X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/47d67540a017101b3e46abe9ef0f55914d8de37e..6ba636000f13b4bf7d3e7dcfad429713085f6700:/src/generic/scrolwin.cpp?ds=inline diff --git a/src/generic/scrolwin.cpp b/src/generic/scrolwin.cpp index 563365f3ba..18939cb0b8 100644 --- a/src/generic/scrolwin.cpp +++ b/src/generic/scrolwin.cpp @@ -1,362 +1,472 @@ ///////////////////////////////////////////////////////////////////////////// -// Name: scrolwin.cpp +// Name: generic/scrolwin.cpp // Purpose: wxScrolledWindow implementation // Author: Julian Smart // Modified by: // Created: 01/02/97 // RCS-ID: $Id$ // Copyright: (c) Julian Smart and Markus Holzem -// Licence: wxWindows license +// Licence: wxWindows license ///////////////////////////////////////////////////////////////////////////// +// ============================================================================ +// declarations +// ============================================================================ + +// ---------------------------------------------------------------------------- +// headers +// ---------------------------------------------------------------------------- + #ifdef __GNUG__ -#pragma implementation -#pragma implementation "scrolwin.h" + #pragma implementation "scrolwin.h" +#endif + +#ifdef __VMS +#define XtDisplay XTDISPLAY #endif // For compilers that support precompilation, includes "wx.h". #include "wx/wxprec.h" +#ifdef __BORLANDC__ + #pragma hdrstop +#endif + #include "wx/utils.h" #include "wx/dcclient.h" +#include "wx/generic/scrolwin.h" +#include "wx/panel.h" + #ifdef __WXMSW__ -#include "windows.h" + #include "windows.h" #endif -#ifdef __BORLANDC__ -#pragma hdrstop +#ifdef __WXMOTIF__ +// For wxRETAINED implementation +#ifdef __VMS__ //VMS's Xm.h is not (yet) compatible with C++ + //This code switches off the compiler warnings +# pragma message disable nosimpint +#endif +#include +#ifdef __VMS__ +# pragma message enable nosimpint +#endif #endif -#include "wx/generic/scrolwin.h" +// ---------------------------------------------------------------------------- +// event tables +// ---------------------------------------------------------------------------- -#if !USE_SHARED_LIBRARY -BEGIN_EVENT_TABLE(wxScrolledWindow, wxWindow) - EVT_SCROLL(wxScrolledWindow::OnScroll) - EVT_SIZE(wxScrolledWindow::OnSize) - EVT_PAINT(wxScrolledWindow::OnPaint) +BEGIN_EVENT_TABLE(wxScrolledWindow, wxPanel) + EVT_SCROLLWIN(wxScrolledWindow::OnScroll) + EVT_SIZE(wxScrolledWindow::OnSize) + EVT_PAINT(wxScrolledWindow::OnPaint) + EVT_CHAR(wxScrolledWindow::OnChar) END_EVENT_TABLE() -IMPLEMENT_DYNAMIC_CLASS(wxScrolledWindow, wxWindow) -#endif +IMPLEMENT_DYNAMIC_CLASS(wxScrolledWindow, wxPanel) + +// ============================================================================ +// implementation +// ============================================================================ -wxScrolledWindow::wxScrolledWindow(void) +// ---------------------------------------------------------------------------- +// wxScrolledWindow creation +// ---------------------------------------------------------------------------- + +wxScrolledWindow::wxScrolledWindow() { - m_xScrollPixelsPerLine = 0; - m_yScrollPixelsPerLine = 0; - m_xScrollingEnabled = TRUE; - m_yScrollingEnabled = TRUE; - m_xScrollPosition = 0; - m_yScrollPosition = 0; - m_xScrollLines = 0; - m_yScrollLines = 0; - m_xScrollLinesPerPage = 0; - m_yScrollLinesPerPage = 0; - m_scaleX = 1.0; - m_scaleY = 1.0; + m_xScrollPixelsPerLine = 0; + m_yScrollPixelsPerLine = 0; + m_xScrollingEnabled = TRUE; + m_yScrollingEnabled = TRUE; + m_xScrollPosition = 0; + m_yScrollPosition = 0; + m_xScrollLines = 0; + m_yScrollLines = 0; + m_xScrollLinesPerPage = 0; + m_yScrollLinesPerPage = 0; + m_scaleX = 1.0; + m_scaleY = 1.0; + m_targetWindow = (wxWindow*) NULL; +} + +bool wxScrolledWindow::Create(wxWindow *parent, + wxWindowID id, + const wxPoint& pos, + const wxSize& size, + long style, + const wxString& name) +{ + m_xScrollPixelsPerLine = 0; + m_yScrollPixelsPerLine = 0; + m_xScrollingEnabled = TRUE; + m_yScrollingEnabled = TRUE; + m_xScrollPosition = 0; + m_yScrollPosition = 0; + m_xScrollLines = 0; + m_yScrollLines = 0; + m_xScrollLinesPerPage = 0; + m_yScrollLinesPerPage = 0; + m_scaleX = 1.0; + m_scaleY = 1.0; + + m_targetWindow = this; + + bool ok = wxPanel::Create(parent, id, pos, size, style, name); + +#ifdef __WXMSW__ + // we need to process arrows ourselves for scrolling + m_lDlgCode |= DLGC_WANTARROWS; +#endif // __WXMSW__ + + return ok; } -bool wxScrolledWindow::Create(wxWindow *parent, wxWindowID id, - const wxPoint& pos, - const wxSize& size, - long style, - const wxString& name) +wxScrolledWindow::~wxScrolledWindow() { - m_xScrollPixelsPerLine = 0; - m_yScrollPixelsPerLine = 0; - m_xScrollingEnabled = TRUE; - m_yScrollingEnabled = TRUE; - m_xScrollPosition = 0; - m_yScrollPosition = 0; - m_xScrollLines = 0; - m_yScrollLines = 0; - m_xScrollLinesPerPage = 0; - m_yScrollLinesPerPage = 0; - m_scaleX = 1.0; - m_scaleY = 1.0; - - return wxWindow::Create(parent, id, pos, size, style, name); } +// ---------------------------------------------------------------------------- +// setting scrolling parameters +// ---------------------------------------------------------------------------- + /* * pixelsPerUnitX/pixelsPerUnitY: number of pixels per unit (e.g. pixels per text line) * noUnitsX/noUnitsY: : no. units per scrollbar */ void wxScrolledWindow::SetScrollbars (int pixelsPerUnitX, int pixelsPerUnitY, - int noUnitsX, int noUnitsY, - int xPos, int yPos, bool noRefresh ) + int noUnitsX, int noUnitsY, + int xPos, int yPos, bool noRefresh ) { - bool do_refresh = - ( + int xpos, ypos; + + CalcUnscrolledPosition(xPos, yPos, &xpos, &ypos); + bool do_refresh = + ( (noUnitsX != 0 && m_xScrollLines == 0) || - (noUnitsX < m_xScrollPosition) || + (noUnitsX < m_xScrollLines && xpos > pixelsPerUnitX*noUnitsX) || + (noUnitsY != 0 && m_yScrollLines == 0) || - (noUnitsY < m_yScrollPosition) || + (noUnitsY < m_yScrollLines && ypos > pixelsPerUnitY*noUnitsY) || (xPos != m_xScrollPosition) || - (yPos != m_yScrollPosition) || - (pixelsPerUnitX != m_xScrollPixelsPerLine) || - (pixelsPerUnitY != m_yScrollPixelsPerLine) - ); - - m_xScrollPixelsPerLine = pixelsPerUnitX; - m_yScrollPixelsPerLine = pixelsPerUnitY; - m_xScrollPosition = xPos; - m_yScrollPosition = yPos; - m_xScrollLines = noUnitsX; - m_yScrollLines = noUnitsY; - - AdjustScrollbars(); - - if (do_refresh && !noRefresh) Refresh(); - + (yPos != m_yScrollPosition) +// (pixelsPerUnitX != m_xScrollPixelsPerLine) || +// (pixelsPerUnitY != m_yScrollPixelsPerLine) + ); + + m_xScrollPixelsPerLine = pixelsPerUnitX; + m_yScrollPixelsPerLine = pixelsPerUnitY; + m_xScrollPosition = xPos; + m_yScrollPosition = yPos; + m_xScrollLines = noUnitsX; + m_yScrollLines = noUnitsY; + +#ifdef __WXMOTIF__ + // Sorry, some Motif-specific code to implement a backing pixmap + // for the wxRETAINED style. Implementing a backing store can't + // be entirely generic because it relies on the wxWindowDC implementation + // to duplicate X drawing calls for the backing pixmap. + + if ((m_windowStyle & wxRETAINED) == wxRETAINED) + { + Display* dpy = XtDisplay((Widget) GetMainWidget()); + + int totalPixelWidth = m_xScrollLines * m_xScrollPixelsPerLine; + int totalPixelHeight = m_yScrollLines * m_yScrollPixelsPerLine; + if (m_backingPixmap && + !((m_pixmapWidth == totalPixelWidth) && + (m_pixmapHeight == totalPixelHeight))) + { + XFreePixmap (dpy, (Pixmap) m_backingPixmap); + m_backingPixmap = (WXPixmap) 0; + } + + if (!m_backingPixmap && + (noUnitsX != 0) && (noUnitsY != 0)) + { + int depth = wxDisplayDepth(); + m_pixmapWidth = totalPixelWidth; + m_pixmapHeight = totalPixelHeight; + m_backingPixmap = (WXPixmap) XCreatePixmap (dpy, RootWindow (dpy, DefaultScreen (dpy)), + m_pixmapWidth, m_pixmapHeight, depth); + } + + } +#endif // Motif + + AdjustScrollbars(); + + if (do_refresh && !noRefresh) + m_targetWindow->Refresh(); + #ifdef __WXMSW__ - UpdateWindow ((HWND) GetHWND()); + // GRG: if this turns out to be really necessary, we could + // at least move it to the above if { ... } so that it is + // only done if noRefresh = FALSE (the default). OTOH, if + // this doesn't break anything, which seems to be the + // case, we could just leave it out. + + // Necessary? + // UpdateWindow ((HWND) m_targetWindow->GetHWND()); +#endif +#ifdef __WXMAC__ + m_targetWindow->MacUpdateImmediately() ; #endif } -void wxScrolledWindow::OnScroll(wxScrollEvent& event) -{ - int orient = event.GetOrientation(); - - int nScrollInc = CalcScrollInc(event); - if (nScrollInc == 0) - return; - - // TODO: should we store the scroll position here as well as in wxWindow? - if (orient == wxHORIZONTAL) - { - int newPos = m_xScrollPosition + nScrollInc; - SetScrollPos(wxHORIZONTAL, newPos, TRUE ); - } - else - { - int newPos = m_yScrollPosition + nScrollInc; - SetScrollPos(wxVERTICAL, newPos, TRUE ); - } +// ---------------------------------------------------------------------------- +// target window handling +// ---------------------------------------------------------------------------- -/* - // TODO We need to multiply the ScrollWindow amount by the scaling - // factor, but how do we know what this is in wxWin 2.0??? - float scaleX = 1.0; - float scaleY = 1.0; - - if ( this->IsKindOf(CLASSINFO(wxCanvas)) ) - { - wxDC* dc = ((wxCanvas *)this)->GetDC(); - dc->GetUserScale(&scaleX, &scaleY); - } -*/ - - if (orient == wxHORIZONTAL) - { - m_xScrollPosition += nScrollInc; - } - else - { - m_yScrollPosition += nScrollInc; - } - - if (orient == wxHORIZONTAL) - { - if (m_xScrollingEnabled) - ScrollWindow(-m_xScrollPixelsPerLine * nScrollInc, 0, (const wxRect *) NULL); - else - Refresh(); - } - else - { - if (m_yScrollingEnabled) - ScrollWindow(0, -m_yScrollPixelsPerLine * nScrollInc, (const wxRect *) NULL); - else - Refresh(); - } +void wxScrolledWindow::SetTargetWindow( wxWindow *target ) +{ + wxASSERT_MSG( target, wxT("target window must not be NULL") ); + m_targetWindow = target; +} +wxWindow *wxScrolledWindow::GetTargetWindow() +{ + return m_targetWindow; } -int wxScrolledWindow::CalcScrollInc(wxScrollEvent& event) +// ---------------------------------------------------------------------------- +// scrolling implementation itself +// ---------------------------------------------------------------------------- + +void wxScrolledWindow::OnScroll(wxScrollWinEvent& event) { - int pos = event.GetPosition(); - int orient = event.GetOrientation(); + int orient = event.GetOrientation(); - int nScrollInc = 0; - switch (event.GetEventType()) - { - case wxEVENT_TYPE_SCROLL_TOP: + int nScrollInc = CalcScrollInc(event); + if (nScrollInc == 0) return; + + if (orient == wxHORIZONTAL) { - if (orient == wxHORIZONTAL) - nScrollInc = - m_xScrollPosition; - else - nScrollInc = - m_yScrollPosition; - break; + int newPos = m_xScrollPosition + nScrollInc; + SetScrollPos(wxHORIZONTAL, newPos, TRUE ); } - case wxEVENT_TYPE_SCROLL_BOTTOM: + else { - if (orient == wxHORIZONTAL) - nScrollInc = m_xScrollLines - m_xScrollPosition; - else - nScrollInc = m_yScrollLines - m_yScrollPosition; - break; + int newPos = m_yScrollPosition + nScrollInc; + SetScrollPos(wxVERTICAL, newPos, TRUE ); } - case wxEVENT_TYPE_SCROLL_LINEUP: + + if (orient == wxHORIZONTAL) { - nScrollInc = -1; - break; + m_xScrollPosition += nScrollInc; } - case wxEVENT_TYPE_SCROLL_LINEDOWN: + else { - nScrollInc = 1; - break; + m_yScrollPosition += nScrollInc; } - case wxEVENT_TYPE_SCROLL_PAGEUP: + + if (orient == wxHORIZONTAL) + { + if (m_xScrollingEnabled) + m_targetWindow->ScrollWindow(-m_xScrollPixelsPerLine * nScrollInc, 0, (const wxRect *) NULL); + else + m_targetWindow->Refresh(); + } + else { - if (orient == wxHORIZONTAL) - nScrollInc = -GetScrollPageSize(wxHORIZONTAL); - else - nScrollInc = -GetScrollPageSize(wxVERTICAL); - break; + if (m_yScrollingEnabled) + m_targetWindow->ScrollWindow(0, -m_yScrollPixelsPerLine * nScrollInc, (const wxRect *) NULL); + else + m_targetWindow->Refresh(); } - case wxEVENT_TYPE_SCROLL_PAGEDOWN: +#ifdef __WXMAC__ + m_targetWindow->MacUpdateImmediately() ; +#endif +} + +int wxScrolledWindow::CalcScrollInc(wxScrollWinEvent& event) +{ + int pos = event.GetPosition(); + int orient = event.GetOrientation(); + + int nScrollInc = 0; + switch (event.GetEventType()) { - if (orient == wxHORIZONTAL) - nScrollInc = GetScrollPageSize(wxHORIZONTAL); - else - nScrollInc = GetScrollPageSize(wxVERTICAL); - break; + case wxEVT_SCROLLWIN_TOP: + { + if (orient == wxHORIZONTAL) + nScrollInc = - m_xScrollPosition; + else + nScrollInc = - m_yScrollPosition; + break; + } + case wxEVT_SCROLLWIN_BOTTOM: + { + if (orient == wxHORIZONTAL) + nScrollInc = m_xScrollLines - m_xScrollPosition; + else + nScrollInc = m_yScrollLines - m_yScrollPosition; + break; + } + case wxEVT_SCROLLWIN_LINEUP: + { + nScrollInc = -1; + break; + } + case wxEVT_SCROLLWIN_LINEDOWN: + { + nScrollInc = 1; + break; + } + case wxEVT_SCROLLWIN_PAGEUP: + { + if (orient == wxHORIZONTAL) + nScrollInc = -GetScrollPageSize(wxHORIZONTAL); + else + nScrollInc = -GetScrollPageSize(wxVERTICAL); + break; + } + case wxEVT_SCROLLWIN_PAGEDOWN: + { + if (orient == wxHORIZONTAL) + nScrollInc = GetScrollPageSize(wxHORIZONTAL); + else + nScrollInc = GetScrollPageSize(wxVERTICAL); + break; + } + case wxEVT_SCROLLWIN_THUMBTRACK: + case wxEVT_SCROLLWIN_THUMBRELEASE: + { + if (orient == wxHORIZONTAL) + nScrollInc = pos - m_xScrollPosition; + else + nScrollInc = pos - m_yScrollPosition; + break; + } + default: + { + break; + } } - case wxEVENT_TYPE_SCROLL_THUMBTRACK: + + if (orient == wxHORIZONTAL) { - if (orient == wxHORIZONTAL) - nScrollInc = pos - m_xScrollPosition; - else - nScrollInc = pos - m_yScrollPosition; - break; + if (m_xScrollPixelsPerLine > 0) + { + int w, h; + m_targetWindow->GetClientSize(&w, &h); + + int nMaxWidth = m_xScrollLines*m_xScrollPixelsPerLine; + int noPositions = (int) ( ((nMaxWidth - w)/(double)m_xScrollPixelsPerLine) + 0.5 ); + if (noPositions < 0) + noPositions = 0; + + if ( (m_xScrollPosition + nScrollInc) < 0 ) + nScrollInc = -m_xScrollPosition; // As -ve as we can go + else if ( (m_xScrollPosition + nScrollInc) > noPositions ) + nScrollInc = noPositions - m_xScrollPosition; // As +ve as we can go + } + else + m_targetWindow->Refresh(); } - default: + else { - break; + if (m_yScrollPixelsPerLine > 0) + { + int w, h; + m_targetWindow->GetClientSize(&w, &h); + + int nMaxHeight = m_yScrollLines*m_yScrollPixelsPerLine; + int noPositions = (int) ( ((nMaxHeight - h)/(double)m_yScrollPixelsPerLine) + 0.5 ); + if (noPositions < 0) + noPositions = 0; + + if ( (m_yScrollPosition + nScrollInc) < 0 ) + nScrollInc = -m_yScrollPosition; // As -ve as we can go + else if ( (m_yScrollPosition + nScrollInc) > noPositions ) + nScrollInc = noPositions - m_yScrollPosition; // As +ve as we can go + } + else + m_targetWindow->Refresh(); } - } - if (orient == wxHORIZONTAL) - { - int w, h; - GetClientSize(&w, &h); - - int nMaxWidth = m_xScrollLines*m_xScrollPixelsPerLine; - int noPositions = (int) ( ((nMaxWidth - w)/(float)m_xScrollPixelsPerLine) + 0.5 ); - if (noPositions < 0) - noPositions = 0; - - if ( (m_xScrollPosition + nScrollInc) < 0 ) - nScrollInc = -m_xScrollPosition; // As -ve as we can go - else if ( (m_xScrollPosition + nScrollInc) > noPositions ) - nScrollInc = noPositions - m_xScrollPosition; // As +ve as we can go - - return nScrollInc; - } - else - { - int w, h; - GetClientSize(&w, &h); - - int nMaxHeight = m_yScrollLines*m_yScrollPixelsPerLine; - int noPositions = (int) ( ((nMaxHeight - h)/(float)m_yScrollPixelsPerLine) + 0.5 ); - if (noPositions < 0) - noPositions = 0; - - if ( (m_yScrollPosition + nScrollInc) < 0 ) - nScrollInc = -m_yScrollPosition; // As -ve as we can go - else if ( (m_yScrollPosition + nScrollInc) > noPositions ) - nScrollInc = noPositions - m_yScrollPosition; // As +ve as we can go - - return nScrollInc; - } + + return nScrollInc; } // Adjust the scrollbars - new version. -void wxScrolledWindow::AdjustScrollbars(void) +void wxScrolledWindow::AdjustScrollbars() { - int w, h; - GetClientSize(&w, &h); - - // Recalculate scroll bar range and position - if (m_xScrollLines > 0) - { - int nMaxWidth = m_xScrollLines*m_xScrollPixelsPerLine; - int newRange = (int) ( ((nMaxWidth)/(float)m_xScrollPixelsPerLine) + 0.5 ); - if (newRange < 0) - newRange = 0; - - m_xScrollPosition = wxMin(newRange, m_xScrollPosition); - - // Calculate page size i.e. number of scroll units you get on the - // current client window - int noPagePositions = (int) ( (w/(float)m_xScrollPixelsPerLine) + 0.5 ); - if (noPagePositions < 1) - noPagePositions = 1; - - SetScrollbar(wxHORIZONTAL, m_xScrollPosition, noPagePositions, newRange); - SetScrollPageSize(wxHORIZONTAL, noPagePositions); - } - // Robert Roebling - else - { - m_xScrollPosition = 0; - SetScrollbar (wxHORIZONTAL, 0, 0, 0, FALSE); - } - - if (m_yScrollLines > 0) - { - int nMaxHeight = m_yScrollLines*m_yScrollPixelsPerLine; - int newRange = (int) ( ((nMaxHeight)/(float)m_yScrollPixelsPerLine) + 0.5 ); - if (newRange < 0) - newRange = 0; - - m_yScrollPosition = wxMin(newRange, m_yScrollPosition); - - // Calculate page size i.e. number of scroll units you get on the - // current client window - int noPagePositions = (int) ( (h/(float)m_yScrollPixelsPerLine) + 0.5 ); - if (noPagePositions < 1) - noPagePositions = 1; - - SetScrollbar(wxVERTICAL, m_yScrollPosition, noPagePositions, newRange); - SetScrollPageSize(wxVERTICAL, noPagePositions); - } - else - { - m_yScrollPosition = 0; - SetScrollbar (wxVERTICAL, 0, 0, 0, FALSE); // Robert Roebling - } - -} + int w, h; + m_targetWindow->GetClientSize(&w, &h); -// Default OnSize resets scrollbars, if any -void wxScrolledWindow::OnSize(wxSizeEvent& WXUNUSED(event)) -{ -#if wxUSE_CONSTRAINTS - if (GetAutoLayout()) - Layout(); -#endif + int oldXScroll = m_xScrollPosition; + int oldYScroll = m_yScrollPosition; - AdjustScrollbars(); -} + if (m_xScrollLines > 0) + { + // 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 ); + + SetScrollbar(wxHORIZONTAL, m_xScrollPosition, noPagePositions, m_xScrollLines); + // The amount by which we scroll when paging + SetScrollPageSize(wxHORIZONTAL, noPagePositions); + } + else + { + m_xScrollPosition = 0; + SetScrollbar (wxHORIZONTAL, 0, 0, 0, FALSE); + } -// This calls OnDraw, having adjusted the origin according to the current -// scroll position -void wxScrolledWindow::OnPaint(wxPaintEvent& WXUNUSED(event)) -{ - wxPaintDC dc(this); - PrepareDC(dc); + if (m_yScrollLines > 0) + { + // 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 ); + + SetScrollbar(wxVERTICAL, m_yScrollPosition, noPagePositions, m_yScrollLines); + // The amount by which we scroll when paging + SetScrollPageSize(wxVERTICAL, noPagePositions); + } + else + { + m_yScrollPosition = 0; + SetScrollbar (wxVERTICAL, 0, 0, 0, FALSE); + } + + if (oldXScroll != m_xScrollPosition) + { + if (m_xScrollingEnabled) + m_targetWindow->ScrollWindow( m_xScrollPixelsPerLine * (oldXScroll-m_xScrollPosition), 0, (const wxRect *) NULL ); + else + m_targetWindow->Refresh(); + } - OnDraw(dc); + if (oldYScroll != m_yScrollPosition) + { + if (m_yScrollingEnabled) + m_targetWindow->ScrollWindow( 0, m_yScrollPixelsPerLine * (oldYScroll-m_yScrollPosition), (const wxRect *) NULL ); + else + m_targetWindow->Refresh(); + } } // Override this function if you don't want to have wxScrolledWindow // automatically change the origin according to the scroll position. void wxScrolledWindow::PrepareDC(wxDC& dc) { - dc.SetDeviceOrigin(- m_xScrollPosition * m_xScrollPixelsPerLine, - m_yScrollPosition * m_yScrollPixelsPerLine); - dc.SetUserScale(m_scaleX, m_scaleY); + dc.SetDeviceOrigin( -m_xScrollPosition * m_xScrollPixelsPerLine, + -m_yScrollPosition * m_yScrollPixelsPerLine ); + dc.SetUserScale( m_scaleX, m_scaleY ); } #if WXWIN_COMPATIBILITY @@ -365,12 +475,22 @@ void wxScrolledWindow::GetScrollUnitsPerPage (int *x_page, int *y_page) const *x_page = GetScrollPageSize(wxHORIZONTAL); *y_page = GetScrollPageSize(wxVERTICAL); } -#endif + +void wxScrolledWindow::CalcUnscrolledPosition(int x, int y, float *xx, float *yy) const +{ + if ( xx ) + *xx = (float)(x + m_xScrollPosition * m_xScrollPixelsPerLine); + if ( yy ) + *yy = (float)(y + m_yScrollPosition * m_yScrollPixelsPerLine); +} +#endif // WXWIN_COMPATIBILITY void wxScrolledWindow::GetScrollPixelsPerUnit (int *x_unit, int *y_unit) const { - *x_unit = m_xScrollPixelsPerLine; - *y_unit = m_yScrollPixelsPerLine; + if ( x_unit ) + *x_unit = m_xScrollPixelsPerLine; + if ( y_unit ) + *y_unit = m_yScrollPixelsPerLine; } int wxScrolledWindow::GetScrollPageSize(int orient) const @@ -392,58 +512,202 @@ void wxScrolledWindow::SetScrollPageSize(int orient, int pageSize) /* * Scroll to given position (scroll position, not pixel position) */ -void wxScrolledWindow::Scroll (int x_pos, int y_pos) +void wxScrolledWindow::Scroll( int x_pos, int y_pos ) { - int old_x, old_y; - ViewStart (&old_x, &old_y); - if (((x_pos == -1) || (x_pos == old_x)) && ((y_pos == -1) || (y_pos == old_y))) - return; + if (!m_targetWindow) + return; - if (x_pos > -1) + if (((x_pos == -1) || (x_pos == m_xScrollPosition)) && + ((y_pos == -1) || (y_pos == m_yScrollPosition))) return; + + int w, h; + m_targetWindow->GetClientSize(&w, &h); + + if ((x_pos != -1) && (m_xScrollPixelsPerLine)) { - m_xScrollPosition = x_pos; - SetScrollPos (wxHORIZONTAL, x_pos, TRUE); + int old_x = m_xScrollPosition; + 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) + if ((y_pos != -1) && (m_yScrollPixelsPerLine)) { - m_yScrollPosition = y_pos; - SetScrollPos (wxVERTICAL, y_pos, TRUE); + 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 ); + } } - Refresh(); -#ifdef __WXMSW__ - ::UpdateWindow ((HWND) GetHWND()); + +#ifdef __WXMAC__ + m_targetWindow->MacUpdateImmediately(); #endif } void wxScrolledWindow::EnableScrolling (bool x_scroll, bool y_scroll) { - m_xScrollingEnabled = x_scroll; - m_yScrollingEnabled = y_scroll; + m_xScrollingEnabled = x_scroll; + m_yScrollingEnabled = y_scroll; } void wxScrolledWindow::GetVirtualSize (int *x, int *y) const { - *x = m_xScrollPixelsPerLine * m_xScrollLines; - *y = m_yScrollPixelsPerLine * m_yScrollLines; + if ( x ) + *x = m_xScrollPixelsPerLine * m_xScrollLines; + if ( y ) + *y = m_yScrollPixelsPerLine * m_yScrollLines; } // Where the current view starts from -void wxScrolledWindow::ViewStart (int *x, int *y) const +void wxScrolledWindow::GetViewStart (int *x, int *y) const { - *x = m_xScrollPosition; - *y = m_yScrollPosition; + if ( x ) + *x = m_xScrollPosition; + if ( y ) + *y = m_yScrollPosition; } void wxScrolledWindow::CalcScrolledPosition(int x, int y, int *xx, int *yy) const { - *xx = x - m_xScrollPosition * m_xScrollPixelsPerLine; - *yy = y - m_yScrollPosition * m_yScrollPixelsPerLine; + if ( xx ) + *xx = x - m_xScrollPosition * m_xScrollPixelsPerLine; + if ( yy ) + *yy = y - m_yScrollPosition * m_yScrollPixelsPerLine; } -void wxScrolledWindow::CalcUnscrolledPosition(int x, int y, float *xx, float *yy) const +void wxScrolledWindow::CalcUnscrolledPosition(int x, int y, int *xx, int *yy) const { - *xx = (float)(x + m_xScrollPosition * m_xScrollPixelsPerLine); - *yy = (float)(y + m_yScrollPosition * m_yScrollPixelsPerLine); + 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 wxScrolledWindow::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 wxScrolledWindow::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 wxScrolledWindow::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(); + } +}