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wxWidgets/src/gtk/scrolwin.cpp
Ron Lee 12a3f2275c Deprecated wxSizer::Remove( wxWindow* ), s/Remove/Detach/ in most places. 
Made wxSizer child list typesafe.  I've not added the wxList implicit
conversion kludge yet, let's see who complains first perhaps..

Deprecated wxSizer::{G,S}etOption in favour of {G,S}etProportion in line
with the parameter name change in the docs.

Added {G,S}etSpacer consistent with the accessors for windows/sizers.

Made all wxSizer index parameters size_t -- we support no sensible
interpretation for negative indexes in them.  Hopefully this will
cause no real problems, but code doing (eg. Remove( 0 )) will need
to change to use 0u to resolve the ambiguity with overloaded members.
This is probably a Good Thing though, ymmv.

s/FALSE/false/g ; s/TRUE/true/g ; s/wxASSERT/wxASSERT_MSG/g in sizer.{cpp,h}

Fixed (I hope) the brokenness in wxSizer::Show -- I have no code to test
this yet, so it's a blind change, but spacers should now be hidden correctly
instead of ignored, and it should be properly reversable over multiple
calls now too.

removed pointless private scoping around DECLARE_CLASS macros.

Replace 0's I added previously with NULL -- not like that will end the
email thread either..

Added Add( wxSizerItem * ) & co.  There are probably a couple of other
places we can usefully do something like this too.  Stopped short of
refactoring everything to raise some issues about sizer method recursion
on -dev.

Updated wxSizer docs some more, they are still incomplete but getting
better.

wrapped KeyCode in wxDEPRECATED, converted all (gtk build) instances
to GetKeyCode.  There may be a few left for other ports.

Fixed a couple of other random compile warnings along the way.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@18616 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
2003-01-07 10:22:07 +00:00

962 lines
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/////////////////////////////////////////////////////////////////////////////
// Name: gtk/scrolwin.cpp
// Purpose: wxScrolledWindow implementation
// Author: Julian Smart
// Modified by: Ron Lee
// Created: 01/02/97
// RCS-ID: $Id$
// Copyright: (c) Julian Smart and Markus Holzem
// Licence: wxWindows license
/////////////////////////////////////////////////////////////////////////////
// ============================================================================
// declarations
// ============================================================================
// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------
#ifdef __GNUG__
#pragma implementation "scrolwin.h"
#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/scrolwin.h"
#include "wx/panel.h"
#include "wx/sizer.h"
#include "wx/gtk/private.h"
#include "wx/gtk/win_gtk.h"
// ----------------------------------------------------------------------------
// event tables
// ----------------------------------------------------------------------------
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, wxPanel)
// ============================================================================
// implementation
// ============================================================================
//-----------------------------------------------------------------------------
// data
//-----------------------------------------------------------------------------
extern bool g_blockEventsOnDrag;
extern bool g_blockEventsOnScroll;
//-----------------------------------------------------------------------------
// idle system
//-----------------------------------------------------------------------------
extern void wxapp_install_idle_handler();
extern bool g_isIdle;
//-----------------------------------------------------------------------------
// "value_changed" from m_vAdjust
//-----------------------------------------------------------------------------
static void gtk_scrolled_window_vscroll_callback( GtkAdjustment *adjust,
SCROLLBAR_CBACK_ARG
wxScrolledWindow *win )
{
if (g_isIdle)
wxapp_install_idle_handler();
if (g_blockEventsOnDrag) return;
if (!win->m_hasVMT) return;
win->GtkVScroll( adjust->value,
GET_SCROLL_TYPE(GTK_SCROLLED_WINDOW(win->m_widget)->vscrollbar) );
}
//-----------------------------------------------------------------------------
// "value_changed" from m_hAdjust
//-----------------------------------------------------------------------------
static void gtk_scrolled_window_hscroll_callback( GtkAdjustment *adjust,
SCROLLBAR_CBACK_ARG
wxScrolledWindow *win )
{
if (g_isIdle)
wxapp_install_idle_handler();
if (g_blockEventsOnDrag) return;
if (!win->m_hasVMT) return;
win->GtkHScroll( adjust->value,
GET_SCROLL_TYPE(GTK_SCROLLED_WINDOW(win->m_widget)->hscrollbar) );
}
//-----------------------------------------------------------------------------
// "button_press_event" from scrollbar
//-----------------------------------------------------------------------------
static gint gtk_scrollbar_button_press_callback( GtkRange *widget,
GdkEventButton *gdk_event,
wxWindowGTK *win)
{
if (g_isIdle)
wxapp_install_idle_handler();
g_blockEventsOnScroll = TRUE;
// FIXME: there is no slider field any more, what was meant here?
#ifndef __WXGTK20__
win->m_isScrolling = (gdk_event->window == widget->slider);
#endif
return FALSE;
}
//-----------------------------------------------------------------------------
// "button_release_event" from scrollbar
//-----------------------------------------------------------------------------
static gint gtk_scrollbar_button_release_callback( GtkRange *widget,
GdkEventButton *WXUNUSED(gdk_event),
wxWindowGTK *win)
{
// don't test here as we can release the mouse while being over
// a different window than the slider
//
// if (gdk_event->window != widget->slider) return FALSE;
g_blockEventsOnScroll = FALSE;
if (win->m_isScrolling)
{
wxEventType command = wxEVT_SCROLLWIN_THUMBRELEASE;
int value = -1;
int dir = -1;
GtkScrolledWindow *scrolledWindow = GTK_SCROLLED_WINDOW(win->m_widget);
if (widget == GTK_RANGE(scrolledWindow->hscrollbar))
{
value = (int)(win->m_hAdjust->value+0.5);
dir = wxHORIZONTAL;
}
if (widget == GTK_RANGE(scrolledWindow->vscrollbar))
{
value = (int)(win->m_vAdjust->value+0.5);
dir = wxVERTICAL;
}
wxScrollWinEvent event( command, value, dir );
event.SetEventObject( win );
win->GetEventHandler()->ProcessEvent( event );
}
win->m_isScrolling = FALSE;
return FALSE;
}
//-----------------------------------------------------------------------------
// InsertChild for wxScrolledWindow
//-----------------------------------------------------------------------------
static void wxInsertChildInScrolledWindow( wxWindow* parent, wxWindow* child )
{
// The window might have been scrolled already, do we
// have to adapt the position.
GtkPizza *pizza = GTK_PIZZA(parent->m_wxwindow);
child->m_x += pizza->xoffset;
child->m_y += pizza->yoffset;
gtk_pizza_put( GTK_PIZZA(parent->m_wxwindow),
GTK_WIDGET(child->m_widget),
child->m_x,
child->m_y,
child->m_width,
child->m_height );
}
// ----------------------------------------------------------------------------
// wxScrolledWindow creation
// ----------------------------------------------------------------------------
void wxScrolledWindow::Init()
{
m_xScrollPixelsPerLine = 0;
m_yScrollPixelsPerLine = 0;
m_xScrollingEnabled = TRUE;
m_yScrollingEnabled = TRUE;
m_xScrollPosition = 0;
m_yScrollPosition = 0;
m_xScrollLinesPerPage = 0;
m_yScrollLinesPerPage = 0;
m_targetWindow = (wxWindow*) NULL;
m_scaleX = 1.0;
m_scaleY = 1.0;
m_hasScrolling = TRUE;
}
bool wxScrolledWindow::Create(wxWindow *parent,
wxWindowID id,
const wxPoint& pos,
const wxSize& size,
long style,
const wxString& name)
{
Init();
if (!PreCreation( parent, pos, size ) ||
!CreateBase( parent, id, pos, size, style, wxDefaultValidator, name ))
{
wxFAIL_MSG( wxT("wxWindow creation failed") );
return FALSE;
}
m_insertCallback = wxInsertChildInScrolledWindow;
m_targetWindow = this;
m_widget = gtk_scrolled_window_new( (GtkAdjustment *) NULL, (GtkAdjustment *) NULL );
GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_FOCUS );
GtkScrolledWindow *scrolledWindow = GTK_SCROLLED_WINDOW(m_widget);
GtkScrolledWindowClass *scroll_class = GTK_SCROLLED_WINDOW_CLASS( GTK_OBJECT_GET_CLASS(m_widget) );
scroll_class->scrollbar_spacing = 0;
gtk_scrolled_window_set_policy( scrolledWindow, GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC );
m_hAdjust = gtk_range_get_adjustment( GTK_RANGE(scrolledWindow->hscrollbar) );
m_vAdjust = gtk_range_get_adjustment( GTK_RANGE(scrolledWindow->vscrollbar) );
m_wxwindow = gtk_pizza_new();
gtk_container_add( GTK_CONTAINER(m_widget), m_wxwindow );
GtkPizza *pizza = GTK_PIZZA(m_wxwindow);
if (HasFlag(wxRAISED_BORDER))
{
gtk_pizza_set_shadow_type( pizza, GTK_MYSHADOW_OUT );
}
else if (HasFlag(wxSUNKEN_BORDER))
{
gtk_pizza_set_shadow_type( pizza, GTK_MYSHADOW_IN );
}
else if (HasFlag(wxSIMPLE_BORDER))
{
gtk_pizza_set_shadow_type( pizza, GTK_MYSHADOW_THIN );
}
else
{
gtk_pizza_set_shadow_type( pizza, GTK_MYSHADOW_NONE );
}
GTK_WIDGET_SET_FLAGS( m_wxwindow, GTK_CAN_FOCUS );
m_acceptsFocus = TRUE;
// I _really_ don't want scrollbars in the beginning
m_vAdjust->lower = 0.0;
m_vAdjust->upper = 1.0;
m_vAdjust->value = 0.0;
m_vAdjust->step_increment = 1.0;
m_vAdjust->page_increment = 2.0;
gtk_signal_emit_by_name( GTK_OBJECT(m_vAdjust), "changed" );
m_hAdjust->lower = 0.0;
m_hAdjust->upper = 1.0;
m_hAdjust->value = 0.0;
m_hAdjust->step_increment = 1.0;
m_hAdjust->page_increment = 2.0;
gtk_signal_emit_by_name( GTK_OBJECT(m_hAdjust), "changed" );
// Handlers for new scrollbar values
GtkVConnectEvent();
GtkHConnectEvent();
// these handlers block mouse events to any window during scrolling such as
// motion events and prevent GTK and wxWindows from fighting over where the
// slider should be
gtk_signal_connect( GTK_OBJECT(scrolledWindow->vscrollbar), "button_press_event",
(GtkSignalFunc)gtk_scrollbar_button_press_callback, (gpointer) this );
gtk_signal_connect( GTK_OBJECT(scrolledWindow->hscrollbar), "button_press_event",
(GtkSignalFunc)gtk_scrollbar_button_press_callback, (gpointer) this );
gtk_signal_connect( GTK_OBJECT(scrolledWindow->vscrollbar), "button_release_event",
(GtkSignalFunc)gtk_scrollbar_button_release_callback, (gpointer) this );
gtk_signal_connect( GTK_OBJECT(scrolledWindow->hscrollbar), "button_release_event",
(GtkSignalFunc)gtk_scrollbar_button_release_callback, (gpointer) this );
gtk_widget_show( m_wxwindow );
if (m_parent)
m_parent->DoAddChild( this );
m_focusWidget = m_wxwindow;
PostCreation();
Show( TRUE );
return TRUE;
}
// ----------------------------------------------------------------------------
// setting scrolling parameters
// ----------------------------------------------------------------------------
void wxScrolledWindow::DoSetVirtualSize( int x, int y )
{
wxPanel::DoSetVirtualSize( x, y );
AdjustScrollbars();
#if wxUSE_CONSTRAINTS
if (GetAutoLayout())
Layout();
#endif
}
/*
* 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 old_x = m_xScrollPixelsPerLine * m_xScrollPosition;
int old_y = m_yScrollPixelsPerLine * m_yScrollPosition;
m_xScrollPixelsPerLine = pixelsPerUnitX;
m_yScrollPixelsPerLine = pixelsPerUnitY;
m_hAdjust->value = m_xScrollPosition = xPos;
m_vAdjust->value = m_yScrollPosition = yPos;
// Setting hints here should arguably be deprecated, but without it
// a sizer might override this manual scrollbar setting in old code.
m_targetWindow->SetVirtualSizeHints( noUnitsX * pixelsPerUnitX, noUnitsY * pixelsPerUnitY );
m_targetWindow->SetVirtualSize( noUnitsX * pixelsPerUnitX, noUnitsY * pixelsPerUnitY );
if (!noRefresh)
{
int new_x = m_xScrollPixelsPerLine * m_xScrollPosition;
int new_y = m_yScrollPixelsPerLine * m_yScrollPosition;
m_targetWindow->ScrollWindow( old_x - new_x, old_y - new_y );
}
}
void wxScrolledWindow::AdjustScrollbars()
{
int w, h;
int vw, vh;
m_targetWindow->GetClientSize( &w, &h );
m_targetWindow->GetVirtualSize( &vw, &vh );
if (m_xScrollPixelsPerLine == 0)
{
m_hAdjust->upper = 1.0;
m_hAdjust->page_size = 1.0;
}
else
{
m_hAdjust->upper = vw / m_xScrollPixelsPerLine;
m_hAdjust->page_size = (w / m_xScrollPixelsPerLine);
// If the scrollbar hits the right side, move the window
// right to keep it from over extending.
if ((m_hAdjust->value != 0.0) && (m_hAdjust->value + m_hAdjust->page_size > m_hAdjust->upper))
{
m_hAdjust->value = m_hAdjust->upper - m_hAdjust->page_size;
if (m_hAdjust->value < 0.0)
m_hAdjust->value = 0.0;
if (GetChildren().GetCount() == 0)
m_xScrollPosition = (int)m_hAdjust->value; // This is enough without child windows
else
gtk_signal_emit_by_name( GTK_OBJECT(m_hAdjust), "value_changed" ); // Actually scroll window
}
}
if (m_yScrollPixelsPerLine == 0)
{
m_vAdjust->upper = 1.0;
m_vAdjust->page_size = 1.0;
}
else
{
m_vAdjust->upper = vh / m_yScrollPixelsPerLine;
m_vAdjust->page_size = (h / m_yScrollPixelsPerLine);
if ((m_vAdjust->value != 0.0) && (m_vAdjust->value + m_vAdjust->page_size > m_vAdjust->upper))
{
m_vAdjust->value = m_vAdjust->upper - m_vAdjust->page_size;
if (m_vAdjust->value < 0.0)
m_vAdjust->value = 0.0;
if (GetChildren().GetCount() == 0)
m_yScrollPosition = (int)m_vAdjust->value;
else
gtk_signal_emit_by_name( GTK_OBJECT(m_vAdjust), "value_changed" );
}
}
m_xScrollLinesPerPage = (int)(m_hAdjust->page_size + 0.5);
m_yScrollLinesPerPage = (int)(m_vAdjust->page_size + 0.5);
gtk_signal_emit_by_name( GTK_OBJECT(m_vAdjust), "changed" );
gtk_signal_emit_by_name( GTK_OBJECT(m_hAdjust), "changed" );
}
// ----------------------------------------------------------------------------
// target window handling
// ----------------------------------------------------------------------------
void wxScrolledWindow::SetTargetWindow( wxWindow *target, bool WXUNUSED(pushEventHandler) )
{
wxASSERT_MSG( target, wxT("target window must not be NULL") );
m_targetWindow = target;
}
wxWindow *wxScrolledWindow::GetTargetWindow()
{
return m_targetWindow;
}
// 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 );
}
void wxScrolledWindow::SetScrollRate( int xstep, int ystep )
{
int old_x = m_xScrollPixelsPerLine * m_xScrollPosition;
int old_y = m_yScrollPixelsPerLine * m_yScrollPosition;
m_xScrollPixelsPerLine = xstep;
m_yScrollPixelsPerLine = ystep;
int new_x = m_xScrollPixelsPerLine * m_xScrollPosition;
int new_y = m_yScrollPixelsPerLine * m_yScrollPosition;
m_targetWindow->ScrollWindow( old_x - new_x, old_y - new_y );
AdjustScrollbars();
}
void wxScrolledWindow::GetScrollPixelsPerUnit (int *x_unit, int *y_unit) const
{
if ( x_unit )
*x_unit = m_xScrollPixelsPerLine;
if ( y_unit )
*y_unit = m_yScrollPixelsPerLine;
}
int wxScrolledWindow::GetScrollPageSize(int orient) const
{
if ( orient == wxHORIZONTAL )
return m_xScrollLinesPerPage;
else
return m_yScrollLinesPerPage;
}
void wxScrolledWindow::SetScrollPageSize(int orient, int pageSize)
{
if ( orient == wxHORIZONTAL )
m_xScrollLinesPerPage = pageSize;
else
m_yScrollLinesPerPage = pageSize;
}
void wxScrolledWindow::OnScroll(wxScrollWinEvent& event)
{
int orient = event.GetOrientation();
int nScrollInc = CalcScrollInc(event);
if (nScrollInc == 0) return;
if (orient == wxHORIZONTAL)
{
int newPos = m_xScrollPosition + nScrollInc;
SetScrollPos(wxHORIZONTAL, newPos, TRUE );
}
else
{
int newPos = m_yScrollPosition + nScrollInc;
SetScrollPos(wxVERTICAL, newPos, TRUE );
}
if (orient == wxHORIZONTAL)
{
m_xScrollPosition += nScrollInc;
}
else
{
m_yScrollPosition += nScrollInc;
}
if (orient == wxHORIZONTAL)
{
if (m_xScrollingEnabled)
m_targetWindow->ScrollWindow(-m_xScrollPixelsPerLine * nScrollInc, 0, (const wxRect *) NULL);
else
m_targetWindow->Refresh();
}
else
{
if (m_yScrollingEnabled)
m_targetWindow->ScrollWindow(0, -m_yScrollPixelsPerLine * nScrollInc, (const wxRect *) NULL);
else
m_targetWindow->Refresh();
}
}
void wxScrolledWindow::Scroll( int x_pos, int y_pos )
{
wxASSERT_MSG( m_targetWindow != 0, _T("No target window") );
if (((x_pos == -1) || (x_pos == m_xScrollPosition)) &&
((y_pos == -1) || (y_pos == m_yScrollPosition))) return;
if ((x_pos != -1) && (m_xScrollPixelsPerLine))
{
int max = (int)(m_hAdjust->upper - m_hAdjust->page_size + 0.5);
if (max < 0) max = 0;
if (x_pos > max) x_pos = max;
if (x_pos < 0) x_pos = 0;
int old_x = m_xScrollPosition;
m_xScrollPosition = x_pos;
m_hAdjust->value = x_pos;
m_targetWindow->ScrollWindow( (old_x-m_xScrollPosition)*m_xScrollPixelsPerLine, 0 );
// Just update the scrollbar, don't send any wxWindows event
GtkHDisconnectEvent();
gtk_signal_emit_by_name( GTK_OBJECT(m_hAdjust), "value_changed" );
GtkHConnectEvent();
}
if ((y_pos != -1) && (m_yScrollPixelsPerLine))
{
int max = (int)(m_vAdjust->upper - m_vAdjust->page_size + 0.5);
if (max < 0) max = 0;
if (y_pos > max) y_pos = max;
if (y_pos < 0) y_pos = 0;
int old_y = m_yScrollPosition;
m_yScrollPosition = y_pos;
m_vAdjust->value = y_pos;
m_targetWindow->ScrollWindow( 0, (old_y-m_yScrollPosition)*m_yScrollPixelsPerLine );
// Just update the scrollbar, don't send any wxWindows event
GtkVDisconnectEvent();
gtk_signal_emit_by_name( GTK_OBJECT(m_vAdjust), "value_changed" );
GtkVConnectEvent();
}
}
// TODO: [VH]Scroll functions should be combined
void wxScrolledWindow::GtkVScroll( float value, unsigned int scroll_type )
{
wxASSERT_MSG( m_targetWindow != 0, _T("No target window") );
if (m_yScrollPixelsPerLine == 0)
return;
int y_pos = (int)(value+0.5);
if (y_pos == m_yScrollPosition)
return;
wxEventType command = GtkScrollWinTypeToWx(scroll_type);
wxScrollWinEvent event( command, y_pos, wxVERTICAL );
event.SetEventObject( this );
GetEventHandler()->ProcessEvent( event );
}
void wxScrolledWindow::GtkHScroll( float value, unsigned int scroll_type )
{
wxASSERT_MSG( m_targetWindow != 0, _T("No target window") );
if (m_xScrollPixelsPerLine == 0)
return;
int x_pos = (int)(value+0.5);
if (x_pos == m_xScrollPosition)
return;
wxEventType command = GtkScrollWinTypeToWx(scroll_type);
wxScrollWinEvent event( command, x_pos, wxHORIZONTAL );
event.SetEventObject( this );
GetEventHandler()->ProcessEvent( event );
}
void wxScrolledWindow::EnableScrolling (bool x_scroll, bool y_scroll)
{
m_xScrollingEnabled = x_scroll;
m_yScrollingEnabled = y_scroll;
}
// Where the current view starts from
void wxScrolledWindow::GetViewStart (int *x, int *y) const
{
if ( x )
*x = m_xScrollPosition;
if ( y )
*y = m_yScrollPosition;
}
void wxScrolledWindow::DoCalcScrolledPosition(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 wxScrolledWindow::DoCalcUnscrolledPosition(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;
}
int wxScrolledWindow::CalcScrollInc(wxScrollWinEvent& event)
{
int pos = event.GetPosition();
int orient = event.GetOrientation();
int nScrollInc = 0;
if (event.GetEventType() == wxEVT_SCROLLWIN_TOP)
{
if (orient == wxHORIZONTAL)
nScrollInc = - m_xScrollPosition;
else
nScrollInc = - m_yScrollPosition;
} else
if (event.GetEventType() == wxEVT_SCROLLWIN_BOTTOM)
{
if (orient == wxHORIZONTAL)
nScrollInc = GetVirtualSize().GetWidth() / m_xScrollPixelsPerLine - m_xScrollPosition;
else
nScrollInc = GetVirtualSize().GetHeight() / m_yScrollPixelsPerLine - m_yScrollPosition;
} else
if (event.GetEventType() == wxEVT_SCROLLWIN_LINEUP)
{
nScrollInc = -1;
} else
if (event.GetEventType() == wxEVT_SCROLLWIN_LINEDOWN)
{
nScrollInc = 1;
} else
if (event.GetEventType() == wxEVT_SCROLLWIN_PAGEUP)
{
if (orient == wxHORIZONTAL)
nScrollInc = -GetScrollPageSize(wxHORIZONTAL);
else
nScrollInc = -GetScrollPageSize(wxVERTICAL);
} else
if (event.GetEventType() == wxEVT_SCROLLWIN_PAGEDOWN)
{
if (orient == wxHORIZONTAL)
nScrollInc = GetScrollPageSize(wxHORIZONTAL);
else
nScrollInc = GetScrollPageSize(wxVERTICAL);
} else
if ((event.GetEventType() == wxEVT_SCROLLWIN_THUMBTRACK) ||
(event.GetEventType() == wxEVT_SCROLLWIN_THUMBRELEASE))
{
if (orient == wxHORIZONTAL)
nScrollInc = pos - m_xScrollPosition;
else
nScrollInc = pos - m_yScrollPosition;
}
if (orient == wxHORIZONTAL)
{
if (m_xScrollPixelsPerLine > 0)
{
int max = (int)(m_hAdjust->upper - m_hAdjust->page_size + 0.5);
if (max < 0) max = 0;
if ( (m_xScrollPosition + nScrollInc) < 0 )
nScrollInc = -m_xScrollPosition; // As -ve as we can go
else if ( (m_xScrollPosition + nScrollInc) > max )
nScrollInc = max - m_xScrollPosition; // As +ve as we can go
}
else
m_targetWindow->Refresh();
}
else
{
if (m_yScrollPixelsPerLine > 0)
{
int max = (int)(m_vAdjust->upper - m_vAdjust->page_size + 0.5);
if (max < 0) max = 0;
if ( (m_yScrollPosition + nScrollInc) < 0 )
nScrollInc = -m_yScrollPosition; // As -ve as we can go
else if ( (m_yScrollPosition + nScrollInc) > max )
nScrollInc = max - m_yScrollPosition; // As +ve as we can go
}
else
m_targetWindow->Refresh();
}
return nScrollInc;
}
void wxScrolledWindow::SetScrollPos( int orient, int pos, bool refresh )
{
wxCHECK_RET( m_widget != NULL, wxT("invalid window") );
wxCHECK_RET( m_wxwindow != NULL, wxT("window needs client area for scrolling") );
if (orient == wxHORIZONTAL)
{
int max = (int)(m_hAdjust->upper - m_hAdjust->page_size + 0.5);
if (max < 0) max = 0;
if (pos > max) pos = 0;
if (pos < 0) pos = 0;
if (pos == (int)(m_hAdjust->value+0.5)) return;
m_hAdjust->value = pos;
}
else
{
int max = (int)(m_vAdjust->upper - m_vAdjust->page_size + 0.5);
if (max < 0) max = 0;
if (pos > max) pos = 0;
if (pos < 0) pos = 0;
if (pos == (int)(m_vAdjust->value+0.5)) return;
m_vAdjust->value = pos;
}
if (m_wxwindow->window)
{
if (orient == wxHORIZONTAL)
{
// Just update the scrollbar, don't send any wxWindows event
GtkHDisconnectEvent();
gtk_signal_emit_by_name( GTK_OBJECT(m_hAdjust), "value_changed" );
GtkHConnectEvent();
}
else
{
// Just update the scrollbar, don't send any wxWindows event
GtkVDisconnectEvent();
gtk_signal_emit_by_name( GTK_OBJECT(m_vAdjust), "value_changed" );
GtkVConnectEvent();
}
}
}
void wxScrolledWindow::GtkVConnectEvent()
{
gtk_signal_connect( GTK_OBJECT(m_vAdjust), "value_changed",
(GtkSignalFunc) gtk_scrolled_window_vscroll_callback, (gpointer) this );
}
void wxScrolledWindow::GtkHConnectEvent()
{
gtk_signal_connect( GTK_OBJECT(m_hAdjust), "value_changed",
(GtkSignalFunc) gtk_scrolled_window_hscroll_callback, (gpointer) this );
}
void wxScrolledWindow::GtkHDisconnectEvent()
{
gtk_signal_disconnect_by_func( GTK_OBJECT(m_hAdjust),
(GtkSignalFunc) gtk_scrolled_window_hscroll_callback, (gpointer) this );
}
void wxScrolledWindow::GtkVDisconnectEvent()
{
gtk_signal_disconnect_by_func( GTK_OBJECT(m_vAdjust),
(GtkSignalFunc) gtk_scrolled_window_vscroll_callback, (gpointer) this );
}
bool wxScrolledWindow::Layout()
{
if (GetSizer() && m_targetWindow == this)
{
// If we're the scroll target, take into account the
// virtual size and scrolled position of the window.
int x, y, w, h;
CalcScrolledPosition(0,0, &x,&y);
GetVirtualSize(&w, &h);
GetSizer()->SetDimension(x, y, w, h);
return TRUE;
}
else
return wxPanel::Layout(); // fall back to default for LayoutConstraints
}
// ----------------------------------------------------------------------------
// event handlers
// ----------------------------------------------------------------------------
// Default OnSize resets scrollbars, if any
void wxScrolledWindow::OnSize(wxSizeEvent& WXUNUSED(event))
{
if( GetAutoLayout() )
{
if( m_targetWindow != this )
m_targetWindow->FitInside();
FitInside();
}
else
{
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)
GetViewStart(&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 xScrollOld = GetScrollPos(wxHORIZONTAL),
yScrollOld = GetScrollPos(wxVERTICAL);
int dsty;
switch ( event.GetKeyCode() )
{
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();
return;
}
int xScroll = GetScrollPos(wxHORIZONTAL);
if ( xScroll != xScrollOld )
{
wxScrollWinEvent event(wxEVT_SCROLLWIN_THUMBTRACK, xScroll,
wxHORIZONTAL);
event.SetEventObject(this);
GetEventHandler()->ProcessEvent(event);
}
int yScroll = GetScrollPos(wxVERTICAL);
if ( yScroll != yScrollOld )
{
wxScrollWinEvent event(wxEVT_SCROLLWIN_THUMBTRACK, yScroll,
wxVERTICAL);
event.SetEventObject(this);
GetEventHandler()->ProcessEvent(event);
}
}
// vi:sts=4:sw=4:et
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