/////////////////////////////////////////////////////////////////////////////
-// Name: src/generic/scrolwin.cpp
+// Name: src/generic/scrlwing.cpp
// Purpose: wxScrolledWindow implementation
// Author: Julian Smart
// Modified by: Vadim Zeitlin on 31.08.00: wxScrollHelper allows to implement.
// headers
// ----------------------------------------------------------------------------
-#ifdef __VMS
-#define XtDisplay XTDISPLAY
-#endif
-
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#pragma hdrstop
#endif
+#ifdef __VMS
+#define XtDisplay XTDISPLAY
+#endif
+
#include "wx/scrolwin.h"
#ifndef WX_PRECOMP
#include "wx/utils.h"
+ #include "wx/panel.h"
+ #include "wx/dcclient.h"
+ #if wxUSE_TIMER
+ #include "wx/timer.h"
+ #endif
+ #include "wx/sizer.h"
#endif
-#include "wx/dcclient.h"
-
-#include "wx/panel.h"
-#if wxUSE_TIMER
-#include "wx/timer.h"
+#ifdef __WXMAC__
+#include "wx/scrolbar.h"
#endif
-#include "wx/sizer.h"
+
#include "wx/recguard.h"
#ifdef __WXMSW__
}
}
- // reset the skipped flag to false as it might have been set to true in
- // ProcessEvent() above
- event.Skip(false);
-
if ( evType == wxEVT_PAINT )
{
m_scrollHelper->HandleOnPaint((wxPaintEvent &)event);
return true;
}
+ // reset the skipped flag (which might have been set to true in
+ // ProcessEvent() above) to be able to test it below
+ bool wasSkipped = event.GetSkipped();
+ if ( wasSkipped )
+ event.Skip(false);
+
if ( evType == wxEVT_SCROLLWIN_TOP ||
evType == wxEVT_SCROLLWIN_BOTTOM ||
evType == wxEVT_SCROLLWIN_LINEUP ||
evType == wxEVT_SCROLLWIN_THUMBTRACK ||
evType == wxEVT_SCROLLWIN_THUMBRELEASE )
{
- m_scrollHelper->HandleOnScroll((wxScrollWinEvent &)event);
- return !event.GetSkipped();
+ m_scrollHelper->HandleOnScroll((wxScrollWinEvent &)event);
+ if ( !event.GetSkipped() )
+ {
+ // it makes sense to indicate that we processed the message as we
+ // did scroll the window (and also notice that wxAutoScrollTimer
+ // relies on our return value to stop scrolling when we are at top
+ // or bottom already)
+ processed = true;
+ wasSkipped = false;
+ }
}
if ( evType == wxEVT_ENTER_WINDOW )
m_scrollHelper->HandleOnMouseLeave((wxMouseEvent &)event);
}
#if wxUSE_MOUSEWHEEL
+ // Use GTK's own scroll wheel handling in GtkScrolledWindow
+#ifndef __WXGTK20__
else if ( evType == wxEVT_MOUSEWHEEL )
{
m_scrollHelper->HandleOnMouseWheel((wxMouseEvent &)event);
+ return true;
}
+#endif
#endif // wxUSE_MOUSEWHEEL
else if ( evType == wxEVT_CHAR )
{
m_scrollHelper->HandleOnChar((wxKeyEvent &)event);
- return !event.GetSkipped();
+ if ( !event.GetSkipped() )
+ {
+ processed = true;
+ wasSkipped = false;
+ }
}
- return false;
+ if ( processed )
+ event.Skip(wasSkipped);
+
+ return processed;
}
// ----------------------------------------------------------------------------
m_handler = NULL;
m_win = win;
+
+ m_win->SetScrollHelper( this );
// by default, the associated window is also the target window
DoSetTargetWindow(win);
return;
}
- int orient = event.GetOrientation();
- if (orient == wxHORIZONTAL)
- {
- m_xScrollPosition += nScrollInc;
- m_win->SetScrollPos(wxHORIZONTAL, m_xScrollPosition);
- }
- else
- {
- m_yScrollPosition += nScrollInc;
- m_win->SetScrollPos(wxVERTICAL, m_yScrollPosition);
- }
-
bool needsRefresh = false;
int dx = 0,
dy = 0;
+ int orient = event.GetOrientation();
if (orient == wxHORIZONTAL)
{
if ( m_xScrollingEnabled )
}
}
+ if ( !needsRefresh )
+ {
+ // flush all pending repaints before we change m_{x,y}ScrollPosition, as
+ // otherwise invalidated area could be updated incorrectly later when
+ // ScrollWindow() makes sure they're repainted before scrolling them
+#ifdef __WXMAC__
+ // wxWindowMac is taking care of making sure the update area is correctly
+ // set up, while not forcing an immediate redraw
+#else
+ m_targetWindow->Update();
+#endif
+ }
+
+ if (orient == wxHORIZONTAL)
+ {
+ m_xScrollPosition += nScrollInc;
+ m_win->SetScrollPos(wxHORIZONTAL, m_xScrollPosition);
+ }
+ else
+ {
+ m_yScrollPosition += nScrollInc;
+ m_win->SetScrollPos(wxVERTICAL, m_yScrollPosition);
+ }
+
if ( needsRefresh )
{
m_targetWindow->Refresh(true, GetScrollRect());
if (orient == wxHORIZONTAL)
{
- if (m_xScrollPixelsPerLine > 0)
+ if ( m_xScrollPosition + nScrollInc < 0 )
{
- if ( m_xScrollPosition + nScrollInc < 0 )
- {
- // As -ve as we can go
- nScrollInc = -m_xScrollPosition;
- }
- else // check for the other bound
+ // As -ve as we can go
+ nScrollInc = -m_xScrollPosition;
+ }
+ else // check for the other bound
+ {
+ const int posMax = m_xScrollLines - m_xScrollLinesPerPage;
+ if ( m_xScrollPosition + nScrollInc > posMax )
{
- const int posMax = m_xScrollLines - m_xScrollLinesPerPage;
- if ( m_xScrollPosition + nScrollInc > posMax )
- {
- // As +ve as we can go
- nScrollInc = posMax - m_xScrollPosition;
- }
+ // As +ve as we can go
+ nScrollInc = posMax - m_xScrollPosition;
}
}
- else
- m_targetWindow->Refresh(true, GetScrollRect());
}
- else
+ else // wxVERTICAL
{
- if ( m_yScrollPixelsPerLine > 0 )
+ if ( m_yScrollPosition + nScrollInc < 0 )
{
- if ( m_yScrollPosition + nScrollInc < 0 )
- {
- // As -ve as we can go
- nScrollInc = -m_yScrollPosition;
- }
- else // check for the other bound
- {
- const int posMax = m_yScrollLines - m_yScrollLinesPerPage;
- if ( m_yScrollPosition + nScrollInc > posMax )
- {
- // As +ve as we can go
- nScrollInc = posMax - m_yScrollPosition;
- }
- }
+ // As -ve as we can go
+ nScrollInc = -m_yScrollPosition;
}
- else
+ else // check for the other bound
{
- // VZ: why do we do this? (FIXME)
- m_targetWindow->Refresh(true, GetScrollRect());
+ const int posMax = m_yScrollLines - m_yScrollLinesPerPage;
+ if ( m_yScrollPosition + nScrollInc > posMax )
+ {
+ // As +ve as we can go
+ nScrollInc = posMax - m_yScrollPosition;
+ }
}
}
void wxScrollHelper::DoPrepareDC(wxDC& dc)
{
wxPoint pt = dc.GetDeviceOrigin();
- dc.SetDeviceOrigin( pt.x - m_xScrollPosition * m_xScrollPixelsPerLine,
- pt.y - m_yScrollPosition * m_yScrollPixelsPerLine );
+#ifdef __WXGTK__
+ // It may actually be correct to always query
+ // the m_sign from the DC here, but I leve the
+ // #ifdef GTK for now.
+ if (m_win->GetLayoutDirection() == wxLayout_RightToLeft)
+ dc.SetDeviceOrigin( pt.x + m_xScrollPosition * m_xScrollPixelsPerLine,
+ pt.y - m_yScrollPosition * m_yScrollPixelsPerLine );
+ else
+#endif
+ dc.SetDeviceOrigin( pt.x - m_xScrollPosition * m_xScrollPixelsPerLine,
+ pt.y - m_yScrollPosition * m_yScrollPixelsPerLine );
dc.SetUserScale( m_scaleX, m_scaleY );
}
*y_unit = m_yScrollPixelsPerLine;
}
+
+int wxScrollHelper::GetScrollLines( int orient ) const
+{
+ if ( orient == wxHORIZONTAL )
+ return m_xScrollLines;
+ else
+ return m_yScrollLines;
+}
+
int wxScrollHelper::GetScrollPageSize(int orient) const
{
if ( orient == wxHORIZONTAL )
int w = 0, h = 0;
GetTargetSize(&w, &h);
+ // compute new position:
+ int new_x = m_xScrollPosition;
+ int new_y = m_yScrollPosition;
+
if ((x_pos != -1) && (m_xScrollPixelsPerLine))
{
- int old_x = m_xScrollPosition;
- m_xScrollPosition = x_pos;
+ new_x = 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 );
+ int noPagePositions = w/m_xScrollPixelsPerLine;
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_win->SetScrollPos( wxHORIZONTAL, m_xScrollPosition );
- m_targetWindow->ScrollWindow( (old_x-m_xScrollPosition)*m_xScrollPixelsPerLine, 0,
- GetScrollRect() );
- }
+ new_x = wxMin( m_xScrollLines-noPagePositions, new_x );
+ new_x = wxMax( 0, new_x );
}
if ((y_pos != -1) && (m_yScrollPixelsPerLine))
{
- int old_y = m_yScrollPosition;
- m_yScrollPosition = y_pos;
+ new_y = 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 );
+ int noPagePositions = h/m_yScrollPixelsPerLine;
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 );
+ new_y = wxMin( m_yScrollLines-noPagePositions, new_y );
+ new_y = wxMax( 0, new_y );
+ }
- if (old_y != m_yScrollPosition) {
- m_win->SetScrollPos( wxVERTICAL, m_yScrollPosition );
- m_targetWindow->ScrollWindow( 0, (old_y-m_yScrollPosition)*m_yScrollPixelsPerLine,
- GetScrollRect() );
- }
+ if ( new_x == m_xScrollPosition && new_y == m_yScrollPosition )
+ return; // nothing to do, the position didn't change
+
+ // flush all pending repaints before we change m_{x,y}ScrollPosition, as
+ // otherwise invalidated area could be updated incorrectly later when
+ // ScrollWindow() makes sure they're repainted before scrolling them
+ m_targetWindow->Update();
+
+ // update the position and scroll the window now:
+ if (m_xScrollPosition != new_x)
+ {
+ int old_x = m_xScrollPosition;
+ m_xScrollPosition = new_x;
+ m_win->SetScrollPos( wxHORIZONTAL, new_x );
+ m_targetWindow->ScrollWindow( (old_x-new_x)*m_xScrollPixelsPerLine, 0,
+ GetScrollRect() );
+ }
+
+ if (m_yScrollPosition != new_y)
+ {
+ int old_y = m_yScrollPosition;
+ m_yScrollPosition = new_y;
+ m_win->SetScrollPos( wxVERTICAL, new_y );
+ m_targetWindow->ScrollWindow( 0, (old_y-new_y)*m_yScrollPixelsPerLine,
+ GetScrollRect() );
}
}
if ( m_xScrollPosition != xScrollOld )
{
- wxScrollWinEvent event(wxEVT_SCROLLWIN_THUMBTRACK, m_xScrollPosition,
+ wxScrollWinEvent evt(wxEVT_SCROLLWIN_THUMBTRACK, m_xScrollPosition,
wxHORIZONTAL);
- event.SetEventObject(m_win);
- m_win->GetEventHandler()->ProcessEvent(event);
+ evt.SetEventObject(m_win);
+ m_win->GetEventHandler()->ProcessEvent(evt);
}
if ( m_yScrollPosition != yScrollOld )
{
- wxScrollWinEvent event(wxEVT_SCROLLWIN_THUMBTRACK, m_yScrollPosition,
+ wxScrollWinEvent evt(wxEVT_SCROLLWIN_THUMBTRACK, m_yScrollPosition,
wxVERTICAL);
- event.SetEventObject(m_win);
- m_win->GetEventHandler()->ProcessEvent(event);
+ evt.SetEventObject(m_win);
+ m_win->GetEventHandler()->ProcessEvent(evt);
}
}
wxScrollWinEvent newEvent;
newEvent.SetPosition(0);
- newEvent.SetOrientation(wxVERTICAL);
+ newEvent.SetOrientation( event.GetWheelAxis() == 0 ? wxVERTICAL : wxHORIZONTAL);
newEvent.SetEventObject(m_win);
if (event.IsPageScroll())
MacSetClipChildren( true ) ;
#endif
- bool ok = wxPanel::Create(parent, id, pos, size, style|wxHSCROLL|wxVSCROLL, name);
+ // by default, we're scrollable in both directions (but if one of the
+ // styles is specified explicitly, we shouldn't add the other one
+ // automatically)
+ if ( !(style & (wxHSCROLL | wxVSCROLL)) )
+ style |= wxHSCROLL | wxVSCROLL;
+
+ bool ok = wxPanel::Create(parent, id, pos, size, style, name);
return ok;
}
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