src/motif/scrolbar.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/motif/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/scrolbar.h"
  16
  17 #ifdef __VMS__
  18 #pragma message disable nosimpint
  19 #define XtDisplay XTDISPLAY
  20 #endif
  21 #include <Xm/Xm.h>
  22 #include <Xm/ScrollBar.h>
  23 #ifdef __VMS__
  24 #pragma message enable nosimpint
  25 #endif
  26
  27 #include "wx/motif/private.h"
  28
  29 static void wxScrollBarCallback(Widget widget, XtPointer clientData,
  30                         XmScaleCallbackStruct *cbs);
  31
  32 IMPLEMENT_DYNAMIC_CLASS(wxScrollBar, wxControl)
  33
  34 // Scrollbar
  35 bool wxScrollBar::Create(wxWindow *parent, wxWindowID id,
  36            const wxPoint& pos,
  37            const wxSize& size, long style,
  38            const wxValidator& validator,
  39            const wxString& name)
  40 {
  41     if( !CreateControl( parent, id, pos, size, style, validator, name ) )
  42         return false;
  43     PreCreation();
  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     PostCreation();
  58     AttachWidget (parent, m_mainWidget, (WXWidget) NULL,
  59                   pos.x, pos.y, newSize.x, newSize.y);
  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     wxCHECK_RET( scrollBar, _T("invalid widget in scrollbar callback") );
 130
 131     wxOrientation orientation = (wxOrientation)wxPtrToUInt(clientData);
 132     wxEventType eventType = wxEVT_NULL;
 133
 134     switch (cbs->reason)
 135     {
 136         case XmCR_INCREMENT:
 137         {
 138             eventType = wxEVT_SCROLL_LINEDOWN;
 139             break;
 140         }
 141         case XmCR_DECREMENT:
 142         {
 143             eventType = wxEVT_SCROLL_LINEUP;
 144             break;
 145         }
 146         case XmCR_DRAG:
 147         {
 148             eventType = wxEVT_SCROLL_THUMBTRACK;
 149             break;
 150         }
 151         case XmCR_VALUE_CHANGED:
 152         {
 153             eventType = wxEVT_SCROLL_THUMBRELEASE;
 154             break;
 155         }
 156         case XmCR_PAGE_INCREMENT:
 157         {
 158             eventType = wxEVT_SCROLL_PAGEDOWN;
 159             break;
 160         }
 161         case XmCR_PAGE_DECREMENT:
 162         {
 163             eventType = wxEVT_SCROLL_PAGEUP;
 164             break;
 165         }
 166         case XmCR_TO_TOP:
 167         {
 168             eventType = wxEVT_SCROLL_TOP;
 169             break;
 170         }
 171         case XmCR_TO_BOTTOM:
 172         {
 173             eventType = wxEVT_SCROLL_BOTTOM;
 174             break;
 175         }
 176         default:
 177         {
 178             // Should never get here
 179             wxFAIL_MSG("Unknown scroll event.");
 180             break;
 181         }
 182     }
 183
 184     wxScrollEvent event(eventType, scrollBar->GetId(),
 185                         cbs->value, orientation);
 186     event.SetEventObject(scrollBar);
 187     scrollBar->GetEventHandler()->ProcessEvent(event);
 188 }