private Boolean HitTest(Orientation orient)
{
Point pt = new Point();
RECT tr = new RECT();
RECT tp = new RECT();
SCROLLBARINFO sb = new SCROLLBARINFO();
sb.cbSize = Marshal.SizeOf(sb);
GetCursorPos(ref pt);
if (orient == Orientation.Horizontal)
{
GetScrollBarInfo(_hControlWnd, OBJID_HSCROLL, ref sb);
tr = sb.rcScrollBar;
tp = tr;
if (PtInRect(ref tr, pt))
{
return(true);
}
}
else
{
GetScrollBarInfo(_hControlWnd, OBJID_VSCROLL, ref sb);
tr = sb.rcScrollBar;
tp = tr;
if (PtInRect(ref tr, pt))
{
return(true);
}
}
return(false);
}
public static int AutoCalcWidth(this ListView listView)
{
var sbi = new SCROLLBARINFO();
sbi.cbSize = Marshal.SizeOf(sbi);
if (GetScrollBarInfo(listView.Handle, (uint)ScrollObjMask.OBJID_HSCROLL, ref sbi) != 0)
{
const int minWidth = 100;
var borderWidth = SystemInformation.Border3DSize.Width;
var scrollBarWidth = SystemInformation.VerticalScrollBarWidth;
var scrollBars = GetVisibleScrollbars(listView);
if (scrollBars == ScrollBars.Both || scrollBars == ScrollBars.Horizontal)
{
scrollBarWidth = SystemInformation.VerticalScrollBarWidth;
}
else
{
scrollBarWidth = 0;
}
int state = sbi.rgstate[0];
var iWidth = 0;
// var iWidth = si.nMax - si.nMin + 2 * borderWidth + scrollBarWidth + 2;
return(Math.Max(minWidth, iWidth));
}
var error = Marshal.GetLastWin32Error();
throw new Exception($"Pinvoked GetScrollBarInfo error:{error}");
}
public bool PreFilterMessage(ref Message m)
{
Point point;
switch (m.Msg)
{
case 0x201: //WM_LBUTTONDOWN
//Debug.WriteLine(m.HWnd.ToString("X8") + "\t" + m.WParam + "\t" + GetPoint(m.LParam));
if ((int)m.WParam != 1)
{
break;
} //仅处理单纯的左键单击
var c = Control.FromHandle(m.HWnd);
if (c != null && CanDrag(c, (point = GetPoint(m.LParam))))
{
return(DoDrag(c, point, true));
}
break;
case 0xA1: //WM_NCLBUTTONDOWN
var ht = (int)m.WParam;
if (ht == 5 /*HTMENU*/) //点到MainMenu时
{
//判断是否点到菜单项。若不是或菜单项不可用则拖拽
//点击菜单时m.HWnd为窗体句柄而非菜单句柄
point = GetPoint(m.LParam);
var menu = GetMenu(m.HWnd);
var item = MenuItemFromPoint(m.HWnd, menu, (POINT)point);
if (item == -1 ||
(GetMenuState(menu, item, 0x400 /*MF_BYPOSITION*/) & 2 /*MF_DISABLED*/) == 2)
{
return(DoDrag(Control.FromHandle(m.HWnd), point, false));
}
}
else if (ht == 4 /*HTSIZE*/ || ht == 18 /*HTBORDER*/) //点到两个滚动条右下空白、控件边框时
{
return(DoDrag(Control.FromHandle(m.HWnd), GetPoint(m.LParam), false));
}
else if (ht == 6 /*HTHSCROLL*/ || ht == 7 /*HTVSCROLL*/) //点到滚动条时
{
//获取滚动条状态，若处于无效则拖拽
//OBJID_HSCROLL=0xFFFFFFFA
//OBJID_VSCROLL=0xFFFFFFFB
var idObject = unchecked ((int)(ht + 0xFFFFFFF4));
SCROLLBARINFO sbi = new SCROLLBARINFO {
cbSize = SizeOfSCROLLBARINFO
};
if (GetScrollBarInfo(m.HWnd, idObject, ref sbi) &&
sbi.scrollBarInfo == 1 /*STATE_SYSTEM_UNAVAILABLE*/)
{
return(DoDrag(Control.FromHandle(m.HWnd), GetPoint(m.LParam), false));
}
}
break;
}
return(false);
}
private void DrawScrollBar()
{
RECT tr = new RECT();
IntPtr hdc = IntPtr.Zero;
SCROLLBARINFO sb = new SCROLLBARINFO();
sb.cbSize = Marshal.SizeOf(sb);
if (HasHorizontal())
{
GetScrollBarInfo(_hControlWnd, OBJID_HSCROLL, ref sb);
tr = sb.rcScrollBar;
OffsetRect(ref tr, -tr.Left, -tr.Top);
hdc = GetDC(_hHorizontalMaskWnd);
Boolean isMouseOver = HitTest(Orientation.Horizontal);
Boolean isClick = IsLeftKeyPressed();
if (isMouseOver == true)
{
_isFocus = true;
}
using (Graphics g = Graphics.FromHdc(hdc))
{
DrawHorizontalScrollBar(g, tr.Right, tr.Bottom, sb.xyThumbTop, sb.xyThumbBottom, _iArrowCx,
isMouseOver, isClick);
}
ReleaseDC(_hHorizontalMaskWnd, hdc);
}
if (HasSizer())
{
hdc = GetDC(_hSizerMaskWnd);
using (Graphics g = Graphics.FromHdc(hdc))
{
DrawSizer(g, _iArrowCx, _iArrowCy);
}
ReleaseDC(_hSizerMaskWnd, hdc);
}
if (HasVertical())
{
GetScrollBarInfo(_hControlWnd, OBJID_VSCROLL, ref sb);
tr = sb.rcScrollBar;
OffsetRect(ref tr, -tr.Left, -tr.Top);
Boolean isMouseOver = HitTest(Orientation.Vertical);
Boolean isClick = IsLeftKeyPressed();
if (isMouseOver == true)
{
_isFocus = true;
}
hdc = GetDC(_hVerticalMaskWnd);
using (Graphics g = Graphics.FromHdc(hdc))
{
DrawVerticalScrollBar(g, tr.Right, tr.Bottom, sb.xyThumbTop, sb.xyThumbBottom, _iArrowCy,
isMouseOver, isClick);
}
ReleaseDC(_hVerticalMaskWnd, hdc);
}
}
private SCROLLBARINFO GetScrollBarInfo(IntPtr hWnd, uint objid)
{
SCROLLBARINFO sbi = new SCROLLBARINFO();
sbi.cbSize = Marshal.SizeOf(sbi);
NativeMethods.GetScrollBarInfo(hWnd, objid, ref sbi);
return(sbi);
}
private SCROLLBARINFO GetScrollBarInfo(IntPtr hWnd)
{
SCROLLBARINFO scrollbarinfo = new SCROLLBARINFO();
scrollbarinfo = new SCROLLBARINFO {
cbSize = Marshal.SizeOf(scrollbarinfo)
};
Win32.NativeMethods.SendMessage(hWnd, 0xeb, 0, ref scrollbarinfo);
return(scrollbarinfo);
}
private SCROLLBARINFO GetScrollBarInfo(IntPtr hWnd, uint objid)
{
SCROLLBARINFO scrollbarinfo = new SCROLLBARINFO();
scrollbarinfo = new SCROLLBARINFO {
cbSize = Marshal.SizeOf(scrollbarinfo)
};
Win32.NativeMethods.GetScrollBarInfo(hWnd, objid, ref scrollbarinfo);
return(scrollbarinfo);
}
/// <summary>
/// Scroll to the bottom of the current text.
/// </summary>
public void ScrollToBottom()
{
SCROLLBARINFO sbi = GetBars();
if (sbi.rgstate[0] == 0)
{
SCROLLINFO si = GetScroll();
SendMessage(this.Handle, EM_SETSCROLLPOS, 0, new POINT(0, si.nMax - (int)si.nPage + 5));
}
}
private SCROLLBARINFO GetScrollBarInfo(IntPtr hWnd)
{
SCROLLBARINFO sbi = new SCROLLBARINFO();
sbi.cbSize = Marshal.SizeOf(sbi);
NativeMethods.SendMessage(
hWnd,
SBM.SBM_GETSCROLLBARINFO,
0,
ref sbi);
return(sbi);
}
private SCROLLBARINFO GetBars()
{
SCROLLBARINFO si = new SCROLLBARINFO();
si.cbSize = Marshal.SizeOf(si);
int ret = GetScrollBarInfo(this.Handle, OBJID_VSCROLL, ref si);
if (ret == 0)
{
Marshal.ThrowExceptionForHR(Marshal.GetHRForLastWin32Error());
}
return(si);
}
public static bool IsVScrollBarVisible(Control control)
{
var scrollbarInfo = new SCROLLBARINFO();
scrollbarInfo.cbSize = (UInt32)Marshal.SizeOf(scrollbarInfo);
int result = GetScrollBarInfo(control.Handle, NativeMethods.OBJID_VSCROLL, ref scrollbarInfo);
if (result == 0)
{
throw LastWin32Error();
}
else
{
return(scrollbarInfo.rgstate[0] != STATE_SYSTEM_INVISIBLE);
}
}
protected override void OnSelectedIndexChanged(EventArgs e)
{
base.OnSelectedIndexChanged (e);
SCROLLBARINFO psbi = new SCROLLBARINFO();
psbi.cbSize = Marshal.SizeOf(psbi);
int nResult = GetScrollBarInfo(this.Handle, OBJID_VSCROLL, ref psbi); //"this" is a scrollbar
if (nResult == 0)
{
int nLatError = Marshal.GetLastWin32Error(); // in kernel32.dll
}
fCheck=true;
oldval=psbi.xyThumbTop;
Console.WriteLine(psbi.xyThumbTop.ToString());
}
public static int CalculateRichTextHeight(RichTextBox _rtb)
{
int nHeight = 0;
SCROLLBARINFO psbi = new SCROLLBARINFO();
psbi.cbSize = Marshal.SizeOf(psbi);
_rtb.ScrollBars = RichTextBoxScrollBars.Vertical;
int nResult = GetScrollBarInfo(_rtb.Handle, OBJID_VSCROLL, ref psbi);
if (psbi.rgstate[0] == 0)
{
int nMin = 0, nMax = 0;
GetScrollRange(_rtb.Handle, SB_VERT, out nMin, out nMax);
nHeight = (nMax - nMin);
}
return(nHeight);
}
private void ResizeMask()
{
RECT tr = new RECT();
SCROLLBARINFO sb = new SCROLLBARINFO();
sb.cbSize = Marshal.SizeOf(sb);
IntPtr hParent = GetParent(_hControlWnd);
Point pt = new Point();
if (HasVertical())
{
GetScrollBarInfo(_hControlWnd, OBJID_VSCROLL, ref sb);
tr = sb.rcScrollBar;
pt.X = tr.Left;
pt.Y = tr.Top;
ScreenToClient(hParent, ref pt);
SetWindowPos(_hVerticalMaskWnd, IntPtr.Zero, pt.X, pt.Y, tr.Right - tr.Left, tr.Bottom - tr.Top, SWP_NOACTIVATE | SWP_NOOWNERZORDER | SWP_NOZORDER | SWP_SHOWWINDOW);
}
if (HasHorizontal())
{
GetScrollBarInfo(_hControlWnd, OBJID_HSCROLL, ref sb);
tr = sb.rcScrollBar;
pt.X = tr.Left;
pt.Y = tr.Top;
ScreenToClient(hParent, ref pt);
SetWindowPos(_hHorizontalMaskWnd, IntPtr.Zero, pt.X, pt.Y, tr.Right - tr.Left, tr.Bottom - tr.Top, SWP_NOACTIVATE | SWP_NOOWNERZORDER | SWP_NOZORDER | SWP_SHOWWINDOW);
}
if (HasSizer())
{
GetScrollBarInfo(_hControlWnd, OBJID_HSCROLL, ref sb);
tr = new RECT(sb.rcScrollBar.Right, sb.rcScrollBar.Top, sb.rcScrollBar.Right + _iArrowCx, sb.rcScrollBar.Bottom);
pt.X = tr.Left;
pt.Y = tr.Top;
ScreenToClient(hParent, ref pt);
SetWindowPos(_hSizerMaskWnd, IntPtr.Zero, pt.X, pt.Y, tr.Right - tr.Left, tr.Bottom - tr.Top, SWP_NOACTIVATE | SWP_NOOWNERZORDER | SWP_NOZORDER | SWP_SHOWWINDOW);
}
}
private void reSizeMask()
{
RECT tr = new RECT();
SCROLLBARINFO sb = new SCROLLBARINFO();
sb.cbSize = Marshal.SizeOf(sb);
IntPtr hParent = GetParent(_hControlWnd);
Point pt = new Point();
if (hasVertical())
{
GetScrollBarInfo(_hControlWnd, OBJID_VSCROLL, ref sb);
tr = sb.rcScrollBar;
pt.X = tr.Left;
pt.Y = tr.Top;
ScreenToClient(hParent, ref pt);
SetWindowPos(_hVerticalMaskWnd, IntPtr.Zero, pt.X, pt.Y, tr.Right - tr.Left, tr.Bottom - tr.Top, SWP_NOACTIVATE | SWP_NOOWNERZORDER | SWP_NOZORDER | SWP_SHOWWINDOW);
}
if (hasHorizontal())
{
GetScrollBarInfo(_hControlWnd, OBJID_HSCROLL, ref sb);
tr = sb.rcScrollBar;
pt.X = tr.Left;
pt.Y = tr.Top;
ScreenToClient(hParent, ref pt);
SetWindowPos(_hHorizontalMaskWnd, IntPtr.Zero, pt.X, pt.Y, tr.Right - tr.Left, tr.Bottom - tr.Top, SWP_NOACTIVATE | SWP_NOOWNERZORDER | SWP_NOZORDER | SWP_SHOWWINDOW);
}
if (hasSizer())
{
GetScrollBarInfo(_hControlWnd, OBJID_HSCROLL, ref sb);
tr = new RECT(sb.rcScrollBar.Right, sb.rcScrollBar.Top, sb.rcScrollBar.Right + _iArrowCx, sb.rcScrollBar.Bottom);
pt.X = tr.Left;
pt.Y = tr.Top;
ScreenToClient(hParent, ref pt);
SetWindowPos(_hSizerMaskWnd, IntPtr.Zero, pt.X, pt.Y, tr.Right - tr.Left, tr.Bottom - tr.Top, SWP_NOACTIVATE | SWP_NOOWNERZORDER | SWP_NOZORDER | SWP_SHOWWINDOW);
}
}
private SB_HITEST scrollbarHitTest(Orientation orient)
{
Point pt = new Point();
RECT tr = new RECT();
RECT tp = new RECT();
SCROLLBARINFO sb = new SCROLLBARINFO();
sb.cbSize = Marshal.SizeOf(sb);
GetCursorPos(ref pt);
if (orient == Orientation.Horizontal)
{
GetScrollBarInfo(_hControlWnd, OBJID_HSCROLL, ref sb);
tr = sb.rcScrollBar;
//OffsetRect(ref tr, -tr.Left, -tr.Top);
tp = tr;
if (PtInRect(ref tr, pt))
{
// left arrow
tp.Right = tp.Left + _iArrowCx;
if (PtInRect(ref tp, pt))
return SB_HITEST.leftArrow;
// right arrow
tp.Left = tr.Right - _iArrowCx;
tp.Right = tr.Right;
if (PtInRect(ref tp, pt))
return SB_HITEST.rightArrow;
// button
tp.Left = tr.Left + sb.xyThumbTop;
tp.Right = tr.Left + sb.xyThumbBottom;
if (PtInRect(ref tp, pt))
return SB_HITEST.button;
// track
return SB_HITEST.track;
}
}
else
{
GetScrollBarInfo(_hControlWnd, OBJID_VSCROLL, ref sb);
tr = sb.rcScrollBar;
tp = tr;
if (PtInRect(ref tr, pt))
{
// top arrow
tp.Bottom = tr.Top + _iArrowCy;
if (PtInRect(ref tp, pt))
return SB_HITEST.topArrow;
// bottom arrow
tp.Top = tr.Bottom - _iArrowCy;
tp.Bottom = tr.Bottom;
if (PtInRect(ref tp, pt))
return SB_HITEST.bottomArrow;
// button
tp.Top = tr.Top + sb.xyThumbTop;
tp.Bottom = tr.Bottom + sb.xyThumbBottom;
if (PtInRect(ref tp, pt))
return SB_HITEST.button;
// track
return SB_HITEST.track;
}
}
return SB_HITEST.offControl;
}
private void scrollFader()
{
if (TransitionGraphic != null)
{
SB_HITEST hitTest;
SCROLLBARINFO sb = new SCROLLBARINFO();
sb.cbSize = Marshal.SizeOf(sb);
if (hasHorizontal())
{
hitTest = scrollbarHitTest(Orientation.Horizontal);
if ((hitTest == SB_HITEST.button) && (!leftKeyPressed()))
{
GetScrollBarInfo(_hControlWnd, OBJID_HSCROLL, ref sb);
// start the transition routines here
// size of mask - new Rectangle(sb.xyThumbTop, 2, sb.xyThumbBottom - sb.xyThumbTop, sb.rcScrollBar.Bottom)
}
}
if (hasVertical())
{
hitTest = scrollbarHitTest(Orientation.Vertical);
if ((hitTest == SB_HITEST.button) && (!leftKeyPressed()))
{
GetScrollBarInfo(_hControlWnd, OBJID_VSCROLL, ref sb);
// start the transition routines here
// size of mask - new Rectangle(sb.xyThumbTop, 2, sb.xyThumbBottom - sb.xyThumbTop, sb.rcScrollBar.Bottom)
}
}
}
}
public static extern bool GetScrollBarInfo(IntPtr hWnd, long idObject, ref SCROLLBARINFO barInfo);
private SCROLLBARINFO GetScrollBarInfo(IntPtr hWnd)
{
SCROLLBARINFO scrollbarinfo = new SCROLLBARINFO();
scrollbarinfo = new SCROLLBARINFO {
cbSize = Marshal.SizeOf(scrollbarinfo)
};
Win32.NativeMethods.SendMessage(hWnd, 0xeb, 0, ref scrollbarinfo);
return scrollbarinfo;
}
private void drawScrollBar()
{
SCROLLBARINFO sbi = new SCROLLBARINFO();
RECT tr = new RECT();
cStoreDc tempDc = new cStoreDc();
int offset = 0;
int width = 0;
int section = 0;
GetWindowRect(_hScrollBarWnd, ref tr);
OffsetRect(ref tr, -tr.Left, -tr.Top);
tempDc.Width = tr.Right;
tempDc.Height = tr.Bottom;
SB_HITEST hitTest = scrollbarHitTest();
sbi.cbSize = Marshal.SizeOf(sbi);
SendMessage(_hScrollBarWnd, SBM_GETSCROLLBARINFO, 0, ref sbi);
if (Direction == Orientation.Horizontal)
{
// draw the track
using (StretchImage si = new StretchImage(_cTrackDc.Hdc, tempDc.Hdc, new Rectangle(0, 0, _cTrackDc.Width, _cTrackDc.Height), new Rectangle(_iArrowCx, 0, tr.Right - (2 * _iArrowCx), tr.Bottom), 2, StretchModeEnum.STRETCH_HALFTONE)) { }
// draw the arrows
section = 7;
width = _cArrowDc.Width / section;
// left arrow
if (hitTest == SB_HITEST.leftArrow)
{
if (leftKeyPressed())
offset = 2;
else
offset = 1;
}
else
{
offset = 0;
}
using (StretchImage si = new StretchImage(_cArrowDc.Hdc, tempDc.Hdc, new Rectangle(offset * width, 0, width, _cArrowDc.Height), new Rectangle(0, 0, _iArrowCx, tr.Bottom), 2, StretchModeEnum.STRETCH_HALFTONE)) { }
// right arrow
if (hitTest == SB_HITEST.rightArrow)
{
if (leftKeyPressed())
offset = 5;
else
offset = 4;
}
else
{
offset = 3;
}
using (StretchImage si = new StretchImage(_cArrowDc.Hdc, tempDc.Hdc, new Rectangle(offset * width, 0, width, _cArrowDc.Height), new Rectangle(tr.Right - _iArrowCx, 0, _iArrowCx, tr.Bottom), 2, StretchModeEnum.STRETCH_HALFTONE)) { }
// draw the thumb
section = 3;
width = _cThumbDc.Width / section;
if (hitTest == SB_HITEST.button)
{
if (leftKeyPressed())
offset = 2;
else
offset = 1;
}
else
{
offset = 0;
}
Point pst = getScrollBarThumb();
using (StretchImage si = new StretchImage(_cThumbDc.Hdc, tempDc.Hdc, new Rectangle(offset * width, 0, width, _cThumbDc.Height), new Rectangle(pst.X, 0, pst.Y - pst.X, tr.Bottom), 2, StretchModeEnum.STRETCH_HALFTONE)) { }
}
else
{
// draw the track
using (StretchImage si = new StretchImage(_cTrackDc.Hdc, tempDc.Hdc, new Rectangle(0, 0, _cTrackDc.Width, _cTrackDc.Height), new Rectangle(0, _iArrowCy, tr.Right, tr.Bottom - (2 * _iArrowCy)), 2, StretchModeEnum.STRETCH_HALFTONE)) { }
section = 6;
width = _cArrowDc.Width / section;
// top arrow
if (hitTest == SB_HITEST.topArrow)
{
if (leftKeyPressed())
offset = 2;
else
offset = 1;
}
else
{
offset = 0;
}
using (StretchImage si = new StretchImage(_cArrowDc.Hdc, tempDc.Hdc, new Rectangle(offset * width, 0, width, _cArrowDc.Height), new Rectangle(0, 0, tr.Right, _iArrowCy), 2, StretchModeEnum.STRETCH_HALFTONE)) { }
// bottom arrow
if (hitTest == SB_HITEST.bottomArrow)
{
if (leftKeyPressed())
offset = 5;
else
offset = 4;
}
else
{
offset = 3;
}
using (StretchImage si = new StretchImage(_cArrowDc.Hdc, tempDc.Hdc, new Rectangle(offset * width, 0, width, _cArrowDc.Height), new Rectangle(0, tr.Bottom - _iArrowCy, tr.Right, _iArrowCy), 2, StretchModeEnum.STRETCH_HALFTONE)) { }
// draw the thumb
section = 3;
width = _cThumbDc.Width / section;
if (hitTest == SB_HITEST.button)
{
if (leftKeyPressed())
offset = 2;
else
offset = 1;
}
else
{
offset = 0;
}
Point pst = getScrollBarThumb();
using (StretchImage si = new StretchImage(_cThumbDc.Hdc, tempDc.Hdc, new Rectangle(offset * width, 0, width, _cThumbDc.Height), new Rectangle(0, pst.X, _iArrowCx, pst.Y - pst.X), 2, StretchModeEnum.STRETCH_HALFTONE)) { }
}
IntPtr hdc = GetDC(_hMaskWnd);
BitBlt(hdc, 0, 0, tr.Right, tr.Bottom, tempDc.Hdc, 0, 0, 0xCC0020);
ReleaseDC(_hMaskWnd, hdc);
tempDc.Dispose();
}
private SCROLLBARINFO GetBars()
{
SCROLLBARINFO si = new SCROLLBARINFO();
si.cbSize = Marshal.SizeOf(si);
int ret = GetScrollBarInfo(this.Handle, OBJID_VSCROLL, ref si);
if (ret == 0)
Marshal.ThrowExceptionForHR(Marshal.GetHRForLastWin32Error());
return si;
}
public static extern int GetScrollBarInfo(IntPtr hWnd, ObjId idObject, ref SCROLLBARINFO psbi);
private SCROLLBARINFO GetScrollBarInfo(IntPtr hWnd, uint objid)
{
SCROLLBARINFO scrollbarinfo = new SCROLLBARINFO();
scrollbarinfo = new SCROLLBARINFO {
cbSize = Marshal.SizeOf(scrollbarinfo)
};
Win32.NativeMethods.GetScrollBarInfo(hWnd, objid, ref scrollbarinfo);
return scrollbarinfo;
}
private static extern Int32 GetScrollBarInfo(IntPtr hWnd, UInt32 idObject, ref SCROLLBARINFO psbi);
/// <summary>
/// Sets formatting client rectangle of the control
/// </summary>
public void SetFormattingRectangle()
{
if (!base.IsHandleCreated)
{
return;
}
RECT rect = new RECT();
rect.left = 2;
rect.right = Width - 5;
rect.top = 2;
rect.bottom = Height - 3;
SCROLLBARINFO info = new SCROLLBARINFO();
bool val;
switch (ScrollBars)
{
case RichTextBoxScrollBars.None:
break;
case RichTextBoxScrollBars.Both:
info.cbSize = Marshal.SizeOf(info);
val = GetScrollBarInfo(Handle, SC_HSCROLL, ref info);
if (val && info.rcScrollBar.Height != 0)
{
rect.bottom -= SystemInformation.HorizontalScrollBarHeight;
}
val = GetScrollBarInfo(Handle, SC_VSCROLL, ref info);
if (val && info.rcScrollBar.Width != 0)
{
rect.right -= SystemInformation.VerticalScrollBarWidth;
}
break;
case RichTextBoxScrollBars.ForcedBoth:
rect.bottom -= SystemInformation.HorizontalScrollBarHeight;
rect.right -= SystemInformation.VerticalScrollBarWidth;
break;
case RichTextBoxScrollBars.ForcedHorizontal:
rect.bottom -= SystemInformation.HorizontalScrollBarHeight;
info.cbSize = Marshal.SizeOf(info);
val = GetScrollBarInfo(Handle, SC_VSCROLL, ref info);
if (val && info.rcScrollBar.Width != 0)
{
rect.right -= SystemInformation.VerticalScrollBarWidth;
}
break;
case RichTextBoxScrollBars.ForcedVertical:
rect.right -= SystemInformation.VerticalScrollBarWidth;
info.cbSize = Marshal.SizeOf(info);
val = GetScrollBarInfo(Handle, SC_HSCROLL, ref info);
if (val && info.rcScrollBar.Height != 0)
{
rect.bottom -= SystemInformation.HorizontalScrollBarHeight;
}
break;
case RichTextBoxScrollBars.Horizontal:
info.cbSize = Marshal.SizeOf(info);
val = GetScrollBarInfo(Handle, SC_HSCROLL, ref info);
if (val && info.rcScrollBar.Height != 0)
{
rect.bottom -= SystemInformation.HorizontalScrollBarHeight;
}
break;
case RichTextBoxScrollBars.Vertical:
info.cbSize = Marshal.SizeOf(info);
val = GetScrollBarInfo(Handle, SC_VSCROLL, ref info);
if (val && info.rcScrollBar.Width != 0)
{
rect.right -= SystemInformation.VerticalScrollBarWidth;
}
break;
}
int hr = SendMessage(Handle, EM_SETRECT,
0, ref rect);
if (hr != 0)
{
Marshal.ThrowExceptionForHR(hr);
}
}
private void CreateScrollBarMask()
{
Type t = typeof(ScrollBarSkin);
Module m = t.Module;
IntPtr hInstance = Marshal.GetHINSTANCE(m);
IntPtr hParent = GetParent(_hControlWnd);
RECT tr = new RECT();
Point pt = new Point();
SCROLLBARINFO sb = new SCROLLBARINFO();
sb.cbSize = Marshal.SizeOf(sb);
// vertical scrollbar
// get the size and position
GetScrollBarInfo(_hControlWnd, OBJID_VSCROLL, ref sb);
tr = sb.rcScrollBar;
pt.X = tr.Left;
pt.Y = tr.Top;
ScreenToClient(hParent, ref pt);
// create the window
_hVerticalMaskWnd = CreateWindowEx(WS_EX_TOPMOST | WS_EX_TOOLWINDOW,
"STATIC", "",
SS_OWNERDRAW | WS_CHILD | WS_CLIPSIBLINGS | WS_OVERLAPPED | WS_VISIBLE,
pt.X, pt.Y,
(tr.Right - tr.Left), (tr.Bottom - tr.Top),
hParent,
IntPtr.Zero, hInstance, IntPtr.Zero);
// set z-order
SetWindowPos(_hVerticalMaskWnd, HWND_TOP,
0, 0,
0, 0,
SWP_NOMOVE | SWP_NOSIZE | SWP_NOACTIVATE | SWP_NOOWNERZORDER);
// horizontal scrollbar
GetScrollBarInfo(_hControlWnd, OBJID_HSCROLL, ref sb);
tr = sb.rcScrollBar;
pt.X = tr.Left;
pt.Y = tr.Top;
ScreenToClient(hParent, ref pt);
_hHorizontalMaskWnd = CreateWindowEx(WS_EX_TOPMOST | WS_EX_TOOLWINDOW,
"STATIC", "",
SS_OWNERDRAW | WS_CHILD | WS_CLIPSIBLINGS | WS_OVERLAPPED | WS_VISIBLE,
pt.X, pt.Y,
(tr.Right - tr.Left), (tr.Bottom - tr.Top),
hParent,
IntPtr.Zero, hInstance, IntPtr.Zero);
SetWindowPos(_hHorizontalMaskWnd, HWND_TOP,
0, 0,
0, 0,
SWP_NOMOVE | SWP_NOSIZE | SWP_NOACTIVATE | SWP_NOOWNERZORDER);
// sizer
_hSizerMaskWnd = CreateWindowEx(WS_EX_TOPMOST | WS_EX_TOOLWINDOW,
"STATIC", "",
SS_OWNERDRAW | WS_CHILD | WS_CLIPSIBLINGS | WS_OVERLAPPED | WS_VISIBLE,
pt.X + (tr.Right - tr.Left), pt.Y,
_iArrowCx, _iArrowCy,
hParent,
IntPtr.Zero, hInstance, IntPtr.Zero);
SetWindowPos(_hSizerMaskWnd, HWND_TOP,
0, 0,
0, 0,
SWP_NOMOVE | SWP_NOSIZE | SWP_NOACTIVATE | SWP_NOOWNERZORDER);
ResizeMask();
}
private static extern int SendMessage(IntPtr hWnd, int Msg, int wParam, ref SCROLLBARINFO lParam);
private static extern int GetScrollBarInfo(IntPtr hWnd, uint idObject, ref SCROLLBARINFO psbi);
private void DrawScrollBar()
{
RECT tr = new RECT();
IntPtr hdc = IntPtr.Zero;
SCROLLBARINFO sb = new SCROLLBARINFO();
sb.cbSize = Marshal.SizeOf(sb);
if (HasHorizontal())
{
GetScrollBarInfo(_hControlWnd, OBJID_HSCROLL, ref sb);
tr = sb.rcScrollBar;
OffsetRect(ref tr, -tr.Left, -tr.Top);
hdc = GetDC(_hHorizontalMaskWnd);
Boolean isMouseOver = HitTest(Orientation.Horizontal);
Boolean isClick = IsLeftKeyPressed();
if (isMouseOver == true) _isFocus = true;
using (Graphics g = Graphics.FromHdc(hdc))
{
DrawHorizontalScrollBar(g, tr.Right, tr.Bottom, sb.xyThumbTop, sb.xyThumbBottom, _iArrowCx,
isMouseOver, isClick);
}
ReleaseDC(_hHorizontalMaskWnd, hdc);
}
if (HasSizer())
{
hdc = GetDC(_hSizerMaskWnd);
using (Graphics g = Graphics.FromHdc(hdc))
{
DrawSizer(g, _iArrowCx, _iArrowCy);
}
ReleaseDC(_hSizerMaskWnd, hdc);
}
if (HasVertical())
{
GetScrollBarInfo(_hControlWnd, OBJID_VSCROLL, ref sb);
tr = sb.rcScrollBar;
OffsetRect(ref tr, -tr.Left, -tr.Top);
Boolean isMouseOver = HitTest(Orientation.Vertical);
Boolean isClick = IsLeftKeyPressed();
if (isMouseOver == true) _isFocus = true;
hdc = GetDC(_hVerticalMaskWnd);
using (Graphics g = Graphics.FromHdc(hdc))
{
DrawVerticalScrollBar(g, tr.Right, tr.Bottom, sb.xyThumbTop, sb.xyThumbBottom, _iArrowCy,
isMouseOver, isClick);
}
ReleaseDC(_hVerticalMaskWnd, hdc);
}
}
private Boolean HitTest(Orientation orient)
{
Point pt = new Point();
RECT tr = new RECT();
RECT tp = new RECT();
SCROLLBARINFO sb = new SCROLLBARINFO();
sb.cbSize = Marshal.SizeOf(sb);
GetCursorPos(ref pt);
if (orient == Orientation.Horizontal)
{
GetScrollBarInfo(_hControlWnd, OBJID_HSCROLL, ref sb);
tr = sb.rcScrollBar;
tp = tr;
if (PtInRect(ref tr, pt))
{
return true;
}
}
else
{
GetScrollBarInfo(_hControlWnd, OBJID_VSCROLL, ref sb);
tr = sb.rcScrollBar;
tp = tr;
if (PtInRect(ref tr, pt))
{
return true;
}
}
return false;
}
public static int AutoCalcWidth(this ListView listView)
{
var sbi = new SCROLLBARINFO();
sbi.cbSize = Marshal.SizeOf(sbi);
if (GetScrollBarInfo(listView.Handle, (uint) ScrollObjMask.OBJID_HSCROLL, ref sbi) != 0)
{
const int minWidth = 100;
var borderWidth = SystemInformation.Border3DSize.Width;
var scrollBarWidth = SystemInformation.VerticalScrollBarWidth;
var scrollBars = GetVisibleScrollbars(listView);
if (scrollBars == ScrollBars.Both || scrollBars == ScrollBars.Horizontal)
scrollBarWidth = SystemInformation.VerticalScrollBarWidth;
else
{
scrollBarWidth = 0;
}
int state = sbi.rgstate[0];
var iWidth = 0;
// var iWidth = si.nMax - si.nMin + 2 * borderWidth + scrollBarWidth + 2;
return Math.Max(minWidth, iWidth);
}
var error = Marshal.GetLastWin32Error();
throw new Exception($"Pinvoked GetScrollBarInfo error:{error}");
}
private static extern bool GetScrollBarInfo(IntPtr hwnd, int idObject, ref SCROLLBARINFO psbi);
internal static extern bool GetScrollBarInfo(IntPtr hwnd, int idObject, ref SCROLLBARINFO psbi);
private static extern int GetScrollBarInfo(IntPtr hWnd, uint idObject, ref SCROLLBARINFO psbi);
public static extern bool GetScrollBarInfo(IntPtr hWnd, uint idObject, ref SCROLLBARINFO psbi);
private static extern int SendMessage(IntPtr hWnd, int Msg, int wParam, ref SCROLLBARINFO lParam);
private void createScrollBarMask()
{
Type t = typeof(cScrollBar);
Module m = t.Module;
IntPtr hInstance = Marshal.GetHINSTANCE(m);
IntPtr hParent = GetParent(_hControlWnd);
RECT tr = new RECT();
Point pt = new Point();
SCROLLBARINFO sb = new SCROLLBARINFO();
sb.cbSize = Marshal.SizeOf(sb);
// vertical scrollbar
// get the size and position
GetScrollBarInfo(_hControlWnd, OBJID_VSCROLL, ref sb);
tr = sb.rcScrollBar;
pt.X = tr.Left;
pt.Y = tr.Top;
ScreenToClient(hParent, ref pt);
// create the window
_hVerticalMaskWnd = CreateWindowEx(WS_EX_TOPMOST | WS_EX_TOOLWINDOW,
"STATIC", "",
SS_OWNERDRAW | WS_CHILD | WS_CLIPSIBLINGS | WS_OVERLAPPED | WS_VISIBLE,
pt.X, pt.Y,
(tr.Right - tr.Left), (tr.Bottom - tr.Top),
hParent,
IntPtr.Zero, hInstance, IntPtr.Zero);
// set z-order
SetWindowPos(_hVerticalMaskWnd, HWND_TOP,
0, 0,
0, 0,
SWP_NOMOVE | SWP_NOSIZE | SWP_NOACTIVATE | SWP_NOOWNERZORDER);
// horizontal scrollbar
GetScrollBarInfo(_hControlWnd, OBJID_HSCROLL, ref sb);
tr = sb.rcScrollBar;
pt.X = tr.Left;
pt.Y = tr.Top;
ScreenToClient(hParent, ref pt);
_hHorizontalMaskWnd = CreateWindowEx(WS_EX_TOPMOST | WS_EX_TOOLWINDOW,
"STATIC", "",
SS_OWNERDRAW | WS_CHILD | WS_CLIPSIBLINGS | WS_OVERLAPPED | WS_VISIBLE,
pt.X, pt.Y,
(tr.Right - tr.Left), (tr.Bottom - tr.Top),
hParent,
IntPtr.Zero, hInstance, IntPtr.Zero);
SetWindowPos(_hHorizontalMaskWnd, HWND_TOP,
0, 0,
0, 0,
SWP_NOMOVE | SWP_NOSIZE | SWP_NOACTIVATE | SWP_NOOWNERZORDER);
// sizer
_hSizerMaskWnd = CreateWindowEx(WS_EX_TOPMOST | WS_EX_TOOLWINDOW,
"STATIC", "",
SS_OWNERDRAW | WS_CHILD | WS_CLIPSIBLINGS | WS_OVERLAPPED | WS_VISIBLE,
pt.X + (tr.Right - tr.Left), pt.Y,
_iArrowCx, _iArrowCy,
hParent,
IntPtr.Zero, hInstance, IntPtr.Zero);
SetWindowPos(_hSizerMaskWnd, HWND_TOP,
0, 0,
0, 0,
SWP_NOMOVE | SWP_NOSIZE | SWP_NOACTIVATE | SWP_NOOWNERZORDER);
reSizeMask();
}
private RECT getScrollBarRect()
{
SCROLLBARINFO sbi = new SCROLLBARINFO();
sbi.cbSize = Marshal.SizeOf(sbi);
SendMessage(_hScrollBarWnd, SBM_GETSCROLLBARINFO, 0, ref sbi);
return sbi.rcScrollBar;
}
private void drawScrollBar()
{
RECT tr = new RECT();
Point pst = new Point();
cStoreDc tempDc = new cStoreDc();
IntPtr hdc = IntPtr.Zero;
int offset = 0;
int width = 0;
int section = 0;
SCROLLBARINFO sb = new SCROLLBARINFO();
sb.cbSize = Marshal.SizeOf(sb);
if (hasHorizontal())
{
GetScrollBarInfo(_hControlWnd, OBJID_HSCROLL, ref sb);
tr = sb.rcScrollBar;
OffsetRect(ref tr, -tr.Left, -tr.Top);
tempDc.Width = tr.Right;
tempDc.Height = tr.Bottom;
SB_HITEST hitTest = scrollbarHitTest(Orientation.Horizontal);
// draw the track
using (StretchImage si = new StretchImage(_cHorizontalTrackDc.Hdc, tempDc.Hdc, new Rectangle(0, 0, _cHorizontalTrackDc.Width, _cHorizontalTrackDc.Height), new Rectangle(_iArrowCx, 0, tr.Right - (2 * _iArrowCx), tr.Bottom), 2, StretchModeEnum.STRETCH_HALFTONE)) { }
// draw the arrows
section = 7;
width = _cHorizontalArrowDc.Width / section;
// left arrow
if (hitTest == SB_HITEST.leftArrow)
{
if (leftKeyPressed())
offset = 2;
else
offset = 1;
}
else
{
offset = 0;
}
using (StretchImage si = new StretchImage(_cHorizontalArrowDc.Hdc, tempDc.Hdc, new Rectangle(offset * width, 0, width, _cHorizontalArrowDc.Height), new Rectangle(0, 0, _iArrowCx, tr.Bottom), 2, StretchModeEnum.STRETCH_HALFTONE)) { }
// right arrow
if (hitTest == SB_HITEST.rightArrow)
{
if (leftKeyPressed())
offset = 5;
else
offset = 4;
}
else
{
offset = 3;
}
using (StretchImage si = new StretchImage(_cHorizontalArrowDc.Hdc, tempDc.Hdc, new Rectangle(offset * width, 0, width, _cHorizontalArrowDc.Height), new Rectangle(tr.Right - _iArrowCx, 0, _iArrowCx, tr.Bottom), 2, StretchModeEnum.STRETCH_HALFTONE)) { }
// draw the thumb
section = 3;
width = _cHorizontalThumbDc.Width / section;
if (hitTest == SB_HITEST.button)
{
if (leftKeyPressed())
offset = 2;
else
offset = 1;
}
else
{
offset = 0;
}
pst.X = sb.xyThumbTop;
pst.Y = sb.xyThumbBottom;
using (StretchImage si = new StretchImage(_cHorizontalThumbDc.Hdc, tempDc.Hdc, new Rectangle(offset * width, 0, width, _cHorizontalThumbDc.Height), new Rectangle(pst.X, 2, pst.Y - pst.X, tr.Bottom), 2, StretchModeEnum.STRETCH_HALFTONE)) { }
hdc = GetDC(_hHorizontalMaskWnd);
BitBlt(hdc, 0, 0, tr.Right, tr.Bottom, tempDc.Hdc, 0, 0, 0xCC0020);
ReleaseDC(_hHorizontalMaskWnd, hdc);
}
if (hasSizer())
{
tempDc.Width = _iArrowCx;
tempDc.Height = _iArrowCy;
offset = 6;
section = 7;
width = _cHorizontalArrowDc.Width / section;
using (StretchImage si = new StretchImage(_cHorizontalArrowDc.Hdc, tempDc.Hdc, new Rectangle(offset * width, 0, width, _cHorizontalArrowDc.Height), new Rectangle(0, 0, _iArrowCx, _iArrowCy), 0, StretchModeEnum.STRETCH_HALFTONE)) { }
hdc = GetDC(_hSizerMaskWnd);
BitBlt(hdc, 0, 0, _iArrowCx, _iArrowCy, tempDc.Hdc, 0, 0, 0xCC0020);
ReleaseDC(_hSizerMaskWnd, hdc);
}
if (hasVertical())
{
GetScrollBarInfo(_hControlWnd, OBJID_VSCROLL, ref sb);
tr = sb.rcScrollBar;
OffsetRect(ref tr, -tr.Left, -tr.Top);
tempDc.Width = tr.Right;
tempDc.Height = tr.Bottom;
SB_HITEST hitTest = scrollbarHitTest(Orientation.Vertical);
// draw the track
using (StretchImage si = new StretchImage(_cVerticalTrackDc.Hdc, tempDc.Hdc, new Rectangle(0, 0, _cVerticalTrackDc.Width, _cVerticalTrackDc.Height), new Rectangle(0, _iArrowCy, tr.Right, tr.Bottom - (2 * _iArrowCy)), 2, StretchModeEnum.STRETCH_HALFTONE)) { }
section = 6;
width = _cVerticalArrowDc.Width / section;
// top arrow
if (hitTest == SB_HITEST.topArrow)
{
if (leftKeyPressed())
offset = 2;
else
offset = 1;
}
else
{
offset = 0;
}
using (StretchImage si = new StretchImage(_cVerticalArrowDc.Hdc, tempDc.Hdc, new Rectangle(offset * width, 0, width, _cVerticalArrowDc.Height), new Rectangle(0, 0, tr.Right, _iArrowCy), 2, StretchModeEnum.STRETCH_HALFTONE)) { }
// bottom arrow
if (hitTest == SB_HITEST.bottomArrow)
{
if (leftKeyPressed())
offset = 5;
else
offset = 4;
}
else
{
offset = 3;
}
using (StretchImage si = new StretchImage(_cVerticalArrowDc.Hdc, tempDc.Hdc, new Rectangle(offset * width, 0, width, _cVerticalArrowDc.Height), new Rectangle(0, tr.Bottom - _iArrowCy, tr.Right, _iArrowCy), 2, StretchModeEnum.STRETCH_HALFTONE)) { }
// draw the thumb
section = 3;
width = _cVerticalThumbDc.Width / section;
if (hitTest == SB_HITEST.button)
{
if (leftKeyPressed())
offset = 2;
else
offset = 1;
}
else
{
offset = 0;
}
pst.X = sb.xyThumbTop;
pst.Y = sb.xyThumbBottom;
using (StretchImage si = new StretchImage(_cVerticalThumbDc.Hdc, tempDc.Hdc, new Rectangle(offset * width, 0, width, _cVerticalThumbDc.Height), new Rectangle(0, pst.X, _iArrowCx, pst.Y - pst.X), 2, StretchModeEnum.STRETCH_HALFTONE)) { }
hdc = GetDC(_hVerticalMaskWnd);
BitBlt(hdc, 0, 0, tr.Right, tr.Bottom, tempDc.Hdc, 0, 0, 0xCC0020);
ReleaseDC(_hVerticalMaskWnd, hdc);
}
tempDc.Dispose();
}
internal static extern int SendMessage(
IntPtr hWnd, int msg, int wParam, ref SCROLLBARINFO lParam);
public static extern bool GetScrollBarInfo(IntPtr hWnd, int idObject, ref SCROLLBARINFO psbi);
