ruler.cpp

#pragma warning(push, 0)
#include <FL/fl_draw.H>
#pragma warning(pop)

#include <cstdio>

#include "ruler.h"
#include "main-window.h"
#include "themes.h"

Ruler::Ruler(int x, int y, int w, int h, const char *l) : Fl_Box(x, y, w, h, l) {}

int Ruler::handle(int event) {
	Main_Window *mw = (Main_Window *)user_data();
	if (event == FL_PUSH && Fl::event_button() == FL_RIGHT_MOUSE) {
		mw->toggle_bookmark_from_x_pos(Fl::event_x());
		return 1;
	}
	if ((event == FL_PUSH || (event == FL_DRAG && !mw->playing())) && Fl::event_button() != FL_RIGHT_MOUSE) {
		mw->set_tick_from_x_pos(Fl::event_x());
		return 1;
	}
	if (event == FL_ENTER && mw->song_loaded()) {
		fl_cursor(FL_CURSOR_HAND);
		return 1;
	}
	if (event == FL_LEAVE) {
		fl_cursor(FL_CURSOR_DEFAULT);
		return 1;
	}
	return Fl_Box::handle(event);
}

static inline void print_tick_label(char *s, size_t size, int n) {
	snprintf(s, size, "%d", n);
}

void Ruler::draw() {
	int X = x(), Y = y(), W = w(), H = h();
	Main_Window *mw = (Main_Window *)user_data();
	int px = mw->song_ticks_per_step() * TICK_WIDTHS[mw->zoom()+1];
	int s = _options.steps_per_beat * px;
	int S = _options.beats_per_measure * s;
	int p = _options.pickup_offset * px + WHITE_KEY_WIDTH;
	// background
	fl_color(FL_DARK2);
	fl_rectf(X, Y, W, H);
	// edges
	fl_color(OS::current_theme() == OS::Theme::HIGH_CONTRAST ? FL_SELECTION_COLOR : fl_color_average(FL_FOREGROUND_COLOR, FL_BACKGROUND_COLOR, 0.4f));
	fl_xyline(X, Y+H-1, X+W-1);
	// tick marks and labels
	int mx = mw->song_scroll_x();
	// tick marks
	int o = (p / S + 1) * S - p;
	int r = mx % s;
	int n = mx / s + 1;
	for (int i = s-r-1; i < W + o; i += s, n++) {
		int d = (n % _options.beats_per_measure) ? H / 2 : 0;
		fl_yxline(X+i - o, Y+d, Y+H-1);
	}
	// labels
	char t[8] = {};
	fl_font(FL_COURIER, 12);
	fl_color(FL_FOREGROUND_COLOR);
	fl_push_clip(X, Y, W, H);
	int O = (p / S + 1) * S - p;
	int R = mx % S;
	int N = mx / S - p / S;
	for (int i = S-R-1; i < W+S + O; i += S, N++) {
		if (N >= 0) {
			print_tick_label(t, sizeof(t), N);
			fl_draw(t, X+i-S+1 - O, Y, S-2, H, FL_ALIGN_BOTTOM_RIGHT | FL_ALIGN_INSIDE | FL_ALIGN_CLIP);
		}
	}
	fl_pop_clip();

	fl_color(BOOKMARK_COLOR);
	const std::set<int32_t> &bookmarks = mw->bookmarks();
	for (int32_t bookmark : bookmarks) {
		int x_pos = X + bookmark * TICK_WIDTHS[mw->zoom()+1] + WHITE_KEY_WIDTH - mx - 1;
		fl_polygon(x_pos - 6, Y + H - 8, x_pos + 6, Y + H - 8, x_pos, Y + H - 2);
	}
}