src/motif/button.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/motif/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 // For compilers that support precompilation, includes "wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #ifdef __VMS
  16 #define XtDisplay XTDISPLAY
  17 #endif
  18
  19 #include "wx/button.h"
  20
  21 #ifdef __VMS__
  22 #pragma message disable nosimpint
  23 #endif
  24 #include <Xm/PushBG.h>
  25 #include <Xm/PushB.h>
  26 #ifdef __VMS__
  27 #pragma message enable nosimpint
  28 #endif
  29
  30
  31 #ifndef WX_PRECOMP
  32     #include "wx/toplevel.h"
  33 #endif
  34
  35 #include "wx/stockitem.h"
  36 #include "wx/motif/private.h"
  37 #include "wx/sysopt.h"
  38
  39 void wxButtonCallback (Widget w, XtPointer clientData, XtPointer ptr);
  40
  41 IMPLEMENT_DYNAMIC_CLASS(wxButton, wxControl)
  42
  43 #define MIN_WIDTH 78
  44 #define MIN_LARGE_HEIGHT 30
  45
  46 // Button
  47
  48 bool wxButton::Create(wxWindow *parent, wxWindowID id, const wxString& lbl,
  49                       const wxPoint& pos,
  50                       const wxSize& size, long style,
  51                       const wxValidator& validator,
  52                       const wxString& name)
  53 {
  54     wxString label(lbl);
  55     if (label.empty() && wxIsStockID(id))
  56         label = wxGetStockLabel(id);
  57
  58     if( !CreateControl( parent, id, pos, size, style, validator, name ) )
  59         return false;
  60
  61     wxXmString text( GetLabelText(label) );
  62
  63     Widget parentWidget = (Widget) parent->GetClientWidget();
  64
  65     /*
  66     * Patch Note (important)
  67     * There is no major reason to put a defaultButtonThickness here.
  68     * Not requesting it give the ability to put wxButton with a spacing
  69     * as small as requested. However, if some button become a DefaultButton,
  70     * other buttons are no more aligned -- This is why we set
  71     * defaultButtonThickness of ALL buttons belonging to the same wxPanel,
  72     * in the ::SetDefaultButton method.
  73     */
  74     m_mainWidget = (WXWidget) XtVaCreateManagedWidget ("button",
  75         xmPushButtonWidgetClass,
  76         parentWidget,
  77         wxFont::GetFontTag(), m_font.GetFontTypeC(XtDisplay(parentWidget)),
  78         XmNlabelString, text(),
  79         XmNrecomputeSize, False,
  80         // See comment for wxButton::SetDefault
  81         // XmNdefaultButtonShadowThickness, 1,
  82         NULL);
  83
  84     XtAddCallback ((Widget) m_mainWidget,
  85                    XmNactivateCallback, (XtCallbackProc) wxButtonCallback,
  86                    (XtPointer) this);
  87
  88     wxSize best = GetBestSize();
  89     if( size.x != -1 ) best.x = size.x;
  90     if( size.y != -1 ) best.y = size.y;
  91
  92     AttachWidget (parent, m_mainWidget, (WXWidget) NULL,
  93                   pos.x, pos.y, best.x, best.y);
  94
  95     ChangeBackgroundColour();
  96
  97     return true;
  98 }
  99
 100 void wxButton::SetDefaultShadowThicknessAndResize()
 101 {
 102     Widget buttonWidget = (Widget)GetMainWidget();
 103     bool managed = XtIsManaged( buttonWidget );
 104     if( managed )
 105         XtUnmanageChild( buttonWidget );
 106
 107     XtVaSetValues( buttonWidget,
 108                    XmNdefaultButtonShadowThickness, 1,
 109                    NULL );
 110
 111     if( managed )
 112         XtManageChild( buttonWidget );
 113
 114     // this can't currently be done, because user code that calls SetDefault
 115     // will break otherwise
 116 #if 0
 117     wxSize best = GetBestSize(), actual = GetSize();
 118     if( best.x < actual.x ) best.x = actual.x;
 119     if( best.y < actual.y ) best.y = actual.y;
 120
 121     if( best != actual )
 122         SetSize( best );
 123 #endif
 124     InvalidateBestSize();
 125 }
 126
 127
 128 void wxButton::SetDefault()
 129 {
 130     wxTopLevelWindow *tlw = wxDynamicCast(wxGetTopLevelParent(this), wxTopLevelWindow);
 131     if ( tlw )
 132         tlw->SetDefaultItem(this);
 133
 134     // We initially do not set XmNdefaultShadowThickness, to have
 135     // small buttons.  Unfortunately, buttons are now mis-aligned. We
 136     // try to correct this now -- setting this ressource to 1 for each
 137     // button in the same row.  Because it's very hard to find
 138     // wxButton in the same row, correction is straighforward: we set
 139     // resource for all wxButton in this parent (but not sub panels)
 140
 141     wxWindow *parent = GetParent();
 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::GetMinSize() const
 186 {
 187     if( wxMotifLargeButtons() )
 188         return OldGetMinSize();
 189
 190     return DoGetBestSize();
 191 }
 192
 193 wxSize wxButton::OldGetMinSize() const
 194 {
 195     return OldGetBestSize();
 196 }
 197
 198 wxSize wxButton::OldGetBestSize() const
 199 {
 200     Dimension xmargin, ymargin, highlight, shadow, defThickness;
 201
 202     XtVaGetValues( (Widget)m_mainWidget,
 203                    XmNmarginWidth, &xmargin,
 204                    XmNmarginHeight, &ymargin,
 205                    XmNhighlightThickness, &highlight,
 206                    XmNshadowThickness, &shadow,
 207                    XmNdefaultButtonShadowThickness, &defThickness,
 208                    NULL );
 209
 210     int x = 0;  int y = 0;
 211     GetTextExtent( GetLabel(), &x, &y );
 212
 213     int margin = highlight * 2 +
 214         ( defThickness ? ( ( shadow + defThickness ) * 4 ) : ( shadow * 2 ) );
 215
 216     wxSize best( x + xmargin * 2 + margin,
 217                  y + ymargin * 2 + margin );
 218
 219     // all buttons have at least the standard size unless the user explicitly
 220     // wants them to be of smaller size and used wxBU_EXACTFIT style when
 221     // creating the button
 222     if( !HasFlag( wxBU_EXACTFIT ) )
 223     {
 224         wxSize def = GetDefaultSize();
 225         int margin =  highlight * 2 +
 226             ( defThickness ? ( shadow * 4 + defThickness * 4 ) : 0 );
 227         def.x += margin;
 228         def.y += margin;
 229
 230         if( def.x > best.x )
 231             best.x = def.x;
 232         if( def.y > best.y )
 233             best.y = def.y;
 234     }
 235
 236     return best;
 237 }
 238
 239 void wxButton::Command (wxCommandEvent & event)
 240 {
 241     ProcessCommand (event);
 242 }
 243
 244 void wxButtonCallback (Widget w, XtPointer clientData, XtPointer WXUNUSED(ptr))
 245 {
 246     if (!wxGetWindowFromTable(w))
 247         // Widget has been deleted!
 248         return;
 249
 250     wxButton *item = (wxButton *) clientData;
 251     wxCommandEvent event (wxEVT_COMMAND_BUTTON_CLICKED, item->GetId());
 252     event.SetEventObject(item);
 253     item->ProcessCommand (event);
 254 }