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/*
* 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 <math.h>
#include <Nux/Nux.h>
#include <NuxCore/Logger.h>
#include <UnityCore/Variant.h>
#include "RatingsButton.h"
#include "DashStyle.h"
namespace
{
const int num_stars = 5;
}
namespace unity
{
RatingsButton::RatingsButton(int star_size, int star_gap, NUX_FILE_LINE_DECL)
: nux::ToggleButton(NUX_FILE_LINE_PARAM)
, editable_(true)
, rating_(0.0)
, focused_star_(-1)
, star_size_(star_size)
, star_gap_(star_gap)
{
SetAcceptKeyNavFocusOnMouseDown(false);
SetAcceptKeyNavFocusOnMouseEnter(true);
mouse_up.connect(sigc::mem_fun(this, &RatingsButton::RecvMouseUp));
mouse_move.connect(sigc::mem_fun(this, &RatingsButton::RecvMouseMove));
mouse_drag.connect(sigc::mem_fun(this, &RatingsButton::RecvMouseDrag));
key_nav_focus_change.connect([&](nux::Area* area, bool has_focus, nux::KeyNavDirection direction)
{
if (has_focus && direction != nux::KEY_NAV_NONE)
focused_star_ = 0;
else if (!has_focus)
focused_star_ = -1;
QueueDraw();
});
key_nav_focus_activate.connect([&](nux::Area*) { SetRating(static_cast<float>(focused_star_+1)/num_stars); });
key_down.connect(sigc::mem_fun(this, &RatingsButton::OnKeyDown));
}
RatingsButton::~RatingsButton()
{
}
void RatingsButton::SetEditable(bool editable)
{
editable_ = editable;
if (!editable_)
focused_star_ = -1;
QueueDraw();
}
void RatingsButton::SetRating(float rating)
{
rating_ = rating;
QueueDraw();
}
float RatingsButton::GetRating() const
{
return rating_;
}
void RatingsButton::Draw(nux::GraphicsEngine& GfxContext, bool force_draw)
{
int rating = static_cast<int>(rating_ * num_stars);
// FIXME: 9/26/2011
// We should probably support an API for saying whether the ratings
// should or shouldn't support half stars...but our only consumer at
// the moment is the applications lens which according to design
// (Bug #839759) shouldn't. So for now just force rounding.
// int total_half_stars = rating % 2;
// int total_full_stars = rating / 2;
int total_full_stars = rating;
nux::Geometry const& geo = GetGeometry();
nux::Geometry geo_star(geo);
geo_star.width = star_size_;
geo_star.height = star_size_;
gPainter.PaintBackground(GfxContext, geo);
// set up our texture mode
nux::TexCoordXForm texxform;
texxform.SetWrap(nux::TEXWRAP_CLAMP_TO_BORDER, nux::TEXWRAP_CLAMP_TO_BORDER);
texxform.SetTexCoordType(nux::TexCoordXForm::OFFSET_SCALE_COORD);
texxform.SetFilter(nux::TEXFILTER_LINEAR, nux::TEXFILTER_LINEAR);
// clear what is behind us
unsigned int alpha = 0, src = 0, dest = 0;
GfxContext.GetRenderStates().GetBlend(alpha, src, dest);
GfxContext.GetRenderStates().SetBlend(true, GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
nux::Color col = nux::color::Black;
col.alpha = 0;
GfxContext.QRP_Color(geo.x,
geo.y,
geo.width,
geo.height,
col);
for (int index = 0; index < num_stars; ++index)
{
dash::Style& style = dash::Style::Instance();
nux::BaseTexture* texture = style.GetStarSelectedIcon();
if (index < total_full_stars)
{
if (GetVisualState() == nux::ButtonVisualState::VISUAL_STATE_NORMAL)
texture = style.GetStarSelectedIcon();
else if (GetVisualState() == nux::ButtonVisualState::VISUAL_STATE_PRELIGHT)
texture = style.GetStarSelectedIcon();
else if (GetVisualState() == nux::ButtonVisualState::VISUAL_STATE_PRESSED)
texture = style.GetStarSelectedIcon();
}
else
{
if (GetVisualState() == nux::ButtonVisualState::VISUAL_STATE_NORMAL)
texture = style.GetStarDeselectedIcon();
else if (GetVisualState() == nux::ButtonVisualState::VISUAL_STATE_PRELIGHT)
texture = style.GetStarDeselectedIcon();
else if (GetVisualState() == nux::ButtonVisualState::VISUAL_STATE_PRESSED)
texture = style.GetStarDeselectedIcon();
}
GfxContext.QRP_1Tex(geo_star.x,
geo_star.y,
geo_star.width,
geo_star.height,
texture->GetDeviceTexture(),
texxform,
nux::Color(1.0f, 1.0f, 1.0f, 1.0f));
if (focused_star_ == index)
{
GfxContext.QRP_1Tex(geo_star.x,
geo_star.y,
geo_star.width,
geo_star.height,
style.GetStarHighlightIcon()->GetDeviceTexture(),
texxform,
nux::Color(1.0f, 1.0f, 1.0f, 0.5f));
}
geo_star.x += geo_star.width + star_gap_;
}
GfxContext.GetRenderStates().SetBlend(alpha, src, dest);
}
void RatingsButton::UpdateRatingToMouse(int x)
{
int width = num_stars*star_size_ + (num_stars-1)*star_gap_;
float new_rating = (static_cast<float>(x) / width);
// FIXME: change to * 2 once we decide to support also half-stars
new_rating = ceil((num_stars * 1) * new_rating) / (num_stars * 1);
new_rating = (new_rating > 1) ? 1 : ((new_rating < 0) ? 0 : new_rating);
SetRating(new_rating);
}
void RatingsButton::RecvMouseUp(int x, int y, unsigned long button_flags, unsigned long key_flags)
{
if (!editable_)
return;
UpdateRatingToMouse(x);
}
void RatingsButton::RecvMouseDrag(int x, int y, int dx, int dy,
unsigned long button_flags,
unsigned long key_flags)
{
if (!editable_)
return;
UpdateRatingToMouse(x);
}
void RatingsButton::RecvMouseMove(int x, int y, int dx, int dy,
unsigned long button_flags,
unsigned long key_flags)
{
if (!editable_)
return;
int width = num_stars*star_size_+ (num_stars-1)*star_gap_;
focused_star_ = std::max(0, std::min(static_cast<int>(ceil((static_cast<float>(x) / width) * num_stars) - 1), num_stars - 1));
if (!HasKeyFocus())
nux::GetWindowCompositor().SetKeyFocusArea(this);
QueueDraw();
}
bool RatingsButton::InspectKeyEvent(unsigned int eventType, unsigned int keysym, const char* character)
{
nux::KeyNavDirection direction = nux::KEY_NAV_NONE;
switch (keysym)
{
case NUX_VK_LEFT:
direction = nux::KeyNavDirection::KEY_NAV_LEFT;
break;
case NUX_VK_RIGHT:
direction = nux::KeyNavDirection::KEY_NAV_RIGHT;
break;
default:
direction = nux::KeyNavDirection::KEY_NAV_NONE;
break;
}
if (direction == nux::KeyNavDirection::KEY_NAV_NONE)
return false;
else if (direction == nux::KEY_NAV_LEFT && (focused_star_ <= 0))
return false;
else if (direction == nux::KEY_NAV_RIGHT && (focused_star_ >= num_stars - 1))
return false;
else
return true;
}
void RatingsButton::OnKeyDown(unsigned long event_type, unsigned long event_keysym,
unsigned long event_state, const TCHAR* character,
unsigned short key_repeat_count)
{
if (!editable_)
return;
switch (event_keysym)
{
case NUX_VK_LEFT:
--focused_star_;
break;
case NUX_VK_RIGHT:
++focused_star_;
break;
default:
return;
}
QueueDraw();
}
bool RatingsButton::AcceptKeyNavFocus()
{
return editable_;
}
std::string RatingsButton::GetName() const
{
return "RatingsButton";
}
void RatingsButton::AddProperties(GVariantBuilder* builder)
{
variant::BuilderWrapper(builder)
.add(GetAbsoluteGeometry())
.add("rating", rating_)
.add("focused-star", focused_star_)
.add("editable", editable_);
}
} // namespace unity
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