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 wxUSE_SPINCTRL
  37
  38 #if defined(__WIN95__)
  39
  40 #include "wx/spinctrl.h"
  41 #include "wx/msw/private.h"
  42
  43 #if (defined(__WIN95__) && !defined(__GNUWIN32__)) || defined(__TWIN32__) || defined(wxUSE_NORLANDER_HEADERS)
  44     #include <commctrl.h>
  45 #endif
  46
  47 #include <limits.h>         // for INT_MIN
  48
  49 // ----------------------------------------------------------------------------
  50 // macros
  51 // ----------------------------------------------------------------------------
  52
  53 IMPLEMENT_DYNAMIC_CLASS(wxSpinCtrl, wxControl)
  54
  55 BEGIN_EVENT_TABLE(wxSpinCtrl, wxSpinButton)
  56     EVT_SPIN(-1, wxSpinCtrl::OnSpinChange)
  57 END_EVENT_TABLE()
  58
  59 // ----------------------------------------------------------------------------
  60 // constants
  61 // ----------------------------------------------------------------------------
  62
  63 // the margin between the up-down control and its buddy (can be arbitrary,
  64 // choose what you like - or may be decide during run-time depending on the
  65 // font size?)
  66 static const int MARGIN_BETWEEN = 1;
  67
  68 // ============================================================================
  69 // implementation
  70 // ============================================================================
  71
  72 // ----------------------------------------------------------------------------
  73 // construction
  74 // ----------------------------------------------------------------------------
  75
  76 bool wxSpinCtrl::Create(wxWindow *parent,
  77                         wxWindowID id,
  78                         const wxString& value,
  79                         const wxPoint& pos,
  80                         const wxSize& size,
  81                         long style,
  82                         int min, int max, int initial,
  83                         const wxString& name)
  84 {
  85     // before using DoGetBestSize(), have to set style to let the base class
  86     // know whether this is a horizontal or vertical control (we're always
  87     // vertical)
  88     style |= wxSP_VERTICAL;
  89     SetWindowStyle(style);
  90
  91     // calculate the sizes: the size given is the toal size for both controls
  92     // and we need to fit them both in the given width (height is the same)
  93     wxSize sizeText(size), sizeBtn(size);
  94     sizeBtn.x = wxSpinButton::DoGetBestSize().x;
  95     if ( sizeText.x <= 0 )
  96     {
  97         // DEFAULT_ITEM_WIDTH is the default width for the text control
  98         sizeText.x = DEFAULT_ITEM_WIDTH + MARGIN_BETWEEN + sizeBtn.x;
  99     }
 100
 101     sizeText.x -= sizeBtn.x + MARGIN_BETWEEN;
 102     if ( sizeText.x <= 0 )
 103     {
 104         wxLogDebug(_T("not enough space for wxSpinCtrl!"));
 105     }
 106
 107     wxPoint posBtn(pos);
 108     posBtn.x += sizeText.x + MARGIN_BETWEEN;
 109
 110     // create the spin button
 111     if ( !wxSpinButton::Create(parent, id, posBtn, sizeBtn, style, name) )
 112     {
 113         return FALSE;
 114     }
 115
 116     SetRange(min, max);
 117     SetValue(initial);
 118
 119     // create the text window
 120     m_hwndBuddy = (WXHWND)::CreateWindowEx
 121                     (
 122                      WS_EX_CLIENTEDGE,       // sunken border
 123                      _T("EDIT"),             // window class
 124                      NULL,                   // no window title
 125                      WS_CHILD | WS_BORDER,   // style (will be shown later)
 126                      pos.x, pos.y,           // position
 127                      0, 0,                   // size (will be set later)
 128                      GetHwndOf(parent),      // parent
 129                      (HMENU)-1,              // control id
 130                      wxGetInstance(),        // app instance
 131                      NULL                    // unused client data
 132                     );
 133
 134     if ( !m_hwndBuddy )
 135     {
 136         wxLogLastError("CreateWindow(buddy text window)");
 137
 138         return FALSE;
 139     }
 140
 141     // should have the same font as the other controls
 142     SetFont(GetParent()->GetFont());
 143
 144     // set the size of the text window - can do it only now, because we
 145     // couldn't call DoGetBestSize() before as font wasn't set
 146     if ( sizeText.y <= 0 )
 147     {
 148         int cx, cy;
 149         wxGetCharSize(GetHWND(), &cx, &cy, &GetFont());
 150
 151         sizeText.y = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);
 152     }
 153
 154     DoMoveWindow(pos.x, pos.y,
 155                  sizeText.x + sizeBtn.x + MARGIN_BETWEEN, sizeText.y);
 156
 157     (void)::ShowWindow((HWND)m_hwndBuddy, SW_SHOW);
 158
 159     // associate the text window with the spin button
 160     (void)::SendMessage(GetHwnd(), UDM_SETBUDDY, (WPARAM)m_hwndBuddy, 0);
 161
 162     if ( !value.IsEmpty() )
 163     {
 164         SetValue(value);
 165     }
 166
 167     return TRUE;
 168 }
 169
 170 // ----------------------------------------------------------------------------
 171 // wxTextCtrl-like methods
 172 // ----------------------------------------------------------------------------
 173
 174 void wxSpinCtrl::SetValue(const wxString& text)
 175 {
 176     if ( !::SetWindowText((HWND)m_hwndBuddy, text.c_str()) )
 177     {
 178         wxLogLastError("SetWindowText(buddy)");
 179     }
 180 }
 181
 182 int wxSpinCtrl::GetValue() const
 183 {
 184     wxString val = wxGetWindowText(m_hwndBuddy);
 185
 186     long n;
 187     if ( (wxSscanf(val, wxT("%lu"), &n) != 1) )
 188         n = INT_MIN;
 189
 190     return n;
 191 }
 192
 193 // ----------------------------------------------------------------------------
 194 // forward some methods to subcontrols
 195 // ----------------------------------------------------------------------------
 196
 197 bool wxSpinCtrl::SetFont(const wxFont& font)
 198 {
 199     if ( !wxWindowBase::SetFont(font) )
 200     {
 201         // nothing to do
 202         return FALSE;
 203     }
 204
 205     WXHANDLE hFont = GetFont().GetResourceHandle();
 206     (void)::SendMessage((HWND)m_hwndBuddy, WM_SETFONT, (WPARAM)hFont, TRUE);
 207
 208     return TRUE;
 209 }
 210
 211 bool wxSpinCtrl::Show(bool show)
 212 {
 213     if ( !wxControl::Show(show) )
 214     {
 215         return FALSE;
 216     }
 217
 218     ::ShowWindow((HWND)m_hwndBuddy, show ? SW_SHOW : SW_HIDE);
 219
 220     return TRUE;
 221 }
 222
 223 bool wxSpinCtrl::Enable(bool enable)
 224 {
 225     if ( !wxControl::Enable(enable) )
 226     {
 227         return FALSE;
 228     }
 229
 230     ::EnableWindow((HWND)m_hwndBuddy, enable);
 231
 232     return TRUE;
 233 }
 234
 235 // ----------------------------------------------------------------------------
 236 // event processing
 237 // ----------------------------------------------------------------------------
 238
 239 void wxSpinCtrl::OnSpinChange(wxSpinEvent& eventSpin)
 240 {
 241     wxCommandEvent event(wxEVT_COMMAND_SPINCTRL_UPDATED, GetId());
 242     event.SetEventObject(this);
 243     event.SetInt(eventSpin.GetPosition());
 244
 245     (void)GetEventHandler()->ProcessEvent(event);
 246
 247     if ( eventSpin.GetSkipped() )
 248     {
 249         event.Skip();
 250     }
 251 }
 252
 253 // ----------------------------------------------------------------------------
 254 // size calculations
 255 // ----------------------------------------------------------------------------
 256
 257 wxSize wxSpinCtrl::DoGetBestSize() const
 258 {
 259     wxSize sizeBtn = wxSpinButton::DoGetBestSize();
 260     sizeBtn.x += DEFAULT_ITEM_WIDTH + MARGIN_BETWEEN;
 261
 262     int y;
 263     wxGetCharSize(GetHWND(), NULL, &y, &GetFont());
 264     y = EDIT_HEIGHT_FROM_CHAR_HEIGHT(y);
 265
 266     if ( sizeBtn.y < y )
 267     {
 268         // make the text tall enough
 269         sizeBtn.y = y;
 270     }
 271
 272     return sizeBtn;
 273 }
 274
 275 void wxSpinCtrl::DoMoveWindow(int x, int y, int width, int height)
 276 {
 277     int widthBtn = wxSpinButton::DoGetBestSize().x;
 278     int widthText = width - widthBtn - MARGIN_BETWEEN;
 279     if ( widthText <= 0 )
 280     {
 281         wxLogDebug(_T("not enough space for wxSpinCtrl!"));
 282     }
 283
 284     if ( !::MoveWindow((HWND)m_hwndBuddy, x, y, widthText, height, TRUE) )
 285     {
 286         wxLogLastError("MoveWindow(buddy)");
 287     }
 288
 289     x += widthText + MARGIN_BETWEEN;
 290     if ( !::MoveWindow(GetHwnd(), x, y, widthBtn, height, TRUE) )
 291     {
 292         wxLogLastError("MoveWindow");
 293     }
 294 }
 295
 296 #endif // __WIN95__
 297
 298 #endif
 299        // wxUSE_SPINCTRL
 300