private void SetHScroll(SyncTextBox toSync, int value)
{
var wParam = new Win32.WParam((int)Win32.ScrollBarCommands.SB_THUMBPOSITION, value);
var msg = new Message();
msg.HWnd = toSync.Handle;
msg.Msg = Win32.WM_HSCROLL;
msg.WParam = (IntPtr)wParam.Ptr();
msg.LParam = (IntPtr)0;
toSync.WndProc(ref msg);
}
private void ProcessSelection(SyncTextBox toSync, int line)
{
if (!blockSel && line != selLine)
{
toSync.childLock = true;
toSync.SelectionLength = 0;
int childIndex = toSync.GetFirstCharIndexFromLine(line);
if (line < toSync.Lines.Length && childIndex >= 0)
{
toSync.SelectionStart = childIndex;
}
toSync.childLock = false;
}
int thisScroll = Win32.GetScrollPos(Handle, Orientation.Horizontal);
int childScroll = Win32.GetScrollPos(toSync.Handle, Orientation.Horizontal);
if (childScroll != thisScroll)
{
toSync.childLock = true;
SetHScroll(toSync, thisScroll);
toSync.childLock = false;
}
}
private bool ProcessMessage(SyncTextBox toSync, ref Message message)
{
var wParam = new Win32.WParam(message.WParam);
switch (message.Msg)
{
case Win32.WM_KEYDOWN:
case Win32.WM_KEYUP:
switch (wParam.Message)
{
case 0x21:
case 0x22:
blockSel = true;
base.WndProc(ref message);
message.HWnd = toSync.Handle;
toSync.childLock = true;
toSync.WndProc(ref message);
toSync.childLock = false;
blockSel = false;
return(false);
}
break;
case Win32.WM_VSCROLL:
switch ((Win32.ScrollBarCommands)wParam.Message)
{
case Win32.ScrollBarCommands.SB_LINEUP:
case Win32.ScrollBarCommands.SB_LINEDOWN:
case Win32.ScrollBarCommands.SB_PAGEUP:
case Win32.ScrollBarCommands.SB_PAGEDOWN:
base.WndProc(ref message);
message.HWnd = toSync.Handle;
toSync.childLock = true;
toSync.WndProc(ref message);
toSync.childLock = false;
return(false);
case Win32.ScrollBarCommands.SB_THUMBTRACK:
toSync.childLock = true;
SetVScroll(toSync, wParam.Value);
toSync.childLock = false;
break;
case Win32.ScrollBarCommands.SB_THUMBPOSITION:
case Win32.ScrollBarCommands.SB_ENDSCROLL:
break;
default:
break;
}
break;
case Win32.WM_HSCROLL:
switch ((Win32.ScrollBarCommands)wParam.Message)
{
case Win32.ScrollBarCommands.SB_LINELEFT:
case Win32.ScrollBarCommands.SB_LINERIGHT:
case Win32.ScrollBarCommands.SB_PAGELEFT:
case Win32.ScrollBarCommands.SB_PAGERIGHT:
base.WndProc(ref message);
message.HWnd = toSync.Handle;
toSync.childLock = true;
toSync.WndProc(ref message);
toSync.childLock = false;
return(false);
case Win32.ScrollBarCommands.SB_THUMBTRACK:
toSync.childLock = true;
SetHScroll(toSync, wParam.Value);
toSync.childLock = false;
break;
case Win32.ScrollBarCommands.SB_THUMBPOSITION:
case Win32.ScrollBarCommands.SB_ENDSCROLL:
break;
default:
break;
}
break;
case Win32.WM_MOUSEWHEEL:
int thisScroll = Win32.GetScrollPos((IntPtr)Handle, Orientation.Vertical);
thisScroll -= (wParam.Value / 40) * (PreferredSize.Height / Lines.Length - 1);
if (thisScroll < 0)
{
thisScroll = 0;
}
SetVScroll(this, thisScroll);
toSync.childLock = true;
SetVScroll(toSync, thisScroll);
toSync.childLock = false;
return(false);
}
return(true);
}
