/////////////////////////////////////////////////////////////////////////////
// Name:        updatesmgr.cpp
// Purpose:     cbSimpleUpdatesMgr implementation.
// Author:      Aleksandras Gluchovas
// Modified by:
// Created:     19/10/98
// RCS-ID:      $Id: updatesmgr.cpp,v 1.3 2002/01/21 22:34:42 JS Exp $
// Copyright:   (c) Aleksandras Gluchovas 
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#ifdef __GNUG__
    #pragma implementation "updatesmgr.h"
#endif

// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"

#ifdef __BORLANDC__
#pragma hdrstop
#endif

#ifndef WX_PRECOMP
#include "wx/wx.h"
#endif

#include "wx/fl/updatesmgr.h"

// helper function

static inline bool rect_hits_rect( const wxRect& r1, const wxRect& r2 )
{
    if ( ( r2.x >= r1.x && r2.x <= r1.x + r1.width ) ||
         ( r1.x >= r2.x && r1.x <= r2.x + r2.width ) )

        if ( ( r2.y >= r1.y && r2.y <= r1.y + r1.height ) ||
             ( r1.y >= r2.y && r1.y <= r2.y + r2.height ) )
             
            return 1;

    return 0;
}

/***** Implementation for class cbSimpleUpdatesMgr *****/

IMPLEMENT_DYNAMIC_CLASS( cbSimpleUpdatesMgr, cbUpdatesManagerBase )

cbSimpleUpdatesMgr::cbSimpleUpdatesMgr( wxFrameLayout* pPanel )
    : cbUpdatesManagerBase( pPanel )
{}

bool cbSimpleUpdatesMgr::WasChanged( cbUpdateMgrData& data, wxRect& currentBounds )
{
    return (   data.IsDirty() ||

             ( data.mPrevBounds.x      != currentBounds.x     ||
               data.mPrevBounds.y      != currentBounds.y     ||
               data.mPrevBounds.width  != currentBounds.width ||
               data.mPrevBounds.height != currentBounds.height  )
           );
}

void cbSimpleUpdatesMgr::OnStartChanges()
{
    // memorize states of ALL items in the layout -
    // this is quite excessive, but OK for the simple 
    // implementation of updates manager

    mpLayout->GetPrevClientRect() = mpLayout->GetClientRect();

    cbDockPane** panes = mpLayout->GetPanesArray();

    for( int n = 0; n != MAX_PANES; ++n )
    {
        cbDockPane& pane = *panes[n];
        // store pane state
        pane.mUMgrData.StoreItemState( pane.mBoundsInParent );
        pane.mUMgrData.SetDirty( FALSE );

        for( size_t i = 0; i != pane.GetRowList().Count(); ++i )
        {
            cbRowInfo& row = *pane.GetRowList()[ i ];

            // store row state
            row.mUMgrData.StoreItemState( row.mBoundsInParent );
            row.mUMgrData.SetDirty( FALSE );

            for( size_t k = 0; k != row.mBars.Count(); ++k )
            {
                cbBarInfo& bar = *row.mBars[ k ];

                // store bar state
                bar.mUMgrData.StoreItemState( bar.mBoundsInParent );
                bar.mUMgrData.SetDirty( FALSE );
            }
        }
    }
}

void cbSimpleUpdatesMgr::OnFinishChanges()
{
    // nothing here, could be overriden by more sophisticated updates-managers
}

void cbSimpleUpdatesMgr::OnRowWillChange( cbRowInfo* pRow, cbDockPane* pInPane )
{
    // -/-
}

void cbSimpleUpdatesMgr::OnBarWillChange( cbBarInfo* pBar, 
                                          cbRowInfo* pInRow, cbDockPane* pInPane )
{
    // -/-
}

void cbSimpleUpdatesMgr::OnPaneMarginsWillChange( cbDockPane* pPane )
{
    // -/-
}

void cbSimpleUpdatesMgr::OnPaneWillChange( cbDockPane* pPane )
{
    // -/-
}

void cbSimpleUpdatesMgr::UpdateNow()
{
    cbDockPane** panes = mpLayout->GetPanesArray();

    wxRect& r1 = mpLayout->GetClientRect();
    wxRect& r2 = mpLayout->GetPrevClientRect();

    // detect changes in client window's area

    bool clientWindowChanged = ( r1.x      != r2.x     ||
                                 r1.y      != r2.y     ||
                                 r1.width  != r2.width ||
                                 r1.height != r2.height );

    // step #1 - detect changes in each row of each pane,
    //           and repaint decorations around changed windows

    wxList mBarsToRefresh;
    wxList mPanesList;

    for( int n = 0; n != MAX_PANES; ++n )
    {
        cbDockPane& pane = *(panes[n]);

        bool paneChanged = WasChanged( pane.mUMgrData, pane.mBoundsInParent );

        if ( paneChanged )
        {
            wxClientDC dc( &mpLayout->GetParentFrame() );
            pane.PaintPaneBackground( dc );
        }

        wxRect realBounds;

        for( size_t i = 0; i != pane.GetRowList().Count(); ++i )
        {
            cbRowInfo& row = *pane.GetRowList()[ i ];

            wxDC* pDc = NULL;

            bool rowChanged = FALSE;

            // FIXME:: the below should not be fixed
            cbBarInfo* barsToRepaint[256];

            // number of bars, that were changed in the current row
            int nBars = 0; 

            if ( WasChanged( row.mUMgrData, row.mBoundsInParent ) )
            
                rowChanged = TRUE;
            else
                for( size_t k = 0; k != row.mBars.Count(); ++k )

                    if ( WasChanged( row.mBars[k]->mUMgrData, 
                         row.mBars[k]->mBoundsInParent ) 
                       )
                    
                        barsToRepaint[nBars++] = row.mBars[k];

            if ( nBars || rowChanged )
            {
                realBounds = row.mBoundsInParent;

                // include 1-pixel thick shades around the row
                realBounds.x -= 1;
                realBounds.y -= 1;
                realBounds.width  += 2;
                realBounds.height += 2;

                pDc = pane.StartDrawInArea( realBounds );
            }

            if ( rowChanged )
            {
                // postphone the resizing and refreshing the changed
                // bar windows

                for( size_t k = 0; k != row.mBars.Count(); ++k )
                {
                    mBarsToRefresh.Append( (wxObject*)row.mBars[k] );
                    mPanesList.Append( &pane );
                }

                // draw only their decorations now

                pane.PaintRow( &row, *pDc );
            }
            else
            if ( nBars != 0 )
            {
                for( int i = 0; i != nBars; ++i )
                {
                    // postphone the resizement and refreshing the changed
                    // bar windows

                    mBarsToRefresh.Append( (wxObject*)barsToRepaint[i] );
                    mPanesList.Append( &pane );
                }

                // redraw decorations of entire row, regardless of how much
                // of the bars were changed
                pane.PaintRow( &row, *pDc );
            }

            if ( pDc )
        
                pane.FinishDrawInArea( realBounds );
        } // end of while

        if ( paneChanged )
        {
            wxClientDC dc( &mpLayout->GetParentFrame() );
            pane.PaintPaneDecorations( dc );
        }

    } // end of for

    if ( clientWindowChanged )
    {
        mpLayout->PositionClientWindow();
        // ptr to client-window object is "marked" as 0
    }

    // step #2 - do ordered refreshing and resizing of bar window objects now

    wxNode* pNode     = mBarsToRefresh.First();
    wxNode* pPaneNode = mPanesList.First();

    while( pNode )
    {
        cbBarInfo*  pBar  = (cbBarInfo*) pNode->Data();
        cbDockPane* pPane = (cbDockPane*)pPaneNode->Data();

        pPane->SizeBar( pBar );

        pNode     = pNode->Next();
        pPaneNode = pPaneNode->Next();
    }

    pNode = mBarsToRefresh.First();

    while( pNode )
    {
        cbBarInfo* pBar = (cbBarInfo*)pNode->Data();

        if ( pBar->mpBarWnd ) 
        {
            pBar->mpBarWnd->Refresh();

            // FIXME::
            //info.mpBarWnd->Show(FALSE);
            //info.mpBarWnd->Show(TRUE);
        }

        pNode  = pNode->Next();
    }

    if ( clientWindowChanged )
    {
        // FIXME:: excessive?

        mpLayout->GetFrameClient()->Refresh();
    }
}


