listctrl.cpp

来自「A*算法 A*算法 A*算法 A*算法A*算法A*算法」· C++ 代码 · 共 2,239 行 · 第 1/5 页

        // for this we need the width of the text
        wxCoord wLabel;
        wxCoord hLabel;
        dc.GetTextExtent(item.GetText(), &wLabel, &hLabel);
        wLabel += 2*EXTRA_WIDTH;

        // and the width of the icon, if any
        static const int MARGIN_BETWEEN_TEXT_AND_ICON = 2;
        int ix = 0,     // init them just to suppress the compiler warnings
            iy = 0;
        const int image = item.m_image;
        wxImageListType *imageList;
        if ( image != -1 )
        {
            imageList = m_owner->m_small_image_list;
            if ( imageList )
            {
                imageList->GetSize(image, ix, iy);
                wLabel += ix + MARGIN_BETWEEN_TEXT_AND_ICON;
            }
        }
        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;
        }


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

            cw -= ix + MARGIN_BETWEEN_TEXT_AND_ICON;
        }

        // draw the text clipping it so that it doesn't overwrite the column
        // boundary
        wxDCClipper clipper(dc, x, HEADER_OFFSET_Y, cw, h - 4 );

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

        x += wCol;
    }

    dc.EndDrawing();
}

void wxListHeaderWindow::DrawCurrent()
{
    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 );
}

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
            {
                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, 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();
}

//-----------------------------------------------------------------------------
// wxListTextCtrl (internal)
//-----------------------------------------------------------------------------

BEGIN_EVENT_TABLE(wxListTextCtrl,wxTextCtrl)
    EVT_CHAR           (wxListTextCtrl::OnChar)
    EVT_KEY_UP         (wxListTextCtrl::OnKeyUp)
    EVT_KILL_FOCUS     (wxListTextCtrl::OnKillFocus)
END_EVENT_TABLE()

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

    wxRect rectLabel = owner->GetLineLabelRect(itemEdit);

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

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

void wxListTextCtrl::Finish()
{
    if ( !m_finished )
    {
        wxPendingDelete.Append(this);
        m_owner->m_textctrl = NULL;
        
        m_finished = true;

        m_owner->SetFocusIgnoringChildren();
    }
}

bool wxListTextCtrl::AcceptChanges()
{
    const wxString value = GetValue();

    if ( value == m_startValue )
    {
        // nothing changed, always accept
        return true;
    }

    if ( !m_owner->OnRenameAccept(m_itemEdited, value) )
    {
        // vetoed by the user
        return false;
    }

    // accepted, do rename the item
    m_owner->SetItemText(m_itemEdited, value);

    return true;
}

void wxListTextCtrl::AcceptChangesAndFinish()
{
    m_aboutToFinish = true;
    // Notify the owner about the changes
    AcceptChanges();
    // Even if vetoed, close the control (consistent with MSW)
    Finish();
}

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

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

        default:
            event.Skip();
    }
}

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

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

    event.Skip();
}

void wxListTextCtrl::OnKillFocus( wxFocusEvent &event )
{
    if ( !m_finished && !m_aboutToFinish  )
    {
        // We must finish regardless of success, otherwise we'll get
        // focus problems:
        Finish();

        if ( !AcceptChanges() )
            m_owner->OnRenameCancelled( m_itemEdited );
    }

    // We must let the native text control handle focus, too, otherwise
    // it could have problems with the cursor (e.g., in wxGTK).
    event.Skip();
}

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

IMPLEMENT_DYNAMIC_CLASS(wxListMainWindow,wxScrolledWindow)

BEGIN_EVENT_TABLE(wxListMainWindow,wxScrolledWindow)
  EVT_PAINT          (wxListMainWindow::OnPaint)
  EVT_MOUSE_EVENTS   (wxListMainWindow::OnMouse)
  EVT_CHAR           (wxListMainWindow::OnChar)
  EVT_KEY_DOWN       (wxListMainWindow::OnKeyDown)
  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 = (wxImageListType *) NULL;
    m_normal_image_list = (wxImageListType *) 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_textctrl = 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::wxListMa