seqgraphic_render.cpp

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    // prevent Y from resizing in feature panel
    TModelRect& rcV = m_FP.GetVisibleRect();
    rcV.SetTop(0);
    rcV.SetBottom( abs(m_FP.GetViewport().Height()) - 1 );
    m_FP.SetVisibleRect(rcV);

    m_MaxZoomX = log(m_FP.GetModelLimitsRect().Width() / rc.Width());
}



// this function takes an absolute mouse coordinate and determines if any
// features lie underneath the mouse position
// x & y are GL coordinates
const CLayoutObject* CSeqGraphicRenderer::HitTest(int x, int y)
{
    // Main Feature Panel
    if (PanelHitTest(x, y) == eFeatures) {
        return m_FeatPanel.HitTest(m_FP, x, y);
    }
    return NULL;
}


CSeqGraphicRenderer::TRendererPanel
CSeqGraphicRenderer::PanelHitTest(int x, int y) const
{
    if (m_FP.GetViewport().PtInRect(x, y))
        return eFeatures;
    if (m_RP.GetViewport().PtInRect(x, y))
        return eRuler;

    return eNone;
}


void CSeqGraphicRenderer::GetTooltip(int x, 
                    int y, string* title)
{
    *title = "";
    
    const CLayoutObject* obj = HitTest(x, y);
    if (!obj) return;
    
    TRendererPanel pan = PanelHitTest(x, y);
    if (pan == eFeatures)
        m_FeatPanel.GetTooltip(obj, title);
}


void CSeqGraphicRenderer::SelectObject(const CObject* obj)
{
    m_SelectedObjects.push_back(
        CRef<CObject>(const_cast<CObject*>(obj)));
}


void CSeqGraphicRenderer::SetLensZoom(int x, int y)
{ 
    TVPRect& rcFP = m_FP.GetViewport();

    if (rcFP.PtInRect(x, y)) {
        m_NeedLensZoom = true;
        m_FP.OpenOrtho();
        m_LensZoom = m_FP.UnProject(x, y);
        m_FP.Close();
    } else {
        m_NeedLensZoom = false;
    }
}


void CSeqGraphicRenderer::CancelLensZoom()
{
    m_NeedLensZoom = false;
}


float CSeqGraphicRenderer::GetZoomX(void) const
{
    TModelUnit scale_x = log(m_FP.GetScaleX());
    return 1.0f - (scale_x - m_MinZoomX) / (m_MaxZoomX - m_MinZoomX);
}


void CSeqGraphicRenderer::SetZoomX(float value)
{
//	cout << "In Renderer::SetZoomX" << endl;
    // slider is set up from 0 to 1. Convert to our units:
    TModelUnit scale = m_MinZoomX + (m_MaxZoomX - m_MinZoomX) * (1.0f - value);

    NON_CONST_ITERATE(TGlPanes, iter, m_ScrollXPanes) {
        CGlPane& pane = **iter;

        pane.SetScale(exp(scale), pane.GetScaleY(), 
                      pane.GetVisibleRect().CenterPoint() );
    }
}


void CSeqGraphicRenderer::ZoomInCenter()
{
    ITERATE(TGlPanes, iter, m_ScrollXPanes) {
        (*iter)->ZoomInCenter();
    }
}


void CSeqGraphicRenderer::ZoomOutCenter()
{
    ITERATE(TGlPanes, iter, m_ScrollXPanes) {
        (*iter)->ZoomOutCenter();
    }
} 


void CSeqGraphicRenderer::ZoomAll()
{
    ITERATE(TGlPanes, iter, m_ScrollXPanes) {
        (*iter)->ZoomAll();
    }
} 


void CSeqGraphicRenderer::SetScaleRef(TModelUnit scale_x, TModelUnit scale_y, 
                                      const TModelPoint& point)
{
    if(scale_x > m_FP.GetMinScaleX())  {
        ITERATE(TGlPanes, iter, m_ScrollXPanes) {
            TModelPoint ref_p(point.X(),  (*iter)->GetVisibleRect().Top());
            
            // It may be a little confusing, but
            // model space is setup differently in m_RP panel
            (*iter)->SetScaleRefPoint(scale_x, *iter == &m_RP ? 1 : -1, ref_p);
        }
    }
}


void CSeqGraphicRenderer::ZoomOnObject(const CLayoutObject* obj)
{
    if (!obj) 
        return;
        
    TSeqRange range = obj->GetLocation().GetTotalRange();
    ZoomOnRange(range);
}


void CSeqGraphicRenderer::ZoomOnRange(const TSeqRange& range)
{
    NON_CONST_ITERATE(TGlPanes, iter, m_ScrollXPanes) {
        CGlPane& pane = **iter;
        TModelRect& rc = pane.GetVisibleRect();
        //TModelUnit height = -rc.Height();

        rc.SetLeft (range.GetFrom());
        rc.SetRight(range.GetTo()  );
        //rc.SetTop(0);
        //rc.SetBottom(height);
        //pane.SetVisibleRect(rc);
        pane.ZoomRect(rc);
    }
}


TSeqRange CSeqGraphicRenderer::GetVisibleRange() const
{
    const TModelRect& rc = m_FP.GetVisibleRect();

    return TSeqRange( TSeqPos(rc.Left()), TSeqPos(rc.Right()) );
}


CGlPane& CSeqGraphicRenderer::GetFeatGlPane()
{
    return m_FP;
}


CGlPane& CSeqGraphicRenderer::GetRulerGlPane()
{
    return m_RP;
}


void CSeqGraphicRenderer::Scroll(TModelUnit x, TModelUnit y)
{
    const TModelRect& rc = m_FP.GetVisibleRect();
    
    double dX = x - rc.Left();
    double dY = y - rc.Top();
    
    // Handle horizintal scrollbar
    ITERATE(TGlPanes, iter, m_ScrollXPanes) {
        (*iter)->Scroll(dX, 0.0f);
    }
    
    // Handle vertical scrollbar
    m_FP.Scroll(0.0f, dY);
}


TModelUnit CSeqGraphicRenderer::GetScrollLineSize()
{
    m_FP.OpenOrtho();
    TModelUnit value = m_FP.UnProjectWidth(kMaxPixelsBase);
    m_FP.Close();
    
    return value;
}


    
END_NCBI_SCOPE



/*
 * ===========================================================================
 * $Log: seqgraphic_render.cpp,v $
 * Revision 1000.7  2004/06/01 21:12:56  gouriano
 * PRODUCTION: UPGRADED [GCC34_MSVC7] Dev-tree R1.97
 *
 * Revision 1.97  2004/05/31 00:29:47  dicuccio
 * Reverted changed with regard to background - use glClear() instead of
 * CGlBackground, avoids rendering artifact for now
 *
 * Revision 1.96  2004/05/21 22:27:55  gorelenk
 * Added PCH ncbi_pch.hpp
 *
 * Revision 1.95  2004/05/21 13:50:13  lebedev
 * Adjust object panel model space when using  ruler panel offsets
 *
 * Revision 1.94  2004/05/14 15:57:11  lebedev
 * Optional argument to specify the type of title/tooltip added
 *
 * Revision 1.93  2004/05/13 16:20:57  lebedev
 * Respect Ruler bar size for HTML active areas
 *
 * Revision 1.92  2004/05/12 16:54:12  lebedev
 * Added  option to specify a space between the ruler and the rest of the dispay
 *
 * Revision 1.91  2004/05/10 15:06:32  lebedev
 * Offset HTML Active areas by the height of the ruler bar
 *
 * Revision 1.90  2004/04/16 15:54:11  dicuccio
 * Removed dead code
 *
 * Revision 1.89  2004/04/14 11:25:48  lebedev
 * Added rendering of Mate Pairs.
 *
 * Revision 1.88  2004/04/06 13:44:17  dicuccio
 * Changed draw -> Render.  Changed resize -> Resize
 *
 * Revision 1.87  2004/03/31 16:08:58  lebedev
 * Methods to get HTML active areas added.
 *
 * Revision 1.86  2004/03/30 13:58:37  lebedev
 * Use elements colors from configuration instead of setting colors directly.
 *
 * Revision 1.85  2004/03/24 15:15:34  dicuccio
 * Changed include for renderer.  Added GetHeight().  Rewrote x_SetupViewports()
 * to handleviewports that have non-zero origins.  Changed clearing of background
 * - use CGlBackground indtead of glClear()
 *
 * Revision 1.84  2004/03/23 12:33:55  lebedev
 * Made sequence and histograms bars a layout objects in the object panel.
 * Made segment map a number of layout objects. Get rid of fixed size rows in the object panel.
 *
 * Revision 1.83  2004/03/12 15:58:15  lebedev
 * ZoomAll method added
 *
 * Revision 1.82  2004/03/11 17:53:06  dicuccio
 * Deprecated typedefs TPosition, TDimension, TIndex, TColor.  Use TSeqRange instead of TRange
 *
 * Revision 1.81  2004/03/04 14:39:27  lebedev
 * Re-enable lens zoom.
 *
 * Revision 1.80  2004/02/24 14:43:14  lebedev
 * Genome-scale rendering policy added
 *
 * Revision 1.79  2004/02/13 18:14:33  lebedev
 * Make use of new ILayoutPolicy interface
 *
 * Revision 1.78  2004/02/10 13:15:33  lebedev
 * ISelHandlerHost interface implemented for selections on sequence pane
 *
 * Revision 1.77  2004/01/29 14:11:54  dicuccio
 * Wrapped draw() in try/catch to minimize unhandled exceptions.  Use TSeqRange
 * instead of TRange
 *
 * Revision 1.76  2004/01/27 16:14:42  lebedev
 * Methods for working with selections added
 *
 * Revision 1.75  2004/01/20 20:34:12  rsmith
 * add ConfigureRenderPolicy and UpdateConfig methods, so that render policy can be changed on the fly.
 *
 * Revision 1.74  2004/01/16 18:43:56  dicuccio
 * Dropped const on GetTooltip() - cascade of const functions made inavlid by this
 *
 * Revision 1.73  2004/01/16 13:40:15  lebedev
 * Tooltips added
 *
 * Revision 1.72  2003/12/22 12:55:53  lebedev
 * Old files removed
 *
 * Revision 1.71  2003/12/16 18:56:37  lebedev
 * Introduced Rendering Policies for feature panels
 *
 * Revision 1.70  2003/12/09 12:40:00  lebedev
 * Implemented IMouseZoomHandlerHost interface for zooming and scrolling with mouse
 *
 * Revision 1.69  2003/11/20 12:22:33  lebedev
 * Changed model space coordinates for Ruler pane (missing ruler bug)
 *
 * Revision 1.68  2003/11/19 20:37:46  friedman
 * API to detect and reset visible range change
 *
 * Revision 1.67  2003/11/14 13:51:49  lebedev
 * Do not scroll ruler bar vertically
 *
 * Revision 1.66  2003/11/13 19:11:07  lebedev
 * Objects selection reorganized. One row ofset bug in selection fixed
 *
 * Revision 1.65  2003/11/13 15:31:53  lebedev
 * Methods to get visible sequence range added
 *
 * Revision 1.64  2003/11/04 17:00:39  lebedev
 * Reverse and Compliment the sequence displayed under CDSs and Proteins on negative strand
 *
 * Revision 1.63  2003/11/04 12:43:06  lebedev
 * Ruler bar added
 *
 * Revision 1.62  2003/10/31 19:06:43  yazhuk
 * Fixed "mouse zoom drifting" bug.
 *
 * Revision 1.61  2003/10/30 13:21:59  lebedev
 * Display of master sequence under selected CDSs and Proteins added
 *
 * Revision 1.60  2003/10/28 19:01:43  dicuccio
 * Fixed compilation errors.  Pass CBioseq_Handle by const-ref and store as value,
 * not as pointer
 *
 * Revision 1.59  2003/10/28 15:29:07  lebedev
 * Use new configuration library
 *
 * Revision 1.58  2003/10/24 13:59:56  lebedev
 * Make vertical scrollbar always visible
 *
 * Revision 1.57  2003/10/24 13:25:56  lebedev
 * Use logarithmic scale fo zoom.
 * Better scrolling in sequence pane.
 *
 * Revision 1.56  2003/10/22 18:32:56  lebedev
 * Histogram display of features added (and compressed display)
 * Zoom to mouse and scroll with mouse added.
 *
 * Revision 1.55  2003/10/21 13:44:48  lebedev
 * Variable renamed to solve name conflict in CodeWarrior
 *
 * Revision 1.54  2003/10/10 15:29:11  lebedev
 * Selection on a sequence and icon view added
 *
 * Revision 1.53  2003/10/10 12:57:48  lebedev
 * Zoom sensitivity reduced
 *
 * Revision 1.52  2003/10/09 17:59:38  lebedev
 * Compilation error fixed
 *
 * Revision 1.51  2003/10/09 16:27:09  lebedev
 * Widget redesign: Use independent IRenderable panels for display
 *
 * ===========================================================================
 */