124 lines
2.8 KiB
C++
124 lines
2.8 KiB
C++
/*
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Copyright (C) 2000-2007 Paul Davis
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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 <iostream>
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#include "panner.h"
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using namespace std;
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static const int triangle_size = 5;
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static void
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null_label_callback (char* buf, unsigned int bufsize)
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{
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/* no label */
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buf[0] = '\0';
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}
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PannerBar::PannerBar (Gtk::Adjustment& adj, PBD::Controllable& c)
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: BarController (adj, c, sigc::ptr_fun (null_label_callback))
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{
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set_style (BarController::Line);
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}
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PannerBar::~PannerBar ()
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{
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}
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bool
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PannerBar::expose (GdkEventExpose* ev)
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{
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Glib::RefPtr<Gdk::Window> win (darea.get_window());
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Glib::RefPtr<Gdk::GC> gc (get_style()->get_base_gc (get_state()));
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BarController::expose (ev);
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/* now draw triangles for left, right and center */
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GdkPoint points[3];
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// left
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points[0].x = 0;
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points[0].y = 0;
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points[1].x = triangle_size;
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points[1].y = 0;
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points[2].x = 0;
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points[2].y = triangle_size;
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gdk_draw_polygon (win->gobj(), gc->gobj(), true, points, 3);
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// center
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points[0].x = (darea.get_width()/2 - triangle_size);
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points[0].y = 0;
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points[1].x = (darea.get_width()/2 + triangle_size);
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points[1].y = 0;
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points[2].x = darea.get_width()/2;
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points[2].y = triangle_size - 1;
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gdk_draw_polygon (win->gobj(), gc->gobj(), true, points, 3);
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// right
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points[0].x = (darea.get_width() - triangle_size);
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points[0].y = 0;
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points[1].x = darea.get_width();
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points[1].y = 0;
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points[2].x = darea.get_width();
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points[2].y = triangle_size;
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gdk_draw_polygon (win->gobj(), gc->gobj(), true, points, 3);
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return true;
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}
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bool
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PannerBar::button_press (GdkEventButton* ev)
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{
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if (ev->button == 1 && ev->type == GDK_BUTTON_PRESS && ev->y < 10) {
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if (ev->x < triangle_size) {
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adjustment.set_value (adjustment.get_lower());
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} else if (ev->x > (darea.get_width() - triangle_size)) {
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adjustment.set_value (adjustment.get_upper());
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} else if (ev->x > (darea.get_width()/2 - triangle_size) &&
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ev->x < (darea.get_width()/2 + triangle_size)) {
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adjustment.set_value (adjustment.get_lower() + ((adjustment.get_upper() - adjustment.get_lower()) / 2.0));
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}
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}
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return BarController::button_press (ev);
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}
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bool
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PannerBar::button_release (GdkEventButton* ev)
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{
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return BarController::button_release (ev);
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}
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