void EDA_DRAW_FRAME::OnToggleCrossHairStyle( wxCommandEvent& aEvent )
{
    INSTALL_UNBUFFERED_DC( dc, m_canvas );
    m_canvas->CrossHairOff( &dc );
    m_cursorShape = !m_cursorShape;
    m_canvas->CrossHairOn( &dc );
}

void EDA_DRAW_PANEL::OnMouseLeaving( wxMouseEvent& event )
{
    if( m_mouseCaptureCallback == NULL )          // No command in progress.
        m_requestAutoPan = false;

    if( !m_enableAutoPan || !m_requestAutoPan || m_ignoreMouseEvents )
        return;

    // Auto pan when mouse has left the client window
    // Ensure the cross_hair position is updated,
    // because it will be used to center the screen.
    // We use a position inside the client window
    wxSize size = GetClientSize();
    wxPoint cross_hair_pos = event.GetPosition();
    cross_hair_pos.x = std::min( cross_hair_pos.x, size.x );
    cross_hair_pos.y = std::min( cross_hair_pos.y, size.x );
    cross_hair_pos.x = std::max( cross_hair_pos.x, 0 );
    cross_hair_pos.y = std::max( cross_hair_pos.y, 0 );

    INSTALL_UNBUFFERED_DC( dc, this );
    cross_hair_pos.x = dc.DeviceToLogicalX( cross_hair_pos.x );
    cross_hair_pos.y = dc.DeviceToLogicalY( cross_hair_pos.y );

    GetParent()->SetCrossHairPosition( cross_hair_pos );

    wxCommandEvent cmd( wxEVT_COMMAND_MENU_SELECTED, ID_POPUP_ZOOM_CENTER );
    cmd.SetEventObject( this );
    GetEventHandler()->ProcessEvent( cmd );

    event.Skip();
}

void EDA_DRAW_PANEL::OnKeyEvent( wxKeyEvent& event )
{
    int localkey;
    wxPoint pos;

    localkey = event.GetKeyCode();

    switch( localkey )
    {
    default:
        break;

    case WXK_ESCAPE:
        m_abortRequest = true;

        if( IsMouseCaptured() )
            EndMouseCapture();
        else
            EndMouseCapture( ID_NO_TOOL_SELECTED, m_defaultCursor, wxEmptyString );
        break;
    }

    /* Normalize keys code to easily handle keys from Ctrl+A to Ctrl+Z
     * They have an ascii code from 1 to 27 remapped
     * to GR_KB_CTRL + 'A' to GR_KB_CTRL + 'Z'
     */
    if( event.ControlDown() && localkey >= WXK_CONTROL_A && localkey <= WXK_CONTROL_Z )
        localkey += 'A' - 1;

    /* Disallow shift for keys that have two keycodes on them (e.g. number and
     * punctuation keys) leaving only the "letter keys" of A-Z.
     * Then, you can have, e.g. Ctrl-5 and Ctrl-% (GB layout)
     * and Ctrl-( and Ctrl-5 (FR layout).
     * Otherwise, you'd have to have to say Ctrl-Shift-5 on a FR layout
     */
    bool keyIsLetter = ( localkey >= 'A' && localkey <= 'Z' ) ||
                       ( localkey >= 'a' && localkey <= 'z' );

    if( event.ShiftDown() && ( keyIsLetter || localkey > 256 ) )
        localkey |= GR_KB_SHIFT;

    if( event.ControlDown() )
        localkey |= GR_KB_CTRL;

    if( event.AltDown() )
        localkey |= GR_KB_ALT;

    INSTALL_UNBUFFERED_DC( DC, this );

    // Some key commands use the current mouse position: refresh it.
    pos = wxGetMousePosition() - GetScreenPosition();

    // Compute the cursor position in drawing units.  Also known as logical units to wxDC.
    pos = wxPoint( DC.DeviceToLogicalX( pos.x ), DC.DeviceToLogicalY( pos.y ) );

    GetParent()->SetMousePosition( pos );

    if( !GetParent()->GeneralControl( &DC, pos, localkey ) )
        event.Skip();
}

wxPoint EDA_DRAW_PANEL::ToLogicalXY( const wxPoint& pos )
{
    wxPoint ret;
    INSTALL_UNBUFFERED_DC( dc, this );
    ret.x = dc.DeviceToLogicalX( pos.x );
    ret.y = dc.DeviceToLogicalY( pos.y );
    return ret;
}

void SCH_EDIT_FRAME::OnSelectUnit( wxCommandEvent& aEvent )
{
    SCH_SCREEN* screen = GetScreen();
    SCH_ITEM*   item = screen->GetCurItem();

    wxCHECK_RET( item != NULL && item->Type() == SCH_COMPONENT_T,
                 wxT( "Cannot select unit of invalid schematic item." ) );

    INSTALL_UNBUFFERED_DC( dc, m_canvas );

    m_canvas->MoveCursorToCrossHair();

    SCH_COMPONENT* component = (SCH_COMPONENT*) item;

    int unit = aEvent.GetId() + 1 - ID_POPUP_SCH_SELECT_UNIT1;

    LIB_PART* part = GetLibPart( component->GetLibId() );

    if( !part )
        return;

    int unitCount = part->GetUnitCount();

    wxCHECK_RET( (unit >= 1) && (unit <= unitCount),
                 wxString::Format( wxT( "Cannot select unit %d from component " ), unit ) +
                 part->GetName() );

    if( unitCount <= 1 || component->GetUnit() == unit )
        return;

    if( unit > unitCount )
        unit = unitCount;

    STATUS_FLAGS flags = component->GetFlags();

    if( !flags )    // No command in progress: save in undo list
        SaveCopyInUndoList( component, UR_CHANGED );

    if( flags )
        component->Draw( m_canvas, &dc, wxPoint( 0, 0 ), g_XorMode, g_GhostColor );
    else
        component->Draw( m_canvas, &dc, wxPoint( 0, 0 ), g_XorMode );

    /* Update the unit number. */
    component->SetUnitSelection( m_CurrentSheet, unit );
    component->SetUnit( unit );
    component->ClearFlags();
    component->SetFlags( flags );   // Restore m_Flag modified by SetUnit()

    if( m_autoplaceFields )
        component->AutoAutoplaceFields( GetScreen() );

    if( screen->TestDanglingEnds() )
        m_canvas->Refresh();

    OnModify();
}

void EDA_DRAW_FRAME::OnToggleCrossHairStyle( wxCommandEvent& aEvent )
{
    INSTALL_UNBUFFERED_DC( dc, m_canvas );
    m_canvas->CrossHairOff( &dc );

    auto& galOpts = GetGalDisplayOptions();
    galOpts.m_fullscreenCursor = !galOpts.m_fullscreenCursor;
    galOpts.NotifyChanged();

    m_canvas->CrossHairOn( &dc );
}

void LIB_EDIT_FRAME::OnCreateNewPartFromExisting( wxCommandEvent& event )
{
    wxCHECK_RET( m_component != NULL,
                 wxT( "Cannot create new part from non-existent current part." ) );

    INSTALL_UNBUFFERED_DC( dc, m_canvas );
    m_canvas->CrossHairOff( &dc );
    EditField( &m_component->GetValueField() );
    m_canvas->MoveCursorToCrossHair();
    m_canvas->CrossHairOn( &dc );
}

void EDA_DRAW_PANEL::MoveCursor( const wxPoint& aPosition )
{
    if( GetParent()->IsGalCanvasActive() )
        return;

    int     x, y, xPpu, yPpu;
    wxPoint screenPos, drawingPos;
    wxRect  clientRect( wxPoint( 0, 0 ), GetClientSize() );

    INSTALL_UNBUFFERED_DC( dc, this );
    screenPos.x = dc.LogicalToDeviceX( aPosition.x );
    screenPos.y = dc.LogicalToDeviceY( aPosition.y );

    // Scroll if the requested mouse position cursor is outside the drawing area.
    if( !clientRect.Contains( screenPos ) )
    {
        GetViewStart( &x, &y );
        GetScrollPixelsPerUnit( &xPpu, &yPpu );
        CalcUnscrolledPosition( screenPos.x, screenPos.y, &drawingPos.x, &drawingPos.y );

        wxLogTrace( kicadTraceCoords,
                    wxT( "MoveCursor() initial screen position(%d, %d) " ) \
                    wxT( "rectangle(%d, %d, %d, %d) view(%d, %d)" ),
                    screenPos.x, screenPos.y, clientRect.x, clientRect.y,
                    clientRect.width, clientRect.height, x, y );

        if( screenPos.y < clientRect.GetTop() )
            y -= m_scrollIncrementY * yPpu;
        else if( screenPos.y > clientRect.GetBottom() )
            y += m_scrollIncrementY * yPpu;
        else if( clientRect.GetRight() < screenPos.x )
            x += m_scrollIncrementX * xPpu;
        else
            x -= m_scrollIncrementX * xPpu;

        Scroll( x, y );
        CalcScrolledPosition( drawingPos.x, drawingPos.y, &screenPos.x, &screenPos.y );

        wxLogTrace( kicadTraceCoords,
                    wxT( "MoveCursor() scrolled screen position(%d, %d) view(%d, %d)" ),
                    screenPos.x, screenPos.y, x, y );
    }

    WarpPointer( screenPos.x, screenPos.y );
}

void SCH_EDIT_FRAME::OnCopySchematicItemRequest( wxCommandEvent& event )
{
    SCH_ITEM * curr_item = GetScreen()->GetCurItem();

    if( !curr_item || curr_item->GetFlags() )
        return;

    INSTALL_UNBUFFERED_DC( dc, m_canvas );

    switch( curr_item->Type() )
    {
    case SCH_COMPONENT_T:
    {
        SCH_COMPONENT* newitem;
        newitem = new SCH_COMPONENT( *( (SCH_COMPONENT*) curr_item ) );
        newitem->SetTimeStamp( GetNewTimeStamp() );
        newitem->ClearAnnotation( NULL );
        newitem->SetFlags( IS_NEW );
        // Draw the new part, MoveItem() expects it to be already on screen.
        newitem->Draw( m_canvas, &dc, wxPoint( 0, 0 ), g_XorMode );
        PrepareMoveItem( newitem, &dc );
    }
    break;

    case SCH_TEXT_T:
    case SCH_LABEL_T:
    case SCH_GLOBAL_LABEL_T:
    case SCH_HIERARCHICAL_LABEL_T:
    {
        SCH_TEXT* newitem = (SCH_TEXT*) curr_item->Clone();
        newitem->SetFlags( IS_NEW );
        // Draw the new item, MoveItem() expects it to be already on screen.
        newitem->Draw( m_canvas, &dc, wxPoint( 0, 0 ), g_XorMode );
        PrepareMoveItem( newitem, &dc );
    }
        break;

    default:
        break;
    }
}

bool EDA_DRAW_PANEL::OnRightClick( wxMouseEvent& event )
{
    wxPoint pos;
    wxMenu  MasterMenu;

    INSTALL_UNBUFFERED_DC( dc, this );

    pos = event.GetLogicalPosition( dc );

    if( !GetParent()->OnRightClick( pos, &MasterMenu ) )
        return false;

    GetParent()->AddMenuZoomAndGrid( &MasterMenu );

    pos = event.GetPosition();
    m_ignoreMouseEvents = true;
    PopupMenu( &MasterMenu, pos );
    MoveCursorToCrossHair();
    m_ignoreMouseEvents = false;

    return true;
}

void LIB_EDIT_FRAME::OnOrient( wxCommandEvent& aEvent )
{
    INSTALL_UNBUFFERED_DC( dc, m_canvas );
    SCH_SCREEN* screen = GetScreen();
    // Allows block rotate operation on hot key.
    if( screen->m_BlockLocate.GetState() != STATE_NO_BLOCK )
    {
        if( aEvent.GetId() == ID_LIBEDIT_MIRROR_X )
        {
            m_canvas->MoveCursorToCrossHair();
            screen->m_BlockLocate.SetMessageBlock( this );
            screen->m_BlockLocate.SetCommand( BLOCK_MIRROR_X );
            HandleBlockEnd( &dc );
        }
        else if( aEvent.GetId() == ID_LIBEDIT_MIRROR_Y )
        {
            m_canvas->MoveCursorToCrossHair();
            screen->m_BlockLocate.SetMessageBlock( this );
            screen->m_BlockLocate.SetCommand( BLOCK_MIRROR_Y );
            HandleBlockEnd( &dc );
        }
    }
}

void PCB_BASE_FRAME::CursorGoto( const wxPoint& aPos, bool aWarp )
{
    // factored out of pcbnew/find.cpp

    INSTALL_UNBUFFERED_DC( dc, m_canvas );

    // There may be need to reframe the drawing.
    if( !m_canvas->IsPointOnDisplay( aPos ) )
    {
        SetCrossHairPosition( aPos );
        RedrawScreen( aPos, aWarp );
    }
    else
    {
        // Put cursor on item position
        m_canvas->CrossHairOff( &dc );
        SetCrossHairPosition( aPos );

        if( aWarp )
            m_canvas->MoveCursorToCrossHair();
    }
    m_canvas->CrossHairOn( &dc );
    m_canvas->CrossHairOn( &dc );
}

void SCH_EDIT_FRAME::Process_Special_Functions( wxCommandEvent& event )
{
    int         id = event.GetId();
    wxPoint     pos;
    SCH_SCREEN* screen = GetScreen();
    SCH_ITEM*   item = screen->GetCurItem();

    pos = wxGetMousePosition();

    pos.y += 20;

    // If needed, stop the current command and deselect current tool
    switch( id )
    {
    case wxID_CUT:
    case wxID_COPY:
    case ID_POPUP_CANCEL_CURRENT_COMMAND:
    case ID_POPUP_SCH_ENTRY_SELECT_SLASH:
    case ID_POPUP_SCH_ENTRY_SELECT_ANTISLASH:
    case ID_POPUP_SCH_BEGIN_WIRE:
    case ID_POPUP_SCH_BEGIN_BUS:
    case ID_POPUP_END_LINE:
    case ID_POPUP_SCH_SET_SHAPE_TEXT:
    case ID_POPUP_SCH_CLEANUP_SHEET:
    case ID_POPUP_SCH_END_SHEET:
    case ID_POPUP_SCH_RESIZE_SHEET:
    case ID_POPUP_IMPORT_GLABEL:
    case ID_POPUP_SCH_INIT_CMP:
    case ID_POPUP_SCH_DISPLAYDOC_CMP:
    case ID_POPUP_SCH_EDIT_CONVERT_CMP:
    case ID_POPUP_DELETE_BLOCK:
    case ID_POPUP_PLACE_BLOCK:
    case ID_POPUP_ZOOM_BLOCK:
    case ID_POPUP_DRAG_BLOCK:
    case ID_POPUP_COPY_BLOCK:
    case ID_POPUP_SCH_DELETE_NODE:
    case ID_POPUP_SCH_DELETE_CONNECTION:
    case ID_POPUP_SCH_ENTER_SHEET:
    case ID_POPUP_SCH_LEAVE_SHEET:
    case ID_POPUP_SCH_ADD_JUNCTION:
    case ID_POPUP_SCH_ADD_LABEL:
    case ID_POPUP_SCH_GETINFO_MARKER:

        /* At this point: Do nothing. these commands do not need to stop the
         * current command (mainly a block command) or reset the current state
         * They will be executed later, in next switch structure.
         */
        break;

    case ID_POPUP_SCH_DELETE_CMP:
    case ID_POPUP_SCH_DELETE:

        // Stop the current command (if any) but keep the current tool
        m_canvas->EndMouseCapture();
        break;

    default:

        // Stop the current command and deselect the current tool
        m_canvas->EndMouseCapture( ID_NO_TOOL_SELECTED, m_canvas->GetDefaultCursor() );
        break;
    }

    INSTALL_UNBUFFERED_DC( dc, m_canvas );
    item = screen->GetCurItem();    // Can be modified by previous calls.

    switch( id )
    {
    case ID_HIERARCHY:
        InstallHierarchyFrame( &dc, pos );
        SetRepeatItem( NULL );
        break;

    case wxID_CUT:
        if( screen->m_BlockLocate.GetCommand() != BLOCK_MOVE )
            break;

        screen->m_BlockLocate.SetCommand( BLOCK_DELETE );
        screen->m_BlockLocate.SetMessageBlock( this );
        HandleBlockEnd( &dc );
        SetRepeatItem( NULL );
        SetSheetNumberAndCount();
        break;

    case wxID_PASTE:
        HandleBlockBegin( &dc, BLOCK_PASTE, GetCrossHairPosition() );
        break;

    case ID_POPUP_SCH_ENTRY_SELECT_SLASH:
        m_canvas->MoveCursorToCrossHair();
        SetBusEntryShape( &dc, dynamic_cast<SCH_BUS_ENTRY_BASE*>( item ), '/' );
        break;

    case ID_POPUP_SCH_ENTRY_SELECT_ANTISLASH:
        m_canvas->MoveCursorToCrossHair();
        SetBusEntryShape( &dc, dynamic_cast<SCH_BUS_ENTRY_BASE*>( item ), '\\' );
        break;

    case ID_POPUP_CANCEL_CURRENT_COMMAND:
        if( m_canvas->IsMouseCaptured() )
//.........这里部分代码省略.........

void EDA_DRAW_PANEL::OnMouseWheel( wxMouseEvent& event )
{
    if( m_ignoreMouseEvents )
        return;

    wxRect rect = wxRect( wxPoint( 0, 0 ), GetClientSize() );

    // Ignore scroll events if the cursor is outside the drawing area.
    if( event.GetWheelRotation() == 0 || !GetParent()->IsEnabled()
       || !rect.Contains( event.GetPosition() ) )
    {
        wxLogTrace( kicadTraceCoords,
                    wxT( "OnMouseWheel() position(%d, %d) rectangle(%d, %d, %d, %d)" ),
                    event.GetPosition().x, event.GetPosition().y,
                    rect.x, rect.y, rect.width, rect.height );
        event.Skip();
        return;
    }

    INSTALL_UNBUFFERED_DC( dc, this );
    GetParent()->SetCrossHairPosition( event.GetLogicalPosition( dc ) );

    wxCommandEvent cmd( wxEVT_COMMAND_MENU_SELECTED );
    cmd.SetEventObject( this );

    bool offCenterReq = event.ControlDown() && event.ShiftDown();
    offCenterReq = offCenterReq || m_enableZoomNoCenter;

    int axis = event.GetWheelAxis();
    int wheelRotation = event.GetWheelRotation();

    if( m_enableMousewheelPan )
    {
        // MousewheelPAN + Ctrl = zooming
        if( event.ControlDown() && !event.ShiftDown() )
        {
            if( wheelRotation > 0 )
                cmd.SetId( ID_POPUP_ZOOM_IN );
            else if( wheelRotation < 0)
                cmd.SetId( ID_POPUP_ZOOM_OUT );
        }
        // MousewheelPAN + Shift = horizontal scrolling
        // Without modifiers MousewheelPAN - just pan
        else
        {
            if( event.ShiftDown() && !event.ControlDown() )
                axis = wxMOUSE_WHEEL_HORIZONTAL;

            wxPoint newStart = GetViewStart();
            wxPoint center = GetParent()->GetScrollCenterPosition();
            double scale = GetParent()->GetScreen()->GetScalingFactor();

            if( axis == wxMOUSE_WHEEL_HORIZONTAL )
            {
                newStart.x += wheelRotation;
                center.x += KiROUND( (double) wheelRotation / scale );
            }
            else
            {
                newStart.y -= wheelRotation;
                center.y -= KiROUND( (double) wheelRotation / scale );
            }
            Scroll( newStart );

            GetParent()->SetScrollCenterPosition( center );
            GetParent()->SetCrossHairPosition( center, true );
            GetParent()->RedrawScreen( center, false );
        }
    }
    else if( wheelRotation > 0 )
    {
        if( event.ShiftDown() && !event.ControlDown() )
            cmd.SetId( ID_PAN_UP );
        else if( event.ControlDown() && !event.ShiftDown() )
            cmd.SetId( ID_PAN_LEFT );
        else if( offCenterReq )
            cmd.SetId( ID_OFFCENTER_ZOOM_IN );
        else
            cmd.SetId( ID_POPUP_ZOOM_IN );
    }
    else if( wheelRotation < 0 )
    {
        if( event.ShiftDown() && !event.ControlDown() )
            cmd.SetId( ID_PAN_DOWN );
        else if( event.ControlDown() && !event.ShiftDown() )
            cmd.SetId( ID_PAN_RIGHT );
        else if( offCenterReq )
            cmd.SetId( ID_OFFCENTER_ZOOM_OUT );
        else
            cmd.SetId( ID_POPUP_ZOOM_OUT );
    }

    if( cmd.GetId() )
        GetEventHandler()->ProcessEvent( cmd );
    event.Skip();
}

//.........这里部分代码省略.........

    if( Component )
    {
        sheet = sheetWithComponentFound;

        if( *sheet != *m_CurrentSheet )
        {
            sheet->LastScreen()->SetZoom( GetScreen()->GetZoom() );
            *m_CurrentSheet = *sheet;
            m_CurrentSheet->UpdateAllScreenReferences();
            centerAndRedraw = true;
        }

        wxPoint delta;
        pos  -= Component->GetPosition();
        delta = Component->GetTransform().TransformCoordinate( pos );
        pos   = delta + Component->GetPosition();


        /* There may be need to reframe the drawing */
        if( ! m_canvas->IsPointOnDisplay( pos ) )
        {
            centerAndRedraw = true;
        }

        if( centerAndRedraw )
        {
            GetScreen()->SetCrossHairPosition(pos);
            RedrawScreen( pos, aWarpMouse );
        }

        else
        {
            INSTALL_UNBUFFERED_DC( dc, m_canvas );

            m_canvas->CrossHairOff( &dc );

            if( aWarpMouse )
                m_canvas->MoveCursor( pos );

            GetScreen()->SetCrossHairPosition(pos);

            m_canvas->CrossHairOn( &dc );
        }
    }


    /* Print diag */
    wxString msg_item;
    msg = aReference;

    switch( aSearchType )
    {
    default:
    case FIND_COMPONENT_ONLY:      // Find component only
        break;

    case FIND_PIN:                 // find a pin
        msg_item = _( "Pin " ) + aSearchText;
        break;

    case FIND_REFERENCE:           // find reference
        msg_item = _( "Ref " ) + aSearchText;
        break;

    case FIND_VALUE:               // find value

void EDA_DRAW_PANEL::OnMouseWheel( wxMouseEvent& event )
{
    if( m_ignoreMouseEvents )
        return;

    wxRect rect = wxRect( wxPoint( 0, 0 ), GetClientSize() );

    // Ignore scroll events if the cursor is outside the drawing area.
    if( event.GetWheelRotation() == 0 || !GetParent()->IsEnabled()
       || !rect.Contains( event.GetPosition() ) )
    {
        wxLogTrace( KICAD_TRACE_COORDS,
                    wxT( "OnMouseWheel() position(%d, %d) rectangle(%d, %d, %d, %d)" ),
                    event.GetPosition().x, event.GetPosition().y,
                    rect.x, rect.y, rect.width, rect.height );
        event.Skip();
        return;
    }

    INSTALL_UNBUFFERED_DC( dc, this );
    GetParent()->SetCrossHairPosition( event.GetLogicalPosition( dc ) );

    wxCommandEvent cmd( wxEVT_COMMAND_MENU_SELECTED );
    cmd.SetEventObject( this );

    bool offCenterReq = event.ControlDown() && event.ShiftDown();
    offCenterReq = offCenterReq || m_enableZoomNoCenter;

    int axis = event.GetWheelAxis();

    // This is a zoom in or out command
    if( event.GetWheelRotation() > 0 )
    {
        if( event.ShiftDown() && !event.ControlDown() )
        {
            if( axis == 0 )
                cmd.SetId( ID_PAN_UP );
            else
                cmd.SetId( ID_PAN_RIGHT );
        }
        else if( event.ControlDown() && !event.ShiftDown() )
            cmd.SetId( ID_PAN_LEFT );
        else if( offCenterReq )
            cmd.SetId( ID_OFFCENTER_ZOOM_IN );
        else
            cmd.SetId( ID_POPUP_ZOOM_IN );
    }
    else if( event.GetWheelRotation() < 0 )
    {
        if( event.ShiftDown() && !event.ControlDown() )
        {
            if( axis == 0 )
                cmd.SetId( ID_PAN_DOWN );
            else
                cmd.SetId( ID_PAN_LEFT );
        }
        else if( event.ControlDown() && !event.ShiftDown() )
            cmd.SetId( ID_PAN_RIGHT );
        else if( offCenterReq )
            cmd.SetId( ID_OFFCENTER_ZOOM_OUT );
        else
            cmd.SetId( ID_POPUP_ZOOM_OUT );
    }

    GetEventHandler()->ProcessEvent( cmd );
    event.Skip();
}

void LIB_EDIT_FRAME::Process_Special_Functions( wxCommandEvent& event )
{
    int     id = event.GetId();
    wxPoint pos;

    m_canvas->SetIgnoreMouseEvents( true );

    wxGetMousePosition( &pos.x, &pos.y );
    pos.y += 20;

    switch( id )   // Stop placement commands before handling new command.
    {
    case ID_POPUP_LIBEDIT_END_CREATE_ITEM:
    case ID_LIBEDIT_EDIT_PIN:
    case ID_POPUP_LIBEDIT_BODY_EDIT_ITEM:
    case ID_POPUP_LIBEDIT_FIELD_EDIT_ITEM:
    case ID_POPUP_LIBEDIT_PIN_GLOBAL_CHANGE_PINSIZE_ITEM:
    case ID_POPUP_LIBEDIT_PIN_GLOBAL_CHANGE_PINNAMESIZE_ITEM:
    case ID_POPUP_LIBEDIT_PIN_GLOBAL_CHANGE_PINNUMSIZE_ITEM:
    case ID_POPUP_ZOOM_BLOCK:
    case ID_POPUP_DELETE_BLOCK:
    case ID_POPUP_COPY_BLOCK:
    case ID_POPUP_SELECT_ITEMS_BLOCK:
    case ID_POPUP_MIRROR_X_BLOCK:
    case ID_POPUP_MIRROR_Y_BLOCK:
    case ID_POPUP_ROTATE_BLOCK:
    case ID_POPUP_PLACE_BLOCK:
    case ID_POPUP_LIBEDIT_DELETE_CURRENT_POLY_SEGMENT:
        break;

    case ID_POPUP_LIBEDIT_CANCEL_EDITING:
        if( m_canvas->IsMouseCaptured() )
            m_canvas->EndMouseCapture();
        else
            m_canvas->EndMouseCapture( ID_NO_TOOL_SELECTED, m_canvas->GetDefaultCursor() );
        break;

    case ID_POPUP_LIBEDIT_DELETE_ITEM:
        m_canvas->EndMouseCapture();
        break;

    default:
        m_canvas->EndMouseCapture( ID_NO_TOOL_SELECTED, m_canvas->GetDefaultCursor(),
                                    wxEmptyString );
        break;
    }

    INSTALL_UNBUFFERED_DC( dc, m_canvas );

    switch( id )
    {
    case ID_POPUP_LIBEDIT_CANCEL_EDITING:
        break;

    case ID_LIBEDIT_SELECT_CURRENT_LIB:
        SelectActiveLibrary();
        break;

    case ID_LIBEDIT_SAVE_CURRENT_PART:
        {
            LIB_PART*   part = GetCurPart();

            if( !part )
            {
                DisplayError( this, _( "No part to save." ) );
                break;
            }

            PART_LIB*   lib  = GetCurLib();

            if( !lib )
                SelectActiveLibrary();

            lib = GetCurLib();

            if( !lib )
            {
                DisplayError( this, _( "No library specified." ) );
                break;
            }

            SaveOnePart( lib );
        }
        break;

    case ID_LIBEDIT_EDIT_PIN_BY_PIN:
        m_editPinsPerPartOrConvert = m_mainToolBar->GetToolToggled( ID_LIBEDIT_EDIT_PIN_BY_PIN );
        break;

    case ID_POPUP_LIBEDIT_END_CREATE_ITEM:
        m_canvas->MoveCursorToCrossHair();
        if( m_drawItem )
        {
            EndDrawGraphicItem( &dc );
        }
        break;

    case ID_POPUP_LIBEDIT_BODY_EDIT_ITEM:
        if( m_drawItem )
        {
//.........这里部分代码省略.........

void PCB_EDIT_FRAME::ListNetsAndSelect( wxCommandEvent& event )
{
    NETINFO_ITEM* net;
    wxString      netFilter;
    wxArrayString list;

    netFilter = wxT( "*" );
    wxTextEntryDialog dlg( this, _( "Filter Net Names" ), _( "Net Filter" ), netFilter );

    if( dlg.ShowModal() != wxID_OK )
        return; // cancelled by user

    netFilter = dlg.GetValue( );

    if( netFilter.IsEmpty() )
        return;

    wxString Line;
    for( unsigned ii = 0; ii < GetBoard()->GetNetCount(); ii++ )
    {
        net = GetBoard()->m_NetInfo.GetNetItem( ii );

        if( !WildCompareString( netFilter, net->GetNetname(), false ) )
            continue;

        Line.Printf( wxT( "net %3.3d:  %s" ), net->GetNet(),
                     GetChars( net->GetNetname() ) );
        list.Add( Line );
    }

    wxSingleChoiceDialog choiceDlg( this, wxEmptyString, _( "Select Net" ), list );

    if( (choiceDlg.ShowModal() == wxID_CANCEL) || (choiceDlg.GetSelection() == wxNOT_FOUND) )
        return;

    bool     found   = false;
    unsigned netcode = (unsigned) choiceDlg.GetSelection();

    // Search for the net selected.
    for( unsigned ii = 0; ii < GetBoard()->GetNetCount(); ii++ )
    {
        net = GetBoard()->FindNet( ii );

        if( !WildCompareString( netFilter, net->GetNetname(), false ) )
            continue;

        if( ii == netcode )
        {
            netcode = net->GetNet();
            found   = true;
            break;
        }
    }

    if( found )
    {
        INSTALL_UNBUFFERED_DC( dc, m_canvas );

        if( GetBoard()->IsHighLightNetON() )
            HighLight( &dc );

        GetBoard()->SetHighLightNet( netcode );
        HighLight( &dc );
    }
}

void EDA_DRAW_PANEL::OnMouseEvent( wxMouseEvent& event )
{
    int          localbutt = 0;
    BASE_SCREEN* screen = GetScreen();

    if( !screen )
        return;

    /* Adjust value to filter mouse displacement before consider the drag
     * mouse is really a drag command, not just a movement while click
     */
#define MIN_DRAG_COUNT_FOR_START_BLOCK_COMMAND 5

    if( event.Leaving() )
        m_canStartBlock = -1;

    if( !IsMouseCaptured() )          // No mouse capture in progress.
        SetAutoPanRequest( false );

    if( GetParent()->IsActive() )
        SetFocus();
    else
        return;

    if( !event.IsButton() && !event.Moving() && !event.Dragging() )
        return;

    if( event.RightDown() )
    {
        OnRightClick( event );
        return;
    }

    if( m_ignoreMouseEvents )
        return;

    if( event.LeftDown() )
        localbutt = GR_M_LEFT_DOWN;

    if( event.ButtonDClick( 1 ) )
        localbutt = GR_M_LEFT_DOWN | GR_M_DCLICK;

    if( event.MiddleDown() )
        localbutt = GR_M_MIDDLE_DOWN;

    INSTALL_UNBUFFERED_DC( DC, this );
    DC.SetBackground( *wxBLACK_BRUSH );

    // Compute the cursor position in drawing (logical) units.
    GetParent()->SetMousePosition( event.GetLogicalPosition( DC ) );

    int kbstat = 0;

    if( event.ShiftDown() )
        kbstat |= GR_KB_SHIFT;

    if( event.ControlDown() )
        kbstat |= GR_KB_CTRL;

    if( event.AltDown() )
        kbstat |= GR_KB_ALT;

    // Calling Double Click and Click functions :
    if( localbutt == (int) ( GR_M_LEFT_DOWN | GR_M_DCLICK ) )
    {
        if( m_ClickTimer )
        {
            m_ClickTimer->Stop();
            wxDELETE( m_ClickTimer );
        }
        GetParent()->OnLeftDClick( &DC, GetParent()->RefPos( true ) );

        // inhibit a response to the mouse left button release,
        // because we have a double click, and we do not want a new
        // OnLeftClick command at end of this Double Click
        m_ignoreNextLeftButtonRelease = true;
    }
    else if( event.LeftUp() )
    {
        // A block command is in progress: a left up is the end of block
        // or this is the end of a double click, already seen
        // Note also m_ignoreNextLeftButtonRelease can be set by
        // the call to OnLeftClick(), so do not change it after calling OnLeftClick
        bool ignoreEvt = m_ignoreNextLeftButtonRelease;
        m_ignoreNextLeftButtonRelease = false;

        if( screen->m_BlockLocate.GetState() == STATE_NO_BLOCK && !ignoreEvt )
        {
            EDA_ITEM* item = screen->GetCurItem();
            m_CursorClickPos = GetParent()->RefPos( true );

            // If we have an item already selected, or we are using a tool,
            // we won't use the disambiguation menu so process the click immediately
            if( ( item && item->GetFlags() ) || GetParent()->GetToolId() != ID_NO_TOOL_SELECTED )
                GetParent()->OnLeftClick( &DC, m_CursorClickPos );
            else
            {
                wxDELETE( m_ClickTimer );
                m_ClickTimer = new wxTimer(this, ID_MOUSE_DOUBLECLICK);
                m_ClickTimer->StartOnce( m_doubleClickInterval );
//.........这里部分代码省略.........

//.........这里部分代码省略.........
    // Stop the current command and deselect the current tool.
    m_canvas->EndMouseCapture( ID_NO_TOOL_SELECTED, m_canvas->GetDefaultCursor() );

    switch( id )
    {
    case ID_NO_TOOL_SELECTED:
        SetToolID( id, m_canvas->GetDefaultCursor(), _( "No tool selected" ) );
        break;

    case ID_HIERARCHY_PUSH_POP_BUTT:
        SetToolID( id, wxCURSOR_HAND, _( "Descend or ascend hierarchy" ) );
        break;

    case ID_NOCONN_BUTT:
        SetToolID( id, wxCURSOR_PENCIL, _( "Add no connect" ) );
        break;

    case ID_WIRE_BUTT:
        SetToolID( id, wxCURSOR_PENCIL, _( "Add wire" ) );
        break;

    case ID_BUS_BUTT:
        SetToolID( id, wxCURSOR_PENCIL, _( "Add bus" ) );
        break;

    case ID_LINE_COMMENT_BUTT:
        SetToolID( id, wxCURSOR_PENCIL, _( "Add lines" ) );
        break;

    case ID_JUNCTION_BUTT:
        SetToolID( id, wxCURSOR_PENCIL, _( "Add junction" ) );
        break;

    case ID_LABEL_BUTT:
        SetToolID( id, wxCURSOR_PENCIL, _( "Add label" ) );
        break;

    case ID_GLABEL_BUTT:
        SetToolID( id, wxCURSOR_PENCIL, _( "Add global label" ) );
        break;

    case ID_HIERLABEL_BUTT:
        SetToolID( id, wxCURSOR_PENCIL, _( "Add hierarchical label" ) );
        break;

    case ID_TEXT_COMMENT_BUTT:
        SetToolID( id, wxCURSOR_PENCIL, _( "Add text" ) );
        break;

    case ID_ADD_IMAGE_BUTT:
        SetToolID( id, wxCURSOR_PENCIL, _( "Add image" ) );
        break;

    case ID_WIRETOBUS_ENTRY_BUTT:
        SetToolID( id, wxCURSOR_PENCIL, _( "Add wire to bus entry" ) );
        break;

    case ID_BUSTOBUS_ENTRY_BUTT:
        SetToolID( id, wxCURSOR_PENCIL, _( "Add bus to bus entry" ) );
        break;

    case ID_SHEET_SYMBOL_BUTT:
        SetToolID( id, wxCURSOR_PENCIL, _( "Add sheet" ) );
        break;

    case ID_SHEET_PIN_BUTT:
        SetToolID( id, wxCURSOR_PENCIL, _( "Add sheet pins" ) );
        break;

    case ID_IMPORT_HLABEL_BUTT:
        SetToolID( id, wxCURSOR_PENCIL, _( "Import sheet pins" ) );
        break;

    case ID_SCH_PLACE_COMPONENT:
        SetToolID( id, wxCURSOR_PENCIL, _( "Add component" ) );
        break;

    case ID_PLACE_POWER_BUTT:
        SetToolID( id, wxCURSOR_PENCIL, _( "Add power" ) );
        break;

    case ID_SCHEMATIC_DELETE_ITEM_BUTT:
        SetToolID( id, wxCURSOR_BULLSEYE, _( "Delete item" ) );
        break;

    default:
        SetRepeatItem( NULL );
    }

    // Simulate left click event if we got here from a hot key.
    if( aEvent.GetClientObject() != NULL )
    {
        EDA_HOTKEY_CLIENT_DATA* data = (EDA_HOTKEY_CLIENT_DATA*) aEvent.GetClientObject();

        wxPoint pos = data->GetPosition();

        INSTALL_UNBUFFERED_DC( dc, m_canvas );
        OnLeftClick( &dc, pos );
    }
}