151 lines
3.6 KiB
C++
151 lines
3.6 KiB
C++
/*
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timeline-ibeam-tool.cpp - Implementation of the IBeamTool class
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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 "timeline-ibeam-tool.hpp"
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#include "../timeline-widget.hpp"
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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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const int IBeamTool::ScrollSlideRateDivisor = 16;
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IBeamTool::IBeamTool(TimelineBody *timeline_body) :
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dragStartTime(0),
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scrollSlideRate(0),
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Tool(timeline_body)
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{
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}
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IBeamTool::~IBeamTool()
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{
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end_scroll_slide();
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}
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ToolType
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IBeamTool::get_type() const
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{
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return IBeam;
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}
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Gdk::Cursor
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IBeamTool::get_cursor() const
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{
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return Gdk::Cursor(Gdk::XTERM);
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}
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void
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IBeamTool::on_button_press_event(GdkEventButton* event)
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{
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Tool::on_button_press_event(event);
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lumiera::gui::widgets::TimelineWidget *timeline_widget =
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get_timeline_widget();
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if(event->button == 1)
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{
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dragStartTime = timeline_widget->x_to_time(event->x);
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timeline_widget->set_selection(dragStartTime, dragStartTime);
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}
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}
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void
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IBeamTool::on_button_release_event(GdkEventButton* event)
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{
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Tool::on_button_release_event(event);
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if(event->button == 1)
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set_leading_x(event->x);
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}
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void
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IBeamTool::on_motion_notify_event(GdkEventMotion *event)
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{
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Tool::on_motion_notify_event(event);
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if(isDragging)
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{
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set_leading_x(event->x);
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// Is the mouse out of bounds? if so we must begin scrolling
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const Gdk::Rectangle body_rect(get_body_rectangle());
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if(event->x < 0)
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begin_scroll_slide(
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event->x / ScrollSlideRateDivisor);
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else if(event->x > body_rect.get_width())
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begin_scroll_slide(
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(event->x - body_rect.get_width()) / ScrollSlideRateDivisor);
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else end_scroll_slide();
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}
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}
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bool
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IBeamTool::on_scroll_slide_timer()
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{
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lumiera::gui::widgets::TimelineWidget *timeline_widget =
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get_timeline_widget();
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timeline_widget->shift_view(scrollSlideRate);
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// Return true to keep the timer going
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return true;
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}
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void
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IBeamTool::set_leading_x(const int x)
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{
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REQUIRE(timelineBody != NULL);
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lumiera::gui::widgets::TimelineWidget *timeline_widget =
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timelineBody->timelineWidget;
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REQUIRE(timeline_widget != NULL);
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const gavl_time_t time = timeline_widget->x_to_time(x);
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if(time > dragStartTime)
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timeline_widget->set_selection(dragStartTime, time);
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else
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timeline_widget->set_selection(time, dragStartTime);
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}
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void
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IBeamTool::begin_scroll_slide(int scroll_slide_rate)
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{
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scrollSlideRate = scroll_slide_rate;
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if(!scrollSlideEvent.connected())
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scrollSlideEvent = Glib::signal_timeout().connect(
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sigc::mem_fun(this, &IBeamTool::on_scroll_slide_timer), 40);
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}
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void
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IBeamTool::end_scroll_slide()
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{
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scrollSlideRate = 0;
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if(scrollSlideEvent.connected())
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scrollSlideEvent.disconnect();
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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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