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wxWindows-2.4.0
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toplvcmn.cpp
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2002-08-17
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222 lines
/////////////////////////////////////////////////////////////////////////////
// Name: common/toplvcmn.cpp
// Purpose: common (for all platforms) wxTopLevelWindow functions
// Author: Julian Smart, Vadim Zeitlin
// Created: 01/02/97
// Id: $Id: toplvcmn.cpp,v 1.16 2002/08/17 12:11:03 RR Exp $
// Copyright: (c) 1998 Robert Roebling, Julian Smart and Markus Holzem
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
// ============================================================================
// declarations
// ============================================================================
// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------
#ifdef __GNUG__
#pragma implementation "toplevelbase.h"
#endif
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
#ifndef WX_PRECOMP
#include "wx/toplevel.h"
#include "wx/dcclient.h"
#include "wx/app.h"
#endif // WX_PRECOMP
// ----------------------------------------------------------------------------
// event table
// ----------------------------------------------------------------------------
BEGIN_EVENT_TABLE(wxTopLevelWindowBase, wxWindow)
EVT_CLOSE(wxTopLevelWindowBase::OnCloseWindow)
EVT_SIZE(wxTopLevelWindowBase::OnSize)
END_EVENT_TABLE()
// ============================================================================
// implementation
// ============================================================================
// FIXME: some platforms don't have wxTopLevelWindow yet
#ifdef wxTopLevelWindowNative
IMPLEMENT_DYNAMIC_CLASS(wxTopLevelWindow, wxWindow)
#endif
// ----------------------------------------------------------------------------
// construction/destruction
// ----------------------------------------------------------------------------
wxTopLevelWindowBase::wxTopLevelWindowBase()
{
}
wxTopLevelWindowBase::~wxTopLevelWindowBase()
{
// don't let wxTheApp keep any stale pointers to us
if ( wxTheApp && wxTheApp->GetTopWindow() == this )
wxTheApp->SetTopWindow(NULL);
bool shouldExit = IsLastBeforeExit();
wxTopLevelWindows.DeleteObject(this);
if ( shouldExit )
{
// then do it
wxTheApp->ExitMainLoop();
}
}
bool wxTopLevelWindowBase::Destroy()
{
// delayed destruction: the frame will be deleted during the next idle
// loop iteration
if ( !wxPendingDelete.Member(this) )
wxPendingDelete.Append(this);
return TRUE;
}
bool wxTopLevelWindowBase::IsLastBeforeExit() const
{
// we exit the application if there are no more top level windows left
// normally but wxApp can prevent this from happening
return wxTopLevelWindows.GetCount() == 1 &&
wxTopLevelWindows.GetFirst()->GetData() == (wxWindow *)this &&
wxTheApp && wxTheApp->GetExitOnFrameDelete();
}
// ----------------------------------------------------------------------------
// wxTopLevelWindow geometry
// ----------------------------------------------------------------------------
wxSize wxTopLevelWindowBase::GetMaxSize() const
{
wxSize size( GetMaxWidth(), GetMaxHeight() );
int w, h;
wxClientDisplayRect( 0, 0, &w, &h );
if( size.GetWidth() == -1 )
size.SetWidth( w );
if( size.GetHeight() == -1 )
size.SetHeight( h );
return size;
}
// ----------------------------------------------------------------------------
// wxTopLevelWindow size management: we exclude the areas taken by
// menu/status/toolbars from the client area, so the client area is what's
// really available for the frame contents
// ----------------------------------------------------------------------------
void wxTopLevelWindowBase::DoScreenToClient(int *x, int *y) const
{
wxWindow::DoScreenToClient(x, y);
// translate the wxWindow client coords to our client coords
wxPoint pt(GetClientAreaOrigin());
if ( x )
*x -= pt.x;
if ( y )
*y -= pt.y;
}
void wxTopLevelWindowBase::DoClientToScreen(int *x, int *y) const
{
// our client area origin (0, 0) may be really something like (0, 30) for
// wxWindow if we have a toolbar, account for it before translating
wxPoint pt(GetClientAreaOrigin());
if ( x )
*x += pt.x;
if ( y )
*y += pt.y;
wxWindow::DoClientToScreen(x, y);
}
// ----------------------------------------------------------------------------
// event handlers
// ----------------------------------------------------------------------------
// default resizing behaviour - if only ONE subwindow, resize to fill the
// whole client area
void wxTopLevelWindowBase::OnSize(wxSizeEvent& WXUNUSED(event))
{
// if we're using constraints or sizers - do use them
if ( GetAutoLayout() )
{
Layout();
}
else
{
// do we have _exactly_ one child?
wxWindow *child = (wxWindow *)NULL;
for ( wxWindowList::Node *node = GetChildren().GetFirst();
node;
node = node->GetNext() )
{
wxWindow *win = node->GetData();
// exclude top level and managed windows (status bar isn't
// currently in the children list except under wxMac anyhow, but
// it makes no harm to test for it)
if ( !win->IsTopLevel() && !IsOneOfBars(win) )
{
if ( child )
{
return; // it's our second subwindow - nothing to do
}
child = win;
}
}
// do we have any children at all?
if ( child )
{
// exactly one child - set it's size to fill the whole frame
int clientW, clientH;
DoGetClientSize(&clientW, &clientH);
// for whatever reasons, wxGTK wants to have a small offset - it
// probably looks better with it?
#ifdef __WXGTK__
static const int ofs = 1;
#else
static const int ofs = 0;
#endif
child->SetSize(ofs, ofs, clientW - 2*ofs, clientH - 2*ofs);
}
}
}
// The default implementation for the close window event.
void wxTopLevelWindowBase::OnCloseWindow(wxCloseEvent& WXUNUSED(event))
{
Destroy();
}
bool wxTopLevelWindowBase::SendIconizeEvent(bool iconized)
{
wxIconizeEvent event(GetId(), iconized);
event.SetEventObject(this);
return GetEventHandler()->ProcessEvent(event);
}
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