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