114 lines
2.9 KiB
C++
114 lines
2.9 KiB
C++
/*
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timeline-ibeam-tool.hpp - Declaration of the ArrowTool 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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/** @file timeline-ibeam-tool.hpp
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** This file contains the definition of ibeam tool class
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** tool objects
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*/
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#ifndef TIMELINE_IBEAM_TOOL_HPP
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#define TIMELINE_IBEAM_TOOL_HPP
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#include <gtkmm.h>
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#include "timeline-tool.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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/**
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* A helper class to implement the timeline i-beam tool
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*/
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class IBeamTool : public Tool
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{
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public:
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/**
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* Constructor
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* @param timeline_body The owner timeline body object
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*/
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IBeamTool(TimelineBody *timeline_body);
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~IBeamTool();
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/**
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* Gets the type of tool represented by this class
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*/
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ToolType get_type() const;
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protected:
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/**
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* Gets the cursor to display for this tool at this moment.
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*/
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Gdk::Cursor get_cursor() const;
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protected:
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void on_button_press_event(GdkEventButton* event);
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void on_button_release_event(GdkEventButton* event);
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void on_motion_notify_event(GdkEventMotion *event);
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private:
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/* ===== Internal Event Handlers ===== */
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/**
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* An internal event handler, which is called when the scroll slide
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* timer calls it.
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*/
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bool on_scroll_slide_timer();
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private:
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/* ===== Internal Methods ===== */
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/**
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* As the user drags, this function is called to update the position
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* of the moving end of the selection.
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*/
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void set_leading_x(const int x);
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/**
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* Begins, or continues a scroll slide at a given rate
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* @param scroll_slide_rate The distance to slide every timer event
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* in units of 1/256th of the view width.
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*/
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void begin_scroll_slide(int scroll_slide_rate);
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/**
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* Ends a scroll slide, and disconnects the slide timer
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*/
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void end_scroll_slide();
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private:
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/* ==== Internals ===== */
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gavl_time_t dragStartTime;
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sigc::connection scrollSlideEvent;
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int scrollSlideRate;
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/* ===== Constants ===== */
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static const int ScrollSlideRateDivisor;
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static const int ScrollSlideEventInterval;
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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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#endif // TIMELINE_IBEAM_TOOL_HPP
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