listctrl.cpp

电驴的MAC源代码

        // and the width of the icon, if any
        int ix = 0, iy = 0;    // init them just to suppress the compiler warnings
        const int image = item.m_image;
        wxImageList *imageList;
        if ( image != -1 )
        {
            imageList = m_owner->m_small_image_list;
            if ( imageList )
            {
                imageList->GetSize(image, ix, iy);
                wLabel += ix + HEADER_IMAGE_MARGIN_IN_REPORT_MODE;
            }
        }
        else
        {
            imageList = NULL;
        }

        // ignore alignment if there is not enough space anyhow
        int xAligned;
        switch ( wLabel < cw ? item.GetAlign() : wxLIST_FORMAT_LEFT )
        {
            default:
                wxFAIL_MSG( _T("unknown list item format") );
                // fall through

            case wxLIST_FORMAT_LEFT:
                xAligned = x;
                break;

            case wxLIST_FORMAT_RIGHT:
                xAligned = x + cw - wLabel;
                break;

            case wxLIST_FORMAT_CENTER:
                xAligned = x + (cw - wLabel) / 2;
                break;
        }

        // draw the text and image clipping them so that they
        // don't overwrite the column boundary
        wxDCClipper clipper(dc, x, HEADER_OFFSET_Y, cw, h  );

        // if we have an image, draw it on the right of the label
        if ( imageList )
        {
            imageList->Draw
                       (
                        image,
                        dc,
                        xAligned + wLabel - ix - HEADER_IMAGE_MARGIN_IN_REPORT_MODE,
                        HEADER_OFFSET_Y + (h - 4 - iy)/2,
                        wxIMAGELIST_DRAW_TRANSPARENT
                       );
        }

        dc.DrawText( item.GetText(),
                     xAligned + EXTRA_WIDTH, h / 2 - hLabel / 2 ); //HEADER_OFFSET_Y + EXTRA_HEIGHT );

        x += wCol;
    }
}

void wxListHeaderWindow::DrawCurrent()
{
#if 1
    m_owner->SetColumnWidth( m_column, m_currentX - m_minX );
#else
    int x1 = m_currentX;
    int y1 = 0;
    m_owner->ClientToScreen( &x1, &y1 );

    int x2 = m_currentX;
    int y2 = 0;
    m_owner->GetClientSize( NULL, &y2 );
    m_owner->ClientToScreen( &x2, &y2 );

    wxScreenDC dc;
    dc.SetLogicalFunction( wxINVERT );
    dc.SetPen( wxPen( *wxBLACK, 2, wxSOLID ) );
    dc.SetBrush( *wxTRANSPARENT_BRUSH );

    AdjustDC(dc);

    dc.DrawLine( x1, y1, x2, y2 );

    dc.SetLogicalFunction( wxCOPY );

    dc.SetPen( wxNullPen );
    dc.SetBrush( wxNullBrush );
#endif
}

void wxListHeaderWindow::OnMouse( wxMouseEvent &event )
{
    // we want to work with logical coords
    int x;
    m_owner->CalcUnscrolledPosition(event.GetX(), 0, &x, NULL);
    int y = event.GetY();

    if (m_isDragging)
    {
        SendListEvent(wxEVT_COMMAND_LIST_COL_DRAGGING, event.GetPosition());

        // we don't draw the line beyond our window, but we allow dragging it
        // there
        int w = 0;
        GetClientSize( &w, NULL );
        m_owner->CalcUnscrolledPosition(w, 0, &w, NULL);
        w -= 6;

        // erase the line if it was drawn
        if ( m_currentX < w )
            DrawCurrent();

        if (event.ButtonUp())
        {
            ReleaseMouse();
            m_isDragging = false;
            m_dirty = true;
            m_owner->SetColumnWidth( m_column, m_currentX - m_minX );
            SendListEvent(wxEVT_COMMAND_LIST_COL_END_DRAG, event.GetPosition());
        }
        else
        {
            if (x > m_minX + 7)
                m_currentX = x;
            else
                m_currentX = m_minX + 7;

            // draw in the new location
            if ( m_currentX < w )
                DrawCurrent();
        }
    }
    else // not dragging
    {
        m_minX = 0;
        bool hit_border = false;

        // end of the current column
        int xpos = 0;

        // find the column where this event occurred
        int col,
            countCol = m_owner->GetColumnCount();
        for (col = 0; col < countCol; col++)
        {
            xpos += m_owner->GetColumnWidth( col );
            m_column = col;

            if ( (abs(x-xpos) < 3) && (y < 22) )
            {
                // near the column border
                hit_border = true;
                break;
            }

            if ( x < xpos )
            {
                // inside the column
                break;
            }

            m_minX = xpos;
        }

        if ( col == countCol )
            m_column = -1;

        if (event.LeftDown() || event.RightUp())
        {
            if (hit_border && event.LeftDown())
            {
                if ( SendListEvent(wxEVT_COMMAND_LIST_COL_BEGIN_DRAG,
                                   event.GetPosition()) )
                {
                    m_isDragging = true;
                    m_currentX = x;
                    CaptureMouse();
                    DrawCurrent();
                }
                //else: column resizing was vetoed by the user code
            }
            else // click on a column
            {
                // record the selected state of the columns
                if (event.LeftDown())
                {
                    for (int i=0; i < m_owner->GetColumnCount(); i++)
                    {
                        wxListItem colItem;
                        m_owner->GetColumn(i, colItem);
                        long state = colItem.GetState();
                        if (i == m_column)
                            colItem.SetState(state | wxLIST_STATE_SELECTED);
                        else
                            colItem.SetState(state & ~wxLIST_STATE_SELECTED);
                        m_owner->SetColumn(i, colItem);
                    }
                }

                SendListEvent( event.LeftDown()
                                    ? wxEVT_COMMAND_LIST_COL_CLICK
                                    : wxEVT_COMMAND_LIST_COL_RIGHT_CLICK,
                                event.GetPosition());
            }
        }
        else if (event.Moving())
        {
            bool setCursor;
            if (hit_border)
            {
                setCursor = m_currentCursor == wxSTANDARD_CURSOR;
                m_currentCursor = m_resizeCursor;
            }
            else
            {
                setCursor = m_currentCursor != wxSTANDARD_CURSOR;
                m_currentCursor = wxSTANDARD_CURSOR;
            }

            if ( setCursor )
                SetCursor(*m_currentCursor);
        }
    }
}

void wxListHeaderWindow::OnSetFocus( wxFocusEvent &WXUNUSED(event) )
{
    m_owner->SetFocus();
    m_owner->Update();
}

bool wxListHeaderWindow::SendListEvent(wxEventType type, const wxPoint& pos)
{
    wxWindow *parent = GetParent();
    wxListEvent le( type, parent->GetId() );
    le.SetEventObject( parent );
    le.m_pointDrag = pos;

    // the position should be relative to the parent window, not
    // this one for compatibility with MSW and common sense: the
    // user code doesn't know anything at all about this header
    // window, so why should it get positions relative to it?
    le.m_pointDrag.y -= GetSize().y;

    le.m_col = m_column;
    return !parent->GetEventHandler()->ProcessEvent( le ) || le.IsAllowed();
}

//-----------------------------------------------------------------------------
// wxListRenameTimer (internal)
//-----------------------------------------------------------------------------

wxListRenameTimer::wxListRenameTimer( wxListMainWindow *owner )
{
    m_owner = owner;
}

void wxListRenameTimer::Notify()
{
    m_owner->OnRenameTimer();
}

//-----------------------------------------------------------------------------
// wxListTextCtrlWrapper (internal)
//-----------------------------------------------------------------------------

BEGIN_EVENT_TABLE(wxListTextCtrlWrapper, wxEvtHandler)
    EVT_CHAR           (wxListTextCtrlWrapper::OnChar)
    EVT_KEY_UP         (wxListTextCtrlWrapper::OnKeyUp)
    EVT_KILL_FOCUS     (wxListTextCtrlWrapper::OnKillFocus)
END_EVENT_TABLE()

wxListTextCtrlWrapper::wxListTextCtrlWrapper(wxListMainWindow *owner,
                                             wxTextCtrl *text,
                                             size_t itemEdit)
              : m_startValue(owner->GetItemText(itemEdit)),
                m_itemEdited(itemEdit)
{
    m_owner = owner;
    m_text = text;
    m_finished = false;
    m_aboutToFinish = false;

    wxRect rectLabel = owner->GetLineLabelRect(itemEdit);

    m_owner->CalcScrolledPosition(rectLabel.x, rectLabel.y,
                                  &rectLabel.x, &rectLabel.y);

    m_text->Create(owner, wxID_ANY, m_startValue,
                   wxPoint(rectLabel.x-4,rectLabel.y-4),
                   wxSize(rectLabel.width+11,rectLabel.height+8));
    m_text->SetFocus();

    m_text->PushEventHandler(this);
}

void wxListTextCtrlWrapper::Finish()
{
    if ( !m_finished )
    {
        m_finished = true;

        m_text->RemoveEventHandler(this);
        m_owner->FinishEditing(m_text);

        wxPendingDelete.Append( this );
    }
}

bool wxListTextCtrlWrapper::AcceptChanges()
{
    const wxString value = m_text->GetValue();

    // notice that we should always call OnRenameAccept() to generate the "end
    // label editing" event, even if the user hasn't really changed anything
    if ( !m_owner->OnRenameAccept(m_itemEdited, value) )
    {
        // vetoed by the user
        return false;
    }

    // accepted, do rename the item (unless nothing changed)
    if ( value != m_startValue )
        m_owner->SetItemText(m_itemEdited, value);

    return true;
}

void wxListTextCtrlWrapper::AcceptChangesAndFinish()
{
    m_aboutToFinish = true;

    // Notify the owner about the changes
    AcceptChanges();

    // Even if vetoed, close the control (consistent with MSW)
    Finish();
}

void wxListTextCtrlWrapper::OnChar( wxKeyEvent &event )
{
    switch ( event.m_keyCode )
    {
        case WXK_RETURN:
            AcceptChangesAndFinish();
            break;

        case WXK_ESCAPE:
            m_owner->OnRenameCancelled( m_itemEdited );
            Finish();
            break;

        default:
            event.Skip();
    }
}

void wxListTextCtrlWrapper::OnKeyUp( wxKeyEvent &event )
{
    if (m_finished)
    {
        event.Skip();
        return;
    }

    // auto-grow the textctrl:
    wxSize parentSize = m_owner->GetSize();
    wxPoint myPos = m_text->GetPosition();
    wxSize mySize = m_text->GetSize();
    int sx, sy;
    m_text->GetTextExtent(m_text->GetValue() + _T("MM"), &sx, &sy);
    if (myPos.x + sx > parentSize.x)
        sx = parentSize.x - myPos.x;
    if (mySize.x > sx)
        sx = mySize.x;
    m_text->SetSize(sx, wxDefaultCoord);

    event.Skip();
}

void wxListTextCtrlWrapper::OnKillFocus( wxFocusEvent &event )
{
    if ( !m_finished && !m_aboutToFinish )
    {
        if ( !AcceptChanges() )
            m_owner->OnRenameCancelled( m_itemEdited );

        Finish();
    }

    // We must let the native text control handle focus
    event.Skip();
}

//-----------------------------------------------------------------------------
//  wxListMainWindow
//-----------------------------------------------------------------------------

BEGIN_EVENT_TABLE(wxListMainWindow,wxScrolledWindow)
  EVT_PAINT          (wxListMainWindow::OnPaint)
  EVT_ERASE_BACKGROUND (wxListMainWindow::OnErase)
  EVT_MOUSE_EVENTS   (wxListMainWindow::OnMouse)
  EVT_CHAR           (wxListMainWindow::OnChar)
  EVT_KEY_DOWN       (wxListMainWindow::OnKeyDown)
  EVT_KEY_UP         (wxListMainWindow::OnKeyUp)
  EVT_SET_FOCUS      (wxListMainWindow::OnSetFocus)
  EVT_KILL_FOCUS     (wxListMainWindow::OnKillFocus)
  EVT_SCROLLWIN      (wxListMainWindow::OnScroll)
END_EVENT_TABLE()

void wxListMainWindow::Init()
{
    m_dirty = true;
    m_countVirt = 0;
    m_lineFrom =
    m_lineTo = (size_t)-1;
    m_linesPerPage = 0;

    m_headerWidth =
    m_lineHeight = 0;

    m_small_image_list = (wxImageList *) NULL;
    m_normal_image_list = (wxImageList *) NULL;

    m_small_spacing = 30;
    m_normal_spacing = 40;

    m_hasFocus = false;
    m_dragCount = 0;
    m_isCreated = false;

    m_lastOnSame = false;
    m_renameTimer = new wxListRenameTimer( this );
    m_textctrlWrapper = NULL;

    m_current =
    m_lineLastClicked =
    m_lineSelectSingleOnUp =
    m_lineBeforeLastClicked = (size_t)-1;

    m_freezeCount = 0;
}

wxListMainWindow::wxListMainWindow()
{
    Init();

    m_highlightBrush =
    m_highlightUnfocusedBrush = (wxBrush *) NULL;
}

wxListMainWindow::wxListMainWindow( wxWindow *parent,
                                    wxWindowID id,
                                    const wxPoint& pos,
                                    const wxSize& size,
                                    long style