ctrlrend.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 876 行 · 第 1/2 页

///////////////////////////////////////////////////////////////////////////////
// Name:        univ/ctrlrend.cpp
// Purpose:     wxControlRenderer implementation
// Author:      Vadim Zeitlin
// Modified by:
// Created:     15.08.00
// RCS-ID:      $Id: ctrlrend.cpp,v 1.8 2004/11/05 21:03:44 ABX Exp $
// Copyright:   (c) 2000 SciTech Software, Inc. (www.scitechsoft.com)
// Licence:     wxWindows licence
///////////////////////////////////////////////////////////////////////////////

// ===========================================================================
// declarations
// ===========================================================================

// ---------------------------------------------------------------------------
// headers
// ---------------------------------------------------------------------------

#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
    #pragma implementation "renderer.h"
#endif

// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"

#ifdef __BORLANDC__
    #pragma hdrstop
#endif

#ifndef WX_PRECOMP
    #include "wx/app.h"
    #include "wx/control.h"
    #include "wx/checklst.h"
    #include "wx/listbox.h"
    #include "wx/scrolbar.h"
    #include "wx/dc.h"
#endif // WX_PRECOMP

#include "wx/image.h"
#include "wx/log.h"

#include "wx/univ/theme.h"
#include "wx/univ/renderer.h"
#include "wx/univ/colschem.h"

#if wxUSE_GAUGE
#include "wx/gauge.h"
#endif

// ============================================================================
// implementation
// ============================================================================

// ----------------------------------------------------------------------------
// wxRenderer: drawing helpers
// ----------------------------------------------------------------------------

void wxRenderer::StandardDrawFrame(wxDC& dc,
                                   const wxRect& rectFrame,
                                   const wxRect& rectLabel)
{
    // draw left, bottom and right lines entirely
    DrawVerticalLine(dc, rectFrame.GetLeft(),
                     rectFrame.GetTop(), rectFrame.GetBottom() - 2);
    DrawHorizontalLine(dc, rectFrame.GetBottom() - 1,
                       rectFrame.GetLeft(), rectFrame.GetRight());
    DrawVerticalLine(dc, rectFrame.GetRight() - 1,
                     rectFrame.GetTop(), rectFrame.GetBottom() - 1);

    // and 2 parts of the top line
    DrawHorizontalLine(dc, rectFrame.GetTop(),
                       rectFrame.GetLeft() + 1, rectLabel.GetLeft());
    DrawHorizontalLine(dc, rectFrame.GetTop(),
                       rectLabel.GetRight(), rectFrame.GetRight() - 2);
}

/* static */
void wxRenderer::StandardDrawTextLine(wxDC& dc,
                                      const wxString& text,
                                      const wxRect& rect,
                                      int selStart, int selEnd,
                                      int flags)
{
    if ( (selStart == -1) || !(flags & wxCONTROL_FOCUSED) )
    {
        // just draw it as is
        dc.DrawText(text, rect.x, rect.y);
    }
    else // we have selection
    {
        wxCoord width,
                x = rect.x;

        // draw the part before selection
        wxString s(text, (size_t)selStart);
        if ( !s.empty() )
        {
            dc.DrawText(s, x, rect.y);

            dc.GetTextExtent(s, &width, NULL);
            x += width;
        }

        // draw the selection itself
        s = wxString(text.c_str() + selStart, text.c_str() + selEnd);
        if ( !s.empty() )
        {
            wxColour colFg = dc.GetTextForeground(),
                     colBg = dc.GetTextBackground();
            dc.SetTextForeground(wxTHEME_COLOUR(HIGHLIGHT_TEXT));
            dc.SetTextBackground(wxTHEME_COLOUR(HIGHLIGHT));
            dc.SetBackgroundMode(wxSOLID);

            dc.DrawText(s, x, rect.y);
            dc.GetTextExtent(s, &width, NULL);
            x += width;

            dc.SetBackgroundMode(wxTRANSPARENT);
            dc.SetTextBackground(colBg);
            dc.SetTextForeground(colFg);
        }

        // draw the final part
        s = text.c_str() + selEnd;
        if ( !s.empty() )
        {
            dc.DrawText(s, x, rect.y);
        }
    }
}

// ----------------------------------------------------------------------------
// wxRenderer: scrollbar geometry
// ----------------------------------------------------------------------------

/* static */
void wxRenderer::StandardScrollBarThumbSize(wxCoord length,
                                            int thumbPos,
                                            int thumbSize,
                                            int range,
                                            wxCoord *thumbStart,
                                            wxCoord *thumbEnd)
{
    // the thumb can't be made less than this number of pixels
    static const wxCoord thumbMinWidth = 8; // FIXME: should be configurable

    *thumbStart = (length*thumbPos) / range;
    *thumbEnd = (length*(thumbPos + thumbSize)) / range;

    if ( *thumbEnd - *thumbStart < thumbMinWidth )
    {
        // adjust the end if possible
        if ( *thumbStart <= length - thumbMinWidth )
        {
            // yes, just make it wider
            *thumbEnd = *thumbStart + thumbMinWidth;
        }
        else // it is at the bottom of the scrollbar
        {
            // so move it a bit up
            *thumbStart = length - thumbMinWidth;
            *thumbEnd = length;
        }
    }
}

/* static */
wxRect wxRenderer::StandardGetScrollbarRect(const wxScrollBar *scrollbar,
                                            wxScrollBar::Element elem,
                                            int thumbPos,
                                            const wxSize& sizeArrow)
{
    if ( thumbPos == -1 )
    {
        thumbPos = scrollbar->GetThumbPosition();
    }

    wxSize sizeTotal = scrollbar->GetClientSize();
    wxCoord *start, *width;
    wxCoord length, arrow;
    wxRect rect;
    if ( scrollbar->IsVertical() )
    {
        rect.x = 0;
        rect.width = sizeTotal.x;
        length = sizeTotal.y;
        start = &rect.y;
        width = &rect.height;
        arrow = sizeArrow.y;
    }
    else // horizontal
    {
        rect.y = 0;
        rect.height = sizeTotal.y;
        length = sizeTotal.x;
        start = &rect.x;
        width = &rect.width;
        arrow = sizeArrow.x;
    }

    switch ( elem )
    {
        case wxScrollBar::Element_Arrow_Line_1:
            *start = 0;
            *width = arrow;
            break;

        case wxScrollBar::Element_Arrow_Line_2:
            *start = length - arrow;
            *width = arrow;
            break;

        case wxScrollBar::Element_Arrow_Page_1:
        case wxScrollBar::Element_Arrow_Page_2:
            // we don't have them at all
            break;

        case wxScrollBar::Element_Thumb:
        case wxScrollBar::Element_Bar_1:
        case wxScrollBar::Element_Bar_2:
            // we need to calculate the thumb position - do it
            {
                length -= 2*arrow;
                wxCoord thumbStart, thumbEnd;
                int range = scrollbar->GetRange();
                if ( !range )
                {
                    thumbStart =
                    thumbEnd = 0;
                }
                else
                {
                    StandardScrollBarThumbSize(length,
                                               thumbPos,
                                               scrollbar->GetThumbSize(),
                                               range,
                                               &thumbStart,
                                               &thumbEnd);
                }

                if ( elem == wxScrollBar::Element_Thumb )
                {
                    *start = thumbStart;
                    *width = thumbEnd - thumbStart;
                }
                else if ( elem == wxScrollBar::Element_Bar_1 )
                {
                    *start = 0;
                    *width = thumbStart;
                }
                else // elem == wxScrollBar::Element_Bar_2
                {
                    *start = thumbEnd;
                    *width = length - thumbEnd;
                }

                // everything is relative to the start of the shaft so far
                *start += arrow;
            }
            break;

        case wxScrollBar::Element_Max:
        default:
            wxFAIL_MSG( _T("unknown scrollbar element") );
    }

    return rect;
}

/* static */
wxCoord wxRenderer::StandardScrollBarSize(const wxScrollBar *scrollbar,
                                          const wxSize& sizeArrowSB)
{
    wxCoord sizeArrow, sizeTotal;
    if ( scrollbar->GetWindowStyle() & wxVERTICAL )
    {
        sizeArrow = sizeArrowSB.y;
        sizeTotal = scrollbar->GetSize().y;
    }
    else // horizontal
    {
        sizeArrow = sizeArrowSB.x;
        sizeTotal = scrollbar->GetSize().x;
    }

    return sizeTotal - 2*sizeArrow;
}

/* static */
wxCoord wxRenderer::StandardScrollbarToPixel(const wxScrollBar *scrollbar,
                                             int thumbPos,
                                             const wxSize& sizeArrow)
{
    int range = scrollbar->GetRange();
    if ( !range )
    {
        // the only valid position anyhow
        return 0;
    }

    if ( thumbPos == -1 )
    {
        // by default use the current thumb position
        thumbPos = scrollbar->GetThumbPosition();
    }

    return ( thumbPos*StandardScrollBarSize(scrollbar, sizeArrow) ) / range
             + (scrollbar->IsVertical() ? sizeArrow.y : sizeArrow.x);
}

/* static */
int wxRenderer::StandardPixelToScrollbar(const wxScrollBar *scrollbar,
                                         wxCoord coord,
                                         const wxSize& sizeArrow)
{
    return ( (coord - (scrollbar->IsVertical() ? sizeArrow.y : sizeArrow.x)) *
               scrollbar->GetRange() ) /
               StandardScrollBarSize(scrollbar, sizeArrow);
}

/* static */
wxHitTest wxRenderer::StandardHitTestScrollbar(const wxScrollBar *scrollbar,
                                               const wxPoint& pt,
                                               const wxSize& sizeArrowSB)
{
    // we only need to work with either x or y coord depending on the
    // orientation, choose one (but still check the other one to verify if the
    // mouse is in the window at all)
    wxCoord coord, sizeArrow, sizeTotal;
    wxSize size = scrollbar->GetSize();
    if ( scrollbar->GetWindowStyle() & wxVERTICAL )
    {
        if ( pt.x < 0 || pt.x > size.x )
            return wxHT_NOWHERE;

        coord = pt.y;
        sizeArrow = sizeArrowSB.y;
        sizeTotal = size.y;
    }
    else // horizontal
    {
        if ( pt.y < 0 || pt.y > size.y )
            return wxHT_NOWHERE;

        coord = pt.x;
        sizeArrow = sizeArrowSB.x;
        sizeTotal = size.x;
    }

    // test for the arrows first as it's faster
    if ( coord < 0 || coord > sizeTotal )
    {
        return wxHT_NOWHERE;
    }
    else if ( coord < sizeArrow )
    {
        return wxHT_SCROLLBAR_ARROW_LINE_1;
    }
    else if ( coord > sizeTotal - sizeArrow )
    {
        return wxHT_SCROLLBAR_ARROW_LINE_2;
    }
    else
    {
        // calculate the thumb position in pixels
        sizeTotal -= 2*sizeArrow;
        wxCoord thumbStart, thumbEnd;
        int range = scrollbar->GetRange();
        if ( !range )
        {
            // clicking the scrollbar without range has no effect
            return wxHT_NOWHERE;
        }
        else
        {
            StandardScrollBarThumbSize(sizeTotal,
                                       scrollbar->GetThumbPosition(),
                                       scrollbar->GetThumbSize(),
                                       range,
                                       &thumbStart,
                                       &thumbEnd);
        }

        // now compare with the thumb position
        coord -= sizeArrow;
        if ( coord < thumbStart )
            return wxHT_SCROLLBAR_BAR_1;
        else if ( coord > thumbEnd )
            return wxHT_SCROLLBAR_BAR_2;
        else
            return wxHT_SCROLLBAR_THUMB;
    }
}

wxRenderer::~wxRenderer()
{
}

// ----------------------------------------------------------------------------
// wxControlRenderer
// ----------------------------------------------------------------------------

wxControlRenderer::wxControlRenderer(wxWindow *window,
                                     wxDC& dc,
                                     wxRenderer *renderer)
                : m_dc(dc)
{
    m_window = window;
    m_renderer = renderer;

    wxSize size = m_window->GetClientSize();
    m_rect.x =
    m_rect.y = 0;
    m_rect.width = size.x;
    m_rect.height = size.y;
}

void wxControlRenderer::DrawLabel(const wxBitmap& bitmap,
                                  wxCoord marginX, wxCoord marginY)
{
    m_dc.SetBackgroundMode(wxTRANSPARENT);
    m_dc.SetFont(m_window->GetFont());
    m_dc.SetTextForeground(m_window->GetForegroundColour());

    wxString label = m_window->GetLabel();
    if ( !label.empty() || bitmap.Ok() )
    {
        wxRect rectLabel = m_rect;
        if ( bitmap.Ok() )
        {
            rectLabel.Inflate(-marginX, -marginY);
        }

        wxControl *ctrl = wxStaticCast(m_window, wxControl);

        m_renderer->DrawButtonLabel(m_dc,
                                    label,