void CEasySizeDialog::OnSizing(UINT fwSide, LPRECT pRect)
{
CDialogEx::OnSizing(fwSide, pRect);
if (_resizable)
{
CSize min_size = OnGetMinSize();
EASYSIZE_MINSIZE(min_size.cx, min_size.cy, fwSide, pRect);
}
}
// Window procedure override. Handles layout engine private messages.
LRESULT ClsLayoutEngine::WindowProc( UINT uMsg, WPARAM wParam, LPARAM lParam )
{
// Interpred message.
switch ( uMsg )
{
case WM_CREATE:
{
// Get the default font height used
// by the layout control. This information
// is needed if the control font is not
// set.
ClsGetDC dc( this );
ClsSize sz = dc.GetTextExtent( _T( "W" ), 1 );
m_nFontHeight = sz.CY();
break;
}
case WM_GETFONT:
// Valid font?
return ( LRESULT )( m_Font.IsValid() ? ( HFONT )m_Font : NULL );
case WM_SETFONT:
{
// Detach old font.
m_Font.Detach();
// Valid?
if ( wParam )
{
// Attach the new font.
m_Font.Attach(( HFONT )wParam, FALSE );
// Set the font to the frame
// if it exists.
if ( m_Frame.GetSafeHWND())
m_Frame.SetFont( &m_Font, FALSE );
// Pass this message to all our members
// when they do not have a font set.
ClsMember *pMember;
for ( pMember = m_Members.GetFirst(); pMember; pMember = m_Members.GetNext( pMember ))
{
// Skip spacing members.
if (( pMember->m_dwFlags & ClsMember::MF_SPACING ) != ClsMember::MF_SPACING )
{
// Does it have a font?
if ( pMember->m_pMember->SendMessage( WM_GETFONT ) == NULL )
// No. Set it.
pMember->m_pMember->SendMessage( WM_SETFONT, wParam, MAKELPARAM( FALSE, 0 ));
}
}
// Pickup the font height.
ClsGetDC dc(this);
ClsSelector sel( &dc, ( HFONT )wParam );
ClsSize sz = dc.GetTextExtent( _T( "W" ), 1 );
// Store the height.
m_nFontHeight = sz.CY();
m_dwFlags &= ~LF_DIMENSIONED;
}
break;
}
case WM_ISLAYOUTENGINE:
// Yes, we really are a layout engine...
return TRUE;
case WM_ORGANIZE:
// Organize the members.
m_dwFlags &= ~LF_ORGANIZED;
OrganizeMembers();
return TRUE;
case WM_GETCONTROLS:
// Add members to the passed list.
GetControls(( ClsLinkedList<ClsCNode> * )lParam );
return TRUE;
case WM_ERRORS:
// Return error bool.
return ( LRESULT )(( BOOL )( m_dwFlags & LF_ADDERROR ));
//case WM_SIZE:
// Resize the frame.
// if ( m_bFrameGroup && m_Frame.GetSafeHWND())
// {
// ClsRect rc;
// GetClientRect( rc );
// m_Frame.MoveWindow( rc, FALSE );
// }
// return 0;
case WM_RELAYOUT:
// Group dimensioned? When ever a group contents
// has changed we need to call the OnGetMinSize()
// method before we re-layout. This is to make sure
// the layout engine always works with the latest
// information.
if (( m_dwFlags & LF_DIMENSIONED ) != LF_DIMENSIONED )
{
ClsSize szMinSize( 0, 0 );
// OK?
if ( OnGetMinSize( szMinSize ) == FALSE )
return FALSE;
}
// Is this the master group?
if ( m_dwFlags & LF_MASTER )
{
// Organized?
if (( m_dwFlags & LF_ORGANIZED ) != LF_ORGANIZED )
OrganizeMembers();
// Get the parent it's client rectangle.
ClsRect rc = GetParent()->GetClientRect();
// Re-size the group.
MoveWindow( rc, FALSE );
}
// Scale the group members.
if ( m_bIsHorizontal ) ScaleHGroup();
else ScaleVGroup();
// Master group?
if ((( m_dwFlags & LF_MASTER ) == LF_MASTER ) && GetParent()->IsWindowVisible())
// Force the parent to redraw.
GetParent()->RedrawWindow( NULL, NULL, RDW_INVALIDATE | RDW_ERASE | RDW_ALLCHILDREN );
return TRUE;
case WM_SHOWMEMBERS:
{
// Show/Hide members.
ClsMember *pMember;
for ( pMember = m_Members.GetFirst(); pMember; pMember = m_Members.GetNext( pMember ))
{
// A spacing member?
if (( pMember->m_dwFlags & ClsMember::MF_SPACING ) != ClsMember::MF_SPACING )
{
if ( pMember->m_pMember->SendMessage( WM_ISLAYOUTENGINE )) pMember->m_pMember->SendMessage( WM_SHOWMEMBERS, wParam );
else
{
pMember->m_pMember->ShowWindow( wParam ? SW_SHOW : SW_HIDE );
if ( wParam ) pMember->m_pMember->UpdateWindow();
}
}
}
// Show/Hide the frame.
if ( m_bFrameGroup && m_Frame.GetSafeHWND())
{
m_Frame.ShowWindow( wParam ? SW_SHOW : SW_HIDE );
if ( wParam ) m_Frame.UpdateWindow();
}
return TRUE;
}
case WM_REFRESH:
{
// Do longer dimensioned or organized...
m_dwFlags &= ~( LF_ORGANIZED | LF_DIMENSIONED );
// Refresh layout engine members.
ClsMember *pMember;
for ( pMember = m_Members.GetFirst(); pMember; pMember = m_Members.GetNext( pMember ))
{
// A spacing member?
if (( pMember->m_dwFlags & ClsMember::MF_SPACING ) != ClsMember::MF_SPACING )
{
// Is it a layout engine?
if ( pMember->m_pMember->SendMessage( WM_ISLAYOUTENGINE ))
pMember->m_pMember->SendMessage( WM_REFRESH );
}
}
// Are we the master?
if ( m_dwFlags & LF_MASTER )
// Layout the group.
SendMessage( WM_RELAYOUT );
return TRUE;
}
}
// Call the base class.
return ClsWindow::WindowProc( uMsg, wParam, lParam );
}