timeline-zoom-scale.cpp

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/*
  TimelineZoomScale  -  widget to control timeline zoom scale

  Copyright (C)         Lumiera.org
    2011,               Michael R. Fisher <mfisher31@gmail.com>

  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.

* *****************************************************/


//#include "stage/widget/timeline-widget.hpp"  /////////////////////////////////////////////////////////////TODO old GTK-2 UI is defunct (3/23)
#include "stage/widget/timeline/timeline-zoom-scale.hpp"

using namespace Gtk;         

namespace stage {
namespace widget {

class TimelineWidget;

namespace timeline {
  
  TimelineZoomScale::TimelineZoomScale()
    : HBox()
    , adjustment(Gtk::Adjustment::create(0.5, 0.0, 1.0, 0.000001))
    , slider()
    , zoomIn(Stock::ZOOM_IN)
    , zoomOut(Stock::ZOOM_OUT)
    , button_step_size(0.03)
    {
      /* Setup the Slider Control */
      slider.set_adjustment (adjustment);
      slider.set_size_request (123,10);
      slider.set_digits (6);
      
      /* Inverted because smaller values "zoom in" */
      slider.set_inverted (true);
      
      slider.set_draw_value (false);
      
      /* Make our connections */
      zoomIn.signal_clicked().
          connect (sigc::mem_fun(this, &TimelineZoomScale::on_zoom_in_clicked));
      zoomOut.signal_clicked().
          connect (sigc::mem_fun(this, &TimelineZoomScale::on_zoom_out_clicked));
      adjustment->signal_value_changed().
          connect (sigc::mem_fun(this, &TimelineZoomScale::on_zoom));
      
      /* Add Our Widgets and show them */
      pack_start (zoomOut,PACK_SHRINK);
      pack_start (slider,PACK_SHRINK);
      pack_start (zoomIn,PACK_SHRINK);
      
      show_all();
    }
  
  
  void
  TimelineZoomScale::wireTimelineState (shared_ptr<TimelineState> currentState
//                                      TimelineWidget::TimelineStateChangeSignal stateChangeSignal          ////////////TODO defunct
                                       )
  {
    on_timeline_state_changed (currentState);
//  stateChangeSignal.connect (
//      sigc::mem_fun(this, &TimelineZoomScale::on_timeline_state_changed));
  }
  
  
  void
  TimelineZoomScale::on_timeline_state_changed (shared_ptr<TimelineState> newState)
  {
    REQUIRE (newState);
    timelineState = newState;
    
//  adjustment->set_value (getViewWindow().get_smoothed_time_scale());
  }
  
  
  void
  TimelineZoomScale::on_zoom_in_clicked()
  {
    double newValue = adjustment->get_value() - button_step_size;
    adjustment->set_value(newValue);
  }
  
  
  void
  TimelineZoomScale::on_zoom_out_clicked()
  {
    double newValue = adjustment->get_value() + button_step_size;
    adjustment->set_value(newValue);
  }
  
  
  void
  TimelineZoomScale::on_zoom()
  {
    zoomSignal.emit (adjustment->get_value());
  }
  
  
  sigc::signal<void, double>
  TimelineZoomScale::signal_zoom()
  {
    return zoomSignal;
  }
  
  
  TimelineViewWindow&
  TimelineZoomScale::getViewWindow()
  {
    REQUIRE (timelineState, "lifecycle error");
    return timelineState->getViewWindow();
  }
  
  
}}}// namespace stage::widget::timeline