C++ BASE_SCREEN::GetGridSize方法代码示例

void EDA_DRAW_FRAME::UseGalCanvas( bool aEnable )
{
    KIGFX::VIEW* view = GetGalCanvas()->GetView();
    KIGFX::GAL* gal = GetGalCanvas()->GetGAL();

    double zoomFactor = gal->GetWorldScale() / gal->GetZoomFactor();

    // Display the same view after canvas switching
    if( aEnable )
    {
        BASE_SCREEN* screen = GetScreen();

        // Switch to GAL rendering
        if( !IsGalCanvasActive() )
        {
            // Set up viewport
            double zoom = 1.0 / ( zoomFactor * m_canvas->GetZoom() );
            view->SetScale( zoom );
            view->SetCenter( VECTOR2D( m_canvas->GetScreenCenterLogicalPosition() ) );
        }

        // Set up grid settings
        gal->SetGridVisibility( IsGridVisible() );
        gal->SetGridSize( VECTOR2D( screen->GetGridSize().x, screen->GetGridSize().y ) );
        gal->SetGridOrigin( VECTOR2D( GetGridOrigin() ) );
    }
    else
    {
        // Switch to standard rendering
        if( IsGalCanvasActive() )
        {
            // Change view settings only if GAL was active previously
            double zoom = 1.0 / ( zoomFactor * view->GetScale() );
            m_canvas->SetZoom( zoom );

            VECTOR2D center = view->GetCenter();
            RedrawScreen( wxPoint( center.x, center.y ), false );
        }
    }

    m_canvas->SetEvtHandlerEnabled( !aEnable );
    GetGalCanvas()->SetEvtHandlerEnabled( aEnable );

    // Switch panes
    m_auimgr.GetPane( wxT( "DrawFrame" ) ).Show( !aEnable );
    m_auimgr.GetPane( wxT( "DrawFrameGal" ) ).Show( aEnable );
    m_auimgr.Update();

    // Reset current tool on switch();
    SetToolID( ID_NO_TOOL_SELECTED, wxCURSOR_DEFAULT, wxEmptyString );

    m_galCanvasActive = aEnable;
}

void PCBNEW_CONTROL::updateGrid()
{
    BASE_SCREEN* screen = m_frame->GetScreen();
    //GRID_TYPE grid = screen->GetGrid( idx );
    getView()->GetGAL()->SetGridSize( VECTOR2D( screen->GetGridSize() ) );
    getView()->MarkTargetDirty( KIGFX::TARGET_NONCACHED );
}

void EDA_DRAW_PANEL::SetClipBox( wxDC& aDC, const wxRect* aRect )
{
    wxRect clipBox;

    // Use the entire visible device area if no clip area was defined.
    if( aRect == NULL )
    {
        BASE_SCREEN* Screen = GetScreen();

        if( !Screen )
            return;

        Screen->m_StartVisu = CalcUnscrolledPosition( wxPoint( 0, 0 ) );
        clipBox.SetSize( GetClientSize() );

        int scrollX, scrollY;

        double scalar = Screen->GetScalingFactor();
        scrollX = KiROUND( Screen->GetGridSize().x * scalar );
        scrollY = KiROUND( Screen->GetGridSize().y * scalar );

        m_scrollIncrementX = std::max( GetClientSize().x / 8, scrollX );
        m_scrollIncrementY = std::max( GetClientSize().y / 8, scrollY );
        Screen->m_ScrollbarPos.x = GetScrollPos( wxHORIZONTAL );
        Screen->m_ScrollbarPos.y = GetScrollPos( wxVERTICAL );
    }
    else
    {
        clipBox = *aRect;
    }

    // Pad clip box in device units.
    clipBox.Inflate( CLIP_BOX_PADDING );

    // Convert from device units to drawing units.
    m_ClipBox.SetOrigin( wxPoint( aDC.DeviceToLogicalX( clipBox.x ),
                                  aDC.DeviceToLogicalY( clipBox.y ) ) );
    m_ClipBox.SetSize( wxSize( aDC.DeviceToLogicalXRel( clipBox.width ),
                               aDC.DeviceToLogicalYRel( clipBox.height ) ) );

    wxLogTrace( kicadTraceCoords,
                wxT( "Device clip box=(%d, %d, %d, %d), Logical clip box=(%d, %d, %d, %d)" ),
                clipBox.x, clipBox.y, clipBox.width, clipBox.height,
                m_ClipBox.GetX(), m_ClipBox.GetY(), m_ClipBox.GetWidth(), m_ClipBox.GetHeight() );
}

/* Move selected sheet with the cursor.
 * Callback function use by m_mouseCaptureCallback.
 */
static void MoveOrResizeSheet( EDA_DRAW_PANEL* aPanel, wxDC* aDC, const wxPoint& aPosition,
                               bool aErase )
{
    wxPoint        moveVector;
    BASE_SCREEN*   screen = aPanel->GetScreen();
    SCH_SHEET*     sheet = (SCH_SHEET*) screen->GetCurItem();

    if( aErase )
        sheet->Draw( aPanel, aDC, wxPoint( 0, 0 ), g_XorMode );

    wxPoint pos = sheet->GetPosition();

    if( sheet->IsResized() )
    {
        int width  = aPanel->GetParent()->GetCrossHairPosition().x - sheet->GetPosition().x;
        int height = aPanel->GetParent()->GetCrossHairPosition().y - sheet->GetPosition().y;

        // If the sheet doesn't have any pins, clamp the minimum size to the default values.
        width = ( width < MIN_SHEET_WIDTH ) ? MIN_SHEET_WIDTH : width;
        height = ( height < MIN_SHEET_HEIGHT ) ? MIN_SHEET_HEIGHT : height;

        if( sheet->HasPins() )
        {
            int gridSizeX = KiROUND( screen->GetGridSize().x );
            int gridSizeY = KiROUND( screen->GetGridSize().y );

            // If the sheet has pins, use the pin positions to clamp the minimum height.
            height = ( height < sheet->GetMinHeight() + gridSizeY ) ?
                     sheet->GetMinHeight() + gridSizeY : height;
            width = ( width < sheet->GetMinWidth() + gridSizeX ) ?
                    sheet->GetMinWidth() + gridSizeX : width;
        }

        wxPoint grid = aPanel->GetParent()->GetNearestGridPosition(
                        wxPoint( pos.x + width, pos.y + height ) );
        sheet->Resize( wxSize( grid.x - pos.x, grid.y - pos.y ) );
    }
    else if( sheet->IsMoving() )
    {
        moveVector = aPanel->GetParent()->GetCrossHairPosition() - pos;
        sheet->Move( moveVector );
    }

    sheet->Draw( aPanel, aDC, wxPoint( 0, 0 ), g_XorMode );
}

void EDA_DRAW_PANEL::DrawGrid( wxDC* aDC )
{
    #define MIN_GRID_SIZE 10        // min grid size in pixels to allow drawing
    BASE_SCREEN* screen = GetScreen();
    wxRealPoint  gridSize;
    wxSize       screenSize;
    wxPoint      org;
    wxRealPoint  screenGridSize;

    /* The grid must be visible. this is possible only is grid value
     * and zoom value are sufficient
     */
    gridSize = screen->GetGridSize();
    screen->m_StartVisu = CalcUnscrolledPosition( wxPoint( 0, 0 ) );
    screenSize = GetClientSize();

    screenGridSize.x = aDC->LogicalToDeviceXRel( KiROUND( gridSize.x ) );
    screenGridSize.y = aDC->LogicalToDeviceYRel( KiROUND( gridSize.y ) );

    org = m_ClipBox.GetPosition();

    if( screenGridSize.x < MIN_GRID_SIZE || screenGridSize.y < MIN_GRID_SIZE )
    {
        screenGridSize.x *= 2.0;
        screenGridSize.y *= 2.0;
        gridSize.x *= 2.0;
        gridSize.y *= 2.0;
    }

    if( screenGridSize.x < MIN_GRID_SIZE || screenGridSize.y < MIN_GRID_SIZE )
        return;

    org = GetParent()->GetNearestGridPosition( org, &gridSize );

    // Setting the nearest grid position can select grid points outside the clip box.
    // Incrementing the start point by one grid step should prevent drawing grid points
    // outside the clip box.
    if( org.x < m_ClipBox.GetX() )
        org.x += KiROUND( gridSize.x );

    if( org.y < m_ClipBox.GetY() )
        org.y += KiROUND( gridSize.y );

    // Use a pixel based draw to display grid.  There are a lot of calls, so the cost is
    // high and grid is slowly drawn on some platforms. Another way using blit transfert was used,
    // a long time ago, but it did not give very good results.
    // The better way is highly dependent on the platform and the graphic card.
    int xpos;
    double right = ( double ) m_ClipBox.GetRight();
    double bottom = ( double ) m_ClipBox.GetBottom();

#if defined( USE_WX_GRAPHICS_CONTEXT )
    wxGCDC *gcdc = wxDynamicCast( aDC, wxGCDC );

    if( gcdc )
    {
        // Much faster grid drawing on systems using wxGraphicsContext
        wxGraphicsContext *gc = gcdc->GetGraphicsContext();

        // Grid point size
        const int gsz = 1;
        const double w = aDC->DeviceToLogicalXRel( gsz );
        const double h = aDC->DeviceToLogicalYRel( gsz );

        // Use our own pen
        wxPen pen( GetParent()->GetGridColor().ToColour(), h );
        pen.SetCap( wxCAP_BUTT );
        gc->SetPen( pen );

        // draw grid
        wxGraphicsPath path = gc->CreatePath();
        for( double x = (double) org.x - w/2.0; x <= right - w/2.0; x += gridSize.x )
        {
            for( double y = (double) org.y; y <= bottom; y += gridSize.y )
            {
                path.MoveToPoint( x, y );
                path.AddLineToPoint( x+w, y );
            }
        }
        gc->StrokePath( path );
    }
    else
#endif
    {
        GRSetColorPen( aDC, GetParent()->GetGridColor() );

        for( double x = (double) org.x; x <= right; x += gridSize.x )
        {
            xpos = KiROUND( x );

            for( double y = (double) org.y; y <= bottom; y += gridSize.y )
            {
                aDC->DrawPoint( xpos, KiROUND( y )  );
            }
        }
    }
}

void EDA_DRAW_PANEL::DrawGrid( wxDC* aDC )
{
    #define MIN_GRID_SIZE 10        // min grid size in pixels to allow drawing
    BASE_SCREEN* screen = GetScreen();
    wxRealPoint  gridSize;
    wxSize       screenSize;
    wxPoint      org;
    wxRealPoint  screenGridSize;

    /* The grid must be visible. this is possible only is grid value
     * and zoom value are sufficient
     */
    gridSize = screen->GetGridSize();
    screen->m_StartVisu = CalcUnscrolledPosition( wxPoint( 0, 0 ) );
    screenSize = GetClientSize();

    screenGridSize.x = aDC->LogicalToDeviceXRel( KiROUND( gridSize.x ) );
    screenGridSize.y = aDC->LogicalToDeviceYRel( KiROUND( gridSize.y ) );

    org = m_ClipBox.GetPosition();

    if( screenGridSize.x < MIN_GRID_SIZE || screenGridSize.y < MIN_GRID_SIZE )
    {
        screenGridSize.x *= 2.0;
        screenGridSize.y *= 2.0;
        gridSize.x *= 2.0;
        gridSize.y *= 2.0;
    }

    if( screenGridSize.x < MIN_GRID_SIZE || screenGridSize.y < MIN_GRID_SIZE )
        return;

    org = GetParent()->GetNearestGridPosition( org, &gridSize );

    // Setting the nearest grid position can select grid points outside the clip box.
    // Incrementing the start point by one grid step should prevent drawing grid points
    // outside the clip box.
    if( org.x < m_ClipBox.GetX() )
        org.x += KiROUND( gridSize.x );

    if( org.y < m_ClipBox.GetY() )
        org.y += KiROUND( gridSize.y );

#if ( defined( __WXMAC__ ) || 1 )
    // Use a pixel based draw to display grid.  There are a lot of calls, so the cost is
    // high and grid is slowly drawn on some platforms.  Please note that this should
    // always be enabled until the bitmap based solution below is fixed.
#ifndef __WXMAC__
    GRSetColorPen( aDC, GetParent()->GetGridColor() );
#else
    // On mac (Cocoa), a point isn't a pixel and being of size 1 don't survive to antialiasing
    GRSetColorPen( aDC, GetParent()->GetGridColor(), aDC->DeviceToLogicalXRel(2) );
#endif

    int xpos;
    double right = ( double ) m_ClipBox.GetRight();
    double bottom = ( double ) m_ClipBox.GetBottom();

    for( double x = (double) org.x; x <= right; x += gridSize.x )
    {
        xpos = KiROUND( x );

        for( double y = (double) org.y; y <= bottom; y += gridSize.y )
        {
            aDC->DrawPoint( xpos, KiROUND( y )  );
        }
    }
#else
    /* This is fast only if the Blit function is fast.  Not true on all platforms.
     *
     * A first grid column is drawn in a temporary bitmap, and after is duplicated using
     * the Blit function (copy from a screen area to an other screen area).
     */
    wxMemoryDC tmpDC;
    wxBitmap tmpBM( 1, aDC->LogicalToDeviceYRel( m_ClipBox.GetHeight() ) );
    tmpDC.SelectObject( tmpBM );
    tmpDC.SetLogicalFunction( wxCOPY );
    tmpDC.SetBackground( wxBrush( GetBackgroundColour() ) );
    tmpDC.Clear();
    tmpDC.SetPen( MakeColour( GetParent()->GetGridColor() ) );

    double usx, usy;
    int lox, loy, dox, doy;

    aDC->GetUserScale( &usx, &usy );
    aDC->GetLogicalOrigin( &lox, &loy );
    aDC->GetDeviceOrigin( &dox, &doy );

    // Create a dummy DC for coordinate translation because the actual DC scale and origin
    // must be reset in order to work correctly.
    wxBitmap tmpBitmap( 1, 1 );
    wxMemoryDC scaleDC( tmpBitmap );
    scaleDC.SetUserScale( usx, usy );
    scaleDC.SetLogicalOrigin( lox, loy );
    scaleDC.SetDeviceOrigin( dox, doy );

    double bottom = ( double ) m_ClipBox.GetBottom();

    // Draw a column of grid points.
    for( double y = (double) org.y; y <= bottom; y += gridSize.y )
//.........这里部分代码省略.........