dash/FilterRatingsWidget.cpp

// -*- Mode: C++; indent-tabs-mode: nil; tab-width: 2 -*-
/*
 * Copyright 2011 Canonical Ltd.
 *
 * This program is free software: you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License version 3, as
 * published by the  Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranties of
 * MERCHANTABILITY, SATISFACTORY QUALITY or FITNESS FOR A PARTICULAR
 * PURPOSE.  See the applicable version of the GNU Lesser General Public
 * License for more details.
 *
 * You should have received a copy of both the GNU Lesser General Public
 * License version 3 along with this program.  If not, see
 * <http://www.gnu.org/licenses/>
 *
 * Authored by: Gordon Allott <gord.allott@canonical.com>
 *
 */

#include <Nux/Nux.h>
#include <glib.h>
#include "config.h"
#include <glib/gi18n-lib.h>

#include "unity-shared/DashStyle.h"
#include "unity-shared/GraphicsUtils.h"
#include "FilterGenreWidget.h"
#include "FilterGenreButton.h"
#include "FilterBasicButton.h"
#include "FilterRatingsButton.h"
#include "FilterRatingsWidget.h"

namespace unity
{
namespace dash
{
namespace
{
const RawPixel STAR_SIZE = 28_em;
}

NUX_IMPLEMENT_OBJECT_TYPE(FilterRatingsWidget);

FilterRatingsWidget::FilterRatingsWidget(NUX_FILE_LINE_DECL)
: FilterExpanderLabel(_("Rating"), NUX_FILE_LINE_PARAM)
, all_button_(nullptr)
{
  nux::VLayout* layout = new nux::VLayout(NUX_TRACKER_LOCATION);
  ratings_ = new FilterRatingsButton(NUX_TRACKER_LOCATION);

  layout->AddView(ratings_);

  UpdateSize();
  SetContents(layout);

  scale.changed.connect([this] (double scale) {
    if (all_button_) all_button_->scale = scale;
    UpdateSize();
  });
}

void FilterRatingsWidget::UpdateSize()
{
  dash::Style& style = dash::Style::Instance();
  int top_padding = style.GetSpaceBetweenFilterWidgets().CP(scale) - style.GetFilterHighlightPadding().CP(scale) - (1_em).CP(scale); // -1 (PNGs have an 1px top padding)
  int bottom_padding = style.GetFilterHighlightPadding().CP(scale);
  static_cast<nux::VLayout*>(GetLayout())->SetTopAndBottomPadding(top_padding, bottom_padding);

  ratings_->scale = scale();
  ratings_->SetMinimumHeight(STAR_SIZE.CP(scale));
  ratings_->ApplyMinHeight();
}

void FilterRatingsWidget::SetFilter(Filter::Ptr const& filter)
{
  filter_ = std::static_pointer_cast<RatingsFilter>(filter);

  // all button
  auto show_button_func = [this] (bool show_all_button)
  {
    all_button_ = show_all_button ? new FilterAllButton(NUX_TRACKER_LOCATION) : nullptr;
    SetRightHandView(all_button_);
    if (all_button_)
    {
      all_button_->scale = scale();
      all_button_->SetFilter(filter_);
    }
  };
  show_button_func(filter_->show_all_button);
  filter_->show_all_button.changed.connect(show_button_func);

  all_button_->SetFilter(filter_);
  expanded = !filter_->collapsed();
  ratings_->SetFilter(filter_);

  SetLabel(filter_->name);
  NeedRedraw();
}

std::string FilterRatingsWidget::GetFilterType()
{
  return "FilterRatingsWidget";
}

void FilterRatingsWidget::ClearRedirectedRenderChildArea()
{
  if (ratings_->IsRedrawNeeded())
    graphics::ClearGeometry(ratings_->GetGeometry());
}

} // namespace dash
} // namespace unity