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Adding contrast to flyline delay text so it's readable now #1451

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Merged
merged 3 commits into from
Aug 8, 2020
Merged

Adding contrast to flyline delay text so it's readable now #1451

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63149ed
Adding contrast to flyline delay text so it's readable now
dpbaines Jul 24, 2020
254f9d7
Rotate and offset text independent of zoom, using screen coordinates
dpbaines Aug 5, 2020
828e968
Make format
dpbaines Aug 5, 2020
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25 changes: 24 additions & 1 deletion vpr/src/draw/draw.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -3229,7 +3229,30 @@ static void draw_flyline_timing_edge(ezgl::point2d start, ezgl::point2d end, flo
ss << 1e9 * incr_delay; //In nanoseconds
std::string incr_delay_str = ss.str();

g->draw_text(text_bbox.center(), incr_delay_str.c_str(), text_bbox.width(), text_bbox.height());
// Get the angle of line, to rotate the text
float text_angle = (180 / M_PI) * atan((end.y - start.y) / (end.x - start.x));

// Get the screen coordinates for text drawing
ezgl::rectangle screen_coords = g->world_to_screen(text_bbox);
g->set_text_rotation(text_angle);

// Set the text colour to black to differentiate it from the line
g->set_font_size(16);
g->set_color(ezgl::color(0, 0, 0));

g->set_coordinate_system(ezgl::SCREEN);

// Find an offset so it is sitting on top/below of the line
float x_offset = screen_coords.center().x - 8 * sin(text_angle * (M_PI / 180));
float y_offset = screen_coords.center().y - 8 * cos(text_angle * (M_PI / 180));

ezgl::point2d offset_text_bbox(x_offset, y_offset);
g->draw_text(offset_text_bbox, incr_delay_str.c_str(), text_bbox.width(), text_bbox.height());

g->set_font_size(14);

g->set_text_rotation(0);
g->set_coordinate_system(ezgl::WORLD);
}
}

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