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// -*- Mode: C++; indent-tabs-mode: nil; tab-width: 2 -*-
/*
* Copyright (C) 2011-2014 Canonical Ltd
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU 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 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, see <http://www.gnu.org/licenses/>.
*
* Authored by: Mirco Müller <mirco.mueller@canonical.com>
* Marco Trevisan <marco.trevisan@canonical.com>
*/
#include <Nux/Nux.h>
#include <NuxGraphics/CairoGraphics.h>
#include "unity-shared/CairoTexture.h"
#include "unity-shared/RawPixel.h"
#include "PlacesVScrollBar.h"
namespace unity
{
namespace dash
{
namespace
{
const RawPixel BUTTONS_HEIGHT = 15_em;
const RawPixel WIDTH = 3_em;
}
PlacesVScrollBar::PlacesVScrollBar(NUX_FILE_LINE_DECL)
: nux::VScrollBar(NUX_FILE_LINE_PARAM)
, scale(1.0)
{
UpdateSize();
scale.changed.connect([this] (double scale) {
UpdateSize();
QueueRelayout();
QueueDraw();
});
}
void PlacesVScrollBar::UpdateSize()
{
_scroll_up_button->SetMaximumHeight(BUTTONS_HEIGHT.CP(scale));
_scroll_up_button->SetMinimumHeight(BUTTONS_HEIGHT.CP(scale));
_scroll_down_button->SetMaximumHeight(BUTTONS_HEIGHT.CP(scale));
_scroll_down_button->SetMinimumHeight(BUTTONS_HEIGHT.CP(scale));
_slider->SetMinimumWidth(WIDTH.CP(scale));
_slider->SetMaximumWidth(WIDTH.CP(scale));
SetMinimumWidth(WIDTH.CP(scale));
SetMaximumWidth(WIDTH.CP(scale));
}
void PlacesVScrollBar::PreLayoutManagement()
{
nux::VScrollBar::PreLayoutManagement();
}
long
PlacesVScrollBar::PostLayoutManagement(long LayoutResult)
{
long ret = nux::VScrollBar::PostLayoutManagement(LayoutResult);
UpdateTexture();
return ret;
}
void
PlacesVScrollBar::Draw(nux::GraphicsEngine& graphics_engine, bool force_draw)
{
if (!RedirectedAncestor())
{
DrawScrollbar(graphics_engine);
}
}
void
PlacesVScrollBar::DrawContent(nux::GraphicsEngine& graphics_engine, bool force_draw)
{
if (RedirectedAncestor())
{
DrawScrollbar(graphics_engine);
}
}
void
PlacesVScrollBar::DrawScrollbar(nux::GraphicsEngine& graphics_engine)
{
// check if textures have been computed... if they haven't, exit function
if (!slider_texture_)
return;
nux::Color color = nux::color::White;
nux::Geometry const& base = GetGeometry();
nux::TexCoordXForm texxform;
graphics_engine.PushClippingRectangle(base);
unsigned int alpha = 0, src = 0, dest = 0;
graphics_engine.GetRenderStates().GetBlend(alpha, src, dest);
texxform.SetTexCoordType(nux::TexCoordXForm::OFFSET_SCALE_COORD);
graphics_engine.GetRenderStates().SetBlend(true);
graphics_engine.GetRenderStates().SetPremultipliedBlend(nux::SRC_OVER);
if (content_height_ > container_height_)
{
nux::Geometry const& slider_geo = _slider->GetGeometry();
graphics_engine.QRP_1Tex(slider_geo.x,
slider_geo.y,
slider_geo.width,
slider_geo.height,
slider_texture_->GetDeviceTexture(),
texxform,
color);
}
graphics_engine.PopClippingRectangle();
graphics_engine.GetRenderStates().SetBlend(alpha, src, dest);
}
void PlacesVScrollBar::UpdateTexture()
{
// update texture of slider
int width = _slider->GetBaseWidth();
int height = _slider->GetBaseHeight();
if (slider_texture_ && slider_texture_->GetWidth() == width && slider_texture_->GetHeight() == height)
return;
nux::CairoGraphics cg(CAIRO_FORMAT_ARGB32, width, height);
auto* cr = cg.GetInternalContext();
cairo_surface_set_device_scale(cairo_get_target(cr), scale, scale);
cairo_set_operator(cr, CAIRO_OPERATOR_CLEAR);
cairo_paint(cr);
cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
cairo_set_source_rgba(cr, 1.0f, 1.0f, 1.0f, 1.0f);
cg.DrawRoundedRectangle(cr, 1.0f, 0.0, 0.0, 1.5, 3.0, static_cast<double>(height)/scale() - 3.0);
cairo_fill(cr);
slider_texture_ = texture_ptr_from_cairo_graphics(cg);
}
} // namespace dash
} // namespace unity
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