void EPropWnd::SetScrollPage()
{
TR( _T("EPropWnd::SetScrollPage()"), _T(""));
CSize PageSize = GetScrollPageSize();
if( PageSize.cx==0 && PageSize.cy==0 )
{
SetScrollPos ( SB_HORZ , 0 );
SetScrollPos ( SB_VERT , 0 );
ShowScrollBar( SB_BOTH , FALSE );
}
else
{
CRect wr;
GetWindowRect(&wr);
CSize ClientSize = wr.Size();
bool bEnableH = false;
bool bEnableV = false;
if( PageSize.cx > ClientSize.cx )
{
ClientSize.cy -= GetSystemMetrics(SM_CYHSCROLL);
bEnableH = true;
}
if( PageSize.cy > ClientSize.cy )
{
ClientSize.cx -= GetSystemMetrics(SM_CXVSCROLL);
bEnableV = true;
if( bEnableH == false )
{
if( PageSize.cx > ClientSize.cx )
{
ClientSize.cy -= GetSystemMetrics(SM_CYHSCROLL);
bEnableH = true;
}
}
}
//
//
//
SCROLLINFO si;
si.cbSize = sizeof(si);
si.fMask = SIF_PAGE | SIF_POS | SIF_RANGE;
//
// horizontal scroller
//
si.nPage = bEnableH ? ClientSize.cx : 0;
si.nMin = bEnableH ? 0 : 0;
si.nMax = bEnableH ? PageSize.cx-1 : 0;
si.nPos = bEnableH ? GetScrollPos(SB_HORZ) : 0;
SetScrollInfo( SB_HORZ , &si );
ShowScrollBar( SB_HORZ , bEnableH );
//
// vertical scroller
//
si.nPage = bEnableV ? ClientSize.cy : 0;
si.nMin = bEnableV ? 0 : 0;
si.nMax = bEnableV ? PageSize.cy-1 : 0;
si.nPos = bEnableV ? GetScrollPos(SB_VERT) : 0;
SetScrollInfo( SB_VERT , &si );
ShowScrollBar( SB_VERT , bEnableV );
}
}
int wxScrolledWindow::CalcScrollInc(wxScrollWinEvent& event)
{
int pos = event.GetPosition();
int orient = event.GetOrientation();
int nScrollInc = 0;
if (event.GetEventType() == wxEVT_SCROLLWIN_TOP)
{
if (orient == wxHORIZONTAL)
nScrollInc = - m_xScrollPosition;
else
nScrollInc = - m_yScrollPosition;
} else
if (event.GetEventType() == wxEVT_SCROLLWIN_BOTTOM)
{
if (orient == wxHORIZONTAL)
nScrollInc = GetVirtualSize().GetWidth() / m_xScrollPixelsPerLine - m_xScrollPosition;
else
nScrollInc = GetVirtualSize().GetHeight() / m_yScrollPixelsPerLine - m_yScrollPosition;
} else
if (event.GetEventType() == wxEVT_SCROLLWIN_LINEUP)
{
nScrollInc = -1;
} else
if (event.GetEventType() == wxEVT_SCROLLWIN_LINEDOWN)
{
nScrollInc = 1;
} else
if (event.GetEventType() == wxEVT_SCROLLWIN_PAGEUP)
{
if (orient == wxHORIZONTAL)
nScrollInc = -GetScrollPageSize(wxHORIZONTAL);
else
nScrollInc = -GetScrollPageSize(wxVERTICAL);
} else
if (event.GetEventType() == wxEVT_SCROLLWIN_PAGEDOWN)
{
if (orient == wxHORIZONTAL)
nScrollInc = GetScrollPageSize(wxHORIZONTAL);
else
nScrollInc = GetScrollPageSize(wxVERTICAL);
} else
if ((event.GetEventType() == wxEVT_SCROLLWIN_THUMBTRACK) ||
(event.GetEventType() == wxEVT_SCROLLWIN_THUMBRELEASE))
{
if (orient == wxHORIZONTAL)
nScrollInc = pos - m_xScrollPosition;
else
nScrollInc = pos - m_yScrollPosition;
}
if (orient == wxHORIZONTAL)
{
if (m_xScrollPixelsPerLine > 0)
{
int max = (int)(m_hAdjust->upper - m_hAdjust->page_size + 0.5);
if (max < 0) max = 0;
if ( (m_xScrollPosition + nScrollInc) < 0 )
nScrollInc = -m_xScrollPosition; // As -ve as we can go
else if ( (m_xScrollPosition + nScrollInc) > max )
nScrollInc = max - m_xScrollPosition; // As +ve as we can go
}
else
m_targetWindow->Refresh();
}
else
{
if (m_yScrollPixelsPerLine > 0)
{
int max = (int)(m_vAdjust->upper - m_vAdjust->page_size + 0.5);
if (max < 0) max = 0;
if ( (m_yScrollPosition + nScrollInc) < 0 )
nScrollInc = -m_yScrollPosition; // As -ve as we can go
else if ( (m_yScrollPosition + nScrollInc) > max )
nScrollInc = max - m_yScrollPosition; // As +ve as we can go
}
else
m_targetWindow->Refresh();
}
return nScrollInc;
}
void EPropWnd::SetScrollPage()
{
CSize PageSize = GetScrollPageSize();
if( PageSize.cx==0 && PageSize.cy==0 )
{
SetScrollPos ( SB_HORZ , 0 );
SetScrollPos ( SB_VERT , 0 );
ShowScrollBar( SB_BOTH , FALSE );
}
else
{
CRect wr;
GetWindowRect(&wr);
CSize ClientSize = wr.Size();
bool bEnableH = false;
bool bEnableV = false;
if( PageSize.cx > ClientSize.cx )
{
ClientSize.cy -= GetSystemMetrics(SM_CYHSCROLL);
bEnableH = true;
}
if( PageSize.cy > ClientSize.cy )
{
ClientSize.cx -= GetSystemMetrics(SM_CXVSCROLL);
bEnableV = true;
if( bEnableH == false )
{
if( PageSize.cx > ClientSize.cx )
{
ClientSize.cy -= GetSystemMetrics(SM_CYHSCROLL);
bEnableH = true;
}
}
}
SCROLLINFO si;
si.cbSize = sizeof(si);
si.fMask = SIF_PAGE | SIF_POS | SIF_RANGE;
if( bEnableH )
{
si.nPage = ClientSize.cx; //size of scrolltab
si.nMin = 0;
si.nMax = PageSize.cx-1;
si.nPos = GetScrollPos(SB_HORZ);
ShowScrollBar( SB_HORZ , TRUE );
SetScrollInfo( SB_HORZ , &si );
}
else
{
ShowScrollBar( SB_HORZ , FALSE );
SetScrollPos( SB_HORZ , 0 );
}
if( bEnableV )
{
si.nPage = ClientSize.cy; //size of scrolltab
si.nMin = 0;
si.nMax = PageSize.cy-1;
si.nPos = GetScrollPos(SB_VERT);
ShowScrollBar( SB_VERT , TRUE );
SetScrollInfo( SB_VERT , &si );
}
else
{
ShowScrollBar( SB_VERT , FALSE );
SetScrollPos( SB_VERT , 0 );
}
}
}