mewin/nana
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

fix bug where picture throws if image is empty

Browse Source
This commit is contained in:
Jinhao 2017-11-02 17:55:14 +08:00
parent 74f5a8f40b
commit 3dc7e3ae5b
2 changed files with 26 additions and 23 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
include/nana/gui/widgets/picture.hpp
View File

@ -36,7 +36,6 @@ namespace nana
void attached(widget_reference, graph_reference) override;
private:
void refresh(graph_reference) override;
void _m_draw_background(unsigned,unsigned);
private:
implement * const impl_;
};

48
source/gui/widgets/picture.cpp
View File

@ -48,6 +48,22 @@ namespace nana
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;
void draw_background(const size& dimension)
{
if (graph_ptr && (!API::dev::copy_transparent_background(*wdg_ptr, *graph_ptr)))
{
if (dimension.width < graph_ptr->size().width || dimension.height < graph_ptr->size().height || backimg.image.alpha())
{
if (gradual_bground.gradual_from.invisible() || gradual_bground.gradual_to.invisible())
graph_ptr->rectangle(true, wdg_ptr->bgcolor());
else if (gradual_bground.gradual_from == gradual_bground.gradual_to)
graph_ptr->rectangle(true, gradual_bground.gradual_from);
else
graph_ptr->gradual_rectangle(::nana::rectangle{ graph_ptr->size() }, gradual_bground.gradual_from, gradual_bground.gradual_to, !gradual_bground.horizontal);
}
}
}
};
class content_measurer
@ -106,6 +122,13 @@ namespace nana
if (!backimg.bground)
{
if (backimg.image.empty())
{
impl_->draw_background({});
graph.setsta();
return;
}
auto valid_area = backimg.valid_area;
if (valid_area.empty())
valid_area.dimension(backimg.image.size());
@ -142,7 +165,7 @@ namespace nana
}
}
_m_draw_background(fit_size.width, fit_size.height);
impl_->draw_background(fit_size);
backimg.image.stretch(valid_area, graph, ::nana::rectangle{ pos, fit_size });
}
@ -173,7 +196,7 @@ namespace nana
break;
}
_m_draw_background(valid_area.width, valid_area.height);
impl_->draw_background(valid_area.dimension());
if ( ! backimg.image.empty())
backimg.image.paste(valid_area, graph, pos);
@ -181,7 +204,7 @@ namespace nana
}
else
{
_m_draw_background(graphsize.width, graphsize.height);
impl_->draw_background(graphsize);
color invalid_clr_for_call;
backimg.bground->draw(graph, invalid_clr_for_call, invalid_clr_for_call, rectangle{ graphsize }, element_state::normal);
@ -189,25 +212,6 @@ namespace nana
graph.setsta();
}
void drawer::_m_draw_background(unsigned w, unsigned h)
{
auto graph = impl_->graph_ptr;
if (graph && (!API::dev::copy_transparent_background(*impl_->wdg_ptr, *graph)))
{
if (w < graph->size().width || h < graph->size().height || 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(::nana::rectangle{ graph->size() }, bground.gradual_from, bground.gradual_to, !bground.horizontal);
}
}
}
//end class drawer
}//end namespace picture
}//end namespace drawerbase