35b6b7d54a
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@9952 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
705 lines
21 KiB
C++
705 lines
21 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// Name: generic/scrolwin.cpp
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// Purpose: wxGenericScrolledWindow implementation
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// Author: Julian Smart
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// Modified by:
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// Created: 01/02/97
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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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// ============================================================================
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// declarations
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// ============================================================================
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// ----------------------------------------------------------------------------
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// headers
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// ----------------------------------------------------------------------------
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#ifdef __GNUG__
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#pragma implementation "scrolwin.h"
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#endif
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#ifdef __VMS
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#define XtDisplay XTDISPLAY
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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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#include "wx/utils.h"
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#include "wx/dcclient.h"
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#include "wx/generic/scrolwin.h"
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#include "wx/panel.h"
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#ifdef __WXMSW__
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#include "windows.h"
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#endif
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#ifdef __WXMOTIF__
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// For wxRETAINED implementation
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#ifdef __VMS__ //VMS's Xm.h is not (yet) compatible with C++
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//This code switches off the compiler warnings
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# pragma message disable nosimpint
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#endif
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#include <Xm/Xm.h>
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#ifdef __VMS__
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# pragma message enable nosimpint
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#endif
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#endif
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#ifndef __WXGTK__
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#include "wx/scrolwin.h"
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IMPLEMENT_CLASS(wxScrolledWindow, wxGenericScrolledWindow)
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#endif
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// ----------------------------------------------------------------------------
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// event tables
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// ----------------------------------------------------------------------------
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BEGIN_EVENT_TABLE(wxGenericScrolledWindow, wxPanel)
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EVT_SCROLLWIN(wxGenericScrolledWindow::OnScroll)
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EVT_SIZE(wxGenericScrolledWindow::OnSize)
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EVT_PAINT(wxGenericScrolledWindow::OnPaint)
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EVT_CHAR(wxGenericScrolledWindow::OnChar)
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END_EVENT_TABLE()
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IMPLEMENT_DYNAMIC_CLASS(wxGenericScrolledWindow, wxPanel)
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// ============================================================================
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// implementation
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// ============================================================================
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// ----------------------------------------------------------------------------
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// wxGenericScrolledWindow creation
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// ----------------------------------------------------------------------------
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wxGenericScrolledWindow::wxGenericScrolledWindow()
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{
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m_xScrollPixelsPerLine = 0;
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m_yScrollPixelsPerLine = 0;
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m_xScrollingEnabled = TRUE;
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m_yScrollingEnabled = TRUE;
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m_xScrollPosition = 0;
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m_yScrollPosition = 0;
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m_xScrollLines = 0;
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m_yScrollLines = 0;
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m_xScrollLinesPerPage = 0;
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m_yScrollLinesPerPage = 0;
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m_scaleX = 1.0;
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m_scaleY = 1.0;
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m_targetWindow = (wxWindow*) NULL;
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}
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bool wxGenericScrolledWindow::Create(wxWindow *parent,
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wxWindowID id,
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const wxPoint& pos,
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const wxSize& size,
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long style,
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const wxString& name)
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{
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m_xScrollPixelsPerLine = 0;
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m_yScrollPixelsPerLine = 0;
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m_xScrollingEnabled = TRUE;
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m_yScrollingEnabled = TRUE;
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m_xScrollPosition = 0;
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m_yScrollPosition = 0;
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m_xScrollLines = 0;
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m_yScrollLines = 0;
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m_xScrollLinesPerPage = 0;
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m_yScrollLinesPerPage = 0;
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m_scaleX = 1.0;
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m_scaleY = 1.0;
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m_targetWindow = this;
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bool ok = wxPanel::Create(parent, id, pos, size, style, name);
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#ifdef __WXMSW__
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// we need to process arrows ourselves for scrolling
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m_lDlgCode |= DLGC_WANTARROWS;
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#endif // __WXMSW__
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return ok;
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}
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wxGenericScrolledWindow::~wxGenericScrolledWindow()
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{
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}
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// ----------------------------------------------------------------------------
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// setting scrolling parameters
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// ----------------------------------------------------------------------------
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/*
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* pixelsPerUnitX/pixelsPerUnitY: number of pixels per unit (e.g. pixels per text line)
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* noUnitsX/noUnitsY: : no. units per scrollbar
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*/
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void wxGenericScrolledWindow::SetScrollbars (int pixelsPerUnitX, int pixelsPerUnitY,
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int noUnitsX, int noUnitsY,
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int xPos, int yPos, bool noRefresh )
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{
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int xpos, ypos;
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CalcUnscrolledPosition(xPos, yPos, &xpos, &ypos);
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bool do_refresh =
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(
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(noUnitsX != 0 && m_xScrollLines == 0) ||
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(noUnitsX < m_xScrollLines && xpos > pixelsPerUnitX*noUnitsX) ||
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(noUnitsY != 0 && m_yScrollLines == 0) ||
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(noUnitsY < m_yScrollLines && ypos > pixelsPerUnitY*noUnitsY) ||
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(xPos != m_xScrollPosition) ||
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(yPos != m_yScrollPosition)
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// (pixelsPerUnitX != m_xScrollPixelsPerLine) ||
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// (pixelsPerUnitY != m_yScrollPixelsPerLine)
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);
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m_xScrollPixelsPerLine = pixelsPerUnitX;
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m_yScrollPixelsPerLine = pixelsPerUnitY;
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m_xScrollPosition = xPos;
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m_yScrollPosition = yPos;
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m_xScrollLines = noUnitsX;
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m_yScrollLines = noUnitsY;
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#ifdef __WXMOTIF__
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// Sorry, some Motif-specific code to implement a backing pixmap
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// for the wxRETAINED style. Implementing a backing store can't
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// be entirely generic because it relies on the wxWindowDC implementation
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// to duplicate X drawing calls for the backing pixmap.
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if ((m_windowStyle & wxRETAINED) == wxRETAINED)
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{
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Display* dpy = XtDisplay((Widget) GetMainWidget());
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int totalPixelWidth = m_xScrollLines * m_xScrollPixelsPerLine;
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int totalPixelHeight = m_yScrollLines * m_yScrollPixelsPerLine;
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if (m_backingPixmap &&
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!((m_pixmapWidth == totalPixelWidth) &&
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(m_pixmapHeight == totalPixelHeight)))
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{
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XFreePixmap (dpy, (Pixmap) m_backingPixmap);
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m_backingPixmap = (WXPixmap) 0;
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}
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if (!m_backingPixmap &&
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(noUnitsX != 0) && (noUnitsY != 0))
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{
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int depth = wxDisplayDepth();
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m_pixmapWidth = totalPixelWidth;
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m_pixmapHeight = totalPixelHeight;
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m_backingPixmap = (WXPixmap) XCreatePixmap (dpy, RootWindow (dpy, DefaultScreen (dpy)),
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m_pixmapWidth, m_pixmapHeight, depth);
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}
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}
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#endif // Motif
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AdjustScrollbars();
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if (do_refresh && !noRefresh)
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m_targetWindow->Refresh();
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#ifdef __WXMSW__
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// GRG: if this turns out to be really necessary, we could
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// at least move it to the above if { ... } so that it is
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// only done if noRefresh = FALSE (the default). OTOH, if
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// this doesn't break anything, which seems to be the
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// case, we could just leave it out.
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// Necessary?
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// UpdateWindow ((HWND) m_targetWindow->GetHWND());
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#endif
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#ifdef __WXMAC__
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m_targetWindow->MacUpdateImmediately() ;
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#endif
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}
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// ----------------------------------------------------------------------------
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// target window handling
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// ----------------------------------------------------------------------------
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void wxGenericScrolledWindow::SetTargetWindow( wxWindow *target )
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{
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wxASSERT_MSG( target, wxT("target window must not be NULL") );
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m_targetWindow = target;
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}
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wxWindow *wxGenericScrolledWindow::GetTargetWindow()
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{
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return m_targetWindow;
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}
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// ----------------------------------------------------------------------------
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// scrolling implementation itself
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// ----------------------------------------------------------------------------
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void wxGenericScrolledWindow::OnScroll(wxScrollWinEvent& event)
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{
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int orient = event.GetOrientation();
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int nScrollInc = CalcScrollInc(event);
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if (nScrollInc == 0) return;
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if (orient == wxHORIZONTAL)
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{
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int newPos = m_xScrollPosition + nScrollInc;
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SetScrollPos(wxHORIZONTAL, newPos, TRUE );
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}
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else
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{
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int newPos = m_yScrollPosition + nScrollInc;
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SetScrollPos(wxVERTICAL, newPos, TRUE );
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}
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if (orient == wxHORIZONTAL)
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{
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m_xScrollPosition += nScrollInc;
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}
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else
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{
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m_yScrollPosition += nScrollInc;
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}
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if (orient == wxHORIZONTAL)
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{
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if (m_xScrollingEnabled)
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m_targetWindow->ScrollWindow(-m_xScrollPixelsPerLine * nScrollInc, 0, (const wxRect *) NULL);
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else
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m_targetWindow->Refresh();
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}
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else
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{
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if (m_yScrollingEnabled)
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m_targetWindow->ScrollWindow(0, -m_yScrollPixelsPerLine * nScrollInc, (const wxRect *) NULL);
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else
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m_targetWindow->Refresh();
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}
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#ifdef __WXMAC__
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m_targetWindow->MacUpdateImmediately() ;
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#endif
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}
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int wxGenericScrolledWindow::CalcScrollInc(wxScrollWinEvent& event)
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{
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int pos = event.GetPosition();
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int orient = event.GetOrientation();
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int nScrollInc = 0;
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if (event.GetEventType() == wxEVT_SCROLLWIN_TOP)
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{
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if (orient == wxHORIZONTAL)
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nScrollInc = - m_xScrollPosition;
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else
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nScrollInc = - m_yScrollPosition;
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} else
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if (event.GetEventType() == wxEVT_SCROLLWIN_BOTTOM)
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{
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if (orient == wxHORIZONTAL)
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nScrollInc = m_xScrollLines - m_xScrollPosition;
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else
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nScrollInc = m_yScrollLines - m_yScrollPosition;
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} else
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if (event.GetEventType() == wxEVT_SCROLLWIN_LINEUP)
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{
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nScrollInc = -1;
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} else
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if (event.GetEventType() == wxEVT_SCROLLWIN_LINEDOWN)
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{
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nScrollInc = 1;
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} else
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if (event.GetEventType() == wxEVT_SCROLLWIN_PAGEUP)
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{
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if (orient == wxHORIZONTAL)
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nScrollInc = -GetScrollPageSize(wxHORIZONTAL);
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else
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nScrollInc = -GetScrollPageSize(wxVERTICAL);
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} else
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if (event.GetEventType() == wxEVT_SCROLLWIN_PAGEDOWN)
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{
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if (orient == wxHORIZONTAL)
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nScrollInc = GetScrollPageSize(wxHORIZONTAL);
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else
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nScrollInc = GetScrollPageSize(wxVERTICAL);
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} else
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if ((event.GetEventType() == wxEVT_SCROLLWIN_THUMBTRACK) ||
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(event.GetEventType() == wxEVT_SCROLLWIN_THUMBRELEASE))
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{
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if (orient == wxHORIZONTAL)
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nScrollInc = pos - m_xScrollPosition;
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else
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nScrollInc = pos - m_yScrollPosition;
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}
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if (orient == wxHORIZONTAL)
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{
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if (m_xScrollPixelsPerLine > 0)
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{
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int w, h;
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m_targetWindow->GetClientSize(&w, &h);
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int nMaxWidth = m_xScrollLines*m_xScrollPixelsPerLine;
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int noPositions = (int) ( ((nMaxWidth - w)/(double)m_xScrollPixelsPerLine) + 0.5 );
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if (noPositions < 0)
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noPositions = 0;
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if ( (m_xScrollPosition + nScrollInc) < 0 )
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nScrollInc = -m_xScrollPosition; // As -ve as we can go
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else if ( (m_xScrollPosition + nScrollInc) > noPositions )
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nScrollInc = noPositions - m_xScrollPosition; // As +ve as we can go
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}
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else
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m_targetWindow->Refresh();
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}
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else
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{
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if (m_yScrollPixelsPerLine > 0)
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{
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int w, h;
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m_targetWindow->GetClientSize(&w, &h);
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int nMaxHeight = m_yScrollLines*m_yScrollPixelsPerLine;
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int noPositions = (int) ( ((nMaxHeight - h)/(double)m_yScrollPixelsPerLine) + 0.5 );
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if (noPositions < 0)
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noPositions = 0;
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if ( (m_yScrollPosition + nScrollInc) < 0 )
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nScrollInc = -m_yScrollPosition; // As -ve as we can go
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else if ( (m_yScrollPosition + nScrollInc) > noPositions )
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nScrollInc = noPositions - m_yScrollPosition; // As +ve as we can go
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}
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else
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m_targetWindow->Refresh();
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}
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return nScrollInc;
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}
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// Adjust the scrollbars - new version.
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void wxGenericScrolledWindow::AdjustScrollbars()
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{
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int w, h;
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m_targetWindow->GetClientSize(&w, &h);
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int oldXScroll = m_xScrollPosition;
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int oldYScroll = m_yScrollPosition;
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if (m_xScrollLines > 0)
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{
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// Calculate page size i.e. number of scroll units you get on the
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// current client window
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int noPagePositions = (int) ( (w/(double)m_xScrollPixelsPerLine) + 0.5 );
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if (noPagePositions < 1) noPagePositions = 1;
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// Correct position if greater than extent of canvas minus
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// the visible portion of it or if below zero
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m_xScrollPosition = wxMin( m_xScrollLines-noPagePositions, m_xScrollPosition);
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m_xScrollPosition = wxMax( 0, m_xScrollPosition );
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SetScrollbar(wxHORIZONTAL, m_xScrollPosition, noPagePositions, m_xScrollLines);
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// The amount by which we scroll when paging
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SetScrollPageSize(wxHORIZONTAL, noPagePositions);
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}
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else
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{
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m_xScrollPosition = 0;
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SetScrollbar (wxHORIZONTAL, 0, 0, 0, FALSE);
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}
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if (m_yScrollLines > 0)
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{
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// Calculate page size i.e. number of scroll units you get on the
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// current client window
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int noPagePositions = (int) ( (h/(double)m_yScrollPixelsPerLine) + 0.5 );
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if (noPagePositions < 1) noPagePositions = 1;
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// Correct position if greater than extent of canvas minus
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// the visible portion of it or if below zero
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m_yScrollPosition = wxMin( m_yScrollLines-noPagePositions, m_yScrollPosition );
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m_yScrollPosition = wxMax( 0, m_yScrollPosition );
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SetScrollbar(wxVERTICAL, m_yScrollPosition, noPagePositions, m_yScrollLines);
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// The amount by which we scroll when paging
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SetScrollPageSize(wxVERTICAL, noPagePositions);
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}
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else
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{
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m_yScrollPosition = 0;
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SetScrollbar (wxVERTICAL, 0, 0, 0, FALSE);
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}
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if (oldXScroll != m_xScrollPosition)
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{
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if (m_xScrollingEnabled)
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m_targetWindow->ScrollWindow( m_xScrollPixelsPerLine * (oldXScroll-m_xScrollPosition), 0, (const wxRect *) NULL );
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else
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m_targetWindow->Refresh();
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}
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if (oldYScroll != m_yScrollPosition)
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{
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if (m_yScrollingEnabled)
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m_targetWindow->ScrollWindow( 0, m_yScrollPixelsPerLine * (oldYScroll-m_yScrollPosition), (const wxRect *) NULL );
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else
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m_targetWindow->Refresh();
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}
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}
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// Override this function if you don't want to have wxGenericScrolledWindow
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// automatically change the origin according to the scroll position.
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void wxGenericScrolledWindow::PrepareDC(wxDC& dc)
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{
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dc.SetDeviceOrigin( -m_xScrollPosition * m_xScrollPixelsPerLine,
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-m_yScrollPosition * m_yScrollPixelsPerLine );
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dc.SetUserScale( m_scaleX, m_scaleY );
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}
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#if WXWIN_COMPATIBILITY
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void wxGenericScrolledWindow::GetScrollUnitsPerPage (int *x_page, int *y_page) const
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{
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*x_page = GetScrollPageSize(wxHORIZONTAL);
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*y_page = GetScrollPageSize(wxVERTICAL);
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}
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void wxGenericScrolledWindow::CalcUnscrolledPosition(int x, int y, float *xx, float *yy) const
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{
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if ( xx )
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*xx = (float)(x + m_xScrollPosition * m_xScrollPixelsPerLine);
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if ( yy )
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*yy = (float)(y + m_yScrollPosition * m_yScrollPixelsPerLine);
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}
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#endif // WXWIN_COMPATIBILITY
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void wxGenericScrolledWindow::GetScrollPixelsPerUnit (int *x_unit, int *y_unit) const
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{
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if ( x_unit )
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*x_unit = m_xScrollPixelsPerLine;
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if ( y_unit )
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*y_unit = m_yScrollPixelsPerLine;
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}
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int wxGenericScrolledWindow::GetScrollPageSize(int orient) const
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{
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if ( orient == wxHORIZONTAL )
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return m_xScrollLinesPerPage;
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else
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return m_yScrollLinesPerPage;
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}
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void wxGenericScrolledWindow::SetScrollPageSize(int orient, int pageSize)
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{
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if ( orient == wxHORIZONTAL )
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m_xScrollLinesPerPage = pageSize;
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else
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m_yScrollLinesPerPage = pageSize;
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}
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/*
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* Scroll to given position (scroll position, not pixel position)
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*/
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void wxGenericScrolledWindow::Scroll( int x_pos, int y_pos )
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{
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if (!m_targetWindow)
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return;
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if (((x_pos == -1) || (x_pos == m_xScrollPosition)) &&
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((y_pos == -1) || (y_pos == m_yScrollPosition))) return;
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int w, h;
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m_targetWindow->GetClientSize(&w, &h);
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if ((x_pos != -1) && (m_xScrollPixelsPerLine))
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{
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int old_x = m_xScrollPosition;
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m_xScrollPosition = x_pos;
|
|
|
|
// Calculate page size i.e. number of scroll units you get on the
|
|
// current client window
|
|
int noPagePositions = (int) ( (w/(double)m_xScrollPixelsPerLine) + 0.5 );
|
|
if (noPagePositions < 1) noPagePositions = 1;
|
|
|
|
// Correct position if greater than extent of canvas minus
|
|
// the visible portion of it or if below zero
|
|
m_xScrollPosition = wxMin( m_xScrollLines-noPagePositions, m_xScrollPosition );
|
|
m_xScrollPosition = wxMax( 0, m_xScrollPosition );
|
|
|
|
if (old_x != m_xScrollPosition) {
|
|
m_targetWindow->SetScrollPos( wxHORIZONTAL, m_xScrollPosition, TRUE );
|
|
m_targetWindow->ScrollWindow( (old_x-m_xScrollPosition)*m_xScrollPixelsPerLine, 0 );
|
|
}
|
|
}
|
|
if ((y_pos != -1) && (m_yScrollPixelsPerLine))
|
|
{
|
|
int old_y = m_yScrollPosition;
|
|
m_yScrollPosition = y_pos;
|
|
|
|
// Calculate page size i.e. number of scroll units you get on the
|
|
// current client window
|
|
int noPagePositions = (int) ( (h/(double)m_yScrollPixelsPerLine) + 0.5 );
|
|
if (noPagePositions < 1) noPagePositions = 1;
|
|
|
|
// Correct position if greater than extent of canvas minus
|
|
// the visible portion of it or if below zero
|
|
m_yScrollPosition = wxMin( m_yScrollLines-noPagePositions, m_yScrollPosition );
|
|
m_yScrollPosition = wxMax( 0, m_yScrollPosition );
|
|
|
|
if (old_y != m_yScrollPosition) {
|
|
m_targetWindow->SetScrollPos( wxVERTICAL, m_yScrollPosition, TRUE );
|
|
m_targetWindow->ScrollWindow( 0, (old_y-m_yScrollPosition)*m_yScrollPixelsPerLine );
|
|
}
|
|
}
|
|
|
|
#ifdef __WXMAC__
|
|
m_targetWindow->MacUpdateImmediately();
|
|
#endif
|
|
}
|
|
|
|
void wxGenericScrolledWindow::EnableScrolling (bool x_scroll, bool y_scroll)
|
|
{
|
|
m_xScrollingEnabled = x_scroll;
|
|
m_yScrollingEnabled = y_scroll;
|
|
}
|
|
|
|
void wxGenericScrolledWindow::GetVirtualSize (int *x, int *y) const
|
|
{
|
|
if ( x )
|
|
*x = m_xScrollPixelsPerLine * m_xScrollLines;
|
|
if ( y )
|
|
*y = m_yScrollPixelsPerLine * m_yScrollLines;
|
|
}
|
|
|
|
// Where the current view starts from
|
|
void wxGenericScrolledWindow::GetViewStart (int *x, int *y) const
|
|
{
|
|
if ( x )
|
|
*x = m_xScrollPosition;
|
|
if ( y )
|
|
*y = m_yScrollPosition;
|
|
}
|
|
|
|
void wxGenericScrolledWindow::CalcScrolledPosition(int x, int y, int *xx, int *yy) const
|
|
{
|
|
if ( xx )
|
|
*xx = x - m_xScrollPosition * m_xScrollPixelsPerLine;
|
|
if ( yy )
|
|
*yy = y - m_yScrollPosition * m_yScrollPixelsPerLine;
|
|
}
|
|
|
|
void wxGenericScrolledWindow::CalcUnscrolledPosition(int x, int y, int *xx, int *yy) const
|
|
{
|
|
if ( xx )
|
|
*xx = x + m_xScrollPosition * m_xScrollPixelsPerLine;
|
|
if ( yy )
|
|
*yy = y + m_yScrollPosition * m_yScrollPixelsPerLine;
|
|
}
|
|
|
|
// ----------------------------------------------------------------------------
|
|
// event handlers
|
|
// ----------------------------------------------------------------------------
|
|
|
|
// Default OnSize resets scrollbars, if any
|
|
void wxGenericScrolledWindow::OnSize(wxSizeEvent& WXUNUSED(event))
|
|
{
|
|
#if wxUSE_CONSTRAINTS
|
|
if (GetAutoLayout())
|
|
Layout();
|
|
#endif
|
|
|
|
AdjustScrollbars();
|
|
}
|
|
|
|
// This calls OnDraw, having adjusted the origin according to the current
|
|
// scroll position
|
|
void wxGenericScrolledWindow::OnPaint(wxPaintEvent& WXUNUSED(event))
|
|
{
|
|
wxPaintDC dc(this);
|
|
PrepareDC(dc);
|
|
|
|
OnDraw(dc);
|
|
}
|
|
|
|
// kbd handling: notice that we use OnChar() and not OnKeyDown() for
|
|
// compatibility here - if we used OnKeyDown(), the programs which process
|
|
// arrows themselves in their OnChar() would never get the message and like
|
|
// this they always have the priority
|
|
void wxGenericScrolledWindow::OnChar(wxKeyEvent& event)
|
|
{
|
|
int stx, sty, // view origin
|
|
szx, szy, // view size (total)
|
|
clix, cliy; // view size (on screen)
|
|
|
|
ViewStart(&stx, &sty);
|
|
GetClientSize(&clix, &cliy);
|
|
GetVirtualSize(&szx, &szy);
|
|
|
|
if( m_xScrollPixelsPerLine )
|
|
{
|
|
clix /= m_xScrollPixelsPerLine;
|
|
szx /= m_xScrollPixelsPerLine;
|
|
}
|
|
else
|
|
{
|
|
clix = 0;
|
|
szx = -1;
|
|
}
|
|
if( m_yScrollPixelsPerLine )
|
|
{
|
|
cliy /= m_yScrollPixelsPerLine;
|
|
szy /= m_yScrollPixelsPerLine;
|
|
}
|
|
else
|
|
{
|
|
cliy = 0;
|
|
szy = -1;
|
|
}
|
|
|
|
int dsty;
|
|
switch ( event.KeyCode() )
|
|
{
|
|
case WXK_PAGEUP:
|
|
case WXK_PRIOR:
|
|
dsty = sty - (5 * cliy / 6);
|
|
Scroll(-1, (dsty == -1) ? 0 : dsty);
|
|
break;
|
|
|
|
case WXK_PAGEDOWN:
|
|
case WXK_NEXT:
|
|
Scroll(-1, sty + (5 * cliy / 6));
|
|
break;
|
|
|
|
case WXK_HOME:
|
|
Scroll(0, event.ControlDown() ? 0 : -1);
|
|
break;
|
|
|
|
case WXK_END:
|
|
Scroll(szx - clix, event.ControlDown() ? szy - cliy : -1);
|
|
break;
|
|
|
|
case WXK_UP:
|
|
Scroll(-1, sty - 1);
|
|
break;
|
|
|
|
case WXK_DOWN:
|
|
Scroll(-1, sty + 1);
|
|
break;
|
|
|
|
case WXK_LEFT:
|
|
Scroll(stx - 1, -1);
|
|
break;
|
|
|
|
case WXK_RIGHT:
|
|
Scroll(stx + 1, -1);
|
|
break;
|
|
|
|
default:
|
|
// not for us
|
|
event.Skip();
|
|
}
|
|
}
|