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 wxSize wxButton::DoGetBestSize()
 117 {
 118     wxString label = wxGetWindowText(GetHWND());
 119     int wBtn;
 120     GetTextExtent(label, &wBtn, NULL);
 121
 122     int wChar, hChar;
 123     wxGetCharSize(GetHWND(), &wChar, &hChar, &GetFont());
 124
 125     // add a margin - the button is wider than just its label
 126     wBtn += 3*wChar;
 127
 128     // the button height is proportional to the height of the font used
 129     int hBtn = BUTTON_HEIGHT_FROM_CHAR_HEIGHT(hChar);
 130
 131     return wxSize(wBtn, hBtn);
 132 }
 133
 134 /* static */
 135 wxSize wxButton::GetDefaultSize()
 136 {
 137     // the base unit is the height of the system GUI font
 138     int wChar, hChar;
 139     wxGetCharSize(0, &wChar, &hChar, NULL);
 140
 141     // the button height is proportional to the height of the font used
 142     int hBtn = BUTTON_HEIGHT_FROM_CHAR_HEIGHT(hChar);
 143
 144     // and the width/height ration is 75/23
 145     return wxSize((75 * hBtn) / 23, hBtn);
 146 }
 147
 148 // ----------------------------------------------------------------------------
 149 // set this button as the default one in its panel
 150 // ----------------------------------------------------------------------------
 151
 152 void wxButton::SetDefault()
 153 {
 154     wxWindow *parent = GetParent();
 155     wxPanel *panel = wxDynamicCast(parent, wxPanel);
 156     if ( panel )
 157         panel->SetDefaultItem(this);
 158
 159     if ( parent )
 160     {
 161         SendMessage(GetWinHwnd(parent), DM_SETDEFID, m_windowId, 0L);
 162     }
 163
 164     SendMessage(GetHwnd(), BM_SETSTYLE, BS_DEFPUSHBUTTON, 1L);
 165 }
 166
 167 // ----------------------------------------------------------------------------
 168 // helpers
 169 // ----------------------------------------------------------------------------
 170
 171 bool wxButton::SendClickEvent()
 172 {
 173     wxCommandEvent event(wxEVT_COMMAND_BUTTON_CLICKED, GetId());
 174     event.SetEventObject(this);
 175
 176     return ProcessCommand(event);
 177 }
 178
 179 void wxButton::Command(wxCommandEvent & event)
 180 {
 181     ProcessCommand(event);
 182 }
 183
 184 // ----------------------------------------------------------------------------
 185 // event/message handlers
 186 // ----------------------------------------------------------------------------
 187
 188 bool wxButton::MSWCommand(WXUINT param, WXWORD id)
 189 {
 190     bool processed = FALSE;
 191     switch ( param )
 192     {
 193         case 1:                                             // 1 for accelerator
 194         case BN_CLICKED:
 195             processed = SendClickEvent();
 196             break;
 197     }
 198
 199     return processed;
 200 }
 201
 202 WXHBRUSH wxButton::OnCtlColor(WXHDC pDC,
 203                               WXHWND pWnd,
 204                               WXUINT nCtlColor,
 205                               WXUINT message,
 206                               WXWPARAM wParam,
 207                               WXLPARAM lParam)
 208 {
 209   wxBrush *backgroundBrush = wxTheBrushList->FindOrCreateBrush(GetBackgroundColour(), wxSOLID);
 210
 211   return (WXHBRUSH) backgroundBrush->GetResourceHandle();
 212 }
 213