C++ BASE_SCREEN::GetScalingFactor方法代码示例

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() );
}

void EDA_DRAW_FRAME::AdjustScrollBars( const wxPoint& aCenterPositionIU )
{
    BASE_SCREEN* screen = GetScreen();

    if( !screen || !m_canvas )
        return;

    double scale = screen->GetScalingFactor();

    wxLogTrace( traceScrollSettings, wxT( "Center Position = ( %d, %d ), scale = %.10g" ),
                aCenterPositionIU.x, aCenterPositionIU.y, scale );

    // Calculate the portion of the drawing that can be displayed in the
    // client area at the current zoom level.

    // visible viewport in device units ~ pixels
    wxSize  clientSizeDU = m_canvas->GetClientSize();

    // Size of the client window in IU
    DSIZE   clientSizeIU( clientSizeDU.x / scale, clientSizeDU.y / scale );

    // Full drawing or "page" rectangle in internal units
    DBOX    pageRectIU( wxPoint( 0, 0 ), wxSize( GetPageSizeIU().x, GetPageSizeIU().y ) );

    // The upper left corner of the client rectangle in internal units.
    double xIU = aCenterPositionIU.x - clientSizeIU.x / 2.0;
    double yIU = aCenterPositionIU.y - clientSizeIU.y / 2.0;

    // If drawn around the center, adjust the client rectangle accordingly.
    if( screen->m_Center )
    {
        // half page offset.
        xIU += pageRectIU.GetWidth()  / 2.0;
        yIU += pageRectIU.GetHeight() / 2.0;
    }

    DBOX    clientRectIU( wxPoint( xIU, yIU ), wxSize( clientSizeIU.x, clientSizeIU.y ) );
    wxPoint centerPositionIU;

    // put "int" limits on the clientRect
    if( clientRectIU.GetLeft() < VIRT_MIN )
        clientRectIU.MoveLeftTo( VIRT_MIN );
    if( clientRectIU.GetTop() < VIRT_MIN )
        clientRectIU.MoveTopTo( VIRT_MIN );
    if( clientRectIU.GetRight() > VIRT_MAX )
        clientRectIU.MoveRightTo( VIRT_MAX );
    if( clientRectIU.GetBottom() > VIRT_MAX )
        clientRectIU.MoveBottomTo( VIRT_MAX );

    centerPositionIU.x = KiROUND( clientRectIU.GetX() + clientRectIU.GetWidth() / 2 );
    centerPositionIU.y = KiROUND( clientRectIU.GetY() + clientRectIU.GetHeight() / 2 );

    if( screen->m_Center )
    {
        centerPositionIU.x -= KiROUND( pageRectIU.GetWidth() / 2.0 );
        centerPositionIU.y -= KiROUND( pageRectIU.GetHeight() / 2.0 );
    }

    DSIZE   virtualSizeIU;

    if( pageRectIU.GetLeft() < clientRectIU.GetLeft() && pageRectIU.GetRight() > clientRectIU.GetRight() )
    {
        virtualSizeIU.x = pageRectIU.GetSize().x;
    }
    else
    {
        double pageCenterX    = pageRectIU.GetX()   + ( pageRectIU.GetWidth() / 2 );
        double clientCenterX  = clientRectIU.GetX() + ( clientRectIU.GetWidth() / 2 );

        if( clientRectIU.GetWidth() > pageRectIU.GetWidth() )
        {
            if( pageCenterX > clientCenterX )
                virtualSizeIU.x = ( pageCenterX - clientRectIU.GetLeft() ) * 2;
            else if( pageCenterX < clientCenterX )
                virtualSizeIU.x = ( clientRectIU.GetRight() - pageCenterX ) * 2;
            else
                virtualSizeIU.x = clientRectIU.GetWidth();
        }
        else
        {
            if( pageCenterX > clientCenterX )
                virtualSizeIU.x = pageRectIU.GetWidth() + ( (pageRectIU.GetLeft() - clientRectIU.GetLeft() ) * 2 );
            else if( pageCenterX < clientCenterX )
                virtualSizeIU.x = pageRectIU.GetWidth() + ( (clientRectIU.GetRight() - pageRectIU.GetRight() ) * 2 );
            else
                virtualSizeIU.x = pageRectIU.GetWidth();
        }
    }

    if( pageRectIU.GetTop() < clientRectIU.GetTop() && pageRectIU.GetBottom() > clientRectIU.GetBottom() )
    {
        virtualSizeIU.y = pageRectIU.GetSize().y;
    }
    else
    {
        double pageCenterY   = pageRectIU.GetY()   + ( pageRectIU.GetHeight() / 2 );
        double clientCenterY = clientRectIU.GetY() + ( clientRectIU.GetHeight() / 2 );

        if( clientRectIU.GetHeight() > pageRectIU.GetHeight() )
        {
//.........这里部分代码省略.........