X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/feda30118705b9bb6b2fc966655048c39a703563..43c42c18d36c703a88b1b7b697bac27fe5608eca:/src/msw/scrolbar.cpp

diff --git a/src/msw/scrolbar.cpp b/src/msw/scrolbar.cpp
index ab6f9668b5..33b0a0c581 100644
--- a/src/msw/scrolbar.cpp
+++ b/src/msw/scrolbar.cpp
@@ -1,41 +1,31 @@
 /////////////////////////////////////////////////////////////////////////////
-// Name:        scrolbar.cpp
+// Name:        src/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"
-#endif
-
 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 
 #ifdef __BORLANDC__
-#pragma hdrstop
+    #pragma hdrstop
 #endif
 
-#ifndef WX_PRECOMP
-#include "wx/defs.h"
-#include "wx/utils.h"
-#endif
+#if wxUSE_SCROLLBAR
 
 #include "wx/scrolbar.h"
-#include "wx/msw/private.h"
-
-IMPLEMENT_DYNAMIC_CLASS(wxScrollBar, wxControl)
 
-BEGIN_EVENT_TABLE(wxScrollBar, wxControl)
-#if WXWIN_COMPATIBILITY
-  EVT_SCROLL(wxScrollBar::OnScroll)
+#ifndef WX_PRECOMP
+    #include "wx/utils.h"
+    #include "wx/settings.h"
 #endif
-END_EVENT_TABLE()
 
+#include "wx/msw/private.h"
 
 // Scrollbar
 bool wxScrollBar::Create(wxWindow *parent, wxWindowID id,
@@ -44,69 +34,15 @@ bool wxScrollBar::Create(wxWindow *parent, wxWindowID id,
            const wxValidator& validator,
            const wxString& name)
 {
-    if (!parent)
-        return FALSE;
-    parent->AddChild(this);
-    SetName(name);
-#if wxUSE_VALIDATORS
-    SetValidator(validator);
-#endif // wxUSE_VALIDATORS
-    
-    SetBackgroundColour(parent->GetBackgroundColour()) ;
-    SetForegroundColour(parent->GetForegroundColour()) ;
-    m_windowStyle = style;
-
-  if ( id == -1 )
-      m_windowId = (int)NewControlId();
-  else
-    m_windowId = id;
-
-  int x = pos.x;
-  int y = pos.y;
-  int width = size.x;
-  int height = size.y;
-
-    if (width == -1)
-    {
-      if (style & wxHORIZONTAL)
-        width = 140;
-      else
-        width = 14;
-    }
-    if (height == -1)
-    {
-      if (style & wxVERTICAL)
-        height = 140;
-      else
-        height = 14;
-    }
-
-    // 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,
-                         0, 0, 0, 0, (HWND) parent->GetHWND(), (HMENU)m_windowId,
-                         wxGetInstance(), NULL);
-
-    m_pageSize = 1;
-    m_viewSize = 1;
-    m_objectSize = 1;
-
-    ::SetScrollRange(scroll_bar, SB_CTL, 0, 1, FALSE);
-    ::SetScrollPos(scroll_bar, SB_CTL, 0, FALSE);
-    ShowWindow(scroll_bar, SW_SHOW);
+    if ( !CreateControl(parent, id, pos, size, style, validator, name) )
+        return false;
 
-    SetFont(parent->GetFont());
+    if (!MSWCreateControl(wxT("ScrollBar"), wxEmptyString, pos, size))
+        return false;
 
-    m_hWnd = (WXHWND)scroll_bar;
+    SetScrollbar(0, 1, 2, 1, false);
 
-    // Subclass again for purposes of dialog editing mode
-    SubclassWin((WXHWND) scroll_bar);
-
-    SetSize(x, y, width, height);
-
-    return TRUE;
+    return true;
 }
 
 wxScrollBar::~wxScrollBar(void)
@@ -114,242 +50,198 @@ wxScrollBar::~wxScrollBar(void)
 }
 
 bool wxScrollBar::MSWOnScroll(int WXUNUSED(orientation), WXWORD wParam,
-                              WXWORD pos, WXHWND control)
+                              WXWORD WXUNUSED(pos), WXHWND WXUNUSED(control))
 {
-    int position = ::GetScrollPos((HWND) control, SB_CTL);
-    int minPos, maxPos;
-    ::GetScrollRange((HWND) control, SB_CTL, &minPos, &maxPos);
+    // don't use pos parameter because it is limited to 16 bits, get the full
+    // 32 bit position from the control itself instead
+    WinStruct<SCROLLINFO> scrollInfo;
+    scrollInfo.fMask = SIF_RANGE | SIF_POS | SIF_TRACKPOS;
+
+    if ( !::GetScrollInfo(GetHwnd(), SB_CTL, &scrollInfo) )
+    {
+        wxLogLastError(wxT("GetScrollInfo"));
+        return false;
+    }
+
+    int maxPos = scrollInfo.nMax;
 
-#if defined(__WIN95__)
     // A page size greater than one has the effect of reducing the effective
     // range, therefore the range has already been boosted artificially - so
     // reduce it again.
     if ( m_pageSize > 1 )
         maxPos -= (m_pageSize - 1);
-#endif // __WIN95__
 
+    int position = scrollInfo.nPos;
     wxEventType scrollEvent = wxEVT_NULL;
-
-    int nScrollInc;
-    bool isScrolling = TRUE;
     switch ( wParam )
     {
         case SB_TOP:
-            nScrollInc = maxPos - position;
+            position = 0;
             scrollEvent = wxEVT_SCROLL_TOP;
             break;
 
         case SB_BOTTOM:
-            nScrollInc = - position;
+            position = maxPos;
             scrollEvent = wxEVT_SCROLL_BOTTOM;
             break;
 
         case SB_LINEUP:
-            nScrollInc = -1;
+            position--;
             scrollEvent = wxEVT_SCROLL_LINEUP;
             break;
 
         case SB_LINEDOWN:
-            nScrollInc = 1;
+            position++;
             scrollEvent = wxEVT_SCROLL_LINEDOWN;
             break;
 
         case SB_PAGEUP:
-            nScrollInc = -GetPageSize();
+            position -= GetPageSize();
             scrollEvent = wxEVT_SCROLL_PAGEUP;
             break;
 
         case SB_PAGEDOWN:
-            nScrollInc = GetPageSize();
+            position += GetPageSize();
             scrollEvent = wxEVT_SCROLL_PAGEDOWN;
             break;
 
         case SB_THUMBPOSITION:
-            isScrolling = FALSE;
-            /* fall-through */
-
         case SB_THUMBTRACK:
-            nScrollInc = pos - position;
-            scrollEvent = wxEVT_SCROLL_THUMBTRACK;
+            position = scrollInfo.nTrackPos;
+            scrollEvent = wParam == SB_THUMBPOSITION ? wxEVT_SCROLL_THUMBRELEASE
+                                                     : wxEVT_SCROLL_THUMBTRACK;
             break;
 
-        default:
-            nScrollInc = 0;
+        case SB_ENDSCROLL:
+            scrollEvent = wxEVT_SCROLL_CHANGED;
+            break;
     }
 
-    if (( nScrollInc == 0 ) && isScrolling )
+    if ( position != scrollInfo.nPos )
     {
-        // no event to process, so don't process it
-        // GRG: always process SB_THUMBPOSITION !
-        return FALSE;
-    }
+        if ( position < 0 )
+            position = 0;
+        if ( position > maxPos )
+            position = maxPos;
 
-    int new_pos = position + nScrollInc;
-
-    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_CHANGED )
+    {
+        // 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 );
-    event.SetScrolling(isScrolling);
 
-    return GetEventHandler()->ProcessEvent(event);
+    return HandleWindowEvent(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);
-#else
-  ::SetScrollPos((HWND) GetHWND(), SB_CTL, viewStart, TRUE);
-#endif
+    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);
 }
 
 int wxScrollBar::GetThumbPosition(void) const
 {
-    return ::GetScrollPos((HWND)m_hWnd, SB_CTL);
+    WinStruct<SCROLLINFO> scrollInfo;
+    scrollInfo.fMask = SIF_POS;
+
+    if ( !::GetScrollInfo(GetHwnd(), SB_CTL, &scrollInfo) )
+    {
+        wxLogLastError(wxT("GetScrollInfo"));
+    }
+    return scrollInfo.nPos;
 }
 
 void wxScrollBar::SetScrollbar(int position, int thumbSize, int range, int pageSize,
     bool refresh)
 {
-  m_viewSize = pageSize;
-  m_pageSize = thumbSize;
-  m_objectSize = range;
-
-  // The range (number of scroll steps) is the
-  // object length minus the page size.
-  int range1 = wxMax((m_objectSize - m_pageSize), 0) ;
-
-#if defined(__WIN95__)
-  // Try to adjust the range to cope with page size > 1
-  // (see comment for SetPageLength)
-  if ( m_pageSize > 1 )
-  {
-    range1 += (m_pageSize - 1);
-  }
-
-  SCROLLINFO info;
-  info.cbSize = sizeof(SCROLLINFO);
-  info.nPage = m_pageSize;
-  info.nMin = 0;
-  info.nMax = range1;
-  info.nPos = position;
-
-  info.fMask = SIF_PAGE | SIF_RANGE | SIF_POS;
-
-  ::SetScrollInfo((HWND) GetHWND(), SB_CTL, &info, refresh);
-#else
-  ::SetScrollPos((HWND)m_hWnd, SB_CTL, position, TRUE);
-  ::SetScrollRange((HWND)m_hWnd, SB_CTL, 0, range1, TRUE);
-#endif
-}
+    m_viewSize = pageSize;
+    m_pageSize = thumbSize;
+    m_objectSize = range;
 
+    // The range (number of scroll steps) is the
+    // object length minus the page size.
+    int range1 = wxMax((m_objectSize - m_pageSize), 0) ;
 
-/* From the WIN32 documentation:
-In version 4.0 or later, the maximum value that a scroll bar can report
-(that is, the maximum scrolling position) depends on the page size.
-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) 
-*/
+    // Try to adjust the range to cope with page size > 1
+    // (see comment for SetPageLength)
+    if ( m_pageSize > 1 )
+    {
+        range1 += (m_pageSize - 1);
+    }
 
-#if WXWIN_COMPATIBILITY
-void wxScrollBar::SetPageSize(int pageLength)
-{
-  m_pageSize = pageLength;
+    SCROLLINFO info;
+    info.cbSize = sizeof(SCROLLINFO);
+    info.nPage = m_pageSize;
+    info.nMin = 0;
+    info.nMax = range1;
+    info.nPos = position;
 
-#if defined(__WIN95__)
-  SCROLLINFO info;
-  info.cbSize = sizeof(SCROLLINFO);
-  info.nPage = pageLength;
-  info.fMask = SIF_PAGE ;
+    info.fMask = SIF_PAGE | SIF_RANGE | SIF_POS;
 
-  ::SetScrollInfo((HWND) GetHWND(), SB_CTL, &info, TRUE);
-#endif
+    ::SetScrollInfo((HWND) GetHWND(), SB_CTL, &info, refresh);
 }
 
-void wxScrollBar::SetObjectLength(int objectLength)
+void wxScrollBar::Command(wxCommandEvent& event)
 {
-  m_objectSize = objectLength;
-
-  // The range (number of scroll steps) is the
-  // object length minus the view size.
-  int range = wxMax((objectLength - m_viewSize), 0) ;
-
-#if defined(__WIN95__)
-  // Try to adjust the range to cope with page size > 1
-  // (see comment for SetPageLength)
-  if ( m_pageSize > 1 )
-  {
-    range += (m_pageSize - 1);
-  }
-
-  SCROLLINFO info;
-  info.cbSize = sizeof(SCROLLINFO);
-  info.nPage = 0;
-  info.nMin = 0;
-  info.nMax = range;
-  info.nPos = 0;
-  info.fMask = SIF_RANGE ;
-
-  ::SetScrollInfo((HWND) GetHWND(), SB_CTL, &info, TRUE);
-#else
-  ::SetScrollRange((HWND)m_hWnd, SB_CTL, 0, range, TRUE);
-#endif
+    SetThumbPosition(event.GetInt());
+    ProcessCommand(event);
 }
 
-void wxScrollBar::SetViewLength(int viewLength)
+wxSize wxScrollBar::DoGetBestSize() const
 {
-    m_viewSize = viewLength;
-}
+    int w = 100;
+    int h = 100;
 
-void wxScrollBar::GetValues(int *viewStart, int *viewLength, int *objectLength,
-           int *pageLength) const
-{
-    *viewStart = ::GetScrollPos((HWND)m_hWnd, SB_CTL);
-    *viewLength = m_viewSize;
-    *objectLength = m_objectSize;
-    *pageLength = m_pageSize;
-}
-#endif
+    if ( IsVertical() )
+    {
+        w = wxSystemSettings::GetMetric(wxSYS_VSCROLL_X);
+    }
+    else
+    {
+        h = wxSystemSettings::GetMetric(wxSYS_HSCROLL_Y);
+    }
 
-WXHBRUSH wxScrollBar::OnCtlColor(WXHDC pDC, WXHWND pWnd, WXUINT nCtlColor,
-            WXUINT message, WXWPARAM wParam, WXLPARAM lParam)
-{
-  return 0;
+    wxSize best(w, h);
+    CacheBestSize(best);
+    return best;
 }
 
-void wxScrollBar::Command(wxCommandEvent& event)
+WXDWORD wxScrollBar::MSWGetStyle(long style, WXDWORD *exstyle) const
 {
-    SetThumbPosition(event.m_commandInt);
-    ProcessCommand(event);
+    // we never have an external border
+    WXDWORD msStyle = wxControl::MSWGetStyle
+                      (
+                        (style & ~wxBORDER_MASK) | wxBORDER_NONE, exstyle
+                      );
+
+    // SBS_HORZ is 0 anyhow, but do mention it explicitly for clarity
+    msStyle |= style & wxSB_HORIZONTAL ? SBS_HORZ : SBS_VERT;
+
+    return msStyle;
 }
 
-#if WXWIN_COMPATIBILITY
-// Backward compatibility
-void wxScrollBar::OnScroll(wxScrollEvent& event)
+WXHBRUSH wxScrollBar::MSWControlColor(WXHDC pDC, WXHWND hWnd)
 {
-    wxEventType oldEvent = event.GetEventType();
-    event.SetEventType( wxEVT_COMMAND_SCROLLBAR_UPDATED );
-    if ( !GetEventHandler()->ProcessEvent(event) )
-    {
-        event.SetEventType( oldEvent );
-        if (!GetParent()->GetEventHandler()->ProcessEvent(event))
-            event.Skip();
-    }
+    // unless we have an explicitly set bg colour, use default (gradient under
+    // XP) brush instead of GetBackgroundColour() one as the base class would
+    //
+    // note that fg colour isn't used for a scrollbar
+    return UseBgCol() ? wxControl::MSWControlColor(pDC, hWnd) : NULL;
 }
-#endif
+
+#endif // wxUSE_SCROLLBAR