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