zilinsoft
993f1ca1a9
------ #### SuperDesign V3.0.2412.2001 - *.[新增]新增程序更新日志设置和自动发布功能。 - *.[修复]修复Post数据格式不正确时双击文本框会导致软件闪退的BUG。
126 lines
5.1 KiB
C#
126 lines
5.1 KiB
C#
#region License
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/*
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MIT License
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Copyright(c) 2020 Petteri Kautonen
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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*/
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#endregion
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using System;
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using System.ComponentModel;
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using System.Runtime.InteropServices;
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using System.Windows.Forms;
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using ScintillaNET;
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namespace ScintillaDiff
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{
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/// <summary>
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/// An inherited class from the <see cref="Scintilla"/> which can synchronize vertical scroll bar position with another <see cref="Scintilla"/> control.
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/// Implements the <see cref="ScintillaNET.Scintilla" />
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/// </summary>
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/// <seealso cref="ScintillaNET.Scintilla" />
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public class ScrollSyncScintilla : Scintilla
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{
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// ReSharper disable once CommentTypo
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/// <summary>
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/// The WM_VSCROLL message is sent to a window when a scroll event occurs in the window's standard vertical scroll bar.
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/// This message is also sent to the owner of a vertical scroll bar control when a scroll event occurs in the control.
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/// <remarks>
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/// https://docs.microsoft.com/en-us/windows/desktop/controls/wm-vscroll
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/// </remarks>
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/// </summary>
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// ReSharper disable once InconsistentNaming
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private const int WM_VSCROLL = 0x115;
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// ReSharper disable once CommentTypo
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/// <summary>
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/// The WM_HSCROLL message is sent to a window when a scroll event occurs in the window's standard horizontal scroll bar.
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/// This message is also sent to the owner of a horizontal scroll bar control when a scroll event occurs in the control.
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/// <remarks>
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/// https://docs.microsoft.com/en-us/windows/desktop/controls/wm-hscroll
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/// </remarks>
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/// </summary>
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// ReSharper disable once InconsistentNaming
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private const int WM_HSCROLL = 0x114;
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/// <summary>
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/// The WM_MOUSEWHEEL message is Sent to the focus window when the mouse wheel is rotated.
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/// <remarks>
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/// https://docs.microsoft.com/en-us/windows/win32/inputdev/wm-mousewheel
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/// </remarks>
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/// </summary>
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// ReSharper disable once InconsistentNaming
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private const int WM_MOUSEWHEEL = 0x20a;
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/// <summary>
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/// The SendMessage Win32 function is used to send a specified message to a window or windows.
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/// <remarks>
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/// https://docs.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-sendmessage
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/// </remarks>
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/// </summary>
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[DllImport("user32.dll", CharSet = CharSet.Auto)]
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private static extern IntPtr SendMessage(IntPtr hWnd, int msg, IntPtr wp, IntPtr lp);
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/// <summary>
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/// Processes Windows messages.
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/// </summary>
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/// <param name="m">The Windows Message to process.</param>
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protected override void WndProc(ref Message m)
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{
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if (m.Msg == WM_MOUSEWHEEL)
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{
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// two casts to make this work with 32 bit and 64 bit params
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var wp = new IntPtr((int)(long)m.WParam < 0 ? 1 : 0);
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SendMessage(this.Handle, WM_VSCROLL, wp, new IntPtr(0));
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return;
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}
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base.WndProc(ref m);
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// vertical scrolling
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if (m.Msg == WM_VSCROLL && ScrollSync != null)
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{
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// get the first visible line of this control..
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int scrollTop = FirstVisibleLine;
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// set the value to the other Scintilla control..
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ScrollSync.FirstVisibleLine = scrollTop;
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}
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// horizontal scrolling
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if (m.Msg == WM_HSCROLL && ScrollSync != null)
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{
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// get the leftmost pixel
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int scrollLeft = XOffset;
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// set the value to the other Scintilla control..
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ScrollSync.XOffset = scrollLeft;
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}
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}
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/// <summary>
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/// Gets or sets the <see cref="Scintilla"/> to synchronize the vertical scroll bar with.
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/// </summary>
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[Browsable(true)]
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[Category("Miscellaneous")]
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[Description("Gets or sets the Scintilla to synchronize the vertical scroll bar with.")]
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public Scintilla ScrollSync { get; set; }
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}
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}
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