+/*
+ 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/window.h>
#include <gtkmm/label.h>
#include "pbd/stacktrace.h"
#include "canvas/text.h"
#include "canvas/canvas.h"
#include "canvas/utils.h"
+#include "canvas/colors.h"
using namespace std;
using namespace ArdourCanvas;
-Text::Text (Group* parent)
- : Item (parent)
+
+Text::Text (Canvas* c)
+ : Item (c)
, _color (0x000000ff)
, _font_description (0)
, _alignment (Pango::ALIGN_LEFT)
, _width (0)
, _height (0)
, _need_redraw (false)
+ , _width_correction (-1)
, _clamped_width (COORD_MAX)
{
+ _outline = false;
+}
+Text::Text (Item* parent)
+ : Item (parent)
+ , _color (0x000000ff)
+ , _font_description (0)
+ , _alignment (Pango::ALIGN_LEFT)
+ , _width (0)
+ , _height (0)
+ , _need_redraw (false)
+ , _width_correction (-1)
+ , _clamped_width (COORD_MAX)
+{
+ _outline = false;
}
Text::~Text ()
void
Text::set (string const & text)
{
+ if (text == _text) {
+ return;
+ }
+
begin_change ();
-
+
_text = text;
_need_redraw = true;
}
void
-Text::redraw (Cairo::RefPtr<Cairo::Context> context) const
+Text::_redraw () const
{
+ assert (!_text.empty());
+ Glib::RefPtr<Pango::Context> context = Glib::wrap (gdk_pango_context_get());
Glib::RefPtr<Pango::Layout> layout = Pango::Layout::create (context);
+#ifdef __APPLE__
+ if (_width_correction < 0.0) {
+ // Pango returns incorrect text width on some OS X
+ // So we have to make a correction
+ // To determine the correct indent take the largest symbol for which the width is correct
+ // and make the calculation
+ Gtk::Window win;
+ Gtk::Label foo;
+ win.add (foo);
+ win.ensure_style ();
+
+ int width = 0;
+ int height = 0;
+ Glib::RefPtr<Pango::Layout> test_layout = foo.create_pango_layout ("H");
+ if (_font_description) {
+ test_layout->set_font_description (*_font_description);
+ }
+ test_layout->get_pixel_size (width, height);
+
+ _width_correction = width*1.5;
+ }
+#else
+ /* don't bother with a conditional here */
+ _width_correction = 0.0;
+#endif
+
layout->set_text (_text);
if (_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);
- _height = _origin.y + (ink_rect.get_height() / Pango::SCALE);
-
+
+ int w;
+ int h;
+
+ layout->get_pixel_size (w, h);
+
+ _width = w + _width_correction;
+ _height = h;
+
+#ifdef __APPLE__
+ _image = Cairo::ImageSurface::create (Cairo::FORMAT_ARGB32, _width * 2, _height * 2);
+#else
_image = Cairo::ImageSurface::create (Cairo::FORMAT_ARGB32, _width, _height);
+#endif
Cairo::RefPtr<Cairo::Context> img_context = Cairo::Context::create (_image);
+#ifdef __APPLE__
+ /* Below, the rendering scaling is set to support retina display
+ */
+ img_context->scale (2, 2);
+#endif
+
/* and draw, in the appropriate color of course */
- set_source_rgba (img_context, _color);
- layout->show_in_cairo_context (img_context);
+ if (_outline) {
+ set_source_rgba (img_context, _outline_color);
+ layout->update_from_cairo_context (img_context);
+ pango_cairo_layout_path (img_context->cobj(), layout->gobj());
+ img_context->stroke_preserve ();
+ set_source_rgba (img_context, _color);
+ img_context->fill ();
+ } else {
+ 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
+ * ::render
*/
_need_redraw = false;
}
+void
+Text::render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) const
+{
+ if (_text.empty()) {
+ return;
+ }
+
+ Rect self = item_to_window (Rect (0, 0, min (_clamped_width, (double)_image->get_width ()), _image->get_height ()));
+ boost::optional<Rect> i = self.intersection (area);
+
+ if (!i) {
+ return;
+ }
+
+ if (_need_redraw) {
+ _redraw ();
+ }
+
+ Rect intersection (i.get());
+
+ context->rectangle (intersection.x0, intersection.y0, intersection.width(), intersection.height());
+#ifdef __APPLE__
+ /* Below, the rendering scaling is set to support retina display
+ */
+ Cairo::Matrix original_matrix = context->get_matrix();
+ context->scale (0.5, 0.5);
+ context->set_source (_image, self.x0 * 2, self.y0 * 2);
+ context->fill ();
+ context->set_matrix (original_matrix);
+#else
+ context->set_source (_image, self.x0, self.y0);
+ context->fill ();
+#endif
+}
+
void
Text::clamp_width (double w)
{
+ if (_clamped_width == w) {
+ return;
+ }
+ begin_change ();
_clamped_width = w;
+ _bounding_box_dirty = true;
+ end_change ();
}
void
return;
}
- PangoContext* _pc = gdk_pango_context_get ();
- Glib::RefPtr<Pango::Context> context = Glib::wrap (_pc); // context now owns _pc and will free it
- Glib::RefPtr<Pango::Layout> layout = Pango::Layout::create (context);
-
- layout->set_text (_text);
- layout->set_font_description (*_font_description);
- layout->set_alignment (_alignment);
- Pango::Rectangle const r = layout->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;
+ if (_bounding_box_dirty) {
+#ifdef __APPLE__
+ const float retina_factor = 0.5;
+#else
+ const float retina_factor = 1.0;
+#endif
+ if (_need_redraw || !_image) {
+ _redraw ();
+ }
+ _bounding_box = Rect (0, 0, min (_clamped_width, (double) _image->get_width() * retina_factor), _image->get_height() * retina_factor);
+ _bounding_box_dirty = false;
+ }
}
void
-Text::render (Rect const & /*area*/, Cairo::RefPtr<Cairo::Context> context) const
+Text::set_alignment (Pango::Alignment alignment)
{
- if (_text.empty()) {
+ if (alignment == _alignment) {
return;
}
- if (_need_redraw) {
- redraw (context);
- }
-
- context->set_source (_image, 0, 0);
- context->rectangle (0, 0, min (_clamped_width, _width), _height);
- context->fill ();
-}
-
-void
-Text::set_alignment (Pango::Alignment alignment)
-{
begin_change ();
-
+
_alignment = alignment;
_need_redraw = true;
_bounding_box_dirty = true;
Text::set_font_description (Pango::FontDescription font_description)
{
begin_change ();
-
+
_font_description = new Pango::FontDescription (font_description);
_need_redraw = true;
+ _width_correction = -1.0;
_bounding_box_dirty = true;
end_change ();
void
Text::set_color (Color color)
{
+ if (color == _color) {
+ return;
+ }
+
begin_change ();
_color = color;
+ if (_outline) {
+ set_outline_color (contrasting_text_color (_color));
+ }
_need_redraw = true;
end_change ();
}
-
+
void
Text::dump (ostream& o) const
{
o << endl;
}
+
+
+double
+Text::text_width() const
+{
+ if (_need_redraw) {
+ redraw ();
+ }
+
+ return _width;
+}
projects / ardour.git / blobdiff