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 #ifdef __GNUG__
  13 #pragma implementation "scrolbar.h"
  14 #endif
  15
  16 #include "wx/scrolbar.h"
  17
  18 #include <X11/IntrinsicP.h>
  19 #include <Xm/Xm.h>
  20 #include <Xm/RowColumn.h>
  21 #include <Xm/ScrollBar.h>
  22
  23 #include "wx/motif/private.h"
  24
  25 static void wxScrollBarCallback(Widget widget, XtPointer clientData,
  26                         XmScaleCallbackStruct *cbs);
  27
  28 #if !USE_SHARED_LIBRARY
  29 IMPLEMENT_DYNAMIC_CLASS(wxScrollBar, wxControl)
  30 #endif
  31
  32 // Scrollbar
  33 bool wxScrollBar::Create(wxWindow *parent, wxWindowID id,
  34            const wxPoint& pos,
  35            const wxSize& size, long style,
  36            const wxValidator& validator,
  37            const wxString& name)
  38 {
  39     if (!parent)
  40         return FALSE;
  41     parent->AddChild(this);
  42     SetName(name);
  43     m_backgroundColour = parent->GetBackgroundColour();
  44     m_foregroundColour = parent->GetForegroundColour();
  45     SetValidator(validator);
  46
  47     m_windowStyle = style;
  48
  49     if ( id == -1 )
  50         m_windowId = (int)NewControlId();
  51     else
  52         m_windowId = id;
  53
  54     int x = pos.x;
  55     int y = pos.y;
  56     int width = size.x;
  57     int height = size.y;
  58
  59     if (width == -1)
  60     {
  61       if (style & wxHORIZONTAL)
  62         width = 140;
  63       else
  64         width = 12;
  65     }
  66     if (height == -1)
  67     {
  68       if (style & wxVERTICAL)
  69         height = 140;
  70       else
  71         height = 12;
  72     }
  73
  74     Widget parentWidget = (Widget) parent->GetClientWidget();
  75     int direction = (style & wxHORIZONTAL) ? XmHORIZONTAL: XmVERTICAL;
  76
  77     Widget scrollBarWidget = XtVaCreateManagedWidget("scrollBarWidget",
  78                   xmScrollBarWidgetClass,  parentWidget,
  79                   XmNorientation,      direction,
  80                   NULL);
  81
  82     m_mainWidget = (Widget) scrollBarWidget;
  83
  84     // This will duplicate other events
  85     //    XtAddCallback(scrollBarWidget, XmNvalueChangedCallback, (XtCallbackProc)wxScrollBarCallback, (XtPointer)this);
  86     XtAddCallback(scrollBarWidget, XmNdragCallback, (XtCallbackProc)wxScrollBarCallback, (XtPointer)this);
  87     XtAddCallback(scrollBarWidget, XmNdecrementCallback, (XtCallbackProc)wxScrollBarCallback, (XtPointer)this);
  88     XtAddCallback(scrollBarWidget, XmNincrementCallback, (XtCallbackProc)wxScrollBarCallback, (XtPointer)this);
  89     XtAddCallback(scrollBarWidget, XmNpageDecrementCallback, (XtCallbackProc)wxScrollBarCallback, (XtPointer)this);
  90     XtAddCallback(scrollBarWidget, XmNpageIncrementCallback, (XtCallbackProc)wxScrollBarCallback, (XtPointer)this);
  91     XtAddCallback(scrollBarWidget, XmNtoTopCallback, (XtCallbackProc)wxScrollBarCallback, (XtPointer)this);
  92     XtAddCallback(scrollBarWidget, XmNtoBottomCallback, (XtCallbackProc)wxScrollBarCallback, (XtPointer)this);
  93
  94     SetCanAddEventHandler(TRUE);
  95     AttachWidget (parent, m_mainWidget, (WXWidget) NULL, x, y, width, height);
  96     ChangeBackgroundColour();
  97
  98     return TRUE;
  99 }
 100
 101 wxScrollBar::~wxScrollBar()
 102 {
 103 }
 104
 105 void wxScrollBar::SetThumbPosition(int pos)
 106 {
 107         if (m_mainWidget)
 108         {
 109                 XtVaSetValues ((Widget) m_mainWidget,
 110                                 XmNvalue, pos,
 111                                 NULL);
 112         }
 113 }
 114
 115 int wxScrollBar::GetThumbPosition() const
 116 {
 117         if (m_mainWidget)
 118         {
 119         int pos;
 120         XtVaGetValues((Widget) m_mainWidget,
 121             XmNvalue, &pos, NULL);
 122         return pos;
 123     }
 124     else
 125         return 0;
 126 }
 127
 128 void wxScrollBar::SetScrollbar(int position, int thumbSize, int range, int pageSize,
 129     bool WXUNUSED(refresh))
 130 {
 131     m_viewSize = pageSize;
 132     m_pageSize = thumbSize;
 133     m_objectSize = range;
 134
 135     if (range == 0)
 136       range = 1;
 137     if (thumbSize == 0)
 138       thumbSize = 1;
 139
 140     XtVaSetValues((Widget) m_mainWidget,
 141          XmNvalue, position,
 142          XmNminimum, 0,
 143          XmNmaximum, range,
 144          XmNsliderSize, thumbSize,
 145          XmNpageIncrement, pageSize,
 146          NULL);
 147 }
 148
 149 void wxScrollBar::Command(wxCommandEvent& event)
 150 {
 151     SetThumbPosition(event.m_commandInt);
 152     ProcessCommand(event);
 153 }
 154
 155 void wxScrollBar::ChangeFont(bool WXUNUSED(keepOriginalSize))
 156 {
 157     // TODO
 158     // Do anything for a scrollbar? A font will never be seen.
 159 }
 160
 161 void wxScrollBar::ChangeBackgroundColour()
 162 {
 163     wxWindow::ChangeBackgroundColour();
 164
 165     XtVaSetValues ((Widget) GetMainWidget(),
 166         XmNtroughColor, m_backgroundColour.AllocColour(XtDisplay((Widget) GetMainWidget())),
 167         NULL);
 168 }
 169
 170 void wxScrollBar::ChangeForegroundColour()
 171 {
 172     wxWindow::ChangeForegroundColour();
 173 }
 174
 175 static void wxScrollBarCallback(Widget WXUNUSED(widget), XtPointer clientData,
 176                         XmScaleCallbackStruct *cbs)
 177 {
 178     wxScrollBar *scrollBar = (wxScrollBar *)clientData;
 179
 180     wxEventType eventType = wxEVT_NULL;
 181     switch (cbs->reason)
 182     {
 183         case XmCR_INCREMENT:
 184         {
 185             eventType = wxEVT_SCROLL_LINEDOWN;
 186             break;
 187         }
 188         case XmCR_DECREMENT:
 189         {
 190             eventType = wxEVT_SCROLL_LINEUP;
 191             break;
 192         }
 193         case XmCR_DRAG:
 194         {
 195             eventType = wxEVT_SCROLL_THUMBTRACK;
 196             break;
 197         }
 198         case XmCR_VALUE_CHANGED:
 199         {
 200             // TODO: Should this be intercepted too, or will it cause
 201             // duplicate events?
 202             eventType = wxEVT_SCROLL_THUMBTRACK;
 203             break;
 204         }
 205         case XmCR_PAGE_INCREMENT:
 206         {
 207             eventType = wxEVT_SCROLL_PAGEDOWN;
 208             break;
 209         }
 210         case XmCR_PAGE_DECREMENT:
 211         {
 212             eventType = wxEVT_SCROLL_PAGEUP;
 213             break;
 214         }
 215         case XmCR_TO_TOP:
 216         {
 217             eventType = wxEVT_SCROLL_TOP;
 218             break;
 219         }
 220         case XmCR_TO_BOTTOM:
 221         {
 222             eventType = wxEVT_SCROLL_BOTTOM;
 223             break;
 224         }
 225         default:
 226         {
 227             // Should never get here
 228             wxFAIL_MSG("Unknown scroll event.");
 229             break;
 230         }
 231     }
 232
 233     wxScrollEvent event(eventType, scrollBar->GetId());
 234     event.SetEventObject(scrollBar);
 235     event.SetPosition(cbs->value);
 236     scrollBar->GetEventHandler()->ProcessEvent(event);
 237 /*
 238     if (!scrollBar->inSetValue)
 239       scrollBar->ProcessCommand(event);
 240 */
 241 }
 242