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#include <cairomm/cairomm.h>
#include <gtkmm/label.h>
#include "pbd/xml++.h"
#include "canvas/text.h"
#include "canvas/canvas.h"
#include "canvas/utils.h"
using namespace std;
using namespace ArdourCanvas;
Text::Text (Group* parent)
: Item (parent)
, _color (0x000000ff)
, _font_description (0)
, _alignment (Pango::ALIGN_LEFT)
, _width (0)
, _height (0)
, _need_redraw (false)
{
}
Text::~Text ()
{
delete _font_description;
}
void
Text::set (string const & text)
{
begin_change ();
_text = text;
_need_redraw = true;
_bounding_box_dirty = true;
end_change ();
}
void
Text::redraw (Cairo::RefPtr<Cairo::Context> context) const
{
Glib::RefPtr<Pango::Layout> layout = Pango::Layout::create (context);
layout->set_text (_text);
if (_font_description) {
layout->set_font_description (*_font_description);
}
layout->set_alignment (_alignment);
Pango::Rectangle ink_rect = layout->get_ink_extents();
_origin.x = ink_rect.get_x() / Pango::SCALE;
_origin.y = ink_rect.get_y() / Pango::SCALE;
_width = _origin.x + ((ink_rect.get_width() + Pango::SCALE / 2) / Pango::SCALE);
_height = _origin.y + ((ink_rect.get_height() + Pango::SCALE / 2) / Pango::SCALE);
_image = Cairo::ImageSurface::create (Cairo::FORMAT_ARGB32, _width, _height);
Cairo::RefPtr<Cairo::Context> img_context = Cairo::Context::create (_image);
/* and draw, in the appropriate color of course */
set_source_rgba (img_context, _color);
std::cerr << "render " << _text << " as "
<< ((_color >> 24) & 0xff) / 255.0
<< ((_color >> 16) & 0xff) / 255.0
<< ((_color >> 8) & 0xff) / 255.0
<< ((_color >> 0) & 0xff) / 255.
<< std::endl;
layout->show_in_cairo_context (img_context);
/* text has now been rendered in _image and is ready for blit in
* ::render
*/
_need_redraw = false;
}
void
Text::compute_bounding_box () const
{
if (!_canvas || !_canvas->context () || _text.empty()) {
_bounding_box = boost::optional<Rect> ();
_bounding_box_dirty = false;
return;
}
redraw (_canvas->context());
_bounding_box = Rect (_origin.x, _origin.y, _width - _origin.x, _height - _origin.y);
_bounding_box_dirty = false;
cerr << "bbox for " << _text << " = " << _bounding_box << endl;
}
void
Text::render (Rect const & /*area*/, Cairo::RefPtr<Cairo::Context> context) const
{
if (_text.empty()) {
return;
}
if (_need_redraw) {
redraw (context);
}
cerr << " with " << _origin << " and " << _width << " x " << _height << " render " << _text << endl;
context->set_source (_image, 0, 0);
context->rectangle (0, 0, _width, _height);
context->fill ();
}
XMLNode *
Text::get_state () const
{
XMLNode* node = new XMLNode ("Text");
#ifdef CANVAS_DEBUG
if (!name.empty ()) {
node->add_property ("name", name);
}
#endif
return node;
}
void
Text::set_state (XMLNode const * /*node*/)
{
/* XXX */
}
void
Text::set_alignment (Pango::Alignment alignment)
{
begin_change ();
_alignment = alignment;
_need_redraw = true;
_bounding_box_dirty = true;
end_change ();
}
void
Text::set_font_description (Pango::FontDescription font_description)
{
begin_change ();
_font_description = new Pango::FontDescription (font_description);
_need_redraw = true;
_bounding_box_dirty = true;
end_change ();
}
void
Text::set_color (Color color)
{
begin_change ();
_color = color;
_need_redraw = true;
end_change ();
}
void
Text::dump (ostream& o) const
{
Item::dump (o);
o << _canvas->indent() << '\t' << " text = " << _text << endl
<< _canvas->indent() << " color = " << _color;
o << endl;
}
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