pictwind.h

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//----------------------------------------------------------------------------
// ObjectWindows
// Copyright (c) 1995, 1996 by Borland International, All Rights Reserved
//
/// \file
/// Definition of class TPictureWindow
//----------------------------------------------------------------------------
 
#if !defined(OWL_PICTWIND_H)
#define OWL_PICTWIND_H
 
#include <owl/private/defs.h>
#if defined(BI_HAS_PRAGMA_ONCE)
# pragma once
#endif
 
#include <owl/window.h>
 
namespace owl {
 
 
#include <owl/preclass.h>
 
 
class _OWLCLASS TDib;
 
/// \addtogroup ctrl
/// @{
/// \class TPictureWindow
// ~~~~~ ~~~~~~~~~~~~~~
/// This class displays a dib in a window in different ways.
/// The dib is owned by the window and will be deleted when the window is
/// deleted.
//
class _OWLCLASS TPictureWindow : public TWindow {
  public:
 
    /// How to display the bitmap within the window
    //
    enum TDisplayHow {
      UpperLeft = 0,      ///< Displays the DIB in the upper left corner of the window
      Center,             ///< Always centered
      Stretch,            ///< Stretch to fit or shrink to fit
      // Scroll,             // implies Upperleft  ///TH to be implemented
    };
 
    // constructor and destructor
    //
    TPictureWindow(TWindow* parent, TDib* dib, TDisplayHow = UpperLeft,
                   LPCTSTR title = 0, TModule* module = 0);
 
    TPictureWindow(
      TWindow* parent,
      TDib* dib,
      TDisplayHow,
      const tstring& title,
      TModule* module = 0);
 
    ~TPictureWindow();
 
    // Use new dib and return old dib
    //
    TDib*       SetDib(TDib* newDib);
    TDib*       GetDib() const;
 
    void        SetHowToDisplay(TDisplayHow how);
    TDisplayHow GetHowToDisplay() const;
 
    // overridden from TWindow for CS_HREDRAW and CS_VREDRAW
    //
    virtual auto GetWindowClassName() -> TWindowClassName;
    void      GetWindowClass(WNDCLASS& wndClass);
 
  protected:
    void Paint(TDC& dc, bool erase, TRect& rect);
 
  private:
    TDib* Dib;
    TDisplayHow HowToDisplay;
};
/// @}
 
#include <owl/posclass.h>
 
 
//----------------------------------------------------------------------------
// Inline implementations
//
 
//
// Return the dib.
//
inline TDib*
TPictureWindow::GetDib() const
{
  return Dib;
}
 
//
// Return how the picture is displayed.
//
inline TPictureWindow::TDisplayHow
TPictureWindow::GetHowToDisplay() const
{
  return HowToDisplay;
}
 
} // OWL namespace
 
 
#endif  // OWL_PICTWIND_H