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