+/*
+ Copyright (C) 2011-2013 Paul Davis
+ Author: Carl Hetherington <cth@carlh.net>
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ 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, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include <gdk/gdk.h>
+
+#include <cairomm/cairomm.h>
#include <gtkmm/label.h>
-#include "pbd/xml++.h"
+
+#include "pbd/stacktrace.h"
+
#include "canvas/text.h"
#include "canvas/canvas.h"
#include "canvas/utils.h"
Text::Text (Group* parent)
: Item (parent)
- , _font_description (0)
, _color (0x000000ff)
+ , _font_description (0)
, _alignment (Pango::ALIGN_LEFT)
+ , _width (0)
+ , _height (0)
+ , _need_redraw (false)
+ , _clamped_width (COORD_MAX)
{
}
begin_change ();
_text = text;
-
+
+ _need_redraw = true;
_bounding_box_dirty = true;
+
end_change ();
}
void
-Text::compute_bounding_box () const
+Text::redraw (Cairo::RefPtr<Cairo::Context> context) const
{
- if (!_canvas || !_canvas->context ()) {
- _bounding_box = boost::optional<Rect> ();
- _bounding_box_dirty = false;
+ if (_text.empty()) {
return;
}
-
- Pango::Rectangle const r = layout (_canvas->context())->get_ink_extents ();
-
- _bounding_box = Rect (
- r.get_x() / Pango::SCALE,
- r.get_y() / Pango::SCALE,
- (r.get_x() + r.get_width()) / Pango::SCALE,
- (r.get_y() + r.get_height()) / Pango::SCALE
- );
-
- _bounding_box_dirty = false;
+
+ Glib::RefPtr<Pango::Layout> layout = Pango::Layout::create (context);
+
+ _redraw (layout);
}
-Glib::RefPtr<Pango::Layout>
-Text::layout (Cairo::RefPtr<Cairo::Context> context) const
+void
+Text::redraw (Glib::RefPtr<Pango::Context> context) const
{
+ if (_text.empty()) {
+ return;
+ }
+
Glib::RefPtr<Pango::Layout> layout = Pango::Layout::create (context);
+ _redraw (layout);
+}
+
+void
+Text::_redraw (Glib::RefPtr<Pango::Layout> layout) const
+{
layout->set_text (_text);
+
if (_font_description) {
layout->set_font_description (*_font_description);
}
+
layout->set_alignment (_alignment);
- return layout;
+
+ int w;
+ int h;
+
+ layout->get_size (w, h);
+
+ _width = w / Pango::SCALE;
+ _height = h / 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);
+
+ 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::render (Rect const & /*area*/, Cairo::RefPtr<Cairo::Context> context) const
{
- set_source_rgba (context, _color);
- layout (context)->show_in_cairo_context (context);
+ if (_text.empty()) {
+ return;
+ }
+
+ if (_need_redraw) {
+ redraw (context);
+ }
+
+ Rect self = item_to_window (Rect (0, 0, min (_clamped_width, _width), _height));
+
+ context->rectangle (self.x0, self.y0, self.width(), self.height());
+ context->set_source (_image, self.x0, self.y0);
+ context->fill ();
}
-XMLNode *
-Text::get_state () const
+void
+Text::clamp_width (double w)
{
- XMLNode* node = new XMLNode ("Text");
-#ifdef CANVAS_DEBUG
- if (!name.empty ()) {
- node->add_property ("name", name);
- }
-#endif
- return node;
+ _clamped_width = w;
}
void
-Text::set_state (XMLNode const * /*node*/)
+Text::compute_bounding_box () const
{
- /* XXX */
+ if (!_canvas || _text.empty()) {
+ _bounding_box = boost::optional<Rect> ();
+ _bounding_box_dirty = false;
+ return;
+ }
+
+ if (_bounding_box_dirty) {
+ if (_need_redraw || !_image) {
+ Glib::RefPtr<Pango::Context> context = Glib::wrap (gdk_pango_context_get()); // context now owns C object and will free it
+ redraw (context);
+ }
+ _bounding_box = Rect (0, 0, min (_clamped_width, (double) _image->get_width()), _image->get_height());
+ _bounding_box_dirty = false;
+ }
}
void
begin_change ();
_alignment = alignment;
-
+ _need_redraw = true;
_bounding_box_dirty = true;
end_change ();
}
begin_change ();
_font_description = new Pango::FontDescription (font_description);
+ _need_redraw = true;
_bounding_box_dirty = true;
end_change ();
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;
+}