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#include <glib.h>
#include <math.h>
#include <pango/pangocairo.h>
#include <pango/pango-font.h>
#include <pango/pango-types.h>
#include "draw.h"
#include "button.h"
#include "log.h"
// Idea: Either make a to_draw queue where we put things we schedule to redraw
// (this will also work for animations in the future)
// or use some flags to trigger drawing
Drawable *draw_create(const char *font, int height, int left_pad, int right_pad, int top_pad, double alpha)
{
Drawable *draw = g_malloc(sizeof(Drawable));
g_assert_nonnull(draw);
log_debug("Pango loading font description '%s'", font);
draw->desc = pango_font_description_from_string(font);
log_debug("Pango found matching font '%s'", pango_font_description_get_family(draw->desc));
draw->height = height;
draw->left_pad = left_pad;
draw->right_pad = right_pad;
draw->top_pad = top_pad;
draw->alpha = alpha;
g_assert(alpha >= 0 && alpha <= 1);
log_debug("Draw context created [height=%d, left_pad=%d, right_pad=%d, top_pad=%d, alpha=%.2lf]", height, left_pad, right_pad, top_pad, alpha);
return draw;
}
void draw_paint(Drawable *draw, Window *win)
{
// FIXME: Does not work for scale != 1
//double scale = window_get_scale(win);
double scale = 1;
int screen_width, screen_height;
window_get_screen_size(win, &screen_width, &screen_height);
int width0 = screen_width - draw->right_pad - draw->left_pad;
int width = round(width0 * scale);
int height = round(draw->height * scale);
cairo_surface_t *surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, width, height);
cairo_t *cr = cairo_create(surface);
cairo_set_fill_rule(cr, CAIRO_FILL_RULE_EVEN_ODD);
cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
int radius = height / 2;
double degree = M_PI / 180.0;
cairo_set_source_rgba(cr, 0.3, 0.3, 0.3, draw->alpha);
// TODO: Here we should paint the shape of the bar, however there is a problem with the surface
// painted in the pixmap to mask the window shape in window_paint_corners.
//
// This is caused by some difference between the two shapes (that should technically be the same)
// which causes a mismatch between the two layers and leaves some black pixels visible
//cairo_arc(cr, radius, radius, radius, 90.0 * degree, 270 * degree);
//cairo_arc(cr, width - radius, radius, radius, 270 * degree, 450 * degree);
//cairo_fill(cr);
cairo_paint(cr);
int line_w = 1 * scale;
cairo_set_line_width(cr, line_w);
int bx = 0;
for (GList *it = draw->btns; it; it = it->next) {
Button *btn = it->data;
PangoLayout *layout = pango_cairo_create_layout(cr);
pango_layout_set_font_description(layout, draw->desc);
int bwidth, bheight = height;
char *btn_text = btn->text;
char tmp[2] = { 0 };
if (btn->fixed_size) {
bwidth = height;
// Get only the first char
tmp[0] = btn->text[0];
btn_text = tmp;
}
pango_layout_set_text(layout, btn_text, -1);
pango_layout_set_alignment(layout, PANGO_ALIGN_CENTER);
int text_w, text_h;
pango_layout_get_pixel_size(layout, &text_w, &text_h);
text_w = ceil(text_w / scale);
text_h = ceil(text_h / scale);
if (!btn->fixed_size) {
bwidth = text_w + 2*radius;
}
int text_x = bx + (bwidth / 2) - (text_w / 2);
int text_y = (bheight / 2) - (text_h / 2);
// purple
cairo_set_source_rgba(cr, 0.502, 0.168, 0.886, 1);
cairo_new_sub_path(cr);
cairo_arc(cr, bx + radius, radius, radius, 90 * degree, 270 * degree);
cairo_arc(cr, bx + bwidth - radius, radius, radius, 270 * degree, 450 * degree);
cairo_close_path(cr);
cairo_fill(cr);
cairo_set_source_rgba(cr, 0.8, 0.8, 0.8, 1);
cairo_new_sub_path(cr);
cairo_arc(cr, bx + radius, radius, radius - line_w , 90 * degree, 270 * degree);
cairo_arc(cr, bx + bwidth - radius, radius, radius - line_w, 270 * degree, 450 * degree);
cairo_close_path(cr);
cairo_stroke(cr);
cairo_set_source_rgb(cr, 0.8, 0.8, 0.8);
cairo_move_to(cr, text_x, text_y);
pango_cairo_update_layout(cr, layout);
pango_cairo_show_layout(cr, layout);
g_object_unref(layout);
int sep = 10 * scale;
bx += height + line_w * 2 + sep;
}
cairo_destroy(cr);
// TODO: Move these somewhere else
window_move(win, draw->left_pad, draw->top_pad);
window_resize(win, width0, draw->height);
window_paint_surface(win, surface, width, height);
cairo_surface_destroy(surface);
}
void draw_set_buttons(Drawable *draw, GList *btns)
{
draw->btns = btns;
}
void draw_destroy(Drawable *draw)
{
pango_font_description_free(draw->desc);
g_free(draw);
}
// vim: ts=4 sw=4 et
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