src/motif/scrolbar.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        scrolbar.cpp
   3 // Purpose:     wxScrollBar
   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 #include "wx/defs.h"
  16 #include "wx/scrolbar.h"
  17
  18 #ifdef __VMS__
  19 #pragma message disable nosimpint
  20 #define XtDisplay XTDISPLAY
  21 #endif
  22 #include <Xm/Xm.h>
  23 #include <Xm/ScrollBar.h>
  24 #ifdef __VMS__
  25 #pragma message enable nosimpint
  26 #endif
  27
  28 #include "wx/motif/private.h"
  29
  30 static void wxScrollBarCallback(Widget widget, XtPointer clientData,
  31                         XmScaleCallbackStruct *cbs);
  32
  33 IMPLEMENT_DYNAMIC_CLASS(wxScrollBar, wxControl)
  34
  35 // Scrollbar
  36 bool wxScrollBar::Create(wxWindow *parent, wxWindowID id,
  37            const wxPoint& pos,
  38            const wxSize& size, long style,
  39            const wxValidator& validator,
  40            const wxString& name)
  41 {
  42     if( !CreateControl( parent, id, pos, size, style, validator, name ) )
  43         return false;
  44
  45     wxSize newSize =
  46         ( style & wxHORIZONTAL ) ? wxSize( 140, 16 ) : wxSize( 16, 140 );
  47     if( size.x != -1 ) newSize.x = size.x;
  48     if( size.y != -1 ) newSize.y = size.y;
  49
  50     Widget parentWidget = (Widget) parent->GetClientWidget();
  51
  52     m_mainWidget =
  53         DoCreateScrollBar( (WXWidget)parentWidget,
  54                            (wxOrientation)(style & (wxHORIZONTAL|wxVERTICAL)),
  55                            (void (*)())wxScrollBarCallback );
  56
  57     AttachWidget (parent, m_mainWidget, (WXWidget) NULL,
  58                   pos.x, pos.y, newSize.x, newSize.y);
  59     ChangeBackgroundColour();
  60
  61     return true;
  62 }
  63
  64 wxScrollBar::~wxScrollBar()
  65 {
  66 }
  67
  68 void wxScrollBar::SetThumbPosition(int pos)
  69 {
  70     XtVaSetValues ((Widget) m_mainWidget,
  71                    XmNvalue, pos,
  72                    NULL);
  73 }
  74
  75 int wxScrollBar::GetThumbPosition() const
  76 {
  77     int pos;
  78     XtVaGetValues((Widget) m_mainWidget,
  79                   XmNvalue, &pos, NULL);
  80     return pos;
  81 }
  82
  83 void wxScrollBar::SetScrollbar(int position, int thumbSize, int range, int pageSize,
  84     bool WXUNUSED(refresh))
  85 {
  86     m_viewSize = pageSize;
  87     m_pageSize = thumbSize;
  88     m_objectSize = range;
  89
  90     if (range == 0)
  91       range = 1;
  92     if (thumbSize == 0)
  93       thumbSize = 1;
  94
  95     XtVaSetValues((Widget) m_mainWidget,
  96          XmNvalue, position,
  97          XmNminimum, 0,
  98          XmNmaximum, range,
  99          XmNsliderSize, thumbSize,
 100          XmNpageIncrement, pageSize,
 101          NULL);
 102 }
 103
 104 void wxScrollBar::Command(wxCommandEvent& event)
 105 {
 106     SetThumbPosition(event.GetInt());
 107     ProcessCommand(event);
 108 }
 109
 110 void wxScrollBar::ChangeFont(bool WXUNUSED(keepOriginalSize))
 111 {
 112     // TODO
 113     // Do anything for a scrollbar? A font will never be seen.
 114 }
 115
 116 void wxScrollBar::ChangeBackgroundColour()
 117 {
 118     wxWindow::ChangeBackgroundColour();
 119
 120     XtVaSetValues ((Widget) GetMainWidget(),
 121         XmNtroughColor, m_backgroundColour.AllocColour(XtDisplay((Widget) GetMainWidget())),
 122         NULL);
 123 }
 124
 125 static void wxScrollBarCallback(Widget widget, XtPointer clientData,
 126                                 XmScaleCallbackStruct *cbs)
 127 {
 128     wxScrollBar *scrollBar = (wxScrollBar*)wxGetWindowFromTable(widget);
 129     wxOrientation orientation = (wxOrientation)wxPtrToUInt(clientData);
 130     wxEventType eventType = wxEVT_NULL;
 131
 132     switch (cbs->reason)
 133     {
 134         case XmCR_INCREMENT:
 135         {
 136             eventType = wxEVT_SCROLL_LINEDOWN;
 137             break;
 138         }
 139         case XmCR_DECREMENT:
 140         {
 141             eventType = wxEVT_SCROLL_LINEUP;
 142             break;
 143         }
 144         case XmCR_DRAG:
 145         {
 146             eventType = wxEVT_SCROLL_THUMBTRACK;
 147             break;
 148         }
 149         case XmCR_VALUE_CHANGED:
 150         {
 151             eventType = wxEVT_SCROLL_THUMBRELEASE;
 152             break;
 153         }
 154         case XmCR_PAGE_INCREMENT:
 155         {
 156             eventType = wxEVT_SCROLL_PAGEDOWN;
 157             break;
 158         }
 159         case XmCR_PAGE_DECREMENT:
 160         {
 161             eventType = wxEVT_SCROLL_PAGEUP;
 162             break;
 163         }
 164         case XmCR_TO_TOP:
 165         {
 166             eventType = wxEVT_SCROLL_TOP;
 167             break;
 168         }
 169         case XmCR_TO_BOTTOM:
 170         {
 171             eventType = wxEVT_SCROLL_BOTTOM;
 172             break;
 173         }
 174         default:
 175         {
 176             // Should never get here
 177             wxFAIL_MSG("Unknown scroll event.");
 178             break;
 179         }
 180     }
 181
 182     wxScrollEvent event(eventType, scrollBar->GetId(),
 183                         cbs->value, orientation);
 184     event.SetEventObject(scrollBar);
 185     scrollBar->GetEventHandler()->ProcessEvent(event);
 186 }