/////////////////////////////////////////////////////////////////////////////
-// Name: scrolbar.cpp
+// Name: msw/scrolbar.cpp
// Purpose: wxScrollBar
// Author: Julian Smart
// Modified by:
// Created: 04/01/98
// RCS-ID: $Id$
-// Copyright: (c) Julian Smart and Markus Holzem
-// Licence: wxWindows license
+// Copyright: (c) Julian Smart
+// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
#ifdef __GNUG__
-#pragma implementation "scrolbar.h"
+ #pragma implementation "scrolbar.h"
#endif
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#ifdef __BORLANDC__
-#pragma hdrstop
+ #pragma hdrstop
#endif
+#if wxUSE_SCROLLBAR
+
#ifndef WX_PRECOMP
-#include "wx/defs.h"
-#include "wx/utils.h"
+ #include "wx/utils.h"
#endif
#include "wx/scrolbar.h"
return FALSE;
parent->AddChild(this);
SetName(name);
+#if wxUSE_VALIDATORS
SetValidator(validator);
-
+#endif // wxUSE_VALIDATORS
+
SetBackgroundColour(parent->GetBackgroundColour()) ;
SetForegroundColour(parent->GetForegroundColour()) ;
m_windowStyle = style;
height = 14;
}
+ DWORD wstyle = WS_VISIBLE | WS_CHILD;
+
+ if ( m_windowStyle & wxCLIP_SIBLINGS )
+ wstyle |= WS_CLIPSIBLINGS;
+
// Now create scrollbar
DWORD _direction = (style & wxHORIZONTAL) ?
SBS_HORZ: SBS_VERT;
HWND scroll_bar = CreateWindowEx(MakeExtendedStyle(style), wxT("SCROLLBAR"), wxT("scrollbar"),
- _direction | WS_CHILD | WS_VISIBLE,
+ _direction | wstyle,
0, 0, 0, 0, (HWND) parent->GetHWND(), (HMENU)m_windowId,
wxGetInstance(), NULL);
bool wxScrollBar::MSWOnScroll(int WXUNUSED(orientation), WXWORD wParam,
WXWORD pos, WXHWND control)
{
- int position = ::GetScrollPos((HWND) control, SB_CTL);
- int minPos, maxPos;
- ::GetScrollRange((HWND) control, SB_CTL, &minPos, &maxPos);
+ // current and max positions
+ int position,
+ maxPos, trackPos = pos;
+
+#ifdef __WIN32__
+ // when we're dragging the scrollbar we can't use pos parameter because it
+ // is limited to 16 bits
+ if ( wParam == SB_THUMBPOSITION || wParam == SB_THUMBTRACK )
+ {
+ SCROLLINFO scrollInfo;
+ wxZeroMemory(scrollInfo);
+ scrollInfo.cbSize = sizeof(SCROLLINFO);
+
+ // also get the range if we call GetScrollInfo() anyhow -- this is less
+ // expensive than call it once here and then call GetScrollRange()
+ // below
+ scrollInfo.fMask = SIF_RANGE | SIF_POS | SIF_TRACKPOS;
+
+ if ( !::GetScrollInfo(GetHwnd(), SB_CTL, &scrollInfo) )
+ {
+ wxLogLastError(_T("GetScrollInfo"));
+ }
+
+ trackPos = scrollInfo.nTrackPos;
+ position = scrollInfo.nPos;
+ maxPos = scrollInfo.nMax;
+ }
+ else
+#endif // Win32
+ {
+ position = ::GetScrollPos((HWND) control, SB_CTL);
+ int minPos;
+ ::GetScrollRange((HWND) control, SB_CTL, &minPos, &maxPos);
+ }
#if defined(__WIN95__)
// A page size greater than one has the effect of reducing the effective
int nScrollInc;
switch ( wParam )
{
- case SB_TOP:
+ case SB_BOTTOM:
nScrollInc = maxPos - position;
scrollEvent = wxEVT_SCROLL_TOP;
break;
- case SB_BOTTOM:
- nScrollInc = - position;
+ case SB_TOP:
+ nScrollInc = -position;
scrollEvent = wxEVT_SCROLL_BOTTOM;
break;
scrollEvent = wxEVT_SCROLL_PAGEDOWN;
break;
- case SB_THUMBTRACK:
case SB_THUMBPOSITION:
- nScrollInc = pos - position;
+ nScrollInc = trackPos - position;
+ scrollEvent = wxEVT_SCROLL_THUMBRELEASE;
+ break;
+
+ case SB_THUMBTRACK:
+ nScrollInc = trackPos - position;
scrollEvent = wxEVT_SCROLL_THUMBTRACK;
break;
+ case SB_ENDSCROLL:
+ nScrollInc = 0;
+ scrollEvent = wxEVT_SCROLL_ENDSCROLL;
+ break;
+
default:
nScrollInc = 0;
}
- if ( nScrollInc == 0 )
+ if ( nScrollInc )
{
- // no event to process, so don't process it
- return FALSE;
- }
+ position += nScrollInc;
- int new_pos = position + nScrollInc;
+ if ( position < 0 )
+ position = 0;
+ if ( position > maxPos )
+ position = maxPos;
- if (new_pos < 0)
- new_pos = 0;
- if (new_pos > maxPos)
- new_pos = maxPos;
+ SetThumbPosition(position);
+ }
+ else if ( scrollEvent != wxEVT_SCROLL_THUMBRELEASE &&
+ scrollEvent != wxEVT_SCROLL_ENDSCROLL )
+ {
+ // don't process the event if there is no displacement,
+ // unless this is a thumb release or end scroll event.
+ return FALSE;
+ }
- SetThumbPosition(new_pos);
wxScrollEvent event(scrollEvent, m_windowId);
- event.SetPosition(new_pos);
+ event.SetOrientation(IsVertical() ? wxVERTICAL : wxHORIZONTAL);
+ event.SetPosition(position);
event.SetEventObject( this );
return GetEventHandler()->ProcessEvent(event);
void wxScrollBar::SetThumbPosition(int viewStart)
{
#if defined(__WIN95__)
- SCROLLINFO info;
- info.cbSize = sizeof(SCROLLINFO);
- info.nPage = 0;
- info.nMin = 0;
- info.nPos = viewStart;
- info.fMask = SIF_POS ;
-
- ::SetScrollInfo((HWND) GetHWND(), SB_CTL, &info, TRUE);
+ SCROLLINFO info;
+ info.cbSize = sizeof(SCROLLINFO);
+ info.nPage = 0;
+ info.nMin = 0;
+ info.nPos = viewStart;
+ info.fMask = SIF_POS ;
+
+ ::SetScrollInfo((HWND) GetHWND(), SB_CTL, &info, TRUE);
#else
- ::SetScrollPos((HWND) GetHWND(), SB_CTL, viewStart, TRUE);
+ ::SetScrollPos((HWND) GetHWND(), SB_CTL, viewStart, TRUE);
#endif
}
If the scroll bar has a page size greater than one, the maximum scrolling position
is less than the maximum range value. You can use the following formula to calculate
the maximum scrolling position:
-
-MaxScrollPos = MaxRangeValue - (PageSize - 1)
+
+MaxScrollPos = MaxRangeValue - (PageSize - 1)
*/
#if WXWIN_COMPATIBILITY
}
#endif
-WXHBRUSH wxScrollBar::OnCtlColor(WXHDC pDC, WXHWND pWnd, WXUINT nCtlColor,
- WXUINT message, WXWPARAM wParam, WXLPARAM lParam)
+WXHBRUSH wxScrollBar::OnCtlColor(WXHDC WXUNUSED(pDC), WXHWND WXUNUSED(pWnd), WXUINT WXUNUSED(nCtlColor),
+ WXUINT WXUNUSED(message), WXWPARAM WXUNUSED(wParam), WXLPARAM WXUNUSED(lParam))
{
return 0;
}
}
}
#endif
+
+#endif // wxUSE_SCROLLBAR
projects / wxWidgets.git / blobdiff