panedrawpl.cpp

wxGTK 是 wxWidgets 的 linux GTK+ (>2.2.3)版本。wxWidgets 是一个跨平台的 GUI 框架

            {
                dc.SetPen( mpLayout->mDarkPen );
                dc.DrawPoint( bounds.x, bounds.y -1 );
                dc.SetPen( mpLayout->mLightPen );
                dc.DrawPoint( bounds.x, bounds.y + bounds.height );
            }
        }
    }
}

void cbPaneDrawPlugin::DrawLowerRowShades( cbRowInfo* pRow, wxDC& dc, int level )
{
    for( size_t i = 0; i != pRow->mBars.Count(); ++i )
    {
        wxRect& bounds = pRow->mBars[i]->mBoundsInParent;

        if ( mpPane->IsHorizontal() )
        {
            DrawShade( level, bounds, FL_ALIGN_BOTTOM, dc );
            if ( level == 1 )
            {
                dc.SetPen( mpLayout->mDarkPen );
                dc.DrawPoint( bounds.x - 1, bounds.y + bounds.height -1 );
                dc.SetPen( mpLayout->mLightPen );
                dc.DrawPoint( bounds.x + bounds.width , bounds.y + bounds.height -1 );
            }
        }
        else
        {
            DrawShade( level, bounds, FL_ALIGN_RIGHT, dc );
            if ( level == 1 )
            {
                dc.SetPen( mpLayout->mDarkPen );
                dc.DrawPoint( bounds.x + bounds.width - 1, bounds.y -1 );
                dc.SetPen( mpLayout->mLightPen );
                dc.DrawPoint( bounds.x + bounds.width - 1, bounds.y + bounds.height );
            }
        }
    }
}

void cbPaneDrawPlugin::DrawBarInnerShadeRect( cbBarInfo* pBar, wxDC& dc )
{
    wxRect& bounds = pBar->mBoundsInParent;

    dc.SetPen( mpLayout->mDarkPen );
    
    dc.DrawLine( bounds.x + bounds.width - 1,
                 bounds.y,
                 bounds.x + bounds.width - 1,
                 bounds.y + bounds.height );

    dc.DrawLine( bounds.x,
                 bounds.y + bounds.height - 1,
                 bounds.x + bounds.width,
                 bounds.y + bounds.height -1  );

    dc.SetPen( mpLayout->mLightPen );

    dc.DrawLine( bounds.x,
                 bounds.y,
                 bounds.x + bounds.width - 1,
                 bounds.y );

    dc.DrawLine( bounds.x,
                 bounds.y,
                 bounds.x,
                 bounds.y + bounds.height - 1 );
}

void cbPaneDrawPlugin::DrawShade( int level, wxRect& rect, int alignment, wxDC& dc )
{
    // simulates "guled-bricks" appearence of control bars

    if ( ( alignment == FL_ALIGN_TOP    && level == 1 ) ||
         ( alignment == FL_ALIGN_BOTTOM && level == 0 ) ||
         ( alignment == FL_ALIGN_LEFT   && level == 1 ) ||
         ( alignment == FL_ALIGN_RIGHT  && level == 0 )
       )
    
        dc.SetPen( mpLayout->mDarkPen  );
    else
        dc.SetPen( mpLayout->mLightPen );

    if ( alignment == FL_ALIGN_TOP )
    {
        if ( level == 0 )
        
            dc.DrawLine( rect.x, 
                         rect.y,
                         rect.x + rect.width - 1,
                         rect.y );
        else
            dc.DrawLine( rect.x - 1,
                         rect.y - 1,
                         rect.x + rect.width + 0,
                         rect.y - 1 );
    }
    else
    if ( alignment == FL_ALIGN_BOTTOM )
    {
        if ( level == 0 )
        
            dc.DrawLine( rect.x, 
                         rect.y + rect.height - 1,
                         rect.x + rect.width,
                         rect.y + rect.height - 1 );
        else
            dc.DrawLine( rect.x - 1,
                         rect.y + rect.height,
                         rect.x + rect.width + 1,
                         rect.y + rect.height );
    }
    else
    if ( alignment == FL_ALIGN_LEFT )
    {
        if ( level == 0 )
        
            dc.DrawLine( rect.x, 
                         rect.y,
                         rect.x,
                         rect.y + rect.height - 1 );
        else
            dc.DrawLine( rect.x - 1,
                         rect.y - 1,
                         rect.x - 1,
                         rect.y + rect.height );
    }
    else
    if ( alignment == FL_ALIGN_RIGHT )
    {
        if ( level == 0 )
        
            dc.DrawLine( rect.x + rect.width - 1, 
                         rect.y,
                         rect.x + rect.width - 1,
                         rect.y + rect.height );
        else
        {                     
            dc.DrawLine( rect.x + rect.width,
                         rect.y - 1,
                         rect.x + rect.width,
                         rect.y + rect.height + 1  );
        }
    }
}

void cbPaneDrawPlugin::DrawShade1( int level, wxRect& rect, int alignment, wxDC& dc )
{
    // simulates "guled-bricks" appearence of control bars

    if ( ( alignment == FL_ALIGN_TOP    && level == 1 ) ||
         ( alignment == FL_ALIGN_BOTTOM && level == 0 ) ||
         ( alignment == FL_ALIGN_LEFT   && level == 1 ) ||
         ( alignment == FL_ALIGN_RIGHT  && level == 0 )
       )
    
        dc.SetPen( mpLayout->mDarkPen  );
    else
        dc.SetPen( mpLayout->mLightPen );

    if ( alignment == FL_ALIGN_TOP )
    {
        if ( level == 0 )
        
            dc.DrawLine( rect.x, 
                         rect.y,
                         rect.x + rect.width,
                         rect.y );
        else
            dc.DrawLine( rect.x,
                         rect.y - 1,
                         rect.x + rect.width,
                         rect.y - 1 );
    }
    else
    if ( alignment == FL_ALIGN_BOTTOM )
    {
        if ( level == 0 )
        
            dc.DrawLine( rect.x, 
                         rect.y + rect.height - 1,
                         rect.x + rect.width,
                         rect.y + rect.height - 1 );
        else
            dc.DrawLine( rect.x,
                         rect.y + rect.height,
                         rect.x + rect.width,
                         rect.y + rect.height );
    }
    else
    if ( alignment == FL_ALIGN_LEFT )
    {
        if ( level == 0 )
        
            dc.DrawLine( rect.x, 
                         rect.y,
                         rect.x,
                         rect.y + rect.height );
        else
            dc.DrawLine( rect.x - 1,
                         rect.y,
                         rect.x - 1,
                         rect.y + rect.height );
    }
    else
    if ( alignment == FL_ALIGN_RIGHT )
    {
        if ( level == 0 )
        
            dc.DrawLine( rect.x + rect.width - 1, 
                         rect.y,
                         rect.x + rect.width - 1,
                         rect.y + rect.height );
        else
        {                     
            dc.DrawLine( rect.x + rect.width,
                         rect.y ,
                         rect.x + rect.width,
                         rect.y + rect.height );
        }
    }
}

void cbPaneDrawPlugin::DrawPaneShade( wxDC& dc, int alignment )
{
    if ( !mpPane->mProps.mShow3DPaneBorderOn ) return;

    wxRect bounds = mpPane->mBoundsInParent;

    bounds.x      += mpPane->mLeftMargin;
    bounds.y      += mpPane->mTopMargin;
    bounds.width  -= ( mpPane->mLeftMargin + mpPane->mRightMargin  );
    bounds.height -= ( mpPane->mTopMargin  + mpPane->mBottomMargin );

    DrawShade( 0, bounds, alignment, dc );
    DrawShade( 1, bounds, alignment, dc );
}

void cbPaneDrawPlugin::DrawPaneShadeForRow( cbRowInfo* pRow, wxDC& dc )
{
    if ( !mpPane->mProps.mShow3DPaneBorderOn ) return;

    // do not draw decoration, if pane has "vainished"
    if ( mpPane->mPaneWidth  < 0 ||
         mpPane->mPaneHeight < 0 )

         return;

    wxRect bounds = pRow->mBoundsInParent;

    if ( mpPane->mAlignment == FL_ALIGN_TOP ||
         mpPane->mAlignment == FL_ALIGN_BOTTOM )
    {
        --bounds.y;
        bounds.height += 2;

        DrawShade1( 0, bounds, FL_ALIGN_LEFT, dc );
        DrawShade1( 1, bounds, FL_ALIGN_LEFT, dc );
        DrawShade1( 0, bounds, FL_ALIGN_RIGHT, dc );
        DrawShade1( 1, bounds, FL_ALIGN_RIGHT, dc );

        if ( !pRow->mpNext )
            DrawPaneShade( dc, FL_ALIGN_BOTTOM );

        if ( !pRow->mpPrev )
            DrawPaneShade( dc, FL_ALIGN_TOP );
    }
    else
    {
        --bounds.x;
        bounds.width += 2;

        DrawShade1( 0, bounds, FL_ALIGN_TOP, dc );
        DrawShade1( 1, bounds, FL_ALIGN_TOP, dc );
        DrawShade1( 0, bounds, FL_ALIGN_BOTTOM, dc );
        DrawShade1( 1, bounds, FL_ALIGN_BOTTOM, dc );

        if ( !pRow->mpNext )
            DrawPaneShade( dc, FL_ALIGN_RIGHT );

        if ( !pRow->mpPrev )
            DrawPaneShade( dc, FL_ALIGN_LEFT );
    }
}

void cbPaneDrawPlugin::OnDrawPaneDecorations( cbDrawPaneDecorEvent& event )
{
    wxDC& dc = *event.mpDc;

    cbDockPane* pPane = event.mpPane;

    RowArrayT& lst = pPane->GetRowList();
    
    // FIXME:: this is a workaround for some glitches

    if ( lst.Count() )
    {
        cbRowInfo* pLastRow = lst[ lst.Count() - 1 ];

        pPane->PaintRowBackground( pLastRow,  dc );
        pPane->PaintRowDecorations( pLastRow, dc );
        pPane->PaintRowHandles( pLastRow, dc );
    }

    if ( !pPane->mProps.mShow3DPaneBorderOn ) return;

    // do not draw decoration, if pane is completely hidden
    if ( event.mpPane->mPaneWidth  < 0 ||
         event.mpPane->mPaneHeight < 0 )

         return;

    DrawPaneShade( dc, FL_ALIGN_TOP    );
    DrawPaneShade( dc, FL_ALIGN_BOTTOM );
    DrawPaneShade( dc, FL_ALIGN_LEFT   );
    DrawPaneShade( dc, FL_ALIGN_RIGHT  );

    event.Skip(); // pass event to the next plugin
}

// bar decoration/sizing handlers

void cbPaneDrawPlugin::OnDrawBarDecorations( cbDrawBarDecorEvent& event )
{
//    cbBarInfo* pBar = event.mpBar;
    wxDC&   dc      = *event.mpDc;

    // draw brick borders

    wxRect& rect = event.mBoundsInParent;

    dc.SetPen( mpLayout->mLightPen );

    // horiz
    dc.DrawLine( rect.x, rect.y, 
                 rect.x + rect.width-1, rect.y );

    // vert
    dc.DrawLine( rect.x, rect.y,
                 rect.x, rect.y + rect.height-1 );


    dc.SetPen( mpLayout->mDarkPen );

    // vert
    dc.DrawLine( rect.x + rect.width-1, rect.y,
                 rect.x + rect.width-1, rect.y + rect.height-1 );

    // horiz
    dc.DrawLine( rect.x, rect.y + rect.height-1,
                 rect.x + rect.width, rect.y + rect.height-1 );

    event.Skip(); // pass event to the next plugin
}

void cbPaneDrawPlugin::OnDrawBarHandles( cbDrawBarHandlesEvent& event )
{
    // short-cuts
    cbBarInfo* pBar = event.mpBar;
    wxDC&   dc      = *event.mpDc;
    mpPane          = event.mpPane;

    // draw handles around the bar if present

    if ( pBar->mHasLeftHandle ||
         pBar->mHasRightHandle )
    {
        wxRect& bounds = pBar->mBoundsInParent;

        if ( mpPane->IsHorizontal() )
        {
            if ( pBar->mHasLeftHandle )

                mpPane->DrawVertHandle( dc, bounds.x - mpPane->mProps.mResizeHandleSize -1, 
                                        bounds.y, bounds.height );

            if ( pBar->mHasRightHandle )

                mpPane->DrawVertHandle( dc, 
                                        bounds.x + bounds.width -1, 
                                        bounds.y, bounds.height );
        }
        else
        {
            if ( pBar->mHasLeftHandle )

                mpPane->DrawHorizHandle( dc, bounds.x, 
                                         bounds.y  - mpPane->mProps.mResizeHandleSize - 1, 
                                         bounds.width );

            if ( pBar->mHasRightHandle )

                mpPane->DrawHorizHandle( dc, bounds.x, 
                                         bounds.y + bounds.height - 1,
                                         bounds.width );
        }
    }

    event.Skip(); // pass event to the next plugin
}

void cbPaneDrawPlugin::OnStartDrawInArea( cbStartDrawInAreaEvent& event )
{
    // DBG::
    wxASSERT( mpClntDc == NULL );

    // FOR NOW:: create/destroy client-dc upon each drawing
    mpClntDc = new wxClientDC( &mpLayout->GetParentFrame() );

    (*event.mppDc) = mpClntDc;

    mpClntDc->SetClippingRegion( event.mArea.x,     event.mArea.y,
                                 event.mArea.width, event.mArea.height );
}

void cbPaneDrawPlugin::OnFinishDrawInArea( cbFinishDrawInAreaEvent& WXUNUSED(event) )
{
    // DBG::
    wxASSERT( mpClntDc );

    delete mpClntDc;

    mpClntDc = NULL;
}