implemented (untested) work around for wxScrolledWindow painting bug

[wxWidgets.git] / include / wx / univ / renderer.h

///////////////////////////////////////////////////////////////////////////////
// Name:        wx/univ/renderer.h
// Purpose:     wxRenderer class declaration
// Author:      Vadim Zeitlin
// Modified by:
// Created:     06.08.00
// RCS-ID:      $Id$
// Copyright:   (c) 2000 SciTech Software, Inc. (www.scitechsoft.com)
// Licence:     wxWindows license
///////////////////////////////////////////////////////////////////////////////

/*
   wxRenderer class is used to draw all wxWindows controls. This is an ABC and
   the look of the application is determined by the concrete derivation of
   wxRenderer used in the program.

   It also contains a few static methods which may be used by the concrete
   renderers and provide the functionality which is often similar or identical
   in all renderers (using inheritance here would be more restrictive as the
   given concrete renderer may need an arbitrary subset of the base class
   methods)
 */

#ifdef __GNUG__
    #pragma interface "renderer.h"
#endif

#ifndef _WX_UNIV_RENDERER_H_
#define _WX_UNIV_RENDERER_H_

class WXDLLEXPORT wxDC;
class WXDLLEXPORT wxCheckListBox;
class WXDLLEXPORT wxListBox;
class WXDLLEXPORT wxMenu;
class WXDLLEXPORT wxMenuGeometryInfo;
class WXDLLEXPORT wxScrollBar;
class WXDLLEXPORT wxTextCtrl;
class WXDLLEXPORT wxWindow;
#if wxUSE_GAUGE
class WXDLLEXPORT wxGauge;
#endif // wxUSE_GAUGE

#include "wx/string.h"
#include "wx/gdicmn.h"
#include "wx/scrolbar.h"            // for wxScrollBar::Element

// ----------------------------------------------------------------------------
// wxRenderer: abstract renderers interface
// ----------------------------------------------------------------------------

class WXDLLEXPORT wxRenderer
{
public:
    // drawing functions
    // -----------------

    // draw the controls background
    virtual void DrawBackground(wxDC& dc,
                                const wxColour& col,
                                const wxRect& rect,
                                int flags) = 0;

    // draw the label inside the given rectangle with the specified alignment
    // and optionally emphasize the character with the given index
    virtual void DrawLabel(wxDC& dc,
                           const wxString& label,
                           const wxRect& rect,
                           int flags = 0,
                           int alignment = wxALIGN_LEFT | wxALIGN_TOP,
                           int indexAccel = -1,
                           wxRect *rectBounds = NULL) = 0;

    // same but also draw a bitmap if it is valid
    virtual void DrawButtonLabel(wxDC& dc,
                                 const wxString& label,
                                 const wxBitmap& image,
                                 const wxRect& rect,
                                 int flags = 0,
                                 int alignment = wxALIGN_LEFT | wxALIGN_TOP,
                                 int indexAccel = -1,
                                 wxRect *rectBounds = NULL) = 0;

    // draw the border and optionally return the rectangle containing the
    // region inside the border
    virtual void DrawBorder(wxDC& dc,
                            wxBorder border,
                            const wxRect& rect,
                            int flags = 0,
                            wxRect *rectIn = (wxRect *)NULL) = 0;

    // draw text control border (I hate to have a separate method for this but
    // it is needed to accomodate GTK+)
    virtual void DrawTextBorder(wxDC& dc,
                                wxBorder border,
                                const wxRect& rect,
                                int flags = 0,
                                wxRect *rectIn = (wxRect *)NULL) = 0;

    // draw push button border and return the rectangle left for the label
    virtual void DrawButtonBorder(wxDC& dc,
                                  const wxRect& rect,
                                  int flags = 0,
                                  wxRect *rectIn = (wxRect *)NULL) = 0;

    // draw a horizontal line
    virtual void DrawHorizontalLine(wxDC& dc,
                                    wxCoord y, wxCoord x1, wxCoord x2) = 0;

    // draw a vertical line
    virtual void DrawVerticalLine(wxDC& dc,
                                  wxCoord x, wxCoord y1, wxCoord y2) = 0;

    // draw a frame with the label (horizontal alignment can be specified)
    virtual void DrawFrame(wxDC& dc,
                           const wxString& label,
                           const wxRect& rect,
                           int flags = 0,
                           int alignment = wxALIGN_LEFT,
                           int indexAccel = -1) = 0;

    // draw an arrow in the given direction
    virtual void DrawArrow(wxDC& dc,
                           wxDirection dir,
                           const wxRect& rect,
                           int flags = 0) = 0;

    // draw a scrollbar arrow (may be the same as arrow but may be not)
    virtual void DrawScrollbarArrow(wxDC& dc,
                                    wxDirection dir,
                                    const wxRect& rect,
                                    int flags = 0) = 0;

    // draw the scrollbar thumb
    virtual void DrawScrollbarThumb(wxDC& dc,
                                    wxOrientation orient,
                                    const wxRect& rect,
                                    int flags = 0) = 0;

    // draw a (part of) scrollbar shaft
    virtual void DrawScrollbarShaft(wxDC& dc,
                                    wxOrientation orient,
                                    const wxRect& rect,
                                    int flags = 0) = 0;

    // draw the rectangle in the corner between two scrollbars
    virtual void DrawScrollCorner(wxDC& dc,
                                  const wxRect& rect) = 0;

    // draw an item of a wxListBox
    virtual void DrawItem(wxDC& dc,
                          const wxString& label,
                          const wxRect& rect,
                          int flags = 0) = 0;

    // draw an item of a wxCheckListBox
    virtual void DrawCheckItem(wxDC& dc,
                               const wxString& label,
                               const wxBitmap& bitmap,
                               const wxRect& rect,
                               int flags = 0) = 0;

    // draw a checkbutton (bitmap may be invalid to use default one)
    virtual void DrawCheckButton(wxDC& dc,
                                 const wxString& label,
                                 const wxBitmap& bitmap,
                                 const wxRect& rect,
                                 int flags = 0,
                                 wxAlignment align = wxALIGN_LEFT,
                                 int indexAccel = -1) = 0;

    // draw a radio button
    virtual void DrawRadioButton(wxDC& dc,
                                 const wxString& label,
                                 const wxBitmap& bitmap,
                                 const wxRect& rect,
                                 int flags = 0,
                                 wxAlignment align = wxALIGN_LEFT,
                                 int indexAccel = -1) = 0;

    // draw a (part of) line in the text control
    virtual void DrawTextLine(wxDC& dc,
                              const wxString& text,
                              const wxRect& rect,
                              int selStart = -1,
                              int selEnd = -1,
                              int flags = 0) = 0;

    // draw a line wrap indicator
    virtual void DrawLineWrapMark(wxDC& dc, const wxRect& rect) = 0;

    // draw a notebook tab
    virtual void DrawTab(wxDC& dc,
                         const wxRect& rect,
                         wxDirection dir,
                         const wxString& label,
                         const wxBitmap& bitmap = wxNullBitmap,
                         int flags = 0,
                         int indexAccel = -1) = 0;

    // draw the slider shaft
    virtual void DrawSliderShaft(wxDC& dc,
                                 const wxRect& rect,
                                 wxOrientation orient,
                                 int flags = 0,
                                 wxRect *rectShaft = NULL) = 0;

    // draw the slider thumb
    virtual void DrawSliderThumb(wxDC& dc,
                                 const wxRect& rect,
                                 wxOrientation orient,
                                 int flags = 0) = 0;

    // draw the slider ticks
    virtual void DrawSliderTicks(wxDC& dc,
                                 const wxRect& rect,
                                 const wxSize& sizeThumb,
                                 wxOrientation orient,
                                 int start,
                                 int end,
                                 int step = 1,
                                 int flags = 0) = 0;

#if wxUSE_MENUS
    // draw a menu bar item
    virtual void DrawMenuBarItem(wxDC& dc,
                                 const wxRect& rect,
                                 const wxString& label,
                                 int flags = 0,
                                 int indexAccel = -1) = 0;

    // draw a menu item (also used for submenus if flags has ISSUBMENU flag)
    //
    // the geometryInfo is calculated by GetMenuGeometry() function from below
    virtual void DrawMenuItem(wxDC& dc,
                              wxCoord y,
                              const wxMenuGeometryInfo& geometryInfo,
                              const wxString& label,
                              const wxString& accel,
                              const wxBitmap& bitmap = wxNullBitmap,
                              int flags = 0,
                              int indexAccel = -1) = 0;

    // draw a menu bar separator
    virtual void DrawMenuSeparator(wxDC& dc,
                                   wxCoord y,
                                   const wxMenuGeometryInfo& geomInfo) = 0;
#endif
    // misc functions
    // --------------

    // return the bitmaps to use for combobox button
    virtual void GetComboBitmaps(wxBitmap *bmpNormal,
                                 wxBitmap *bmpFocus,
                                 wxBitmap *bmpPressed,
                                 wxBitmap *bmpDisabled) = 0;

    // geometry functions
    // ------------------

    // get the dimensions of the border: rect.x/y contain the width/height of
    // the left/top side, width/heigh - of the right/bottom one
    virtual wxRect GetBorderDimensions(wxBorder border) const = 0;

    // the scrollbars may be drawn either inside the window border or outside
    // it - this function is used to decide how to draw them
    virtual bool AreScrollbarsInsideBorder() const = 0;

    // adjust the size of the control of the given class: for most controls,
    // this just takes into account the border, but for some (buttons, for
    // example) it is more complicated - the result being, in any case, that
    // the control looks "nice" if it uses the adjusted rectangle
    virtual void AdjustSize(wxSize *size, const wxWindow *window) = 0;

    // get the size of a scrollbar arrow
    virtual wxSize GetScrollbarArrowSize() const = 0;

    // gets the bounding box for a scrollbar element for the given (by default
    // - current) thumb position
    virtual wxRect GetScrollbarRect(const wxScrollBar *scrollbar,
                                    wxScrollBar::Element elem,
                                    int thumbPos = -1) const = 0;

    // returns the size of the scrollbar shaft excluding the arrows
    virtual wxCoord GetScrollbarSize(const wxScrollBar *scrollbar) = 0;

    // returns one of wxHT_SCROLLBAR_XXX constants
    virtual wxHitTest HitTestScrollbar(const wxScrollBar *scrollbar,
                                       const wxPoint& pt) const = 0;

    // translate the scrollbar position (in logical units) into physical
    // coordinate (in pixels) and the other way round
    virtual wxCoord ScrollbarToPixel(const wxScrollBar *scrollbar,
                                     int thumbPos = -1) = 0;
    virtual int PixelToScrollbar(const wxScrollBar *scrollbar,
                                 wxCoord coord) = 0;

    // get the height of a listbox item from the base font height
    virtual wxCoord GetListboxItemHeight(wxCoord fontHeight) = 0;

    // get the size of a checkbox/radio button bitmap
    virtual wxSize GetCheckBitmapSize() const = 0;
    virtual wxSize GetRadioBitmapSize() const = 0;
    virtual wxCoord GetCheckItemMargin() const = 0;

    // convert between text rectangle and client rectangle for text controls:
    // the former is typicall smaller to leave margins around text
    virtual wxRect GetTextTotalArea(const wxTextCtrl *text,
                                    const wxRect& rectText) = 0;

    // extra space is for line indicators
    virtual wxRect GetTextClientArea(const wxTextCtrl *text,
                                     const wxRect& rectTotal,
                                     wxCoord *extraSpaceBeyond) = 0;

    // get the overhang of a selected tab
    virtual wxSize GetTabIndent() const = 0;

    // get the padding around the text in a tab
    virtual wxSize GetTabPadding() const = 0;

    // get the default size of the slider in lesser dimension (i.e. height of a
    // horizontal slider or width of a vertical one)
    virtual wxCoord GetSliderDim() const = 0;

    // get the length of the slider ticks displayed along side slider
    virtual wxCoord GetSliderTickLen() const = 0;

    // get the slider shaft rect from the total slider rect
    virtual wxRect GetSliderShaftRect(const wxRect& rect,
                                      wxOrientation orient) const = 0;

    // get the size of the slider thumb for the given total slider rect
    virtual wxSize GetSliderThumbSize(const wxRect& rect,
                                      wxOrientation orient) const = 0;

    // get the size of one progress bar step (in horz and vertical directions)
    virtual wxSize GetProgressBarStep() const = 0;

#if wxUSE_MENUS
    // get the size of rectangle to use in the menubar for the given text rect
    virtual wxSize GetMenuBarItemSize(const wxSize& sizeText) const = 0;

    // get the struct storing all layout info needed to draw all menu items
    // (this can't be calculated for each item separately as they should be
    // aligned)
    //
    // the returned pointer must be deleted by the caller
    virtual wxMenuGeometryInfo *GetMenuGeometry(wxWindow *win,
                                                const wxMenu& menu) const = 0;
#endif
    // virtual dtor for any base class
    virtual ~wxRenderer();

protected:
    // draw a frame around rectFrame rectangle but not touching the rectLabel
    // one: this is used by DrawFrame()
    void StandardDrawFrame(wxDC& dc,
                           const wxRect& rectFrame,
                           const wxRect& rectLabel);

    // standard text line drawing: just use DrawText() and highlight the
    // selected part
    static void StandardDrawTextLine(wxDC& dc,
                                     const wxString& text,
                                     const wxRect& rect,
                                     int selStart, int selEnd,
                                     int flags);

    // standard scrollbar hit testing: this assumes that it only has 2 arrows
    // and a thumb, so the themes which have more complicated scrollbars (e.g.
    // BeOS) can't use this method
    static wxRect StandardGetScrollbarRect(const wxScrollBar *scrollbar,
                                           wxScrollBar::Element elem,
                                           int thumbPos,
                                           const wxSize& sizeArrow);
    static wxHitTest StandardHitTestScrollbar(const wxScrollBar *scrollbar,
                                              const wxPoint& pt,
                                              const wxSize& sizeArrow);
    static wxCoord StandardScrollbarToPixel(const wxScrollBar *scrollbar,
                                            int thumbPos,
                                            const wxSize& sizeArrow);
    static int StandardPixelToScrollbar(const wxScrollBar *scrollbar,
                                        wxCoord coord,
                                        const wxSize& sizeArrow);
    static wxCoord StandardScrollBarSize(const wxScrollBar *scrollbar,
                                         const wxSize& sizeArrow);
    static void StandardScrollBarThumbSize(wxCoord lenBar,
                                           int thumbPos,
                                           int thumbSize,
                                           int range,
                                           wxCoord *thumbStart,
                                           wxCoord *thumbEnd);
};

// ----------------------------------------------------------------------------
// wxDelegateRenderer: it is impossible to inherit from any of standard
// renderers as their declarations are in private code, but you can use this
// class to override only some of the Draw() functions - all the other ones
// will be left to the original renderer
// ----------------------------------------------------------------------------

class WXDLLEXPORT wxDelegateRenderer : public wxRenderer
{
public:
    wxDelegateRenderer(wxRenderer *renderer) : m_renderer(renderer) { }

    virtual void DrawBackground(wxDC& dc,
                                const wxColour& col,
                                const wxRect& rect,
                                int flags)
        { m_renderer->DrawBackground(dc, col, rect, flags); }
    virtual void DrawLabel(wxDC& dc,
                           const wxString& label,
                           const wxRect& rect,
                           int flags = 0,
                           int align = wxALIGN_LEFT | wxALIGN_TOP,
                           int indexAccel = -1,
                           wxRect *rectBounds = NULL)
        { m_renderer->DrawLabel(dc, label, rect,
                                flags, align, indexAccel, rectBounds); }
    virtual void DrawButtonLabel(wxDC& dc,
                                 const wxString& label,
                                 const wxBitmap& image,
                                 const wxRect& rect,
                                 int flags = 0,
                                 int align = wxALIGN_LEFT | wxALIGN_TOP,
                                 int indexAccel = -1,
                                 wxRect *rectBounds = NULL)
        { m_renderer->DrawButtonLabel(dc, label, image, rect,
                                      flags, align, indexAccel, rectBounds); }
    virtual void DrawBorder(wxDC& dc,
                            wxBorder border,
                            const wxRect& rect,
                            int flags = 0,
                            wxRect *rectIn = (wxRect *)NULL)
        { m_renderer->DrawBorder(dc, border, rect, flags, rectIn); }
    virtual void DrawTextBorder(wxDC& dc,
                                wxBorder border,
                                const wxRect& rect,
                                int flags = 0,
                                wxRect *rectIn = (wxRect *)NULL)
        { m_renderer->DrawTextBorder(dc, border, rect, flags, rectIn); }
    virtual void DrawButtonBorder(wxDC& dc,
                                  const wxRect& rect,
                                  int flags = 0,
                                  wxRect *rectIn = (wxRect *)NULL)
        { m_renderer->DrawButtonBorder(dc, rect, flags, rectIn); }
    virtual void DrawFrame(wxDC& dc,
                           const wxString& label,
                           const wxRect& rect,
                           int flags = 0,
                           int align = wxALIGN_LEFT,
                           int indexAccel = -1)
        { m_renderer->DrawFrame(dc, label, rect, flags, align, indexAccel); }
    virtual void DrawHorizontalLine(wxDC& dc,
                                    wxCoord y, wxCoord x1, wxCoord x2)
        { m_renderer->DrawHorizontalLine(dc, y, x1, x2); }
    virtual void DrawVerticalLine(wxDC& dc,
                                  wxCoord x, wxCoord y1, wxCoord y2)
        { m_renderer->DrawVerticalLine(dc, x, y1, y2); }
    virtual void DrawArrow(wxDC& dc,
                           wxDirection dir,
                           const wxRect& rect,
                           int flags = 0)
        { m_renderer->DrawArrow(dc, dir, rect, flags); }
    virtual void DrawScrollbarArrow(wxDC& dc,
                           wxDirection dir,
                           const wxRect& rect,
                           int flags = 0)
        { m_renderer->DrawScrollbarArrow(dc, dir, rect, flags); }
    virtual void DrawScrollbarThumb(wxDC& dc,
                                    wxOrientation orient,
                                    const wxRect& rect,
                                    int flags = 0)
        { m_renderer->DrawScrollbarThumb(dc, orient, rect, flags); }
    virtual void DrawScrollbarShaft(wxDC& dc,
                                    wxOrientation orient,
                                    const wxRect& rect,
                                    int flags = 0)
        { m_renderer->DrawScrollbarShaft(dc, orient, rect, flags); }
    virtual void DrawScrollCorner(wxDC& dc,
                                  const wxRect& rect)
        { m_renderer->DrawScrollCorner(dc, rect); }
    virtual void DrawItem(wxDC& dc,
                          const wxString& label,
                          const wxRect& rect,
                          int flags = 0)
        { m_renderer->DrawItem(dc, label, rect, flags); }
    virtual void DrawCheckItem(wxDC& dc,
                               const wxString& label,
                               const wxBitmap& bitmap,
                               const wxRect& rect,
                               int flags = 0)
        { m_renderer->DrawCheckItem(dc, label, bitmap, rect, flags); }
    virtual void DrawCheckButton(wxDC& dc,
                                 const wxString& label,
                                 const wxBitmap& bitmap,
                                 const wxRect& rect,
                                 int flags = 0,
                                 wxAlignment align = wxALIGN_LEFT,
                                 int indexAccel = -1)
        { m_renderer->DrawCheckButton(dc, label, bitmap, rect,
                                      flags, align, indexAccel); }
    virtual void DrawRadioButton(wxDC& dc,
                                 const wxString& label,
                                 const wxBitmap& bitmap,
                                 const wxRect& rect,
                                 int flags = 0,
                                 wxAlignment align = wxALIGN_LEFT,
                                 int indexAccel = -1)
        { m_renderer->DrawRadioButton(dc, label, bitmap, rect,
                                      flags, align, indexAccel); }
    virtual void DrawTextLine(wxDC& dc,
                              const wxString& text,
                              const wxRect& rect,
                              int selStart = -1,
                              int selEnd = -1)
        { m_renderer->DrawTextLine(dc, text, rect, selStart, selEnd); }
    virtual void DrawLineWrapMark(wxDC& dc, const wxRect& rect)
        { m_renderer->DrawLineWrapMark(dc, rect); }

    virtual void DrawTab(wxDC& dc,
                         const wxRect& rect,
                         wxDirection dir,
                         const wxString& label,
                         const wxBitmap& bitmap = wxNullBitmap,
                         int flags = 0,
                         int accel = -1)
        { m_renderer->DrawTab(dc, rect, dir, label, bitmap, flags, accel); }

    virtual void DrawSliderShaft(wxDC& dc,
                                 const wxRect& rect,
                                 wxOrientation orient,
                                 int flags = 0,
                                 wxRect *rectShaft = NULL)
        { m_renderer->DrawSliderShaft(dc, rect, orient, flags, rectShaft); }
    virtual void DrawSliderThumb(wxDC& dc,
                                 const wxRect& rect,
                                 wxOrientation orient,
                                 int flags = 0)
        { m_renderer->DrawSliderThumb(dc, rect, orient, flags); }
    virtual void DrawSliderTicks(wxDC& dc,
                                 const wxRect& rect,
                                 const wxSize& sizeThumb,
                                 wxOrientation orient,
                                 int start,
                                 int end,
                                 int step = 1,
                                 int flags = 0)
        { m_renderer->DrawSliderTicks(dc, rect, sizeThumb, orient,
                                      start, end, start, flags); }
#if wxUSE_MENUS

    virtual void DrawMenuBarItem(wxDC& dc,
                                 const wxRect& rect,
                                 const wxString& label,
                                 int flags = 0,
                                 int indexAccel = -1)
        { m_renderer->DrawMenuBarItem(dc, rect, label, flags, indexAccel); }
    virtual void DrawMenuItem(wxDC& dc,
                              wxCoord y,
                              const wxMenuGeometryInfo& gi,
                              const wxString& label,
                              const wxString& accel,
                              const wxBitmap& bitmap = wxNullBitmap,
                              int flags = 0,
                              int indexAccel = -1)
        { m_renderer->DrawMenuItem(dc, y, gi, label, accel,
                                   bitmap, flags, indexAccel); }
    virtual void DrawMenuSeparator(wxDC& dc,
                                   wxCoord y,
                                   const wxMenuGeometryInfo& geomInfo)
        { m_renderer->DrawMenuSeparator(dc, y, geomInfo); }
#endif
    virtual void GetComboBitmaps(wxBitmap *bmpNormal,
                                 wxBitmap *bmpFocus,
                                 wxBitmap *bmpPressed,
                                 wxBitmap *bmpDisabled)
        { m_renderer->GetComboBitmaps(bmpNormal, bmpFocus,
                                      bmpPressed, bmpDisabled); }

    virtual void AdjustSize(wxSize *size, const wxWindow *window)
        { m_renderer->AdjustSize(size, window); }
    virtual wxRect GetBorderDimensions(wxBorder border) const
        { return m_renderer->GetBorderDimensions(border); }
    virtual bool AreScrollbarsInsideBorder() const
        { return m_renderer->AreScrollbarsInsideBorder(); }

    virtual wxSize GetScrollbarArrowSize() const
        { return m_renderer->GetScrollbarArrowSize(); }
    virtual wxRect GetScrollbarRect(const wxScrollBar *scrollbar,
                                    wxScrollBar::Element elem,
                                    int thumbPos = -1) const
        { return m_renderer->GetScrollbarRect(scrollbar, elem, thumbPos); }
    virtual wxCoord GetScrollbarSize(const wxScrollBar *scrollbar)
        { return m_renderer->GetScrollbarSize(scrollbar); }
    virtual wxHitTest HitTestScrollbar(const wxScrollBar *scrollbar,
                                       const wxPoint& pt) const
        { return m_renderer->HitTestScrollbar(scrollbar, pt); }
    virtual wxCoord ScrollbarToPixel(const wxScrollBar *scrollbar,
                                     int thumbPos = -1)
        { return m_renderer->ScrollbarToPixel(scrollbar, thumbPos); }
    virtual int PixelToScrollbar(const wxScrollBar *scrollbar,
                                 wxCoord coord)
        { return m_renderer->PixelToScrollbar(scrollbar, coord); }
    virtual wxCoord GetListboxItemHeight(wxCoord fontHeight)
        { return m_renderer->GetListboxItemHeight(fontHeight); }
    virtual wxSize GetCheckBitmapSize() const
        { return m_renderer->GetCheckBitmapSize(); }
    virtual wxSize GetRadioBitmapSize() const
        { return m_renderer->GetRadioBitmapSize(); }
    virtual wxCoord GetCheckItemMargin() const
        { return m_renderer->GetCheckItemMargin(); }

    virtual wxRect GetTextTotalArea(const wxTextCtrl *text, const wxRect& rect)
        { return m_renderer->GetTextTotalArea(text, rect); }
    virtual wxRect GetTextClientArea(const wxTextCtrl *text,
                                     const wxRect& rect,
                                     wxCoord *extraSpaceBeyond)
        { return m_renderer->GetTextClientArea(text, rect, extraSpaceBeyond); }

    virtual wxSize GetTabIndent() const { return m_renderer->GetTabIndent(); }
    virtual wxSize GetTabPadding() const { return m_renderer->GetTabPadding(); }

    virtual wxCoord GetSliderDim() const
        { return m_renderer->GetSliderDim(); }
    virtual wxCoord GetSliderTickLen() const
        { return m_renderer->GetSliderTickLen(); }
    virtual wxRect GetSliderShaftRect(const wxRect& rect,
                                      wxOrientation orient) const
        { return GetSliderShaftRect(rect, orient); }
    virtual wxSize GetSliderThumbSize(const wxRect& rect,
                                      wxOrientation orient) const
        { return m_renderer->GetSliderThumbSize(rect, orient); }
    virtual wxSize GetProgressBarStep() const
        { return m_renderer->GetProgressBarStep(); }
#if wxUSE_MENUS
    virtual wxSize GetMenuBarItemSize(const wxSize& sizeText) const
        { return m_renderer->GetMenuBarItemSize(sizeText); }
    virtual wxMenuGeometryInfo *GetMenuGeometry(wxWindow *win,
                                                const wxMenu& menu) const
        { return m_renderer->GetMenuGeometry(win, menu); }
#endif
protected:
    wxRenderer *m_renderer;
};

// ----------------------------------------------------------------------------
// wxControlRenderer: wraps the wxRenderer functions in a form easy to use from
// OnPaint()
// ----------------------------------------------------------------------------

class WXDLLEXPORT wxControlRenderer
{
public:
    // create a renderer for this dc with this "fundamental" renderer
    wxControlRenderer(wxWindow *control, wxDC& dc, wxRenderer *renderer);

    // operations
    void DrawLabel(const wxBitmap& bitmap = wxNullBitmap,
                   wxCoord marginX = 0, wxCoord marginY = 0);
#if wxUSE_LISTBOX
    void DrawItems(const wxListBox *listbox,
                   size_t itemFirst, size_t itemLast);
#endif // wxUSE_LISTBOX
#if wxUSE_CHECKLISTBOX
    void DrawCheckItems(const wxCheckListBox *listbox,
                        size_t itemFirst, size_t itemLast);
#endif // wxUSE_CHECKLISTBOX
    void DrawButtonBorder();
    // the line must be either horizontal or vertical
    void DrawLine(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2);
    void DrawFrame();
    void DrawBitmap(const wxBitmap& bitmap);
    void DrawBackgroundBitmap();
    void DrawScrollbar(const wxScrollBar *scrollbar, int thumbPosOld);
#if wxUSE_GAUGE
    void DrawProgressBar(const wxGauge *gauge);
#endif // wxUSE_GAUGE

    // accessors
    wxWindow *GetWindow() const { return m_window; }
    wxRenderer *GetRenderer() const { return m_renderer; }

    wxDC& GetDC() { return m_dc; }

    const wxRect& GetRect() const { return m_rect; }
    wxRect& GetRect() { return m_rect; }

    // static helpers
    static void DrawBitmap(wxDC &dc,
                           const wxBitmap& bitmap,
                           const wxRect& rect,
                           int alignment = wxALIGN_CENTRE |
                                           wxALIGN_CENTRE_VERTICAL,
                           wxStretch stretch = wxSTRETCH_NOT);

private:
    // common part of DrawItems() and DrawCheckItems()
    void DoDrawItems(const wxListBox *listbox,
                     size_t itemFirst, size_t itemLast,
                     bool isCheckLbox = FALSE);

    wxWindow *m_window;
    wxRenderer *m_renderer;
    wxDC& m_dc;
    wxRect m_rect;
};

#endif // _WX_UNIV_RENDERER_H_