11b6a93b1e
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@5279 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
350 lines
8.4 KiB
C++
350 lines
8.4 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// Name: 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: $Id$
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// Copyright: (c) Julian Smart and Markus Holzem
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// Licence: wxWindows license
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/////////////////////////////////////////////////////////////////////////////
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#ifdef __GNUG__
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#pragma implementation "scrolbar.h"
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#endif
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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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#ifndef WX_PRECOMP
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#include "wx/defs.h"
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#include "wx/utils.h"
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#endif
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#include "wx/scrolbar.h"
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#include "wx/msw/private.h"
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IMPLEMENT_DYNAMIC_CLASS(wxScrollBar, wxControl)
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BEGIN_EVENT_TABLE(wxScrollBar, wxControl)
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#if WXWIN_COMPATIBILITY
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EVT_SCROLL(wxScrollBar::OnScroll)
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#endif
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END_EVENT_TABLE()
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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 (!parent)
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return FALSE;
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parent->AddChild(this);
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SetName(name);
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#if wxUSE_VALIDATORS
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SetValidator(validator);
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#endif // wxUSE_VALIDATORS
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SetBackgroundColour(parent->GetBackgroundColour()) ;
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SetForegroundColour(parent->GetForegroundColour()) ;
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m_windowStyle = style;
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if ( id == -1 )
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m_windowId = (int)NewControlId();
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else
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m_windowId = id;
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int x = pos.x;
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int y = pos.y;
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int width = size.x;
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int height = size.y;
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if (width == -1)
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{
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if (style & wxHORIZONTAL)
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width = 140;
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else
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width = 14;
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}
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if (height == -1)
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{
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if (style & wxVERTICAL)
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height = 140;
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else
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height = 14;
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}
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// Now create scrollbar
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DWORD _direction = (style & wxHORIZONTAL) ?
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SBS_HORZ: SBS_VERT;
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HWND scroll_bar = CreateWindowEx(MakeExtendedStyle(style), wxT("SCROLLBAR"), wxT("scrollbar"),
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_direction | WS_CHILD | WS_VISIBLE,
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0, 0, 0, 0, (HWND) parent->GetHWND(), (HMENU)m_windowId,
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wxGetInstance(), NULL);
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m_pageSize = 1;
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m_viewSize = 1;
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m_objectSize = 1;
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::SetScrollRange(scroll_bar, SB_CTL, 0, 1, FALSE);
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::SetScrollPos(scroll_bar, SB_CTL, 0, FALSE);
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ShowWindow(scroll_bar, SW_SHOW);
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SetFont(parent->GetFont());
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m_hWnd = (WXHWND)scroll_bar;
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// Subclass again for purposes of dialog editing mode
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SubclassWin((WXHWND) scroll_bar);
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SetSize(x, y, width, height);
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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 control)
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{
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int position = ::GetScrollPos((HWND) control, SB_CTL);
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int minPos, maxPos;
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::GetScrollRange((HWND) control, SB_CTL, &minPos, &maxPos);
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#if defined(__WIN95__)
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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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#endif // __WIN95__
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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_THUMBTRACK:
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case SB_THUMBPOSITION:
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nScrollInc = pos - position;
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scrollEvent = wxEVT_SCROLL_THUMBTRACK;
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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 == 0 )
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{
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// no event to process, so don't process it
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return FALSE;
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}
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int new_pos = position + nScrollInc;
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if (new_pos < 0)
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new_pos = 0;
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if (new_pos > maxPos)
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new_pos = maxPos;
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SetThumbPosition(new_pos);
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wxScrollEvent event(scrollEvent, m_windowId);
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event.SetPosition(new_pos);
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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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#if defined(__WIN95__)
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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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#else
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::SetScrollPos((HWND) GetHWND(), SB_CTL, viewStart, TRUE);
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#endif
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}
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int wxScrollBar::GetThumbPosition(void) const
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{
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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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#if defined(__WIN95__)
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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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#else
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::SetScrollPos((HWND)m_hWnd, SB_CTL, position, TRUE);
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::SetScrollRange((HWND)m_hWnd, SB_CTL, 0, range1, TRUE);
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#endif
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}
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/* From the WIN32 documentation:
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In version 4.0 or later, the maximum value that a scroll bar can report
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(that is, the maximum scrolling position) depends on the page size.
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If the scroll bar has a page size greater than one, the maximum scrolling position
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is less than the maximum range value. You can use the following formula to calculate
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the maximum scrolling position:
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MaxScrollPos = MaxRangeValue - (PageSize - 1)
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*/
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#if WXWIN_COMPATIBILITY
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void wxScrollBar::SetPageSize(int pageLength)
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{
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m_pageSize = pageLength;
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#if defined(__WIN95__)
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SCROLLINFO info;
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info.cbSize = sizeof(SCROLLINFO);
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info.nPage = pageLength;
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info.fMask = SIF_PAGE ;
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::SetScrollInfo((HWND) GetHWND(), SB_CTL, &info, TRUE);
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#endif
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}
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void wxScrollBar::SetObjectLength(int objectLength)
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{
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m_objectSize = objectLength;
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// The range (number of scroll steps) is the
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// object length minus the view size.
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int range = wxMax((objectLength - m_viewSize), 0) ;
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#if defined(__WIN95__)
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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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range += (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 = 0;
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info.nMin = 0;
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info.nMax = range;
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info.nPos = 0;
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info.fMask = SIF_RANGE ;
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::SetScrollInfo((HWND) GetHWND(), SB_CTL, &info, TRUE);
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#else
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::SetScrollRange((HWND)m_hWnd, SB_CTL, 0, range, TRUE);
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#endif
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}
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void wxScrollBar::SetViewLength(int viewLength)
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{
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m_viewSize = viewLength;
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}
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void wxScrollBar::GetValues(int *viewStart, int *viewLength, int *objectLength,
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int *pageLength) const
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{
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*viewStart = ::GetScrollPos((HWND)m_hWnd, SB_CTL);
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*viewLength = m_viewSize;
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*objectLength = m_objectSize;
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*pageLength = m_pageSize;
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}
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#endif
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WXHBRUSH wxScrollBar::OnCtlColor(WXHDC pDC, WXHWND pWnd, WXUINT nCtlColor,
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WXUINT message, WXWPARAM wParam, WXLPARAM lParam)
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{
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return 0;
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}
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void wxScrollBar::Command(wxCommandEvent& event)
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{
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SetThumbPosition(event.m_commandInt);
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ProcessCommand(event);
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}
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#if WXWIN_COMPATIBILITY
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// Backward compatibility
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void wxScrollBar::OnScroll(wxScrollEvent& event)
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{
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wxEventType oldEvent = event.GetEventType();
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event.SetEventType( wxEVT_COMMAND_SCROLLBAR_UPDATED );
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if ( !GetEventHandler()->ProcessEvent(event) )
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{
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event.SetEventType( oldEvent );
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if (!GetParent()->GetEventHandler()->ProcessEvent(event))
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event.Skip();
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}
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}
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#endif
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