d4c99d6fa8
X's windows' position. Even without having scrolled anywhere, the device origin of the top left corner is no longer certain to be zero,zero. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@401 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
445 lines
11 KiB
C++
445 lines
11 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// Name: scrolwin.cpp
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// Purpose: wxScrolledWindow 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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#ifdef __GNUG__
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#pragma implementation
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#pragma implementation "scrolwin.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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#include "wx/utils.h"
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#include "wx/dcclient.h"
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#ifdef __WXMSW__
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#include "windows.h"
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#endif
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#ifdef __BORLANDC__
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#pragma hdrstop
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#endif
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#include "wx/generic/scrolwin.h"
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#if !USE_SHARED_LIBRARY
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BEGIN_EVENT_TABLE(wxScrolledWindow, wxWindow)
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EVT_SCROLL(wxScrolledWindow::OnScroll)
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EVT_SIZE(wxScrolledWindow::OnSize)
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EVT_PAINT(wxScrolledWindow::OnPaint)
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END_EVENT_TABLE()
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IMPLEMENT_DYNAMIC_CLASS(wxScrolledWindow, wxWindow)
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#endif
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wxScrolledWindow::wxScrolledWindow(void)
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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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}
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bool wxScrolledWindow::Create(wxWindow *parent, 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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return wxWindow::Create(parent, id, pos, size, style, name);
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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 wxScrolledWindow::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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bool do_refresh =
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(
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(noUnitsX != 0 && m_xScrollLines == 0) ||
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(noUnitsX < m_xScrollPosition) ||
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(noUnitsY != 0 && m_yScrollLines == 0) ||
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(noUnitsY < m_yScrollPosition) ||
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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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AdjustScrollbars();
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if (do_refresh && !noRefresh) Refresh();
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#ifdef __WXMSW__
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UpdateWindow ((HWND) GetHWND());
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#endif
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}
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void wxScrolledWindow::OnScroll(wxScrollEvent& 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)
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return;
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// TODO: should we store the scroll position here as well as in wxWindow?
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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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/*
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// TODO We need to multiply the ScrollWindow amount by the scaling
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// factor, but how do we know what this is in wxWin 2.0???
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float scaleX = 1.0;
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float scaleY = 1.0;
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if ( this->IsKindOf(CLASSINFO(wxCanvas)) )
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{
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wxDC* dc = ((wxCanvas *)this)->GetDC();
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dc->GetUserScale(&scaleX, &scaleY);
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}
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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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ScrollWindow(-m_xScrollPixelsPerLine * nScrollInc, 0, NULL);
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else
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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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ScrollWindow(0, -m_yScrollPixelsPerLine * nScrollInc, NULL);
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else
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Refresh();
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}
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}
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int wxScrolledWindow::CalcScrollInc(wxScrollEvent& 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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switch (event.GetEventType())
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{
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case wxEVENT_TYPE_SCROLL_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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break;
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}
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case wxEVENT_TYPE_SCROLL_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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break;
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}
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case wxEVENT_TYPE_SCROLL_LINEUP:
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{
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nScrollInc = -1;
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break;
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}
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case wxEVENT_TYPE_SCROLL_LINEDOWN:
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{
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nScrollInc = 1;
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break;
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}
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case wxEVENT_TYPE_SCROLL_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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break;
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}
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case wxEVENT_TYPE_SCROLL_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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break;
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}
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case wxEVENT_TYPE_SCROLL_THUMBTRACK:
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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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break;
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}
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default:
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{
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break;
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}
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}
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if (orient == wxHORIZONTAL)
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{
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int w, h;
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GetClientSize(&w, &h);
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int nMaxWidth = m_xScrollLines*m_xScrollPixelsPerLine;
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int noPositions = (int) ( ((nMaxWidth - w)/(float)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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return nScrollInc;
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}
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else
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{
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int w, h;
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GetClientSize(&w, &h);
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int nMaxHeight = m_yScrollLines*m_yScrollPixelsPerLine;
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int noPositions = (int) ( ((nMaxHeight - h)/(float)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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return nScrollInc;
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}
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}
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// Adjust the scrollbars - new version.
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void wxScrolledWindow::AdjustScrollbars(void)
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{
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int w, h;
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GetClientSize(&w, &h);
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// Recalculate scroll bar range and position
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if (m_xScrollLines > 0)
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{
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int nMaxWidth = m_xScrollLines*m_xScrollPixelsPerLine;
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int newRange = (int) ( ((nMaxWidth)/(float)m_xScrollPixelsPerLine) + 0.5 );
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if (newRange < 0)
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newRange = 0;
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m_xScrollPosition = wxMin(newRange, m_xScrollPosition);
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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/(float)m_xScrollPixelsPerLine) + 0.5 );
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if (noPagePositions < 1)
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noPagePositions = 1;
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SetScrollbar(wxHORIZONTAL, m_xScrollPosition, noPagePositions, newRange);
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SetScrollPageSize(wxHORIZONTAL, noPagePositions);
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}
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// Robert Roebling
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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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int nMaxHeight = m_yScrollLines*m_yScrollPixelsPerLine;
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int newRange = (int) ( ((nMaxHeight)/(float)m_yScrollPixelsPerLine) + 0.5 );
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if (newRange < 0)
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newRange = 0;
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m_yScrollPosition = wxMin(newRange, m_yScrollPosition);
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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/(float)m_yScrollPixelsPerLine) + 0.5 );
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if (noPagePositions < 1)
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noPagePositions = 1;
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SetScrollbar(wxVERTICAL, m_yScrollPosition, noPagePositions, newRange);
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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); // Robert Roebling
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}
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}
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// Default OnSize resets scrollbars, if any
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void wxScrolledWindow::OnSize(wxSizeEvent& WXUNUSED(event))
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{
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#if USE_CONSTRAINTS
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if (GetAutoLayout())
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Layout();
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#endif
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AdjustScrollbars();
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}
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// This calls OnDraw, having adjusted the origin according to the current
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// scroll position
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void wxScrolledWindow::OnPaint(wxPaintEvent& WXUNUSED(event))
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{
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wxPaintDC dc(this);
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PrepareDC(dc);
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OnDraw(dc);
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}
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// Override this function if you don't want to have wxScrolledWindow
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// automatically change the origin according to the scroll position.
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void wxScrolledWindow::PrepareDC(wxDC& dc)
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{
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dc.SetDeviceOrigin(- m_xScrollPosition * m_xScrollPixelsPerLine, - m_yScrollPosition * m_yScrollPixelsPerLine);
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}
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#if WXWIN_COMPATIBILITY
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void wxScrolledWindow::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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#endif
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void wxScrolledWindow::GetScrollPixelsPerUnit (int *x_unit, int *y_unit) const
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{
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*x_unit = m_xScrollPixelsPerLine;
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*y_unit = m_yScrollPixelsPerLine;
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}
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int wxScrolledWindow::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 wxScrolledWindow::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 wxScrolledWindow::Scroll (int x_pos, int y_pos)
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{
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int old_x, old_y;
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ViewStart (&old_x, &old_y);
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if (((x_pos == -1) || (x_pos == old_x)) && ((y_pos == -1) || (y_pos == old_y)))
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return;
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if (x_pos > -1)
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{
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m_xScrollPosition = x_pos;
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SetScrollPos (wxHORIZONTAL, x_pos, TRUE);
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}
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if (y_pos > -1)
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{
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m_yScrollPosition = y_pos;
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SetScrollPos (wxVERTICAL, y_pos, TRUE);
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}
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Refresh();
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#ifdef __WXMSW__
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::UpdateWindow ((HWND) GetHWND());
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#endif
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}
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void wxScrolledWindow::EnableScrolling (bool x_scroll, bool y_scroll)
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{
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m_xScrollingEnabled = x_scroll;
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m_yScrollingEnabled = y_scroll;
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}
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void wxScrolledWindow::GetVirtualSize (int *x, int *y) const
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{
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*x = m_xScrollPixelsPerLine * m_xScrollLines;
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*y = m_yScrollPixelsPerLine * m_yScrollLines;
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}
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// Where the current view starts from
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void wxScrolledWindow::ViewStart (int *x, int *y) const
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{
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*x = m_xScrollPosition;
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*y = m_yScrollPosition;
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}
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void wxScrolledWindow::CalcScrolledPosition(int x, int y, int *xx, int *yy) const
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{
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*xx = x - m_xScrollPosition * m_xScrollPixelsPerLine;
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*yy = y - m_yScrollPosition * m_yScrollPixelsPerLine;
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}
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void wxScrolledWindow::CalcUnscrolledPosition(int x, int y, float *xx, float *yy) const
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{
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*xx = (float)(x + m_xScrollPosition * m_xScrollPixelsPerLine);
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*yy = (float)(y + m_yScrollPosition * m_yScrollPixelsPerLine);
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}
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