+/////////////////////////////////////////////////////////////////////////////
+// Name: cocoa/scrolbar.mm
+// Purpose: wxScrollBar
+// Author: David Elliott
+// Modified by:
+// Created: 2004/04/25
+// RCS-ID: $Id$
+// Copyright: (c) 2004 David Elliott
+// Licence: wxWindows licence
+/////////////////////////////////////////////////////////////////////////////
+
+#include "wx/wxprec.h"
+#if wxUSE_SCROLLBAR
+
+#ifndef WX_PRECOMP
+ #include "wx/app.h"
+ #include "wx/scrolbar.h"
+#endif //WX_PRECOMP
+
+#import <AppKit/NSScroller.h>
+
+IMPLEMENT_DYNAMIC_CLASS(wxScrollBar, wxControl)
+BEGIN_EVENT_TABLE(wxScrollBar, wxScrollBarBase)
+END_EVENT_TABLE()
+WX_IMPLEMENT_COCOA_OWNER(wxScrollBar,NSScroller,NSControl,NSView)
+
+bool wxScrollBar::Create(wxWindow *parent, wxWindowID winid,
+ const wxPoint& pos, const wxSize& size, long style,
+ const wxValidator& validator, const wxString& name)
+{
+ if(!CreateControl(parent,winid,pos,size,style,validator,name))
+ return false;
+ SetNSScroller([[NSScroller alloc] initWithFrame: MakeDefaultNSRect(size)]);
+ [m_cocoaNSView release];
+ if(m_parent)
+ m_parent->CocoaAddChild(this);
+ SetInitialFrameRect(pos,size);
+
+ return true;
+}
+
+wxScrollBar::~wxScrollBar()
+{
+ DisassociateNSScroller(GetNSScroller());
+}
+
+/* A word about NSScroller vs. wxScrollbar:
+
+NSScroller uses two float values to represent the state of the scroller.
+The floatValue indicates where the knob is positioned on a scale from
+0.0 to 1.0. A value of 0.0 indicates the scroller is at the top or left,
+a value of 1.0 indicates the scroller is at the bottom or right. A value
+of 0.5 indicates the scroller is dead center.
+
+wxScrollBar uses three values. The position indicates the number of
+scroll units where 0 is at the top or left. The range indicates how
+many scroll units there are in the entire bar and the thumb size indicates
+how many scroll units the thumb takes. The scrollbar is at the bottom
+or right when position == range - thumbSize.
+
+It may be easier to consider wx position to be the top or left of the thumb.
+In Cocoa, floatValue can be considered as if it were the center of the
+thumb and the range is ALWAYS (no matter what the knobProportion is) the
+distance between the center point of the knob from one extreme to the other.
+*/
+
+int wxScrollBar::GetThumbPosition() const
+{
+ return (int)((m_range-m_thumbSize)*[GetNSScroller() floatValue]);
+}
+
+void wxScrollBar::SetThumbPosition(int position)
+{
+ [GetNSScroller() setFloatValue:((float)position)/(m_range-m_thumbSize)];
+}
+
+void wxScrollBar::SetScrollbar(int position, int thumbSize,
+ int range, int pageSize, bool refresh)
+{
+ m_range = range;
+ m_thumbSize = thumbSize;
+ m_pageSize = pageSize;
+ [GetNSScroller() setFloatValue:((float)position)/(m_range-m_thumbSize)
+ knobProportion:((float)m_thumbSize)/m_range];
+}
+
+void wxScrollBar::Cocoa_wxNSScrollerAction()
+{
+ NSScrollerPart hitPart = [GetNSScroller() hitPart];
+ wxEventType command;
+ // Note: the comments about the part that is hit are for OS X, the
+ // constants are sort of a leftover from NeXT. It makes more sense if
+ // you remember that in NeXT clicking the knob slot used to do what
+ // option-clicking does now.
+ switch(hitPart)
+ {
+ // User dragged knob
+ case NSScrollerKnob:
+ command = wxEVT_SCROLL_THUMBTRACK;
+ break;
+ // User option-clicked slot
+ case NSScrollerKnobSlot:
+ command = wxEVT_SCROLL_THUMBTRACK;
+ break;
+ // User clicked Up/Left button
+ case NSScrollerDecrementLine:
+ command = wxEVT_SCROLL_LINEUP;
+ break;
+ // User option-clicked Up/left or clicked in slot
+ case NSScrollerDecrementPage:
+ command = wxEVT_SCROLL_PAGEUP;
+ break;
+ // User clicked Down/Right button
+ case NSScrollerIncrementLine:
+ command = wxEVT_SCROLL_LINEDOWN;
+ break;
+ // User option-clicked Down/Right or clicked in slot
+ case NSScrollerIncrementPage:
+ command = wxEVT_SCROLL_PAGEDOWN;
+ break;
+ // No-op
+ case NSScrollerNoPart:
+ default:
+ return;
+ }
+ // TODO: When scrolling by pages, readjust the floatValue using the
+ // pageSize (which may be different from thumbSize).
+ wxScrollEvent event(command, GetId(), GetThumbPosition(),
+ HasFlag(wxSB_VERTICAL)?wxVERTICAL:wxHORIZONTAL);
+ event.SetEventObject(this);
+ GetEventHandler()->ProcessEvent(event);
+}
+
+#endif // wxUSE_SCROLLBAR
projects / wxWidgets.git / commitdiff
