src/msw/spinctrl.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        msw/spinctrl.cpp
   3 // Purpose:     wxSpinCtrl class implementation for Win32
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     22.07.99
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Vadim Zeitlin
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 #ifdef __GNUG__
  17     #pragma implementation "spinctrlbase.h"
  18     #pragma implementation "spinctrl.h"
  19 #endif
  20
  21 // ----------------------------------------------------------------------------
  22 // headers
  23 // ----------------------------------------------------------------------------
  24
  25 // for compilers that support precompilation, includes "wx.h".
  26 #include "wx/wxprec.h"
  27
  28 #ifdef __BORLANDC__
  29     #pragma hdrstop
  30 #endif
  31
  32 #ifndef WX_PRECOMP
  33     #include "wx/wx.h"
  34 #endif
  35
  36 #if defined(__WIN95__)
  37
  38 #include "wx/spinctrl.h"
  39 #include "wx/msw/private.h"
  40
  41 #if (defined(__WIN95__) && !defined(__GNUWIN32__)) || defined(__TWIN32__) || defined(wxUSE_NORLANDER_HEADERS)
  42     #include <commctrl.h>
  43 #endif
  44
  45 #include <limits.h>         // for INT_MIN
  46
  47 // ----------------------------------------------------------------------------
  48 // macros
  49 // ----------------------------------------------------------------------------
  50
  51 #if !USE_SHARED_LIBRARY
  52     IMPLEMENT_DYNAMIC_CLASS(wxSpinCtrl, wxControl)
  53 #endif
  54
  55 // ----------------------------------------------------------------------------
  56 // constants
  57 // ----------------------------------------------------------------------------
  58
  59 // the margin between the up-down control and its buddy (can be arbitrary,
  60 // choose what you like - or may be decide during run-time depending on the
  61 // font size?)
  62 static const int MARGIN_BETWEEN = 1;
  63
  64 // ============================================================================
  65 // implementation
  66 // ============================================================================
  67
  68 // ----------------------------------------------------------------------------
  69 // construction
  70 // ----------------------------------------------------------------------------
  71
  72 bool wxSpinCtrl::Create(wxWindow *parent,
  73                         wxWindowID id,
  74                         const wxString& value,
  75                         const wxPoint& pos,
  76                         const wxSize& size,
  77                         long style,
  78                         int min, int max, int initial,
  79                         const wxString& name)
  80 {
  81     // before using DoGetBestSize(), have to set style to let the base class
  82     // know whether this is a horizontal or vertical control (we're always
  83     // vertical)
  84     SetWindowStyle(style | wxSP_VERTICAL);
  85
  86     // calculate the sizes: the size given is the toal size for both controls
  87     // and we need to fit them both in the given width (height is the same)
  88     wxSize sizeText(size), sizeBtn(size);
  89     sizeBtn.x = wxSpinButton::DoGetBestSize().x;
  90     if ( sizeText.x <= 0 )
  91     {
  92         // DEFAULT_ITEM_WIDTH is the default width for the text control
  93         sizeText.x = DEFAULT_ITEM_WIDTH + MARGIN_BETWEEN + sizeBtn.x;
  94     }
  95
  96     sizeText.x -= sizeBtn.x + MARGIN_BETWEEN;
  97     if ( sizeText.x <= 0 )
  98     {
  99         wxLogDebug(_T("not enough space for wxSpinCtrl!"));
 100     }
 101
 102     wxPoint posBtn(pos);
 103     posBtn.x += sizeText.x + MARGIN_BETWEEN;
 104
 105     // create the spin button
 106     if ( !wxSpinButton::Create(parent, id, posBtn, sizeBtn, style, name) )
 107     {
 108         return FALSE;
 109     }
 110
 111     SetRange(min, max);
 112     SetValue(initial);
 113
 114     // create the text window
 115     m_hwndBuddy = (WXHWND)::CreateWindowEx
 116                     (
 117                      WS_EX_CLIENTEDGE,       // sunken border
 118                      _T("EDIT"),             // window class
 119                      NULL,                   // no window title
 120                      WS_CHILD | WS_BORDER,   // style (will be shown later)
 121                      pos.x, pos.y,           // position
 122                      0, 0,                   // size (will be set later)
 123                      GetHwndOf(parent),      // parent
 124                      (HMENU)-1,              // control id
 125                      wxGetInstance(),        // app instance
 126                      NULL                    // unused client data
 127                     );
 128
 129     if ( !m_hwndBuddy )
 130     {
 131         wxLogLastError("CreateWindow(buddy text window)");
 132
 133         return FALSE;
 134     }
 135
 136     // should have the same font as the other controls
 137     SetFont(GetParent()->GetFont());
 138
 139     // set the size of the text window - can do it only now, because we
 140     // couldn't call DoGetBestSize() before as font wasn't set
 141     if ( sizeText.y <= 0 )
 142     {
 143         // make it the same height as the button then
 144         sizeText.y = DoGetBestSize().y;
 145     }
 146
 147     DoMoveWindow(pos.x, pos.y,
 148                  sizeText.x + sizeBtn.x + MARGIN_BETWEEN, sizeText.y);
 149
 150     (void)::ShowWindow((HWND)m_hwndBuddy, SW_SHOW);
 151
 152     // associate the text window with the spin button
 153     (void)::SendMessage(GetHwnd(), UDM_SETBUDDY, (WPARAM)m_hwndBuddy, 0);
 154
 155     if ( !value.IsEmpty() )
 156     {
 157         SetValue(value);
 158     }
 159
 160     return TRUE;
 161 }
 162
 163 // ----------------------------------------------------------------------------
 164 // wxTextCtrl-like methods
 165 // ----------------------------------------------------------------------------
 166
 167 void wxSpinCtrl::SetValue(const wxString& text)
 168 {
 169     if ( ::SetWindowText((HWND)m_hwndBuddy, text.c_str()) )
 170     {
 171         wxLogLastError("SetWindowText(buddy)");
 172     }
 173 }
 174
 175 int wxSpinCtrl::GetValue() const
 176 {
 177     wxString val = wxGetWindowText(m_hwndBuddy);
 178
 179     long n;
 180     if ( (wxSscanf(val, wxT("%lu"), &n) != 1) )
 181         n = INT_MIN;
 182
 183     return n;
 184 }
 185
 186 // ----------------------------------------------------------------------------
 187 // when setting font, we need to do it for both controls
 188 // ----------------------------------------------------------------------------
 189
 190 bool wxSpinCtrl::SetFont(const wxFont& font)
 191 {
 192     if ( !wxWindowBase::SetFont(font) )
 193     {
 194         // nothing to do
 195         return FALSE;
 196     }
 197
 198     WXHANDLE hFont = GetFont().GetResourceHandle();
 199     (void)::SendMessage((HWND)m_hwndBuddy, WM_SETFONT, (WPARAM)hFont, TRUE);
 200
 201     return TRUE;
 202 }
 203
 204 // ----------------------------------------------------------------------------
 205 // size calculations
 206 // ----------------------------------------------------------------------------
 207
 208 wxSize wxSpinCtrl::DoGetBestSize()
 209 {
 210     wxSize sizeBtn = wxSpinButton::DoGetBestSize();
 211     sizeBtn.x += DEFAULT_ITEM_WIDTH + MARGIN_BETWEEN;
 212
 213     int y;
 214     wxGetCharSize(GetHWND(), NULL, &y, &GetFont());
 215     y = EDIT_HEIGHT_FROM_CHAR_HEIGHT(y);
 216
 217     if ( sizeBtn.y < y )
 218     {
 219         // make the text tall enough
 220         sizeBtn.y = y;
 221     }
 222
 223     return sizeBtn;
 224 }
 225
 226 void wxSpinCtrl::DoMoveWindow(int x, int y, int width, int height)
 227 {
 228     int widthBtn = wxSpinButton::DoGetBestSize().x;
 229     int widthText = width - widthBtn - MARGIN_BETWEEN;
 230     if ( widthText <= 0 )
 231     {
 232         wxLogDebug(_T("not enough space for wxSpinCtrl!"));
 233     }
 234
 235     if ( !::MoveWindow((HWND)m_hwndBuddy, x, y, widthText, height, TRUE) )
 236     {
 237         wxLogLastError("MoveWindow(buddy)");
 238     }
 239
 240     x += widthText + MARGIN_BETWEEN;
 241     if ( !::MoveWindow(GetHwnd(), x, y, widthBtn, height, TRUE) )
 242     {
 243         wxLogLastError("MoveWindow");
 244     }
 245 }
 246
 247 #endif // __WIN95__