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 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  13 #pragma implementation "scrolbar.h"
  14 #endif
  15
  16 // For compilers that support precompilation, includes "wx.h".
  17 #include "wx/wxprec.h"
  18
  19 #include "wx/defs.h"
  20 #include "wx/scrolbar.h"
  21
  22 #ifdef __VMS__
  23 #pragma message disable nosimpint
  24 #define XtDisplay XTDISPLAY
  25 #endif
  26 #include <Xm/Xm.h>
  27 #include <Xm/ScrollBar.h>
  28 #ifdef __VMS__
  29 #pragma message enable nosimpint
  30 #endif
  31
  32 #include "wx/motif/private.h"
  33
  34 static void wxScrollBarCallback(Widget widget, XtPointer clientData,
  35                         XmScaleCallbackStruct *cbs);
  36
  37 IMPLEMENT_DYNAMIC_CLASS(wxScrollBar, wxControl)
  38
  39 // Scrollbar
  40 bool wxScrollBar::Create(wxWindow *parent, wxWindowID id,
  41            const wxPoint& pos,
  42            const wxSize& size, long style,
  43            const wxValidator& validator,
  44            const wxString& name)
  45 {
  46     if( !CreateControl( parent, id, pos, size, style, validator, name ) )
  47         return false;
  48
  49     wxSize newSize =
  50         ( style & wxHORIZONTAL ) ? wxSize( 140, 16 ) : wxSize( 16, 140 );
  51     if( size.x != -1 ) newSize.x = size.x;
  52     if( size.y != -1 ) newSize.y = size.y;
  53
  54     Widget parentWidget = (Widget) parent->GetClientWidget();
  55
  56     m_mainWidget =
  57         DoCreateScrollBar( (WXWidget)parentWidget,
  58                            (wxOrientation)(style & (wxHORIZONTAL|wxVERTICAL)),
  59                            (void (*)())wxScrollBarCallback );
  60
  61     AttachWidget (parent, m_mainWidget, (WXWidget) NULL,
  62                   pos.x, pos.y, newSize.x, newSize.y);
  63     ChangeBackgroundColour();
  64
  65     return true;
  66 }
  67
  68 wxScrollBar::~wxScrollBar()
  69 {
  70 }
  71
  72 void wxScrollBar::SetThumbPosition(int pos)
  73 {
  74     XtVaSetValues ((Widget) m_mainWidget,
  75                    XmNvalue, pos,
  76                    NULL);
  77 }
  78
  79 int wxScrollBar::GetThumbPosition() const
  80 {
  81     int pos;
  82     XtVaGetValues((Widget) m_mainWidget,
  83                   XmNvalue, &pos, NULL);
  84     return pos;
  85 }
  86
  87 void wxScrollBar::SetScrollbar(int position, int thumbSize, int range, int pageSize,
  88     bool WXUNUSED(refresh))
  89 {
  90     m_viewSize = pageSize;
  91     m_pageSize = thumbSize;
  92     m_objectSize = range;
  93
  94     if (range == 0)
  95       range = 1;
  96     if (thumbSize == 0)
  97       thumbSize = 1;
  98
  99     XtVaSetValues((Widget) m_mainWidget,
 100          XmNvalue, position,
 101          XmNminimum, 0,
 102          XmNmaximum, range,
 103          XmNsliderSize, thumbSize,
 104          XmNpageIncrement, pageSize,
 105          NULL);
 106 }
 107
 108 void wxScrollBar::Command(wxCommandEvent& event)
 109 {
 110     SetThumbPosition(event.m_commandInt);
 111     ProcessCommand(event);
 112 }
 113
 114 void wxScrollBar::ChangeFont(bool WXUNUSED(keepOriginalSize))
 115 {
 116     // TODO
 117     // Do anything for a scrollbar? A font will never be seen.
 118 }
 119
 120 void wxScrollBar::ChangeBackgroundColour()
 121 {
 122     wxWindow::ChangeBackgroundColour();
 123
 124     XtVaSetValues ((Widget) GetMainWidget(),
 125         XmNtroughColor, m_backgroundColour.AllocColour(XtDisplay((Widget) GetMainWidget())),
 126         NULL);
 127 }
 128
 129 static void wxScrollBarCallback(Widget widget, XtPointer clientData,
 130                                 XmScaleCallbackStruct *cbs)
 131 {
 132     wxScrollBar *scrollBar = (wxScrollBar*)wxGetWindowFromTable(widget);
 133     wxOrientation orientation = (wxOrientation)(int)clientData;
 134     wxEventType eventType = wxEVT_NULL;
 135
 136     switch (cbs->reason)
 137     {
 138         case XmCR_INCREMENT:
 139         {
 140             eventType = wxEVT_SCROLL_LINEDOWN;
 141             break;
 142         }
 143         case XmCR_DECREMENT:
 144         {
 145             eventType = wxEVT_SCROLL_LINEUP;
 146             break;
 147         }
 148         case XmCR_DRAG:
 149         {
 150             eventType = wxEVT_SCROLL_THUMBTRACK;
 151             break;
 152         }
 153         case XmCR_VALUE_CHANGED:
 154         {
 155             eventType = wxEVT_SCROLL_THUMBRELEASE;
 156             break;
 157         }
 158         case XmCR_PAGE_INCREMENT:
 159         {
 160             eventType = wxEVT_SCROLL_PAGEDOWN;
 161             break;
 162         }
 163         case XmCR_PAGE_DECREMENT:
 164         {
 165             eventType = wxEVT_SCROLL_PAGEUP;
 166             break;
 167         }
 168         case XmCR_TO_TOP:
 169         {
 170             eventType = wxEVT_SCROLL_TOP;
 171             break;
 172         }
 173         case XmCR_TO_BOTTOM:
 174         {
 175             eventType = wxEVT_SCROLL_BOTTOM;
 176             break;
 177         }
 178         default:
 179         {
 180             // Should never get here
 181             wxFAIL_MSG("Unknown scroll event.");
 182             break;
 183         }
 184     }
 185
 186     wxScrollEvent event(eventType, scrollBar->GetId(),
 187                         cbs->value, orientation);
 188     event.SetEventObject(scrollBar);
 189     scrollBar->GetEventHandler()->ProcessEvent(event);
 190 }