparam.GetValue(v, null)));
this.name = (string)deviceKey.GetValue("DeviceDesc");
this._vertical = flipValues.ElementAt(0);
this._horizontal = flipValues.ElementAt(1);
this._timer = timer;
}
private bool? onlyIntBool(object value) {
try {
return value == null ? null : (bool?)(((int)value) != 0);
} catch {
return null;
}
}
public static string[] valueNames = new string[] { "FlipFlopWheel", "FlipFlopHScroll" };
public string name { get; private set; }
private string[] _keyPath;
private bool? _vertical;
private bool? _horizontal;
Timer _timer;
public bool? vertical { set { flip(Flippable.valueNames[0], value); _vertical = value; } get { return _vertical; } }
public bool? horizontal { set { flip(Flippable.valueNames[1], value); _horizontal = value; } get { return _horizontal; } }
public void flip(string valueName, bool? value) {
using (RegistryKey hid = Registry.LocalMachine.OpenSubKey(@"SYSTEM\CurrentControlSet\Enum\HID\", false)) {
using (RegistryKey device = hid.OpenSubKey(_keyPath[0], false)) {
using (RegistryKey device2 = device.OpenSubKey(_keyPath[1], false)) {
using (RegistryKey devparam = device2.OpenSubKey("Device Parameters", true)) {
if (value == null) {
devparam.DeleteValue(valueName);
} else {
devparam.SetValue(valueName, value == true ? 1 : 0);
_timer.Enabled = true;
}
}
}
}
}
}
}
}
REF: https://github.com/jamie-pate/flipflop-windows-wheel/blob/master/Form1.cs
这篇关于Microsoft VSrollBar行为或带触摸屏的错误-Windows窗体的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！