panedrawpl.cpp

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

            if ( mIsUpperHandle )

                mHandleOfs = mpResizedRow->mRowY;
            else
                mHandleOfs = mpResizedRow->mRowY + 
                             mpResizedRow->mRowHeight -
                             event.mpPane->mProps.mResizeHandleSize;
        }
        else
        {
            // otehrwise if bar handle dragged

//            cbRowInfo& rowInfo     = *mpDraggedBar->mpRow;
            wxRect& bounds         = mpDraggedBar->mBounds;

            mHandleIsVertical = ( event.mpPane->IsHorizontal() ) ? true : false;

            mHandleDragArea.x      = from;
            mHandleDragArea.width  = till - from;


            mHandleDragArea.y      = bounds.y;
            mHandleDragArea.height = bounds.height;

            // left-side-handle mBounds
            if ( mIsLeftHandle )

                mHandleOfs = bounds.x;
            else
                mHandleOfs = bounds.x + 
                             bounds.width - event.mpPane->mProps.mResizeHandleSize;

        }

        event.mpPane->PaneToFrame( &mHandleDragArea );
        DrawDraggedHandle(mDragOrigin, *event.mpPane);

        mPrevPos = mDragOrigin;

        return;
        // handled is dragged, thus event is "eaten" by this plugin
    }
    else
    {
        cbBarInfo* pDraggedBar;

        if ( event.mpPane->HitTestPaneItems( event.mPos,       // in pane's coordiantes
                                             &mpResizedRow,
                                             &pDraggedBar ) == CB_BAR_CONTENT_HITTED 
           )
        {
            int x = event.mPos.x,
                y = event.mPos.y;

            event.mpPane->PaneToFrame( &x, &y );

            cbStartBarDraggingEvent dragEvt( pDraggedBar, wxPoint(x,y), event.mpPane );

            mpLayout->FirePluginEvent( dragEvt );

            return; // event is "eaten" by this plugin
        }
    }

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

void cbPaneDrawPlugin::OnLButtonUp( cbLeftUpEvent& event ) 
{
    if ( mResizeStarted )
    {
        DrawDraggedHandle( event.mPos, *event.mpPane );

        mResizeStarted  = false;
        mResizeCursorOn = false;

        mpLayout->ReleaseEventsFromPane( event.mpPane );
        mpLayout->ReleaseEventsFromPlugin( this );

        // In Windows, at least, the frame needs to have a null cursor
        // else child windows (such as text windows) inherit the cursor
#if 1
        mpLayout->GetParentFrame().SetCursor( wxNullCursor );
#else
        mpLayout->GetParentFrame().SetCursor( *mpLayout->mpNormalCursor );
#endif

        if ( mRowHandleHitted )
        {
            event.mpPane->ResizeRow( mpResizedRow, 
                                     mDraggedDelta,
                                     mIsUpperHandle );
        }
        else
        {
            event.mpPane->ResizeBar( mpDraggedBar, 
                                     mDraggedDelta,
                                     mIsLeftHandle );
        }

        mpDraggedBar = NULL;
        mpResizedRow = NULL;

        // handled dragging action was finished by this mouse-up, 
        // thus event is "eaten" by this plugin

        return;
    }

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

void cbPaneDrawPlugin::OnRButtonUp( cbRightUpEvent&   event )
{
    wxPoint fpos = event.mPos;
    event.mpPane->PaneToFrame( &fpos.x, &fpos.y );

    cbBarInfo* pDraggedBar;

    // user clicks inside the bar contnet, fire bar-customization event

    if ( event.mpPane->HitTestPaneItems( event.mPos,       // in pane's coordiantes
                                         &mpResizedRow,
                                         &pDraggedBar  ) == CB_BAR_CONTENT_HITTED
       )
    {
        cbCustomizeBarEvent cbEvt( pDraggedBar, fpos, event.mpPane );

        mpLayout->FirePluginEvent( cbEvt );

        return; // event is "eaten" by this plugin
    }

    // otherwise fire whole-layout customization event

    cbCustomizeLayoutEvent csEvt( fpos );

    mpLayout->FirePluginEvent( csEvt );

    // event is "eaten" by this plugin
}

void cbPaneDrawPlugin::OnSizeBarWindow( cbSizeBarWndEvent& event ) 
{
    cbBarInfo& bar = *event.mpBar;
    mpPane         = event.mpPane;

    // it's possible that a bar does not have it's own window!
    if ( !bar.mpBarWnd ) return;

    wxRect& bounds = event.mBoundsInParent;

    // check visibility
    if ( bounds.height != 0 )
    {
        // size smaller than bounds, to leave space for shade lines

        // FIXME:: +/- 1s

        int nNewHeight = bounds.height - 2 - bar.mDimInfo.mVertGap *2;
        if(nNewHeight < 0)
           nNewHeight = 0;

        bar.mpBarWnd->wxWindow::SetSize( bounds.x      + 1 + bar.mDimInfo.mHorizGap,     
                                         bounds.y      + 1 + bar.mDimInfo.mVertGap,
                                         bounds.width  - 2 - bar.mDimInfo.mHorizGap*2,
                                         nNewHeight,
                                         0 
                                       );

        if ( !bar.mpBarWnd->IsShown() )

            bar.mpBarWnd->Show( true );
    }
    else
        // hide bar if not visible
        bar.mpBarWnd->Show( false );

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

void cbPaneDrawPlugin::OnDrawRowDecorations( cbDrawRowDecorEvent& event )
{
    DrawPaneShadeForRow( event.mpRow, *event.mpDc );

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

void cbPaneDrawPlugin::DrawUpperRowHandle( cbRowInfo* pRow, wxDC& dc )
{
    wxRect& bounds = pRow->mBoundsInParent;

    if ( mpPane->IsHorizontal() )
    {
         if ( pRow->mHasUpperHandle )
        
            mpPane->DrawHorizHandle( dc, bounds.x, 
                                     bounds.y-1, 
                                      pRow->mRowWidth );
    }
    else
    {
        if ( pRow->mHasUpperHandle )

            mpPane->DrawVertHandle( dc, bounds.x-1, 
                                    bounds.y, pRow->mRowWidth );
    }
}

void cbPaneDrawPlugin::DrawLowerRowHandle( cbRowInfo* pRow, wxDC& dc )
{
    wxRect& bounds = pRow->mBoundsInParent;

    // check if iter-row handles present

    if ( mpPane->IsHorizontal() )
    {
        if ( pRow->mHasLowerHandle )
        
            mpPane->DrawHorizHandle( dc, bounds.x, bounds.y + bounds.height - mpPane->mProps.mResizeHandleSize - 1, 
                                      pRow->mRowWidth );
    }
    else
    {
        if ( pRow->mHasLowerHandle )

            mpPane->DrawVertHandle( dc, bounds.x + bounds.width - mpPane->mProps.mResizeHandleSize - 1, 
                                     bounds.y, pRow->mRowWidth );
    }
}

void cbPaneDrawPlugin::OnDrawRowHandles( cbDrawRowHandlesEvent& event )
{
    // short-cuts
    cbRowInfo* pRow = event.mpRow;
    wxDC&   dc      = *event.mpDc;
    mpPane          = event.mpPane;

    // draw handles of surrounding rows first

    if ( pRow->mpPrev && pRow->mpPrev->mHasLowerHandle )

            DrawLowerRowHandle( pRow->mpPrev, dc );

    if ( pRow->mpNext && pRow->mpNext->mHasUpperHandle )

        DrawUpperRowHandle( pRow->mpNext, dc );

    // draw handles of the given row

    if ( pRow->mHasUpperHandle )
    
        DrawUpperRowHandle( pRow, dc );

    if ( pRow->mHasLowerHandle )

        DrawLowerRowHandle( pRow, dc );

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

void cbPaneDrawPlugin::OnDrawPaneBackground ( cbDrawPaneBkGroundEvent& event )
{
    wxDC& dc = *event.mpDc;
    mpPane   = event.mpPane;

    // FOR NOW:: hard-coded
    wxBrush bkBrush( mpLayout->mBorderPen.GetColour(), wxSOLID );

    dc.SetBrush( bkBrush );
    dc.SetPen( mpLayout->mNullPen );

    wxRect& bounds = mpPane->mBoundsInParent;

    if ( mpPane->mTopMargin >= 1 )
    
        dc.DrawRectangle( bounds.x, bounds.y,
                          bounds.width+1,
                          mpPane->mTopMargin + 1);


    if ( mpPane->mBottomMargin >= 1 )
    
        dc.DrawRectangle( bounds.x, 
                          bounds.y + bounds.height - mpPane->mBottomMargin,
                          bounds.width + 1,
                          mpPane->mBottomMargin + 1);


    if ( mpPane->mLeftMargin >= 1 )
    
        dc.DrawRectangle( bounds.x, 
                          bounds.y + mpPane->mTopMargin - 1,
                          mpPane->mLeftMargin + 1,
                          bounds.height - mpPane->mTopMargin - mpPane->mBottomMargin + 2);


    if ( mpPane->mRightMargin >= 1 )
    
        dc.DrawRectangle( bounds.x + bounds.width - mpPane->mRightMargin,
                          bounds.y + mpPane->mTopMargin - 1,
                          mpPane->mRightMargin + 1,
                          bounds.height - mpPane->mTopMargin - mpPane->mBottomMargin + 2);

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

void cbPaneDrawPlugin::OnDrawRowBackground ( cbDrawRowBkGroundEvent& event )
{
    // short-cuts
    cbRowInfo* pRow = event.mpRow;
    wxDC&   dc      = *event.mpDc;
    mpPane          = event.mpPane;

    // get ready
    wxRect     rowBounds    = pRow->mBoundsInParent;
    bool       isHorizontal    = event.mpPane->IsHorizontal();
    
//    int prevPos;

    if ( isHorizontal )
    {
//        prevPos = rowBounds.x;
        // include one line above and below the row
        --rowBounds.y;
        rowBounds.height += 2;

        --rowBounds.x;
        rowBounds.width  += 2;
    }
    else
    {
//        prevPos = rowBounds.y;
        // include one line above and below the row
        --rowBounds.x;
        rowBounds.width  += 2;

        --rowBounds.y;
        rowBounds.height += 2;
    }

//#define TEST_BK_ERASING

#ifdef TEST_BK_ERASING

    // DBG::
    wxBrush br0( wxColour(0,160,160), wxSOLID );
    dc.SetBrush(br0);
    dc.SetPen  ( mpLayout->mNullPen );
    dc.DrawRectangle( rowBounds.x, rowBounds.y,
                      rowBounds.width  + 1, 
                      rowBounds.height + 1  );
#endif

    wxBrush bkBrush( mpLayout->mGrayPen.GetColour(), wxSOLID );

    dc.SetPen  ( mpLayout->mNullPen );
    dc.SetBrush( bkBrush );

    // fill background-recatangle of entire row area
    dc.DrawRectangle( rowBounds.x, rowBounds.y,
                      rowBounds.width  + 1, 
                      rowBounds.height + 1  );

    dc.SetBrush( wxNullBrush );

    // draw "shaded-side-bars" for each bar
    for( size_t i = 0; i != pRow->mBars.Count(); ++i )
    {
        wxRect& bounds = pRow->mBars[i]->mBoundsInParent;

        if ( isHorizontal )
        {
            DrawShade( 1, bounds, FL_ALIGN_LEFT, dc );
            DrawShade( 1, bounds, FL_ALIGN_RIGHT, dc );
        }
        else
        {
            DrawShade( 1, bounds, FL_ALIGN_TOP, dc );
            DrawShade( 1, bounds, FL_ALIGN_BOTTOM, dc );
        }
    }

    // draw extra shades to simulate "glued-bricks" effect

    // TBD:: reduce exessive drawing of shades, when the
    //       row handle is present, and shades will be overr-drawn anyway

    DrawUpperRowShades( pRow, dc, 1 ); // outer shade

    if ( pRow->mpPrev )
    {
        DrawLowerRowShades( pRow->mpPrev, dc, 1 ); // outter shade
        DrawLowerRowShades( pRow->mpPrev, dc, 0 ); // inner shade
    }

    DrawLowerRowShades( pRow, dc, 1 );

    if ( pRow->mpNext )
    {
        DrawUpperRowShades( pRow->mpNext, dc, 1 ); 
        DrawUpperRowShades( pRow->mpNext, dc, 0 );
    }

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

void cbPaneDrawPlugin::DrawUpperRowShades( 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_TOP, dc );
            if ( level == 1 )
            {
                dc.SetPen( mpLayout->mDarkPen );
                dc.DrawPoint( bounds.x - 1, bounds.y );
                dc.SetPen( mpLayout->mLightPen );
                dc.DrawPoint( bounds.x + bounds.width , bounds.y );
            }
        }
        else
        {
            DrawShade( level, bounds, FL_ALIGN_LEFT, dc );
            if ( level == 1 )