src/motif/button.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        button.cpp
   3 // Purpose:     wxButton
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     17/09/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  13 #pragma implementation "button.h"
  14 #endif
  15
  16 // For compilers that support precompilation, includes "wx.h".
  17 #include "wx/wxprec.h"
  18
  19 #ifdef __VMS
  20 #define XtDisplay XTDISPLAY
  21 #endif
  22
  23 #include "wx/defs.h"
  24
  25 #include "wx/button.h"
  26
  27 #ifdef __VMS__
  28 #pragma message disable nosimpint
  29 #endif
  30 #include <Xm/PushBG.h>
  31 #include <Xm/PushB.h>
  32 #ifdef __VMS__
  33 #pragma message enable nosimpint
  34 #endif
  35
  36 #include "wx/stockitem.h"
  37 #include "wx/motif/private.h"
  38 #include "wx/sysopt.h"
  39
  40 void wxButtonCallback (Widget w, XtPointer clientData, XtPointer ptr);
  41
  42 IMPLEMENT_DYNAMIC_CLASS(wxButton, wxControl)
  43
  44 #define MIN_WIDTH 78
  45 #define MIN_LARGE_HEIGHT 30
  46
  47 // Button
  48
  49 bool wxButton::Create(wxWindow *parent, wxWindowID id, const wxString& lbl,
  50                       const wxPoint& pos,
  51                       const wxSize& size, long style,
  52                       const wxValidator& validator,
  53                       const wxString& name)
  54 {
  55     wxString label(lbl);
  56     if (label.empty() && wxIsStockID(id))
  57         label = wxGetStockLabel(id);
  58
  59     if( !CreateControl( parent, id, pos, size, style, validator, name ) )
  60         return false;
  61
  62     wxString label1(wxStripMenuCodes(label));
  63     wxXmString text( label1 );
  64
  65     Widget parentWidget = (Widget) parent->GetClientWidget();
  66
  67     /*
  68     * Patch Note (important)
  69     * There is no major reason to put a defaultButtonThickness here.
  70     * Not requesting it give the ability to put wxButton with a spacing
  71     * as small as requested. However, if some button become a DefaultButton,
  72     * other buttons are no more aligned -- This is why we set
  73     * defaultButtonThickness of ALL buttons belonging to the same wxPanel,
  74     * in the ::SetDefaultButton method.
  75     */
  76     m_mainWidget = (WXWidget) XtVaCreateManagedWidget ("button",
  77         xmPushButtonWidgetClass,
  78         parentWidget,
  79         wxFont::GetFontTag(), m_font.GetFontType(XtDisplay(parentWidget)),
  80         XmNlabelString, text(),
  81         XmNrecomputeSize, False,
  82         // See comment for wxButton::SetDefault
  83         // XmNdefaultButtonShadowThickness, 1,
  84         NULL);
  85
  86     XtAddCallback ((Widget) m_mainWidget,
  87                    XmNactivateCallback, (XtCallbackProc) wxButtonCallback,
  88                    (XtPointer) this);
  89
  90     wxSize best = GetBestSize();
  91     if( size.x != -1 ) best.x = size.x;
  92     if( size.y != -1 ) best.y = size.y;
  93
  94     AttachWidget (parent, m_mainWidget, (WXWidget) NULL,
  95                   pos.x, pos.y, best.x, best.y);
  96
  97     ChangeBackgroundColour();
  98
  99     return true;
 100 }
 101
 102 void wxButton::SetDefaultShadowThicknessAndResize()
 103 {
 104     Widget buttonWidget = (Widget)GetMainWidget();
 105     bool managed = XtIsManaged( buttonWidget );
 106     if( managed )
 107         XtUnmanageChild( buttonWidget );
 108
 109     XtVaSetValues( buttonWidget,
 110                    XmNdefaultButtonShadowThickness, 1,
 111                    NULL );
 112
 113     if( managed )
 114         XtManageChild( buttonWidget );
 115
 116     // this can't currently be done, because user code that calls SetDefault
 117     // will break otherwise
 118 #if 0
 119     wxSize best = GetBestSize(), actual = GetSize();
 120     if( best.x < actual.x ) best.x = actual.x;
 121     if( best.y < actual.y ) best.y = actual.y;
 122
 123     if( best != actual )
 124         SetSize( best );
 125 #endif
 126 }
 127
 128
 129 void wxButton::SetDefault()
 130 {
 131     wxWindow *parent = GetParent();
 132     if ( parent )
 133         parent->SetDefaultItem(this);
 134
 135     // We initially do not set XmNdefaultShadowThickness, to have
 136     // small buttons.  Unfortunately, buttons are now mis-aligned. We
 137     // try to correct this now -- setting this ressource to 1 for each
 138     // button in the same row.  Because it's very hard to find
 139     // wxButton in the same row, correction is straighforward: we set
 140     // resource for all wxButton in this parent (but not sub panels)
 141
 142     for (wxWindowList::compatibility_iterator node = parent->GetChildren().GetFirst ();
 143          node; node = node->GetNext ())
 144     {
 145         wxWindow *win = node->GetData ();
 146         wxButton *item = wxDynamicCast(win, wxButton);
 147         if (item)
 148             item->SetDefaultShadowThicknessAndResize();
 149     }
 150
 151     XtVaSetValues ((Widget) parent->GetMainWidget(),
 152                    XmNdefaultButton, (Widget) GetMainWidget(),
 153                    NULL);
 154 }
 155
 156 static inline bool wxMotifLargeButtons()
 157 {
 158     return wxSystemOptions::HasOption("motif.largebuttons")
 159         && wxSystemOptions::GetOptionInt("motif.largebuttons") != 0;
 160 }
 161
 162 /* static */
 163 wxSize wxButton::GetDefaultSize()
 164 {
 165     // TODO: check font size as in wxMSW ?  MB
 166     // Note: this is the button size (text + margin + shadow + defaultBorder)
 167     return wxSize( MIN_WIDTH, MIN_LARGE_HEIGHT );
 168 }
 169
 170 wxSize wxButton::DoGetBestSize() const
 171 {
 172     if( wxMotifLargeButtons() )
 173         return OldGetBestSize();
 174
 175     wxSize best = wxControl::DoGetBestSize();
 176
 177     if( HasFlag( wxBU_EXACTFIT ) )
 178         return best;
 179     else if( best.x < MIN_WIDTH )
 180         best.x = MIN_WIDTH;
 181
 182     return best;
 183 }
 184
 185 wxSize wxButton::OldGetBestSize() const
 186 {
 187     Dimension xmargin, ymargin, highlight, shadow, defThickness;
 188
 189     XtVaGetValues( (Widget)m_mainWidget,
 190                    XmNmarginWidth, &xmargin,
 191                    XmNmarginHeight, &ymargin,
 192                    XmNhighlightThickness, &highlight,
 193                    XmNshadowThickness, &shadow,
 194                    XmNdefaultButtonShadowThickness, &defThickness,
 195                    NULL );
 196
 197     int x = 0;  int y = 0;
 198     GetTextExtent( GetLabel(), &x, &y );
 199
 200     int margin = highlight * 2 +
 201         ( defThickness ? ( ( shadow + defThickness ) * 4 ) : ( shadow * 2 ) );
 202     wxSize best( x + xmargin * 2 + margin,
 203                  y + ymargin * 2 + margin );
 204
 205     // all buttons have at least the standard size unless the user explicitly
 206     // wants them to be of smaller size and used wxBU_EXACTFIT style when
 207     // creating the button
 208     if( !HasFlag( wxBU_EXACTFIT ) )
 209     {
 210         wxSize def = GetDefaultSize();
 211         int margin =  highlight * 2 +
 212             ( defThickness ? ( shadow * 4 + defThickness * 4 ) : 0 );
 213         def.x += margin;
 214         def.y += margin;
 215
 216         if( def.x > best.x )
 217             best.x = def.x;
 218         if( def.y > best.y )
 219             best.y = def.y;
 220     }
 221
 222     return best;
 223 }
 224
 225 void wxButton::Command (wxCommandEvent & event)
 226 {
 227     ProcessCommand (event);
 228 }
 229
 230 void wxButtonCallback (Widget w, XtPointer clientData, XtPointer WXUNUSED(ptr))
 231 {
 232     if (!wxGetWindowFromTable(w))
 233         // Widget has been deleted!
 234         return;
 235
 236     wxButton *item = (wxButton *) clientData;
 237     wxCommandEvent event (wxEVT_COMMAND_BUTTON_CLICKED, item->GetId());
 238     event.SetEventObject(item);
 239     item->ProcessCommand (event);
 240 }