113 lines
3.3 KiB
C++
113 lines
3.3 KiB
C++
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/*
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timeline-ruler.cpp - Implementation of the time ruler widget
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Copyright (C) Lumiera.org
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2008, Joel Holdsworth <joel@airwebreathe.org.uk>
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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* *****************************************************/
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#include <cairomm-1.0/cairomm/cairomm.h>
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#include "timeline-ruler.hpp"
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#include "../../window-manager.hpp"
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extern "C" {
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#include <gavl/gavltime.h>
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#include "../../../lib/time.h"
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}
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using namespace Gtk;
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using namespace std;
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using namespace lumiera::gui;
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using namespace lumiera::gui::widgets;
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using namespace lumiera::gui::widgets::timeline;
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namespace lumiera {
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namespace gui {
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namespace widgets {
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namespace timeline {
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TimelineRuler::TimelineRuler() :
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Glib::ObjectBase("TimelineRuler")
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{
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set_flags(Gtk::NO_WINDOW); // This widget will not have a window
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set_size_request(-1, 20);
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// Install style properties
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timeScale = GAVL_TIME_SCALE / 200;
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timeOffset = 0;
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}
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bool
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TimelineRuler::on_expose_event(GdkEventExpose* event)
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{
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// This is where we draw on the window
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Glib::RefPtr<Gdk::Window> window = get_window();
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if(!window)
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return false;
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// Makes sure the widget styles have been loaded
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read_styles();
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// Prepare to render via cairo
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Allocation allocation = get_allocation();
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Glib::RefPtr<Style> style = get_style();
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Cairo::RefPtr<Cairo::Context> cairo = window->create_cairo_context();
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Glib::RefPtr<Pango::Layout> pango_layout = create_pango_layout("");
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cairo->translate(allocation.get_x(), allocation.get_y());
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// Render the background
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Gdk::Cairo::set_source_color(cairo, style->get_bg(STATE_NORMAL));
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cairo->rectangle(0, 0, allocation.get_width(), allocation.get_height());
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cairo->fill();
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// Render ruler annotations
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gavl_time_t major_spacing = GAVL_TIME_SCALE;
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int64_t time_offset = timeOffset;
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while(time_offset / timeScale < allocation.get_width())
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{
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pango_layout->set_text(lumiera_tmpbuf_print_time(time_offset));
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Pango::Rectangle text_extents = pango_layout->get_logical_extents();
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Gdk::Cairo::set_source_color(cairo, style->get_fg(STATE_NORMAL));
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const int64_t x = time_offset / timeScale;
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cairo->move_to(x, (allocation.get_height() - text_extents.get_height() / Pango::SCALE) / 2);
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pango_layout->add_to_cairo_context(cairo);
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cairo->fill();
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time_offset += major_spacing;
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}
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return true;
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}
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void
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TimelineRuler::read_styles()
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{
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//background = WindowManager::read_style_colour_property(
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// *this, "background", 0, 0, 0);
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}
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} // namespace timeline
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} // namespace widgets
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} // namespace gui
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} // namespace lumiera
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