507 lines
13 KiB
C++
507 lines
13 KiB
C++
/*
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timeline-widget.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
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the 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 "timeline-widget.hpp"
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#include <boost/foreach.hpp>
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#include <typeinfo>
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using namespace Gtk;
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using namespace std;
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using namespace boost;
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using namespace util;
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using namespace gui::widgets::timeline;
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using namespace lumiera;
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namespace gui {
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namespace widgets {
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const int TimelineWidget::TrackPadding = 1;
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const int TimelineWidget::HeaderWidth = 150;
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const int TimelineWidget::HeaderIndentWidth = 10;
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const double TimelineWidget::ZoomIncrement = 1.25;
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const int64_t TimelineWidget::MaxScale = 30000000;
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TimelineWidget::TimelineWidget(
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boost::shared_ptr<timeline::TimelineState> source_state) :
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Table(2, 2),
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layoutHelper(*this),
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headerContainer(NULL),
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body(NULL),
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ruler(NULL),
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horizontalAdjustment(0, 0, 0),
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verticalAdjustment(0, 0, 0),
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horizontalScroll(horizontalAdjustment),
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verticalScroll(verticalAdjustment),
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update_tracks_frozen(false)
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{
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body = manage(new TimelineBody(*this));
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ENSURE(body != NULL);
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headerContainer = manage(new TimelineHeaderContainer(*this));
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ENSURE(headerContainer != NULL);
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ruler = manage(new TimelineRuler(*this));
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ENSURE(ruler != NULL);
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horizontalAdjustment.signal_value_changed().connect( sigc::mem_fun(
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this, &TimelineWidget::on_scroll) );
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verticalAdjustment.signal_value_changed().connect( sigc::mem_fun(
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this, &TimelineWidget::on_scroll) );
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body->signal_motion_notify_event().connect( sigc::mem_fun(
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this, &TimelineWidget::on_motion_in_body_notify_event) );
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update_tracks();
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attach(*body, 1, 2, 1, 2, FILL|EXPAND, FILL|EXPAND);
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attach(*ruler, 1, 2, 0, 1, FILL|EXPAND, SHRINK);
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attach(*headerContainer, 0, 1, 1, 2, SHRINK, FILL|EXPAND);
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attach(horizontalScroll, 1, 2, 2, 3, FILL|EXPAND, SHRINK);
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attach(verticalScroll, 2, 3, 1, 2, SHRINK, FILL|EXPAND);
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set_state(source_state);
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set_tool(timeline::Arrow);
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}
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TimelineWidget::~TimelineWidget()
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{
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REQUIRE(headerContainer);
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headerContainer->clear_headers();
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trackMap.clear();
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}
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/* ===== Data Access ===== */
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boost::shared_ptr<timeline::TimelineState>
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TimelineWidget::get_state()
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{
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return state;
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}
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void
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TimelineWidget::set_state(shared_ptr<timeline::TimelineState> new_state)
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{
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state = new_state;
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// Clear the track tree
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trackMap.clear();
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if (state)
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{
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// Hook up event handlers
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state->get_view_window().changed_signal().connect( sigc::mem_fun(
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this, &TimelineWidget::on_view_window_changed) );
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state->get_sequence()->get_child_track_list().signal_changed().
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connect(sigc::mem_fun(
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this, &TimelineWidget::on_track_list_changed ) );
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state->selection_changed_signal().connect(mem_fun(*this,
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&TimelineWidget::on_body_changed));
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state->playback_changed_signal().connect(mem_fun(*this,
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&TimelineWidget::on_body_changed));
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}
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update_tracks();
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// Send the state changed signal
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stateChangedSignal.emit();
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}
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void
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TimelineWidget::zoom_view(int zoom_size)
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{
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if(state)
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{
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const int view_width = body->get_allocation().get_width();
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state->get_view_window().zoom_view(view_width / 2, zoom_size);
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}
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}
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ToolType
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TimelineWidget::get_tool() const
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{
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REQUIRE(body != NULL);
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return body->get_tool();
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}
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void
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TimelineWidget::set_tool(ToolType tool_type)
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{
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REQUIRE(body != NULL);
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body->set_tool(tool_type);
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}
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shared_ptr<timeline::Track>
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TimelineWidget::get_hovering_track() const
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{
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return hoveringTrack;
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}
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/* ===== Signals ===== */
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sigc::signal<void, lumiera::Time>
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TimelineWidget::mouse_hover_signal() const
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{
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return mouseHoverSignal;
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}
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sigc::signal<void>
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TimelineWidget::playback_period_drag_released_signal() const
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{
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return playbackPeriodDragReleasedSignal;
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}
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sigc::signal<void, shared_ptr<timeline::Track> >
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TimelineWidget::hovering_track_changed_signal() const
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{
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return hoveringTrackChangedSignal;
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}
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sigc::signal<void>
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TimelineWidget::state_changed_signal() const
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{
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return stateChangedSignal;
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}
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/* ===== Events ===== */
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void
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TimelineWidget::on_scroll()
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{
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if(state)
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state->get_view_window().set_time_offset(
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Time((gavl_time_t)horizontalAdjustment.get_value()));
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}
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void
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TimelineWidget::on_size_allocate(Allocation& allocation)
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{
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Widget::on_size_allocate(allocation);
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update_scroll();
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}
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void
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TimelineWidget::on_view_window_changed()
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{
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REQUIRE(ruler != NULL);
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if(state)
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{
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timeline::TimelineViewWindow &window = state->get_view_window();
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const int view_width = body->get_allocation().get_width();
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horizontalAdjustment.set_page_size(
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window.get_time_scale() * view_width);
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horizontalAdjustment.set_value(window.get_time_offset());
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}
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}
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void
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TimelineWidget::on_body_changed()
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{
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REQUIRE(ruler != NULL);
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REQUIRE(body != NULL);
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ruler->queue_draw();
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body->queue_draw();
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}
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void
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TimelineWidget::on_add_track_command()
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{
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// # TEST CODE
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if(sequence())
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sequence()->get_child_track_list().push_back(
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shared_ptr<model::Track>(new model::ClipTrack()));
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}
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/* ===== Internals ===== */
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void
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TimelineWidget::update_tracks()
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{
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if(update_tracks_frozen)
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return;
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if(state)
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{
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// Remove any tracks which are no longer present in the model
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remove_orphaned_tracks();
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// Create timeline tracks from all the model tracks
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create_timeline_tracks();
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// Update the layout helper
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layoutHelper.clone_tree_from_sequence();
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layoutHelper.update_layout();
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}
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else
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trackMap.clear();
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}
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void
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TimelineWidget::freeze_update_tracks()
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{
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update_tracks_frozen = true;
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}
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void
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TimelineWidget::thaw_update_tracks()
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{
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update_tracks_frozen = false;
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}
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void
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TimelineWidget::create_timeline_tracks()
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{
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REQUIRE(state);
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BOOST_FOREACH(shared_ptr<model::Track> child,
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sequence()->get_child_tracks())
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create_timeline_tracks_from_branch(child);
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// Update the header container
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REQUIRE(headerContainer != NULL);
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headerContainer->update_headers();
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}
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void
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TimelineWidget::create_timeline_tracks_from_branch(
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shared_ptr<model::Track> modelTrack)
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{
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REQUIRE(modelTrack);
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// Is a timeline UI track present in the map already?
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if(!contains(trackMap, modelTrack))
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{
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// The timeline UI track is not present
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// We will need to create one
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trackMap[modelTrack] =
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create_timeline_track_from_modelTrack(modelTrack);
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}
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// Recurse to child tracks
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BOOST_FOREACH(shared_ptr<model::Track> child,
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modelTrack->get_child_tracks())
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create_timeline_tracks_from_branch(child);
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}
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shared_ptr<timeline::Track>
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TimelineWidget::create_timeline_track_from_modelTrack(
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shared_ptr<model::Track> modelTrack)
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{
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REQUIRE(modelTrack);
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// Choose a corresponding timeline track class from the model track's
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// class
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if(typeid(*modelTrack) == typeid(model::ClipTrack))
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return shared_ptr<timeline::Track>(new timeline::ClipTrack(
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*this, dynamic_pointer_cast<model::ClipTrack>(modelTrack)));
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else if(typeid(*modelTrack) == typeid(model::GroupTrack))
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return shared_ptr<timeline::Track>(new timeline::GroupTrack(
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*this, dynamic_pointer_cast<model::GroupTrack>(modelTrack)));
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ASSERT(NULL); // Unknown track type;
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return shared_ptr<timeline::Track>();
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}
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void
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TimelineWidget::remove_orphaned_tracks()
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{
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std::map<boost::shared_ptr<model::Track>,
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boost::shared_ptr<timeline::Track> >
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orphan_track_map(trackMap);
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// Remove all tracks which are still present in the sequence
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BOOST_FOREACH(shared_ptr<model::Track> child,
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sequence()->get_child_tracks())
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search_orphaned_tracks_in_branch(child, orphan_track_map);
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// orphan_track_map now contains all the orphaned tracks
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// Remove them
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std::pair<shared_ptr<model::Track>, shared_ptr<timeline::Track> >
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pair;
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BOOST_FOREACH( pair, orphan_track_map )
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{
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ENSURE(pair.first);
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trackMap.erase(pair.first);
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}
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}
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void
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TimelineWidget::search_orphaned_tracks_in_branch(
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boost::shared_ptr<model::Track> modelTrack,
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std::map<boost::shared_ptr<model::Track>,
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boost::shared_ptr<timeline::Track> > &orphan_track_map)
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{
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REQUIRE(modelTrack);
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// Is the timeline UI still present?
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if(contains(orphan_track_map, modelTrack))
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orphan_track_map.erase(modelTrack);
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// Recurse to child tracks
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BOOST_FOREACH(shared_ptr<model::Track> child,
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modelTrack->get_child_tracks())
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search_orphaned_tracks_in_branch(child, orphan_track_map);
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}
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shared_ptr<timeline::Track>
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TimelineWidget::lookup_timeline_track(
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shared_ptr<model::Track> modelTrack) const
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{
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REQUIRE(modelTrack);
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REQUIRE(modelTrack != sequence()); // The sequence isn't
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// really a track
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std::map<shared_ptr<model::Track>, shared_ptr<timeline::Track> >::
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const_iterator iterator = trackMap.find(modelTrack);
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if(iterator == trackMap.end())
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{
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// The track is not present in the map
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// We are in an error condition if the timeline track is not found
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// - the timeline tracks must always be synchronous with the model
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// tracks.
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ENSURE(0);
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return shared_ptr<timeline::Track>();
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}
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ENSURE(iterator->second != NULL);
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return iterator->second;
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}
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void
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TimelineWidget::on_layout_changed()
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{
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REQUIRE(headerContainer != NULL);
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REQUIRE(body != NULL);
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headerContainer->on_layout_changed();
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body->queue_draw();
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update_scroll();
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}
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void
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TimelineWidget::update_scroll()
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{
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REQUIRE(body != NULL);
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const Allocation body_allocation = body->get_allocation();
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if(state)
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{
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timeline::TimelineViewWindow &window = state->get_view_window();
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//----- Horizontal Scroll ------//
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// TEST CODE
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horizontalAdjustment.set_upper(1000 * GAVL_TIME_SCALE / 200);
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horizontalAdjustment.set_lower(-1000 * GAVL_TIME_SCALE / 200);
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// Set the page size
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horizontalAdjustment.set_page_size(
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window.get_time_scale() * body_allocation.get_width());
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//----- Vertical Scroll -----//
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// Calculate the vertical length that can be scrolled:
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// the total height of all the tracks minus one screenful
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int y_scroll_length = layoutHelper.get_total_height() -
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body_allocation.get_height();
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if(y_scroll_length < 0) y_scroll_length = 0;
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// If by resizing we're now over-scrolled, scroll back to
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// maximum distance
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if((int)verticalAdjustment.get_value() > y_scroll_length)
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verticalAdjustment.set_value(y_scroll_length);
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verticalAdjustment.set_upper(y_scroll_length);
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// Hide the scrollbar if no scrolling is possible
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#if 0
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// Having this code included seems to cause a layout loop as the
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// window is shrunk
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if(y_scroll_length <= 0 && verticalScroll.is_visible())
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verticalScroll.hide();
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else if(y_scroll_length > 0 && !verticalScroll.is_visible())
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verticalScroll.show();
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#endif
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}
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}
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int
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TimelineWidget::get_y_scroll_offset() const
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{
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return (int)verticalAdjustment.get_value();
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}
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void
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TimelineWidget::set_y_scroll_offset(const int offset)
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{
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verticalAdjustment.set_value(offset);
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}
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bool
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TimelineWidget::on_motion_in_body_notify_event(GdkEventMotion *event)
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{
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REQUIRE(event != NULL);
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ruler->set_mouse_chevron_offset(event->x);
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if(state)
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{
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timeline::TimelineViewWindow &window = state->get_view_window();
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mouseHoverSignal.emit(window.x_to_time(event->x));
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}
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return true;
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}
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boost::shared_ptr<model::Sequence>
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TimelineWidget::sequence() const
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{
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if(!state)
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return shared_ptr<model::Sequence>();
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shared_ptr<model::Sequence> sequence = state->get_sequence();
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ENSURE(sequence);
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return sequence;
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}
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void
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TimelineWidget::on_track_list_changed()
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{
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update_tracks();
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}
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void
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TimelineWidget::on_playback_period_drag_released()
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{
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playbackPeriodDragReleasedSignal.emit();
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}
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void
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TimelineWidget::set_hovering_track(
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shared_ptr<timeline::Track> hovering_track)
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{
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hoveringTrack = hovering_track;
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hoveringTrackChangedSignal.emit(hovering_track);
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}
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} // namespace widgets
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} // namespace gui
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