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/*
Copyright (C) 2013 Carl Hetherington <cth@carlh.net>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef DCPOMATIC_MULTIPLE_WIDGET_H
#define DCPOMATIC_MULTIPLE_WIDGET_H
#include <vector>
#include <wx/wx.h>
#include <wx/gbsizer.h>
#include <boost/function.hpp>
#include "wx_util.h"
/** A widget which represents some Content state and which can be used
* when multiple pieces of content are selected.
*
* @param S Type containing the content being represented (e.g. VideoContent)
* @param T Type of the widget (e.g. wxSpinCtrl)
*/
template <class S, class T>
class ContentWidget
{
public:
/** @param parent Parent window.
* @param wrapped Control widget that we are wrapping.
* @param property ContentProperty that the widget is handling.
* @param getter Function on the Content to get the value.
* @param setter Function on the Content to set the value.
*/
ContentWidget (wxWindow* parent, T* wrapped, int property, boost::function<int (S*)> getter, boost::function<void (S*, int)> setter)
: _wrapped (wrapped)
, _sizer (0)
, _button (new wxButton (parent, wxID_ANY, _("Multiple values")))
, _property (property)
, _getter (getter)
, _setter (setter)
, _ignore_model_changes (false)
{
_button->SetToolTip (_("Click the button to set all selected content to the same value."));
_button->Hide ();
_button->Bind (wxEVT_COMMAND_BUTTON_CLICKED, boost::bind (&ContentWidget::button_clicked, this));
_wrapped->Bind (wxEVT_COMMAND_SPINCTRL_UPDATED, boost::bind (&ContentWidget::view_changed, this));
}
T* wrapped () const {
return _wrapped;
}
typedef std::vector<boost::shared_ptr<S> > List;
void set_content (List content)
{
for (typename std::list<boost::signals2::connection>::iterator i = _connections.begin(); i != _connections.end(); ++i) {
i->disconnect ();
}
_content = content;
_wrapped->Enable (!_content.empty ());
update_from_model ();
for (typename List::iterator i = _content.begin(); i != _content.end(); ++i) {
_connections.push_back ((*i)->Changed.connect (boost::bind (&ContentWidget::model_changed, this, _2)));
}
}
void add (wxGridBagSizer* sizer, wxGBPosition position)
{
_sizer = sizer;
_position = position;
_sizer->Add (_wrapped, _position);
}
void update_from_model ()
{
if (_content.empty ()) {
set_single ();
return;
}
typename List::iterator i = _content.begin ();
int const v = boost::bind (_getter, _content.front().get())();
while (i != _content.end() && boost::bind (_getter, i->get())() == v) {
++i;
}
if (i == _content.end ()) {
set_single ();
checked_set (_wrapped, v);
} else {
set_multiple ();
}
}
private:
void set_single ()
{
if (_wrapped->IsShown ()) {
return;
}
_sizer->Detach (_button);
_button->Hide ();
_sizer->Add (_wrapped, _position);
_wrapped->Show ();
_sizer->Layout ();
}
void set_multiple ()
{
if (_button->IsShown ()) {
return;
}
_wrapped->Hide ();
_sizer->Detach (_wrapped);
_button->Show ();
_sizer->Add (_button, _position);
_sizer->Layout ();
}
void button_clicked ()
{
int const v = boost::bind (_getter, _content.front().get())();
for (typename List::iterator i = _content.begin (); i != _content.end(); ++i) {
boost::bind (_setter, i->get(), v) ();
}
}
void view_changed ()
{
for (size_t i = 0; i < _content.size(); ++i) {
/* Only update our view on the last time round this loop */
_ignore_model_changes = i < (_content.size() - 1);
boost::bind (_setter, _content[i].get(), _wrapped->GetValue ()) ();
}
}
void model_changed (int property)
{
if (property == _property && !_ignore_model_changes) {
update_from_model ();
}
}
T* _wrapped;
wxGridBagSizer* _sizer;
wxGBPosition _position;
wxButton* _button;
List _content;
int _property;
boost::function<int (S*)> _getter;
boost::function<void (S*, int)> _setter;
std::list<boost::signals2::connection> _connections;
bool _ignore_model_changes;
};
#endif
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