view.cpp

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

                    newShape->SetX(x2);
                    break;
                }
                case DIAGRAM_TOOLBAR_ALIGNB:
                {
                    double y2 = (double)(y + (height/2.0) - (height1/2.0));
                    newShape->SetY(y2);
                    break;
                }
                case DIAGRAM_TOOLBAR_ALIGNT:
                {
                    double y2 = (double)(y - (height/2.0) + (height1/2.0));
                    newShape->SetY(y2);
                    break;
                }
                case DIAGRAM_TOOLBAR_ALIGN_HORIZ:
                {
                    newShape->SetX(x);
                    break;
                }
                case DIAGRAM_TOOLBAR_ALIGN_VERT:
                {
                    newShape->SetY(y);
                    break;
                }
                case DIAGRAM_TOOLBAR_COPY_SIZE:
                {
                    newShape->SetSize(width, height);
                    break;
                }
            }
            csCommandState* state = new csCommandState(ID_CS_ALIGN, newShape, shape);
            cmd->AddState(state);
        }
        node = node->GetNext();
    }
    doc->GetCommandProcessor()->Submit(cmd);
}

void csDiagramView::OnAlignUpdate(wxUpdateUIEvent& event)
{
    // This is an approximation, since there may be lines
    // amongst the selections.
    event.Enable( (m_selections.GetCount() > 1) ) ;
}

void csDiagramView::OnNewLinePoint(wxCommandEvent& WXUNUSED(event))
{
    csDiagramDocument *doc = (csDiagramDocument *)GetDocument();
    csDiagramCommand* cmd = new csDiagramCommand(_T("New line point"), doc);

    wxObjectList::compatibility_iterator node = m_selections.GetFirst();
    while (node)
    {
        wxShape* shape = (wxShape*) node->GetData();
        if (shape->IsKindOf(CLASSINFO(wxLineShape)))
        {
            wxShape* newShape = shape->CreateNewCopy();
            ((wxLineShape*)newShape)->InsertLineControlPoint(NULL);
            csCommandState* state = new csCommandState(ID_CS_NEW_POINT, newShape, shape);
            cmd->AddState(state);
        }
        node = node->GetNext();
    }
    doc->GetCommandProcessor()->Submit(cmd);
}

void csDiagramView::OnCutLinePoint(wxCommandEvent& WXUNUSED(event))
{
    csDiagramDocument *doc = (csDiagramDocument *)GetDocument();
    csDiagramCommand* cmd = new csDiagramCommand(_T("Cut line point"), doc);

    wxObjectList::compatibility_iterator node = m_selections.GetFirst();
    while (node)
    {
        wxShape* shape = (wxShape*) node->GetData();
        if (shape->IsKindOf(CLASSINFO(wxLineShape)))
        {
            wxShape* newShape = shape->CreateNewCopy();
            ((wxLineShape*)newShape)->DeleteLineControlPoint();
            csCommandState* state = new csCommandState(ID_CS_CUT_POINT, newShape, shape);
            cmd->AddState(state);
        }
        node = node->GetNext();
    }
    doc->GetCommandProcessor()->Submit(cmd);
}

void csDiagramView::OnStraightenLines(wxCommandEvent& WXUNUSED(event))
{
    csDiagramDocument *doc = (csDiagramDocument *)GetDocument();
    csDiagramCommand* cmd = new csDiagramCommand(_T("Straighten lines"), doc);

    wxObjectList::compatibility_iterator node = m_selections.GetFirst();
    while (node)
    {
        wxShape* shape = (wxShape*) node->GetData();
        if (shape->IsKindOf(CLASSINFO(wxLineShape)))
        {
            wxShape* newShape = shape->CreateNewCopy();
            ((wxLineShape*)newShape)->Straighten();
            csCommandState* state = new csCommandState(ID_CS_STRAIGHTEN, newShape, shape);
            cmd->AddState(state);
        }
        node = node->GetNext();
    }
    doc->GetCommandProcessor()->Submit(cmd);
}

void csDiagramView::OnNewLinePointUpdate(wxUpdateUIEvent& event)
{
    wxList selections;
    FindSelectedShapes(selections, CLASSINFO(wxLineShape));
    event.Enable( (selections.GetCount() > 0) );
}

void csDiagramView::OnCutLinePointUpdate(wxUpdateUIEvent& event)
{
    wxList selections;
    FindSelectedShapes(selections, CLASSINFO(wxLineShape));
    event.Enable( (selections.GetCount() > 0) );
}

void csDiagramView::OnStraightenLinesUpdate(wxUpdateUIEvent& event)
{
    wxList selections;
    FindSelectedShapes(selections, CLASSINFO(wxLineShape));
    event.Enable( (selections.GetCount() > 0) );
}

/*
 * Window implementations
 */

IMPLEMENT_CLASS(csCanvas, wxShapeCanvas)

BEGIN_EVENT_TABLE(csCanvas, wxShapeCanvas)
    EVT_MOUSE_EVENTS(csCanvas::OnMouseEvent)
    EVT_PAINT(csCanvas::OnPaint)
END_EVENT_TABLE()

// Define a constructor for my canvas
csCanvas::csCanvas(csDiagramView *v, wxWindow *parent, wxWindowID id, const wxPoint& pos,
    const wxSize& size, long style):
 wxShapeCanvas(parent, id, pos, size, style)
{
  m_view = v;
}

csCanvas::~csCanvas(void)
{
}

void csCanvas::DrawOutline(wxDC& dc, double x1, double y1, double x2, double y2)
{
    wxPen dottedPen(*wxBLACK, 1, wxDOT);
    dc.SetPen(dottedPen);
    dc.SetBrush(* wxTRANSPARENT_BRUSH);

    dc.DrawRectangle((long) x1, (long) y1, (long) (x2 - x1), (long) (y2 - y1));
}

void csCanvas::OnLeftClick(double x, double y, int WXUNUSED(keys))
{
    csEditorToolPalette *palette = wxGetApp().GetDiagramPalette();

    if (palette->GetSelection() == PALETTE_ARROW)
    {
        GetView()->SelectAll(false);

        wxClientDC dc(this);
        PrepareDC(dc);

        Redraw(dc);
        return;
    }

    if (palette->GetSelection() == PALETTE_TEXT_TOOL)
    {
        wxString newLabel;

#if wxUSE_WX_RESOURCES
        // Ask for a label and create a new free-floating text region
        csLabelEditingDialog* dialog = new csLabelEditingDialog(GetParent());

        dialog->SetShapeLabel( wxEmptyString );
        dialog->SetTitle(_T("New text box"));
        if (dialog->ShowModal() == wxID_CANCEL)
        {
            dialog->Destroy();
            return;
        }

        newLabel = dialog->GetShapeLabel();
        dialog->Destroy();
#endif // wxUSE_WX_RESOURCES

        wxShape* shape = new csTextBoxShape;
        shape->AssignNewIds();
        shape->SetEventHandler(new csEvtHandler(shape, shape, newLabel));

        wxComboBox* comboBox = wxGetApp().GetPointSizeComboBox();
        wxString str(comboBox->GetValue());
        long pointSize;
        str.ToLong( &pointSize );

        wxFont* newFont = wxTheFontList->FindOrCreateFont(pointSize,
                shape->GetFont()->GetFamily(),
                shape->GetFont()->GetStyle(),
                shape->GetFont()->GetWeight(),
                shape->GetFont()->GetUnderlined(),
                shape->GetFont()->GetFaceName());

        shape->SetFont(newFont);

        shape->SetX(x);
        shape->SetY(y);

        csDiagramCommand* cmd = new csDiagramCommand(_T("Text box"),
            (csDiagramDocument *)GetView()->GetDocument(),
            new csCommandState(ID_CS_ADD_SHAPE, shape, NULL));
        GetView()->GetDocument()->GetCommandProcessor()->Submit(cmd);

        palette->SetSelection(PALETTE_ARROW);

        return;
    }

    csSymbol* symbol = wxGetApp().GetSymbolDatabase()->FindSymbol(palette->GetSelection());
    if (symbol)
    {
        wxShape* theShape = symbol->GetShape()->CreateNewCopy();

        wxComboBox* comboBox = wxGetApp().GetPointSizeComboBox();
        wxString str(comboBox->GetValue());
        long pointSize;
        str.ToLong( &pointSize );

        wxFont* newFont = wxTheFontList->FindOrCreateFont(pointSize,
                symbol->GetShape()->GetFont()->GetFamily(),
                symbol->GetShape()->GetFont()->GetStyle(),
                symbol->GetShape()->GetFont()->GetWeight(),
                symbol->GetShape()->GetFont()->GetUnderlined(),
                symbol->GetShape()->GetFont()->GetFaceName());

        theShape->SetFont(newFont);

        theShape->AssignNewIds();
        theShape->SetX(x);
        theShape->SetY(y);

        csDiagramCommand* cmd = new csDiagramCommand(symbol->GetName(),
            (csDiagramDocument *)GetView()->GetDocument(),
            new csCommandState(ID_CS_ADD_SHAPE, theShape, NULL));
        GetView()->GetDocument()->GetCommandProcessor()->Submit(cmd);

        palette->SetSelection(PALETTE_ARROW);
    }
}

void csCanvas::OnRightClick(double WXUNUSED(x), double WXUNUSED(y), int WXUNUSED(keys))
{
}

// Initial point
static double sg_initialX, sg_initialY;

void csCanvas::OnDragLeft(bool WXUNUSED(draw), double x, double y, int WXUNUSED(keys))
{
    wxClientDC dc(this);
    PrepareDC(dc);

    dc.SetLogicalFunction(OGLRBLF);
    DrawOutline(dc, sg_initialX, sg_initialY, x, y);
}

void csCanvas::OnBeginDragLeft(double x, double y, int WXUNUSED(keys))
{
    sg_initialX = x;
    sg_initialY = y;

    wxClientDC dc(this);
    PrepareDC(dc);

    dc.SetLogicalFunction(OGLRBLF);
    DrawOutline(dc, sg_initialX, sg_initialY, x, y);
    CaptureMouse();
}

void csCanvas::OnEndDragLeft(double x, double y, int WXUNUSED(keys))
{
    ReleaseMouse();

    wxClientDC dc(this);
    PrepareDC(dc);

    // Select all images within the rectangle
    float min_x, max_x, min_y, max_y;
    min_x = wxMin(x, sg_initialX);
    max_x = wxMax(x, sg_initialX);
    min_y = wxMin(y, sg_initialY);
    max_y = wxMax(y, sg_initialY);

    wxObjectList::compatibility_iterator node = GetDiagram()->GetShapeList()->GetFirst();
    while (node)
    {
        wxShape *shape = (wxShape *)node->GetData();
        if (shape->GetParent() == NULL && !shape->IsKindOf(CLASSINFO(wxControlPoint)))
        {
            float image_x = shape->GetX();
            float image_y = shape->GetY();
            if (image_x >= min_x && image_x <= max_x &&
                image_y >= min_y && image_y <= max_y)
            {
                shape->Select(true, &dc);
                GetView()->SelectShape(shape, true);
            }
        }
        node = node->GetNext();
    }
}

void csCanvas::OnDragRight(bool WXUNUSED(draw), double WXUNUSED(x), double WXUNUSED(y), int WXUNUSED(keys))
{
}

void csCanvas::OnBeginDragRight(double WXUNUSED(x), double WXUNUSED(y), int WXUNUSED(keys))
{
}

void csCanvas::OnEndDragRight(double WXUNUSED(x), double WXUNUSED(y), int WXUNUSED(keys))
{
}

void csCanvas::OnMouseEvent(wxMouseEvent& event)
{
    wxShapeCanvas::OnMouseEvent(event);
}

void csCanvas::OnPaint(wxPaintEvent& event)
{
//  if (GetDiagram())
    wxShapeCanvas::OnPaint(event);
}