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[Summary] Implementing the wave zoom control in the transport bar
This commit is contained in:
VKamyshniy
Paul Davis
parent
a51275dfea
commit
4c4daba2f0
2 changed files with 334 additions and 0 deletions
262
gtk2_ardour/waves_zoom_control.cc
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262
gtk2_ardour/waves_zoom_control.cc
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/*
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Copyright (C) 2014 Waves Audio Ltd.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(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 <cmath>
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#include <stdio.h>
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#include "utils.h"
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#include "waves_zoom_control.h"
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#include "i18n.h"
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#include "dbg_msg.h"
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WavesZoomControl::WavesZoomControl (Gtk::Adjustment& adjustment)
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: _adjustment (adjustment)
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, _state (StateIdle)
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, _begin_motion_zoom (1)
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, _begin_motion_y (0)
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, _state_idle_pixbuf (get_icon ("wave_zoom_control"))
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, _state_sliding_pixbuf (get_icon ("wave_zoom_control_sliding"))
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, _state_increasing_zoom_pixbuf (get_icon ("wave_zoom_control_increasing_zoom"))
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, _state_decreasing_zoom_pixbuf (get_icon ("wave_zoom_control_decreasing_zoom"))
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{
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}
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WavesZoomControl::~WavesZoomControl()
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{
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}
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void
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WavesZoomControl::render (cairo_t* cr)
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{
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Glib::RefPtr<Gdk::Pixbuf> pixbuf;
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switch (_state) {
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case StateIdle:
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case StateButtonUpLeft:
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case StateButtonDownLeft:
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pixbuf = _state_idle_pixbuf;
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break;
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case StateSliding:
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pixbuf = _state_sliding_pixbuf;
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break;
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case StateButtonUpActive:
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pixbuf = _state_increasing_zoom_pixbuf;
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break;
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case StateButtonDownActive:
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pixbuf = _state_decreasing_zoom_pixbuf;
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break;
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default:
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dbg_msg("WavesZoomControl::render () : Unexpected state of WavesZoomControl!");
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break;
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}
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if (pixbuf) {
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double x = (get_width() - pixbuf->get_width())/2.0;
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double y = (get_height() - pixbuf->get_height())/2.0;
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cairo_rectangle (cr, x, y, pixbuf->get_width(), pixbuf->get_height());
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gdk_cairo_set_source_pixbuf (cr, pixbuf->gobj(), x, y);
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cairo_fill (cr);
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}
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}
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void
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WavesZoomControl::on_size_request (Gtk::Requisition* req)
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{
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CairoWidget::on_size_request (req);
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req->width = _state_idle_pixbuf-get_width ();
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req->height = _state_idle_pixbuf-get_height ();
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}
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bool
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WavesZoomControl::on_button_press_event (GdkEventButton *ev)
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{
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if (ev->type == GDK_2BUTTON_PRESS) {
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; //pending feature
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} else {
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ControlArea area = _area_by_point (ev->x, ev->y);
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switch (area) {
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case Nothing:
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break;
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case SlidingArea:
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_state = StateSliding;
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_begin_motion_zoom = _adjustment.get_value ();
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_begin_motion_y = ev->y;
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queue_draw ();
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break;
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case ButtonUp:
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_state = StateButtonUpActive;
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queue_draw ();
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break;
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case ButtonDown:
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_state = StateButtonDownActive;
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queue_draw ();
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break;
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default:
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dbg_msg("WavesZoomControl::on_button_press_event () : Unexpected area inside of WavesZoomControl!");
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break;
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}
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}
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return true;
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}
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bool
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WavesZoomControl::on_button_release_event (GdkEventButton *ev)
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{
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switch (_state) {
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case StateIdle:
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case StateButtonUpLeft:
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case StateButtonDownLeft:
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case StateSliding:
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break;
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case StateButtonUpActive:
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_adjustment.set_value (std::min (_adjustment.get_value () + _adjustment.get_page_size (),
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_adjustment.get_upper ()));
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break;
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case StateButtonDownActive:
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_adjustment.set_value (std::max (_adjustment.get_value () - _adjustment.get_page_size (),
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_adjustment.get_lower ()));
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break;
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default:
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dbg_msg("WavesZoomControl::on_button_release_event () : Unexpected state of WavesZoomControl!");
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break;
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}
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if (_state != StateIdle) {
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queue_draw ();
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}
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_state = StateIdle;
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return true;
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}
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bool
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WavesZoomControl::on_motion_notify_event (GdkEventMotion* ev)
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{
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switch (_state) {
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case StateIdle:
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case StateButtonUpLeft:
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case StateButtonDownLeft:
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case StateButtonUpActive:
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case StateButtonDownActive:
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break;
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case StateSliding:
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_adjustment.set_value (std::max (std::min (_begin_motion_zoom + _adjustment.get_step_increment () * (_begin_motion_y - ev->y),
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_adjustment.get_upper ()),
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_adjustment.get_lower ()));
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break;
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default:
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dbg_msg("WavesZoomControl::on_enter_notify_event () : Unexpected state of WavesZoomControl!");
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break;
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}
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return true;
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}
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bool
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WavesZoomControl::on_enter_notify_event (GdkEventCrossing* ev)
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{
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switch (_state) {
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case StateIdle:
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break;
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case StateSliding:
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break;
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case StateButtonUpLeft:
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_state = StateButtonUpActive;
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queue_draw ();
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break;
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case StateButtonDownLeft:
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_state = StateButtonDownActive;
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queue_draw ();
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break;
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default:
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dbg_msg("WavesZoomControl::on_enter_notify_event () : Unexpected state of WavesZoomControl!");
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break;
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}
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return CairoWidget::on_enter_notify_event (ev);
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}
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bool
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WavesZoomControl::on_leave_notify_event (GdkEventCrossing* ev)
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{
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switch (_state) {
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case StateIdle:
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break;
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case StateSliding:
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break;
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case StateButtonUpActive:
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_state = StateButtonUpLeft;
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queue_draw ();
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break;
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case StateButtonDownActive:
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_state = StateButtonDownLeft;
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queue_draw ();
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break;
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default:
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dbg_msg("WavesZoomControl::on_leave_notify_event () : Unexpected state of WavesZoomControl!");
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break;
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}
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return CairoWidget::on_leave_notify_event (ev);
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}
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WavesZoomControl::ControlArea
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WavesZoomControl::_area_by_point (int x, int y)
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{
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int width = get_allocation().get_width ();
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int height = get_allocation().get_height ();
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if ((x < 0) || (y < 0) ||
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(x > width) || (y > height)) {
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return Nothing;
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}
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if ((x > 3) && (x < 14)) {
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if ( y < 13) {
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return ButtonUp;
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}
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if (y > 13) {
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return ButtonDown;
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}
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}
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return SlidingArea;
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}
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72
gtk2_ardour/waves_zoom_control.h
Normal file
72
gtk2_ardour/waves_zoom_control.h
Normal file
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@ -0,0 +1,72 @@
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/*
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Copyright (C) 2014 Waves Audio Ltd.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(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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#ifndef __gtk2_waves_zoom_control_h__
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#define __gtk2_waves_zoom_control_h__
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#include <gtkmm/adjustment.h>
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#include "gtkmm2ext/cairo_widget.h"
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class WavesZoomControl : public CairoWidget
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{
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public:
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WavesZoomControl (Gtk::Adjustment& adjustment);
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virtual ~WavesZoomControl ();
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bool on_button_press_event (GdkEventButton*);
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bool on_button_release_event (GdkEventButton*);
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protected:
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void render (cairo_t *);
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void on_size_request (Gtk::Requisition* req);
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bool on_enter_notify_event (GdkEventCrossing*);
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bool on_leave_notify_event (GdkEventCrossing*);
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bool on_motion_notify_event (GdkEventMotion*);
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private:
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Gtk::Adjustment& _adjustment;
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enum State {
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StateIdle = 0,
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StateSliding,
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StateButtonUpActive,
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StateButtonUpLeft,
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StateButtonDownActive,
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StateButtonDownLeft
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} _state;
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enum ControlArea {
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Nothing = 0,
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SlidingArea,
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ButtonUp,
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ButtonDown
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};
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double _begin_motion_zoom;
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double _begin_motion_y;
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Glib::RefPtr<Gdk::Pixbuf> _state_idle_pixbuf;
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Glib::RefPtr<Gdk::Pixbuf> _state_sliding_pixbuf;
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Glib::RefPtr<Gdk::Pixbuf> _state_increasing_zoom_pixbuf;
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Glib::RefPtr<Gdk::Pixbuf> _state_decreasing_zoom_pixbuf;
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ControlArea _area_by_point (int x, int y);
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};
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#endif /* __gtk2_waves_zoom_control_h__ */
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