137 lines
4 KiB
C++
137 lines
4 KiB
C++
/*
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timeline.cpp - Implementation of the timeline 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-body.hpp"
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#include "../timeline-widget.hpp"
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using namespace Gtk;
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using namespace std;
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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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TimelineBody::TimelineBody(lumiera::gui::widgets::TimelineWidget *timeline_widget) :
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Glib::ObjectBase("TimelineBody"),
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timelineWidget(timeline_widget)
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{
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g_assert(timelineWidget != NULL);
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// Connect up some events
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timelineWidget->horizontalAdjustment.signal_value_changed().connect(
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sigc::mem_fun(this, &TimelineBody::on_scroll) );
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timelineWidget->verticalAdjustment.signal_value_changed().connect(
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sigc::mem_fun(this, &TimelineBody::on_scroll) );
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// Install style properties
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gtk_widget_class_install_style_property(
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GTK_WIDGET_CLASS(G_OBJECT_GET_CLASS(gobj())),
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g_param_spec_boxed("track_background",
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"Track Background",
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"The background colour of timeline tracks",
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GDK_TYPE_COLOR, G_PARAM_READABLE));
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}
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void
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TimelineBody::on_scroll()
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{
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queue_draw();
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}
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bool
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TimelineBody::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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Gtk::Allocation allocation = get_allocation();
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Cairo::RefPtr<Cairo::Context> cairo = window->create_cairo_context();
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// Translate the view by the scroll distance
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cairo->translate(
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-(int)timelineWidget->horizontalAdjustment.get_value(),
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-(int)timelineWidget->verticalAdjustment.get_value());
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// Interate drawing each track
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vector<timeline::Track*>::iterator i;
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for(i = timelineWidget->tracks.begin();
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i != timelineWidget->tracks.end(); i++)
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{
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timeline::Track *track = *i;
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g_assert(track != NULL);
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const int track_height = track->get_height();
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// Draw the track background
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cairo->rectangle(0, 0, allocation.get_width(), track_height);
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gdk_cairo_set_source_color(cairo->cobj(), &track_background);
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cairo->fill();
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// Render the track
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cairo->save();
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track->draw_track(cairo);
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cairo->restore();
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// Shift for the next track
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cairo->translate(0, track_height + TimelineWidget::TrackPadding);
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}
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return true;
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}
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void
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TimelineBody::read_styles()
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{
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GdkColor *colour;
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gtk_widget_style_get(Widget::gobj(), "track_background", &colour, NULL);
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// Did the color load successfully?
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if(colour != NULL)
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track_background = *colour;
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else
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{
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g_warning("track_background style value failed to load");
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track_background.red = 0x0000;
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track_background.green = 0x0000;
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track_background.blue = 0x0000;
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track_background.pixel = 0x00000000;
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}
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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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