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235 lines (183 loc) · 5.48 KB
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/**********************************************************************
Audacity: A Digital Audio Editor
WindowAccessible.cpp
David Bailes
*******************************************************************//**
\class WindowAccessible
\brief An alternative to using wxWindowAccessible, which in wxWidgets 3.1.1
contained GetParent() which was incorrect.
*//*******************************************************************/
#include "WindowAccessible.h"
#include <wx/setup.h> // for wxUSE_* macros
#include <wx/window.h>
#if wxUSE_ACCESSIBILITY
WindowAccessible::WindowAccessible(wxWindow* win)
: wxAccessible(win)
{
if (win) win->SetAccessible(this);
}
wxAccStatus WindowAccessible::GetName(int childId, wxString* name)
{
wxCHECK( GetWindow() != nullptr, wxACC_FAIL);
// If the control has children, don't override their names
if (childId > 0)
return wxACC_NOT_IMPLEMENTED;
*name = GetWindow()->GetName();
return wxACC_OK;
}
#include <wx/slider.h>
SliderAx::SliderAx(wxWindow * window, const TranslatableString &fmt) :
WindowAccessible( window )
{
mParent = window;
mFmt = fmt;
}
SliderAx::~SliderAx()
{
}
// Retrieves the address of an IDispatch interface for the specified child.
// All objects must support this property.
wxAccStatus SliderAx::GetChild( int childId, wxAccessible** child )
{
if( childId == wxACC_SELF )
{
*child = this;
}
else
{
*child = NULL;
}
return wxACC_OK;
}
// Gets the number of children.
wxAccStatus SliderAx::GetChildCount(int* childCount)
{
*childCount = 3;
return wxACC_OK;
}
// Gets the default action for this object (0) or > 0 (the action for a child).
// Return wxACC_OK even if there is no action. actionName is the action, or the empty
// string if there is no action.
// The retrieved string describes the action that is performed on an object,
// not what the object does as a result. For example, a toolbar button that prints
// a document has a default action of "Press" rather than "Prints the current document."
wxAccStatus SliderAx::GetDefaultAction( int WXUNUSED(childId), wxString *actionName )
{
actionName->clear();
return wxACC_OK;
}
// Returns the description for this object or a child.
wxAccStatus SliderAx::GetDescription( int WXUNUSED(childId), wxString *description )
{
description->clear();
return wxACC_OK;
}
// Gets the window with the keyboard focus.
// If childId is 0 and child is NULL, no object in
// this subhierarchy has the focus.
// If this object has the focus, child should be 'this'.
wxAccStatus SliderAx::GetFocus(int* childId, wxAccessible** child)
{
*childId = 0;
*child = this;
return wxACC_OK;
}
// Returns help text for this object or a child, similar to tooltip text.
wxAccStatus SliderAx::GetHelpText( int WXUNUSED(childId), wxString *helpText )
{
helpText->clear();
return wxACC_OK;
}
// Returns the keyboard shortcut for this object or child.
// Return e.g. ALT+K
wxAccStatus SliderAx::GetKeyboardShortcut( int WXUNUSED(childId), wxString *shortcut )
{
shortcut->clear();
return wxACC_OK;
}
// Returns the rectangle for this object (id = 0) or a child element (id > 0).
// rect is in screen coordinates.
wxAccStatus SliderAx::GetLocation( wxRect& rect, int WXUNUSED(elementId) )
{
wxSlider *s = wxDynamicCast( GetWindow(), wxSlider );
rect = s->GetRect();
rect.SetPosition( s->GetParent()->ClientToScreen( rect.GetPosition() ) );
return wxACC_OK;
}
// Gets the name of the specified object.
wxAccStatus SliderAx::GetName(int WXUNUSED(childId), wxString* name)
{
wxSlider *s = wxDynamicCast( GetWindow(), wxSlider );
*name = s->GetName();
return wxACC_OK;
}
// Returns a role constant.
wxAccStatus SliderAx::GetRole(int childId, wxAccRole* role)
{
switch( childId )
{
case 0:
*role = wxROLE_SYSTEM_SLIDER;
break;
case 1:
case 3:
*role = wxROLE_SYSTEM_PUSHBUTTON;
break;
case 2:
*role = wxROLE_SYSTEM_INDICATOR;
break;
}
return wxACC_OK;
}
// Gets a variant representing the selected children
// of this object.
// Acceptable values:
// - a null variant (IsNull() returns TRUE)
// - a list variant (GetType() == wxT("list"))
// - an integer representing the selected child element,
// or 0 if this object is selected (GetType() == wxT("long"))
// - a "void*" pointer to a wxAccessible child object
wxAccStatus SliderAx::GetSelections( wxVariant * WXUNUSED(selections) )
{
return wxACC_NOT_IMPLEMENTED;
}
// Returns a state constant.
wxAccStatus SliderAx::GetState(int childId, long* state)
{
wxSlider *s = wxDynamicCast( GetWindow(), wxSlider );
switch( childId )
{
case 0:
*state = wxACC_STATE_SYSTEM_FOCUSABLE;
break;
case 1:
if( s->GetValue() == s->GetMin() )
{
*state = wxACC_STATE_SYSTEM_INVISIBLE;
}
break;
case 3:
if( s->GetValue() == s->GetMax() )
{
*state = wxACC_STATE_SYSTEM_INVISIBLE;
}
break;
}
// Do not use mSliderIsFocused is not set until after this method
// is called.
*state |= ( s == wxWindow::FindFocus() ? wxACC_STATE_SYSTEM_FOCUSED : 0 );
return wxACC_OK;
}
// Returns a localized string representing the value for the object
// or child.
wxAccStatus SliderAx::GetValue(int childId, wxString* strValue)
{
wxSlider *s = wxDynamicCast( GetWindow(), wxSlider );
if( childId == 0 )
{
strValue->Printf( mFmt.Translation(), s->GetValue() );
return wxACC_OK;
}
return wxACC_NOT_SUPPORTED;
}
#endif // wxUSE_ACCESSIBILITY