mirror of
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343 lines
9.8 KiB
C++
343 lines
9.8 KiB
C++
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/////////////////////////////////////////////////////////////////////////////
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// Name: src/msw/scrolbar.cpp
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// Purpose: wxScrollBar
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// Author: Julian Smart
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// Modified by:
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// Created: 04/01/98
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// RCS-ID: $Id: scrolbar.cpp 39476 2006-05-30 13:43:18Z ABX $
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// Copyright: (c) Julian Smart
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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// For compilers that support precompilation, includes "wx.h".
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#include "wx/wxprec.h"
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#ifdef __BORLANDC__
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#pragma hdrstop
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#endif
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#if wxUSE_SCROLLBAR
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#include "wx/scrolbar.h"
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#ifndef WX_PRECOMP
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#include "wx/utils.h"
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#include "wx/settings.h"
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#endif
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#include "wx/msw/private.h"
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#if wxUSE_EXTENDED_RTTI
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WX_DEFINE_FLAGS( wxScrollBarStyle )
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wxBEGIN_FLAGS( wxScrollBarStyle )
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// new style border flags, we put them first to
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// use them for streaming out
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wxFLAGS_MEMBER(wxBORDER_SIMPLE)
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wxFLAGS_MEMBER(wxBORDER_SUNKEN)
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wxFLAGS_MEMBER(wxBORDER_DOUBLE)
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wxFLAGS_MEMBER(wxBORDER_RAISED)
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wxFLAGS_MEMBER(wxBORDER_STATIC)
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wxFLAGS_MEMBER(wxBORDER_NONE)
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// old style border flags
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wxFLAGS_MEMBER(wxSIMPLE_BORDER)
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wxFLAGS_MEMBER(wxSUNKEN_BORDER)
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wxFLAGS_MEMBER(wxDOUBLE_BORDER)
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wxFLAGS_MEMBER(wxRAISED_BORDER)
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wxFLAGS_MEMBER(wxSTATIC_BORDER)
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wxFLAGS_MEMBER(wxBORDER)
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// standard window styles
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wxFLAGS_MEMBER(wxTAB_TRAVERSAL)
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wxFLAGS_MEMBER(wxCLIP_CHILDREN)
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wxFLAGS_MEMBER(wxTRANSPARENT_WINDOW)
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wxFLAGS_MEMBER(wxWANTS_CHARS)
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wxFLAGS_MEMBER(wxFULL_REPAINT_ON_RESIZE)
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wxFLAGS_MEMBER(wxALWAYS_SHOW_SB )
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wxFLAGS_MEMBER(wxVSCROLL)
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wxFLAGS_MEMBER(wxHSCROLL)
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wxFLAGS_MEMBER(wxSB_HORIZONTAL)
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wxFLAGS_MEMBER(wxSB_VERTICAL)
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wxEND_FLAGS( wxScrollBarStyle )
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IMPLEMENT_DYNAMIC_CLASS_XTI(wxScrollBar, wxControl,"wx/scrolbar.h")
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wxBEGIN_PROPERTIES_TABLE(wxScrollBar)
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wxEVENT_RANGE_PROPERTY( Scroll , wxEVT_SCROLL_TOP , wxEVT_SCROLL_CHANGED , wxScrollEvent )
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wxPROPERTY( ThumbPosition , int , SetThumbPosition, GetThumbPosition, 0 , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
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wxPROPERTY( Range , int , SetRange, GetRange, 0 , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
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wxPROPERTY( ThumbSize , int , SetThumbSize, GetThumbSize, 0 , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
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wxPROPERTY( PageSize , int , SetPageSize, GetPageSize, 0 , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
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wxPROPERTY_FLAGS( WindowStyle , wxScrollBarStyle , long , SetWindowStyleFlag , GetWindowStyleFlag , EMPTY_MACROVALUE , 0 /*flags*/ , wxT("Helpstring") , wxT("group")) // style
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wxEND_PROPERTIES_TABLE()
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wxBEGIN_HANDLERS_TABLE(wxScrollBar)
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wxEND_HANDLERS_TABLE()
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wxCONSTRUCTOR_5( wxScrollBar , wxWindow* , Parent , wxWindowID , Id , wxPoint , Position , wxSize , Size , long , WindowStyle )
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#else
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IMPLEMENT_DYNAMIC_CLASS(wxScrollBar, wxControl)
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#endif
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// Scrollbar
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bool wxScrollBar::Create(wxWindow *parent, wxWindowID id,
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const wxPoint& pos,
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const wxSize& size, long style,
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const wxValidator& validator,
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const wxString& name)
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{
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if ( !CreateControl(parent, id, pos, size, style, validator, name) )
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return false;
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if (!MSWCreateControl(wxT("ScrollBar"), wxEmptyString, pos, size))
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return false;
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SetScrollbar(0, 1, 2, 1, false);
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return true;
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}
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wxScrollBar::~wxScrollBar(void)
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{
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}
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bool wxScrollBar::MSWOnScroll(int WXUNUSED(orientation), WXWORD wParam,
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WXWORD pos, WXHWND WXUNUSED(control))
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{
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// current and max positions
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int position,
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maxPos, trackPos = pos;
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wxUnusedVar(trackPos);
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// when we're dragging the scrollbar we can't use pos parameter because it
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// is limited to 16 bits
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// JACS: now always using GetScrollInfo, since there's no reason
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// not to
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// if ( wParam == SB_THUMBPOSITION || wParam == SB_THUMBTRACK )
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{
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SCROLLINFO scrollInfo;
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wxZeroMemory(scrollInfo);
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scrollInfo.cbSize = sizeof(SCROLLINFO);
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// also get the range if we call GetScrollInfo() anyhow -- this is less
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// expensive than call it once here and then call GetScrollRange()
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// below
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scrollInfo.fMask = SIF_RANGE | SIF_POS | SIF_TRACKPOS;
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if ( !::GetScrollInfo(GetHwnd(), SB_CTL, &scrollInfo) )
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{
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wxLogLastError(_T("GetScrollInfo"));
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}
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trackPos = scrollInfo.nTrackPos;
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position = scrollInfo.nPos;
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maxPos = scrollInfo.nMax;
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}
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#if 0
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else
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{
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position = ::GetScrollPos((HWND) control, SB_CTL);
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int minPos;
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::GetScrollRange((HWND) control, SB_CTL, &minPos, &maxPos);
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}
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#endif
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// A page size greater than one has the effect of reducing the effective
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// range, therefore the range has already been boosted artificially - so
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// reduce it again.
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if ( m_pageSize > 1 )
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maxPos -= (m_pageSize - 1);
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wxEventType scrollEvent = wxEVT_NULL;
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int nScrollInc;
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switch ( wParam )
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{
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case SB_TOP:
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nScrollInc = maxPos - position;
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scrollEvent = wxEVT_SCROLL_TOP;
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break;
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case SB_BOTTOM:
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nScrollInc = -position;
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scrollEvent = wxEVT_SCROLL_BOTTOM;
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break;
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case SB_LINEUP:
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nScrollInc = -1;
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scrollEvent = wxEVT_SCROLL_LINEUP;
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break;
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case SB_LINEDOWN:
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nScrollInc = 1;
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scrollEvent = wxEVT_SCROLL_LINEDOWN;
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break;
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case SB_PAGEUP:
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nScrollInc = -GetPageSize();
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scrollEvent = wxEVT_SCROLL_PAGEUP;
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break;
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case SB_PAGEDOWN:
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nScrollInc = GetPageSize();
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scrollEvent = wxEVT_SCROLL_PAGEDOWN;
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break;
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case SB_THUMBPOSITION:
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nScrollInc = trackPos - position;
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scrollEvent = wxEVT_SCROLL_THUMBRELEASE;
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break;
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case SB_THUMBTRACK:
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nScrollInc = trackPos - position;
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scrollEvent = wxEVT_SCROLL_THUMBTRACK;
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break;
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case SB_ENDSCROLL:
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nScrollInc = 0;
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scrollEvent = wxEVT_SCROLL_CHANGED;
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break;
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default:
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nScrollInc = 0;
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}
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if ( nScrollInc )
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{
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position += nScrollInc;
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if ( position < 0 )
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position = 0;
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if ( position > maxPos )
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position = maxPos;
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SetThumbPosition(position);
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}
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else if ( scrollEvent != wxEVT_SCROLL_THUMBRELEASE &&
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scrollEvent != wxEVT_SCROLL_CHANGED )
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{
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// don't process the event if there is no displacement,
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// unless this is a thumb release or end scroll event.
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return false;
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}
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wxScrollEvent event(scrollEvent, m_windowId);
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event.SetOrientation(IsVertical() ? wxVERTICAL : wxHORIZONTAL);
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event.SetPosition(position);
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event.SetEventObject( this );
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return GetEventHandler()->ProcessEvent(event);
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}
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void wxScrollBar::SetThumbPosition(int viewStart)
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{
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SCROLLINFO info;
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info.cbSize = sizeof(SCROLLINFO);
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info.nPage = 0;
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info.nMin = 0;
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info.nPos = viewStart;
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info.fMask = SIF_POS ;
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::SetScrollInfo((HWND) GetHWND(), SB_CTL, &info, TRUE);
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}
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int wxScrollBar::GetThumbPosition(void) const
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{
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SCROLLINFO scrollInfo;
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wxZeroMemory(scrollInfo);
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scrollInfo.cbSize = sizeof(SCROLLINFO);
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scrollInfo.fMask = SIF_POS;
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if ( !::GetScrollInfo(GetHwnd(), SB_CTL, &scrollInfo) )
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{
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wxLogLastError(_T("GetScrollInfo"));
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}
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return scrollInfo.nPos;
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// return ::GetScrollPos((HWND)m_hWnd, SB_CTL);
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}
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void wxScrollBar::SetScrollbar(int position, int thumbSize, int range, int pageSize,
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bool refresh)
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{
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m_viewSize = pageSize;
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m_pageSize = thumbSize;
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m_objectSize = range;
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// The range (number of scroll steps) is the
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// object length minus the page size.
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int range1 = wxMax((m_objectSize - m_pageSize), 0) ;
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// Try to adjust the range to cope with page size > 1
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// (see comment for SetPageLength)
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if ( m_pageSize > 1 )
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{
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range1 += (m_pageSize - 1);
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}
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SCROLLINFO info;
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info.cbSize = sizeof(SCROLLINFO);
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info.nPage = m_pageSize;
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info.nMin = 0;
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info.nMax = range1;
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info.nPos = position;
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info.fMask = SIF_PAGE | SIF_RANGE | SIF_POS;
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::SetScrollInfo((HWND) GetHWND(), SB_CTL, &info, refresh);
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}
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void wxScrollBar::Command(wxCommandEvent& event)
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{
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SetThumbPosition(event.GetInt());
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ProcessCommand(event);
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}
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wxSize wxScrollBar::DoGetBestSize() const
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{
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int w = 100;
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int h = 100;
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if ( IsVertical() )
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{
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w = wxSystemSettings::GetMetric(wxSYS_VSCROLL_X);
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}
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else
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{
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h = wxSystemSettings::GetMetric(wxSYS_HSCROLL_Y);
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}
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wxSize best(w, h);
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CacheBestSize(best);
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return best;
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}
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WXDWORD wxScrollBar::MSWGetStyle(long style, WXDWORD *exstyle) const
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{
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// we never have an external border
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WXDWORD msStyle = wxControl::MSWGetStyle
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(
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(style & ~wxBORDER_MASK) | wxBORDER_NONE, exstyle
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);
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// SBS_HORZ is 0 anyhow, but do mention it explicitly for clarity
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msStyle |= style & wxSB_HORIZONTAL ? SBS_HORZ : SBS_VERT;
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return msStyle;
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}
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WXHBRUSH wxScrollBar::MSWControlColor(WXHDC pDC, WXHWND hWnd)
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{
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// unless we have an explicitly set bg colour, use default (gradient under
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// XP) brush instead of GetBackgroundColour() one as the base class would
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//
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// note that fg colour isn't used for a scrollbar
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return UseBgCol() ? wxControl::MSWControlColor(pDC, hWnd) : NULL;
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}
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#endif // wxUSE_SCROLLBAR
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