wxWidgets/src/generic/statusbr.cpp

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

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

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

#ifdef __BORLANDC__
#pragma hdrstop
#endif

#ifndef WX_PRECOMP
#include "wx/setup.h"
#include "wx/frame.h"
#include "wx/settings.h"
#include "wx/dcclient.h"
#endif

#include "wx/generic/statusbr.h"

#ifdef __WXMSW__
#include <windows.h>

#ifdef DrawText
#undef DrawText
#endif

#endif

#if !USE_SHARED_LIBRARY
IMPLEMENT_DYNAMIC_CLASS(wxStatusBar, wxWindow)

BEGIN_EVENT_TABLE(wxStatusBar, wxWindow)
    EVT_PAINT(wxStatusBar::OnPaint)
    EVT_SYS_COLOUR_CHANGED(wxStatusBar::OnSysColourChanged)
END_EVENT_TABLE()
#endif

// Default status border dimensions
#define         wxTHICK_LINE_BORDER 2
#define         wxTHICK_LINE_WIDTH  1

wxStatusBar::wxStatusBar(void)
{
  m_statusWidths = (int *) NULL;
  m_statusStrings = (wxString *) NULL;
  m_nFields = 0;
  m_borderX = wxTHICK_LINE_BORDER;
  m_borderY = wxTHICK_LINE_BORDER;
}

wxStatusBar::~wxStatusBar(void)
{
#   ifdef __WXMSW__
        SetFont(wxNullFont);
#   endif // MSW

    if ( m_statusWidths )
        delete[] m_statusWidths;
    if ( m_statusStrings )
        delete[] m_statusStrings;
}

bool wxStatusBar::Create(wxWindow *parent, wxWindowID id,
           const wxPoint& pos,
           const wxSize& size,
           long style,
           const wxString& name)
{
  m_statusWidths = (int *) NULL;
  m_statusStrings = (wxString *) NULL;
  m_nFields = 0;
  m_borderX = wxTHICK_LINE_BORDER;
  m_borderY = wxTHICK_LINE_BORDER;

  bool success = wxWindow::Create(parent, id, pos, size, style, name);

  // Don't wish this to be found as a child
  parent->GetChildren()->DeleteObject(this);

  InitColours();

  SetFont(m_defaultStatusBarFont);

  return success;
}

void wxStatusBar::SetFieldsCount(int number, const int widths[])
{
  m_nFields = number;

  if ( m_statusWidths )
    delete[] m_statusWidths;

  if ( m_statusStrings )
        delete[] m_statusStrings;

  m_statusStrings = new wxString[number];

  int i;
  for (i = 0; i < number; i++)
    m_statusStrings[i] = "";

    if ( widths )
          SetStatusWidths(number, widths);
}

void wxStatusBar::SetStatusText(const wxString& text, int number)
{
  if ((number < 0) || (number >= m_nFields))
    return;

  m_statusStrings[number] = text;

  Refresh();

#ifdef __WXMSW__
  // For some reason, this can cause major GDI problems - graphics
  // all over the place. E.g. in print previewing.
//  ::UpdateWindow((HWND) GetHWND());
#endif
}

wxString wxStatusBar::GetStatusText(int n) const
{
  if ((n < 0) || (n >= m_nFields))
    return wxString("");
  else
    return m_statusStrings[n];
}

void wxStatusBar::SetStatusWidths(int n, const int widths_field[])
{
  // only set status widths, when n == number of statuswindows
  if (n == m_nFields)
  {
    // only set status widths,
    // when one window (minimum) is variable (width <= 0)
    bool is_variable = FALSE;
    int i;
    for (i = 0; i < m_nFields; i++)
    {
      if (widths_field[i] <= 0) is_variable = TRUE;
    }

    // if there are old widths, delete them
    if (m_statusWidths)
      delete [] m_statusWidths;

    // set widths
    m_statusWidths = new int[n];
    for (i = 0; i < m_nFields; i++)
    {
      m_statusWidths[i] = widths_field[i];
    }
  }
}

void wxStatusBar::OnPaint(wxPaintEvent& WXUNUSED(event) )
{
  wxPaintDC dc(this);

  int i;
  if ( GetFont() )
    dc.SetFont(*GetFont());
  dc.SetBackgroundMode(wxTRANSPARENT);

  for ( i = 0; i < m_nFields; i ++ )
    DrawField(dc, i);

#   ifdef __WXMSW__
        dc.SetFont(wxNullFont);
#   endif // MSW
}

void wxStatusBar::DrawFieldText(wxDC& dc, int i)
{
  int leftMargin = 2;

  wxRectangle rect;
  GetFieldRect(i, rect);

  wxString text(GetStatusText(i));

  long x, y;

  dc.GetTextExtent(text, &x, &y);

  int xpos = rect.x + leftMargin;
  int ypos = (int) (((rect.height - y) / 2 ) + rect.y + 0.5) ;

  dc.SetClippingRegion(rect.x, rect.y, rect.width, rect.height);

  dc.DrawText(text, xpos, ypos);

  dc.DestroyClippingRegion();
}

void wxStatusBar::DrawField(wxDC& dc, int i)
{
  wxRectangle rect;
  GetFieldRect(i, rect);

    // Draw border
    // Have grey background, plus 3-d border -
    // One black rectangle.
    // Inside this, left and top sides - dark grey. Bottom and right -
    // white.

    dc.SetPen(m_hilightPen);

    // Right and bottom white lines
    dc.DrawLine(rect.x + rect.width, rect.y,
                rect.x + rect.width, rect.y + rect.height);
    dc.DrawLine(rect.x + rect.width, rect.y + rect.height,
                rect.x, rect.y + rect.height);

    dc.SetPen(m_mediumShadowPen);

    // Left and top grey lines
    dc.DrawLine(rect.x, rect.y + rect.height,
           rect.x, rect.y);
    dc.DrawLine(rect.x, rect.y,
        rect.x + rect.width, rect.y);

    DrawFieldText(dc, i);
}

  // Get the position and size of the field's internal bounding rectangle
bool wxStatusBar::GetFieldRect(int n, wxRectangle& rect) const
{
  if ((n < 0) || (n >= m_nFields))
    return FALSE;

  int width, height;
  GetClientSize(&width, &height);

  int i;
  int sum_of_nonvar = 0;
  int num_of_var = 0;
  bool do_same_width = FALSE;

  int fieldWidth = 0;
  int fieldPosition = 0;

  if (m_statusWidths)
  {
    // if sum(not variable Windows) > c_width - (20 points per variable_window)
    // then do_same_width = TRUE;
    for (i = 0; i < m_nFields; i++)
    {
       if (m_statusWidths[i] > 0) sum_of_nonvar += m_statusWidths[i];
        else num_of_var++;
     }
     if (sum_of_nonvar > (width - 20*num_of_var)) do_same_width = TRUE;
  }
  else do_same_width = TRUE;
  if (do_same_width)
  {
    for (i = 0; i < m_nFields; i++)
    {
      fieldWidth = (int)(width/m_nFields);
      fieldPosition = i*fieldWidth;
      if ( i == n )
        break;
    }
  }
  else // no_same_width
  {
    int *tempwidth = new int[m_nFields];
    int temppos = 0;
    for (i = 0; i < m_nFields; i++)
    {
      if (m_statusWidths[i] > 0) tempwidth[i] = m_statusWidths[i];
      else tempwidth[i] = (width - sum_of_nonvar) / num_of_var;
    }
    for (i = 0; i < m_nFields; i++)
    {
        fieldWidth = tempwidth[i];
        fieldPosition = temppos;

          temppos += tempwidth[i];

        if ( i == n )
            break;
    }
    delete [] tempwidth;
  }

    rect.x = fieldPosition + wxTHICK_LINE_BORDER;
    rect.y = wxTHICK_LINE_BORDER;

    rect.width = fieldWidth - 2 * wxTHICK_LINE_BORDER ;
    rect.height = height - 2 * wxTHICK_LINE_BORDER ;

    return TRUE;
}

// Initialize colours
void wxStatusBar::InitColours(void)
{
    // Shadow colours
#if defined(__WIN95__)
    wxColour mediumShadowColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DSHADOW));
    m_mediumShadowPen = wxPen(mediumShadowColour, 1, wxSOLID);

    wxColour hilightColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DHILIGHT));
    m_hilightPen = wxPen(hilightColour, 1, wxSOLID);
#else
    m_mediumShadowPen = wxPen("GREY", 1, wxSOLID);
    m_hilightPen = wxPen("WHITE", 1, wxSOLID);
#endif

    m_defaultStatusBarFont = wxSystemSettings::GetSystemFont(wxSYS_DEFAULT_GUI_FONT);
    SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE));
}

// Responds to colour changes, and passes event on to children.
void wxStatusBar::OnSysColourChanged(wxSysColourChangedEvent& event)
{
    InitColours();
    Refresh();

    // Propagate the event to the non-top-level children
    wxWindow::OnSysColourChanged(event);
}