fixed an over-optimisation

[wxWidgets.git] / src / msw / control.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        control.cpp
// Purpose:     wxControl class
// Author:      Julian Smart
// Modified by:
// Created:     01/02/97
// RCS-ID:      $Id$
// Copyright:   (c) Julian Smart and Markus Holzem
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#ifdef __GNUG__
#pragma implementation "control.h"
#endif

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

#ifdef __BORLANDC__
#pragma hdrstop
#endif

#ifndef WX_PRECOMP
#include "wx/event.h"
#include "wx/app.h"
#include "wx/dcclient.h"
#endif

#include "wx/control.h"

#include "wx/msw/private.h"

#if (defined(__WIN95__) && !defined(__GNUWIN32__)) || defined(__TWIN32__)
#include <commctrl.h>
#endif

#ifdef GetCharWidth
#undef GetCharWidth
#undef GetWindowProc
#endif

#if !USE_SHARED_LIBRARY
IMPLEMENT_ABSTRACT_CLASS(wxControl, wxWindow)

BEGIN_EVENT_TABLE(wxControl, wxWindow)
    EVT_ERASE_BACKGROUND(wxControl::OnEraseBackground)
END_EVENT_TABLE()
#endif

// Item members
wxControl::wxControl(void)
{
  m_backgroundColour = *wxWHITE;
  m_foregroundColour = *wxBLACK;
  m_callback = 0;
//  m_windowCursor = wxNullCursor; // To avoid the standard cursor being used
}

wxControl::~wxControl(void)
{
  m_isBeingDeleted = TRUE;

  // If we delete an item, we should initialize the parent panel,
  // because it could now be invalid.
  wxWindow *parent = (wxWindow *)GetParent();
  if (parent)
  {
    if (parent->GetDefaultItem() == (wxButton*) this)
        parent->SetDefaultItem(NULL);
  }
}

void wxControl::SetLabel(const wxString& label)
{
  if (GetHWND())
    SetWindowText((HWND) GetHWND(), (const char *)label);
}

wxString wxControl::GetLabel(void) const
{
    wxBuffer[0] = 0;
    if (GetHWND())
    {
        int len = GetWindowText((HWND)GetHWND(), wxBuffer, 256);
        wxBuffer[len] = 0;
    }

  return wxString(wxBuffer);
}

// Call this repeatedly for several wnds to find the overall size
// of the widget.
// Call it initially with -1 for all values in rect.
// Keep calling for other widgets, and rect will be modified
// to calculate largest bounding rectangle.
void wxFindMaxSize(WXHWND wnd, RECT *rect)
{
  int left = rect->left;
  int right = rect->right;
  int top = rect->top;
  int bottom = rect->bottom;

  GetWindowRect((HWND) wnd, rect);

  if (left < 0)
    return;

  if (left < rect->left)
    rect->left = left;

  if (right > rect->right)
    rect->right = right;

  if (top < rect->top)
    rect->top = top;

  if (bottom > rect->bottom)
    rect->bottom = bottom;

}

#ifdef __WIN95__
bool wxControl::MSWOnNotify(int idCtrl,
                            WXLPARAM lParam,
                            WXLPARAM* result)
{
    wxCommandEvent event(wxEVT_NULL, m_windowId);
    wxEventType eventType = wxEVT_NULL;
    NMHDR *hdr1 = (NMHDR*) lParam;
    switch ( hdr1->code )
    {
        case NM_CLICK:
            eventType = wxEVT_COMMAND_LEFT_CLICK;
            break;

        case NM_DBLCLK:
            eventType = wxEVT_COMMAND_LEFT_DCLICK;
            break;

        case NM_RCLICK:
            eventType = wxEVT_COMMAND_RIGHT_CLICK;
            break;

        case NM_RDBLCLK:
            eventType = wxEVT_COMMAND_RIGHT_DCLICK;
            break;

        case NM_SETFOCUS:
            eventType = wxEVT_COMMAND_SET_FOCUS;
            break;

        case NM_KILLFOCUS:
            eventType = wxEVT_COMMAND_KILL_FOCUS;
            break;

        case NM_RETURN:
            eventType = wxEVT_COMMAND_ENTER;
            break;

        default:
            return wxWindow::MSWOnNotify(idCtrl, lParam, result);
    }

    event.SetEventType(eventType);
    event.SetEventObject(this);

    return GetEventHandler()->ProcessEvent(event);
}
#endif // Win95

void wxControl::ProcessCommand (wxCommandEvent & event)
{
  // Tries:
  // 1) A callback function (to become obsolete)
  // 2) OnCommand, starting at this window and working up parent hierarchy
  // 3) OnCommand then calls ProcessEvent to search the event tables.
  if (m_callback)
    {
      (void) (*(m_callback)) (*this, event);
    }
    else
    {
      GetEventHandler()->OnCommand(*this, event);
    }
}

void wxControl::OnEraseBackground(wxEraseEvent& event)
{
  // In general, you don't want to erase the background of a control,
  // or you'll get a flicker.
  // TODO: move this 'null' function into each control that
  // might flicker.

  RECT rect;
  ::GetClientRect((HWND) GetHWND(), &rect);

  HBRUSH hBrush = ::CreateSolidBrush(PALETTERGB(GetBackgroundColour().Red(), GetBackgroundColour().Green(), GetBackgroundColour().Blue()));
  int mode = ::SetMapMode((HDC) event.GetDC()->GetHDC(), MM_TEXT);

  ::FillRect ((HDC) event.GetDC()->GetHDC(), &rect, hBrush);
  ::DeleteObject(hBrush);
  ::SetMapMode((HDC) event.GetDC()->GetHDC(), mode);
}

void wxControl::SetClientSize (int width, int height)
{
  SetSize (-1, -1, width, height);
}

void wxControl::Centre (int direction)
{
  int x, y, width, height, panel_width, panel_height, new_x, new_y;

  wxWindow *parent = (wxWindow *) GetParent ();
  if (!parent)
    return;

  parent->GetClientSize (&panel_width, &panel_height);
  GetSize (&width, &height);
  GetPosition (&x, &y);

  new_x = x;
  new_y = y;

  if (direction & wxHORIZONTAL)
    new_x = (int) ((panel_width - width) / 2);

  if (direction & wxVERTICAL)
    new_y = (int) ((panel_height - height) / 2);

  SetSize (new_x, new_y, width, height);
  int temp_x, temp_y;
  GetPosition (&temp_x, &temp_y);
  GetPosition (&temp_x, &temp_y);
}