C++ VIEW::GetCenter方法代码示例

int PCBNEW_CONTROL::PanControl( const TOOL_EVENT& aEvent )
{
    long type = aEvent.Parameter<long>();
    KIGFX::VIEW* view = getView();
    GRID_HELPER gridHelper( m_frame );
    VECTOR2D center = view->GetCenter();
    VECTOR2I gridSize = gridHelper.GetGrid() * 10;

    switch( type )
    {
        case COMMON_ACTIONS::CURSOR_UP:
            center -= VECTOR2D( 0, gridSize.y );
            break;

        case COMMON_ACTIONS::CURSOR_DOWN:
            center += VECTOR2D( 0, gridSize.y );
            break;

        case COMMON_ACTIONS::CURSOR_LEFT:
            center -= VECTOR2D( gridSize.x, 0 );
            break;

        case COMMON_ACTIONS::CURSOR_RIGHT:
            center += VECTOR2D( gridSize.x, 0 );
            break;

        default:
            assert( false );
            break;
    }

    view->SetCenter( center );

    return 0;
}

int PCBNEW_CONTROL::ZoomFitScreen( const TOOL_EVENT& aEvent )
{
    KIGFX::VIEW* view = getView();
    EDA_DRAW_PANEL_GAL* galCanvas = m_frame->GetGalCanvas();
    BOARD* board = getModel<BOARD>();
    board->ComputeBoundingBox();

    BOX2I boardBBox = board->ViewBBox();
    VECTOR2D scrollbarSize = VECTOR2D( galCanvas->GetSize() - galCanvas->GetClientSize() );
    VECTOR2D screenSize = view->ToWorld( galCanvas->GetClientSize(), false );

    if( boardBBox.GetWidth() == 0 || boardBBox.GetHeight() == 0 )
    {
        // Empty view
        view->SetScale( 17.0 );     // works fine for the standard worksheet frame

        view->SetCenter( screenSize / 2.0 );
    }
    else
    {
        VECTOR2D vsize = boardBBox.GetSize();
        double scale = view->GetScale() / std::max( fabs( vsize.x / screenSize.x ),
                                                    fabs( vsize.y / screenSize.y ) );

        view->SetScale( scale );
        view->SetCenter( boardBBox.Centre() );
    }


    // Take scrollbars into account
    VECTOR2D worldScrollbarSize = view->ToWorld( scrollbarSize, false );
    view->SetCenter( view->GetCenter() + worldScrollbarSize / 2.0 );

    return 0;
}

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

    // Display the same view after canvas switching
    if( aEnable )
    {
        // Switch to GAL renderer from legacy
        if( !m_galCanvasActive )
        {
            // Set up viewport
            double zoomFactor = gal->GetWorldScale() / gal->GetZoomFactor();
            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( GetScreen()->GetGridSize() ) );
        gal->SetGridOrigin( VECTOR2D( GetGridOrigin() ) );

        // Transfer EDA_DRAW_PANEL settings
        GetGalCanvas()->GetViewControls()->EnableCursorWarping( !m_canvas->GetEnableZoomNoCenter() );
        GetGalCanvas()->GetViewControls()->EnableMousewheelPan( m_canvas->GetEnableMousewheelPan() );
        GetGalCanvas()->GetViewControls()->EnableAutoPan( m_canvas->GetEnableAutoPan() );
    }
    else if( m_galCanvasActive )
    {
        // Switch to legacy renderer from GAL
        double zoomFactor = gal->GetWorldScale() / gal->GetZoomFactor();
        // TODO replace it with EDA_DRAW_PANEL_GAL::GetLegacyZoom
        m_canvas->SetZoom( 1.0 / ( zoomFactor * view->GetScale() ) );
        VECTOR2D center = view->GetCenter();
        AdjustScrollBars( wxPoint( center.x, center.y ) );
    }

    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();
    SetNoToolSelected();

    m_galCanvasActive = aEnable;
}

// Cursor control
int PCBNEW_CONTROL::CursorControl( const TOOL_EVENT& aEvent )
{
    long type = aEvent.Parameter<long>();
    bool fastMove = type & COMMON_ACTIONS::CURSOR_FAST_MOVE;
    type &= ~COMMON_ACTIONS::CURSOR_FAST_MOVE;

    GRID_HELPER gridHelper( m_frame );
    VECTOR2D cursor = getViewControls()->GetCursorPosition();
    VECTOR2I gridSize = gridHelper.GetGrid();
    VECTOR2D newCursor = gridHelper.Align( cursor );

    if( fastMove )
        gridSize = gridSize * 10;

    switch( type )
    {
        case COMMON_ACTIONS::CURSOR_UP:
            newCursor -= VECTOR2D( 0, gridSize.y );
            break;

        case COMMON_ACTIONS::CURSOR_DOWN:
            newCursor += VECTOR2D( 0, gridSize.y );
            break;

        case COMMON_ACTIONS::CURSOR_LEFT:
            newCursor -= VECTOR2D( gridSize.x, 0 );
            break;

        case COMMON_ACTIONS::CURSOR_RIGHT:
            newCursor += VECTOR2D( gridSize.x, 0 );
            break;

        case COMMON_ACTIONS::CURSOR_CLICK:              // fall through
        case COMMON_ACTIONS::CURSOR_DBL_CLICK:
        {
            TOOL_ACTIONS action = TA_NONE;
            int modifiers = 0;

            modifiers |= wxGetKeyState( WXK_SHIFT ) ? MD_SHIFT : 0;
            modifiers |= wxGetKeyState( WXK_CONTROL ) ? MD_CTRL : 0;
            modifiers |= wxGetKeyState( WXK_ALT ) ? MD_ALT : 0;

            if( type == COMMON_ACTIONS::CURSOR_CLICK )
                action = TA_MOUSE_CLICK;
            else if( type == COMMON_ACTIONS::CURSOR_DBL_CLICK )
                action = TA_MOUSE_DBLCLICK;
            else
                assert( false );

            TOOL_EVENT evt( TC_MOUSE, action, BUT_LEFT | modifiers );
            evt.SetMousePosition( getViewControls()->GetCursorPosition() );
            m_toolMgr->ProcessEvent( evt );

            return 0;
        }
        break;
    }

    // Handler cursor movement
    KIGFX::VIEW* view = getView();
    newCursor = view->ToScreen( newCursor );
    newCursor.x = KiROUND( newCursor.x );
    newCursor.y = KiROUND( newCursor.y );

    // Pan the screen if required
    const VECTOR2I& screenSize = view->GetGAL()->GetScreenPixelSize();
    BOX2I screenBox( VECTOR2I( 0, 0 ), screenSize );

    if( !screenBox.Contains( newCursor ) )
    {
        VECTOR2D delta( 0, 0 );

        if( newCursor.x < screenBox.GetLeft() )
        {
            delta.x = newCursor.x - screenBox.GetLeft();
            newCursor.x = screenBox.GetLeft();
        }
        else if( newCursor.x > screenBox.GetRight() )
        {
            delta.x = newCursor.x - screenBox.GetRight();
            // -1 is to keep the cursor within the drawing area,
            // so the cursor coordinates are still updated
            newCursor.x = screenBox.GetRight() - 1;
        }

        if( newCursor.y < screenBox.GetTop() )
        {
            delta.y = newCursor.y - screenBox.GetTop();
            newCursor.y = screenBox.GetTop();
        }
        else if( newCursor.y > screenBox.GetBottom() )
        {
            delta.y = newCursor.y - screenBox.GetBottom();
            // -1 is to keep the cursor within the drawing area,
            // so the cursor coordinates are still updated
            newCursor.y = screenBox.GetBottom() - 1;
        }

        view->SetCenter( view->GetCenter() + view->ToWorld( delta, false ) );
//.........这里部分代码省略.........