293 lines
7.4 KiB
C++
293 lines
7.4 KiB
C++
/*
|
|
* A Picture Implementation
|
|
* Nana C++ Library(http://www.nanapro.org)
|
|
* Copyright(C) 2003-2015 Jinhao(cnjinhao@hotmail.com)
|
|
*
|
|
* Distributed under the Boost Software License, Version 1.0.
|
|
* (See accompanying file LICENSE_1_0.txt or copy at
|
|
* http://www.boost.org/LICENSE_1_0.txt)
|
|
*
|
|
* @file: nana/gui/widgets/picture.cpp
|
|
* @description:
|
|
* Used for showing a picture
|
|
*/
|
|
|
|
#include <nana/gui/widgets/picture.hpp>
|
|
#include <nana/paint/image.hpp>
|
|
#include <nana/gui/element.hpp>
|
|
|
|
namespace nana
|
|
{
|
|
namespace drawerbase
|
|
{
|
|
namespace picture
|
|
{
|
|
struct implement
|
|
{
|
|
widget* wdg_ptr{nullptr};
|
|
paint::graphics* graph_ptr{nullptr};
|
|
|
|
|
|
struct gradual_bground_tag
|
|
{
|
|
::nana::color gradual_from;
|
|
::nana::color gradual_to;
|
|
bool horizontal{true};
|
|
}gradual_bground;
|
|
|
|
struct back_image_tag
|
|
{
|
|
paint::image image;
|
|
rectangle valid_area;
|
|
::nana::align align_horz{ ::nana::align::left };
|
|
::nana::align_v align_vert{ ::nana::align_v::top };
|
|
std::unique_ptr<element::bground> bground; //If it is not a null ptr, the widget is stretchable mode
|
|
bool stretchable{ false }; //If it is true, the widget is stretchable mode without changing aspect ratio.
|
|
}backimg;
|
|
};
|
|
|
|
//class drawer
|
|
drawer::drawer() :impl_(new implement)
|
|
{
|
|
}
|
|
|
|
drawer::~drawer()
|
|
{
|
|
delete impl_;
|
|
}
|
|
|
|
void drawer::attached(widget_reference& wdg, graph_reference graph)
|
|
{
|
|
impl_->wdg_ptr = &wdg;
|
|
impl_->graph_ptr = &graph;
|
|
}
|
|
|
|
void drawer::refresh(graph_reference graph)
|
|
{
|
|
if (!graph.changed())
|
|
return;
|
|
|
|
auto graphsize = graph.size();
|
|
|
|
auto & backimg = impl_->backimg;
|
|
|
|
if (!backimg.bground)
|
|
{
|
|
auto valid_area = backimg.valid_area;
|
|
if (valid_area.empty())
|
|
valid_area = backimg.image.size();
|
|
|
|
if (backimg.stretchable)
|
|
{
|
|
auto fit_size = fit_zoom({ valid_area.width, valid_area.height }, graphsize);
|
|
::nana::point pos;
|
|
|
|
if (fit_size.width != graphsize.width)
|
|
{
|
|
switch (backimg.align_horz)
|
|
{
|
|
case ::nana::align::left: break;
|
|
case ::nana::align::center:
|
|
pos.x = (int(graphsize.width) - int(fit_size.width)) / 2;
|
|
break;
|
|
case ::nana::align::right:
|
|
pos.x = int(graphsize.width) - int(fit_size.width);
|
|
break;
|
|
}
|
|
}
|
|
else if (fit_size.height != graphsize.height)
|
|
{
|
|
switch (backimg.align_vert)
|
|
{
|
|
case ::nana::align_v::top: break;
|
|
case ::nana::align_v::center:
|
|
pos.y = (int(graphsize.height) - int(fit_size.height)) / 2;
|
|
break;
|
|
case ::nana::align_v::bottom:
|
|
pos.y = int(graphsize.height) - int(fit_size.height);
|
|
break;
|
|
}
|
|
}
|
|
|
|
_m_draw_background(fit_size.width, fit_size.height);
|
|
|
|
backimg.image.stretch(valid_area, graph, { pos, fit_size });
|
|
}
|
|
else
|
|
{
|
|
//The point in which position the image to be drawn.
|
|
::nana::point pos;
|
|
|
|
switch (backimg.align_horz)
|
|
{
|
|
case ::nana::align::left: break;
|
|
case ::nana::align::center:
|
|
pos.x = (int(graphsize.width) - int(valid_area.width)) / 2;
|
|
break;
|
|
case ::nana::align::right:
|
|
pos.x = int(graphsize.width) - int(valid_area.width);
|
|
break;
|
|
}
|
|
|
|
switch (backimg.align_vert)
|
|
{
|
|
case ::nana::align_v::top: break;
|
|
case ::nana::align_v::center:
|
|
pos.y = (int(graphsize.height) - int(valid_area.height)) / 2;
|
|
break;
|
|
case ::nana::align_v::bottom:
|
|
pos.y = int(graphsize.height) - int(valid_area.height);
|
|
break;
|
|
}
|
|
|
|
_m_draw_background(valid_area.width, valid_area.height);
|
|
|
|
backimg.image.paste(valid_area, graph, pos);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
_m_draw_background(graphsize.width, graphsize.height);
|
|
|
|
color invalid_clr_for_call;
|
|
backimg.bground->draw(graph, invalid_clr_for_call, invalid_clr_for_call, graphsize, element_state::normal);
|
|
}
|
|
|
|
graph.setsta();
|
|
}
|
|
|
|
void drawer::_m_draw_background(unsigned w, unsigned h)
|
|
{
|
|
auto graph = impl_->graph_ptr;
|
|
|
|
if (graph && (bground_mode::basic != API::effects_bground_mode(*impl_->wdg_ptr)))
|
|
{
|
|
if (w < graph->size().width || h < graph->size().width || impl_->backimg.image.alpha())
|
|
{
|
|
auto & bground = impl_->gradual_bground;
|
|
if (bground.gradual_from.invisible() || bground.gradual_to.invisible())
|
|
graph->rectangle(true, impl_->wdg_ptr->bgcolor());
|
|
else if (bground.gradual_from == bground.gradual_to)
|
|
graph->rectangle(true, bground.gradual_from);
|
|
else
|
|
graph->gradual_rectangle(graph->size(), bground.gradual_from, bground.gradual_to, !bground.horizontal);
|
|
}
|
|
}
|
|
}
|
|
//end class drawer
|
|
}//end namespace picture
|
|
}//end namespace drawerbase
|
|
|
|
//class picture
|
|
picture::picture(window wd, bool visible)
|
|
{
|
|
create(wd, rectangle(), visible);
|
|
}
|
|
|
|
picture::picture(window wd, const nana::rectangle& r, bool visible)
|
|
{
|
|
create(wd, r, visible);
|
|
}
|
|
|
|
void picture::load(::nana::paint::image img, const ::nana::rectangle& valid_area)
|
|
{
|
|
internal_scope_guard lock;
|
|
auto& backimg = get_drawer_trigger().impl_->backimg;
|
|
backimg.image = std::move(img);
|
|
backimg.valid_area = valid_area;
|
|
|
|
if (backimg.bground)
|
|
backimg.bground->image(backimg.image, true, valid_area);
|
|
|
|
if (handle())
|
|
{
|
|
get_drawer_trigger().impl_->graph_ptr->set_changed();
|
|
API::refresh_window(*this);
|
|
}
|
|
}
|
|
|
|
void picture::align(::nana::align horz, align_v vert)
|
|
{
|
|
internal_scope_guard lock;
|
|
|
|
auto& backimg = get_drawer_trigger().impl_->backimg;
|
|
|
|
if (backimg.align_horz == horz && backimg.align_vert == vert)
|
|
return;
|
|
|
|
backimg.align_horz = horz;
|
|
backimg.align_vert = vert;
|
|
|
|
if (handle())
|
|
{
|
|
get_drawer_trigger().impl_->graph_ptr->set_changed();
|
|
API::refresh_window(*this);
|
|
}
|
|
}
|
|
|
|
void picture::stretchable(unsigned left, unsigned top, unsigned right, unsigned bottom)
|
|
{
|
|
if (!handle())
|
|
return;
|
|
|
|
internal_scope_guard lock;
|
|
auto & backimg = get_drawer_trigger().impl_->backimg;
|
|
if (!backimg.bground)
|
|
{
|
|
backimg.bground.reset(new element::bground);
|
|
backimg.bground->states({ element_state::normal });
|
|
backimg.bground->image(backimg.image, true, backimg.valid_area);
|
|
}
|
|
|
|
backimg.bground->stretch_parts(left, top, right, bottom);
|
|
backimg.stretchable = false;
|
|
if (handle())
|
|
{
|
|
get_drawer_trigger().impl_->graph_ptr->set_changed();
|
|
API::refresh_window(*this);
|
|
}
|
|
}
|
|
|
|
void picture::stretchable(bool enables)
|
|
{
|
|
internal_scope_guard lock;
|
|
|
|
auto & backimg = get_drawer_trigger().impl_->backimg;
|
|
backimg.bground.reset();
|
|
|
|
backimg.stretchable = enables;
|
|
if (handle())
|
|
{
|
|
get_drawer_trigger().impl_->graph_ptr->set_changed();
|
|
API::refresh_window(*this);
|
|
}
|
|
}
|
|
|
|
void picture::set_gradual_background(const ::nana::color& from, const ::nana::color& to, bool horizontal)
|
|
{
|
|
auto & bground = get_drawer_trigger().impl_->gradual_bground;
|
|
bground.gradual_from = from;
|
|
bground.gradual_to = to;
|
|
bground.horizontal = horizontal;
|
|
if (handle())
|
|
{
|
|
get_drawer_trigger().impl_->graph_ptr->set_changed();
|
|
API::refresh_window(*this);
|
|
}
|
|
}
|
|
|
|
void picture::transparent(bool enabled)
|
|
{
|
|
if(enabled)
|
|
API::effects_bground(*this, effects::bground_transparent(0), 0.0);
|
|
else
|
|
API::effects_bground_remove(*this);
|
|
}
|
|
|
|
bool picture::transparent() const
|
|
{
|
|
return (bground_mode::basic == API::effects_bground_mode(*this));
|
|
}
|
|
//end class picture
|
|
}//end namespace nana
|