src/msw/button.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        button.cpp
   3 // Purpose:     wxButton
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart and Markus Holzem
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19 #ifdef __GNUG__
  20     #pragma implementation "button.h"
  21 #endif
  22
  23 // For compilers that support precompilation, includes "wx.h".
  24 #include "wx/wxprec.h"
  25
  26 #ifdef __BORLANDC__
  27     #pragma hdrstop
  28 #endif
  29
  30 #ifndef WX_PRECOMP
  31     #include "wx/button.h"
  32     #include "wx/brush.h"
  33 #endif
  34
  35 #include "wx/msw/private.h"
  36
  37 // ----------------------------------------------------------------------------
  38 // macros
  39 // ----------------------------------------------------------------------------
  40
  41 #if !USE_SHARED_LIBRARY
  42     IMPLEMENT_DYNAMIC_CLASS(wxButton, wxControl)
  43 #endif
  44
  45 // this macro tries to adjust the default button height to a reasonable value
  46 // using the char height as the base
  47 #define BUTTON_HEIGHT_FROM_CHAR_HEIGHT(cy) (11*EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy)/10)
  48
  49 // ============================================================================
  50 // implementation
  51 // ============================================================================
  52
  53 // ----------------------------------------------------------------------------
  54 // creation/destruction
  55 // ----------------------------------------------------------------------------
  56
  57 bool wxButton::Create(wxWindow *parent,
  58                       wxWindowID id,
  59                       const wxString& label,
  60                       const wxPoint& pos,
  61                       const wxSize& size,
  62                       long style,
  63                       const wxValidator& validator,
  64                       const wxString& name)
  65 {
  66     if ( !CreateBase(parent, id, pos, size, style, name) )
  67         return FALSE;
  68
  69     SetValidator(validator);
  70
  71     parent->AddChild((wxButton *)this);
  72
  73     m_backgroundColour = parent->GetBackgroundColour() ;
  74     m_foregroundColour = parent->GetForegroundColour() ;
  75
  76     m_hWnd = (WXHWND)CreateWindowEx
  77                      (
  78                       MakeExtendedStyle(m_windowStyle),
  79                       _T("BUTTON"),
  80                       label,
  81                       WS_VISIBLE | WS_TABSTOP | WS_CHILD,
  82                       0, 0, 0, 0,
  83                       GetWinHwnd(parent),
  84                       (HMENU)m_windowId,
  85                       wxGetInstance(),
  86                       NULL
  87                      );
  88
  89     // Subclass again for purposes of dialog editing mode
  90     SubclassWin(m_hWnd);
  91
  92     SetFont(parent->GetFont());
  93
  94     SetSize(pos.x, pos.y, size.x, size.y);
  95
  96     return TRUE;
  97 }
  98
  99 wxButton::~wxButton()
 100 {
 101     wxPanel *panel = wxDynamicCast(GetParent(), wxPanel);
 102     if ( panel )
 103     {
 104         if ( panel->GetDefaultItem() == this )
 105         {
 106             // don't leave the panel with invalid default item
 107             panel->SetDefaultItem(NULL);
 108         }
 109     }
 110 }
 111
 112 // ----------------------------------------------------------------------------
 113 // size management including autosizing
 114 // ----------------------------------------------------------------------------
 115
 116 void wxButton::DoSetSize(int x, int y, int width, int height, int sizeFlags)
 117 {
 118     int currentX, currentY;
 119     GetPosition(&currentX, &currentY);
 120     int x1 = x;
 121     int y1 = y;
 122     if (x == -1 || (sizeFlags & wxSIZE_ALLOW_MINUS_ONE))
 123         x1 = currentX;
 124     if (y == -1 || (sizeFlags & wxSIZE_ALLOW_MINUS_ONE))
 125         y1 = currentY;
 126
 127     AdjustForParentClientOrigin(x1, y1, sizeFlags);
 128
 129     int actualWidth = width;
 130     int actualHeight = height;
 131     int ww, hh;
 132     GetSize(&ww, &hh);
 133
 134     int current_width;
 135     int cyf;
 136     wxString buf = wxGetWindowText(GetHWND());
 137     GetTextExtent(buf, &current_width, &cyf, NULL, NULL, &GetFont());
 138
 139     // If we're prepared to use the existing width, then...
 140     if (width == -1 && ((sizeFlags & wxSIZE_AUTO_WIDTH) != wxSIZE_AUTO_WIDTH))
 141     {
 142         actualWidth = ww;
 143     }
 144     else if (width == -1)
 145     {
 146         int cx;
 147         int cy;
 148         wxGetCharSize(GetHWND(), &cx, &cy, & this->GetFont());
 149         actualWidth = (int)(current_width + 3*cx) ;
 150     }
 151
 152     // If we're prepared to use the existing height, then...
 153     if (height == -1 && ((sizeFlags & wxSIZE_AUTO_HEIGHT) != wxSIZE_AUTO_HEIGHT))
 154     {
 155         actualHeight = hh;
 156     }
 157     else if (height == -1)
 158     {
 159         actualHeight = BUTTON_HEIGHT_FROM_CHAR_HEIGHT(cyf);
 160     }
 161
 162     MoveWindow(GetHwnd(), x1, y1, actualWidth, actualHeight, TRUE);
 163 }
 164
 165 void wxButton::SetDefault()
 166 {
 167     wxWindow *parent = GetParent();
 168     wxPanel *panel = wxDynamicCast(parent, wxPanel);
 169     if ( panel )
 170         panel->SetDefaultItem(this);
 171
 172     if ( parent )
 173     {
 174         SendMessage(GetWinHwnd(parent), DM_SETDEFID, m_windowId, 0L);
 175     }
 176
 177     SendMessage(GetHwnd(), BM_SETSTYLE, BS_DEFPUSHBUTTON, 1L);
 178 }
 179
 180 // ----------------------------------------------------------------------------
 181 // helpers
 182 // ----------------------------------------------------------------------------
 183
 184 bool wxButton::SendClickEvent()
 185 {
 186     wxCommandEvent event(wxEVT_COMMAND_BUTTON_CLICKED, GetId());
 187     event.SetEventObject(this);
 188
 189     return ProcessCommand(event);
 190 }
 191
 192 void wxButton::Command(wxCommandEvent & event)
 193 {
 194     ProcessCommand(event);
 195 }
 196
 197 // ----------------------------------------------------------------------------
 198 // event/message handlers
 199 // ----------------------------------------------------------------------------
 200
 201 bool wxButton::MSWCommand(WXUINT param, WXWORD id)
 202 {
 203     bool processed = FALSE;
 204     if ( param == BN_CLICKED || param == 1 ) // 1 for accelerator
 205     {
 206         processed = SendClickEvent();
 207     }
 208
 209     return processed;
 210 }
 211
 212 WXHBRUSH wxButton::OnCtlColor(WXHDC pDC,
 213                               WXHWND pWnd,
 214                               WXUINT nCtlColor,
 215                               WXUINT message,
 216                               WXWPARAM wParam,
 217                               WXLPARAM lParam)
 218 {
 219   wxBrush *backgroundBrush = wxTheBrushList->FindOrCreateBrush(GetBackgroundColour(), wxSOLID);
 220
 221   return (WXHBRUSH) backgroundBrush->GetResourceHandle();
 222 }
 223